中英文翻译--数控生产设备.doc

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1、漆鹑割被稆豹崤侣伎孚则沼淝余呐恒秽论辜卡蠢悯嗟涵九、外文翻译鳃持瞒畛沭带詹翰厂挛扑计愿侉黔绍斓拐贿堑铣怀蟮菇NUMERICALCONTROLOFPRODUCTIONEQUIPMENTS粽要袅列遑墁哨躞凵叔蠛蛮Numericalcontrol(NC)isaformofprogrammableautomationinwhichtheprocessingequipmentiscontrolledbymeansofnumbers,letters,andothersymbols.Thenumbers,letters,andsymbolsarec

2、odedinanappropriateformattodefineaprogramofinstructionsforaparticularworkpartorjob.Whenthejobchanges,theprogramofinstructionsischanged.ThecapabilitytochangetheprogramiswhatmakesNCsuitableforlow-andmedium-volumeproduction.Itismucheasiertowritenewprogramsthantomakemajoral

3、terationsoftheprocessingequipment.嗒辕饲砌急蒿龃碜敲蕖太推BASICCOMPONENTSOFNC示魁埴钺咬亮猓耗尘输泰沅Anumericalcontrolsystemconsistsofthefollowingthreebasiccomponents:究忘谭挫颛份尉痴吒牢汽酝·Programofinstructions鸳支铽施环倏上韧珲阌故酷·Machinecontrolunit幄仍受很日牙沂傺旅挨皤鼓·Processingequipment缙貌饪瀚蜷蹁题朊乡赕刻翟Thegeneralrelation

4、shipamongthethreecomponentsisillustratedinFig.2.1.Theprogramisfedintothecontrolunit,whichdirectstheprocessingequipmentaccordingly.策喹犴漉答囝嘛策丁毪甜蒲Theprogramofinstructionsisthedetailedstep-by-stepcommandsthatdirecttheprocessingequipment.Initsmostcommonform,thecommandsreferto

5、positionsofamachinetoolspindlewithrespecttotheworktableonwhichthepartisfixtured.Moreadvancedinstructionsincludeselectionofspindlespeeds,cuttingtool,andotherfunction.Themostcommonmediuminuseoverthelastseveraldecadeshasbeen1-in.-widepunchedtape.Becauseofthewidespreaduseof

6、thepunchedtape,NCissometimescalled“tapecontrol”.However,thisisamisnomerinmodernusageofnumericalcontrol.Comingintousemorerecentlyhavebeenmagnetictapecassettesandfloppydiskettes.熟躬涩箩咐腥耢嗤衷甩讫娈Themachinecontrolunit(MCU)consistsoftheelectronicsandcontrolhardwarethatreadandint

7、erprettheprogramofinstructionandconvertitintomechanicalactionsofthemachinetoolorotherprocessingequipment.潍钡楱篡港削伤彳嗫敝圯双TheprocessingequipmentisthethirdbasiccomponentofanNCsystem.Itisthecomponentthatperformsusefulwork.Inthemostcommonexampleofnumericalcontrol,onethatperform

8、smachiningoperations,theprocessingequipmentconsistsoftheworktableandspindleaswellasthemotorsandcontrolsneededt