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外文翻译--研究利用差动齿轮系实现机械混合压力.doc

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外文翻译--研究利用差动齿轮系实现机械混合压力.doc

WWW88DOC88COMWWW88DOC88COMSCIENCEINCHINASERIESETECHNOLOGICALSCIENCES2007SCIENCEINCHINAPRESSSPRINGERVERLAGSTUDYOFUTILIZINGDIFFERENTIALGEARTRAINTOACHIEVEHYBRIDMECHANISMOFMECHANICALPRESSHEYUPENG1†,ZHAOSHENGDUN2,ZOUJUN2ZHANGZHIYUAN21SCHOOLOFMECHANICALENGINEERING,NANJINGUNIVERSITYOFSCIENCETECHNOLOGY,NANJING210094,CHINA;2SCHOOLOFMECHANICALENGINEERING,XI’ANJIAOTONGUNIVERSITY,XI’AN710049,CHINATHEPROBLEMSOFHYBRIDINPUTOFMECHANICALPRESSARESTUDIEDINTHISPAPER,WITHDIFFERENTIALGEARTRAINASTRANSMISSIONMECHANISMITISPROPOSEDTHAT“ADJUSTABLESPEEDAMPLITUDE”OR“DIFFERENTIALSPEEDRATIO”ISTHEIMPORTANTPARAMETERSFORTHEHYBRIDINPUTMECHANISMITNOTONLYDEFINESTHEAMPLITUDEOFTHEADJUSTABLESPEED,BUTALSODETERMINESTHERATIOOFTHEPOWEROFTHESERVOMOTORTOTHEPOWEROFTHECONVENTIONALMOTORTHECALCULATINGEQUATIONSOFTHERATIOOFTRANSMISSIONINALLAXES,THEPOWEROFTWOMOTORS,ANDTHEWORKINGLOADDISTRIBUTIONAREDEDUCEDTHETWOKINDSOFDRIVINGSCHEMESAREPUTFORWARDTHATTHESERVOMOTORANDTHECONVENTIONALMOTORSIMULTANEOUSLYDRIVEANDTHESERVOMOTORANDTHECONVENTIONALMOTORSEPARATELYDRIVETHECALCULATINGRESULTSDEMONSTRATETHATTHELATTERSCHEMECANUSEMUCHLOWERPOWEROFTHESERVOMOTOR,SOTHISSCHEMEMAKESMANUFACTUREANDUSECOSTMUCHLOWERTHELATTERSCHEMEPROPOSESAFEASIBLEWAYTOAPPLYTHEHYBRIDMECHANISMOFMECHANICALPRESSINPRACTICEENGINEERINGMECHANICALPRESS,HYBRIDMECHANISM,DIFFERENTIALGEARTRAIN,ADJUSTABLESPEED1INTRODUCTIONATPRESENTTHEREAREMANYRESEARCHPAPERSABOUTTHEHYBRIDMECHANISMOFMECHANICALPRESS,ANDITHASBECOMEAHOTRESEARCHTOPICTHEHYBRIDMECHANISMISAMECHANISMWITH2DEGREEOFFREEDOMALSOCALLEDDIFFERENTIALSPEEDMECHANISM,ANDWHENTWOINDEPENDENTMOTIONSAREINPUTATTHESAMETIME,THEOUTPUTTHATCANSATISFYSOMEMOTIONREQUIREMENTSISOBTAINEDTHROUGHTHEMOTIONCOMPOSITIONOFTHEMECHANISMTHEHYBRIDMECHANISMISALSOCALLEDCONTROLLABLEMECHANISM,ORHYBRIDMACHINETHEPURPOSEOFRESEARCHONHYBRIDMECHANISMOFMECHANICALPRESSISUSINGCONVENTIONALMOTORWITHBIGPOWERCARRYINGFLYWHEELTOFINISHSTAMPINGWORKPIECES;ANDUSESSERVOMOTORWITHLOWPOWERTOADJUSTTHESLIDERSPEEDTHEADVANTAGESOFTHEHYBRIDMECHANISMAPPLIEDINTHEMECHANICALPRESSARETHATITNOTONLYCANREDUCEMUCHLOWERMANUFACTURINGCOSTTHANSERVOPRESS,BUTALSOHASAFLEXIBLEWORKINGVELOCITYOFSLIDER1SOTHEMECHANICALPRESSOFHYBRIDMECHANISMAROUSESMANYRESEARCHERS’INTERESTINWORKINGONIT;ANDTHESESTUDIESAREMAINLYFOCUSEDONTHEMULTIBARHYBRIDMECHANISMDUANDGUO1,2HAVECOMPREHENSIVELYDISCUSSEDTHESEVENBARHYBRIDMECHANISMOFMECHANICALPRESS,INCLUDINGTHEFEASIBLECONDITIONSOFCOMPOSITIONOFTHELINKAGEMECHANISM,THESLIDERMOTIONANALYSIS,ANDTHETORQUEANDPOWERDISTRIBUTIONBETWEENTHETWOMOTORSASWELLASTHEOPTIMALDESIGNTHETRAJECTORYPLANNINGBASEDWWW88DOC88COMWWW88DOC88COMONPOLYNOMIALINTERPOLATIONISALSOINVESTIGATED,ANDTHECOMPUTERSIMULATIONSHOWSTHATTHERESULTISINDEEDATTRACTIVEINADDITION,MENG3HASALSOINVESTIGATEDTHEKINEMATICALANALYSISOFTHESEVENBARMECHANISM,ANDTHEOPTIMALDESIGNHASBEENCOMPLETEDBASEDONTHEMINIMUMPOWEROFTHESERVOMOTORMOTOR,ANDMENGHASPROPOSEDTHATTHEHYBRIDMECHANISMISARESEARCHDIRECTIONOFTHEMECHANICALPRESSTOKUZ4FIRSTPUTFORWARDOFTHEHYBRIDMECHANISMANDANALYZEDTHEVELOCITYSYNTHESISBYUSINGTHEDIFFERENTIALGEARTRAINHISEXPERIMENTCONFIRMEDTHEFEASIBILITYOFHISCONCEPTIONTHECONCEPTSOFTHEADJUSTABLESPEEDAMPLITUDEANDDIFFERENTIALSPEEDRATIOARENOTMENTIONEDINTHEIRWORKS,ANDTHERELATIONSHIPBETWEENTHEVELOCITYVARIATIONANDTHEPOWEROFTHETWOMOTORSWERENOTCLEARLYGIVEN58BUTTHESECONCEPTSAREVERYIMPORTANTANDABSOLUTELYNECESSARYFORTHEHYBRIDMECHANISMTOSELECTTHETWOMOTORS’POWERANDDETERMINETHEWORKINGLOADDISTRIBUTIONBETWEENCONVENTIONALMOTORANDTHESERVOMOTORINREFS13THEYUSEDLINKAGEMECHANISMTOIMPLEMENTTHEHYBRIDINPUTOFMECHANICALPRESSTHEMETHODISVERYCOMPLEXBECAUSETHECHANGEOFTHELENGTHANDPOSITIONOFTHEEACHBARINLINKAGEMECHANISMWILLHAVEANEFFECTONTHEMOTIONOFTHESLIDEOFTHEMECHANICALPRESSSOSOMEPRINCIPALPROBLEMSAREUSUALLYIGNOREDINRESEARCHHYBRIDMECHANISMCOURSE,ANDTHERESEARCHRESULTSDONNOTALWAYSCOINCIDEWITHTHEPRACTICEENGINEERINGCONDITIONS911THEGEARDIFFERENTIALTRAINHASTWOFREEDOMS,ANDTHERATIOSOFTRANSMISSIONBETWEENARBITRARYTWOAXESAREACONSTANTINORDERTOSIMPLIFYTHEMECHANICALMODELANDMAKETHEPROBLEMSMUCHPROJECTED,THEDIFFERENTIALGEARTRAINISUSEDASTRANSMISSIONMECHANISMTOSTUDYTHEHYBRIDPROBLEMSOFTHEMECHANICALPRESSINTHISPAPERTHISPAPERADDRESSESTHERELATIONSHIPBETWEENTHEADJUSTABLESPEEDAMPLITUDEANDTHEPOWEROFTHETWOMOTORS,THEWORKINGLOADDISTRIBUTIONBETWEENTHETWOMOTORS,ANDPUTSFORWARDTWODRIVESCHEMESOFTHECONVENTIONALMOTORANDTHESERVOMOTORSIMULTANEOUSLYWORKING,ANDTWOMOTORSSEPARATELYWORKINGWITHTHE200TONMECHANICALPRESSASTHEENGINEERINGBACKGROUND,ADRIVESYSTEMOFTHEHYBRIDMECHANISMOFTHEMECHANICALPRESSISDESIGNED,ANDTHEFEASIBILITYOFTHETWODRIVESCHEMESINMECHANICALPRESSISANALYZED2THEPRINCIPLEOFTHEHYBRIDMECHANISMTHEWORKINGPRINCIPLEOFTHEHYBRIDMECHANISMOFTHEMECHANICALPRESSWITHDIFFERENTIALGEARTRAINISILLUSTRATEDINFIGURE1THESYSTEMCONSISTSOFCONVENTIONALMOTORALSOCALLEDACMACHINEWITHCONSTANTSPEED,SERVOMOTOR,REDUCINGUNITI,REDUCINGUNITII,DIFFERENTIALGEARTRAIN,ANDCRANKSLIDEMECHANISMTHEOUTPUTAXISOFTHEDIFFERENTIALGEARTRAINISCONNECTEDWITHTHECRANKSHAFTOFTHECRANKSLIDEMECHANISMONEOFTHETWOINPUTAXESLINKSTHECONVENTIONALMOTORTHROUGHTHEREDUCINGUNITІ;THEOTHERINPUTAXISLINKSTHESERVOMOTORTHROUGHTHEREDUCINGUNITIITHEREFOR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