机械专业英语课件4
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《机械类专业英语》课件
Skimming
This skill allows readers to quickly scan through the text to get a general understanding of the content It is often used to identify key information or main ideas
Learning significance and purpose
Learning significance and purpose
Learning significance: Mastering mechanical English is of great significance for enhancing personal competitiveness, broadening international perspectives, and promoting academic exchanges.
PPT courseware for Mechanical Professional English
• Introduction to Mechanical Professional English
• Mechanical English Vocabulary • Mechanical English Reading and
Outline
Skimming through the text to identify key information or ideas and creating an outline to organize them This helps readers understand the structure of the article and how different ideas are connected
This skill allows readers to quickly scan through the text to get a general understanding of the content It is often used to identify key information or main ideas
Learning significance and purpose
Learning significance and purpose
Learning significance: Mastering mechanical English is of great significance for enhancing personal competitiveness, broadening international perspectives, and promoting academic exchanges.
PPT courseware for Mechanical Professional English
• Introduction to Mechanical Professional English
• Mechanical English Vocabulary • Mechanical English Reading and
Outline
Skimming through the text to identify key information or ideas and creating an outline to organize them This helps readers understand the structure of the article and how different ideas are connected
机械类专业英语ppt课件
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14
❖ cumulative ['kjuːmjʊlətɪv]
❖ adj. 累积的
❖ cumulative error 累积误差 ; 积累误差 ; 累积差误 ❖ cumulative frequencies 累积频数 ; 累计频数 ❖ cumulative learning 累积学习
❖ dimensionless
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❖ uniaxial ❖ adj. 单轴（向）的，同轴的
念 ; 压力集中 ❖ axial stress 轴向应力 ; 轴应力 ; 多轴向应力 ❖ ; 热应力试验 ❖ stress corrosion 应力腐蚀 ; 超应力腐蚀 ; 应力腐化 ; 应 ❖ Stress ball 压力球 ; 减压球 ; 美国原装 ; 握力球 ❖ stress amplitude 应力幅 ; 应力幅值 ; 应力幅度 ; 应力振幅
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❖ quantity
❖ n. 参数，值；数量；总量
❖ physical quantity 物理量 ; 物理量 ; 实物量 ; 要的实物量 ❖ dimensionless quantity 无量纲量 ; 无因次量 ; 无因次值 ❖ average quantity 平均数量 ; 平均量 ; 均匀数量 ; 均匀数目 ❖ additional quantity 追加数量 ; 额外数量 ; 附加量 ❖ considerable quantity 大数量 ; 可观的
❖ magnitude
❖ n. 数量、数值；大小；量级
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❖ equilibrium ❖ n. 平衡；稳定；保持平衡的能力
❖ [,iːkwɪ'lɪbrɪəm]
机械专业英语课件 PPT
1.There are two kinds of gun drills, namely, the center-cut gun drill used for drilling blind holes and the trepanning drill.
深孔钻分为两种，即用于钻削盲孔的中心钻和套孔 钻。
另一方面，直柄钻被固定到钻夹中，同理， 钻夹以与锥柄钻相同的方式固定到主轴孔中。
Paragraph 5
1.Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available. The size of twist drills used in industrial range from 0.01 up to 3.25 in. (i.e., 0.25 up to 80 mm).
钻是利用绕轴旋转的钻头在工件上生成通孔或盲 孔的加工工艺。
2.Consequently, the range of cutting from that axis of rotation is equal to the radius of required hole.
因此，旋转轴的切削范围就等于所钻孔的半径。
2.This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.这种类型的钻具有三个或四个出屑槽以及 相同数量的刃带，这些可确保准确的导向，从而获 得较高的机加工精度。
深孔钻分为两种，即用于钻削盲孔的中心钻和套孔 钻。
另一方面，直柄钻被固定到钻夹中，同理， 钻夹以与锥柄钻相同的方式固定到主轴孔中。
Paragraph 5
1.Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available. The size of twist drills used in industrial range from 0.01 up to 3.25 in. (i.e., 0.25 up to 80 mm).
