【机械类文献翻译】冲压变形1

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机械专业中英文对照翻译大全

机械专业英语词汇中英文对照翻译一览表陶瓷ceramics合成纤维synthetic fibre电化学腐蚀electrochemical corrosion车架automotive chassis悬架suspension转向器redirector变速器speed changer板料冲压sheet metal parts孔加工spot facing machining车间workshop工程技术人员engineer气动夹紧pneuma lock数学模型mathematical model画法几何descriptive geometry机械制图Mechanical drawing投影projection视图view剖视图profile chart标准件standard component零件图part drawing装配图assembly drawing尺寸标注size marking技术要求technical requirements刚度rigidity内力internal force位移displacement截面section疲劳极限fatigue limit断裂fracture塑性变形plastic distortion脆性材料brittleness material刚度准则rigidity criterion垫圈washer垫片spacer直齿圆柱齿轮straight toothed spur gear 斜齿圆柱齿轮helical-spur gear直齿锥齿轮straight bevel gear运动简图kinematic sketch齿轮齿条pinion and rack蜗杆蜗轮worm and worm gear虚约束passive constraint曲柄crank摇杆racker凸轮cams共轭曲线conjugate curve范成法generation method定义域definitional domain值域range导数\\微分differential coefficient求导derivation定积分definite integral不定积分indefinite integral曲率curvature偏微分partial differential毛坯rough游标卡尺slide caliper千分尺micrometer calipers攻丝tap二阶行列式second order determinant 逆矩阵inverse matrix线性方程组linear equations概率probability随机变量random variable排列组合permutation and combination 气体状态方程equation of state of gas动能kinetic energy势能potential energy机械能守恒conservation of mechanical energy动量momentum桁架truss轴线axes余子式cofactor逻辑电路logic circuit触发器flip-flop脉冲波形pulse shape数模digital analogy液压传动机构fluid drive mechanism机械零件mechanical parts淬火冷却quench淬火hardening回火tempering调质hardening and tempering磨粒abrasive grain结合剂bonding agent砂轮grinding wheel后角clearance angle龙门刨削planing主轴spindle主轴箱headstock卡盘chuck加工中心machining center 车刀lathe tool车床lathe钻削镗削bore车削turning磨床grinder基准benchmark钳工locksmith锻forge压模stamping焊weld拉床broaching machine拉孔broaching装配assembling铸造found流体动力学fluid dynamics流体力学fluid mechanics加工machining液压hydraulic pressure切线tangent机电一体化mechanotronics mechanical-electrical integration气压air pressure pneumatic pressure稳定性stability介质medium液压驱动泵fluid clutch液压泵hydraulic pump阀门valve失效invalidation强度intensity载荷load应力stress安全系数safty factor可靠性reliability螺纹thread螺旋helix键spline销pin滚动轴承rolling bearing滑动轴承sliding bearing弹簧spring制动器arrester brake十字结联轴节crosshead联轴器coupling链chain皮带strap精加工finish machining粗加工rough machining变速箱体gearbox casing腐蚀rust氧化oxidation磨损wear耐用度durability随机信号random signal离散信号discrete signal超声传感器ultrasonic sensor 集成电路integrate circuit挡板orifice plate残余应力residual stress套筒sleeve扭力torsion冷加工cold machining电动机electromotor汽缸cylinder过盈配合interference fit热加工hotwork摄像头CCD camera倒角rounding chamfer优化设计optimal design工业造型设计industrial moulding design有限元finite element滚齿hobbing插齿gear shaping伺服电机actuating motor铣床milling machine钻床drill machine镗床boring machine步进电机stepper motor丝杠screw rod导轨lead rail组件subassembly可编程序逻辑控制器Programmable Logic Controller PLC 电火花加工electric spark machining电火花线切割加工electrical discharge wire - cutting 相图phase diagram热处理heat treatment固态相变solid state phase changes有色金属nonferrous metal陶瓷ceramics合成纤维synthetic fibre电化学腐蚀electrochemical corrosion车架automotive chassis悬架suspension转向器redirector变速器speed changer板料冲压sheet metal parts孔加工spot facing machining车间workshop工程技术人员engineer气动夹紧pneuma lock数学模型mathematical model画法几何descriptive geometry机械制图Mechanical drawing投影projection视图view剖视图profile chart标准件standard component零件图part drawing装配图assembly drawing尺寸标注size marking技术要求technical requirements刚度rigidity内力internal force位移displacement截面section疲劳极限fatigue limit断裂fracture塑性变形plastic distortion脆性材料brittleness material刚度准则rigidity criterion垫圈washer垫片spacer直齿圆柱齿轮straight toothed spur gear 斜齿圆柱齿轮helical-spur gear直齿锥齿轮straight bevel gear运动简图kinematic sketch齿轮齿条pinion and rack蜗杆蜗轮worm and worm gear虚约束passive constraint曲柄crank摇杆racker凸轮cams共轭曲线conjugate curve范成法generation method定义域definitional domain值域range导数\\微分differential coefficient求导derivation定积分definite integral不定积分indefinite integral曲率curvature偏微分partial differential毛坯rough游标卡尺slide caliper千分尺micrometer calipers攻丝tap二阶行列式second order determinant 逆矩阵inverse matrix线性方程组linear equations概率probability随机变量random variable排列组合permutation and combination气体状态方程equation of state of gas动能kinetic energy势能potential energy机械能守恒conservation of mechanical energy 动量momentum桁架truss轴线axes余子式cofactor逻辑电路logic circuit触发器flip-flop脉冲波形pulse shape数模digital analogy液压传动机构fluid drive mechanism机械零件mechanical parts淬火冷却quench淬火hardening回火tempering调质hardening and tempering磨粒abrasive grain结合剂bonding agent砂轮grinding wheel Assembly line 组装线Layout 布置图Conveyer 流水线物料板Rivet table 拉钉机Rivet gun 拉钉枪Screw driver 起子Pneumatic screw driver 气动起子worktable 工作桌OOBA 开箱检查fit together 组装在一起fasten 锁紧(螺丝)fixture 夹具(治具)pallet 栈板barcode 条码barcode scanner 条码扫描器fuse together 熔合fuse machine热熔机repair修理operator作业员QC品管supervisor 课长ME 制造工程师MT 制造生技cosmetic inspect 外观检查inner parts inspect 内部检查thumb screw 大头螺丝lbs. inch 镑、英寸EMI gasket 导电条front plate 前板rear plate 后板chassis 基座bezel panel 面板power button 电源按键reset button 重置键Hi-pot test of SPS 高源高压测试Voltage switch of SPS 电源电压接拉键sheet metal parts 冲件plastic parts 塑胶件SOP 制造作业程序material check list 物料检查表work cell 工作间trolley 台车carton 纸箱sub-line 支线left fork 叉车personnel resource department 人力资源部production department生产部门planning department企划部QC Section品管科stamping factory冲压厂painting factory烤漆厂molding factory成型厂common equipment常用设备uncoiler and straightener整平机punching machine 冲床robot机械手hydraulic machine油压机lathe车床planer |plein|刨床miller铣床grinder磨床linear cutting线切割electrical sparkle电火花welder电焊机staker=reviting machine铆合机position职务president董事长general manager总经理special assistant manager特助factory director厂长department director部长deputy manager | =vice manager副理section supervisor课长deputy section supervisor =vice section superisor副课长group leader/supervisor组长line supervisor线长assistant manager助理to move, to carry, to handle搬运be put in storage入库pack packing包装to apply oil擦油to file burr 锉毛刺final inspection终检to connect material接料to reverse material 翻料wet station沾湿台Tiana天那水cleaning cloth抹布to load material上料to unload material卸料to return material/stock to退料scraped |\\'skr?pid|报废scrape ..v.刮;削deficient purchase来料不良manufacture procedure制程deficient manufacturing procedure制程不良oxidation |\\' ksi\\'dei?n|氧化scratch刮伤dents压痕defective upsiding down抽芽不良defective to staking铆合不良embedded lump镶块feeding is not in place送料不到位stamping-missing漏冲production capacity生产力education and training教育与训练proposal improvement提案改善spare parts=buffer备件forklift叉车trailer=long vehicle拖板车compound die合模die locker锁模器pressure plate=plate pinch压板bolt螺栓administration/general affairs dept总务部automatic screwdriver电动启子thickness gauge厚薄规gauge(or jig)治具power wire电源线buzzle蜂鸣器defective product label不良标签identifying sheet list标示单location地点present members出席人员subject主题conclusion结论decision items决议事项responsible department负责单位pre-fixed finishing date预定完成日approved by / checked by / prepared by核准/审核/承办PCE assembly production schedule sheet PCE组装厂生产排配表model机锺work order工令revision版次remark备注production control confirmation生产确认checked by初审approved by核准department部门stock age analysis sheet 库存货龄分析表on-hand inventory现有库存available material良品可使用obsolete material良品已呆滞to be inspected or reworked 待验或重工total合计cause description原因说明part number/ P/N 料号type形态item/group/class类别quality品质prepared by制表notes说明year-end physical inventory difference analysis sheet 年终盘点差异分析表physical inventory盘点数量physical count quantity帐面数量difference quantity差异量cause analysis原因分析raw materials原料materials物料finished product成品semi-finished product半成品packing materials包材good product/accepted goods/ accepted parts/good parts 良品defective product/non-good parts不良品disposed goods处理品warehouse/hub仓库on way location在途仓oversea location海外仓spare parts physical inventory list备品盘点清单spare molds location模具备品仓skid/pallet栈板tox machine自铆机wire EDM线割EDM放电机coil stock卷料sheet stock片料tolerance工差score=groove压线cam block滑块pilot导正筒trim剪外边pierce剪内边drag form压锻差pocket for the punch head挂钩槽slug hole废料孔feature die公母模expansion dwg展开图radius半径shim(wedge)楔子torch-flame cut火焰切割set screw止付螺丝form block折刀stop pin定位销round pierce punch=die button圆冲子shape punch=die insert异形子stock locater block定位块under cut=scrap chopper清角active plate活动板baffle plate挡块cover plate盖板male die公模female die母模groove punch压线冲子air-cushion eject-rod气垫顶杆spring-box eject-plate弹簧箱顶板bushing block衬套insert 入块club car高尔夫球车capability能力parameter参数factor系数phosphate皮膜化成viscosity涂料粘度alkalidipping脱脂main manifold主集流脉bezel斜视规blanking穿落模dejecting顶固模demagnetization去磁;消磁high-speed transmission高速传递heat dissipation热传rack上料degrease脱脂rinse水洗alkaline etch龄咬desmut剥黑膜D.I. rinse纯水次Chromate铬酸处理Anodize阳性处理seal封孔revision版次part number/P/N料号good products良品scraped products报放心品defective products不良品finished products成品disposed products处理品barcode条码flow chart流程表单assembly组装stamping冲压molding成型spare parts=buffer备品coordinate座标dismantle the die折模auxiliary fuction辅助功能poly-line多义线heater band 加热片thermocouple热电偶sand blasting喷沙grit 砂砾derusting machine除锈机degate打浇口dryer烘干机induction感应induction light感应光response=reaction=interaction感应ram连杆edge finder巡边器concave凸convex凹short射料不足nick缺口speck瑕??shine亮班splay 银纹gas mark焦痕delamination起鳞cold slug冷块blush 导色gouge沟槽;凿槽satin texture段面咬花witness line证示线patent专利grit沙砾granule=peuet=grain细粒grit maker抽粒机cushion缓冲magnalium镁铝合金magnesium镁金metal plate钣金lathe车mill锉plane刨grind磨drill铝boring镗blinster气泡fillet镶;嵌边through-hole form通孔形式voller pin formality滚针形式cam driver铡楔shank摸柄crank shaft曲柄轴augular offset角度偏差velocity速度production tempo生产进度现状torque扭矩spline=the multiple keys花键quenching淬火tempering回火annealing退火carbonization碳化tungsten high speed steel钨高速的moly high speed steel钼高速的organic solvent有机溶剂bracket小磁导liaison联络单volatile挥发性resistance电阻ion离子titrator滴定仪beacon警示灯coolant冷却液crusher破碎机阿基米德蜗杆Archimedes worm安全系数safety factor; factor of safety安全载荷safe load凹面、凹度concavity扳手wrench板簧flat leaf spring半圆键woodruff key变形deformation摆杆oscillating bar摆动从动件oscillating follower摆动从动件凸轮机构cam with oscillating follower 摆动导杆机构oscillating guide-bar mechanism 摆线齿轮cycloidal gear摆线齿形cycloidal tooth profile摆线运动规律cycloidal motion摆线针轮cycloidal-pin wheel包角angle of contact保持架cage背对背安装back-to-back arrangement背锥back cone ；normal cone背锥角back angle背锥距back cone distance比例尺scale比热容specific heat capacity闭式链closed kinematic chain闭链机构closed chain mechanism臂部arm变频器frequency converters变频调速frequency control of motor speed 变速speed change变速齿轮change gear change wheel变位齿轮modified gear变位系数modification coefficient标准齿轮standard gear标准直齿轮standard spur gear表面质量系数superficial mass factor表面传热系数surface coefficient of heat transfer 表面粗糙度surface roughness并联式组合combination in parallel并联机构parallel