專業(yè)英語

前言

　　本教材是根據(jù)高中畢業(yè)3年制、兼顧2年制的高職高專教學(xué)計劃需要編寫而成的?！　≡诰帉懕緯鴷r，我們從高職教育的實(shí)際出發(fā)，結(jié)合專業(yè)英語的教學(xué)實(shí)踐，確定編寫的指導(dǎo)思想和教材特色為：從機(jī)械專業(yè)出發(fā)，循著機(jī)械制造過程的自然順序，由淺入深，由簡到繁，循序漸進(jìn)?！　”緯譃槲宕蟛糠?，共計45篇文章。所涉及的內(nèi)容包括：工程材料、熱處理、機(jī)械零件、機(jī)械加工及各類機(jī)床、切削原理、公差與配合、計算機(jī)輔助設(shè)計與制造、數(shù)控技術(shù)、機(jī)器人技術(shù)等。本書推薦學(xué)時為36學(xué)時，帶s號內(nèi)容可根據(jù)具體情況選用?！　”緯〔幕驹从谟?、美、澳大利亞文獻(xiàn)原著。為保持原著的語言風(fēng)格，編者對原文只做刪節(jié)，不做改寫。在每篇短文后，給出了文中生詞、詞組以及某些專業(yè)詞組，并對正文中一些疑難句子給出了注釋或參考譯文。短文后還給出部分思考題，供練習(xí)用。本書選材廣泛，語言規(guī)范，難度適中，便于自學(xué)?！　∪珪上暮缰骶帯５谝徊糠钟上暮绾蛯O振忠編寫，第二部分由許英姿編寫，第三部分由楊愛蘭編寫，第四部分由王延遐編寫，第五部分由夏虹編寫，最后由夏虹、許英姿、孫振忠定稿。本書在編寫過程中得到河南科技大學(xué)徐順利副教授的大力幫助和悉心審閱，并擔(dān)任了本書的主審。此外，還得到其他多方面人員的熱心支持，對此，我們表示由衷的感謝！　　由于水平有限，時間倉促，不足和錯漏之處在所難免，祈望讀者不吝賜教。

內(nèi)容概要

本書是根據(jù)高等職業(yè)技術(shù)教育教學(xué)的要求編寫的。全書共分4大部分，內(nèi)容包括：機(jī)械工程材料、機(jī)械零件、機(jī)械加工和各類機(jī)床以及現(xiàn)代加工制造技術(shù)，同時附加了產(chǎn)品說明書范例和參考譯文等內(nèi)容，以便于教學(xué)、自學(xué)和應(yīng)用。本書取材力求應(yīng)用面廣，并具有專業(yè)詞匯量和語言豐富、實(shí)用性強(qiáng)的特點(diǎn)，希望讀者借助本書的學(xué)習(xí)，能達(dá)到提高閱讀水平和應(yīng)用專業(yè)英語的目的。    本書可作為高等職業(yè)技術(shù)院校、高等院校?？?、成人教育學(xué)院、職工大學(xué)等大專層次的機(jī)械類專業(yè)英語課程的教材，也可作為廣大自學(xué)者和工程技術(shù)人員的參考用書。

書籍目錄

第2版前言第1版前言 Part 1 Fundamentals of Manufacturing 　Unit 1 Definition of Manufacturing 　Unit 2 Design Materials and Production 　Unit 3 Engineering Materials 　Unit 4 Classification of Materials 　Unit 5 Properties of Materials 　Unit 6 Heat Treatment and Hot Working of Metals 　Unit 7 Mechanics 　Unit 8 Measurement 　Unit 9 Inspection and Quality Control Part 2 Mechanical Parts 　Unit 10 Link and Joint 　Unit 11 Power Screws 　Unit 12 Clutches 　Unit 13 Engine Parts 　Unit 14 Gears 　Unit 15　Gear Manufacture　Unit 16  Shafts　Unit 17  Springs  　Unit 18  Bett Drives　Unit 19  Bearings　Unit 20  Cams　Unit 21　Turbine Engine Bearings for Ultra-High Temperatures　Unit 22  CouplingsPart 3  Manufacturing　Unit 23  Shaping and Planning Operations　Unit 24  Grinding Machines　Unit 25  Casting　Unit 26  Die Casting and Investment (or Lost Wax) Casting　Unit 27  Metal Cutting　Unit 28  Fundamentals of Manufacturing Accuracy　Unit 29  Surface RoughnessPart 4  New Technologies in Manufacturing　Unit 30  Numerical Control (NC)　Unit 31  CAD / CAM　Unit 32  Scope of CAD/CAM　Unit 33  Computer-Integrated Manufacturing　Unit 34  Robots　Unit 35  Machining Center　Unit 36  List of Various Mcchatronic Systems　Unit 37  Mechanical Engineering in the Information Age產(chǎn)品說明書范例參考譯文詞匯表參考文獻(xiàn)

章節(jié)摘錄

　　Ductility is a property that enables a material to be bent, drawn, stretched, formed, or permanently distorted without rupture. A material that has high ductility will not be brittle or very hard. Hard materials, on the other hand, are usually brittle and lack ductility. Impact and Endurance Testing　　A metal may be very hard and have a high tensile strength yet be totally unacceptable for a use that requires it to withstand impact or sudden load. There are a number of tests that can be used to determine the impact capability of a metal, but the test most generally used is the Chary test, Figure 1-3 shows a notched specimen that is struck by an anvil.　　The energy in foot-pounds requited to break the specimen is an indication of the impact resistance of the metal.　　The yield strength of metals can be used in designing parts that will withstand a static load, but for cyclic or repetitive loading the endurance or fatigue strength is useful. An endurance test is made by loading the part and subjecting it to repetitive stress. Figure 1-3 shows one way that the endurance or fatigue strength of a material may be found. Generally, a number of specimens of a metal are tested at various loading and the numbers of cycles to failure are noted. A curve of stress in pounds per square inch versus the number of cycles to failure is plotted, and these data can be used for designs involving repetitive loading. Hardness　　Although there are several techniques for determining the hardness of a material, most industrial methods measure the resistance to penetration of a small sphere, cone, or pyramid. Figure 1-3 shows a penetration hardness tester.　　The first step in obtaining a reading is to force the penetrator and material into contact with the specimen with a predetermined initial load. Then an increased load is applied to the penetrator, and the hardness reading is obtained by noting the difference in penetration caused by the final load as compared to the initial load.

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