專業(yè)英語.doc

1一、專業(yè)術(shù)語英漢互譯（每小題1分，共36分）1.multi-pointtool2.nationalstandard3.toolwear4.leadscrew5.enginelathe6.MEMS7.ernalturning21.rack-and-pinion22.machinetool23.spurgear24.manipulatedvariable25.特種加工工藝26.殘余應(yīng)力27.電火花加工28.過盈配合29.基孔制30.自由度31.齒輪傳動32.一級減速33.閉環(huán)控制34.伺服機構(gòu)35.分辨率36.數(shù)字信號二、單句英漢互譯（每小題4分，共40分）1.Medium-carbonsteelisgenerallyusedinapplicationsrequiringhigherstrengththanisavailableinlow-carbonsteels,suchasinmachinery,inautomotiveandagriculturalequipmentparts(gears,axles,connectingrods,crankshafts),inrailroadequipment,andinpartsformetalworkingmachinery.2.Inturning,aworkpieceisrotatedaboutitsaxisassingle-pointcuttingtoolsarefedintoit,shearingawayexcessmaterialandcreatingthedesiredcylindricalsurface.3.Inchemicalmachining,materialisremovedfromselectedareasofworkpiecebyimmersingitinachemicalreagentsoretchants,suchasacidsandalkaline2solutions.4.Howmatingpartsorassembliesfittogetherwithcomponentpartsisreferredtoasfit,whichincludesclearancefit,interferencefit,ortransitionfit,seeFig.7.3.5.Jigsarerarelyclampedonthemachinetablebecauseitisnecessarytomovethejigonthetabletoalignthevariousbushinginthejigwiththemachinespindle.6.Thesimplestarrangementofspurgearsisasinglepairofgearscalledasinglereductionstage,whereoutputrotationisinadirectionoppositethatoftheinput.7.Intheopen-loopcontrolsystem,notonlyarethevaluesoftheparametersofaprocessoftennotpreciselyknown,buttheymayalsochangegreatlywithoperatingconditions.8.Atransducerisadevicewhichconvertsthequantitybeingmeasuredintoanoptical,mechanical,ormorecommonly-electricalsignal.9.不必要的緊公差會導(dǎo)致由于昂貴的制造方法和較高的廢品率所帶來的高的制造成本。10.齒輪傳動系統(tǒng)主要用于工業(yè)設(shè)備如機床、汽車、工程機械、農(nóng)業(yè)機械以及建筑機械。三、根據(jù)英文意思選擇合適的單詞或詞組（每小題2分，共10分）1.Apressisusedtoboreholesintoaworkpiece.2.Aisarandompointcuttingtoolwhichusesabrasivesintheshapeofawheel,bondedtoabelt,astickorsimplysuspendedinliquid.3.Aholdstheworkpieceandrotatesit,andthesharpenededgeofatoolcutsandremovesmaterial.4.isarelativelysimplecuttingoperationwhichflatssurface.5.Aisversatilemachinetoolwhichisusefulformachiningtherough3surfaceofaworkpieceflatandsmoothandforshapingthemwithslots.AplanningBmillingmachineClatheDgrindingmachineEleadscrewFbandsawGdrill四、文獻段落翻譯（14分）Processplanningrepresentsthelinkbetweenengineeringdesignandshop-floormanufacturing.Itisconcernedwithselectingmethodsofproduction:tooling,fixtures,machinery,sequenceofoperations,andassembly.Allofthesediverseactivitiesmustbeplanned,whichtraditionallyhasbeendonebyprocessplanners.Thesequenceofprocessesandoperationstobeperformed,themachinestobeused,thestandardtimeforeachoperation,andsimilarinformationallaredocumentedonaroutingsheet.Whendonemanually,thistaskishighlylabor-intensiveandtime-consumingandreliesheavilyontheexperienceoftheprocessplanner.Modernpracticeinroutingsheetsistostoretherelevantdataincomputersandaffixabarcode(orotheridentification)tothepart.InordertoshortenthegapbetweenCADandCAM,manycomputerizedprocessplanningapproacheshavebeendevelopedtoaccomplishthetaskofprocessplanninginthepastdecades.Theseapproachesareknownascomputer-aidedprocessplanning(CAPP).WiththehelpofCAPP,bette