mechanism并联组合机构parallel combined mechanism并行工程concurrent engineering并行设计concurred design, CD不平衡相位phase angle of unbalance不平衡imbalance (or unbalance)不平衡量amount of unbalance不完全齿轮机构intermittent gearing波发生器wave generator波数number of waves补偿compensation参数化设计parameterization design, PD残余应力residual stress操纵及控制装置operation control device槽轮Geneva wheel槽轮机构Geneva mechanism ；Maltese cross 槽数Geneva numerate槽凸轮groove cam侧隙backlash差动轮系differential gear train差动螺旋机构differential screw mechanism差速器differential常用机构conventional mechanism; mechanism in common use车床lathe承载量系数bearing capacity factor承载能力bearing capacity成对安装paired mounting尺寸系列dimension series齿槽tooth space齿槽宽spacewidth齿侧间隙backlash齿顶高addendum齿顶圆addendum circle齿根高dedendum齿根圆dedendum circle齿厚tooth thickness齿距circular pitch齿宽face width齿廓tooth profile齿廓曲线tooth curve齿轮gear齿轮变速箱speed-changing gear boxes齿轮齿条机构pinion and rack齿轮插刀pinion cutter; pinion-shaped shaper cutter 齿轮滚刀hob ,hobbing cutter齿轮机构gear齿轮轮坯blank齿轮传动系pinion unit齿轮联轴器gear coupling齿条传动rack gear齿数tooth number齿数比gear ratio齿条rack齿条插刀rack cutter; rack-shaped shaper cutter齿形链、无声链silent chain齿形系数form factor齿式棘轮机构tooth ratchet mechanism插齿机gear shaper重合点coincident points重合度contact ratio冲床punch传动比transmission ratio, speed ratio传动装置gearing; transmission gear传动系统driven system传动角transmission angle传动轴transmission shaft串联式组合combination in series串联式组合机构series combined mechanism 串级调速cascade speed control创新innovation creation创新设计creation design垂直载荷、法向载荷normal load唇形橡胶密封lip rubber seal磁流体轴承magnetic fluid bearing从动带轮driven pulley从动件driven link, follower从动件平底宽度width of flat-face从动件停歇follower dwell从动件运动规律follower motion从动轮driven gear粗线bold line粗牙螺纹coarse thread大齿轮gear wheel打包机packer打滑slipping带传动belt driving带轮belt pulley带式制动器band brake单列轴承single row bearing单向推力轴承single-direction thrust bearing单万向联轴节single universal joint单位矢量unit vector当量齿轮equivalent spur gear; virtual gear当量齿数equivalent teeth number; virtual number of teeth 当量摩擦系数equivalent coefficient of friction当量载荷equivalent load刀具cutter导数derivative倒角chamfer导热性conduction of heat导程lead导程角lead angle等加等减速运动规律parabolic motion; constant acceleration and deceleration motion等速运动规律uniform motion; constant velocity motion等径凸轮conjugate yoke radial cam等宽凸轮constant-breadth cam等效构件equivalent link等效力equivalent force等效力矩equivalent moment of force等效量equivalent等效质量equivalent mass等效转动惯量equivalent moment of inertia等效动力学模型dynamically equivalent model底座chassis低副lower pair点划线chain dotted line（疲劳）点蚀pitting垫圈gasket垫片密封gasket seal碟形弹簧belleville spring顶隙bottom clearance定轴轮系ordinary gear train; gear train with fixed axes 动力学dynamics动密封kinematical seal动能dynamic energy动力粘度dynamic viscosity动力润滑dynamic lubrication动平衡dynamic balance动平衡机dynamic balancing machine动态特性dynamic characteristics动态分析设计dynamic analysis design动压力dynamic reaction动载荷dynamic load端面transverse plane端面参数transverse parameters端面齿距transverse circular pitch端面齿廓transverse tooth profile端面重合度transverse contact ratio端面模数transverse module端面压力角transverse pressure angle锻造forge对称循环应力symmetry circulating stress对心滚子从动件radial (or in-line ) roller follower对心直动从动件radial (or in-line ) translating follower对心移动从动件radial reciprocating follower对心曲柄滑块机构in-line slider-crank (or crank-slider) mechanism多列轴承multi-row bearing多楔带poly V-belt多项式运动规律polynomial motion多质量转子rotor with several masses惰轮idle gear额定寿命rating life额定载荷load ratingII 级杆组dyad发生线generating line发生面generating plane法面normal plane法面参数normal parameters法面齿距normal circular pitch法面模数normal module法面压力角normal pressure angle法向齿距normal pitch法向齿廓normal tooth profile法向直廓蜗杆straight sided normal worm法向力normal force反馈式组合feedback combining反向运动学inverse ( or backward) kinematics 反转法kinematic inversion反正切Arctan范成法generating cutting仿形法form cutting方案设计、概念设计concept design, CD防振装置shockproof device飞轮flywheel飞轮矩moment of flywheel非标准齿轮nonstandard gear非接触式密封non-contact seal非周期性速度波动aperiodic speed fluctuation非圆齿轮non-circular gear粉末合金powder metallurgy分度线reference line; standard pitch line分度圆reference circle; standard (cutting) pitch circle 分度圆柱导程角lead angle at reference cylinder分度圆柱螺旋角helix angle at reference cylinder分母denominator分子numerator分度圆锥reference cone; standard pitch cone分析法analytical method封闭差动轮系planetary differential复合铰链compound hinge复合式组合compound combining复合轮系compound (or combined) gear train 复合平带compound flat belt复合应力combined stress复式螺旋机构Compound screw mechanism复杂机构 complex mechanism杆组Assur group干涉interference刚度系数stiffness coefficient刚轮rigid circular spline钢丝软轴wire soft shaft刚体导引机构body guidance mechanism刚性冲击rigid impulse (shock)刚性转子rigid rotor刚性轴承rigid bearing刚性联轴器rigid coupling高度系列height series高速带high speed belt高副higher pair格拉晓夫定理Grashoff`s law根切undercutting公称直径nominal diameter高度系列height series功work工况系数application factor工艺设计technological design工作循环图working cycle diagram工作机构operation mechanism工作载荷external loads工作空间working space工作应力working stress工作阻力effective resistance工作阻力矩effective resistance moment 公法线common normal line公共约束general constraint公制齿轮metric gears功率power功能分析设计function analyses design 共轭齿廓conjugate profiles共轭凸轮conjugate cam构件link鼓风机blower固定构件fixed link; frame固体润滑剂solid lubricant关节型操作器jointed manipulator惯性力inertia force惯性力矩moment of inertia ,shaking moment 惯性力平衡balance of shaking force惯性力完全平衡full balance of shaking force惯性力部分平衡partial balance of shaking force 惯性主矩resultant moment of inertia惯性主失resultant vector of inertia冠轮crown gear广义机构generation mechanism广义坐标generalized coordinate轨迹生成path generation轨迹发生器path generator滚刀hob滚道raceway滚动体rolling element滚动轴承rolling bearing滚动轴承代号rolling bearing identification code 滚针needle roller滚针轴承needle roller bearing滚子roller滚子轴承roller bearing滚子半径radius of roller滚子从动件roller follower滚子链roller chain滚子链联轴器double roller chain coupling 滚珠丝杆ball screw滚柱式单向超越离合器roller clutch过度切割undercutting函数发生器function generator函数生成function generation含油轴承oil bearing耗油量oil consumption耗油量系数oil consumption factor赫兹公式H. Hertz equation合成弯矩resultant bending moment合力resultant force合力矩resultant moment of force黑箱black box横坐标abscissa互换性齿轮interchangeable gears花键spline滑键、导键feather key滑动轴承sliding bearing滑动率sliding ratio滑块slider环面蜗杆toroid helicoids worm环形弹簧annular spring缓冲装置shocks; shock-absorber灰铸铁grey cast iron回程return回转体平衡balance of rotors混合轮系 compound gear train积分integrate机电一体化系统设计mechanical-electrical integration system design机构mechanism机构分析analysis of mechanism机构平衡balance of mechanism机构学mechanism机构运动设计kinematic design of mechanism机构运动简图kinematic sketch of mechanism机构综合synthesis of mechanism机构组成constitution of mechanism机架frame, fixed link机架变换kinematic inversion机器machine机器人robot机器人操作器manipulator机器人学robotics技术过程technique process技术经济评价technical and economic evaluation 技术系统technique system机械machinery机械创新设计mechanical creation design, MCD 机械系统设计mechanical system design, MSD 机械动力分析dynamic analysis of machinery机械动力设计dynamic design of machinery机械动力学dynamics of machinery机械的现代设计modern machine design机械系统mechanical system机械利益mechanical advantage机械平衡balance of machinery机械手manipulator机械设计machine design; mechanical design机械特性mechanical behavior机械调速mechanical speed governors机械效率mechanical efficiency机械原理theory of machines and mechanisms机械运转不均匀系数coefficient of speed fluctuation机械无级变速mechanical stepless speed changes基础机构fundamental mechanism基本额定寿命basic rating life基于实例设计case-based design,CBD基圆base circle基圆半径radius of base circle基圆齿距base pitch基圆压力角pressure angle of base circle基圆柱base cylinder基圆锥base cone急回机构quick-return mechanism急回特性quick-return characteristics急回系数advance-to return-time ratio急回运动quick-return motion棘轮ratchet棘轮机构ratchet mechanism棘爪pawl极限位置extreme (or limiting) position极位夹角crank angle between extreme (or limiting) positions计算机辅助设计computer aided design, CAD计算机辅助制造computer aided manufacturing, CAM计算机集成制造系统computer integrated manufacturing system, CIMS计算力矩factored moment; calculation moment计算弯矩calculated bending moment加权系数weighting efficient加速度acceleration加速度分析acceleration analysis加速度曲线acceleration diagram尖点pointing; cusp尖底从动件knife-edge follower间隙backlash间歇运动机构intermittent motion mechanism减速比reduction ratio减速齿轮、减速装置reduction gear减速器speed reducer减摩性anti-friction quality渐开螺旋面involute helicoid渐开线involute渐开线齿廓involute profile渐开线齿轮involute gear渐开线发生线generating line of involute渐开线方程involute equation渐开线函数involute function渐开线蜗杆involute worm渐开线压力角pressure angle of involute渐开线花键involute spline简谐运动simple harmonic motion键key键槽keyway交变应力repeated stress交变载荷repeated fluctuating load交叉带传动cross-belt drive交错轴斜齿轮crossed helical gears胶合scoring角加速度angular acceleration角速度angular velocity角速比angular velocity ratio角接触球轴承angular contact ball bearing角接触推力轴承angular contact thrust bearing 角接触向心轴承angular contact radial bearing 角接触轴承angular contact bearing铰链、枢纽hinge校正平面correcting plane接触应力contact stress接触式密封contact seal阶梯轴multi-diameter shaft结构structure结构设计structural design截面section节点pitch point节距circular pitch; pitch of teeth节线pitch line节圆pitch circle节圆齿厚thickness on pitch circle节圆直径pitch diameter节圆锥pitch cone节圆锥角pitch cone angle解析设计analytical design紧边tight-side紧固件fastener径节diametral pitch径向radial direction径向当量动载荷dynamic equivalent radial load径向当量静载荷static equivalent radial load径向基本额定动载荷basic dynamic radial load rating径向基本额定静载荷basic static radial load tating径向接触轴承radial contact bearing径向平面radial plane径向游隙radial internal clearance径向载荷radial load径向载荷系数radial load factor径向间隙clearance静力static force静平衡static balance静载荷static load静密封static seal局部自由度passive degree of freedom矩阵matrix矩形螺纹square threaded form锯齿形螺纹buttress thread form矩形牙嵌式离合器square-jaw positive-contact clutch 绝对尺寸系数absolute dimensional factor绝对运动absolute motion绝对速度absolute velocity均衡装置load balancing mechanism抗压强度compression strength开口传动open-belt drive开式链open kinematic chain开链机构open chain mechanism可靠度degree of reliability可靠性reliability可靠性设计reliability design, RD空气弹簧air spring空间机构spatial mechanism空间连杆机构spatial linkage空间凸轮机构spatial cam空间运动副spatial kinematic pair空间运动链spatial kinematic chain 空转idle宽度系列width series框图block diagram雷诺方程Reynolds‘s equation离心力centrifugal force离心应力centrifugal stress离合器clutch离心密封centrifugal seal理论廓线pitch curve理论啮合线theoretical line of action 隶属度membership力force力多边形force polygon力封闭型凸轮机构force-drive (or force-closed) cam mechanism力矩moment力平衡equilibrium力偶couple力偶矩moment of couple连杆connecting rod, coupler连杆机构linkage连杆曲线coupler-curve连心线line of centers链chain链传动装置chain gearing链轮sprocket sprocket-wheel sprocket gear chain wheel联组V 带tight-up V belt联轴器coupling shaft coupling两维凸轮two-dimensional cam临界转速critical speed六杆机构six-bar linkage龙门刨床double Haas planer轮坯blank。

