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1NumericalcontroltechnologydevelopmentNumericalcontrolsystemdevelopbirefhistoryandtrendthefirstelectroniccomputerintheworldbornedin1946,thisindicatesthemankindhascreatedthetoolthatcanstrengthenandreplacethementallabourpartly.It,andmankindthosethatcreatetostrengthentoolofmanuallaborcompareamongagriculture,industrialsociety,thequalitativeleaphasarisen,hasestablishedthefoundationthatthemankindenterstheinformationintensivesociety.6yearslater,namelyin1952,thetechnologyofthecomputerwasappliedtothelathe,thefirstnumericalcontrollathehasemergedinU.S.A..Fromthenon,thetraditionallathehadproducedthechangeofthequality.Innearlyhalfacentury,numericalcontrolsystemgothroughtwostageandsixdevelopmentofgeneration.ThestageofnumericalcontrolNC19521970yearsTheoperationoftheearlycomputerislowinspeed,influencenotalsobigscientificcaculationanddataprocessingatthattime,butcantmeettheneedsofrealtimecontrolofthelathe.Peoplehavetoadoptthedigitallogicalcircuittoputupandbecomethespecialpurposecomputerofalatheasthenumericalcontrolsystem,knownasthehardwareandconnectnumericalcontrolHARDWIREDNC,abbreviateasthenumericalcontrolNC.Withthedevelopmentofcomponentsandparts,doesthisstagegothroughy′ú£ofthesixthofthetwelveEarthlyBranchesFirstgenerationin952ElectrontubeSecondgenerationin1959TransistorThethirdgenerationin1965Smallscaleintegratedcircuit.ThestageofnumericalcontrolofthecomputerCNC1970nowBy1970,thesmallscalecomputerindustryincommonusehasalreadyappearedandproducedbybatch.Thentransplantitoverasthekeypartofsystemofnumericalcontrol,entercomputernumericalcontrolstagefromnowonwhetherdueincommonusetwowordsomitcomputer.By1971,intheworldforthefirsttimetwocentralpartmostofcomputerCompany,INTELofU.S.A.,arithmeticunitandcontroller,adoptthetechnologyintergrationofthelargescaleintegratedcircuitonachip,callit2microprocessorMICROPROCESSOR,cancallcentralauthoritiespunishEntranceabbreviateasCPU.Themicroprocessorisappliedthenumericalcontrolsystemby1974.Thisbecausebeingfunctiontoostrong,minicomcontrolonelatheabilityhaverichuseforcontrollingmanylathesatthattime,callitteamcontrol,havemorerationaleconomythantheadoptionmicroprocessor.Andtheminicomputerdependabilityatthattimewasunsatisfactory.Earlymicroprocessorspeedandfunctionalthoughenoughhigh,cansolvethroughmanyprocessorstructure.Becausethemicroprocessorisakeypartoftheallpurposecomputer,sostillcalledthenumericalcontrolofthecomputer.By1990,theperformanceofthePCpersonalcomputer,isusedtocallingthecomputerathomehasalreadydevelopedintoveryhighstage,canmeetthedemandwhichisregardedasthekeypartofthenumericalcontrolsystem.ThenumericalcontrolsystementeredthestagebasedonPCfromthenon.Inaword,thecomputerwentthroughthreegenerationstooatnumericalcontrolstage.Namelythefourthgenerationin1970MinicomThefifthgenerationin1974Themicroprocessorandthesixthgenerationof1990BecauseofPCcallPCBASEDabroad.Theonesthatwerealsowantedandispointedoutare,thoughhasalreadyrenamedasthenumericalcontrolofthecomputernamelyCNCabroad,andourcountryisstillusedtobeingcalledthenumericalcontrolNC.Soourdailynumericalcontrolthatspeak,hasalreadyreferredtothenumericalcontrolofthecomputerinfact.Futuredevelopmenttrendofnumericalcontrol1.3.1continuetoopen,basedonPCsixgenerationcubicmetertodevelopCharacteristicofenrichingonthebasisofopening,lowcost,highdependability,softwareandhardwareresourcethatPChasetc.,moresystematicmanufacturersofnumericalcontrolwillgoonthisroad.AdoptPCasfrontmachineofit,isitdealwithmanmachineinterface,programming,networkcommunication,etc.problemtocomeatleast,undertakenthetaskofnumericalcontrolbythealreadyexistingsystem