机械专业论文中英文摘要
摘要
本文主要论述了基于PLC的钢管打捆机控制系统的设计思路和设计过程。主要包括钢管打捆机的汽缸动作的顺序控制和打捆钢带的定长剪切伺服控制以及人机交互界面设计。
论文介绍了钢管打捆机的国内外研究情况，说明了研制具有我国自主知识产权的钢管打捆机的必要性，讲述了国家对钢管包装的要求和对钢管打捆机的性能要求；分析了给定结构的钢管打捆机的工作流程和控制要求；设计和选用了钢管打捆机的气动系统和相应的控制系统的硬件；建立了打捆钢带定长剪切伺服控制的数学模型；选用触摸屏进行了人机交互界面的设计；对PLC控制系统的重点和难点程序进行了详细叙述。
本文所设计的钢管打捆机控制系统具有根据设定参数自动对钢管计数、自动剪切打捆钢带、自动完成钢管打捆的动作控制等功能，同时通过触摸屏实现参数的输入和实时显示。
关键词：自动钢管打捆机；定长剪切；变频调速；人机界面
This article mainly discusses the design idea and the design process of the PLC based strapping machine controlling system. It includes the sequence control of the cylinder moves of the strapping machine, the fixed-length shear servo control of the steel packing, and the designs of the Man-machine interface.
The thesis introduces the strapping machine’s studying condition both at home and abroad, illustrating the necessity of owning the strapping machine of the Independent intellectual property rights; analyzing the workflow and the control requirements of the given structure strapping machine; designing and choosing the hardware of the strapping machine’s pneumatic system and the corresponded controlling system; establishing the mathematical model of the fixed-length shear servo control; choosing the touch screen to do designs of the Man-machine interface; doing detailed descriptions to the important and difficult process of the PLC controlling system.
The strapping machine’s controlling system designed by this thesis owns the functions of counting steels automatically according to the setting parameters, shearing the packed steels automatically, and fulfilling the motion control of packing steels automatically, and at the same time, realizing the parameters input and the real-time display by the touch screen.
Key words: automatic strapping machine; fixed-length shear; frequency control; man-machine interface
英语毕业论文最新英文论文的致谢词
最新英文论文的致谢词 论文英文答谢词1 First of all, I would like to extend my sincere gratitude to my supervisor, Zhang Hong, for her instructive advice and useful suggestions on my thesis. I am deeply grateful of her help in the completion of this thesis. High tribute shall be paid to Ms. Geng Li, whose profound knowledge of English triggers my love for this beautiful language and whose earnest attitude tells me how to learn English. I am also deeply indebted to all the other tutors and teachers in Translation Studies for their direct and indirect help to me. Special thanks should go to my friends who have put considerable time and effort into their comments on the draft. Finally, I am indebted to my parents for their continuous support and encouragement. 论文英文答谢词2 I would like to express my gratitude to all those who helped me during the writing of this thesis.
机械专业外文翻译中英文翻译
外文翻译 英文原文 Belt Conveying Systems Development of driving system Among the methods of material conveying employed，belt conveyors play a very important part in the reliable carrying of material over long distances at competitive cost．Conveyor systems have become larger and more complex and drive systems have also been going through a process of evolution and will continue to do so．Nowadays，bigger belts require more power and have brought the need for larger individual drives as well as multiple drives such as 3 drives of 750 kW for one belt(this is the case for the conveyor drives in Chengzhuang Mine)．The ability to control drive acceleration torque is critical to belt conveyors’ performance．An efficient drive system should be able to provide smooth，soft starts while maintaining belt tensions within the specified safe limits．