冲压原理及基本变形

（4）加預彎（如圖）
(5)外加調整 (6)設計上選用彈性系數大，屈服極限小、機械性能穩定的材料。
沖壓原理及基本變形
2003.09.10
Page:16
四、彎曲U形件單邊間隙 t:材料厚度
Z=t+△+ct
△料厚正偏差
ct彎曲件高度和彎曲長度而決定之系數 c值一般有 0.04~0.15
五、彎曲問題：1、回彈 1、影響回因素：如前述 2、滑移產生原因：（1）不對稱工件彎曲
沖壓原理及基本變形
2003.09.10
Page:2
塑性變形:材料在力F2作用下，由OA變形到OA2，除去外力，只能回復到OA2’，不能回復到OA，此時則產生塑性變形。（如圖） σ s為屈服極限, σb為強度極限
f
σs
沖壓原理及基本變形
材料拉伸曲線圖
σb
x
Page:3
2003.09.10
三、 1
沖孔
（2）沖孔面（見下圖）
落料
沖壓尺寸曲光面尺寸決定，不管是落料還是沖孔。
沖壓原理及基本變形
2003.09.10
Page:5
五、
間隙對沖裁質量影響：
T：料厚、Z：沖裁間隙 1，間隙合適，b=(1/3-1/2)T （如右圖）
2，間隙過大，b<1/5T 光面少，不易分離，（如右圖）
3，間隙過小，b>3/4T時，毛刺易掉，易產生銅絲（如右圖）
b
4, 變形
c
沖壓原理及基本變形
2003.09.10
Page:8
間隙對模具壽命影響：Z 受力F
磨損
在保証沖裁質量和尺寸前提下,Z 磨損。
越好
Z 受力F 標准間隙：銅材 3%－5%T，不鏽鋼板 5%－8%T 、八、刀口沖子研磨： A3鋼

机械专业英文翻译

机械专业英文翻译 Company number：【WTUT-WT88Y-W8BBGB-BWYTT-19998】启动轴 starting axle 启动齿轮starting gear启动棘轮 starting ratchet wheel 复位弹簧 restoring, pull back spring弹簧座 spring seating 摩擦簧friction spring推力垫圈 thrust washer 轴挡圈axle bumper ring下料 filling 切断 cut 滚齿机 gear-hobbing machine剪料机 material-shearingmachine车床 lathe 拉床broaching machine垂直度 verticality, verticalextent 平行度 parallelism同心度 homocentricity位置度 position拉伤 pulling damage碰伤 bumping damage缺陷 deficiency严重缺陷 severe deficiency摩擦力 friction 扭距 twist滑动 glide 滚动 roll打滑 skid 脱不开 can’t seperate不复位 can’t restore 直径 diameterM值 = 跨棒距 test rod span公法线 common normal line 弹性elasticity频率特性 frequency characteristic误差 error响应 response 定位 allocation 机床夹具 jig 动力学 dynamic运动学 kinematic静力学 static分析力学 analyse mechanics拉伸 pulling压缩 hitting机床 machine tool刀具 cutter摩擦 friction联结 link传动 drive/transmission轴 shaft剪切 shear扭转 twist弯曲应力 bending stress三相交流电 three-phase AC磁路 magnetic circles变压器 transformer异步电动机 asynchronous motor几何形状 geometrical精度 precision正弦形的 sinusoid交流电路 AC circuit机械加工余量 machining allowance变形力 deforming force变形 deformation电路 circuit半导体元件 semiconductor element拉孔 broaching装配 assembling加工 machining液压 hydraulic pressure切线 tangent机电一体化 mechanotronics mechanical-electrical integration稳定性 stability介质 medium液压驱动泵 fluid clutch 液压泵 hydraulic pump阀门 valve失效 invalidation强度 intensity载荷 load应力 stress安全系数 safty factor可靠性 reliability螺纹 thread螺旋 helix键 spline销 pin滚动轴承 rolling bearing滑动轴承 sliding bearing弹簧 spring制动器 arrester brake十字结联轴节 crosshead联轴器 coupling链 chain皮带 strap精加工 finish machining粗加工 rough machining变速箱体 gearbox casing腐蚀 rust氧化 oxidation磨损 wear耐用度 durability机械制图Mechanical drawing投影 projection视图 view剖视图 profile chart标准件 standard component零件图 part drawing装配图 assembly drawing尺寸标注 size marking技术要求technical requirements刚度 rigidity内力 internal force位移 displacement截面 section疲劳极限 fatigue limit断裂 fracture塑性变形 plastic distortion脆性材料 brittleness material刚度准则 rigidity criterion垫圈 washer垫片 spacer直齿圆柱齿轮straight toothed spur gear斜齿圆柱齿轮helical-spur gear直齿锥齿轮straight bevel gear运动简图 kinematic sketch齿轮齿条 pinion and rack蜗杆蜗轮 worm and worm gear虚约束 passive constraint曲柄 crank摇杆 racker凸轮 cams反馈 feedback发生器 generator直流电源 DC electrical source 门电路 gate circuit外圆磨削 external grinding内圆磨削 internal grinding平面磨削 plane grinding变速箱 gearbox离合器 clutch绞孔 fraising绞刀 reamer螺纹加工 thread processing螺钉 screw铣削 mill铣刀 milling cutter功率 power工件 workpiece齿轮加工 gear mechining齿轮 gear主运动 main movement主运动方向direction of main movement进给方向 direction of feed进给运动 feed movement合成进给运动resultant movement of feed合成切削运动resultant movement of cutting合成切削运动方向 directionof resultant movement of cutting 切削深度 cutting depth前刀面 rake face刀尖 nose of tool前角 rake angle后角 clearance angle龙门刨削 planing主轴 spindle主轴箱 headstock卡盘 chuck加工中心 machining center车刀 lathe tool车床 lathe镗削 bore集成电路 integrate circuit挡板 orifice plate残余应力 residual stress套筒 sleeve扭力 torsion 冷加工 cold machining电动机 electromotor汽缸 cylinder过盈配合 interference fit热加工 hotwork摄像头 CCD camera倒角 rounding chamfer优化设计 optimal design工业造型设计industrial moulding design有限元 finite element滚齿 hobbing插齿 gear shaping伺服电机 actuating motor铣床 milling machine钻床 drill machine镗床 boring machine步进电机 stepper motor丝杠 screw rod导轨 lead rail组件 subassembly可编程序逻辑控制器Programmable LogicController PLC毛坯 rough桁架 truss轴线 axes逻辑电路 logic circuit触发器 flip-flop脉冲波形 pulse shape数模 digital analogy液压传动机构fluid drive mechanism机械零件 mechanical parts产品突出特点ProductHighlights特别优惠 special offersAssembly line组装线Layout布置图Conveyer流水线物料板Rivet table拉钉机Rivet gun拉钉枪Screw driver起子Electric screw driver电动起子Pneumatic screw driver气动起子worktable 工作桌OOBA开箱检查fit together组装在一起fasten锁紧(螺丝)fixture 夹具(治具)pallet栈板barcode条码barcode scanner条码扫描器fuse together熔合fuse machine热熔机repair修理operator作业员QC品管supervisor 课长ME制造工程师MT制造生技cosmetic inspect外观检查inner parts inspect内部检查thumb screw大头螺丝lbs. inch镑、英寸EMI gasket导电条front plate前板rear plate后板chassis 基座bezel panel面板power button电源按键reset button重置键Hi-pot test of SPS高源高压测试Voltage switch of SPS电源电压接拉键sheet metal parts 冲件plastic parts塑胶件SOP制造作业程序material check list物料检查表work cell工作间trolley台车carton纸箱sub-line支线left fork叉车personnel resource department人力资源部production department生产部门planning department企划部QC Section品管科stamping factory冲压厂painting factory烤漆厂molding factory成型厂common equipment常用设备uncoiler and straightener整平机punching machine 冲床robot机械手hydraulic machine油压机lathe车床planer |'plein|刨床miller铣床grinder磨床driller床linear cutting线切割electrical sparkle电火花welder电焊机staker=reviting machine铆合机position职务president董事长general manager总经理special assistant manager特助factory director厂长department director部长deputy manager | =vice manager副理section supervisor课长deputy section supervisor =vice section superisor 副课长group leader/supervisor组长line supervisor线长assistant manager助理to move, to carry, to handle搬运be put in storage入库pack packing包装to apply oil擦油to file burr 锉毛刺final inspection终检to connect material接料to reverse material 翻料wet station沾湿台Tiana天那水cleaning cloth抹布to load material上料to unload material卸料to return material/stock to退料scraped |'skrpid|报废scrape ..v.刮;削deficient purchase来料不良manufacture procedure制程deficient manufacturing procedure制程不良oxidation |' ksi'dein|氧化scratch刮伤dents压痕defective upsiding down抽芽不良defective to staking铆合不良embedded lump镶块feeding is not in place送料不到位stamping-missing漏冲production capacity生产力education and training教育与训练proposal improvement提案改善spare parts=buffer备件forklift叉车trailer=long vehicle拖板车compound die合模die locker锁模器pressure plate=plate pinch压板bolt螺栓name of a department部门名称administration/general affairs dept总务部automatic screwdriver电动启子thickness gauge厚薄规gauge(or jig)治具power wire电源线buzzle蜂鸣器defective product label不良标签identifying sheet list标示单screwdriver holder起子插座pedal踩踏板stopper阻挡器flow board流水板hydraulic handjack油压板车forklift叉车pallet栈板glove(s)手套glove(s) with exposed fingers割手套missing part漏件wrong part错件excessive defects过多的缺陷critical defect极严重缺陷major defect主要缺陷minor defect次要缺陷not up to standard不合规格dimension/size is a little bigger尺寸偏大(小)cosmetic defect外观不良slipped screwhead/slippery screw head螺丝滑头slipped screwhead/shippery screw thread滑手speckle斑点mildewed=moldy=mouldy发霉rust生锈deformation变形burr(金属)flash(塑件)毛边poor staking铆合不良excesssive gap间隙过大grease/oil stains油污inclusion杂质qualified products, up-to-grade products良品defective products, not up-to-grade products不良品waste废料board看板feeder送料机sliding rack滑料架defective product box不良品箱die change 换模to fix a die装模to take apart a die拆模to repair a die修模packing material包材basket蝴蝶竺plastic basket胶筐isolating plate baffle plate; barricade隔板carton box纸箱to pull and stretch拉深to put material in place, to cut material, to input落料to impose lines压线to compress, compressing压缩character die字模to feed, feeding送料transportation运输(be)qualfied, up to grade合格not up to grade, not qualified不合格material change, stock change材料变更feature change 特性变更evaluation评估prepare for, make preparations for 准备parameters参数rotating speed, revolution转速manufacture management制造管理abnormal handling异常处理production unit生产单位lots of production生产批量steel plate钢板roll material卷料manufacture procedure制程vocabulary for stamping冲压常词汇stamping, press冲压punch press, dieing out press冲床uncoiler & strainghtener整平机feeder送料机rack, shelf, stack料架cylinder油缸robot机械手taker取料机conveyer belt输送带transmission rack输送架top stop上死点bottom stop下死点one stroke一行程inch寸动to continue, cont.