钻是利用绕轴旋转的钻头在工件上生成通孔或盲 孔的加工工艺。
2.Consequently, the range of cutting from that axis of rotation is equal to the radius of required hole.
因此，旋转轴的切削范围就等于所钻孔的半径。
2.This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.这种类型的钻具有三个或四个出屑槽以及 相同数量的刃带，这些可确保准确的导向，从而获 得较高的机加工精度。
机械工程专业英语精品PPT课件
专利检索资源荟萃（二）
8.美国专利检索： 9.欧洲专利检索： 10.从ESPACENET数据库提取世界各Байду номын сангаас专利文献的方法（国知局提供）： 11.欧洲专利局免费专利数据库（含欧洲各国家入口）： 12.欧洲专利局专利数据高级检索（含欧洲、PCT和世界范围三个数据库）： 13.欧洲专利法律状态查询： 14.PCT专利检索： 15.英国专利检索：
26. 印度专利数据库： 27.新加坡综合专利数据库（含美国、新加坡、PCT、欧洲专利、英国、中国、 加拿大、韩国、中国台湾、日本、泰国）： 28.香港专利检索：Þx.html 29.澳门专利检索：
30. google专利搜索： 31.日本专利检索：
机械工程专业信息检索
ASME-American Society of Mechanical Engineers美国机械工程师协 会 SAE-Society of Automobile Engineers美国汽车工程师协会 EI-Engineering Index工程索引 IEEE-Institute of Electrical and Electronics Engineers (美国)电机及 电子工程师学会 IET-The Institution of Engineering and Technology英国工程技术学 会（IET）系英国电气工程师学会（IEE）和英国企业工程师学会 （IIE）于2006年初合并组建而成 NTIS-National Technical Information Service美国国家技术情报服务 局 UMI-美国UMI公司，学位论文的信息服务（ProQuest ）。 ISO-International Organization for Standardization国际标准化组织。
精品课件-机械工程英语-Chapter 4
Chapter 4 Inspection Technology Listening
Chapter 4 Inspection Technology
Task 1 Su Yang is discussing an inspection scheme with Zhao Lin, the Quality Inspection Manager. Listen to the conversation and choose the best answer to each question.
Task 1 Listen to the recording and read the dialogues aloud.
9 before
we can set up a sequence of 10 .
Gu Jie: Contact me anytime you have a problem.
Chapter 4 Inspection Technology Speaking
Chapter 4 Inspection Technology
Chapter 4 Inspection Technology
Dialogue 3 Gu Jie: Hello? Get me Su Yang on the phone, please. Su Yang: This is Su Yang. Is that Mr. Gu? Gu Jie: Yes. This is Gu Jie. Su Yang, have you been informed of the meeting to be held this afternoon? Su Yang: Yes. It is about the problem I have found during the First Piece Inspection. Gu Jie: I’m calling to ask you about it. What problem have you found? Su Yang: It’s the tailstock of the newly designed lathe. It is not tight. Gu Jie: Have you recorded down all the measurements and observations about it on the First Piece
机械工程专业英语Unit 4
❖ In hammer forging, the component is shaped by hammer blows aided by relatively simple tools.
❖ One of the basic operations of hammer forging is the elongation of a piece of metal by stretching with hammer blows, causing it to become thinner and longer. 锤锻中常用开式模锻。在锤锻中零件通过锤击辅之以相对简单的 工具成型。其中包括开式锻模。锤锻的基本操作之一就是通过锤击使 金属伸长，促成其变细变长。
❖ Advantage：can produce components Байду номын сангаасf greater complexity and accuracy, with a better surface finish, than the more traditional methods not using closed dies. 优点：闭式模锻能生产高度复杂和精确的零件，而且表面光洁度要 比不用闭式锻模的更传统方法好。
它们均利用下落重量来产生金属成型所需的压力。锻造大零件则要 用到蒸汽、压缩空气、液压或电力驱动的锻压机。大型的自动化锻机用 于工程零件的批量生产。
open-die forging &closed-die forging 开式锻模和闭式锻模
1. open-die forging 开式锻模
❖ open-die forging, usually in the form of hammer forging.
