數(shù)控技術(shù)英語

前言

　　專門用途英語系列教材是教育部規(guī)劃的高等學(xué)校專業(yè)英語階段的英語教材。本系列教材從培養(yǎng)高級(jí)應(yīng)用型人才的總體目標(biāo)出發(fā)，結(jié)合學(xué)生畢業(yè)后的工作實(shí)際，力求向?qū)W生提供其未來工作崗位所需要的專業(yè)英語知識(shí)和技能，培養(yǎng)學(xué)生使用涉外業(yè)務(wù)英語的能力。　　本系列教材每冊(cè)書都由10個(gè)單元組成，每單元包括閱讀與翻譯、模擬套寫和聽力與會(huì)話等內(nèi)容?！　”鞠盗薪滩闹饕└叩仍盒＃òǜ叩葘？圃盒：透叩嚷殬I(yè)院校）專業(yè)英語教學(xué)使用，也可供電大、各類成人院校及廣大專業(yè)人員學(xué)習(xí)專業(yè)英語，提高涉外業(yè)務(wù)交際能力使用?！　　稊?shù)控技術(shù)英語》是本系列教材中的一種，是根據(jù)《高職高專教育英語課程教學(xué)基本要求（試行）》組織編寫的?！　　稊?shù)控技術(shù)英語》編寫的宗旨是以人才市場(chǎng)為導(dǎo)向，以提高學(xué)生的職業(yè)能力和職業(yè)素質(zhì)為目的，結(jié)合專業(yè)英語的特點(diǎn)，編寫出機(jī)械工程，尤其是數(shù)控技術(shù)方面的專業(yè)英語。本書突出數(shù)控專業(yè)的詞語和用法，以典型數(shù)控系統(tǒng)的編程和操作英文說明書為主要參考文獻(xiàn)，以英文閱讀理解、翻譯和資料查詢?yōu)橹攸c(diǎn)，使學(xué)生獲得閱讀和查閱數(shù)控機(jī)床、數(shù)控系統(tǒng)操作與編程英文說明書等的能力?！　”窘滩墓?0個(gè)單元，供一個(gè)學(xué)期使用。每個(gè)單元包括5個(gè)部分：　　第一部分為“專業(yè)閱讀”（Tecl"micalandPracticalReading），旨在培養(yǎng)學(xué)生閱讀數(shù)控專業(yè)英語的能力。本部分包括兩篇文章，所收入的文章能闡述當(dāng)今數(shù)控專業(yè)方面的最新高科技機(jī)床和加工工藝等，同時(shí)配有一些先進(jìn)的數(shù)控機(jī)床照片?！　〉诙糠譃椤傲私饪刂泼姘濉保℅lanceataControlConsole），目的是要求學(xué)生能弄懂?dāng)?shù)控機(jī)床的操作面板的功能使用。當(dāng)今數(shù)控機(jī)床千變?nèi)f化：但其操作面板變化不是大的，只要學(xué)生了解了面板上每個(gè)鍵的功能與作用，就能在工廠實(shí)際中得以應(yīng)用?！　〉谌糠譃椤澳M套寫”（SimulatedWriting），它包括兩部分，SectionA為數(shù)控常用故障診斷：SectionB為數(shù)控小零件程序設(shè)計(jì)。旨在培養(yǎng)學(xué)生根據(jù)所學(xué)數(shù)控專業(yè)知識(shí)，直接參照范例進(jìn)行套寫、擬寫和翻譯產(chǎn)品廣告、機(jī)床說明書、數(shù)控系統(tǒng)操作與編程說明書等應(yīng)用文?！　〉谒牟糠譃椤敖浑H會(huì)話”（CommunicativeSpeaking），旨在培養(yǎng)學(xué)生的專業(yè)英語的口頭交際能力。

內(nèi)容概要

　　《數(shù)控技術(shù)英語》是該系列教材之一，旨在提高數(shù)控類專業(yè)學(xué)生和數(shù)控行業(yè)從業(yè)人員學(xué)習(xí)專業(yè)英語及涉外業(yè)務(wù)人員的交際能力。專門用途英語系列教材是教育部規(guī)劃的高等學(xué)校（包括高等?？圃盒：透叩嚷殬I(yè)院校）專業(yè)英語階段的英語教材，也可供電大、各類成人院校及廣大專業(yè)人員學(xué)習(xí)專業(yè)英語、提高涉外業(yè)務(wù)交際能力使用?！　　稊?shù)控技術(shù)英語》是根據(jù)《高職高專教育英語課程教學(xué)基本要求（試行）》組織編寫的。依照高職高專的培養(yǎng)目標(biāo)及其教學(xué)的實(shí)際情況，《數(shù)控技術(shù)英語》更注重“邊學(xué)邊用，學(xué)用結(jié)合”的原則。內(nèi)容系統(tǒng)、全面，難點(diǎn)、重點(diǎn)突出，并力求實(shí)用、先進(jìn)、通俗、易懂?！　∪珪?0個(gè)單元，每個(gè)單元都加入了-些與工廠緊密結(jié)合的實(shí)用英語例題，同時(shí)還設(shè)有數(shù)控實(shí)用英語對(duì)話等，書后附有練習(xí)參考答案和課文參考譯文?！　　稊?shù)控技術(shù)英語》既可作為高職、高專、成人高校及本科院校的數(shù)控技術(shù)及應(yīng)用、機(jī)電一體化等專業(yè)的專業(yè)英語教材，也可用作企業(yè)培訓(xùn)的教材，或相關(guān)專業(yè)教師、學(xué)生及技術(shù)人員的學(xué)習(xí)參考書。