连动to grip(material)吸料location lump, locating piece, block stop 定位块reset复位smoothly顺利dent压痕scratch刮伤deformation变形filings铁削to draw holes抽孔inquiry, search for查寻to stock, storage, in stock库存receive领取approval examine and verify审核processing, to process加工delivery, to deliver 交货to return delivenry to.to send delinery backto retrn of goods退货registration登记registration card登记卡to control管制to put forward and hand in提报safe stock安全库存acceptance = receive验收to notice通知application form for purchase请购单consume, consumption消耗to fill in填写abrasion磨损die 模具figure file, chart file图档cutting die, blanking die冲裁模progressive die, follow (-on)die连续模compound die复合模punched hole冲孔panel board镶块to cutedges=side cut=side scrap切边to bending折弯to pull, to stretch拉伸Line streching, line pulling线拉伸engraving, to engrave刻印upsiding down edges翻边to stake铆合designing, to design设计design modification设计变化die block模块folded block折弯块sliding block滑块location pin定位销lifting pin顶料销die plate, front board模板padding block垫块stepping bar垫条upper die base上模座lower die base下模座upper supporting blank上承板upper padding plate blank上垫板spare dies模具备品spring 弹簧bolt螺栓document folder文件夹file folder资料夹to put file in order整理资料spare tools location手工备品仓first count初盘人first check初盘复棹人second count 复盘人second check复盘复核人equipment设备waste materials废料plain die简易模pierce die冲孔模forming die成型模progressive die连续模gang dies复合模shearing die剪边模riveting die铆合模pierce冲孔forming成型(抽凸,冲凸)draw hole抽孔bending折弯trim切边emboss凸点dome凸圆semi-shearing半剪stamp mark冲记号deburr or coin压毛边punch riveting冲压铆合side stretch侧冲压平reel stretch卷圆压平groove压线blanking下料stamp letter冲字(料号)shearing剪断tick-mark nearside正面压印tick-mark farside反面压印冲压名称类extension dwg展开图procedure dwg工程图die structure dwg模具结构图material材质material thickness料片厚度factor系数upward向上downward向下press specification冲床规格die height range适用模高die height闭模高度burr毛边gap间隙weight重量total wt.总重量punch wt.上模重量五金零件类inner guiding post内导柱inner hexagon screw内六角螺钉dowel pin固定销coil spring弹簧lifter pin顶料销eq-height sleeves=spool等高套筒pin销lifter guide pin浮升导料销guide pin导正销wire spring圆线弹簧outer guiding post外导柱stop screw止付螺丝located pin定位销outer bush外导套模板类top plate上托板（顶板）top block上垫脚punch set上模座punch pad上垫板punch holder上夹板stripper pad脱料背板up stripper上脱料板male die公模(凸模)feature die公母模female die母模(凹模)upper plate上模板lower plate下模板die pad下垫板die holder下夹板die set下模座bottom block下垫脚bottom plate下托板(底板) stripping plate内外打(脱料板) outer stripper外脱料板inner stripper内脱料板lower stripper下脱料板零件类punch冲头insert入块(嵌入件)deburring punch压毛边冲子groove punch压线冲子stamped punch字模冲子round punch圆冲子special shape punch异形冲子bending block折刀roller滚轴baffle plate挡块located block定位块supporting block for location定位支承块air cushion plate气垫板air-cushion eject-rod气垫顶杆trimming punch切边冲子stiffening rib punch = stinger 加强筋冲子ribbon punch压筋冲子reel-stretch punch卷圆压平冲子guide plate定位板sliding block滑块sliding dowel block滑块固定块active plate活动板lower sliding plate下滑块板upper holder block上压块upper mid plate上中间板spring box弹簧箱spring-box eject-rod弹簧箱顶杆spring-box eject-plate弹簧箱顶板bushing bolck衬套cover plate盖板guide pad导料块barreling 滚光加工 belling 压凸加工bending 弯曲加工 blanking 下料加工bulging 撑压加工 burring 冲缘加工cam die bending 凸轮弯曲加工caulking 合加工coining 压印加工 compressing 压缩加工compression bending 押弯曲加工crowning 凸面加工curl bending 卷边弯曲加工curling 卷曲加工cutting 切削加工 dinking 切断蕊骨double shearing 叠板裁断 drawing 引伸加工drawing with ironing 抽引光滑加工 embossing 浮花压制加工extrusion 挤制加工 filing 锉削加工fine blanking 精密下料加工 finish blanking 光制下料加工finishing 精整加工 flanging 凸缘加工folding 折边弯曲加工 folding 摺叠加工forming 成形加工 impact extrusion 冲击挤压加工indenting 压痕加工 ironing 引缩加工knurling 滚花 lock seaming 固定接合louvering 百叶窗板加工 marking 刻印加工necking 颈缩加工 notching 冲口加工parting 分断加工 piercing 冲孔加工progressive bending 连续弯曲加工 progressiveblanking 连续下料加工progressive drawing 连续引伸加工 progressiveforming 连续成形加工reaming 铰孔加工 restriking 二次精冲加工riveting 接加工 roll bending 滚筒弯曲加工roll finishing 滚压加工 rolling 压延加工roughing 粗加工 scrapless machining 无废料加工seaming 折弯重叠加工 shaving 缺口修整加工shearing 切断加工 sizing 精压加工/矫正加工slitting 割缝加工 spinning 卷边接staking 固 stamping 锻压加工swaging 挤锻压加工 trimming 整缘加工upsetting 锻粗加工 wiring 抽线加工冲压机械及周边关连用语back shaft 支撑轴 blank determination 胚料展开bottom slide press 下传动式压力机 board drophammer 板落锤brake 煞车 buckle 剥砂面camlachie cramp 铸包 casting on flat 合chamotte sand 烧磨砂 charging hopper 加料漏斗clearance 间隙 closed-die forging 合模锻造clump 夹紧 clutch 离合器clutch brake 离合器制动器 clutch boss 离合器轮壳clutch lining 离合器覆盖 coil car 带卷升降运输机coil cradle 卷材进料装置 coil reel stand 钢材卷料架column 圆柱 connection screw 连杆调节螺钉core compound 砂心黏结剂 counter blow hammer 对击锻锤cradle 送料架 crank 曲柄轴crankless 无曲柄式 cross crank 横向曲轴cushion 缓冲 depression 外缩凹孔dial feed 分度送料 die approach 模口角度die assembly 合模 die cushion 模具缓冲垫die height 冲压闭合高度 die life 模具寿命die opening 母模逃孔 die spotting press 调整冲模用压力机double crank press 双曲柄轴冲床 draght angle 逃料倾斜角edging 边锻伸 embedded core 加装砂心feed length 送料长度 feed level 送料高度filling core 埋入砂心 filling in 填砂film play 液面花纹 fine blanking press 精密下料冲床forging roll 辊锻机 finishing slag 炼後熔渣fly wheel 飞轮 fly wheel brake 飞轮制动器foot press 脚踏冲床 formboard 进模口板frame 床身机架 friction 摩擦friction brake 摩擦煞车 gap shear 凹口剪床gear 齿轮 gib 滑块引导部gripper 夹具 gripper feed 夹持进料gripper feeder 夹紧传送装置 hammer 槌机hand press 手动冲床 hand rack pinion press 手动齿轮齿条式冲床hand screw press 手动螺旋式冲床 hopper feed 料斗送料idle stage 空站 inching 微调尺寸isothermal forging 恒温锻造 key clutch 键槽离合器knockout 脱模装置 knuckle mechanic 转向机构land 模具直线刀面部 level 水平loader 供料器 unloader 卸料机loop controller 闭回路控制器 lower die 下模micro inching device 微寸动装置 microinching equipment 微动装置motor 马达 moving bolster 活动工作台notching press 冲缺口压力机 opening 排料逃孔overload protection device 防超载装置 pinch roll 导正滚轮pinion 小齿轮 pitch 节距pressfit 压入 progressive 连续送料pusher feed 推杆式送料 pusher feeder 料片押片装置quick die change system 快速换模系统 regrinding 再次研磨releasing 松释动作 reversedblanking 反转下料robot 机器人 roll formingmachine 辊轧成形roll forming machine 辊轧成形机roll release 脱辊roller feed 辊式送料 roller leveler辊式矫直机rotary bender 卷弯成形机 safetyguard 安全保护装置scrap cutter 废料切刀 scrap press废料冲床seamless forging 无缝锻造separate 分离shave 崩砂 shear angle 剪角sheet loader 薄板装料机 shot 单行程工作shrinkage fit 收缩配合 shutheight 闭合高度sieve mesh 筛孔 sintering of sand铸砂烧贴slide balancer 滑动平衡器 slughole 逃料孔spin forming machine 旋压成形机 spotting 合模stack feeder 堆叠拨送料机stickness 黏模性straight side frame 冲床侧板stretcher leveler 拉伸矫直机strip feeder 料材送料装置stripping pressure 弹出压力stroke 冲程 take out device 取料装置toggle press 肘杆式压力机transfer 传送transfer feed 连续自动送料装置turrent punch press 转塔冲床two speed clutch 双速离合器uncoiler 闭卷送料机unloader 卸载机 vibration feeder振动送料机wiring press 嵌线卷边机业务与贸易关连用语accept order 接受订货 account 帐户after service 售后服务 amendment 修正annual sales 年销售额 at sight 见票即付balance 余额 bank draft 汇票bargain goods 廉价品 batch 批次bid 出价 bid sales 投标买卖bill of landing 提单 bills receivable 应收票据brand 品牌 bulk cargo 散装货business transaction 商业交易 buyer 买方carbon copy 打字副本 cargo collection 揽货carton 纸箱 cash in advance 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【机械类文献翻译】冲压变形

