机电工程专业英语

章节摘录

　　Lesson 4　Machine Parts （II）　　Fastener　　Fasteners are devices which permit one part to be joined to a second part and， hence， theyare involved in almost all designs.　　There are three main classifications of fasteners， which are described as follows：　　（1）Removable. This type permits the parts to be readily disconnected without damagingthe fastener. An example is the ordinary nut-and-bolt fastener.　　（2）Semi permanent. For this type， the parts can be disconnected， but some damage usuallyoccurs to the fastener. One such example is a corer pin.　　（3）Permanent. When this type of fastener is used， it is intended that the parts will never bedisassembled. Examples are riveted joints and welded joints.　　The importance of fasteners can be realized when referring to any complex product. In the case of the automobile， there are literally thousands of parts which are fastened together top roduce the total product. The failure or loosening of a single fastener could result in a simple nuisance such as a door rattle or in a serious situation such as a wheel coming off. Suchpossibilities must be taken into account in the selection of the type of fastener for the specific application.　　Nuts， bolts， and screws are undoubtedly the most common means of joining materials. Since they are so widely used， it is essential that these fasteners attain maximum effectiveness at the lowest possible cost.　　An ordinary nut loosens when the forces of vibration overcome those of friction. In a nut and lock washer combination， the lock washer supplies an independent locking feature preventing the nut from. loosening. The lock washer is useful only when the bolt might loos enbecause of a relative change between the length of the bolt and the parts assembled by it. [2]This change in the length of the bolt can be caused by a number of factors-creep in the bolt， loss of resilience， difference in thermal expansion between the bolt and the bolted members， or wear. In the above static cases， the expanding lock washer holds the nut under axial load and keeps the assembly tight. When relative changes are caused by vibration forces， the lock washer is not nearly as effective.　　Rivets are permanent fasteners.

