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外文翻译--发动机缸体.doc

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外文翻译--发动机缸体.doc

1英文原文EnginecylinderblockEnginecylinderblockisamorecomplexstructureoftheboxpartsintheengineparts,itshighprecision,processing,complexprocess,andtheprocessingqualitywillstillaffecttheoverallperformanceengine,soithasbecomeoneoftheenginemanufacturersfocusparts.Enginecylinderblockisthebasicenginepartsandskeletonandthegeneralassemblyofthebasecomponents.Cylindersroleissupportingandensuringthepiston,connectingrod,crankshaftandothermovingpartswork,theexactlocationtoensuretheengineventilation,coolingandlubricationtoprovideavarietyofauxiliarysystems,componentsandengineinstallation.1TechnicalCharacteristicsCylinderblockcastforawholestructure,anditsupperpart4cylindermountingholecylinderblockstandardcylinderblockisdividedintoupperandlowerdivisionsintotwopartscylinderblocktotherearofthefrontsidearrangementofthepreviousthreecoaxialmountingholeofthecamshaftandtheidleraxlehole.Cylinderblockprocessfeaturesarethestructureofcomplexshapeprocessingplane,morethanholesunevenwallthicknessandstiffnessislowprocessingofhighprecisiontypicalofboxtypeprocessingpart.Themainprocessingofthesurfaceofcylinderblocktopsurface,themainbearingside,cylinderbore,themainandcamshaftbearingboreholesandsoon,theywilldirectlyaffectthemachiningaccuracyoftheengineassemblyprecisionandperformance,mainlyrelyonprecisionequipment,industrialfixturesreliabilityandprocessingtechnologytoensurethereasonableness.2ThecylinderprocessdesignprinciplesandthebasisforengineTechnologyprogramisthepreparationofthemasterprocessistoprocessplanningandkeyprocessequipmentdesignguidancedocuments.Thecorrectprocessofprogramdesign,facilitatethesystematicapplicationofnewscientificandtechnologicalachievementsandadvancedproductionexperience,toensureproductquality,improveworkingconditions,andimproveprocesstechnologyandprocessmanagementlevel.2.1ProcessdesignprinciplesDesignTechnologyprogramshouldbetoensureproductqualityatthesametime,givefullconsiderationtotheproductioncycle,costandenvironmentalprotectionbasedontheenterprisesabilitytoactivelyadoptadvancedprocesstechnologyandequipment,andconstantlyenhancetheirleveloftechnology.Enginecylinderblockmachiningprocessdesignshouldfollowthefollowingbasicprinciples.1Theselectionofprocessingequipment,processingequipment,theprincipleofselectionadoptedtheprincipleofcombiningrigidflexible,processingeachhorizontalmachiningcenterislocatedmainlysmalloperationswithverticalmachiningcenter,thekeyprocessacrankhole,cylinderhole,balancershaftholeHighspeedprocessingofhighprecisionhorizontalmachiningcenter,anupperandlowernoncriticalprocessesbeforeandafterthefourdimensionalhighefficiencyroughmillingandhaveacertainadjustmentrangeofspecialmachineprocessing2focusonakeyprocessinprincipleprocessthebodycylinderbore,crankshafthole,BalanceShaftholesurfacefinishingandthecombinationofprecisionmillingcylinderhead,usingaprocessfocusedonasetup2programtocompleteallprocessingelementsinordertoensureproductaccuracyThekeyqualityprocessestomeetthecylindercapacityandtherelevanttechnicalrequirements3Allfixturesareusedhydraulicclamp,clampingcomponents,hydraulicpumpsandhydrauliccontrolcomponentsusedinGermanyortheUnitedStatesproducinghighqualityandreliablecomponents4Thewholelineusedinallwetprocessing,usingstandaloneBTA,highprecisionmachiningprocessescriticalhorizontalmachiningcenterwithconstantcoolingandtoinstallhighprecisionhighvoltagedoublecircuitbandpassfinefiltrationsystem,allwithhighpressureprocessingcenterinthecold.Accordingtothetechnologicalcharacteristicsofautomobileenginecylinderblockandtheproductionmandate,theengineblockmachiningautomaticproductionlineiscomposedofhorizontalmachiningcenterCWK500andCWK500Dmachiningcenters,specialmilling/boringmachine,verticalmachiningcentersmatec30Landotherappliances.1topandbottom