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外文翻译-关于焊接滚轮架轴向窜动的实验研究.doc

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外文翻译-关于焊接滚轮架轴向窜动的实验研究.doc

第1页JOUNALOFMATENALSPROCESSINGTECHNOLOGY631997881886EXPERIMENTANDSTUDYINTOTHEAXIALDRIFTINGOFTHECYLINDEROFAWELDINGROLLERBEDFENGGANGSHEN,XIDEPAN,JINXUEWELDINGRESEARCHINSTIUTE,XIANJIAOTONGUNIVERSITYXIANSHAANXIPROVINCE710049PRCHINAABSTRACTTHEBASICTHEORYOFTHEAXIALDRIFTINGOFTHECYLINDEROFAWELDINGROLLERBEDISINTRODUCEDINTHEPAPER,ANDATTHESAMETIMEEXPERIMENTANDSTUDYONTHEMECHANISMOFTHEAXIALDRIFTINGOFTHECYLINDERHAVEBEENDONEONANEXPERIMENTALMODELOFTHEWELDINGROLLERBEDITISSHOWNTHATTHEMAINCAUSEOFTHEAXIALDRIFTINGOFTHECYLINDERLIESINTHEEXISTENCEOFASPIRALANGLEBETWEENTHECYLINDERANDTHECYLINDERANDTHEROLLERTHERELATIVEAXIALMOTIONSBETWEENTHEROLLERANDTHECYLINDERARECOMPOSEOFSPIRALMOTION,ELASTICSLIDINGANDFRICTIONALSLIDINGTHETHEORYOFCOMPATIBLEMOTIONANDNONCOMPATIBLEMOTIONISPUTFORWARDFORTHEAXIALMOTIONSOFTHECYLINDERTHERELATIVEAXIALMOTIONSOFTHECYLINDERTHERELATIVEAXIALMOTIONBETWEENTHEROLLERSANDTHECYLINDERISCOORDINATEDBYELASTICSLIDINGANDFRICTIONALSLIDINGBETWEENTHEMKEYWORDSWELDINGROLLERBED;CYLINDER;ROLLER;AXIALMOTION;SPIRALANGLE1INTRODUCTIONINWELDINGPRODUCTION,THEASSEMBLYANDCIRCULARSEAMWELDINGOFROTARYWORKPIECES,SUCHASABOILER,APETROCHEMICALPRESSUREVESSELANDSOON,ARECONDUCTEDON;AWELDINGROLLERBEDWHENROTATINGONAWELDINGROLLERBEDTHECYLINDEWILLINEVITABLYPRODUCEAXIALDRIFTINGDUETOMANUFACTURING,ASSEMBLINGTOLERANCEOFTHEWELDINGROLLERBEDANDTHECYLINDER’SSURFACEIRREGULARITYDIVERGIUGFROMANIDEALROTARYWORKPIECE,THUSTHEWELDINGPROCEDUREMAYNOTBECARRIEDOUTSUCCESSFULLYITISNECESSARY,THEREFORE,TOSTUDYTHEMECHANISMOFTHEAXIALDRIFTINGOFTHECYLINDERTOSOLVETHEPROBLEMOFTHEAXIALDRIFTINGOFTHECYLINDERINCIRCUMFERENTIALWELDINGTHERESULTSOFTHERESEARCHWILLBENEFITTHESTUDYINGANDDESIGNINGOFANTIDRIFTINGWELDINGROLLERBEDESPECIALLYTHEANALYSISOFTHEAPPLIEDFORCESONTHEBED,ANDLEADTODETERMININGTHEMANUFACTURINGANDASSEMBLINGTOLERANCEOFTHEBED,ANDPROVIDINGTHEBASISOFTHEORYFORTHEMECHANICALADJUSTINGMODETOAVOIDAXIALDRIFTING,THEADJUSTINGMODEOFCLOSEDCIRCUITINTHECONTROLCIRCUIT,ANDTHESELECTIONOFTHEADJUSTINGVALUE2THEORETICALANALYSIS21WELDINGROLLERBEDANDCYLINDERAWELDINGROLLERBEDISGENERALLYCOMPOSEDOFFOURROLLERSDRIVENBYTHE第2页DRIVINGROLLER,THECYLINDERMAKESAROTARYUNIFORMMOTIONAROUNDITSAXISSHOWNINFIGI,DURINGWHICHTHECIRCUMFERENTIALWELDINGPROCEDUREISCARRIEDOUTINFIG1,AISTHECENTRALANGLE,SISTHESUPPORTINGDISTANCE,LISTHESPANOFTHEROLLERANDV,ISTHECIRCULARLINEARVELOCITYOFTHECYLINDER,ALSONAMEDTHEWELDINGVELOCITY2THEAXISOFTHECYLINDERWILLBENOTPARALLELTOTHATOFAROLLERIFTHEROLLERISDEFLECTEDBYACERTAINANGLEFROMTHEDEALPOSITION,ORIFTHECENTERSOFTHEFOURROLLERSLIEINTHEVERTICESOFASIMPLEQUADRILATERAL,ORIFTHECENTERSOFTHEFOURROLLERSARENOTONTHESAMEPLANE,ORIFTHECIRCULARITYOFTHECYLINDERISIRREGULARBECAUSEOFDEVIATIONINMANUFACTURINGANDASSEMBLINGTHUSTHECYLINDERWILLNEVITABLYMOVEALONGITSAXISWHENROTATINGONABEDTHECONTACTOFTHECYLINDERANDAROLLERCANBECANSIDEREDASPOINTCONTACTIFCYTINDER’SAXISANDROLLER’SAXISDONOTLIEINTHESAMEPLANESUPPOSEPISTHEPOINTOFCONTACTTHECYLINDER’SNORMALPLANEAISDEFINEDBYTHEPLANEONWHICHARETHECYLINDER’SAXISANDGENERATRIXNACROSSTHEPOINTOFTANGENCYONTHECYLINDERSHOWNINFIG2MAKEACYLINDER’STANGENTPLANEBACROSSPOINTPTHUS,PLANEAISVERTICALTOPLANEBLCISACYLINDER’STANGENTACROSSPANDLIESINPLANEBIRISTHEROLLER’STANGENTACROSSTHESAMEPOINTP,ANDLIESINPLANEBALSOINGENERAL,ΘISDEFINEDASTHEAXIALDEVIATIONANGLEBETWEENTHEROLER’SAXISANDTHECYLINDER’SAXIS;ΒISDEFINEDASTHESPIRALANGLEBETWEENGENERATRIXNANDM’APROJECTIVELINEOBTAINEDBYPROJECTINGTHEROLLER’SGENERATRIXMACROSSPOINTPONPLANEBANDΓISDEFINEDASTHEPROJECTIVEANGLEBETWEENNANDM,APROJECTIVELINEOBTAINEDBYPROJECTINGMONPLANEAFIG3INDICATESTHATTHERELATIONSHIPAMONGSTTHETHREEANGLESISTANΒTAN2ΘTAN2ΓINFIG3,SB,SΘANDSΓ,ARECALLEDTHESPIRALDISPLACEMENTVECTOR,THEAXIALDEVIATIONDISPLACEMENTVECTORANDTHEPROJECTIVEDISPLACEMENTVECTORRESPECTIVELYTHEIRRELATIONSHIPBEING第3页FIG2GEOMETRICRELATIONSHIPBETWEENTHECYLINDERANDANINDIVIDUALROLLERFIG3RELATIONSHIPBETWEENTHEANGLEVECTORANDTHEDISPLACEMENTVECTOR222RELATIVEAXIALMOTIONSRELATIONSHIP1SPIRALMOTION2FIG4COMPONENTOFAXIALVELOCITYBECAUSETHEROLLER’SAXISISNOTPARALLELTOTHECYLINDER’SCENTRALLINE,THEREISASPIRALANGLEΒBETWEENVR,ANDVC,ONTHEPOINTOFCONTACTSHOWNINFIG2WHENTHEROLLERANDCYLINDERROTATESYNCHRONISTICALLYAROUNDTHEIROWNAXES,DRIVENBYTANGENTIALFRICTIONALFORCEASPIRALEFFECTWILLOCCURBECAUSEOFTHEDIFFERENT第4页LINEARVELOCITYDIRECTIONBETWEENTHEROLLERANDTHECYLINDERATPOINTPOFCONTACTTHECYLINDERHASACOMPONENTOFAXIALVELOCITY,WHEREVCISTHECIRCULARLINEARVELOCITYOFTHECYLINDERISTHECYLINDER’SAXIALCOMPONENTVELOCIRYEXERTEDBYSINGLEROLLER,ANDJCANBE12,3,4,REPRESENTINGTHEFOURROLLERS,RESPECTIVELY2ELASTICSLIDINGBECAUSEOFTHEEXISTENCEOFASPIRALANGLE,ANAXIALFORCEFAJACTSONCYLINDERWHENTHEFORCEISLESSTHANTHEMAXIMUMAXIALFRICTIONALFORCEFNJWHEREFISTHEFRICTIONFACTOR,ANDNJISTHENORMALPRESSUREBETWEENASINGLEROLLERANDTHECYLINDER,THECYLINDERWILLSLIDEELASTICALLYOVERTHEROLLERALONGTHEAXIALDIRECTION23THECOMPONENTOFTHESLIDINGVELOCITYISWHEREEISTHEELASTICSLIDINGFACTORFORMETALLICROLLEREOOOL00053FRICTIONALSLIDINGWHENFAJISGREATERTHANTHEMAXIMUMFRICTIONALFORCEFNJ,THECYLINDERWILLMAKEAFRICTIONALSLIDINGOVERTHEROLLERTHESLIDINGRESISTANCEISFNJ3THECOMPONENTOFTHEFRICTIONALSLIDINGVELOCITYO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