书籍目录

Lesson 1  Introduction to Mechanical Design  1.1  Text  1.2  Words and Phrases  1.3  Complex Sentence Analysis  1.4  Exercise  1.4.1  Translate the following paragraphs  1.4.2  Choose the proper answer to fill in the blank and translate the sentencesLesson 2  Mechanisms  2.1  Text    2.2  Words and Phrases   2.3  Complex Sentence Analysis  2.4  ExerciseLesson 3  Machine Parts (I)  3.1  Text  3.2  Words and Phrases  3.3  Complex Sentence Analysis  3.4  Exercise  3.4.1  Translate the Following paragraphs  3.4.2  Write the name of the following parts and brief description of the roller chain on the structure and assembly relationsLesson 4  Machine Parts (ll)  4.1  Text  i  4.2  Words and Phrases  4.3  Complex Sentence Analysis  4.4  ExerciseLesson 5  Engineering Graphic in the Third-angle Projection  5.1  Text  5.2  Words and Phrases  5.3  Complex Sentence Analysis  5.4  ExerciseLesson 6  Introduction to CAD/CAM/CAPP  6.1  Text  6.2  Words and Phrases  6.3  Complex Sentence Analysis  6.4  ExerciseLesson 7 A Discussion on Modern Design Optimization  7.1  Text  7.2  Words and Phrases  7.3  Complex Sentence Analysis  7.4  ExerciseLesson 8  Using Dynamic Simulation in the Development of Construction Machinery  8.1  Text  8.2  Words and Phrases  8.3  Complex Sentence Analysis  8.4  Exercise Lesson 9  Engineering Tolerance  9.1  Text   9.2  Words and Phrases    9.3  Complex Sentence Analysis  9.4  Exercise Lesson 10  Numerical Control  10.1  Text    10.2  Words and Phrases  10.3  Complex Sentence Analysis  10.4  ExerciseLesson 11  Introduction to Heat Pipe Technology in Machining Process..  11.1  Text  11.2  Words and Phrases  11.3  Complex Sentence Analysis  11.4  ExerciseLesson 12  Introduction to Material Forming  12.1  Text  12.2  Words and Phrases  12.3  Complex Sentence Analysis  12.4  ExerciseLesson 13  Material Forming Processes   13.1  Text  13.2  Words and Phrases  13.3  Complex Sentence AnalysisLesson 14  Introduction to Mould  14.1  Text  14.2  Words and Phrases  14.3  Complex Sentence Analysis  14.4  ExerciseLesson 15  Mould Design and Manufacturing  15.1  Text  15.2  Words and Phrases  15.3  Complex Sentence Analysis  15.4  ExerciseLesson 16  Heat Yreatmefit of Metal  16.1  Text  16.2  Words and Phrases  16.3  Complex Sentence Analysis  16.4  ExerciseLesson 17 Virtual Manufacturing  17.1  Text  17.2  Words and Phrases  17.3  Complex Sentence Analysis  17.4  ExerciseLesson 18  Fluid and Hydraulic System  18.1  Text  18.2  Words and Phrases  18.3  Complex Sentence Analysis  18.4  ExerciseLesson 19  Product Test and Quality Control  19.1  Text  19.2  Words and Phrases  19.3  Complex Sentence Analysis  19.4  ExerciseLesson 20  Introduction of Automobile Engine  20.1  Text  20.2  Words and Phrases  20.3  Complex Sentence Analysis  20.4  ExerciseLesson 21  The Automobile Components  21.1  Text  21.2  Words and Phrases  21.3  Complex Sentence Analysis  21.4  ExerciseLesson 22  Mechatronics  22.1  Text  22.2  Words and Phrases  22.3  Complex Sentence Analysis  22.4  ExerciseLesson 23  Industrial Robots  23.1  Text  23.2  Words and Phrases    23.3  Complex Sentence Analysis  23.4  Exercise Lesson 24 An Army of Small Robots  24.1  Text  24.2  Words and Phrases  24.3  Complex Sentence Analysis  24.4  ExerciseLesson 25  Introduction to MEMS  25.1  Text  25.2  Words and Phrases  25.3  Complex Sentence Analysis  25.4  ExerciseLesson 26  Dialogue--At CIMT  26.1  Text  26.2  Words and Phrases  26.3  Complex Sentence Analysis  26.4  ExerciseLesson 27  How to Write a Scientific Paper  27.1  Text  27.2  Words and Phrases  27.3  Complex Sentence Analysis  27.4  Exercise附录A  关于科技英语翻译 附录B  怎样写科技论文的英文摘要 附录C  课文参考译文 参考文献

编辑推荐

　　根据最新就业行情和相关行业标准，对原版内容进行合理调整或重大修改，使之更能符合知识的更新，反映学科现代最新理论、新技术、新材料和新工艺。　　定位更加准确，大量增加相应工程实例，在保证内容反映国内外机械学科最新发展的基础上，满足高等院校的机械类专业教学要求。　　注重各学科基本理论，又注重现行设计方法的理论依据和工程背景，面向就业，培养学生创新能力和职业素质。　　配有大量实物照片和较多三维模拟图表达机械设备的实体结构和线框结构，包括零件图、装配图和爆炸图，形象生动，使内容表达更加直观易懂。　　力求写作风格新，内容新，使学生对教材不产生畏难情绪，增强教材的可读性，突出实用性和可操作性。

作者简介

《机电工程专业英语(第2版)》共有27篇课文，主要内容包括机械设计制造技术、机械工程材料、公差与配合、数控技术、机电一体化技术、材料成形、模具设计与制造、汽车工程和科技写作等方面的专业英语知识。同时，为了反应本学科的发展趋势，又增添了微机械(MEMS)设计技术和热管工程应用技术方面的内容。书后附有科技英语翻译及写作的简单介绍，还附有课文参考译文。

《机电工程专业英语(第2版)》适合作为机械设计制造及自动化、机械工程及自动化、机电工程等专业的专业英语教材，也可以供从事机械工程各专业工作的工程技术人员参考使用。

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