,andtilecoveredonlythecombinationofapertureroughmillingmachinededicatedtothismachinetodoublesidedhorizontalmillingmachine,usingmovingtabledrivenparts,machinetoolsimportedSiemensS7200PLCsystemcontrol,machinecontrolcabinetsetupanindependent,cuttingautomatetheprocessiscompletedandtwokindsofautomaticandadjustthestate2highspeedhorizontalmachiningcentermachiningcentercanberealizedCWK500themaximumflowofwetprocessing,butbecauseofequipment,automaticBTAtreatmentsystemthroughthebuiltintrayunderthewidetypechipconveyorandthecompletionofthemachiningcentercanbedryprocessingmachinetoolspindlespeed6000r/min,rapidfeedingspeed38m/min3ThecombinationoffrontandrearfaceroughmillingmachinetoolusinghydraulictransmissioncontrolsystemimportedSiemensS7200PLCsystemcontrol,machinetoolshaveacertainflexibility4ThespecialmachineTXK1500thismachineverticalmachiningcenterbythemodificationofshape,withverticalmachiningcenterfeaturesandperformance,thismachinehashighstrength,highwearresistant,highstability,highaccuracy,highprofileetc.5highspeedverticalmachiningcentermatec30Lofthemachiningcenterspindlehighspeed9000r/min.ControlsystemusesSiemensSINUMERIK840Dcontrolsystem6highspeedhorizontalmachiningcenterspindleCWK500Dhighestspeed15000r/min.2.2ProcessdesignbasisAffecttheengineblockpartoftheprocessdesignfactorsaremanifold.Specifically,canbeunderstoodfromthefollowingaspects.1productobject,productdrawingsandtechnicaldocumentsrelatedtothecomplexityoftheengineblockundertheprecisionrequirementsoftheprocesstotakecorrespondingmeasures.Productiontargetsforthefourcylinderautomobileenginecylinderblock2theproductionprogram,theproductionofthenatureandtypeofproductionoftheengineblocktheproductionprogramof400million3Theannualeffectivesystemofworkequipment,workingfor320days,withanaverageequipmentloadingrateof80,twoshifts,16hours/day.3Themaincontentofenginecylinderblockmachiningprocessdesign3Enginecylinderblockmachiningprocesscharacteristicsmainlyflatandtheholeprocessing,processingofflatgenerallyuseplaning,millingmethodssuchasprocessing,processingofholeusedmainlyboring,processingandmultipurposedrillingholes.Asthecylindercomplexstructure,sohowtoensurethatthemutualpositionofthesurfaceprocessingprecisionisanimportantissue.3.1TheselectionofblankEngineblockonthematerialsusedaregenerallygraycastironHT150,HT200,HT250,thereisalsocastaluminumorsteelplate,thisengineblockusinghighstrengthalloycastiron.Cylinderintheprocessingpriortoagingtreatmentinordertoeliminatestressandimprovetheroughcastingmechanicalproperties.Improvetheroughaccuracy,reductionofmachiningallowance,istoimprovetheautomatedproductionlinesystemproductivityandprocessingqualityoftheimportantmeasures.Astheforeignboxtypepartsofroughqualityandhighprecision,anditsproductionlinesystemhasbeenimplementeddirectlyontheblankline,notonlyeliminatingtheneedforblankcheckdevicealsosavestheroughqualityproblemsduetowasteofmachiningtime,increaseoverallefficiency.Therefore,therefinementofroughistoimprovetheproductivityofthemostpromisingwayout.Fortheengineblockproductionline,canberoughinpartsonlinepremillingsixface,removingmostofthemargin,tofacilitatedirectonlineparts.3.2machiningprocessselectionandprocessingofthebenchmarkChoosetherightprocessingtechnologybaseisdirectlyrelatedtotheprocessingqualitycanensuretheparts.Generallyspeaking,processbenchmarkingcanbedividedintocoarseandfinereferencebase.1Thebaselinefortheonlinethickrough,whichisparticularlyimportantthechoiceofbenchmarkcrude,ifcrudebenchmarkchoiceunreasonable,willtheunevendistributionofmachiningallowance,processingandsurfaceoffsets,resultinginwaste.Inthecylinderproductionline,wehaveadoptedforthecoarsesideofthebase2refinedthebaseofthisboxfortheengineblockparts,thegeneraluseofsidetwosalesforafullrangeofuniformbenchmarks.Forthelongerautomatedproductionlinesystem,duetopinholesinthecourseofthewearandtearcausedbyinaccuratepositioning,therefore,willbedividedinto23segmentpinholesused.Inthecylinderpinholeoftheprocess,wehaveadoptedtotheside,bottomandthespindleholepositioning,intheprocessingcenterontheprocess.3.3MachiningProcessingStagesandprocessesofthearrangementsOftenapartofmanyapparentneedforprocessing,ofcourse,thesurfacemachiningaccuracyaredifferent.Processingofhighprecisionsurface,oftenafterrepeatedprocessingAsfortheprocessingofthesurfaceoflowprecision,onlyneedtogothroughoneortwoonthelist.Thus,whenthedevelopmentprocessinordertoseizetheprocessinghighprecisionsurface,thisconflict,thereasonablearrangementprocessesandrationaldivisionstageofprocessing.Arrangetheorderoftheprincipleofprocessisafterthefirstcoarserefined,thefirstsurfaceafterthehole,thefirstbenchmarkother.Intheengineblockmachining,thesameshouldfollowthisprinciple.1roughingstageengineblockmachiningprocess,thearrangementsforroughingprocess,tofullycarryoutroughrough,trimmostofthemargininordertoensureproductionefficiency42semifinishingphaseoftheengineblockmachining,inordertoensuretheaccuracyofsomeimportantsurfaceprocessing,andarrangesomesemifinishingoperations,willberequiredaccuracyandsurfaceroughnessofthesurfaceofthemiddleofsomeprocessingtocomplete,whiledemandingthesurfaceofsemifinished,toprepareforfuturefinishing3Thefinishingstageofrequiringhighaccuracyandsurfaceroughnessofthesurfaceprocessing4secondaryprocessing,suchassmallsurfacescrewholes,youcanfinishofthemajorsurfaceaftertheonehand,whentheworkpiecedeformationprocesslittleimpactatthesametimealsoreducedtherejectionrateInaddition,ifthemainsurfaceofawaste,thesesmallthesurfacewillnothavetobeprocessed,thusavoidingawasteofmanhours.However,iftheprocessingisveryeasyforasmallsurfacebumpsthemainsurface,itshouldbeplacedonasmallsurfacefinishpriortothemainsurfacefinishing5shouldmakeproperarrangementsforsecondaryprocessessuchasproductinspectionprocess,inpartroughingstage,thekeyprocessbeforeiningProcessingStagesandprocessTandafterprocessing,sparepartsalltheprocessinghasbeencompleted,shouldbeappropriatearrangements.Stageofprocessingdivision,hasthefollowingadvantagesFirst,itcantakemeasurestoeliminatetheroughworkpieceafterthestress,toensureaccuracysecond,finishingontheback,andwillnotdamageduringtransportthesurfaceoftheworkpiecehasbeenprocessedagain,firstroughingthesurfacedefectscanbedetectedearlyandpromptlydealwithrough,donotwasteworkinghours.Butmostsmallparts,donotsubverythin.3.4cylindersurfaceofthemainprocessingandsecondaryprocessesCylindersurfaceandsupportthemainprocessingoperationsare1planeprocessingAtpresent,themillingofengineblocksistheprimarymeansofplanarprocessing,domesticmillingfeedrateisgenerally300400mm/min,andforeign20004000mm/minmillingfeedratecomparedtofarcry,tobeonincreasing,therefore,improvethemillingfeedrate,reduceoverheadtimeistoimprovetheproductivityofthemajormeansoffinishinganumberofplaneengineblockwhenthemillingfeedratetoreach2399mm/min,greatlyimprovedefficiencyTopsurfaceofthecylindermillingisakeyprocessintheprocess,theflatnessrequirementsfor0.02/145mm,thesurfaceroughnessofRa1.6um.Processinginthecylinder,theuseofsideandspindlebearingborepositioning,top,bottomandmiddlevagayonlyaperturewhileprocessingusedintheprocessinglineoutsideoftheknifedevicecanbettermeettheengineblockmachiningaccuracy2Generalholesmachiningholesingeneralarestillusingthetraditionalprocessingofdrilling,expansion,boring,reaming,tappingandothercraftapproach.Issuesinthedesignprocessofspecificprograms,useofcoatedcuttingtools,cuttingtoolsandotheradvancedtoolswithinthecooling,andusingalargeflowofcoolingsystems,greatlyimprovingthecuttingspeed,improvedproductivityhekeyprocessbeforeiningProceW3deepholeprocessingofthetraditionalprocessingmethodisusedtogradetwistdrillfeed,lowefficiencyoftheirproduction,processingandqualityispoor.Thedeepholeintheengineblockprocessing,theuseofgundrillingprocess

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