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外文翻译--关于数控车床.doc

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外文翻译--关于数控车床.doc

英文原文OntheNClatheCNCmachinetoolnumericalcontrolmachinetoolsComputernumericalcontrolmachinetoolsabbreviation,isprovidedwithaprogramcontrolsystemofautomaticmachinetools.Thelogiccontrolsystemcandealwiththecontrolcodeorothersymbolicinstructionspecifiedprogram,anddecodingthedigitalcode,saidinformationcarrier,throughthenumericalcontroldeviceinput.AfterprocessingbyCNCdevicecontrolsignals,controlthemachinemovements,bydrawingtheshapeandsizerequirements,willbeautomaticallyprocessedbytheparts.FeaturesCNCmachinetooloperationandmonitoringofallcompletedinthenumericalcontrolunit,itisthebrainofCNCmachinetools.Comparedwiththegeneralmachinetools,CNCmachinetoolshasthefollowingcharacteristics●theprocessingobjectadaptability,adapttothecharacteristicsofmoldproductssuchasasingleproduction,providetheappropriateprocessingmethodfordieandmouldmanufacturing●highmachiningaccuracy,processingwithstablequality●cancoordinatelinkage,processingcomplexshapeparts●machiningpartschange,onlyneedtochangetheprogram,cansavethepreparationtimeofproduction●themachineitselfhighprecision,rigidity,canchoosetheamountofprocessinggood,highproductivity35timesascommonmachineThemachineisahighdegreeofautomation,reducinglaborintensity●conducivetotheproductionmanagementmodernization.TheuseofCNCmachinetoolsandthestandardcodeofdigitalinformationprocessing,informationtransmission,theuseofcomputercontrolmethod,haslaidthefoundationfortheintegrationofcomputeraideddesign,manufacturingandmanagement●ontheoperatorsofhigherquality,higherdemandsfortherepairofthetechnicalstaff●highreliability.CompositionCNCmachinetoolsingeneralbytheinputmedium,manmachineinteractiveequipment,CNCequipment,feedservodrivesystem,spindleservodrivesystem,theauxiliarycontroldevice,feedbackapparatusandadaptivecontroldeviceetc..4inNCmachining,NCmillingprocessingisthemostcomplex,needtosolvemostproblems.NCprogrammingofNClineinadditiontoCNCmilling,cutting,CNCEDM,CNClathe,CNCgrinding,eachwithitsowncharacteristics,servosystemistheroleofthemotionsignalisconvertedintothemachinemovingpartsfromthenumericalcontroldeviceofpulse.ConcretehasthefollowingpartsthestructureofCNCmachinetools.DriverheisdrivingpartsofCNCmachinetools,actuator,includingspindledriveunit,feedingunit,spindlemotorandfeedmotor.Hethroughtheelectricorelectrohydraulicservosystemtorealizethespindleandfeeddriveunderthecontrolofnumericalcontroldevice.Whenseveralfeedlinkage,cancompletethepositioning,processingline,planecurveandspacecurve.Themainperformance1themaindimensions.2thespindlesystem.3feedsystem.4toolsystem.5electrical.Includingthemainmotor,servomotorspecificationsandpoweretc..6coolingsystem.Includingthecoolingcapacity,coolingpumpoutput.7dimensions.Expressedaslengthwidthheight.DevelopmenttrendofCNClatheHighspeed,precision,complex,intelligentandgreenisthegeneraltrendinthedevelopmentofCNCmachinetooltechnology,inrecentyears,madegratifyingachievementsinpracticalityandindustrialization.Mainlyinthe1machinetoolcompositetechnologytofurtherexpandwiththeCNCmachinetooltechnology,compositeprocessingtechnologymatures,includingmillingcarcompound,carmillingcompound,carboringdrillgearcuttingcompound,compositegrinding,forming,compositeprocessing,precisionandefficiencyofmachiningisgreatlyimproved.Onemachineisaprocessingfactory,onecard,completeprocessingconceptisbeingacceptedbymorepeople,thedevelopmentofcompoundprocessingmachinetoolisthetrendofdiversified.Intelligenttechnology2CNCmachinetoolshaveanewbreakthrough,intheperformanceofNCsystemhasbeenreflectedmore.Suchasautomaticallyadjusttheinterferenceanticollisionfunction,afterthepowerofworkpieceautomaticallyexitsafetypoweroffprotectionfunction,machiningpartsdetectionandautomaticcompensationfunctionoflearning,highprecisionmachiningpartsintelligentparameterselectionfunction,processautomaticeliminationofmachinevibrationfunctionsintothepracticalstage,intelligentupgradethefunctionofmachineandquality.The3robotsenableflexiblecombinationofflexiblecombinationofhigherefficiencyofrobotandthehostarewidelyused,makeflexiblelinemoreflexible,extendingthefunction,flexiblelineshortenfurther,moreefficient.Robotandmachiningcenter,millingcompositemachine,grinder,gearprocessingmachinetool,toolgrindingmachine,electricmachine,sawingmachine,punchingmachine,lasercuttingmachine,watercuttingmachineetc.variousformsofflexibleunitandflexibleproductionlinehasalreadybeguntheapplication.4precisionmachiningtechnologyhasthemachiningprecisionofCNCmetalcuttingmachinetoolsfromtheyarnintheoriginal0.01mmuptomicronlevel0.001mm,somevarietieshasreachedabout0.05μM.MicrocuttingandgrindingmachiningofultraprecisionCNCmachinetools,precisioncanreachabout0.05μm,shapeprecisioncanreachabout0.01μM.Specialprocessingprecisionbyusingoptical,electrical,chemical,energycanreachnanometerlevel0.001μm.Byoptimizingthedesignofmachinetoolstructure,machinetoolpartsofultraprecisionmachiningandprecisionassembly,usinghighprecisionclosedloopcontrolandtemperature,vibrationandotherdynamicerrorcompensationtechnology,improvethegeometricaccuracyofmachinetoolprocessing,reducetheshapeoferror,surfaceroughness,andintothesubmicron,nanosuperfinishingtiThe5functionalcomponenttoimprovetheperformanceoffunctionalcomponentsareatahighspeed,highprecision,highpowerandintelligentdirection,andobtainthematureapplication.AfulldigitalACservomotoranddrivedevice,hightechnologycontentoftheelectricspindle,linearmotor,torquemotor,linearmotioncomponentswithhighperformance,applicationofhighprecisionspindleunitandotherfunctionparts,greatlyimprovingthetechnicallevelofCNCmachinetools.ThefeeddrivesystemofCNClatheEffectoffeeddrivesystem,ThefeeddrivesystemofCNCmachinetoolswillbereceivedpulsecommandissuedbythenumericalcontrolsystem,andtheamplificationandconversionmachinemovementscarrytheexpectedmovement.Two,thefeedingtransmissionsystemrequirementsInordertoguaranteethemachiningaccuracyofNCmachinetoolishigh,thefeeddrivesystemoftransmissionaccuracy,sensitivityhighfastresponse,stablework,highstiffnessandfrictionandinertiasmall,servicelife,andcanremovethetransmissiongap.Categorythree,feeddrivesystem1,steppingmotorservosystemGenerallyusedforNCmachinetools.2,DCservomotorservosystemPowerisstable,butbecauseofthebrush,thewearresultinginuseneedtochange.GenerallyusedformiddlegradeCNCmachinetools.3,ACservomotorservosystemTheapplicationisextremelywidespread,mainlyusedinhighendCNCmachinetools.4,thelinearmotorservosystemNointermediatetransmissionchain,highprecision,thefeedspeed,nolengthlimitbutthepoorheatdissipation,protectionrequirementsareparticularlyhigh,mainlyusedforhighspeedmachine.Drivingcomponentfour,feedsystem1,theballscrewnutpairNCmachining,therotarymotionintolinearmotion,sotheuseofscrewnuttransmissionmechanism.NCmachinetoolsarecommonlyusedontheballscrew,asshowninFigure125,itcanbeaslidingfrictionintorollingfriction,meetthebasicrequirementsofthefeedsystemtoreducefriction.Thetransmissionsideofhighefficiency,smallfriction,andcaneliminatethegap,noreverseairtravelbutthemanufacturingcostishigh,cannotlock,sizeisnottoobig,generallyusedforlinearfeedinsmallCNCmachinetool.2,rotarytableInordertoexpandthescopeoftheprocessofNCmachinetools,CNCmachinetoolsinadditiontomakelinearfeedalongtheX,Y,Zthreecoordinateaxes,oftenalsoneedacircumferentialfeedmovementaroundYorZaxis.CircularfeedmotionofCNCmachinetoolsingeneralbytherotarytabletorealize,formachiningcenter,rotarytablehasbecomeanindispensablepartof.RotarytableofcommonlyusedCNCmachinetoolsintheindexingtableandNCrotarytable.1indexingtableIndexingtablecanonlyfinishdividingmovement,notcircularfeed,itisinaccordancewiththeinstructionsintheNCsystem,whenindexingwillworktogetherwiththeworkpiecerotationangle.Whenindexingcanalsousemanualindexing.Provisionsofindexingtableisgenerallyonlyrotaryanglesuchas90,60and45degree.2NCrotarytableNCrotarytableappearancesimilartotheindexingtable,buttheinternalstructureandfunctionisnotthesame.ThemainfunctionoftheNCrotarytableisbasedonthenumericalcontroldevicesendscommandpulsesignal,completecircumferentialfeedmovement,variousarcprocessingandsurfaceprocessing,itcanalsobegraduationwork.3,guideRailisanimportantpartoffeeddrivesystem,isoneofthebasicelementsofthestructureofmachinetool,rigidity,precisionandaccuracyofNCmachinetoolwhichdeterminestoalargeextentretention.Atpresent,guidetheNCmachinetoolareslidingrail,rollingguidewayandhydrostaticguideway.1slidingguideSlidingguiderailhastheadvantagesofsimplestructure,easymanufacture,goodstiffness,vibrationresistanceandhighperformance,widelyusedinCNCmachinetools,theuseofmostmetalplasticform,knownastheplasticguiderail,asshowninfigure126.

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