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外文翻译---模具高速铣削加工技术.doc

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外文翻译---模具高速铣削加工技术.doc

MoldhighspeedmillingprocessingtechnologyTheabstractIntroducedthehighspeedmillinginthemoldprocessingapplicationaswellastheinfluence,andbriefintroductionhighspeedmillingenginebedstructure,controlsystemandcuttingtool.Hascarriedonthesimpleanalysistothehighspeedprocessingcraft.KeywordhighspeedmillingmoldprocessingFirst,forewordInthemodernmoldproduction,alongwithtomodelsartisticandthefunctionmustobtainmoreandmorehigh,modelstheinternalstructuretodesignmoreandmorecomplex,themoldcontourdesigndaybydayisalsocomplex,thefreecurvedsurfaceaccountsfortheproportiontoincreaseunceasingly,thecorrespondingmoldstructurealsodesignsmoreandmorecomplex.Theseallsetahigherrequesttothemoldprocessingtechnology,notonlyshouldguaranteethehighmanufactureprecisionandthesurfacequality,moreovermustpursuetheprocessingsurfaceartistic.Alongwithisunceasinglythoroughtothehighspeedprocessingengineeringresearch,isprocessingtheenginebed,thenumericalcontrolsystem,thecuttingtoolsystem,CAD/especiallyCorrelationtechnologyandsoonCAMsoftwaredevelopsunceasinglyundertheimpetus,highspeedprocessesthetechnologymoreandmoremanytoapplyinthemoldcavityprocessingandthemanufacture.Thenumericalcontrolhighspeedcuttingprocessingtookinthemoldmanufactureamostimportantadvancedmanufacturetechnology,isthecollectionishighlyeffective,highquality,thelowconsumptioninabodyadvancedmanufacturetechnology.Isoppositeinthetraditionalmachining,itscuttingspeed,enteredtothespeedhadtheverybigenhancement,moreovercutthemechanismnottobesame.Thehighspeedcuttingcausedthemachiningtohavetheleap,itsspecificpowermetalexcisionrateenhanced3040,thecuttingforcereduced30,thecuttingtoolworkingdurabilityenhanced70,remainedhotlylargescalereducesintheworkpiececutting,thelowstepshuddervanishednearly.Alongwiththecuttingspeedenhancement,unittimesemifinishedmaterialsmaterialremovingrateincreased,thecuttingtimereduced,theprocessingefficiencyenhanced,thusreducedtheproductmanufacturecycle,enhancedtheproductmarketcompetitivepower.Atthesametime,thehighspeedprocessingsmallamountenteredquicklycausesthecuttingforcetoreduce,thescraphighspeeddischargedreducedtheworkpiececuttingforceandthethermalloaddistorts,enhancestherigiditytobebadandthethinwallcomponentsmachiningpossibility.Becausecuttingforcereducing,therotationalspeedenhancementcausesthecuttingsystemtheoperatingfrequencytobefarawaytheenginebedthelowstepnaturalfrequency,buttheworkpiecesurfaceroughnessismostsensitivetothelowstepfrequency,fromthisreducedthesurfaceroughness.InmoldhighhardsteelstockHRC45HRC65intheprocessingprocess,usesthehighspeedcuttingtobepossibletosubstitutefortheworkingprocedurewhichtheelectricalfinishingandrubstruncatespolishes,thushasavoidedtheelectrodemanufactureandthetimeconsumingelectricalfinishing,largescalereducedfitterspolishingwithtothrowthelightquantity.Thinwallmoldworkpiecemoreandmoreneedswhichregardingsomemarketsin,thehighspeedmillingalsomaysmoothlycomplete,moreoverinthehighspeedmillingCNCprocessingcenter,amoldattireclampsmaycompletethemultiplexstepofprocessing.Thehighspeedprocessingtechnologyhashadthehugeinfluencetothemoldprocessingcraft,changedthetraditionalmoldprocessingtousetheannealing→millingprocessing→heattreatment→torubtruncatesortheelectricsparkmachining→manuallypolishes,polishesandsoonthecomplexlongtechnicalprocess,evenmightusethehighspeedcuttingprocessingsubstitutionoriginalcompleteworkingprocedure.Thehighspeedprocessingtechnologybesidesmayapplyinthehardmoldcavitydirectprocessinginparticularhalfprecisionworkandprecisionwork,inEDMaspectandsoonelectrodeprocessing,fasttypemanufacturealsoobtainedthewidespreadapplication.Themassproductionspracticeindicatedthat,theapplicationhighspeedcuttingtechnologymaysaveinthemoldfollowingprocessing80handworktogrindthetimeapproximately,savestheprocessingcostexpensenearly30,themoldfaceworkprecisionmayreach1m,thecuttingtoolcuttingefficiencymayenhanceonetime.Second,highspeedmillingprocessingenginebedThehighspeedcuttingtechnologyisoneofmachiningtechnologymaindevelopmentdirections,italongwithfoundationtechnologytheandsoonCNCtechnology,microelectronictechnology,newmaterialandnewstructuredevelopmentbutstepsahigherstair.Becausethemoldprocessesparticularaswellashighspeedprocessingtechnologyowncharacteristic,processedenginebed,numericalcontrolsystem,cuttingtooltothemoldhighspeedprocessingrelatedtechnologyandthecraftsystemandsoonproposedprocessedahigherrequestcomparedtothetraditionalmold.1.HighstableenginebedstrutpartThehighspeedcuttingenginebedlathebedandsoonsupportstheparttobesupposedtohaveverywellmoves,thestaticrigidity,hotrigidityandbestdampingcharacteristic.Themajorityofenginebedsallusehighgrade,thehighrigidityandGaoKangzhangthegrayirontookthestrutpartmaterial,someenginebedcompaniesalsoincreasethehighdampingcharacteristicinthefoundationpolymerconcrete,byincreasesitsvibrationproofandthethermostability,thisnotonlymayguaranteetheenginebedprecisionisstable,alsomaypreventwhencuttingthecuttingtoolinspirestrembles.Usestheenclosedlathebeddesign,theoverallcastinglathebed,thesymmetricallathebedstructureandhasthedenselycoveredstiffenerandsoonalsoenhancestheenginebedstableimportantmeasure.Someenginebedcompaniesresearchanddevelopmentdepartmentsindesignprocess,butalsousesthemodalityanalysisandthefiniteelementstructurecomputationandsoon,optimizedthestructure,stablycausestheenginebedstrutparttobereliable.2.EnginebedmainaxleThehighspeedenginebedmainaxleperformanceistherealizationhighspeedcuttingprocessingimportantcondition.Thehighspeedcuttingenginebedmainaxlerotationalspeedscopeis10000100000m/Min,themainaxlepowerisbiggerthan15kW.Isnotbiggerthan0.005mmthroughthemainaxlecompressedairoforaxialplaybetweenthecoolingsystemcontrolhiltandthemainaxle.Alsorequeststhemainaxletohavethefastverticalspeed,toassigntheperformancewhichthepositionisfaststopsnamelytohaveextremelyhighangleadditionandsubtractionspeed,thereforethehighspeedmainaxleoftenusestheliquidstaticpressurebearingtype,theairstaticpressurebearingtype,thethermocompressionnitridingsiliconSi3N4theceramicbearingmagnetismaerosolbearingtypeisostructuralismform.Lubricatesusestechnologyandsoonoilgaslubrication,splashlubrication.Themainaxlecoolsusesthemainaxleinteriorwatercoolinggenerallyoraircooled.3.TheenginebedactuatesthesystemInordertosatisfythemoldhighspeedprocessingtheneed,highspeedprocessestheenginebedtheactuationsystemtobesupposedtohavethefollowingcharacteristic1highenteringforspeed.Theresearchindicatedthat,regardingtheminordiametercuttingtool,enhancestherotationalspeedandeachtoothentersforthequantityisadvantageousinreducesthecuttingtoolattrition.Atpresentcommonlyusedenteringforthespeedrangeis2030m/Min,likeusesleadsgreatlytheballbearingguidescrewtransmission,entersmayreach60m/forthespeedMinUsesthestraightlineelectricalmachinerythenmayenabletoachieve120m/tothespeedMin.2highacceleration.Hasthegoodaccelerationcharacteristictothethreedimensionalcomplexcurvedsurfacesilhouettehighspeedprocessingrequestactuationsystem,therequestprovidesthedriverwhichthehighrapidadvanceorprogressgivestoenterspeedapproximately40m/quicklyMin,the3Doutlineprocessingspeedis10m/Min,canprovide0.4m/S2to10m/Thes2accelerationandreducesthespeed.Theenginebedmanufacturermostlyusestheentireclosedlooppositionservocontrolslightlytolead,thegreatsize,thehighgradeballbearingguidescreworleadsgreatlymanyguidescrews.Alongwiththeelectricalmachinerytechnologydevelopment,theadvancedstraightlineelectricmotoralreadywaspublished,andthesuccessappliedintheCNCenginebed.TheadvancedstraightlinedirectmotordriveenabletheCNCenginebednolongertohavethemassinertia,inadvance,questionandsoonlagandvibration,speduptheservospeedofresponse,increasedtheservocontrolprecisionandtheenginebedprocessingprecision.4.NumericalcontrolsystemTheadvancednumericalcontrolsystemisguaranteedthemoldcomplexcurvedsurfacehighspeedprocessingqualityandtheefficiencykeyaspect,themoldhighspeedcuttingprocessingtothenumericalcontrolsystembasicrequestisA.HighspeednumericalcontrolreturnrouteDigitalcontrolloop,including32orabove64bitparallelprocessorsand1.5GbharddiskExtremelyshortstraightlineelectricalmachinerysamplingtime.B.SpeedandaccelerationfeedforwardcontrolFeedforwardcontrolDigitalactuationsystemcrawlingcontrolJerkcontrol.C.AdvancedinsertsmakesupthemethodtoinsertbasedontheNURBStransectmakesup,byobtainsthegoodsurfacequality,theprecisesizeandthehighgeometryprecision.

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