外文翻译--模具高速铣削加工技术.doc

附录附录1英文原文MoldhighspeedmillingprocessingtechnologyFirst,forewordInthemodernmoldproduction,alongwithtomodelsartisticandthefunctionmustobtainmoreandmorehigh,modelstheinternalstructuretodesignmoreandmorecomplex,themoldcontourdesigndaybydayisalsocomplex,thefreecurvedsurfaceaccountsfortheproportiontoincreaseunceasingly,thecorrespondingmoldstructurealsodesignsmoreandmorecomplex.Theseallsetahigherrequesttothemoldprocessingtechnology,notonlyshouldguaranteethehighmanufactureprecisionandthesurfacequality,moreovermustpursuetheprocessingsurfaceartistic.Alongwithisunceasinglythoroughtothehighspeedprocessingengineeringresearch,isprocessingtheenginebed,thenumericalcontrolsystem,thecuttingtoolsystem,CAD/especiallyCorrelationtechnologyandsoonCAMsoftwaredevelopsunceasinglyundertheimpetus,highspeedprocessesthetechnologymoreandmoremanytoapplyinthemoldcavityprocessingandthemanufacture.Thenumericalcontrolhigh-speedcuttingprocessingtookinthemoldmanufactureamostimportantadvancedmanufacturetechnology,isthecollectionishighlyeffective,highquality,thelowconsumptioninabodyadvancedmanufacturetechnology.Isoppositeinthetraditionalmachining,itscuttingspeed,enteredtothespeedhadtheverybigenhancement,moreovercutthemechanismnottobesame.Thehigh-speedcuttingcausedthemachiningtohavetheleap,itsspecificpowermetalexcisionrateenhanced30%40%,thecuttingforcereduced30%,thecuttingtoolworkingdurabilityenhanced70%,remainedhotlylargescalereducesintheworkpiececutting,thelowstepshuddervanishednearly.Alongwiththecuttingspeedenhancement,unittimesemi-finishedmaterialsmaterialremovingrateincreased,thecuttingtimereduced,theprocessingefficiencyenhanced,thusreducedtheproductmanufacturecycle,enhancedtheproductmarketcompetitivepower.Atthesametime,thehighspeedprocessingsmallamountenteredquicklycausesthecuttingforcetoreduce,thescraphighspeeddischargedreducedtheworkpiececuttingforceandthethermalloaddistorts,enhancestherigiditytobebadandthethinwallcomponentsmachiningpossibility.Becausecuttingforcereducing,therotationalspeedenhancementcausesthecuttingsystemtheoperatingfrequencytobefarawaytheenginebedthelowstepnaturalfrequency,buttheworkpiecesurfaceroughnessismostsensitivetothelowstepfrequency,fromthisreducedthesurfaceroughness.Inmoldhighhardsteelstock(HRC45HRC65)intheprocessingprocess,usesthehigh-speedcuttingtobepossibletosubstitutefortheworkingprocedurewhichtheelectricalfinishingandrubstruncatespolishes,thushasavoidedtheelectrodemanufactureandthetime-consumingelectricalfinishing,largescalereducedfitterspolishingwithtothrowthelightquantity.Thinwallmoldworkpiecemoreandmoreneedswhichregardingsomemarketsin,thehighspeedmillingalsomaysmoothlycomplete,moreoverinthehighspeedmillingCNCprocessingcenter,amoldattireclampsmaycompletethemultiplexstepofprocessing.Thehighspeedprocessingtechnologyhashadthehugeinfluencetothemoldprocessingcraft,changedthetraditionalmoldprocessingtousetheannealing-millingprocessing-heattreatment-torubtruncatesortheelectricsparkmachining-manuallypolishes,polishesandsoonthecomplexlongtechnicalprocess,evenmightusethehigh-speedcuttingprocessingsubstitutionoriginalcompleteworkingprocedure.Thehighspeedprocessingtechnologybesidesmayapplyinthehardmoldcavitydirectprocessing(inparticularhalfprecisionworkandprecisionwork),inEDMaspectandsoonelectrodeprocessing,fasttypemanufacturealsoobtainedthewidespreadapplication.Themassproductionspracticeindicatedthat,theapplicationhigh-speedcuttingtechnologymaysaveinthemoldfollowingprocessing80%handworktogrindthetimeapproximately,savestheprocessingcostexpensenearly30%,themoldfaceworkprecisionmayreach1m,thecuttingtoolcuttingefficiencymayenhance1time.Second,highspeedmillingprocessingenginespindleThehigh-speedcuttingtechnologyisoneofmachiningtechnologymaindevelopmentdirections,italongwithfoundationtechnologytheandsoonCNCtechnology,microelectronictechnology,newmaterialandnewstructuredevelopmentbutstepsahigherstair.Becausethemoldprocessesparticularaswellashighspeedprocessingtechnologyowncharacteristic,(processedenginebed,numericalcontrolsystem,cuttingtooltothemoldhighspeedprocessingrelatedtechnologyandthecraftsystemandsoon)proposedprocessedahigherrequestcomparedtothetraditionalmold.1.HighstableenginespindlesstrutpartThehigh-speedcuttingenginelatheandsoonsupportstheparttobesupposedtohaveverywellmoves,thestaticrigidity,hotrigidityandbestdampingcharacteristic.Themajorityofenginebedsallusehighgrade,thehighrigidityandGaoKangzhangthegrayirontookthestrutpartmaterial,someenginebedcompaniesalsoincreasethehighdampingcharacteristicinthefoundationpolymerconcrete,byincreasesitsvibration-proofandthethermo-stability,thisnotonlymayguaranteetheenginebedprecisionisstable,alsomaypreventwhencuttingthecuttingtoolinspirestrembles.Usestheenclosedlathebeddesign,theoverallcastinglathebed,thesymmetricallathebedstructureandhasthedenselycoveredstiffenerandsoonalsoenhancestheenginebedstableimportantmeasure.Someenginebedcompaniesresearchanddevelopmentdepartmentsindesignprocess,butalsousesthemodalityanalysisandthefiniteelementstructurecomputationandsoon,optimizedthestructure,stablycausestheenginebedstrutparttobereliable.2.EnginespindlesmainaxleThehighspeedenginebedmainaxleperformanceistherealizationhigh-speedcuttingprocessingimportantcondition.Thehigh-speedcuttingenginebedmainaxlerotationalspeedscopeis10000100000m/Min,themainaxlepowerisbiggerthan15kW.Isnotbiggerthan0.005mmthroughthemainaxlecompressedairoraxialplaybetweenthecoolingsystemcontrolhiltandthemainaxle.Alsorequeststhemainaxletohavethefastverticalspeed,toassigntheperformancewhichthepositionisfaststops(namelytohaveextremelyhighangleadditionandsubtractionspeed),thereforethehighspeedmainaxleoftenusestheliquidstaticpressurebearingtype,theairstaticpressurebearingtype,thethermo-compressionnitridingsilicon(Si3N4)theceramicbearingmagnetismaerosolbearingtypeiso-structuralismform.Lubricatesusestechnologyandsoonoilgaslubrication,splashlubrication.Themainaxlecoolsusesthemainaxleinteriorwatercoolinggenerallyoraircooled.3.TheactuatessystemoftheenginespindleInordertosatisfythemoldhighspeedprocessingtheneed,highspeedprocessestheenginebedtheactuationsystemtobesupposedtohavethefollowingcharacteristic:(1)highenteringforspeed.Theresearchindicatedthat,regardingtheminordiametercuttingtool,enhancestherotationalspeedandeachtoothentersforthequantityisadvantageousinreducesthecuttingtoolattrition.Atpresentcommonlyusedenteringforthespeedrangeis2030m/Min,likeusesleadsgreatlytheballbearingguidescrewtransmission,entersmayreach60m/min；Usesthestraightlineelectricalmachinerythenmayenabletoachieve120m/min.(2)highacceleration.Hasthegoodaccelerationcharacteristictothethreedimensionalcomplexcurvedsurfacesilhouettehighspeedprocessingrequestactuationsystem,therequestprovidesthedriverwhichthehighrapidadvanceorprogressgives(toenterspeedapproximately40m/min,the3Doutlineprocessingspeedis10m/Min),canprovide0.4m/S2to10m/Thes2accelerationandreducesthespeed.Theenginebedmanufacturermostlyusestheentireclosedlooppositionservo-controlslightlytolead,thegreatsize,thehighgradeballbearingguidescreworleadsgreatlymanyguidescrews.Alongwiththeelectricalmachinerytechnologydevelopment,theadvancedstraightlineelectricmotoralreadywaspublished,andthesuccessappliedintheCNCenginebed.TheadvancedstraightlinedirectmotordriveenabletheCNCenginebednolongertohavethemassinertia,inadvance,questionandsoonlagandvibration,speduptheservospeedofresponse,increasedtheservo-controlprecisionandtheenginebedprocessingprecision.4.NumericalcontrolsystemTheadvancednumericalcontrolsystemisguaranteedthemoldcomplexcurvedsurfacehighspee