Unit 4 Forging Processes
❖ One of the basic operations of hammer forging is the elongation of a piece of metal by stretching with hammer blows, causing it to become thinner and longer. 锤锻中常用开式模锻。在锤锻中零件通过锤击辅之以相对简单的 工具成型。其中包括开式锻模。锤锻的基本操作之一就是通过锤击使 金属伸长，促成其变细变长。
❖ Advantage：can produce components Байду номын сангаасf greater complexity and accuracy, with a better surface finish, than the more traditional methods not using closed dies. 优点：闭式模锻能生产高度复杂和精确的零件，而且表面光洁度要 比不用闭式锻模的更传统方法好。
它们均利用下落重量来产生金属成型所需的压力。锻造大零件则要 用到蒸汽、压缩空气、液压或电力驱动的锻压机。大型的自动化锻机用 于工程零件的批量生产。
open-die forging &closed-die forging 开式锻模和闭式锻模
1. open-die forging 开式锻模
❖ open-die forging, usually in the form of hammer forging.
Unit 4 Forging Processes
《机械类专业英语》课件
《机械类专业英语》PPT 课件
这是一份关于《机械类专业英语》的PPT课件，涵盖了机械类专业英语的基础 知识、技能培训、实践案例和学习资料推荐。
第一部分：机械类专业英语基础知识
机械类词汇学习
掌握机械类专业中常用的英文词汇，扩展专业词汇量。
机械类专业常用句型
学习机械类专业中常见的句型，提高英语表达能力。
机械类专业常见缩写和术语解释
了解机械类专业中常用的缩写和术语，避免词汇歧义。
第二部分：机械类专业英语技能培训
机械类专业文档英文写作 技巧
分享撰写机械类专业文档的英文 写作技巧和注意事项。
机械类专业技术文献阅读 策略
介绍阅读机械类专业技术文献的 方法和技巧。
机械类专业领域英语口语 表达技巧
分享在机械类专业领域进行英语 口语表达的技巧和经验。
第三部分：机械类专业英语实践案例
1
机械类专业项目报告英文演讲
演示机械类专业项目报告时的英文演讲技巧和范例。
2
机械类专业跨文化交流中的英语技巧
探讨在机械类专业跨文化交流中使用英语的技巧和方法。
3
机械类专业国际会议英语能力培训
培养参加机械类专业国际会议时的英语交流能力和跨文化沟通技巧。
第四部分：机械类专业英语学习资料推荐
1 机械类英语在线学习 2 机械类英语词汇学习 3 机械类英语学习书籍
网站推荐
助手推荐
推荐
介绍几个优质的机械类英 语在线学习网站，提供学 习资习助手工具，帮 助提高词汇记忆。
推荐一些经典的机械类英 语学习书籍，助力学习进 步。
总结
通过本次《机械类专业英语》PPT课件，您将了解机械类专业英语的基础知识、 技能培训、实践案例和学习资料推荐，帮助您提升在机械类专业领域中的英 语能力。
这是一份关于《机械类专业英语》的PPT课件，涵盖了机械类专业英语的基础 知识、技能培训、实践案例和学习资料推荐。
第一部分：机械类专业英语基础知识
机械类词汇学习
掌握机械类专业中常用的英文词汇，扩展专业词汇量。
机械类专业常用句型
学习机械类专业中常见的句型，提高英语表达能力。
机械类专业常见缩写和术语解释
了解机械类专业中常用的缩写和术语，避免词汇歧义。
第二部分：机械类专业英语技能培训
机械类专业文档英文写作 技巧
分享撰写机械类专业文档的英文 写作技巧和注意事项。
机械类专业技术文献阅读 策略
介绍阅读机械类专业技术文献的 方法和技巧。
机械类专业领域英语口语 表达技巧
分享在机械类专业领域进行英语 口语表达的技巧和经验。
第三部分：机械类专业英语实践案例
1
机械类专业项目报告英文演讲
演示机械类专业项目报告时的英文演讲技巧和范例。
2
机械类专业跨文化交流中的英语技巧
探讨在机械类专业跨文化交流中使用英语的技巧和方法。
3
机械类专业国际会议英语能力培训
培养参加机械类专业国际会议时的英语交流能力和跨文化沟通技巧。
第四部分：机械类专业英语学习资料推荐
1 机械类英语在线学习 2 机械类英语词汇学习 3 机械类英语学习书籍
网站推荐
助手推荐
推荐
介绍几个优质的机械类英 语在线学习网站，提供学 习资习助手工具，帮 助提高词汇记忆。
推荐一些经典的机械类英 语学习书籍，助力学习进 步。
总结
通过本次《机械类专业英语》PPT课件，您将了解机械类专业英语的基础知识、 技能培训、实践案例和学习资料推荐，帮助您提升在机械类专业领域中的英 语能力。
《机械类专业英语》课件
Summary
Mastering common sentence patterns and grammar is the key to accurately expressing concepts in the field of machinery.