For load sharing on multiple drives．torque and speed control are also important consideratio ns in the drive system’s design. Due to the advances in conveyor drive control technology，at present many more reliable．Cost-effective and performance-driven conveyor drive systems cov ering a wide range of power are available for customers’ choices[1]. 1 Analysis on conveyor drive technologies 1．1 Direct drives Full-voltage starters．With a full-voltage starter design，the conveyor head shaft is direct-coupled to the motor through the gear drive．Direct full-voltage starters are adequate for relatively low-power, simple-profile conveyors．With direct fu11-voltage starters．no control is provided for various conveyor loads and．depending on the ratio between fu11- and no-1oad power requirements，empty starting times can be three or four times faster than full load．The maintenance-free starting system is simple，low-cost and very reliable．However, they cannot control starting torque and maximum stall torque；therefore．they are
毕业论文中英文摘要及目录(供参考)
密级：立体停车库的PLC控制系统设计 Design of PLC Control System for Parking Garage 学院： 专业班级： 学号： 学生姓名： 指导教师： 2018年6月
摘要 随着我国国民经济的不断发展及城市现代化要求，汽车在我国越来越普及，而这将导致大中等城市“停车难”问题日益凸显。在现有的土地资源条件下，多层的机械式立体停车库可以很好的提高现有土地资源的利用率，充分发挥土地资源的空间优势，使得汽车的存放数量得以优化，从而快速有效地解决大中等城市“停车难”问题。本论文以一个三层三行三列二十一车位的升降横移式自动化立体停车库为主要研究对象，在深入分析了立体停车库运行原理的基础上，采用可编程控制器（PLC）为主要控制单元对该立体停车库控制系统进行设计。论文研究的主要内容为： 1、针对机械式立体停车库类型、国内外发展现状以及我国行业发展中存在的问题等进行研究。 2、选定以三层三行三列6+6+9结构二十一车位升降横移式立体停车库为研究模型，研究该立体停车库的总体结构设计及车库运行原理等。 3、对升降横移式立体停车库的硬件系统进行设计。内容包括：主回路设计，手动控制系统设计，PLC外围硬件设计，绘制了车库主电路图，手动控制电路图和PLC外围电路接线图等。 4、对升降横移式立体停车库的软件系统进行设计。内容包括：PLC总体介绍，PLC编程语言的选择，设计了程序主框架流程图，各基本功能程序流程图，按要求编写了梯形图程序等。 5、采用S7-200仿真软件对升降横移式立体停车库进行在线仿真与调试。 本论文重点对升降横移式立体停车库总体结构和控制系统的硬件、软件系统进行设计。设计过程采用模块化设计思路，结构灵活，通过对PLC软件系统设计及优化，使得本立体停车库具备智能化控制的功能，实现了立体停车库停车位能够安全、稳定、准确、快速的移动至人车交接处进行存取车操作。该立体停车库充分发挥土地资源的空间优势，大大提升了土地资源的空间利用率，是应对大中等城市停车难问题的有效解决方案。 关键词：立体停车库；升降横移式；PLC；控制系统设计 Abstract
毕业论文摘要格式
毕业论文摘要格式 论文摘要是文章的内容不加诠释和评论的简短陈述。为了国际交流,还应有外文(多用英文)摘要。摘要是在文章全文完成之后提炼出来的,具有短、精、完整三大特点。摘要应具有独立性的自含性、即不阅读原文的全文.就能获得必要的信息。摘要中有数据、有结论、是一篇完整的短文.可以独立使用,也可以引用,还可以用于工艺推广。其内容应该包含与报告论文同等量的主要信息.以供读者确定有无必要阅读原论文全文,也可提供给文摘第二次文献采用。摘要一般应说明研究工作目的、实验方法、结果和最终结论等.而重点是结果和结论。中文摘要一般不宜超过300字,外文摘要不宜超过250个实词。除了实在迫不得已,摘要中不用图、表、化学结构式、非公知公用的符号和术语。摘要可用另页置于题名页(页上无正文)之前,学术论文的摘要一般置于题名和作者之后,论文正文之前。 论文摘要又称概要、内容提要。摘要是以提供文献内容梗概为目的,不加评论和补充解释,简明、确切地记述文献重要内容的短文。其基本要素包括研究目的、方法、结果和结论。具体地讲就是研究工作的主要对象和范围,采用的手段和方法,得出的结果和重要的结论,有时也包括具有情报价值的其它重要的信息。摘要应具有独立性和自明性,并且拥
有与文献同等量的主要信息,即不阅读全文,就能获得必要的信息。摘要不容赘言,故需逐字推敲。内容必须完整、具体、使人一目了然。英文摘要虽以中文摘要为基础,但要考虑到不能阅读中文的读者的需求,实质性的内容不能遗漏。为此,我国的科技期刊近年来陆续采用结构式摘要,明确写出目的、方法、结果和结论四部分。 a.目的(Objective):简明指出此项工作的目的,研究的范围。 b.方法(Methods):简要说明研究课题的基本做法,包括对象(分组及每组例数、对照例数或动物只数等)、材料和方法(包括所用药品剂量,重复次数等)。统计方法特殊者需注明。 c.结果(Results):简要列出主要结果(需注明单位)、数据、统计学意义(P值)等,并说明其价值和局限性。 d.结论(Conclusion):简要说明从该项研究结果取得的正确观点、理论意义或实用价值、推广前景。 中、英文摘要前需标明中、英文文题,作者姓名(至多3名)及作者单位(邮政编码)。英文摘要应隔行打字,以便修改。 2摘要的写作注意事项 1)摘要中应排除本学科领域已成为常识的内容;切忌把应在引言中出现的内容写入摘要;一般也不要对论文内容作诠释和评论(尤其是自我评价)。
论文致谢词范文(英文版)
论文致谢词范文（英文版） 第1篇论文致谢词范文（英文版） First of all, I would like to express my gratitude to all those who helped me during the writing of this thesis. I gratefully acknowledge the help of my supervisor, Ms**, who has offered me valuable suggestions in the academic studies. In the preparation of this thesis，she has spent much time reading through each draft and provided me with inspiring advice. Without her patient instruction, insightful criticism and expert guidance, the completion of this thesis would not have been possible. Second, I also owe a special debt