書籍目錄

Unit 1 Introduction to Nlumerical ControlPart l Technical and Practical ReadingPassage A： Fundamentals of Numerical ControlPassage B： Use of Microcomputers in NC SystemsPart II Glance at a Control ConsolePart III Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： At the CNC Machine Tools FactoryPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 2 Introduction to Computerized Numerical ControlPart I Technical and Practical ReadingPassage A： Numerical Control （NC） and Computerized Numerical Control （CNC）Passage B： Computerized Numerical ControlPart II Glance at a Control ConsolePart III Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： About CNC Machine ToolsPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 3 Features of Numerical Control Machining ToolsPart I Technical and Practical ReadingPassage A： Operations of NC Machining ToolsPassage B： Machining CentersPart II Glance at a Control ConsolePart III Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： Technical Consultations on CNC Machine ToolsPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 4 Numerical Control part programmingPart I Technical and Practical ReadingPassage A： Introduction to Numerical Control Part ProgrammingPassage B： Other Programming SystemsPart II Glance at a Control ConsolePart Ill Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： Information Exchange on CNC Machine ToolsPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 5 Operating KegulationsPart I Technical and Practical ReadingPassage A： Regulations and Cautions Related to CNC Machine ToolsPassage B： Rules and Cautions Related to ProgrammingPart II Glance at a Control ConsolePart III Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： How to Operate CNC Machine ToolsPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 6 Failure Diagnostics and RepairPart l Technical and Practical ReadingPassage A： Todays CNC Diagnostics and Repair （1）Passage B： Todays CNC Diagnostics and Repair （2）Part II Glance at a Control ConsolePart III Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： CNC Machine Tools RepairPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 7 CNC Machine Tools MaintenancePart I Technical and Practical ReadingPassage A： New Era of CNC Maintenance Is PC-BasedPassage B： Open-loop and Closed-loop ControlPart II Glance at a Control ConsolePart III Simulated Writing Section A： Common Failure DiagnosticsSection B： Have a TryPart IV Communicative Speaking： Maintenance of CNC Machine ToolsPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUnit 8 Field Personnel MrainingPart I Technical and Practical ReadinaPassage A： Training to Operate CNC Machine ToolsPassage B： CNC Maintenance TrainingPart II　Glance at a Control ConsolePart IIISimulated WritingSection A： Common Failure DiagnosticsSection B： Have a TryPart IV CommunicativeSpeaking： FieldPersonnel TrainingPart V　Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUint 9　 gndustrial RobotsPart I　 Technical andPractical ReadingPassage A： Basic Concepts in RoboticsPassage B： Analog and Digital TransducersPart II　Glance at a Control ConsolePart IIISimulated WritingSection A： Common Failure DiagnosticsSection B： Have a TryPart IV CommunicativeSpeaking： Talking About Industrial RobotsPart V Broaden Your Horizon —— Get to Know More of the World Famous CompaniesUint 10 eAD/EAMSystemPart I Technical andPractical ReadingPassage A： The CAD/CAM ConceptPassage B： IndustrialPCsPart II Glance at a Control ConsolePart IIISimulated WritingSection A： Common Failure DiagnosticsSection B： Have a TryPart IV CommunicativeSpeaking： Talking About CAD and CAMPart V Broaden Your Horizon —— Get to Know More of the World Famous Companiesglossaryfist of Abbreviations參考答案和譯文

章節(jié)摘錄

　　The use of microcomputers in NC systems is well established. Briefly, the variable to be controlled （temperature, position, etc.） is monitored and the output from the sensor monitoring this variable subtracted from a reference signal. The different signal resulting from the comparator is a measure of error, called the actuating signal, which is used as an input to the process.　　A microcomputer can be used as the controller, which is referred to as direct digital control （DDC）.t The motor speed is the variable to be con- trolled. The tachometer acts as a speed transducer, generating a voltage proportional to speed. The comparator is an electronic device. If the speed is low for any reason, the actuating signal is positive, causing the amplifier to feed more current to the motor which increases the torque and therefore the speed. If the speed is too high the actuating signal is negative and the motor reduces torque and slows down. Clearly a stable operating speed will be reached when the tacho-voltage is roughly equal to the reference voltage.　　The advantages to be gained from the use of microcomputers are （1） regulation against unwanted disturbances; （2） indirect control of what may be a high power by the low power reference signal; （3） a reduction in the undesirable effects of nonlinearities.　　The output from the transducer is sampled at regular intervals of time close enough together so that the output cannot change appreciably between samples. This information is converted to the binary form by an ADC2 and stored by the computer. And the reading entered into the computer is used.by a program which subtracts it from a reference number to create a digital equivalent. This number is the output from the computer to a DAC3 which produces a proportional voltage which stays constant until reset.

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