Detailed description
There are some specific sentence patterns and grammatical structures in Mechanical English, such as passive voice and complex sentence patterns. Learners need to be familiar with these sentence patterns and grammar to ensure that they can accurately and fluently express their meaning in writing and speaking.
Course objectives and learning significanceCourse objective: By studying mechanical engineering English, students will be able to master professional English vocabulary, terminology, and expressions in the field of mechanical engineering, and improve their reading, writing, translation, and communication skills.Learning significance: Students with mechanical English proficiency can better adapt to international demands, enhance their competitiveness in the field of mechanical engineering, and also contribute to promoting technical exchange and cooperation in the field of mechanical engineering.
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受到阻力时，螺纹产生轴向力的现象可由斜面原理来 解释。
11
Further rotation demands increased efforts (torque), with a resulting increase in axial force.
再进一步旋转需要增加扭矩（torque）同时轴向力也 增大。
如标示：，表示：一外螺纹零件，公称直径英寸，20 牙/英寸的统一粗牙螺纹，公差等级2，及右旋螺纹。
18
Usually the hand designation is omitted for right-hand, since these are standard. Another example is 3/4-16UNF-2B-LH which designates an internal, left-hand thread having a basic major diameter of 3/4 in., and 16 unified fine threads per inch of length.
13
The coarse-thread series (UNC) is most common and is recommended for general assembly use where vibration is not a problem and where frequent disassembly is required.
所有这些都是基于单头螺纹螺钉的，它是一个简单机 械，可以在最小的空间内产生很大的机械增益，而且 在理论上是自锁的。
7
Effective use however, requires the aid of two other simple machines: the lever(手柄) and the wheel-and-axle machine. The wrench(扳手) is basically a lever, the screwdriver is a wheeland-axle machine.
统一标准超细牙螺纹用于薄壁零件的外螺纹配合。
This series is also more resistance to vibration and provides for very fine adjustment.
该系列用于要求抗振动性强的场合，及更精密调整的 场合。
16
Paragraph 5
ISO标准包含许多直径螺距组合系列，但推荐的美国 标准指定了单一的直径螺距组合系列。
20
Metric threads(公制螺纹) are designated by the letter M followed by basic major diameter(公称直径) in millimeters, which is then followed by the pitch in millimeters separated by the symbol “x”.
尽管存在其它先进的联接方式，螺纹紧固件的应用仍 保留了机器设计和制造过程中基本的装配方法。
4
Thus the designers must select standard fasteners of the type and size that will most adequately suit the application at hand.
因此，设计者在满足使用要求时应用标准类型和尺寸 的螺纹紧固件。
5
Paragraph 2:
A threaded fastener is a device that can effectively exert(施加) and maintain a large force in one direction (axially) through the application of a small force in another direction (tangentially).
统一标准粗牙螺纹系列是最普通的，推荐用于一般的
装配场合——振动较小，频繁拆卸。
14
The fine-thread series (UNF) is somewhat stronger in tension and is more suitable where fine adjustment may be required.
Matching external and internal threads so that they may be assembled is the key to all threaded fasteners.
