外文翻譯---孔加工技術發(fā)展動向.doc

HoleprocessingtechnologicaldevelopmenttrendInthemachinepartsprocessingwork,theholeprocessingaccountsfortheproportionquiteinabigway,withhighspeedvistatesimilarishighspeed,thehighaccuracydrillstruncatestheprocessingtoproposetheagenda,thehighefficiencyholeprocessingregardingurgesthesparepartrationalizationofproductionistheindispensableimportanttechnologicalprocess.Inrecentyears,thesparepartproductionmostlyusedtaketheCNCenginebedasthecentralproductionshape,whencarriedontheholeprocessing,alsomostlyusedtheprocessingcenter,theCNCelectricalfinishingtoolandsoontheadvancedequipment.Regardlessofwhichdomainholeprocessing,therealizationhighaccuracyandishighspeedallisobtainstheuserorderformtheimportantcompetitionmethod.Thehighspeedholeprocessingusestheprocessingcenter(MC)conditionTherealizationholeprocessinghighspeedpreconditionismustusethehighspeedprocessingcenter,buttheenginebedishighspeedmustsatisfythefollowingcondition.1.ProvideshighspeedrotatesthemainaxleThedrillbitandtheendmillequallyhavethecentraltooth,becausenearbythecentraltoothhasonekindofcircumferentialvelociy,therefore,cuttingspeedtohighspeeddevelopmenttime,themainaxlerotationalspeedalsomustrealizehighspeed.Speciallywhenuseminordiameterdrillbit,themainaxleishighspeedisessential.Fromnowon,alongwiththeholeprocessinghighspeedprogress,estimatedtherotationalspeedwillreach30,000100000r/minthemainaxledemandunceasinglytoincrease.Atthesametime,becauseachievedthestipulationthehighspeedrotationneedsthetimetobeveryshortaswellastorequestZthemainaxleswingingradiustobesupposedtocontrolto(drillbitdirectionofcut)inthemostmilddegree,therefore,thehighspeedmainaxledispositionistherealizationhighspeedhighaccuracyholeprocessestheessentialcondition.2.MaymovepartiallyhasMovedquicklythefunctionThemainaxleandtheworktableandsoonmaymovepartiallyshouldreducetheweightasfaraspossible,realizesthemovementquicklytomelt,thisalsocarriesontheconditionwhichthehighspeedholeprocessingmusthave.1holeprocessperiodonlyneedsseveralseconds,therefore,mustreducebetweenholeandholethetooltimeoftravel,thisrealizesthehighefficiencycuttingkeyquestion,solvesthisquestionwayfirstnamelyfortobepossibletomovethepartthemovementtohavetobenimblequickly.Forexample,evenifhasachievedthehighaccuracypointingaccuracy,butliketheenginebedmaymovethepartialmovementsinsufficientlykeenquickly,alsoisimpossibletherealizationhighspeedholeprocessingrequestwhichsatisfiesthecurrentusertopropose.Usuallyis(theGvalue)judgestheenginebedwiththeaccelerationcharacteristictobepossibletomovethepartialquickperformance,whenG=0.81.5,mayjudgethisenginebedfortohavethehighlyquickperformancetheprocessingcenter.3.TheworktableandtheenginebedoverallareaproportionshouldbesmallerMovequicklyastheprocessingcenterusers,theyhopeworkstationsandworkstationsoutsideofthespaceoccupiedbysomeaspossible.ParticularlyKongprocessingthesecostsarehigherandlowervalue-addedprocessingarea,thebestuseofthatstructuretightprocessingcenter.IfJapanshigh-speedphysical-chemicaltestingofCNCmillingmachineInstitute,thescopefor300mm2processing,machinetoolsidentitycovering950mm2,machinetoolscoveringaboutthreetimesthesizeofherbiggestchain,thewholestructurerathertight.45000r/minrotationalspeedforthemainaxismillingmachine,ahigh-speedmachinescan.XYaxisorientationformobilestructure(workstationsonlyZaxismovement),itsaccelerationcharacteristicsvalueG=1.5thatthequickactionofamachinetoolfunctions.4.ThemainaxlemaydirectlysupplytherefrigerantIndrillstruncatesintheprocess,processesL/D(bitsKongdiameteranddeepover)tohavespeciallytopayattentiontotherowoffilingsquestionin5abovehole,bestselectsthebeltfortheoilholedrillbit,inordertocarriesonthestableprocessing.Usesbythemainaxlecentersuppliesrefrigerantway,regardingreplacestheclampingapparatusthelockingboltthenismoreconvenient.5.HastheholeprocessingtoinsertwiththeCNCtoolmakesupthefunctionTheCNCcuttingcharacteristicliesinmaycarryontheinspectiontoolpaththereasonableprocessing,whencarriesontheCNCmachiningtothehole,mayusethespiralcutting,highwalkknives,tocutsandsoonthetoolinsertsmakesuptheway,hasthesefunctionstheCNCcontrolsystemtobepossibletoperformintheholeprocessingtoapply.StridesinthehighspeeddrillholetoprocessthenewtimeSincelongagoalliscarriesonthehighaccuracyholeusingthedrillbit,ThreadKongandsoonpassestheholeandtheboltholeandsoontheprocessing,recently,thiskindofprocessingalreadyrapidlydevelopedtothehigh-speedcuttingdirection.Intheholeprocessingwork,atpresentstillmassivelyusedthehigh-speedsteeltwistdrill,butbetweenvariousenterpriseshasgraduallypulledopenthedisparityintheholeprocessingprecisionandtheprocessingefficiencyaspect.High-speedcuttingdrillbitmaterialbyceramiccoatinghardalloyprimarily,ifMAZAKCorporationandwoodsprecisioninstrumentmanufacturewhenprocessingcastiron,namelyhasusedtheceramiccoatingdrillbit.Whenprocessesthealuminumalloyandsoonthecoloredmaterial,mayusethediamondcoatinghardalloydrillbit,theDLCcoatinghardalloydrillbitorthebeltdiamondagglutinatesthebodyknifetoothdrillbit.Inbrief,willbeableunceasinglytoopenfromnowonsendsoutmanynewhigh-speedcuttingdrillbits.Ineachkindofcoatingdrillbit,theceramiccoatinghardalloydrillbitspeciallytakestheresistancetowear,thethermalstabilityandthelubricatingability,itscoatingcraftalsoadoptsthemultilayeredspreadingway,likeusingTiAlN,TiN,TiCNandsoonthecompoundnitrideformsthecompoundcoatingstructure.Thedrillbitcuttingconditionalwaystendencyishighspeed,alongwithisprocessedthematerialthedifference,thecuttingspeedhasbeenpossiblerespectivelytoachieve200300m/minThehighspeeddrillbitcuttingisonekindhighspeedgreatlyentersforthequantitydevelopmenttendency,similarballendmillcuttingconditiondevelopmenttendency.Thecuttingpracticeindicatedthat,enhancesthecuttingspeedtobeadvantageoustoswarftheshaperationalizationandimprovementprocessingsurfaceroughness,estimatedfromnowonstillwilldevelopalongthehigh-speedcuttingdirection；Enhancestobreaksfilingsrowoffilingsforthequantityandlengthensthecuttingtoollifetobeextremelyadvantageous,therefore,alsostillalonggreatlywillenterfromnowonforthedirectionunceasinglydeveloped.Atpresent,th