機(jī)電專業(yè)英語

前言

　　制造業(yè)產(chǎn)品在高端領(lǐng)域不能形成很強(qiáng)的競(jìng)爭(zhēng)力的一個(gè)很重要原因是缺少高素質(zhì)技術(shù)工人，這嚴(yán)重制約高技術(shù)領(lǐng)域的產(chǎn)業(yè)化進(jìn)程，削弱制造業(yè)的競(jìng)爭(zhēng)力，是制造業(yè)大而不強(qiáng)的重要原因。高素質(zhì)技術(shù)工人應(yīng)該是既懂技術(shù)又懂英語，因?yàn)橐畲笮实乩煤孟冗M(jìn)的進(jìn)口設(shè)備，技術(shù)工人必須懂專業(yè)英語，因此，對(duì)于高級(jí)技工學(xué)校的學(xué)生來說學(xué)好專業(yè)英語是非常必要的。然而目前學(xué)校的實(shí)際情況是：學(xué)生學(xué)好專業(yè)英語存在諸多困難。原因之一是學(xué)生的英語基礎(chǔ)比較差，原因之二是所選的教材太難，不符合學(xué)生的實(shí)際水平，原因之三是教材在選材上沒有緊跟專業(yè)的最新進(jìn)展。基于此，我們組織了技工院校多年從事專業(yè)英語教學(xué)的一線教師編寫了本書?！　”緯拇蟛糠治恼戮x自歐美原版英語教材和國(guó)際著名公司網(wǎng)站提供的技術(shù)資料。本書由機(jī)械工程技術(shù)模塊、數(shù)控技術(shù)模塊、電氣自動(dòng)化技術(shù)模塊三部分組成。內(nèi)容主要包括工程制圖、Pro／ENGINEER的使用、UG的設(shè)計(jì)與加工模塊、量規(guī)、公差與配合、正確開動(dòng)車床、夾具、磨削加工、注射成型、沖壓模具的結(jié)構(gòu)、數(shù)控機(jī)床的類型及維護(hù)和保養(yǎng)、FANUC系統(tǒng)的操作面板、如何編程、特種加工、快速原型制造、萬用表及示波器的使用、變壓器、直流發(fā)電機(jī)、步進(jìn)電機(jī)、PLC、電網(wǎng)結(jié)構(gòu)等。通過本課程的學(xué)習(xí)將使讀者具備閱讀專業(yè)英語文獻(xiàn)的基本技能，幫助讀者擴(kuò)大專業(yè)英語詞匯量，提高讀者在生產(chǎn)實(shí)踐中充分利用好進(jìn)口設(shè)備的能力?！　”緯倪x材難度盡量貼近讀者英語水平，對(duì)復(fù)雜句子作了詳細(xì)的語法結(jié)構(gòu)分析和翻譯。在課文內(nèi)容選擇上，本書以實(shí)用性和適應(yīng)性為出發(fā)點(diǎn)，即適應(yīng)當(dāng)前技工學(xué)校高級(jí)工班學(xué)生的需要，選材時(shí)做到篇幅適中、圖文并茂。并針對(duì)學(xué)生今后要從事的工作，使學(xué)生做到學(xué)以致用。本書的每個(gè)單元都由課文、生詞和短語、注釋、練習(xí)、閱讀材料等部分組成。閱讀材料內(nèi)容豐富，是對(duì)正文的拓展。

內(nèi)容概要

本書由機(jī)械工程技術(shù)模塊、數(shù)控技術(shù)模塊、電氣自動(dòng)化技術(shù)模塊三部分組成，每個(gè)模塊含10個(gè)單元，每個(gè)單元包括課文、生詞與短語、注釋、練習(xí)和閱讀材料。教材內(nèi)容大部分選自歐美原版英語教材和國(guó)際著名公司網(wǎng)站提供的技術(shù)資料，所選題材結(jié)合技工院校學(xué)生實(shí)際情況。本書圖文并茂，且對(duì)大部分生詞標(biāo)注了音標(biāo)，同時(shí)對(duì)復(fù)雜句子作了詳細(xì)的語法結(jié)構(gòu)分析和翻譯，有利于提高學(xué)生的英語閱讀水平。　　本書可作為技校、技師學(xué)院和職業(yè)院校機(jī)電、數(shù)控類專業(yè)教材，也適合生產(chǎn)一線工人自學(xué)及培訓(xùn)之用。