螺纹也可在孔的内圆柱表面上生成，这就形成了螺母。 内外螺纹匹配是所有螺纹紧固件装配的关键。
2
Paragraph 1
Threaded fasteners perform the function of locating, clamping, adjusting and transmitting force from one machine member to another.
螺纹紧固件起着定位、加紧、调整和从一个机器零 件向另一个传递力的作用。
This series is often used in aircraft assemblies.
统一标准细牙螺纹系列具有较大张紧力，较适用于精 密调整的场合。该系列常用于航空器的装配。
15
The extra-fine-thread series (UNEF) is employed where the mating external thread is in a thin-walled member(薄壁件).
螺纹紧固件是这样一个装置，在切线方向上施加一个 较小的力，能在轴线方向上有效地产生并保持一个较 大的力。
6
All are based on the single threaded screw, a simple machine that yields a large mechanical advantage(机械增益) in minimal space and theoretically is self locking(自锁的).
They are thoroughly standardized and generally designed for use in mass production of machines(设计用于机床大批量 生产).
它们已经完全标准化，且通常用于大批量生产的机 器上。
3
The use of the threaded fasteners remains the basic assembly method in the design and construction of machines despite advances in other methods of joining.
上一课回顾
单词复习：
1
Lesson 4 Threaded Fasteners
螺纹紧固件
重点词汇： 1.locate vt. 确定位置 2.clamp vt. 夹紧 3. Mass production 大规模生产 4. Screw/Bolt/Stud/Nut 5.torque 扭矩 6.washer n. 垫片 7.helical spring lockwasher 弹簧垫圈
Thus the connection remains tight unless some external influence such as vibration or temperature change overrides the initial condition.
这样只要没有像振动、温度变化这些外部因素改变初 始条件，这种联接就能维持紧固的状态。
统一标准螺纹用一个简化符号标识在图形零件的细表 等场合。该符号包括：尺寸，螺纹系列，配合等级， 内外螺纹符号（A——外螺纹，B——内螺纹）及旋向。
17
For example, the designation 1/4-20UNC-2ARH identifies an externally threaded part having a basic major diameter of 1/4 in., unified coarse thread with 20 threads per inch, tolerance class 2, and right-hand threads.
螺纹紧固件是尺寸较小，承受高拉应力的零件。螺纹 是通过在圆柱形棒料上切削加工或冷压成型的沟槽形 成的螺旋凸起物，这样产生了大家所知的螺钉、螺栓、 双头螺柱。
9
Threads are also formed internally in cylindrical holes and constitute(构成) what is known as a nut(螺母).
Unified standard threads are identified on drawings, parts lists(零件清单), and so forth, with a shorthand notation(简单标注法) that includes size, thread series, class of fit, external or internal thread symbol (A is for external threads, B is for internal threads), and the hand of thread(螺纹旋向).
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Unified standard thread is available in three basic series of diameter-pitch( 直 径 螺 距 ) combinations.
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Further rotation demands increased efforts (torque), with a resulting increase in axial force.
再进一步旋转需要增加扭矩（torque）同时轴向力也 增大。
如标示：，表示：一外螺纹零件，公称直径英寸，20 牙/英寸的统一粗牙螺纹，公差等级2，及右旋螺纹。
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Usually the hand designation is omitted for right-hand, since these are standard. Another example is 3/4-16UNF-2B-LH which designates an internal, left-hand thread having a basic major diameter of 3/4 in., and 16 unified fine threads per inch of length.
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The coarse-thread series (UNC) is most common and is recommended for general assembly use where vibration is not a problem and where frequent disassembly is required.
所有这些都是基于单头螺纹螺钉的，它是一个简单机 械，可以在最小的空间内产生很大的机械增益，而且 在理论上是自锁的。
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Effective use however, requires the aid of two other simple machines: the lever(手柄) and the wheel-and-axle machine. The wrench(扳手) is basically a lever, the screwdriver is a wheeland-axle machine.
统一标准超细牙螺纹用于薄壁零件的外螺纹配合。
This series is also more resistance to vibration and provides for very fine adjustment.
