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1、外文翻译A,counttocontrolasystemdevelopmenttrendDevelopafirstontrialsexnumbertocontrolsystemfrom1952AmericanM.T.T.,havealreadywalkedthrough46calendardistancestillnow.Thenumbetcontrolssystemfromatthebeginningoftheelectrontubetypestart,experiencefollowingseveraldeveolpstep:Centthenumberofthe—small
2、scaledsuper—tinymachinetypeofthelargescaleintegration—ofthecalculatortypeofthe—largescaleintegrationofthesmal1scaleintegratedcircuitofthesigntypetransistortypetype—type—controlssystem.Tothe80"s,populationdevelopmenttrendBE:ThenumbercontrolsapparatustodeveolptowardtheCNCfromtheNC;Extensively
3、adopt32potentialCPUthecompositionhaveanothermicroprocessorsystem;Raisetheintegrationdegreeofsystem,reducevolume,adoptmoldmasstoturnstructure,easytocut,expandtogetstripewithfunction,satisfythedemandthatthedifferenttypenumbercontrolsenginebed;Driveapparatustocommunicate,numeralturnadirectiond
4、evelopment;TheCNCapparatusturnsadirectiondcvclopmenttowardtheeirtificieilintclligcnce;Thcautoofadoptionnewmodelweavesdistaneesystem;Tntensifycorrespondencefunction;Thenumbercontrolssystemreliabilitytocontinuouslyraise.Infine,thenumbercontrolsanenginebedtechniquetocontinuouslydeveolp,thefunc
5、tionismoreandmoreperfectandusemoreandmoreconvenient,thereliabilityismoreandmorehigh,thefunctionpricecomparealsomoreandmorehigh.To1990,thewholeworldnumbercontrolssystemprofessiontoproduceaplanthousetoproduceforyearnumbercontrolsystemabout130,000sets.Abroadnumbercontrolsystemtechniquethepopul
6、ationofthedevelopmentdeveolptrendBE:1.ThenewgencrationnumbercontrolsthesystemstructureofthesystemadoptionopentypeGetinto90’sandtechnicallyflytosoondcveolpbecauseofthecalculatorandpushnumbercontrolthefasterrenewaloftheenginebedtechniquetochangegeneralion.Manynumberscontrolthenewgenerationnum
7、berofsoftsystemstructureofthedevelopmentopentypeofthehardwareresourceswhichmakesuseofPCmachineabunclanceofthesystemproductionplanthousetocontrolsystemintheworld.Thestructureofopentypesystemmakesthenumbercontrolsystemtohavebetterandingeneraluse,gentle,ada