書籍目錄

Module 1　Mechanical Engineering Technology　　Lesson 1　Reading Drawing　　Lesson 2　Tool Bit Materials　　Lesson 3　Protrusions and Cuts　　Lesson 4　Dial Indicating Instruments　　Lesson 5　Fits　　Lesson 6　Operating the Machine Controls　　Lesson 7　Work-Holding Methods and Standard Setups　　Lesson 8　Grinding and Abrasive Machining Processes　　Lesson 9　Injection Molding　　Lesson 10　Die Components　Module 2　CNC Technology　　Lesson 11　CNC Machines　　Lesson 12　Motion Control——the Heart of CNC　　Lesson 13　FANUC System Operation Unit——CRT/MDI Panel　　Lesson 14　Troubleshooting and Maintenance for CNC Machine　　Lesson 15　CAD/CAM　　Lesson 16　CNC Program　　Lesson 17　Advantages of CNC　　Lesson 18　G-Code　　Lesson 19　Special Machining　　Lesson 20　Rapid Prototyping　Module 3　Electric Automation Technology　　Lesson 21　Voltage　　Lesson 22　Basic Circuit Measurements　　Lesson 23　Ohm's Law　　Lesson 24　Kirchhoff's Voltage Law　　Lesson 25　A DC Generator　　Lesson 26　Oscilloscope Controls　　Lesson 27　The Basic Transformer　　Lesson 28　Programmable Logic Controller　　Lesson 29　Variable-Reluctance Stepper Motors　　Lesson 30　Power Network Structure　參考文獻(xiàn)

章節(jié)摘錄

　　All of this relates to the task of setting up and using the horizontal spindle surface grinder.It is atthis point that you start putting together a large number of variables that through your skill andobservation can result in an accurate workpiece.As the operator,you will have more control of theoutcome in surface grinding than in nearly any other portion of the machinist's trade.This is also wherethe wheel selection and preparation：l~ocess are put to the test.　　In surface grinding，it is necessary to reverse one of the more usual principles of machining used inmost of the other chip-making processes.In both turning.and milling for metal cutting volume，the machinist：tries to keep the depth of cut to a maximum,adiusting all,the other variables such as speed sand feeds to match that concept.In surface grinding，the important,thing is to match the actions of work piece speed，crossfeed,and downfeed to keep the grinding action as consistent as possible，while at the same time avoiding damage to the workpiece.The example used in this unit will be in the grinding of a vee block,but before beginning with that，some other generalities about horizontal spindle surface grinding should be considered.　　Starting with a broad surface of a soft steel like AISI 1018，a suitable selection of wheel and grinding variables would be as follows：An aluminum oxide abrasive，of 46 grit sizes in a J bondhardness.The bond itself is vitrified.Tlae wheel speed for vitrified wheels is usually from 5500 to 6500sfpm；the table speed would be 50 to 100 Sfpm.The-crossfeed rate would be 0.050 to 0.500 in.per pass,with a maximum being one.fourth the wheel width.For roughing，the downfeed would be o.003 in。，andfor finishing，0.001 in.maximum.　　If the salne AISI 1018 material were pack hardened（carburized）to about 55 Rockwell C，how would this change the initial recommendations？The wheel speed and the table speed would remain the same.The abrasive chosen a.nd the grit size would also remain the same，but the bond selected would beone grade softer,or I bond.The roughing downfeed would change to 0.002 in，and the finishing to0.0005 in.The greatest change in recommendation other than the grade of the wheel would be in the way that the cross feeding is done.Here the recommendation would be 0.025 to 0.250 in with one-tenth of the wheel width taken as a maximum.All of these recommendations are based on a sharp wheel prepared with a dresser that is in good condition.If the dressing is done incorrectly so that the wheel is dulled'it could make the recommendations useless.　　A general observation in horizontal surface grinding is to keep the cross feed travel as large as possible，and the downfeed adjustments matched so that you cannot hear a significant change in grinding wheel speed during the work's traverse under the wheel.This procedure helps to keep，the surface of the wheel parallel to the spindle and avoids excessive dressing，providing the grade and abrasive fiiabilityare correctly matched to the work piece needs.　　……

編輯推薦

　　《機(jī)電專業(yè)英語》選材合適，注重閱讀能力的培養(yǎng)；難易適中，符合多數(shù)學(xué)生的基礎(chǔ)；安排合理，充分體現(xiàn)模塊化教學(xué)。

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