该系列用于要求抗振动性强的场合，及更精密调整的 场合。
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ISO标准包含许多直径螺距组合系列，但推荐的美国 标准指定了单一的直径螺距组合系列。
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Metric threads(公制螺纹) are designated by the letter M followed by basic major diameter(公称直径) in millimeters, which is then followed by the pitch in millimeters separated by the symbol “x”.
尽管存在其它先进的联接方式，螺纹紧固件的应用仍 保留了机器设计和制造过程中基本的装配方法。
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Thus the designers must select standard fasteners of the type and size that will most adequately suit the application at hand.
因此，设计者在满足使用要求时应用标准类型和尺寸 的螺纹紧固件。
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A threaded fastener is a device that can effectively exert(施加) and maintain a large force in one direction (axially) through the application of a small force in another direction (tangentially).
统一标准粗牙螺纹系列是最普通的，推荐用于一般的
装配场合——振动较小，频繁拆卸。
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The fine-thread series (UNF) is somewhat stronger in tension and is more suitable where fine adjustment may be required.
Matching external and internal threads so that they may be assembled is the key to all threaded fasteners.
螺纹也可在孔的内圆柱表面上生成，这就形成了螺母。 内外螺纹匹配是所有螺纹紧固件装配的关键。
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Threaded fasteners perform the function of locating, clamping, adjusting and transmitting force from one machine member to another.
螺纹紧固件起着定位、加紧、调整和从一个机器零 件向另一个传递力的作用。
This series is often used in aircraft assemblies.
统一标准细牙螺纹系列具有较大张紧力，较适用于精 密调整的场合。该系列常用于航空器的装配。
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The extra-fine-thread series (UNEF) is employed where the mating external thread is in a thin-walled member(薄壁件).
螺纹紧固件是这样一个装置，在切线方向上施加一个 较小的力，能在轴线方向上有效地产生并保持一个较 大的力。
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All are based on the single threaded screw, a simple machine that yields a large mechanical advantage(机械增益) in minimal space and theoretically is self locking(自锁的).
They are thoroughly standardized and generally designed for use in mass production of machines(设计用于机床大批量 生产).
它们已经完全标准化，且通常用于大批量生产的机 器上。
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The use of the threaded fasteners remains the basic assembly method in the design and construction of machines despite advances in other methods of joining.
上一课回顾
单词复习：
1
Lesson 4 Threaded Fasteners
螺纹紧固件
重点词汇： 1.locate vt. 确定位置 2.clamp vt. 夹紧 3. Mass production 大规模生产 4. Screw/Bolt/Stud/Nut 5.torque 扭矩 6.washer n. 垫片 7.helical spring lockwasher 弹簧垫圈
Thus the connection remains tight unless some external influence such as vibration or temperature change overrides the initial condition.
这样只要没有像振动、温度变化这些外部因素改变初 始条件，这种联接就能维持紧固的状态。
统一标准螺纹用一个简化符号标识在图形零件的细表 等场合。该符号包括：尺寸，螺纹系列，配合等级， 内外螺纹符号（A——外螺纹，B——内螺纹）及旋向。
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For example, the designation 1/4-20UNC-2ARH identifies an externally threaded part having a basic major diameter of 1/4 in., unified coarse thread with 20 threads per inch, tolerance class 2, and right-hand threads.
螺纹紧固件是尺寸较小，承受高拉应力的零件。螺纹 是通过在圆柱形棒料上切削加工或冷压成型的沟槽形 成的螺旋凸起物，这样产生了大家所知的螺钉、螺栓、 双头螺柱。
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Threads are also formed internally in cylindrical holes and constitute(构成) what is known as a nut(螺母).
Unified standard threads are identified on drawings, parts lists(零件清单), and so forth, with a shorthand notation(简单标注法) that includes size, thread series, class of fit, external or internal thread symbol (A is for external threads, B is for internal threads), and the hand of thread(螺纹旋向).
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Paragraph 4:
Unified standard thread is available in three basic series of diameter-pitch( 直 径 螺 距 ) combinations.