英文原文Categories of stamping formingMany deformation processes can be done by stamping, the basic processes of the stamping can be divided into two kinds: cutting and forming.Cutting is a shearing process that one part of the blank is cut form the other .It mainly includes blanking, punching, trimming, parting and shaving, where punching and blanking are the most widely used. Forming is a process that one part of the blank has some displacement form the other. It mainly includes deep drawing, bending, local forming, bulging, flanging, necking, sizing and spinning.In substance, stamping forming is such that the plastic deformation occurs in the deformation zone of the stamping blank caused by the external force. The stress state and deformation characteristic of the deformation zone are the basic factors to decide the properties of the stamping forming. Based on the stress state and deformation characteristics of the deformation zone, the forming methods can be divided into several categories with the same forming properties and to be studied systematically.The deformation zone in almost all types of stamping forming is in the plane stress state. Usually there is no force or only small force applied on the blank surface. When it is assumed that the stress perpendicular to the blank surface equal to zero, two principal stresses perpendicular to each other and act on the blank surface produce the plastic deformation of the material. Due to the small thickness of the blank, it is assumed approximately that the two principal stresses distribute uniformly along the thickness direction. Based on this analysis, the stress state and the deformation characteristics of the deformation zone in all kind of stamping forming can be denoted by the point in the coordinates of the plane principal stress(diagram of the stamping stress) and the coordinates of the corresponding plane principal stains (diagram of the stamping strain). The different points in the figures of the stamping stress and strain possess different stress state and deformation characteristics.(1)When the deformation zone of the stamping blank is subjected toplanetensile stresses, it can be divided into two cases, that is σγ>σθ>0,σt=0andσθ>σγ>0,σt=0.In both cases, the stress with the maximum absolute value is always a tensile stress. These two cases are analyzed respectively as follows.2)In the case that σγ>σθ>0andσt=0, according to the integral theory, the relationships between stresses and strains are:εγ/（σγ-σm）=εθ/（σθ-σm）=εt/（σt -σm）=k 1.1where, εγ，εθ，εt are the principal strains of the radial, tangential and thickness directions of the axial symmetrical stamping forming; σγ，σθand σt are the principal stresses of the radial, tangentialand thickness directions of the axial symmetrical stamping forming;σm is the average stress,σm=（σγ+σθ+σt）/3; k is a constant.In plane stress state, Equation 1.13εγ/（2σγ-σθ）=3εθ/（2σθ-σt）=3εt/[-（σt+σθ）]=k 1.2Since σγ>σθ>0,so 2σγ-σθ>0 and εθ>0.It indicates that in plane stress state with two axial tensile stresses, if the tensile stress with the maximum absolute value is σγ, the principal strain in this direction must be positive, that is, the deformation belongs to tensile forming.In addition, because σγ>σθ>0，therefore -（σt+σθ）<0 and εt<0. The strain in the thickness direction of the blankεt is negative, that is, the deformation belongs to compressive forming, and the thickness decreases.The deformation condition in the tangential direction depends on the values ofσγand σθ. When σγ=2σθ,εθ=0；when σγ>2σθ,εθ<0；and when σγ<2σθ,εθ>0.The range of σθis σγ>=σθ>=0 . In the equibiaxial tensile stress state σγ=σθ，according to Equation 1.2,εγ=εθ>0 and εt<0 . In the uniaxial tensile stress stateσθ=0，according to Equation 1.2 εθ=-εγ/2.According to above analysis, it is known that this kind of deformation condition is in the region AON of the diagram of the diagram of the stamping strain (see Fig .1.1), and in the region GOH of the diagram of the stamping stress (see Fig.1.2).2)When σθ>σγ>0 and σt=0, according to Equation 1.2 , 2σθ>σγ>0 and εθ>0,This result shows that for t he plane stress state with two tensile stresses, when the absoluste value of σθ is the strain in this direction must be positive, that is, it must be in the state of tensile forming.Also becauseσγ>σθ>0，therefore -（σt+σθ）<0 and εt<0. The strain in the thickness direction of the blankεt is negative, or in the state of compressive forming, and the thickness decreases.The deformation condition in the radial direction depends on the values ofσγand σθ. When σθ=2σγ,εγ0;when σθ>σγ,εγ<0;and when σθ<2σγ,εγ>0.The range of σγis σθ>= σγ>=0 .When σγ=σθ,εγ=εθ>0, that is, in equibiaxial tensile stress state, the tensile deformation with the same values occurs in the two tensile stress directions; when σγ=0, εγ=-εθ /2, that is, in uniaxial tensile stress state, the deformation characteristic in this case is the same as that of the ordinary uniaxial tensile.This kind of deformation is in the region AON of the diagram of the stamping strain (see Fig.1.1), and in the region GOH of the diagram of the stamping stress (see Fig.1.2).Between above two cases of stamping deformation, the properties ofσθandσγ, and the deformation caused by them are the same, only the direction of the maximum stress is different. These two deformations are same for isotropic homogeneous material.(1)When the deformation zone of stamping blank is subjected to two compressive stressesσγandσθ(σt=0), it can also be divided into two cases, which are σγ<σθ<0,σt=0 and σθ<σγ<0,σt=0.1）When σγ<σθ<0 and σt=0, according to Equation 1.2, 2σγ-σθ<0与εγ=0.This result showsthat in the plane stress state with two compressive stresses, if the stress with the maximum absolute value is σγ<0, the strain in this direction must be negative, that is, in the state of compressive forming.Also because σγ<σθ<0, therefore -（σt+σθ）>0 and εt>0.The strain in the thickness direction of the blankεt is positive, and the thickness increases.The deformation condition in the tangential direction depends on the values ofσγand σθ.When σγ=2σθ,εθ=0;when σγ>2σθ,εθ<0;and when σγ<2σθ,εθ>0.The r ange of σθis σγ<σθ<0.When σγ=σθ,it is in equibiaxial tensile stress state, henceεγ=εθ<0; when σθ=0,it is in uniaxial tensile stress state, hence εθ=-εγ/2.This kind of deformation condition is in the region EOG of the diagram of the stamping strain (see Fig.1.1), and in the region COD of the diagram of the stamping stress (see Fig.1.2).2）When σθ<σγ<0and σt=0, according to Equation 1.2,2σθ-σγ<0 and εθ<0. This result shows that in the plane stress state with two compressive stresses, if the stress with the maximum absolute value is σθ, the strain in this direction must be negative, that is, in the state of compressive forming.Also becauseσθ<σγ <0 , therefore -（σt+σθ）>0 and εt>0.The strain in the thickness direction of the blankεt is positive, and the thickness increases.The deformation condition in the radial direction depends on the values ofσγand σθ. When σθ=2σγ, εγ=0; when σθ>2σγ,εγ<0; and when σθ<2σγ,εγ>0.The range of σγis σθ<= σγ<=0 . When σγ=σθ , it is in equibiaxial tensile stress state, hence εγ=εθ<0; when σγ=0, it is in uniaxial tensile stress state, hence εγ=-εθ/2>0.This kind of deformation is in the region GOL of the diagram of the stamping strain (see Fig.1.1), and in the region DOE of the diagram of the stamping stress (see Fig.1.2).(3) The deformation zone of the stamping blank is subjected to two stresses with opposite signs, and the absolute value of the tensile stress is larger than that of the compressive stress. There exist two cases to be analyzed as follow:1)When σγ>0, σθ<0 an d |σγ|>|σθ|, according to Equation 1.2, 2σγ-σθ>0 and εγ>0.This result shows that in the plane stress state with opposite signs, if the stress with the maximum absolute value is tensile, the strain in the maximum stress direction is positive, that is, in the state of tensile forming.Also because σγ>0, σθ<0 and |σγ|>|σθ|, therefore εθ<0. The strain in the compressive stress direction is negative, that is, in the state of compressive forming.The range of σθis 0>=σθ>=-σγ. When σθ=-σγ, then εγ>0,εθ<0 , and |εγ|=|εθ|;when σθ=0, then εγ>0,εθ<0, and εθ=-εγ/2, it is the uniaxial tensile stress state. This kind of deformation condition is in the region MON of the diagram of the stamping strain (see Fig.1.1), and in the region FOG of the diagram of the stamping stress (see Fig.1.2).2)When σθ>0, σγ<0,σt=0 and |σθ|>|σγ|, according to Equation 1.2, bymeans of the same analysis mentioned above, εθ>0, that is, the deformation zone is in the planestress state with opposite signs. If the stress with the maximum absolut e value is tensile stress σθ, the strain in this direction is positive, that is, in the state of tensile forming. The strain in the radial direction is negative （εγ<=0）, that is, in the state of compressive forming.The range of σγis 0>=σγ>=-σθ. When σγ=-σθ, then εθ>0,εγ<0 and |εγ|=|εθ|; when σγ=0, then εθ>0,εγ<0, andεγ=-εθ /2. This kind of deformation condition is in the region COD of the diagram of the stamping strain (see Fig.1.1), and in the region AOB of the diagram of the stamping stress (see Fig.1.2).Although the expressions of these two cases are different, their deformation essences are the same.(4) The deformation zone of the stamping blank is subjected to two stresses with opposite signs, and the absolute value of the compressive stress is larger than that of the tensile stress. There exist two cases to be analyzed as follows:1)When σγ>0,σθ<0 and |σθ|>|σγ|, according to Equation 1.2, 2σθ- σγ<0 and εθ<0.This result shows that in plane stress state with opposite signs, if the stress with the maximum absolute value is compressive stress σθ, the strain in this direction is negative, or in the state of compressive forming.Also because σγ>0 and σθ<0, therefore 2σγ- σθ<0 and εγ>0. The strain in the tensile stress direction is positive, or in the state of tensile forming.The range of σγis 0>=σγ>=-σθ.When σγ=-σθ, then εγ>0,εθ<0, and εγ=-εθ;when σγ=0, then εγ>0,εθ<0, and εγ=-εθ/2. This kind of deformation is in the region LOM of the diagram of the stamping strain (see Fig.1.1), and in the region EOF of the diagram of the stamping stress (see Fig.1.2).2)When σθ>0, σγ<0 and |σγ|>|σθ|, according to Equation 1.2 and by means of the same analysis mentioned above,εγ< 0.This result shows that in plane stress state with opposite signs, if the stress with the maximum absolute value is compressive stress σγ,the strain in this direction is negative, or in the state of compressive forming, The strain in the tensile stress direction is positive, or in the state of tensile forming.The range of σθis 0>=σθ>=-σγ.When σθ=-σγ, then εθ>0,εγ<0, and εθ=-εγ;when σθ=0, then εθ>0,εγ<0, and εθ=-εγ/2. Such deformation is in the region DOF of the diagram of the stamping strain (see Fig.1.1), and in the region BOC of the diagram of the stamping stress (see Fig.1.2).The four deformation conditions are related to the corresponding stamping forming methods. Their relationships are labeled with letters in Fig.1.1 and Fig.1.2.The four deformation conditions analyzed above are applicable to all kinds of plane stress states, that is, the four deformation conditions can sum up all kinds of stamping forming in to two types, tensile and compressive. When the stress with the maximum absolute value in the deformation zone of the stamping blank is tensile, the deformation along this stress direction must be tensile. Such stamping deformation is called tensile forming. Based on above analysis, the tensile forming occupies five regions MON, AON, AOB, BOC and COD in the diagram of thestamping stain; and four regions FOG, GOH, AOH and AOB in the diagram of the stamping stress.When the stress with the maximum absolute value in the deformation zone of the stamping blank is compressive, the deformation along this stress direction must be compressive. Such stamping deformation is called compressive forming. Based on above analysis, the compressive forming occupies five regions LOM, HOL, GOH, FOG and DOF in the diagram of the stamping strain; and four regions EOF, DOE, COD and BOC in the diagram of the stamping stress.MD and FB are the boundaries of the two types of forming in the diagrams of the stamping strain and stress respectively. The tensile forming is located in the top right of the boundary, and the compressive forming is located in the bottom left of the boundary.Because the stress produced by the plastic deformation of the material is related to the strain caused by the stress, there also exist certain relationships between the diagrams of the stamping stress and strain. There are corresponding locations in the diagrams of the stamping stress and strain for every stamping deformation. According to the state of stress or strain in the deformation zone of the forming blank, and using the boundary line in the diagram of the stamping stress MD or the boundary line in the diagram of the stamping strain FB, it is easy to know the properties and characteristics of the stamping forming.The locations in the diagrams of the stamping stress and strain for various stress states and the corresponding relationships of the two diagrams are listed in Table 1.1.It shows that the geometrical location for every region are different in the diagrams of the stamping stress and strain, but their sequences in the two diagrams are the same. One key point is that the boundary line between the tensile and the compressive forming is an inclined line at 45°to the coordinate axis. The characteristics of the stamping technique for tensile and compressive forming are listed in Table 1.2.Table 1.2 clearly shows that in the deformation zone of the blank, the characteristics of the force and deformation, and the patterns relevant to the deformation for each stamping method are the same. Therefore, in addition to the research on the detail stamping method, it is feasible to study stamping systematically and comprehensively. The characteristic of the systematic research is to study the common principle of all different types of stamping methods. The results of the systematic research are applicable to all stamping methods. The research on the properties and limit of the sheet metal stamping has been carried out in certain extent. The contents of the research on the stamping forming limit by using systematic method are shown in Fig.1.3.Table 1.1 Comparison between states of stress and strain in stamping Table 1.2 Comparison between tensile and compressive formingFig.1.1 Diagram of stampingstraint en s i l e f o r m i n g b ul g i n g d e e p d r a w i n gf l a ng i n gc om p r e s s i v e f o r m i n g c om p r e s s i v e f o r m i n g e x p a n d i n gd e e p d r a w i n gb ul g i n g t e n s i l e f o r m i n g n e c k i n g n e c k i n g expan ding+εγ-εγ-εθ+εθπ/4π/4f l a ng i n g -σγ+σθ+σγ-σθFig.1.2 Diagram of stamping stress机械专业中英文文献翻译Tensile forming Compressionforming Strength Capability of anti-wrinkle under the tensile and compressive stresses PlasticityCapability ofanti-neckingDeformationuniformity andextensioncapabilityPlasticityCapability ofanti-wrinkleDeformationforce and itsAnisotropy value of rHardening characteristicsDeformation resistanceChemistry componentStructureDeformation conditionsHardening characteristicsState of stressGradient of strainHardening characteristicsDie shapeMechanical proertyThe value of the n and rRelative thicknessChemistry componentStructureDeformation conditionsFig.1.3 Examples for systematic research methods中文译文冲压变形冲压变形工艺可完成多种工序，其基本工序可分为分离工序和变形工序两大类。