of gratitude to all the professors in Foreign Languages Institute, from whose devoted teaching and enlightening lectures I have benefited a lot and academically prepared for the thesis. Last, I should finally like to express my gratitude to my beloved parents who have always been helping me out of difficulties and supporting without a word of complaint. 第2篇论文致谢词范文（英文版） I would like to express my gratitude to all those who helped me during the writing of this thesis. I gratefully acknowledge the help of my supervisor, Ms. Sun Yanlan, who has offered me valuable suggestions in the academic studies. In the preparation of the thesis，she has spent much time reading through each draft and provided me with inspiring advice. Without her patient instruction, insightful criticism and expert
机械类英语论文及翻译翻译
High-speed milling High-speed machining is an advanced manufacturing technology, different from the traditional processing methods. The spindle speed, cutting feed rate, cutting a small amount of units within the time of removal of material has increased three to six times. With high efficiency, high precision and high quality surface as the basic characteristics of the automobile industry, aerospace, mold manufacturing and instrumentation industry, such as access to a wide range of applications, has made significant economic benefits, is the contemporary importance of advanced manufacturing technology. For a long time, people die on the processing has been using a grinding or milling EDM (EDM) processing, grinding, polishing methods. Although the high hardness of the EDM machine parts, but the lower the productivity of its application is limited. With the development of high-speed processing technology, used to replace high-speed cutting, grinding and polishing process to die processing has become possible. To shorten the processing cycle, processing and reliable quality assurance, lower processing costs. 1 One of the advantages of high-speed machining High-speed machining as a die-efficient manufacturing, high-quality, low power consumption in an advanced manufacturing technology. In conventional machining in a series of problems has plagued by high-speed machining of the application have been resolved. 1.1 Increase productivity High-speed cutting of the spindle speed, feed rate compared withtraditional machining, in the nature of the leap, the metal removal rate increased 30 percent to 40 percent, cutting force reduced by 30 percent, the cutting tool life increased by 70% . Hardened parts can be processed, a fixture in many parts to be completed rough, semi-finishing and fine, and all other processes, the complex can reach parts of the surface quality requirements, thus increasing the processing productivity and competitiveness of products in the market. 1.2 Improve processing accuracy and surface quality High-speed machines generally have high rigidity and precision, and other characteristics, processing, cutting the depth of small, fast and feed, cutting force low, the workpiece to reduce heat distortion, and high precision machining, surface roughness small. Milling will be no high-speed processing and milling marks the surface so that the parts greatly enhance the quality of the surface. Processing Aluminum when up Ra0.40.6um, pieces of steel processing at up to Ra0.2 ~ 0.4um.
