外文翻译--基于UG的减速器三维实体模型和运动仿真 英文版.pdf
内蒙古工业大学学报JOURNALOFINNERMONGOLIA第22卷第2期POLYTECHNICUNIVERSITYVol.22No.22003ÓcI|:1001-5167(2003)02-0153-04InnerMongoliaPolytechnicUniversityDepartmentofMechanicalEngineeringThe11thSino-PolishConferenceonCADinMachineryHuhhot,China,October2002ZHANGYeCollegeofMechanicalEngineering,InnerMongoliaPolytechnicUniversity,Huhhot,010062THREE-DIMENSIONALENTITYMODELANDMOVEMENTEMULATIONOFREDUCERBASEDONUGPLANEAbstract:Thisarticleintroducestomodelingforreducerwiththree-dimensionalentitybyMOSWLINGmoduleinthelatesteditionUGNXofUGsoftware,whichmainlyconcernwithmodelofthemaincomponentssuchasshaft,gear,gearshaft,mountandcoverandcompletecorrespondingassembly.Then,carryoutmovementemula-tionforalltheassemblywithMOTIONmodule.Keywords:UG;three-dimensionalentitymodel;reducer;emulationUGisthree-dimensionalentitymodelplanewhichintegratesCAD/CAM/CAE,andiscomputeraideddesign,analysisandmanufacturesoftwarewhichisusedwidelyintheworld.Thereareseveralproblemsshouldbepaidattentiontointhisarticle:involutestoothprofilemodelofgearteeth,hol-lowingoperationofcoverwhenmodeling,locationbetweengearshaftandgearwhenassembling.1PlottinginvolutestoothprofileofgearteethInvolutestoothprofileofgearteethcanbeplottedwith"expression"inUGq3r.Ontheotherhand,thisarticleprogramforinvolutestoothprofileofgearteethwithVC+6.0andsavecoordi-natevalueoftoothprofilesurfaceincorrespondingdatafile,andplotinvolutestoothprofileofgearteethusing"readpointfromfile"insplinewiththedefinedpoint.Polarcoordinatesparameterequationofinvolutesisq4rrk=rbcosnullknullk=invnullk=tgnullk-nullkmakerkandnullkgotoxk=rkccosnullkyk=rkcsinnullkandspreadwithtrigonometricexpressions,canget:xk=rbcqcos(nullk+nullk)+(nullk+nullk)csin(nullk+nullk)ryk=rbcqsin(nullk+nullk)-(nullk+nullk)ccos(nullk+nullk)rHererkisradiusofinvolutestoothprofileatKpoint,nullkisangleofinvolutesatAKsegment,rbisbaseradiusandnullkispressureangleatKpoint.Fig.1Fig.2ProgramwithVC+6.0andchange(nullk+nullk)from0to180,cangetcorrespondingxkandyk,andsavethemincorrespondingdatafilejkx.dat.TheresultslikeFig.1.Insert¹Curve¹SplineinUGmainmenu,click"ThroughPoints"buttonaftershowingdia-logue,thenthesystemshowdialogueSplineThroughPointslikeFig.2.Click"PointsFromFile"buttonandselectbefore-mentioneddatafilejkx.dat,cangetcorrespondinginvoluteslikeFig.3.Fig.3154=Îý<vÐÐ2003MBecausetooththicknessandtoothspacewidthofreferencecircleisequality,theoppositecenterangleofgearteethandtoothspaceisequality,thentheoppositecenterangleofhalftooththicknessis12c360¢2z,viz90¢z,herezisnumberofteeth.XCaxisshouldberotatednullk+90¢zandmaketheabovenullkexpressiongoto,corneristgnullk-nullk+90¢z.Becauseofthepressureangleofreferencecircleofstandardgearis20¢,soXCaxisshouldberotated(tg20¢-203.1415926/180¢)3.1415926180¢+90¢z.PlotalineatXCaxis,andselectthelineascenterofmirrorandmirrorinvoluteswith"ExistingLine"in"MirrorThroughaLine".Theradiusoftheanglebetweentoothprofilesurfaceandroofis=c*cm1-sinnulli,heremismodule,nulliisnominalpressureangle,c*isbottomclearancecoefficientq2r.Atlast,cangetthree-dimensionalentitymodelofgearwithtripping,corneringandstretching.likeFig.4.Fig.4Atthesamemethod,cangetgearteethinvolutestoothprofileofgearshaft.2SomeproblemsshouldbepaidattentiontowhenmodelingcoverHollowcoveraftercompletingthewholemodelofcover,cangetpartialentityandcantgettheperfectfullentity.Here,weuse"Region"in"Hollow"andchangecoverintotwoparts:bearingseat,protuberantlevelandboardingbodywhichisconnectwithmountisonepart,theotherisanotherpart,andhollowseparately.ThekeypointisthetwopartscannotUnitebeforehollowingandmustbeUnitedafterhollowing.Wethinkthecomplicatedbodyshouldbedisintegratedintosimplebodiesandbehollowedseparately,thenUnite.155»2ùZHANGYeThree-DimensionalEntityModelandMovementEmulationll3LocationofgearshaftandgearwhenassemblingAxiallocationbetweengearandgearshaftisnotconfirmedwhentheyareassembledonmount,sointerveningcanhappenamonggearteeth.ThereareeighttypesrestrictioninUGq1r,suchasMate,Align,Angle,Parallel,Perpendicular,Center,DistanceandTangent,buttheyallcannotsetupmatingrelationoftwogears.Therefore,itisnecessarytoplotcorrespondinglocationsurfaceduringthecourseofentitymodelofgearshaftandgears.Hereweplotcenterlineoftoothspaceofgearshaftandcenterlineofgearteethandthetwolinesshouldbekeptparalleleachotherduringthecourseofassembly,sotheinterveningamongteethcanbeavoided.Wekeeptheabovetwolinesseparatelypar-allelwithfringelinesofmountwithParallelrestrictionrelation,sothetwolinesmaybeparallelmore.Thereby,gearteethcannotinterveneduringthecourseofengagement.Wecompletethree-dimensionalentitymodelofthemaincomponentsofreducer.Then,wemakemovementemulationforit.First,establishmovementanalysiscase,andgearshaftandbearinginsidetrackislink1,andshaft,gear,fixed-distanceloopandcorrespondingbearinginsidetrackislink2.Then,setupJointformovementunit,namelysetupRevolutebetweengearshaftandgearseparate-ly.Atlast,setupCompound-Gearofrevolute1and2.SelectKinematic/DynamicAnalysisinAni-mation,andinputTimeandStep,wecanmakemovementemulationforreducer.Reference:1GuangliZhang,PengZhang,XueHong,UG18BASICTUTORIALBeijing:publishingcompanyofQinghuaUni-versity,2002.2RongtanFeng,ZhuyouTian.HOWTOCOMETRUEGEARPAIRTHREE-DIMENSIONALMODELM.JournalofBeijingmechanicaltechnicalcollege,15booknumber4(2000)3ChunxiangDai.EMULATIONFORENGAGEMENTOFINVOLUTESGEARWITHUGSOFTWARJ.Ein-corporationofmachineandelectricity2001.024XikaiHuang,WenweiZheng.MACHINEPRINCIPLE(No.6)publishingcompanyofhighereducation,1989¿UG¥hÎØ»L8î_张烨(=Îý<vÐÐý,=Ϋ+010062)K1:Óº¨UGÈq¥KÔñUGNX¥MOSWLINGvhÎÉØ»L8/,ö1,qàaaàa/Q8aQ8#M¥¥.KªUG¥MOTIONvÏ¥Éî_.1oM:UG;Ø»L8;hÎ;_ÏmsË|:TH164ÓDSM:A156=Îý<vÐÐ2003M