【机械类文献翻译】冲压成形特点与板材冲压成形性能

Characteristics of Stamping and Properties of Sheet MetalFormingStamping is a kind of plastic forming process in which a part is produced by means of the plastic forming of the material under the action of a die．Stamping is usually carried out under cold state,so it is also called cold stamping.Heat stamping is used only when the blank thickness is greater than 8～1 00mm.The blank material for stamping is usually in the from sheet or strip,and therefore it is also called sheet metal forming.Some non—metal sheets(such as plywood,mica sheet,asbestos,leather)can also be formed by stamping.Stamping is widely used in various of the metalworking industry, and it plays a crucial role in the industries for manufacturing automobiles, instruments,military parts and household electrical appliances,etc.The process，equipment and die are the three foundational problems that needed t0 be studied in stamping.The characteristics of the sheet metal forming are as follows:(1)High material utilization.(2)Capacity to produce thin—walled parts of complex shape.(3)Good interchangeability between stamping parts due to precision in shape and dimension.(4)Parts with lightweight，high—strength and fine rigidity can be obtained.(5)High productivity,easy to operate and to realize mechanization and automatizationThe manufacture of the stamping die is costly,and therefore it only fits t0 mass production.For the manufacture of products in small batch and rich variety,the simple stamping die and the new equipment such as a stamping machining center,are usually adopted to meet he market demands.The materials for sheet metal stamping include mi ld steel,copper,aluminum,magnesium alloy and high-plasticity alloy—steel,etc.Stamping equipment includes plate shear and punching press.The former shears plate into strips with a definite width,which would be pressed later.The later can be used both in shearing and forming.1.1 Characteristics of stamping formingThere are various processes of stamping forming with different working patterns and names．But these processes are similar to each other in plastic deformation．There are following conspicuous characteristics in stamping：(1)The force per unit area perpendicular to the blank surface is not large but is enough tocause the material plastic deformation．I t is much less than the inner stresses on the plate plane directions．In most cases stamping forming can be treated approximately as that of the plane stress state to simplify vastly the theoretical analysis and the calculation of the process parameters．(2)Due to the small relative thickness，the anti-instability capability of the blank is weak under compressive stress．As a result，the stamping process is difficult to proceed successfully without using the anti-instability device(such as blank holder)．Therefore the variety of the stamping processes dominated by tensile stress are more than those dominated by compressive stress．(3)During stamping forming，the Inner stress of the blank is equal to or sometimes less than the yield stress of the material．In this point，the stamping is different from the bulk forming.During stamping forming，the influence of the hydrostatic pressure of the stress state in the deformation zone to the forming limit and the def6nmation resistance is not so important as to the bulk forming．In some circumstances，such influence may be neglected．Even in the case when this influence should be considered，the treating meth()d is also different from that of bulk forming.(4)In stamping forming，the restrain action of the die to the blank is not severe as in the case of the bulk forming(such as die forging)．In bulk forming，the constraint forming is proceeded by the die with exactly the same shape of the part．Whereas in stamping，in most cases，the blank has a certain degree of freedom，only one surface of the blank contacts with the die．In some extra cases，such as the forming of the suspended region of sphere or cone，and curling at the end of tube，neither sides of the blank on the deforming zone con-tact with the die．The deformation in these regions are caused and controlled the die applying an external force to its adjacent area.Due to the characteristics of stamping deformation and mechanics mentioned above，the stamping technique is different from the bulk metal forming：(1)The importance of the strength and rigidity of the die in stamping forming is less than that in bulk forming because the blank can be formed without applying large pressure unit area on its surface．Instead，the techniques of the simple die and the pneumatic and hydraulic forming are developed.(2)Due to the plane stress or simple strain state in comparison with bulk forming，more research on deformation or force and power parameters has been done．Stamping forming can be performed by more reasonable scientific methods．Based on the real time measurement and analysis on the sheet metal properties and stamping parameters．by means of computer and some modem testing apparatus research on the intellectualized control of stamping process isalso in proceeding ．(3)It is shown that there is a close relationship between stamping forming and raw material-The research on the properties of the stamping forming ，that is ，forming ab1ityand shape stability ．has become a key point in stamping technology ．The research on the properties of the sheet metal stamping not only meets the need of the stamping technology development ，but also enhances the manufacturing technique of iron and steel industry 。

冲压模具成型外文翻译参考文献

冲压模具成型外文翻译参考文献(文档含中英文对照即英文原文和中文翻译)4 Sheet metal forming and blanking4.1 Principles of die manufacture4.1.1 Classification of diesIn metalforming,the geometry of the workpiece is established entirely or partially by the geometry of the die.In contrast to machining processes,ignificantly greater forces are necessary in forming.Due to the complexity of the parts,forming is often not carried out in a single operation.Depending on the geometry of the part,production is carried out in several operational steps via one or several production processes such as forming or blanking.One operation can also include several processes simultaneously(cf.Sect.2.1.4).During the design phase,the necessary manufacturing methods as well as the sequence and number of production steps are established in a processing plan(Fig.4.1.1).In this plan,theavailability of machines,the planned production volumes of the part and other boundary conditions are taken into account.The aim is to minimize the number of dies to be used while keeping up a high level of operational reliability.The parts are greatly simplified right from their design stage by close collaboration between the Part Design and Production Departments in order to enable several forming and related blanking processes to be carried out in one forming station.Obviously,the more operations which are integrated into a single die,the more complex the structure of the die becomes.The consequences are higher costs,a decrease in output and a lower reliability.Fig.4.1.1 Production steps for the manufacture of an oil sumpTypes of diesThe type of die and the closely related transportation of the part between dies is determined in accordance with the forming procedure,the size of the part in question and the production volume of parts to be produced.The production of large sheet metal parts is carried out almost exclusively using single sets of dies.Typical parts can be found in automotive manufacture,the domestic appliance industry and radiator production.Suitable transfer systems,for example vacuum suction systems,allow the installation of double-action dies in a sufficiently large mounting area.In this way,for example,the right and left doors of a car can be formed jointly in one working stroke(cf.Fig.4.4.34).Large size single dies are installed in large presses.The transportation of the parts from oneforming station to another is carried out mechanically.In a press line with single presses installed one behind the other,feeders or robots can be used(cf.Fig.4.4.20 to 4.4.22),whilst in large-panel transfer presses,systems equipped with gripper rails(cf.Fig.4.4.29)or crossbar suction systems(cf.Fig.4.4.34)are used to transfer the parts.Transfer dies are used for the production of high volumes of smaller and medium size parts(Fig.4.1.2).They consist of several single dies,which are mounted on a common base plate.The sheet metal is fed through mostly in blank form and also transported individually from die to die.If this part transportation is automated,the press is called a transfer press.The largest transfer dies are used together with single dies in large-panel transfer presses(cf.Fig.4.4.32).In progressive dies,also known as progressive blanking dies,sheet metal parts are blanked in several stages;generally speaking no actual forming operation takes place.The sheet metal is fed from a coil or in the form of metal ing an appropriate arrangement of the blanks within the available width of the sheet metal,an optimal material usage is ensured(cf.Fig.4.5.2 to 4.5.5). The workpiece remains fixed to the strip skeleton up until the laFig.4.1.2 Transfer die set for the production of an automatic transmission for an automotive application-st operation.The parts are transferred when the entire strip is shifted further in the work flow direction after the blanking operation.The length of the shift is equal to the center line spacing of the dies and it is also called the step width.Side shears,very precise feeding devices or pilot pins ensure feed-related part accuracy.In the final production operation,the finished part,i.e.the last part in the sequence,is disconnected from the skeleton.A field of application for progressive blanking tools is,for example,in the production of metal rotors or stator blanks for electric motors(cf.Fig.4.6.11 and 4.6.20).In progressive compound dies smaller formed parts are produced in several sequential operations.In contrast to progressive dies,not only blanking but also forming operations areperformed.However, the workpiece also remains in the skeleton up to the last operation(Fig.4.1.3 and cf.Fig.4.7.2).Due to the height of the parts,the metal strip must be raised up,generally using lifting edges or similar lifting devices in order to allow the strip metal to be transported mechanically.Pressed metal parts which cannot be produced within a metal strip because of their geometrical dimensions are alternatively produced on transfer sets.Fig.4.1.3 Reinforcing part of a car produced in a strip by a compound die setNext to the dies already mentioned,a series of special dies are available for special individual applications.These dies are,as a rule,used separately.Special operations make it possible,however,for special dies to be integrated into an operational Sequence.Thus,for example,in flanging dies several metal parts can be joined together positively through the bending of certain metal sections(Fig.4.1.4and cf.Fig.2.1.34).During this operation reinforcing parts,glue or other components can be introduced.Other special dies locate special connecting elements directly into the press.Sorting and positioning elements,for example,bring stamping nuts synchronised with the press cycles into the correct position so that the punch heads can join them with the sheet metal part(Fig.4.1.5).If there is sufficient space available,forming and blanking operations can be carried out on the same die.Further examples include bending,collar-forming,stamping,fine blanking,wobble blanking and welding operations(cf.Fig.4.7.14 and4.7.15).Fig.4.1.4 A hemming dieFig.4.1.5 A pressed part with an integrated punched nut4.1.2 Die developmentTraditionally the business of die engineering has been influenced by the automotive industry.The following observations about the die development are mostly related to body panel die construction.Essential statements are,however,made in a fundamental context,so that they are applicable to all areas involved with the production of sheet-metal forming and blanking dies.Timing cycle for a mass produced car body panelUntil the end of the 1980s some car models were still being produced for six to eight years more or less unchanged or in slightly modified form.Today,however,production time cycles are set for only five years or less(Fig.4.1.6).Following the new different model policy,the demands ondie makers have also changed prehensive contracts of much greater scope such as Simultaneous Engineering(SE)contracts are becoming increasingly common.As a result,the die maker is often involved at the initial development phase of the metal part as well as in the planning phase for the production process.Therefore,a muchbroader involvement is established well before the actual die development is initiated.Fig.4.1.6 Time schedule for a mass produced car body panelThe timetable of an SE projectWithin the context of the production process for car body panels,only a minimal amount of time is allocated to allow for the manufacture of the dies.With large scale dies there is a run-up period of about 10 months in which design and die try-out are included.In complex SE projects,which have to be completed in 1.5 to 2 years,parallel tasks must be carried out.Furthermore,additional resources must be provided before and after delivery of the dies.These short periods call for pre-cise planning,specific know-how,available capacity and the use of the latest technological and communications systems.The timetable shows the individual activities during the manufacturing of the dies for the production of the sheet metal parts(Fig.4.1.7).The time phases for large scale dies are more or less similar so that this timetable can be considered to be valid in general.Data record and part drawingThe data record and the part drawing serve as the basis for all subsequent processing steps.They describe all the details of the parts to be produced. The information given in theFig.4.1.7 Timetable for an SE projectpart drawing includes: part identification,part numbering,sheet metal thickness,sheet metal quality,tolerances of the finished part etc.(cf.Fig.4.7.17).To avoid the production of physical models(master patterns),the CAD data should describe the geometry of the part completely by means of line,surface or volume models.As a general rule,high quality surface data with a completely filleted and closed surface geometry must be made available to all the participants in a project as early as possible.Process plan and draw developmentThe process plan,which means the operational sequence to be followed in the production of the sheet metal component,is developed from the data record of the finished part(cf.Fig.4.1.1).Already at this point in time,various boundary conditions must be taken into account:the sheet metal material,the press to be used,transfer of the parts into the press,the transportation of scrap materials,the undercuts as well as thesliding pin installations and their adjustment.The draw development,i.e.the computer aided design and layout of the blank holder area of the part in the first forming stage–if need bealso the second stage–,requires a process planner with considerable experience(Fig.4.1.8).In order to recognize and avoid problems in areas which are difficult to draw,it is necessary to manufacture a physical analysis model of the draw development.With this model,theforming conditions of the drawn part can be reviewed and final modifications introduced,which are eventually incorporated into the data record(Fig.4.1.9).This process is being replaced to some extent by intelligent simulation methods,through which the potential defects of the formed component can be predicted and analysed interactively on the computer display.Die designAfter release of the process plan and draw development and the press,the design of the die can be started.As a rule,at this stage,the standards and manufacturing specifications required by the client must be considered.Thus,it is possible to obtain a unified die design and to consider the particular requests of the customer related to warehousing of standard,replacement and wear parts.Many dies need to be designed so that they can be installed in different types of presses.Dies are frequently installed both in a production press as well as in two different separate back-up presses.In this context,the layout of the die clamping elements,pressure pins and scrap disposal channels on different presses must be taken into account.Furthermore,it must be noted that drawing dies working in a single-action press may be installed in a double-action press(cf.Sect.3.1.3 and Fig.4.1.16).Fig.4.1.8 CAD data record for a draw developmentIn the design and sizing of the die,it is particularly important to consider the freedom of movement of the gripper rail and the crossbar transfer elements(cf.Sect.4.1.6).These describe the relative movements between the components of the press transfer system and the die components during a complete press working stroke.The lifting movement of the press slide,the opening and closing movements of the gripper rails and the lengthwise movement of the whole transfer are all superimposed.The dies are designed so that collisions are avoided and a minimum clearance of about 20 mm is set between all the moving parts.4 金属板料的成形及冲裁4. 模具制造原理4.1.1模具的分类在金属成形的过程中，工件的几何形状完全或部分建立在模具几何形状的基础上的。

