數(shù)控技術(shù)專業(yè)英語

內(nèi)容概要

《數(shù)控技術(shù)專業(yè)英語》是新世紀(jì)高職高專教材編審委員會組編的數(shù)控技術(shù)應(yīng)用類課程規(guī)劃教材之一。    本教材旨在使學(xué)生熟悉數(shù)控加工工藝、數(shù)控編程、數(shù)控機床操作與維護中常見的英文，為學(xué)生今后閱讀相關(guān)的說明書及資料，掌握數(shù)控編程和操作及進一步學(xué)習(xí)打下良好的英語基礎(chǔ)；本教材綜合應(yīng)用部分的內(nèi)容能夠拓寬學(xué)生的視野，有利于學(xué)生就業(yè)。    本教材在編寫過程中力求突出以下特點：    1、課文選取緊密結(jié)合專業(yè)課教學(xué)內(nèi)容，篇幅適度，難易適中。    2、精度部分由課文、詞匯、注釋、練習(xí)題等部分組成，每篇精讀課文都有參考譯文，練習(xí)題配有參考答案。    3、泛讀內(nèi)容與精讀課文一一對應(yīng)，方便有興趣學(xué)生進一步學(xué)習(xí)。    4、根據(jù)課文內(nèi)容，選擇恰當(dāng)?shù)膱D片，使教材圖文并茂，有助于學(xué)生更直觀地理解教學(xué)內(nèi)容。    5、附錄中列出了常用地G代碼、M代碼、縮略語和數(shù)控加工常用詞匯，方便學(xué)生查找與使用。    本教材共分為四各單元，分別使數(shù)控加工工藝、數(shù)控編程、數(shù)控機床操作與維護以及綜合應(yīng)用。

書籍目錄

Unit One  Technics of CNC Machining  1.1 Cutting Tools  1.2 Cutting Dosages  1.3 Usages of Measuring ToolsUnit Two  CNC Program  2.1 Basic CNC Program  2.2 Program Code  2.3 Application of CNC ProgramUnit Three    CNC Machines' Operation and Maintenance  3.1 CNC Machines  3.2 CNC Machines' Panel and Screen Reading  3.3 CNC Operation  3.4 NC Electrical Discharge Machining  3.5 Maintenance Troubileshooting and Safety Nores of CNC MachineUnit Four   Integrated Applications  4.1 Application of CAD/ CAM Software  4.2 At CIMT  4.3 Applying for a Job   4.4 DialogueAppendix A  G-Codes and M-Codes for FANUC CNC Milling MachineAppendix B  AbbreviationsAppendix C  Technical phrases參考文獻

章節(jié)摘錄

　　Cermets （from the words ceramic and metal） were first used in the early 1950s and consist of ceramic particles in a metallic matrix. They were introduced in the 1960s and are black or hot-pressed ceramics.　　Typical cermets consist of 70% aluminium oxide and 30% titanium carbide; other cermets contain molybdenum carbide, niobium carbide, and tantalum carbide. Although they have chemical stability and resistance to built-up-edge formation, the brittleness and high cost of cermets have been a limitation to their wider use.　Further refinements of these tools have resulted in improved strength, toughness, and reliability.　Their performance is somewhere between that of ceramics and carbides and has been particularly suitable for light roughing cuts and high-speed finiShing cuts, chipbreaker features are important for cermets inserts. Although they can be coated, the benefits of coated cermets are somewhat controversial, as the improvement in wear resistance appears to be marginal.　　There are three basic types of metal cutting tools : singlepoint tools, multipoint tools and abrasivesTM. A singlepoint metal cutting tool has a single cutting edge and is used for turning, boring, shaping and planning. The most common machine tools have two or more cutting edges such as drills, reamers and milling cutters. The cutting edge is that part of the tool where cutting is actually done. Grinding wheels are an example of abrasive cutting tools. Each grinding wheel has a lot of abrasive grains, which act as very cutting tools.

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