毕业设计中英文摘要
摘要 本毕业设计选取的题目是东天山小区2-1楼工程造价与施工组织设计。本工程负一层为半地下车库，地上六层，外加一阁楼层，建筑高度26.15m，建筑面积9119.7m2，结构形式为砖混结构。本毕业设计由工程造价、施工组织设计、工程项目管理、专题设计等四个部分组成。 第一部分工程造价。通过福莱一点通软件计算工程量，综合分析现行建筑市场的人工、材料、机械等市场价格，编制设计任务书规定范围的工程量定额报价和工程量清单报价。 第二部分施工组织设计。根据工程特点划分施工段，确定合理的施工顺序，选择主要分部分项工程施工方法和主要施工机械，根据工期要求编制合理施工进度计划表，并绘制施工平面图，以及采取有效的质量、安全等保证措施，例如安全文明施工措施、季节性施工措施等。 第三部分工程项目管理。包括工程进度、质量、造价三大控制以及工期索赔和项目管理机构设计。根据工期要求，在工程进度调整条件下，绘制调整后进度计划表并依据索赔程序，编制工期索赔文件。另外根据工程特点，确定本工程的质量、进度、造价等控制要点，进行项目管理机构设计。 第四部分专题设计。根据工程特点进行外脚手架计算和模板设计。并绘制脚手架设计图和模板设计图。 关键词：工程量计算；工程造价；施工方案；脚手架设计
Abstract The graduation design subject is Easten sky mountain district 2-1# building project cost and the construction organization design.The -1 layer of the project is a underground garage,there are 6 layers overground and a attic, the building is 26.15 meters tall and it’s construction area is 9119.7 square meters, the structure form is brick and concrete structure. the graduation design consists of four parts which are construction cost ,the construction organization design, project management and scaffolding template special design The first part is construction cost .The cost of construction project is calculated by Fly. Analysis the current price of labor, materials, machinery in the construction market and work out the Fixed price and the detailed list of engineering quantity price.choose construction measures of main component project and major machine, The second part is construction organization design. Devide the construction period according to the features of the project, make sure a reasonable construction sequence, Prepare the reasonable construction progress schedule on the basis of construction time limit, draw the construction plan chart and make some measures to protect the quality and safety of the project like safety civilized construction measures and seasonal construction measures. The third part is project management. It includes progress,quality and cost control,claim for extension of time and project management institutions desigh. Draw adjusted progress schedule in the progress of the projects under the condition of adjustment, Draw the construction plan chart, and prepare period claim document depend on the claim program. Make sure the project quality, progress, cost and control points and desigh project management mechanism. The fourth part is project design.Desigh the scaffold and template according to engineering characteristics and draw their figures. Key words: Quantity calculation ;Construction cost ; Construction method;Scaffold design
论文中英文摘要格式
附件2： 论文中英文摘要格式 作者姓名：陈骏 论文题目：钛酸铅基化合物晶体结构及其负热膨胀性 作者简介：陈骏，男，1979年8月出生；2001年9月在北京科技大学攻读冶金物理化学硕士学位，2003年9月提前攻读博士学位，一直师从北京科技大学邢献然教授，2007年3月获博士学位；2007年4月留在北京科技大学物理化学系，加入邢献然教授长江学者学术梯队从事教学科研工作；2008年得到德国洪堡博士后研究基金资助，在TU-Darmstadt继续开展钛酸铅基化合物相结构等方面的研究。读博士及其后的一年期间内，在国际著名期刊上发表第一作者论文12篇、第二作者论文5篇，作为主要研究人员获教育部科技奖励（自然科学奖）一等奖1项、授权专利2项；2008年获得北京市首届优秀博士论文称号。 中文摘要 钛酸铅（PbTiO3）是一种重要的钙钛矿结构的铁电体，在介电、压电、铁电、热释电等 方面具有重要的研究与应用价值；同时，它在室温至居里温度范围内还表现出奇特的热缩冷 胀行为，即负热膨胀性（NTE），这种负热膨胀行为是其它钙钛矿结构化合物所不具有的，如CaTiO3、BaTiO3、KNbO3、BiFeO3等。研究PbTiO3的负热膨胀性将有利于开发出负热膨胀性 可控以及零膨胀材料，拓展负热膨胀材料在实际中的应用，PbTiO3负热膨胀机理的研究可指 导新型负热膨胀材料的开发。本论文主要以钙钛矿结构的铁电化合物Pb1-x A x Ti1-y B y O3（A＝La、Sr、Cd、Bi、（La1/2K1/2）等；B＝Fe、Zn等不同价态金属原子）为中心，研究A位与B 位替代对其负热膨胀性、晶体结构、点阵动力学的影响，实现负热膨胀性能可控，开发零膨 胀材料，并研究PbTiO3负热膨胀机理。 本文研究了Pb1-x A x TiO3（A＝La、Sr、（La1/2K1/2）、Cd）体系的固溶体特性、晶体结构以 及负热膨胀性能受掺杂的影响。La、Sr、（La1/2K1/2）的掺杂都使PbTiO3的轴比（c/a）及居里 温度（T C）不同程度地线性下降，La的掺杂大幅度地降低了PbTiO3的负热膨胀性能，在0.15
英语毕业论文论文的英文致谢词