【机械类文献翻译】冲压模具的受力分析

英文原文Stress Analysis of Stamping DiesJ. Mater. Shaping Technoi. (1990) 8:17-22 9 1990 Springer-Verlag New York Inc.R . S . R a oAbstract:Experimental and computational procedures for studying deflections, flit, andalignment characteristics of a sequence of stamping dies, housed in a transfer press, are pre-sented. Die loads are actually measured at all the 12 die stations using new load monitors and used as input to the computational procedure. A typical stamping die is analyzed using a computational code, MSC/NASTRAN, based on finite element method. The analysis is then extended to the other dies, especially the ones where the loads are high. Stresses and deflections are evaluated in the dies for the symmetric and asymmetric loading conditions. Based on our independent die analysis, stresses and deflections are found to be reasonably well within the tolerable limits. However, this situation could change when the stamping dies are eventually integrated with the press as a total system which is the ultimate goal of this broad research program.INTRODUCTIONSheet metal parts require a series of operations such as shearing , drawing , stretching , bending , and squeezing. All these operations are carried out at once while the double slide mechanism descends to work on the parts in the die stations, housed in a transfer press [1]. Material is fed to the press as blanks from a stock feeder. In operation the stock is moved from one station to the next by a mechanism synchronized with the motion of the slide. Each die is a separate unit which may be independently adjusted from the main slide. An automotive part stamped from a hot rolled steel blank in 12 steps without any intermediate anneals is shown in Figure 1.Transfer presses are mainly used to produce different types of automotive and aircraft parts and home appliances. The economic use of transfer presses depends upon quantity production as their usual production rate is 500 to 1500 parts per hour [2]. Although production is rapid in this way, close tolerances are often difficult to achieve. Moreover, the presses produce a set of conditions for off-center loads owing to the different operations being performed simultaneously in several dies during each stroke. Thus, the forming load applied at one station can affect the alignment and general accuracy of the operation being performed at adjacent stations. Another practical problem is the significant amount of set-up time involved to bring all the dies into proper operation. Hence, the broad goal of this research is to study the structural characteristics of press and dies combination as a total system. In this paper, experimental and computational procedures for investigating die problems are presented. The analysis of structural characteristics of the transfer press was pursued separately [3].A transfer press consisting of 12 die stations was chosen for analysis. Typical die problems are excessive deflections, tilt, and misalignment of the upperand lower die halves. Inadequate cushioning and offcenter loading may cause tilt and misalignment of the dies. Tilt and excessive deflections may also be caused by the lack of stiffness of the die bolster and the die itself. Part quality can be greatly affected by these die problems. There are a lot of other parameters such as the die design, friction and lubrication along the die work interface, speed, etc. that play a great role in producing consistently good parts. Realistically, the analysis should be carded out by incorporating the die design and the deforming characteristics of the work material such as the elastic-plastic work hardening properties. In this preliminary study, the large plastic deformation of the workpiece was not considered for the reasons mentioned below.Large deformation modeling of a sheet stretching process was carded out using the computational code based on an elastic-plastic work hardening model of the deformation process [4]. Laboratory experiments were conducted on various commercial materials using a hemispherical punch. The coefficient of friction along the punch-sheet interface was actually measured in the experiment and used as a prescribed boundary to the numerical model. Although a good solution was obtained, it was realized that the numerical analysis was very sensitive to the frictional conditions along the interface. In the most recent work, a new friction model based on the micromechanics of the asperity contact was developed [5]. In the present problem, there are several operations such as deep drawing, several reduction drawing operations, and coining, which are performed using complex die geometries. The resources and the duration of time were not adequate to study these nonlinear problems. Hence,the preliminary study was limited to die problems basedon linear stress analysis.A detailed die analysis was carried out by using MSC /NASTRAN code based on finite ele mentmethod. Die loads were.measured at all the stations using new load monitors. Such measured data were used in the numerical model to evaluate stresses and deflections in the dies for normal operating conditions and for asymmetric loading conditions. Asymmetric loading conditions were created in the analysis by tilting the dies. In real practice, it is customary to pursue trial-and-error procedures such as placing shims under the die or by adjusting the cushion pressure to correct the die alignment problems. Such time consuming tasks can be reduced or even eliminated using the computational and experimental procedures presented here.DIE GEOMETRY AND MATERIALSThe design of metal stamping dies is an inexact process. There are considerable trial-and-error adjustments during die tryout that are often required to finish the fabrication of a die that will produce acceptable parts. It involves not only the proper selection of die materials, but also dimensions. In order to withstand the pressure, a die must have proper cross-sectional area and clearances. Sharp comers, radii, fillets, and sudden changes in the cross section can have deleterious effects on the die life. In this work, the analysis was done on the existing set of dies.The dies were made of high carbon, high chromium tool steel. The hardness of this tool steel material is in the range of Rockwell C 57 to 60. Resistance to wear and galling was greatly improved by coating the dies with titanium nitride and titanium carbide. The dies were supported by several other steel holders made of alloy steels such as SAE 4140. The geometry of a typical stamping die is axisymmetric but it varies slightly from die to die depending on the operation. Detailed information about geometry andmaterials of a reduction drawing die (station number 4) was gathered from blueprints. It was reproducedin three-dimensional geometry using a preprocessor, PATRAN. One quadrant of the die is shown in Figure2. The data including geometry and elastic properties of the die material were fed to the numerical model.The work material used was hot rolled aluminumkilled steel, SAE 1008 A-K Steel and the blank thickness was about 4.5 ram. Stampings used in unexposed places or as parts of some deisgn where fine finish is not essential are usually made from hot rolled steel. The automotive part produced in this die set is a cover for a torque converter. A principal advantage of aluminum-killed steel is its minimum strain aging. EXPERIMENTAL PROCEDURESAs mentioned earlier, this research involved monitoting of die loads which were to be used in the numerical model to staldy the structural characteristicsof dies. The other advantage is to avoid overloadingthe dies in practice. Off-center loading can be detected and also set-up time can be reduced. Thus, any changes in the thickness of stock, dulling of the die,unbalanced loads, or overloadings can be detected using die load monitors.Strain gage based fiat load cells made of high grade tool steel material werefabricated and supplied by IDC Corporation. Four identical load cells were embedded in a thick rectangular plate as shown in Figure 3. They were calibrated both in the laboratory and in the plant.The plate was placed on the top of the die. The knockout pin slips through the hole in the plate. Six such plates were placed on each of six dies. In this way,24 readings can be obtained at a given time. Then they were shifted to the other six dies for complete data. All the 12 die loads are presented in Table 1.COMPUTATIONAL PROCEDURESLinear static analysis using finite element method wasused to study the effect of symmetric and asymmetric loading for this problem. A finite element model of diestation 4 was created using the graphical preprocessor, PATRAN, and the analysis was carried outusing the code MSC/NASTRA N . The code has a wideT a b l e I. Die LoadsDie Station LoadNumber (kN)1 3562 6413 2144 3565 8546 7127 2858 32O9 234910 113911 21412 2100spectrum of capabilities, of which linear static analysis is discussed here.The NASTRAN code initially generates a structural matrix and then the stiffness and the mass matrices from the data in the input file. The theoretical formulations of a static structural problem by the displacement method can be obtained from the references [6]. The unknowns are displacements and are solved for the appropriate boundary conditions. Strains are obtained from displacements. Then they are converted into stresses by using elastic stress-strain relationships of the die material.The solution procedure began with the creation of die geometry using the graphical preprocessor, PATRAN. The solution domain was divided into appropriate hyper-patches. This was followed by the generation of nodes, which were then connected by elements. Solid HEXA elements with eight nodes were used for this problem. The nodes and elements were distributed in such a way that a finer mesh was created at the critical region of the die-sheet metal interface and a coarser mesh elsewhere. The model was then optimized by deleting the unwanted nodes. The element connectivities were checked. By taking advantage of the symmetry, only one quarter of the die was analyzed. In the asymmetric case, half of the die was considered for analysis. Although, in practice, the load is applied at the top of the die, for the purpose of proper representation of the boundary conditions to the computational code, reaction forces were considered for analysis. The displacement and force boundary conditions are shown for the two cases inFigure 4.As mentioned earlier, sheet metal was not modeled in this preliminary research.As shown in Figure 4(a),the nodes on the top surface of the die were constrained (stationary surface) and the measured load of 356 kN was equally distributed on the contact nodes at the workpiece die interface. Similar boundary conditions for the punch are shown in Figure 4(b). It is noticeable that fewer nodes are in contact with the sheet metal due to the die tilt for the asymmetric loading case as shown in Figure 4(c). In real practice, the pressure actually varies along the die contact surface. Since the actual distribution was not known, uniform distribution was considered in the present analysis.DISCUSSION OF RESULTSAs described in the earlier section, the numerical analysis of die Station 4 (both the die and punch) was performed using the code MSC/NASTRAN . Two cases were considered, namely: (a) symmetric loading and (b) asymmetric loadingFig. 4. Boundary conditions. (A) Symmetric case (onequadrant of the die). (B) Symmetric case (one quadrant ofnthe punch). (C) Asymmetric case (half of the die). Symmetric LoadingNumerical analysis of the die was carried out for a measured load o f 356 kN as distributed equally in Figure 4(a). The major displacements in the loading direction are shown in Figure 5(a). These displacement contours can be shown in various colors to represent different magnitudes. The m aximum displacement value is 0.01 m m fora uniformly distributed load of 356 kN. The corresponding critical stress is very small,8.4 MPa in the y direction and 30 MPa in the x direction. The calculated displacements and stresses at the surrounding elements and nodes wereof the same order, but they decreased in magnitude at the nodes away from this critical region. Thus, the die was considered very rigid under this loading condition.Symmetric loading was applied to the punch and the numerical analysis was carried out separately. The displacement values in the protruding region of the punch were high compared to the die. The maximum displacement was 0.08 m m . It should be noted that the displacement values in this critical range of the punch were of the same order ranging from 0.05 mm to 0.08 ram. Although the load acting on the punch (bottom half) was the same as the die (upper half), that is, 356 kN, the values of displacements and stresses were higher in the punch because of the differences in the geometry. This is especially true for the protruding part of the punch. The corresponding maxim u m stress was 232 MPa. This part of the punch is still in the elastic range as the yield strength of tool steel is approximately 1034 MPa. The critical stress value might be varied for different load distributions. Since the actual distribution of the load was not known,the load was distributed equally on all nodes. As the die (upper half) is operating in a region which is extremely safe, a change in the load distribution may not produce any high critical stresses in the die. Although higher loads are applied at other die stations(see Table 1), it is concluded that the critical stresses are not going to be significantly higher due to the appropriate changesin the die geometries.Asymmetric LoadingFor the purpose of analysis, an asymmetric loading situation was created by tilting the die. Thus, only 15 nodes were in contact with the workpiece compared to 40 nodes for the symmetric loading case. As shown in Figure 4(c), a 356 kN load was uniformly distributed over the 15 nodes that were in contact with the workpiece. Although the pressure was high, because of the geometry at the location where the load was acting, the critical values of displacement and stress were found to be similar to the symmetric case. The predicted displacement and stress values were not significantly higher than the values predicted for the symmetric case.Fig. 5. Displacement contours in the loading direction. (A) Symmetric case (one quadrant of thedie). (B) Symmetric case (one quadrant of the punch). (C)Asymmetric case (half of the die).CONCLUSIONSIn this preliminary study, we have demonstrated the capabilities of the computational procedure, based on finite element method, to evaluate the stresses and deflections within the stamping dies for the measured loads. The dies were found to be within the tolerable elastic limits for both symmetric and asymmetric loading conditions. Thus the computational procedure can be used to study the tilt and alignment characteristics of stamping dies. In general, the die load monitors are very useful not only for analysis but also for on-line tonnage control. Future research involves theintegration of the structural analysis of stamping dies with that of the transfer press as a total system.ACKNOWLEDGMENTSProfessor J.G. Eisley, W.J. Anderson, and Mr. D.Londhe are thanked for their comments on this paper.REFERENCES1. R.S. Rao and A. Bhattacharya, "Transfer Process De-flection, Parallelism, and Alignment Characteristics,"Technical Report, January 1988, Department of Mechanical Engineering and Applied Mechanics, the University of Michigan, Ann Arbor.2. Editors of American Machinist, "Metalforming: Modem Machines, Methods, andTooling for Engineers and Operating Personnel," McGraw-Hill, Inc., 1982, pp. 47-50.3. W.J. Anderson, J.G. Eisley, and M.A. Tessmer,"Transfer Press Deflection, Parallelism, and Alignment Characteristics," Technical Report, January 1988, Department of Aerospace Engineering, the University of Michigan, Ann Arbor.4. B.B. Yoon, R.S. Rao, and N. Kikuchi, "Sheet Stretching: A Theoretical Experimental Comparison," International Journal of Mechanical Sciences, V ol. 31, No.8, pp. 579-590, 1989.5. B.B. Yoon, R.S. Rao, and N. Kikuchi, "Experimental and Numerical Comparisons of Sheet Stretching Using a New Friction Model," ASME Journal of Engineering Materials and Technology, in press.6. MSX/NASTRAN, McNeal Schwendler Corporation.22 9 J. Materials Shaping Technology, V ol. 8, No. 1, 1990。

文献翻译译文-模具的历史发展

1 模具的历史发展David O.Kazmer.Injection mold design engineering.Hanser Gardner Publications，2007.模具的出现可以追溯到几千年前的陶器和青铜器铸造，但其大规模使用却是随着现代工业的掘起而发展起来的。

19世纪，随着军火工业(枪炮的弹壳)、钟表工业、无线电工业的发展，冲模得到广泛使用。

二次大战后，随着世界经济的飞速发展，它又成了大量生产家用电器、汽车、电子仪器、照相机、钟表等零件的最佳方式。

从世界范围看，当时美国的冲压技术走在前列——许多模具先进技术，如简易模具、高效率模具、高寿命模具和冲压自动化技术等，其大多起源于美国；而瑞士的精冲、德国的冷挤压技术、苏联对塑性加工的研究也处于世界先进行列。

