外文翻译.docx

外文翻译.docx

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外文翻译

Moldhighspeedmillingprocessingtechnology

TheabstractIntroducedthehighspeedmillinginthemoldprocessingapplicationaswellastheinfluence,andbriefintroductionhighspeedmillingenginebedstructure,controlsystemandcuttingtool.Hascarriedonthesimpleanalysistothehighspeedprocessingcraft.

Keywordhighspeedmilling;moldprocessing

First,foreword

Inthemodernmoldproduction,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,unittimesemifinishedmaterialsmaterialremovingrateincreased,thecuttingtimereduced,theprocessingefficiencyenhanced,thusreducedtheproductmanufacturecycle,enhancedtheproductmarketcompetitivepower.Atthesametime,thehighspeedprocessingsmallamountenteredquicklycausesthecuttingforcetoreduce,thescraphighspeeddischargedreducedtheworkpiececuttingforceandthethermalloaddistorts,enhancestherigiditytobebadandthethinwallcomponentsmachiningpossibility.Becausecuttingforcereducing,therotationalspeedenhancementcausesthecuttingsystemtheoperatingfrequencytobefarawaytheenginebedthelowstepnaturalfrequency,buttheworkpiecesurfaceroughnessismostsensitivetothelowstepfrequency,fromthisreducedthesurfaceroughness.Inmoldhighhardsteelstock（HRC45~HRC65）intheprocessingprocess,usesthehigh-speedcuttingtobepossibletosubstitutefortheworkingprocedurewhichtheelectricalfinishingandrubstruncatespolishes,thushasavoidedtheelectrodemanufactureandthetime-consumingelectricalfinishing,largescalereducedfitter'spolishingwithtothrowthelightquantity.Thinwallmoldworkpiecemoreandmoreneedswhichregardingsomemarketsin,thehighspeedmillingalsomaysmoothlycomplete,moreoverinthehighspeedmillingCNCprocessingcenter,amoldattireclampsmaycompletethemultiplexstepofprocessing.

Thehighspeedprocessingtechnologyhashadthehugeinfluencetothemoldprocessingcraft,changedthetraditionalmoldprocessingtouse"theannealing→millingprocessing→heattreatment→torubtruncates"or"theelectricsparkmachining→manuallypolishes,polishes"andsoonthecomplexlongtechnicalprocess,evenmightusethehigh-speedcuttingprocessingsubstitutionoriginalcompleteworkingprocedure.Thehighspeedprocessingtechnologybesidesmayapplyinthehardmoldcavitydirectprocessing（inparticularhalfprecisionworkandprecisionwork）,inEDMaspectandsoonelectrodeprocessing,fasttypemanufacturealsoobtainedthewidespreadapplication.Themassproductionspracticeindicatedthat,theapplicationhigh-speedcuttingtechnologymaysaveinthemoldfollowingprocessing80%handworktogrindthetimeapproximately,savestheprocessingcostexpensenearly30%,themoldfaceworkprecisionmayreach1m,thecuttingtoolcuttingefficiencymayenhanceonetime.

Second,highspeedmillingprocessingenginebed

Thehigh-speedcuttingtechnologyisoneofmachiningtechnologymaindevelopmentdirections,italongwithfoundationtechnologytheandsoonCNCtechnology,microelectronictechnology,newmaterialandnewstructuredevelopmentbutstepsahigherstair.Becausethemoldprocessesparticularaswellashighspeedprocessingtechnologyowncharacteristic,（processedenginebed,numericalcontrolsystem,cuttingtooltothemoldhighspeedprocessingrelatedtechnologyandthecraftsystemandsoon）proposedprocessedahigherrequestcomparedtothetraditionalmold.

1.Highstableenginebedstrutpart

Thehigh-speedcuttingenginebedlathebedandsoonsupportstheparttobesupposedtohaveverywellmoves,thestaticrigidity,hotrigidityandbestdampingcharacteristic.Themajorityofenginebedsallusehighgrade,thehighrigidityandGaoKangzhangthegrayirontookthestrutpartmaterial,someenginebedcompaniesalsoincreasethehighdampingcharacteristicinthefoundationpolymerconcrete,byincreasesitsvibration-proofandthethermostability,thisnotonlymayguaranteetheenginebedprecisionisstable,alsomaypreventwhencuttingthecuttingtoolinspirestrembles.Usestheenclosedlathebeddesign,theoverallcastinglathebed,thesymmetricallathebedstructureandhasthedenselycoveredstiffenerandsoonalsoenhancestheenginebedstableimportantmeasure.Someenginebedcompanies'researchanddevelopmentdepartmentsindesignprocess,butalsousesthemodalityanalysisandthefiniteelementstructurecomputationandsoon,optimizedthestructure,stablycausestheenginebedstrutparttobereliable.

2.Enginebedmainaxle

Thehighspeedenginebedmainaxleperformanceistherealizationhigh-speedcuttingprocessingimportantcondition.Thehigh-speedcuttingenginebedmainaxlerotationalspeedscopeis10000~100000m/Min,themainaxlepowerisbiggerthan15kW.Isnotbiggerthan0.005mmthroughthemainaxlecompressedairoforaxialplaybetweenthecoolingsystemcontrolhiltandthemainaxle.Alsorequeststhemainaxletohavethefastverticalspeed,toassigntheperformancewhichthepositionisfaststops（namelytohaveextremelyhighangleadditionandsubtractionspeed）,thereforethehighspeedmainaxleoftenusestheliquidstaticpressurebearingtype,theairstaticpressurebearingtype,thethermo-compressionnitridingsilicon（Si3N4）theceramicbearingmagnetismaerosolbearingtypeisostructuralismform.Lubricatesusestechnologyandsoonoilgaslubrication,splashlubrication.Themainaxlecoolsusesthemainaxleinteriorwatercoolinggenerallyoraircooled.

3.Theenginebedactuatesthesystem

Inordertosatisfythemoldhighspeedprocessingtheneed,highspeedprocessestheenginebedtheactuationsystemtobesupposedtohavethefollowingcharacteristic:

（1）highenteringforspeed.

Theresearchindicatedthat,regardingtheminordiametercuttingtool,enhancestherotationalspeedandeachtoothentersforthequantityisadvantageousinreducesthecuttingtoolattrition.Atpresentcommonlyusedenteringforthespeedrangeis20~30m/Min,likeusesleadsgreatlytheballbearingguidescrewtransmission,entersmayreach60m/forthespeedMin;Usesthestraightlineelectricalmachinerythenmayenabletoachieve120m/tothespeedMin.

（2）highacceleration.

Hasthegoodaccelerationcharacteristictothethreedimensionalcomplexcurvedsurfacesilhouettehighspeedprocessingrequestactuationsystem,therequestprovidesthedriverwhichthehighrapidadvanceorprogressgives（toenterspeedapproximately40m/quicklyMin,the3Doutlineprocessingspeedis10m/Min）,canprovide0.4m/S2to10m/Thes2accelerationandreducesthespeed.

Theenginebedmanufacturermostlyusestheentireclosedlooppositionservo-controlslightlytolead,thegreatsize,thehighgradeballbearingguidescreworleadsgreatlymanyguidescrews.Alongwiththeelectricalmachinerytechnologydevelopment,theadvancedstraightlineelectricmotoralreadywaspublished,andthesuccessappliedintheCNCenginebed.TheadvancedstraightlinedirectmotordriveenabletheCNCenginebednolongertohavethemassinertia,inadvance,questionandsoonlagandvibration,speduptheservospeedofresponse,increasedtheservo-controlprecisionandtheenginebedprocessingprecision.

4.Numericalcontrolsystem

Theadvancednumericalcontrolsystemisguaranteedthemoldcomplexcurvedsurfacehighspeedprocessingqualityandtheefficiencykeyaspect,themoldhigh-speedcuttingprocessingtothenumericalcontrolsystembasicrequestis:

A.Highspeednumericalcontrolreturnroute（Digitalcontrolloop）,including:

32orabove64bitparallelprocessorsand1.5Gbharddisk;Extremelyshortstraightlineelectricalmachinerysamplingtime.

B.Speedandaccelerationfeed-forwardcontrol（Feedforwardcontrol）;Digitalactuationsystemcrawlingcontrol（Jerkcontrol）.

C.Advancedinsertsmakesupthemethod（toinsertbasedontheNURBStransectmakesup）,byobtainsthegoodsurfacequality,theprecisesizeandthehighgeometryprecision.

D.Pretreatment（Look-ahead）function.Therequesthasthelargecapacitycushionregister,mayreadinadvanceandinspectsmanysegments（forexa