论文的英文致谢词 英语论文英文致谢篇一： I would like to express my gratitude to all those who have helped me during the writing of this thesis. I gratefully acknowledge the help of my supervisor Professor Zhu Jimei. I do appreciate her patience, encouragement, and professional instructions during my thesis writing. Also, I would like to thank Miss Wen Pingzhen and Miss Li Wenying, who kindly gave me a hand when I was making the questionnaire among the college English learners. Last but not the least, my gratitude also extends to my family who have been assisting, supporting and caring for me all of my life. 英语论文英文致谢篇二： I am greatly indebted to my supervisor, Professor Wang Shuting, for his valuable instructions and suggestions on my thesis as well as his careful reading of the manuscript. I feel grateful to all the teachers in the College of Foreign Languages of China University of Petroleum who once offered me valuable courses and advice during my study. My sincere thanks are also given to Pro.
Manufacturing Engineering and Technology(机械类英文文献+翻译)
Manufacturing Engineering and Technology—Machining Serope kalpakjian；Steven R.Schmid 机械工业出版社2004年3月第1版 20.9 MACHINABILITY The machinability of a material usually defined in terms of four factors: 1、Surface finish and integrity of the machined part; 2、Tool life obtained; 3、Force and power requirements; 4、Chip control. Thus, good machinability good surface finish and integrity, long tool life, and low force And power requirements. As for chip control, long and thin (stringy) cured chips, if not broken up, can severely interfere with the cutting operation by becoming entangled in the cutting zone. Because of the complex nature of cutting operations, it is difficult to establish relationships that quantitatively define the machinability of a material. In manufacturing plants, tool life and surface roughness are generally considered to be the most important factors in machinability. Although not used much any more, approximate machinability ratings are available in the example below. 20.9.1 Machinability Of Steels Because steels are among the most important engineering materials (as noted in Chapter 5), their machinability has been studied extensively. The machinability of steels has been mainly improved by adding lead and sulfur to obtain so-called free-machining steels. Resulfurized and Rephosphorized steels. Sulfur in steels forms manganese sulfide inclusions (second-phase particles), which act as stress raisers in the primary shear zone. As a result, the chips produced break up easily and are small; this improves machinability. The size, shape, distribution, and concentration of these inclusions significantly influence machinability. Elements such as tellurium and selenium, which are both chemically similar to sulfur, act as inclusion modifiers in
论文写作规范(中英文摘要及正文)-译文格式
要 随着时代的发展，人们对纺织品的要求也已经不再仅仅局限于实用。激烈的国际竞争逼使纺织企业采用高新 技术重视绿色工艺，开发环保产品则已成为新世纪市场竞争的新焦点。欧共体的Eco-label 倡导的是全生态的概念，欧盟委员会（2002/371/EC ）生态标准中，在纺织纤维中列出腈纶纤维的考核指标：原料纤维中丙烯腈的残留量应低于1.5mg/kg 。 丙烯腈是一种有毒物质，且有致癌作用。其极毒，对温血动物的毒性约为氰化氢的1/30。丙烯腈不仅蒸气有毒，而且附着于皮肤上也易经皮肤中毒。长时间吸入稀丙烯腈蒸气，则能引起恶心、呕吐、头痛、疲倦和不适等症状。由此可见，丙烯腈直接危害着人们的健康。 本文依照欧盟（2002/371/EC ）生态标准对腈纶纤维中丙烯腈残留量的控制，通过试验论证，确立了采用顶空固相微萃取和色质联用技术（HS —SPME —GC/MS ），由此建立腈纶纤维中丙烯腈残留量的测定方法。该方法具有操作简单，便捷，灵敏度高，准确性好的优点，而且仪器价格适中，便于推广。本文实验所使用的方法检测限低于0.5mg/kg ，回收率在86.2～ 关键词：腈纶，丙烯腈，残留量，气相色谱/质谱
competition, developing environmentally safe products has already become the new focus of the market competition in the new century. What Eco-label of European Community is advocated is all ecological concept , in the ecological standard of EU Committee (2002/371 / EC ), list the examination index of the fibre of the acrylic fibres in the dope-dyed fiber: The residue amount of the acrylonitrile should be lower than 1.5mg/kg in the raw materials fibre. The acrylonitrile is a kind of noxious substance extremely poisonous , the toxicity to the warm-blooded animal is about 1/30 