50年代，模具行业工作重点是根据用户的要求，制作能满足产品要求的模具。

模具设计多凭经验，参考已有图纸和感性认识，对所设计模具零件的机能缺乏真切了解。

从1955年到1965年，是冲压工业的探索和开发时代——对模具主要零部件的机能和受力状态进行了数学分桥，并把这些知识不断应用于现场实际，使得冲压技术在各方面有飞跃的发展。

其结果是总结出了模具的设计原则，并使得压力机械、冲压材料、加工方法、模具结构、模具材料、模具制造方法、自动化装置等领域更新换代，并向实用化的方向前进，从而使冲压加工进入生产优良产品的第一阶段。

进入70年代，模具进入高速化、机械化、精密化、安全化发展的第二阶段。

在这个过程中不断涌现各种高效率、高寿命、高精度、多功能的自动化模具。

其代表是多个工位的级进模和十几个工位的多工位传递模。

在此基础上又发展出既有连续冲压工位又有多滑块成形工位的压力机—弯曲机。

在此期间，日本站到了世界最前列——其模具加工精度进入了微米级，模具寿命，合金钢制造的模具达到了几千万次，硬质合金钢制造的模具达到了几亿次。

在冲压模具中，每分钟冲压次数，小型压力机通常为200至300次，最高为1200次至1500次。

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附录1 外文译文冲压变形冲压变形工艺可完成多种工序，其基本工序可分为分离工序和变形工序两大类。

分离工序是使坯料的一部分与另一部分相互分离的工艺方法，主要有落料、冲孔、切边、剖切、修整等。

其中有以冲孔、落料应用最广。

变形工序是使坯料的一部分相对另一部分产生位移而不破裂的工艺方法，主要有拉深、弯曲、局部成形、胀形、翻边、缩径、校形、旋压等。

从本质上看，冲压成形就是毛坯的变形区在外力的作用下产生相应的塑性变形，所以变形区的应力状态和变形性质是决定冲压成形性质的基本因素。

因此，根据变形区应力状态和变形特点进行的冲压成形分类，可以把成形性质相同的成形方法概括成同一个类型并进行系统化的研究。

绝大多数冲压成形时毛坯变形区均处于平面应力状态。

通常认为在板材表面上不受外力的作用，即使有外力作用，其数值也是较小的，所以可以认为垂直于板面方向的应力为零，使板材毛坯产生塑性变形的是作用于板面方向上相互垂直的两个主应力。

由于板厚较小，通常都近似地认为这两个主应力在厚度方向上是均匀分布的。

基于这样的分析，可以把各种形式冲压成形中的毛坯变形区的受力状态与变形特点，在平面应力的应力坐标系中(冲压应力图)与相应的两向应变坐标系中(冲压应变图)以应力与应变坐标决定的位置来表示。

也就是说，冲压应力图与冲压应变图中的不同位置都代表着不同的受力情况与变形特点(1)冲压毛坯变形区受两向拉应力作用时，可以分为两种情况：即σγ>σ>0σt=0和σθ>σγ>0，σt=0。

再这两种情况下，绝对值最大的应力都是拉应力。

以下对这两种情况进行分析。

1)当σγ>σθ>0且σt=0时，安全量理论可以写出如下应力与应变的关系式：(1-1) εγ/（σγ-σm）=εθ/（σθ-σm）=εt/（σt -σm）=k式中εγ，εθ，εt——分别是轴对称冲压成形时的径向主应变、切向主应变和厚度方向上的主应变；σγ，σθ，σt——分别是轴对称冲压成形时的径向主应力、切向主应力和厚度方向上的主应力；σm——平均应力，σm=（σγ+σθ+σt）/3；k——常数。

在平面应力状态，式（1—1）具有如下形式：3εγ/（2σγ-σθ）=3εθ/（2σθ-σt）=3εt/[-（σt+σθ）]=k （1—2）因为σγ>σθ>0，所以必定有2σγ-σθ>0与εθ>0。

这个结果表明：在两向拉应力的平面应力状态时，如果绝对值最大拉应力是σγ，则在这个方向上的主应变一定是正应变，即是伸长变形。

又因为σγ>σθ>0，所以必定有-（σt+σθ）<0与εt<0，即在板料厚度方向上的应变是负的，即为压缩变形，厚度变薄。

在σθ方向上的变形取决于σγ与σθ的数值：当σγ=2σθ时，εθ=0；当σγ>2σθ时，εθ<0；当σγ<2σθ时，εθ>0。

σθ的变化范围是σγ>=σθ>=0 。

在双向等拉力状态时，σγ=σθ，有式（1—2）得εγ=εθ>0 及εt <0 ；在受单向拉应力状态时，σθ=0，有式（2—2）可得，εθ=-εγ/2。

根据上面的分析可知，这种变形情况处于冲压应变图中的AON范围内（见图1—1）；而在冲压应力图中则处于GOH范围内（见图1—2）。

(1)当σθ>σγ>0且σt=0时，有式（1—2）可知：因为σθ>σγ>0，所以1）定有2σθ>σγ>0与εθ>0。

这个结果表明：对于两向拉应力的平面应力状态，当σθ的绝对值最大时，则在这个方向上的应变一定时正的，即一定是伸长变形。

又因为σγ>σθ>0，所以必定有-（σt+σθ）<0与εt<0，即在板料厚度方向上的应变是负的，即为压缩变形，厚度变薄。

在σθ方向上的变形取决于σγ与σθ的数值：当σθ=2σγ时，εγ0；当σθ>σγ，εγ<0；当σθ<2σγ时，εγ>0。

σγ的变化范围是σθ>= σγ>=0 。

当σγ=σθ时，εγ=εθ>0，也就是在双向等拉力状态下，在两个拉应力方向上产生数值相同的伸长变形；在受单向拉应力状态时，当σγ=0时，εγ=-εθ/2，也就是说，在受单向拉应力状态下其变形性质与一般的简单拉伸是完全一样的。

这种变形与受力情况，处于冲压应变图中的AOC范围内（见图1—1）；而在冲压应力图中则处于AOH范围内（见图1—2）。

上述两种冲压情况，仅在最大应力的方向上不同，而两个应力的性质以及它们引起的变形都是一样的。

因此，对于各向同性的均质材料，这两种变形是完全相同的。

(1)冲压毛坯变形区受两向压应力的作用，这种变形也分两种情况分析，即σγ<σθ<σt=0和σθ<σγ<0，σt=0。

1）当σγ<σθ<0且σt=0时，有式（1—2）可知：因为σγ<σθ<0，一定有2σγ-σθ<0与εγ<0。

这个结果表明：在两向压应力的平面应力状态时，如果绝对值最大拉应力是σγ<0，则在这个方向上的主应变一定是负应变，即是压缩变形。

又因为σγ<σθ<0，所以必定有-（σt+σθ）>0与εt>0，即在板料厚度方向上的应变是正的，板料增厚。

在σθ方向上的变形取决于σγ与σθ的数值：当σγ=2σθ时，εθ=0；当σγ>2σθ时，εθ<0；当σγ<2σθ时，εθ>0。

这时σθ的变化范围是σγ与0之间。

当σγ=σθ时，是双向等压力状态时，故有εγ=εθ<0；当σθ=0时，是受单向压应力状态，所以εθ=-εγ/2。

这种变形情况处于冲压应变图中的EOG范围内（见图1—1）；而在冲压应力图中则处于COD范围内（见图1—2）。

2) 当σθ<σγ<0且σt=0时，有式（1—2）可知：因为σθ<σγ<0，所以一定有2σθσγ<0与εθ<0。

这个结果表明：对于两向压应力的平面应力状态，如果绝对值最大是σθ，则在这个方向上的应变一定时负的，即一定是压缩变形。

又因为σγ<σθ<0，所以必定有-（σt+σθ）>0与εt>0，即在板料厚度方向上的应变是正的，即为压缩变形，板厚增大。

在σθ方向上的变形取决于σγ与σθ的数值：当σθ=2σγ时，εγ=0；当σθ>2σγ，εγ<0；当σθ<2σγ时，εγ>0。

这时，σγ的数值只能在σθ<= σγ<=0 之间变化。

当σγ=σθ时，是双向等压力状态，所以εγ=εθ<0；当σγ=0时，是受单向压应力状态，所以有εγ=-εθ/2>0。

这种变形与受力情况，处于冲压应变图中的GOL范围内（见图1—1）；而在冲压应力图中则处于DOE范围内（见图1—2）。

(1)冲压毛坯变形区受两个异号应力的作用，而且拉应力的绝对值大于压应力的绝对值。

这种变形共有两种情况，分别作如下分析。

1）当σγ>0，σθ<0及|σγ|>|σθ|时，由式（1—2）可知：因为σγ>0，σθ<0及|σγ|>|σθ|，所以一定有2σγ-σθ>0及εγ>0。

这个结果表明：在异号的平面应力状态时，如果绝对值最大应力是拉应力，则在这个绝对值最大的拉应力方向上应变一定是正应变，即是伸长变形。

又因为σγ>0，σθ<0及|σγ|>|σθ|，所以必定有εθ<0，即在板料厚度方向上的应变是负的，是压缩变形。

这时σθ的变化范围只能在σθ=-σγ与σθ=0的范围内。

当σθ=-σγ时，εγ>0εθ<0且|εγ|=|εθ|；当σθ=0时，εγ>0，εθ<0，而且εθ=-εγ/2，这是受单向拉的应力状态。

这种变形情况处于冲压应变图中的MON范围内（见图1—1）；而在冲压应力图中则处于FOG范围内（见图1—2）。

2）当σθ>0，σγ<0，σt=0及|σθ|>|σγ|时，由式（1—2）可知：用与前项相同的方法分析可得εθ>0。

即在异号应力作用的平面应力状态下，如果绝对值最大应力是拉应力σθ，则在这个方向上的应变是正的，是伸长变形；而在压应力σγ方向上的应变是负的（εγ<=0），是压缩变形。

这时σγ的变化范围只能在σγ=-σθ与σγ=0的范围内。

当σγ=-σθ时，εθ>0，εγ<0且|εγ|=|εθ|；当σγ=0时，εθ>0，εγ<0，而且εγ=-εθ/2。

这种变形情况处于冲压应变图中的COD范围内（见图1—1）；而在冲压应力图中则处于AOB范围内（见图1—2）。

虽然这两种情况的表示方法不同，但从变形的本质看是一样的。

(1)冲压毛坯变形区受两个方向上的异号应力的作用，而且压应力的绝对值大于拉应力的绝对值。

以下对这种变形的两种情况分别进行分析。

1）当σγ>0，σθ<0而且|σθ|>|σγ|时，由式（1—2）可知：因为σγ>0，σθ<0及|σθ|>|σγ|，所以一定有2σθ- σγ<0及εθ<0。

这个结果表明：在异号的平面应力状态时，如果绝对值最大应力是压应力σθ，则在这个方向上应变是负的，即是压缩变形。

又因为σγ>0，σθ<0，必定有2σγ- σθ<0及εγ>0，即在拉应力方向上的应变是正的，是伸长变形。

这时σγ的变化范围只能在σγ=-σθ与σγ=0的范围内。

当σγ=-σθ时，εγ>0εθ<0且εγ=-εθ；当σγ=0时，εγ>0，εθ<0，而且εγ=-εθ/2。

这种变形情况处于冲压应变图中的DOF范围内（见图1—1）；而在冲压应力图中则处于BOC范围内（见图1—2）。

2）当σθ>0，σγ<0，σt=0及|σγ|>|σθ|时，由式（1—2）可知：用与前项相同的方法分析可得εγ<σγ0。

即在异号应力作用的平面应力状态下，如果绝对值最大应力是压应力σγ，则在这个方向上的应变是负的，是压缩变形；而在拉应力σθ方向上的应变是正的，是伸长变形。

这时σθ的数值只能介于σθ=-σγ与σθ=0的范围内。

当σθ=-σγ时，εθ>0，εγ<0且εθ=-εγ；当σθ=0时，εθ>0，εγ<0，而且εθ=-εγ/2。

这种变形情况处于冲压应变图中的DOE范围内（见图1—1）；而在冲压应力图中则处于BOC范围内（见图1—2）。

这四种变形与相应的冲压成形方法之间是相对的，它们之间的对应关系，用文字标注在图1—1与图1—2上。

上述分析的四种变形情况，相当于所有的平面应力状态，也就是说这四种变形情况可以把全部的冲压变形毫无遗漏地概括为两大类别，即伸长类与压缩类。