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1、附录C620lathemainaxlestructuretransformationdesignRenFujunhuangrulinwangqunAbstract:TheC620lathemainaxlefrontbearing,changespresent'sD3182120rollingbearingstructurebytheoriginalslidingbearing,itsprincipaladvantageistherigidityisgood,therotationalspeedishigh
2、,andrevolves,therotationprecisiontobehighsteadily,theradialdirectionbeatssmall,thethermostabilitytobegoodaswellastheassemblytechnologycapabilityisgood.Enhancestheproductadvantageouslytheworkingaccuracyandtheproductivity,lengthensequipment'sservicelife,red
3、ucesthemaintenancecost,raisestheequipmentutilizationrate.Keyword:Mainaxle,slidingbearing,rollingbearing,lubrication1transformationreasonltheC620lathemainaxlefrontbearingisusestheslidingbearingstructure,thespindlespeeddefinedthatinnmax=inthe600r/minscope,t
4、hiskindofbearinginhigh-speedcutting'ssituation,thebearingisextremelyeasytogiveoffheat,thetemperaturereachesashighas70oC;Spedupbearing'snaturalattritionobviouslyunderthiscondition,thusreducedmainaxle'sservicelife,causesthemainaxlerotationprecisiongradualre
5、duction,theverygreatdegreehasaffectedtheworkingaccuracyandtheproductionbenefit.Becauseslidingbearing'smaterialusesZQSn6-6-3generally,theserviceiscomplex,theaxisblowsgrindsrequestshigh,thetechnicaldifficultyisbig,themaintenancecostisalsohigh.Simultaneously
6、thebearingclearanceadjustmentdifficulty,thegapisoversized,theworkingaccuracyreachesdoesnotrequest;Thegapistoosmall,willappeargivesoffheatevenformsthestuffyvehiclephenomenon.issolvestheabovemalpractice,theslidingbearingchangesrollingbearing'sstructurebefor
7、etheoriginalmainaxle,simultaneouslyenhancesthespindlespeedtonmax=900r/min,madetheobsoleteequipmenttoenhancetherigidityandtherotationprecision,raisedequipment'susefactor.2transformationprocessindoesnotaffectthemainaxleothershaftingcomponentsstructureundert
8、hepremisetoopentheoriginalfrontbearing,andcarriesontheremanufactureprocessingtotheoriginalfrontbearingholeandthemainaxle.LikeFigure1,showninFigure2,anddesignstheaxisfrontbearingwhichmanufactureasshowninFigure3.Itsst
