外文翻译--高速切削加工的发展及需求.doc

翻译部分英文原文High-speedmachininganddemandforthedevelopmentofHigh-speedmachiningiscontemporaryadvancedmanufacturingtechnologyanimportantcomponentofthehigh-efficiency,High-precisionandhighsurfacequality,andotherfeatures.ThisarticlepresentsthetechnicaldefinitionofthecurrentstateofdevelopmentofChinasapplicationfieldsandthedemandsituation.High-speedmachiningisorientedtothe21stcenturyanewhigh-tech,high-efficiency,High-precisionandhighsurfacequalityasabasicfeature,intheautomobileindustry,aerospace,DieManufacturingandinstrumentationindustriesgainedincreasinglywidespreadapplication,andhasmadesignificanttechnicalandeconomicbenefits.contemporaryadvancedmanufacturingtechnologyanimportantcomponentpart.HSCistoachievehighefficiencyofthecoretechnologymanufacturers,intensiveprocessesandequipmentpackagedsothatithasahighproductionefficiency.Itcanbesaidthatthehigh-speedmachiningisanincreaseinthequantityofequipmentsignificantlyimproveprocessingefficiencyessentialtothetechnology.High-speedmachiningisthemajoradvantages:improveproductionefficiency,improveaccuracyandreducetheprocessingofcuttingresistance.Thehigh-speedmachiningofmeaning,atpresentthereisnouniformunderstanding,therearegenerallyseveralpointsasfollows:highcuttingspeed.usuallyfasterthanthatoftheirnormalcutting5-10times；machinetoolspindlespeedhigh,generallyspindlespeedin-20000r/minabove10,000forhigh-speedcutting；Feedathighvelocity,usually15-50m/minupto90m/min；Fordifferentcuttingmaterialsandthewiringusedthetoolmaterial,high-speedcuttingthemeaningisnotnecessarilythesame；Cuttingprocess,bladedthroughfrequency(ToothPassingFrequency)closertothe"machine-tool-Workpiece"systemthedominantnaturalfrequency(DominantNaturalFrequency),canbeconsideredtobehigh-speedcutting.Visibilityhigh-speedmachiningisacomprehensiveconcept.1992.Germany,theDarmstadtUniversityofTechnology,ProfessorH.Schulzinthe52thontheincreaseofhigh-speedcuttingfortheconceptandthescope,asshowninFigure1.Thinkdifferentcuttingtargets,showninthefigureofthetransitionarea(Transition),tobewhatiscommonlycalledthehigh-speedcutting,Thisisalsothetimeofmetalcuttingprocessrelatedtothetechnicalstaffarelookingforwardto,orisexpectedtoachievethecuttingspeed.High-speedmachiningofmachinetools,knivesandcuttingprocess,andotheraspectsspecificrequirements.Severalwerefromthefollowingaspects:high-speedmachiningtechnologydevelopmentstatusandtrends.Atthisstage,inordertoachievehigh-speedmachining,generalwiringwithhighflexibilityofhigh-speedCNCmachinetools,machiningcenters,Byusingadedicatedhigh-speedmilling,drilling.Theseequipmentincommonis:Wemustalsohavehigh-speedandhigh-speedspindlesystemfeedingsystem,Cuttingcanbeachievedinhigh-speedprocess.High-speedcuttingwiththetraditionalcuttingthebiggestdifferenceisthat"Machine-tool-workpiece"thedynamiccharacteristicsofcuttingperformanceisstrongerinfluence.Inthesystem,themachinespindlestiffness,griporform,alongknifeset,spindleBroach,torquetoolset,Performancehigh-speedimpactareimportantfactors.Inthehigh-speedcutting,materialremovalrate(MetalRemovalRate,MRR),unittimethatthematerialwasremovedvolume,usuallybasedonthe"machine-tool-workpiece"whetherProcessingSystem"chatter."Therefore,inordertosatisfythehigh-speedmachiningneeds,wemustfirstimprovethestaticanddynamicstiffnessofmachinespindleisparticularlythestiffnesscharacteristics.HSCreasonatthisstagetobesuccessful,averycrucialfactoristhedynamiccharacteristicsofthemasterandprocessingcapability.Inordertobetterdescribethemachinespindlestiffnesscharacteristicsoftheprojectpresentednewdimensionlessparameter-DNvalue,usedfortheevaluationofthemachinetoolspindlestructureonthehigh-speedmachiningofadaptability.DNvalueoftheso-called"axisdiameterperminutespeedwiththeproduct."ThenewlydevelopedspindlemachiningcenterDNvalueshavebeengreatoveronemillion.Toreducetheweightbearing,butalsowithanarrayofsteelproductsthantothemuchmorelightceramicballbearings；BearingLubricationmostimpressivemannermixedwithoillubricationmethods.Inthefieldofhigh-speedmachining.haveairbearingsandthedevelopmentofmagneticbearingsandmagneticbearingsandairbearingscombinedconstitutethemagneticgas/airmixingspindle.Feedthemachinesector,high-speedmachiningusedinthefeeddriveisusuallylargerlead,multiplehigh-speedballscrewandballarrayofsmall-diametersiliconnitride(Si3N4)ceramicball,toreduceitscentrifugalandgyroscopictorque；Byusinghollow-coolingtechnologytoreduceoperatingathighspeedballscrewastemperaturegeneratedbythefrictionbetweentheleadscrewandthermaldeformation.Inrecentyears,theuseoflinearmotor-drivenhigh-speedsystemofuptoSuchfeedsystemhasremovedthemotorfromworkstationstoSlideinthemiddleofallmechanicaltransmissionlinks,ImplementationofMachineToolFeedSystemofzerotransmission.Becausenolinearmotorrotatingcomponents,fromtheroleofcentrifugalforce,cangreatlyincreasethefeedrate.LinearMotorAnothermajoradvantageofthetripisunrestricted.Thelinearmotorisaverytimeforacontinuousmachineshopinpossessionofthebed.Resurfacingoftheverymeetingwhereaveryearlystagemovementcango,butthewholesystemofuptothestiffnesswithoutanyinfluence.Byusinghigh-speedscrew,orlinearmotorcangreatlyenhancemachinesystemofuptotherapidresponse.Themaximumaccelerationlinearmotorsupto2-10G(Gfortheaccelerationofgravity),thelargestfeedrateofupto60-200m/minorhigher.2002world-renownedShanghaiPudongmaglevtrainprojectofmaglevtracksteelprocessing,UsingtheShenyangMachineToolGroupHoldingsLimitedMcNairfriendshipcompanyproductionplantsintoextra-longhigh-speedsystemforlarge-scaleprocessingcentersachieve.Themachinefeedingsystemforthelinearguideandrackgeardrive,thelargesttablefeedrateof60m/min,Quicktripof100m/min,2gacceleration,maximumspeedspindle20000r/min,themainmotorpower80kW.X-axisdistanceofupto30m,25mcuttinglongmaglevtracksteelerrorislessthan0.15mm.MaglevtrainsforthesmoothcompletionoftheprojectprovidedastrongguaranteefortechnologyInaddition,thecampaignmachineperformancewillalsodirectlyaffecttheprocessingefficiencyandaccuracyofprocessing.Moldandthefreesurfaceofhigh-speedmachining,themainwiringwithsmallcutdeepintomethodsforprocessing.Machinerequirementsinthefeedrateconditions,shouldhavehigh-precisionpositioningfunctionsandhigh-precisioninterpolationfunction,especiallyhigh-precisionarcinterpolation.Arcprocessingistoadoptlegislationorthreadmillingcuttermoldormachiningparts,theessentialprocessingmethods.CuttingToolsToolMaterialdevelopmenthigh-speedcuttingandtechnologicaldevelopmentofthehistory,toolmaterialiscontinuousprogressofhistory.Therepresentationofhigh-speedcuttingtoolmaterialiscubicboronnitride(CBN).FaceMillingCutteruseofCBN,itscuttingspeedcanbeashighas5000m/min,mainlyforthegraycastironmachining.Polycrystallinediamond(PCD)hasbeendescribedasatoolofthe21stcenturytool,Itisparticularlyapplicabletothecuttingaluminumalloycontainingsilicamaterial,whichislightweightmetalmaterials,highstrength,widelyusedintheautomobile,motorcycleengine,electronicdevicesshell,thebase,andsoon.Atpresent,theuseofpolycrystallinediamondcutterFaceMillingalloy,5000m/minthecuttingspeedhasreachedapracticallevel.Inadditionceramictoolalsoappliestograyironofhigh-speedmachining；ToolCoating:CBNanddiamondcutter,despitegoodhigh-speedperformance,butthecostisrelativelyhigh.Usingthecoatingtechnologytomakecuttingtoolisthelowprice,withexcellentmechanicalproperties,whichcaneffectivelyreducethecost.Nowhigh-speedprocessingofmillingcutter,withmostofthewiringbetweentheTi-A1-Ncompositetechnologyforthewayofmulti-processing,Ifpresentinthenon-ferrousmetaloralloymaterialdrycutting,DLC(DiamondLikeCarbon)coatingonthecutterwasofgreatconcern.Itisexpectedthatthemarketoutlookisverysignificant；Toolclampingsystem:Toolclampingsystemtosupporthigh-speedcuttingisanimportanttechnology,Currentlythemostwidelyusedisatwo-facedtoolclampingsystem.Hasbeenformallyinvestedasacommoditymarketatthesameclampingtoolsystemare:HSK,KM,Bigplus.NC5,AHOsystems.Inthehigh-speedmachining,toolandfixturerotaryperformanceofthebalancenotonlyaffectstheprecisionmachiningandtoollife.itwillalsoaffectthelifeofmachinetools.So,thechoiceoftoolsystem,itshouldbeabalancedselectionofgoodproducts.ProcessParametersCuttingspeedofhigh-speedprocessingofconventionalshearvelocityofabout10times.Foreverytoothcutterfeedrateremainedbasicallyunchanged,toguaranteepartsmachiningprecision,surfacequalityanddurabilityofthetool,Feedvolumewillalsobeacorrespondingincreaseabout10times,reaching60m/min,Someevenashighas120m/min.Therefore,high-speedmachiningisusuallyprecludetheuseofhigh-speed,feedanddepthofcutsmallcuttingparameters.Duetothehigh-speedmachiningcuttingcushiontendtobesmall,theformationofverythinchiplight,Cuttingputtheheatawayquickly；Ifthewiringusinganewthermalstabilitybettertoolmaterialsandcoatings,Usingthedrycuttingprocessforhigh-speedmachiningistheidealtechnologyprogram.High-speedmachiningfieldofapplicationFlexibleefficientproductionlineToadapttotheneedsofnewmodels,autobodypanelmoldsandresin-preventionblocktheformingdie.mustshortentheproductioncycleandreducethecostofproductionand,therefore,wemustmakegreateffortstopromotetheproductionofhigh-speeddieintheprocess.SAICaffiliatedwiththecompanythat:Comparedtothepast,finishing,furtherprecision；thesametime,thesurfaceroughnessmustbemet,thebendingofprecision,thisshouldbesubjecttoappropriateintensivemanualprocessing.Duetotheextremelyhighcuttingspeed,andthelastfinishingprocesses,theprocessingcycleshouldbegreatlyreduced.Toplayformachiningcentersandboringandmillingmachiningcentercategoryrepresentedbythehigh-speedmachiningtechnologyandautomatictoolchangefunctionofdistinctionsPotentialtoimproveprocessingefficiency,theprocessingofcomplexpartsusedtobeconcentratedasmuchaspossiblethewiringprocess,thatisafixtureinachievingmultipleprocessescentralizedprocessinganddilutethetraditionalcars,milling,boring,Threadprocessingdifferentcuttingthelimitsoftechnology,equipmentandgivefullplaytothehigh-speedcuttingtoolfunction,NCiscurrentlyraisingmachineefficiencyandspeedupproduct