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1、外文资料ThecrankprocessesspecificationanddevelopmentdirectionThecrankprocessesspecificationThecrankspecificationisveryhigh,itsmachine-finishingtechnologicalprocessdifferentandthecrankcomplexdegreehastheverybigdifferencealongwiththeproductionguidingprinciple,butincludesfollowingseveralmainstagesgen
2、erally:Localizationdatumprocessing;Thick,lathefinishingandroughgrindingeachhostneckandotherouterannuluses;CheLianjing;Drillstheoilhole;Correctgrindingeachhostneckandotherouterannuluses;CorrectgrindingLianJing;Big,capitellumandkeyslotprocessing;Journalsurfacetreatment;Transientequilibrium;Super
3、finishingvariousjournals.Maysee,themainneckorLianJingtheturningworkingprocedureallseparateswiththegrindingworkingprocedure,isoftenmiddlearrangementsomedifferentmachinedsurfacesortheheterogeneityworkingprocedure.Aftertheroughmachiningcanhavethedistortion,thereforethenormalforcereducesgradually;
4、Becausesimultaneouslythick,theprecisionworkworkingprocedurecarriesonseparatelybefore,thelatterworkingprocedurehasthepossibilitytoeliminatetheworkingprocedureerror,finallyobtainstheveryhighprecisionandtheverylowroughness.Thick,theprecisionworkseparates,andarrangesthealignmentworkingprocedurebeh
5、indthecuttingforcebigworkingprocedure,guaranteestheprocessingprecision.Inordertoreducethedistortionwhichthecuttingforcecauses,guaranteedwhenprecisionworkprecisionrequest,correctgrindingvariousjournals,usesthesinglegrindingwheelinturngrindinggenerally.Thejournalprocessingrequestshigh,themainnec
6、kandtheneckusescontinuallyprocessesmanytimes.CrankmachiningdevelopmentdirectionAlongwithourcountrynumericalcontrolenginebedunceasingincrease,thecrankroughmachiningwillbewidespreadusesinthenumericalcontrollathe,thenumericalcontrolthemillingmachine,thenumericalcontrolvehiclebroachingmachineandso
7、ontheadvancedequipmenttothemainjournal,theconnectingrodjournalcarriesonthenumericalcontrolturning,inthemilling,thevehicle-broachingprocessing,bywilleffectivelyreducetheamountofdeformitywhichthecrankwillprocess.Thecrankprecisionworkwillb