of the hydrogen cyanide. Not only the vapour is poisonous for the acrylonitrile , but also adhere to the skin book of changes skin is poisonned. Suck the vapour of the rare acrylonitrile for a long time, can cause such symptoms as the nausea , vomitting , have a headache , tired and uncomfortable ,etc. . Therefore, the acrylonitrile is endangering people's health directly. Describe the HS-SPME-GC/MS procedure of determination method for acrylonitrile residue in acrylic fibre according to the limit control of European (2002/371/EC). The method provided very good linearity data. This method is easy to operate, highly sensitive and lower cost, easy to be extend. The limits of detection were below 0.5mg/kg, Acerage recovery between 86.2~98.6%.
2021年毕业论文致谢词中英文范例
毕业论文致谢词中英文范例 acknowledgements my deepest gratitude goes first and foremost to professor aaa , my supervisor, for her constant encouragement and guidan ___. she has walked me through all the stages of the writing of this thesis. without her consistent and illuminating instruction, this thesis could not havereached its present form. second, i would like to express my heartfelt gratitude to professor aaa, who led me into the world of translation. i am also greatly indebted to the professors and teachers at the department of english: professor dddd, professor ssss, who have instructed and helped me a lot in the past two years. last my thanks would go to my beloved family for their loving considerations and great confiden ___ in me all through these years. i also owe my sin ___re gratitude to my friends and my fellow class ___tes who gave me their
机械类英文文献
Available online at https://www.360docs.net/doc/678877398.html, Physica A334(2004)243–254 https://www.360docs.net/doc/678877398.html,/locate/physa Stability and transition in multiple production lines Takashi Nagatani? Department of Mechanical Engineering,Shizuoka University,Hamamatsu432-8561,Japan Received28October2003 Abstract We present the dynamical model of the multiple production lines composed of M parallel and u series machines.We extend the single-series production line model to the multiple production lines.We study the e ect of the multiple lines on the dynamical behavior of the production process.We apply the linear stability analysis to the production process in the multiple lines. The linear stability criterion is derived for the production system with the multiple lines.It is shown that the production process in the multiple lines is more unstable than that in the single line.The phase diagram(region map)is given for the multiple production lines.The nonlinear instability and dynamical transition are investigated by using computer simulation.It is shown that the dynamical transitions occur between the stable and oscillatory productions. c 2003Elsevier B.V.All rights reserved. PACS:05.90.+m;89.90.+m;89.40.+k Keywords:Production process;Instability;Dynamical transition;Transportation;Multiple lines 1.Introduction Concepts from statistical physics and nonlinear dynamics have been very successful in discovering and explaining dynamical phenomena in transportation systems[1–5]. Many of these phenomena are based on mechanisms such as delayed adaptation to changing conditions and competition for limited resources.The delayed adaptation is relevant for production systems as well[6–10].Mathematicians,physicists,tra c sci-entists,and economists have suggested that tra c dynamics has also implications for the dynamical behavior of production process. ?Fax:+81-53-478-1048. E-mail address:tmtnaga@ipc.shizuoka.ac.jp(T.Nagatani). 0378-4371/$-see front matter c 2003Elsevier B.V.All rights reserved. doi:10.1016/j.physa.2003.11.002