.The3friendlymanmachineinterfacethatthePChas,willrunthroughallnumericalcontrolsystems.Telecommunication,willdiagnoselongranglyandmaintainmoregeneral.DeveloptohighspeedandhighaccuracyThisismeetingtheneedthatthelatheisdevelopedinthehighspeedandhighaccuracydirection.DeveloptowardintellectualityWiththeconstantinfiltrationanddevelopmentinthefieldofcomputerofartificialintelligence,theintelligentdegreeofthenumericalcontrolsystemwillbeimprovedconstantly.1UsetheadaptivecontroltechnologyNumericalcontrolsystemcanofthedetectionproceduresomeimportantinformation,andadjusttherelevantparametersofthesystemautomatically,achievethegoalofimprovingsystematicoperationstate.2IntroducedtotheexpertsystemandguidedandprocessedExperiencedoperatorandexperienceofexpert,universallawandspeciallawofprocessingdepositsystem,regardparameterdatabaseofthecraftassupport,setuptheexpertsystemwithartificialintelligence.3Introducethetroubleanddiagnosetheexpertsystem4IntelligentdigitalservodriveCanthroughdiscernloadautomatically,adjustparameterautomatically,isiturgesystemwinthebestoperationtomake.Second,necessity2oflathenumericalcontroltransformation.1,WatchthenecessitytransformedalittleLookingfrommicrocosmic,thenumericalcontrollathehasthefollowingandoutstandingsuperioritymorethanthetraditionallathe,andsuperioritythecomefromnumericalcontrolmightofcomputersysteminclude.2.1.1canprocesssuchcomplicatedpartsasthecurvecomingoutintraditionalmachinetooling,curvedsurface,etc.Becausecomputerhavesuperboperationability,caninstantaneoustocalculateouteachcoordinateaxisinstantaneousamountofexercisethatshouldmoveaccurate,socancompoundintothecomplicatedcurveorcurvedsurface.2.1.2canrealizeautomationthatprocess,andflexibleautomation,thusefficiencyraisethanthetraditionallatheby37times.Becausethecomputerhasmemoryandstoresability,canrememberandstoretheprocedureinput,thencarryoutautomaticallyaccordingtothe4orderthattheprocedurestipulates,thusrealizeautomation.Solongasnumericalcontrollathechangesaprocedure,canrealizetheautomationthatanotherworkpieceisprocessed,thusmakesinglepieceandproduceautomationofmustusinginsmallbatches,soknownasrealizingflexibleautomation.2.1.3Theprecisionof3processingpartsishigh,thesizeisdisperseddegreesmall,itiseasytoenableassembling,nolongerneedtorepairthedamagedpartsofamachineandsupplyreplacements.2.1.4concentrationthatcanrealizemanyprocesses,reducethefrequentlycarryingamongthelathesofpart.2.1.5hassuchmanykindsofselfcontainmentfunctionsasautoalarm,controlling,automaticcompensationautomatically,etc.,thereforecanrealizenobodyguardsandprocessesforalongtime2.1.6isbytheabovefivespinoffadvantages.ForinstanceHavereduceworkerslabourintensity,hassavedtheworkforceapersoncanguardmanylathes,reducefrocks,shortentrialproductionofnewproductscycleandproductioncycle,canmakefastreaction,etc.tomarketdemand.Theabovesuperioritycouldnotbeimaginedbyforefathers,wasanextremelygreatbreakthrough.Inaddition,thenumericalcontrolofthelathepursuesFMCFoundationinsuchenterprisesinformationbasedtransformationsasflexiblemanufacturingunit,FMSflexiblemanufacturingsystemandCIMSCIMS,etc..Numericalcontroltechnologyhasalreadybecomekeytechnologyofautomationofmanufacturingindustryandbasictechnology.2.2,SeethenecessitytransformedinmacroscopicLookfrommacroscopic,thearmyoftheindustriallydevelopedcountry,thepeoplesmechanicalindustry,bytheendofthe70s,alreadybegintousethenumericalcontrollatheonalargescaleatthebeginningoftheeighties.Itsessenceis,adopttheinformationtechnologytocarryontechnologicaltransformationtothetraditionalindustryincludingthearmy,thepeoplesmechanical
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