數(shù)控技術英語

前言

　　專門用途英語系列教材是教育部規(guī)劃的高等學校專業(yè)英語階段的英語教材。本系列教材從培養(yǎng)高級應用型人才的總體目標出發(fā)，結合學生畢業(yè)后的工作實際，力求向學生提供其未來工作崗位所需要的專業(yè)英語知識和技能，培養(yǎng)學生使用涉外業(yè)務英語的能力?！　”鞠盗薪滩拿績詴加?0個單元組成，每單元包括閱讀與翻譯、模擬套寫和聽力與會話等內容。　　本系列教材主要供高等院校（包括高等專科院校和高等職業(yè)院校）專業(yè)英語教學使用，也可供電大、各類成人院校及廣大專業(yè)人員學習專業(yè)英語，提高涉外業(yè)務交際能力使用?！　　稊?shù)控技術英語》是本系列教材中的一種，是根據《高職高專教育英語課程教學基本要求（試行）》組織編寫的?！　　稊?shù)控技術英語》編寫的宗旨是以人才市場為導向，以提高學生的職業(yè)能力和職業(yè)素質為目的，結合專業(yè)英語的特點，編寫出機械工程，尤其是數(shù)控技術方面的專業(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，以英文閱讀理解、翻譯和資料查詢?yōu)橹攸c，使學生獲得閱讀和查閱數(shù)控機床、數(shù)控系統(tǒng)操作與編程英文說明書等的能力?！　”窘滩墓?0個單元，供一個學期使用。每個單元包括5個部分：　　第一部分為“專業(yè)閱讀”（Tecl"micalandPracticalReading），旨在培養(yǎng)學生閱讀數(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今數(shù)控專業(yè)方面的最新高科技機床和加工工藝等，同時配有一些先進的數(shù)控機床照片?！　〉诙糠譃椤傲私饪刂泼姘濉保℅lanceataControlConsole），目的是要求學生能弄懂數(shù)控機床的操作面板的功能使用。當今數(shù)控機床千變萬化：但其操作面板變化不是大的，只要學生了解了面板上每個鍵的功能與作用，就能在工廠實際中得以應用?！　〉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)控小零件程序設計。旨在培養(yǎng)學生根據所學數(shù)控專業(yè)知識，直接參照范例進行套寫、擬寫和翻譯產品廣告、機床說明書、數(shù)控系統(tǒng)操作與編程說明書等應用文?！　〉谒牟糠譃椤敖浑H會話”（CommunicativeSpeaking），旨在培養(yǎng)學生的專業(yè)英語的口頭交際能力。

內容概要

　　《數(shù)控技術英語》是該系列教材之一，旨在提高數(shù)控類專業(yè)學生和數(shù)控行業(yè)從業(yè)人員學習專業(yè)英語及涉外業(yè)務人員的交際能力。專門用途英語系列教材是教育部規(guī)劃的高等學校（包括高等專科院校和高等職業(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)人員學習專業(yè)英語、提高涉外業(yè)務交際能力使用?！　　稊?shù)控技術英語》是根據《高職高專教育英語課程教學基本要求（試行）》組織編寫的。依照高職高專的培養(yǎng)目標及其教學的實際情況，《數(shù)控技術英語》更注重“邊學邊用，學用結合”的原則。內容系統(tǒng)、全面，難點、重點突出，并力求實用、先進、通俗、易懂。　　全書包括10個單元，每個單元都加入了-些與工廠緊密結合的實用英語例題，同時還設有數(shù)控實用英語對話等，書后附有練習參考答案和課文參考譯文?！　　稊?shù)控技術英語》既可作為高職、高專、成人高校及本科院校的數(shù)控技術及應用、機電一體化等專業(yè)的專業(yè)英語教材，也可用作企業(yè)培訓的教材，或相關專業(yè)教師、學生及技術人員的學習參考書。

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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