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外文翻译热挤压模的压力分析和优化设计.pdf

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外文翻译热挤压模的压力分析和优化设计.pdf

TSINGHUASCIENCEANDTECHNOLOGYISSN1007021410/24PP290293VOLUME9,NUMBER3,JUNE2004STRESSANALYSISANDOPTIMUMDESIGNOFHOTEXTRUSIONDIESSHUAICIJUN帅词俊,XIAOGANG肖刚,NIZHENGSHUN倪正顺COLLEGEOFMECHANICALANDELECTRONICENGINEERING,CENTRALSOUTHUNIVERSITY,CHANGSHA410083,CHINAABSTRACTATHREEDIMENSIONALMODELOFAHOTEXTRUSIONDIEWASDEVELOPEDBYUSINGANSYSSOFTWAREANDITSSECONDDEVELOPMENTLANGUAGEANSYSPARAMETRICDESIGNLANGUAGEAFINITEELEMENTANALYSISANDOPTIMUMDESIGNWERECARRIEDOUTTHETHREEDIMENSIONALSTRESSDIAGRAMSHOWSTHATTHESTRESSCONCENTRATIONISRATHERSEVEREINTHEBRIDGEOFTHEHOTEXTRUSIONDIE,ANDTHATTHESTRESSDISTRIBUTIONISVERYUNEVENTHEOPTIMUMDIMENSIONSAREOBTAINEDTHERESULTSSHOWTHATTHEOPTIMUMHEIGHTOFTHEEXTRUSIONDIEIS89596MMTHEOPTIMUMRADIIOFDIFFLUENCEHOLESARE65048MMAND80065MMTHESTRESSCONCENTRATIONISREDUCEDBY27KEYWORDSTHREEDIMENSIONALMETHOD;MODELING;HOTEXTRUSIONDIE;OPTIMUMDESIGNINTRODUCTIONWITHTHESTANDARDOFLIVINGCONTINUOUSLYIMPROVING,ALUMINIUMPARTSAREWIDELYUSEDINEVERYWALKOFLIFEPRODUCTSAREBECOMINGMOREANDMOREDIVERSEANDCOMPLICATEDANDPRECISIONSAREHIGHERANDHIGHER1,2THEEXTRUSIONDIEISTHEBASISOFTHEEXTRUSIONPROCESSITNOTONLYDETERMINESPRODUCTSHAPE,SIZE,PRECISION,ANDSURFACESTATE,BUTALSOAFFECTSPRODUCTPERFORMANCESOTHEEXTRUSIONDIEISTHEKEYTOEXTRUSIONTECHNOLOGYSTUDIESTOIMPROVEEXTRUSIONDIEQUALITYANDPROLONGITSLIFESPANUSUALLYATTEMPTTOSIMPLIFY3DFINITEELEMENTMODELTO2D,BUTITISONLYRIGHTFORSIMPLESTRUCTURALSHAPESWITHOUTA3DFINITEELEMENTANALYSIS,THERESULTSCANNOTGIVEPRACTICALMANUFACTURINGHELPANDOFFERUSEFULINFORMATION35INTHISPAPER,ALUMINIUMPROFILEEXTRUSIONDIEWASMODELEDTOGETINOPTIMUMDESIGN681SOLIDMODELINGFIGURE1SHOWSTHEMALEDIEOFAHOTEXTRUSIONPLANARCOMBINEDDIEITSEXTERNALDIAMETERIS227000MM,ITSHEIGHTIS80000MMOTHERPARAMETERSARESHOWNINFIG1THEMODELINGMETHODISASFOLLOWS11COORDINATESOFP1ANDP5THECOORDINATESOFTHEPOINTOFINTERSECTIONBETWEENTHEBEELINELYKXBANDTHECIRCULARARCX2Y2R2ARE22221,5211KBKBKBRXK−−−11,51,5YKXB212COORDINATESOFP2ANDP6THECOORDINATESOFTHEINTERSECTIONPOINTP2BETWEENBEELINEL1YKXBANDBEELINEL2YS1ARE﹡RECEIVED20031210;SELECTEDFROMPROCEEDINGSOFTHESYMPOSIUMONFRONTIERSANDCHALLENGESOFMECHANICALSCIENCEANDTECHNOLOGYSUPPORTEDBYTHEFUNDFORTHEDOCTORALPROGRAMOFHIGHEREDUCATIONOFCHINANO20010533010﹡﹡TOWHOMCORRESPONDENCESHOULDBEADDRESSEDEMAILSHUAICIJUN163COM;TEL86731883685812SBXK−3Y2S14THECOORDINATESOFTHEINTERSECTIONPOINTP6BETWEENSHUAICIJUN帅词俊ETALSTRESSANALYSISANDOPTIMUMDESIGNOFHOTEXTRUSIONDIES291FIG1SKETCHMAPOFTHEHOTEXTRUSIONDIEBEELINEL3YKXBANDBEELINEL4YS1AREX6S25Y6KX2B613COORDINATESOFP3,P4,P7,ANDP8P3ANDP1ARESYMMETRICABOUTTHEYAXISP4ANDP2AREALSOSYMMETRICABOUTTHEYAXISP7ANDP5ARESYMMETRICABOUTTHEXAXISP8ANDP6AREALSOSYMMETRICABOUTTHEXAXIS14VARIABLESINTHEEQUATIONSINEQS16,FORPOINTSP1ANDP2,B2121KTK−ANDRR1FORPOINTSP5ANDP6,B2221KTK−ANDRR2R1,R2,T1,T2,S1,ANDS2ARETHECHANGERULEALONGTHEHEIGHTHOFTHEDIEEXPRESSEDASTHEFUNCTIONSR1F1Z,R2F2Z,T1F3Z,T2F4Z,S1F5Z,ANDS2F6Z,Z∈0,H15SECTIONSHAPEATSOMEHEIGHTWITHLINESLINKINGP1P4,P5P8,WITHCIRCULARARCFILLETINGATTHEPOINTOFINTERSECTIONP1P8,THESECTIONSHAPEATSOMEHEIGHTISOBTAINED16SECTIONSHAPEATEVERYHEIGHTHISDIVIDEDTOINTERFACIALNUMBERINUMEQUALPARTSINUMISDECIDEDBYTHEPRECISION,IFTHEINUMISHIGHER,THEPRECISIONISBETTERTHESECTIONSHAPEISDRAWNATEVERYHEIGHTASSHOWNINFIG2FIG2DIELINEDIAGRAM17SMOOTHCURVEDSURFACEUSINGSKINCOMMANDINANSYS,SMOOTHCURVEDSURFACESWEREBUILTALONGTHELINESTHEYARETHESURFACESOFTHEINFLUENCEHOLEUSINGTHEVAITGENERATESAVOLUMEBOUNDEDBYEXISTINGAREACOMMAND,ASOLIDWASCREATEDFROMTHOSESURFACES18SYMMETRYOFTHEDIETHEMAINBODYANDKERNELOFTHEDIEWEREDRAWNUSINGTHEBOOLEANOPERATIONSOFADD,SUBTRACT,ETCFIG3THESYMMETRYOFTHEDIEWASUSEDTOACCELERATETHECOMPUTATIONSUSINGA1/4SOLIDMODELFORTHEFINITEELEMENTANALYSISFIG42COMPUTINGMODELAPLANARDIETHATEXTRUDESTHEALUMINIUMALLOY6063ALMGSIWASUSEDASANEXAMPLETHELIQUIDOIDOFALIS657℃9,ANDTHEMELTTEMPERATUREOFALMG2SIIS558℃TAKINGTHEEXTRUSIONPRESSUREANDTHEPRODUCTSQUALITYINTOACCOUNT,THEWORKINGTEMPERATUREWAS292TSINGHUASCIENCEANDTECHNOLOGY,JUNE2004,93290–293DETERMINEDTOBE450℃THEDIEMATERIALIS4CR5MOSIV1H13BELOWTHE450℃,ITSYOUNGMODULUSANDPOSSIONRATIOARE210GPAAND025,RESPECTIVELYITSYIELDSTRENGTHIS1200MPATHEFRICTIONCOEFFICIENTIS03THESOLID923DSOLIDELEMENTWASUSEDTOCARRYTHROUGHTHEFREEMESHINORDERTOLOADTHEFRICTIONALFORCEWHILEEXTRUDING,THESURFACEEFFECTELEMENTSURF154WASUSEDTOPRODUCETHEREGULARQUADRANGLESFIG5FORTHE1600TEXTRUDER,THEEXTRUSIONINTENSITYWASCOMPUTEDUSINGEQ710THEVALUESARESHOWNINTABLE112ZZTDZZDPPPRTTTRTT′′′7FIG5FRICTIONALFORCELOADEDTABLE1INTENSITYOFEACHPARTINTHEDIEFIG3DIESOLIDMODELFIG4ONEQUARTEROFTHESOLIDMODELMPARZTZTTTDZR′ZT′DT′P83422741222721953191805323143861254THEBRIDGECOLLAPSEOFTENTAKESPLACEINTHEDIEANDITSSTRENGTHISDETERMINEDBYTHEHEIGHTANDTHEDISTRIBUTIONOFTHEDIFFLUENCEHOLESINTHISPAPER,THEHEIGHTHANDTHERADIIR1ANDR2OFTHEDIFFLUENCEHOLESWEREUSEDASDESIGNVARIABLESANDTHEMAXIMUMEQUIVALENTPRESSUREΣMAXWASUSEDASTHEGOALFUNCTIONTHEDESIGNVARIABLERANGESARELISTEDINTABLE2TABLE2DESIGNVARIABLERANGER1/MMR2/MMH/MMΘ1/˚Θ2/˚650008500080000980006000090000200004000020000400003COMPUTEDRESULTSFIGURE6ISTHEEQUIVALENTSTRESSDIAGRAMFROMFIG6WECANSEETHATTHESTRESSISLARGESTATTHEBRIDGE,ASEXPECTED24MAXIMUMEQUIVALENTSTRESSVALUESARELISTEDINTABLE3FROMLARGETOSMALLTHEDATASHOWSTHATTHENODALMAXIMUMEQUIVALENTSTRESSIS10665MPA,WHICHIS145HIGHERTHANTHESECONDONE9120MPA,ANDTHATTHESTRESSCONVERGENCEISVERYSEVEREINTHEBRIDGE,THISPARTISAPTTOPRODUCECRACKFIG6MAXIMUMEQUIVALENTSTRESSTABLE3NODESSTRESSVALUESNODECODE97152871969839507141156702727710723700ΣR/MPA1066591208327811680447953789977887758769076367635NODECODE7397087067317591778704747690743694696ΣR/MPA759375687559739873917360734371597064700370016956SHUAICIJUN帅词俊ETALSTRESSANALYSISANDOPTIMUMDESIGNOFHOTEXTRUSIONDIES293THEINITIALVALUEOFTHEDESIGNVARIABLESR1,R2,H,Θ1,ANDΘ2WERE75000MM,88000MM,80000MM,30000˚,AND30000˚,RESPECTIVELY,ANDTHEMAXIMUMEQUIVALENTSTRESSΣMAX10665MPAINTHE21ITERATIONS,THEOPTIMUMITERATIONWASTHEEIGHTEENTHTHEDESIGNVARIABLEVALUESWERER165048MM,R280065MM,H89596MM,Θ130642˚,Θ220045˚THEMAXIMUMEQUIVALENTSTRESSΣMAX7231MPA,WHICHIS27LESSTHEOPTIMUMRESULTSARESHOWNINTABLE4TABLE4OPTIMIZATIONPROCESSITERATIONTIMES1234567891011R1/MM7500081943773588085567249804416736565591651846517265067R2/MM8800088229952619047889535899839366182791937538060480153H/MM8000071640601008085489684743278140965297614788495588627Θ1/˚3000033847293822140032633360853181637644394743386134052Θ2/˚3000030751264062694623018367292126720325247402011320058ΣMAX/MPA1066511674132321229788251241788248668943975607497ITERATIONTIMES12131415161718192021R1/MM65048650476504865048650476504865048650436504265042R2/MM80070800639350683633849878007080065800458004480045H/MM65808851418811687945889788959889596898676684089839Θ1/˚30585324563541427786332312314430642302502755631341Θ2/˚23479222142004435941200462004520045200422004220042ΣMAX/MPA78007696760478807690795872317413821375134CONCLUSIONS1BASEDONANSYSSOFTWARE,ITSSECONDDEVELOPMENTLANGUAGEAPDLWASUSEDTODEVELOPA3DMODELOFTHEHOTEXTRUSIONDIETHATEXTRUDESALUMINIUMPROFILEHASBEENOBTAINED2THE3DSTRESSDISTRIBUTIONWASVERYUNEVEN,WITHSEVERESTRESSCONCENTRATIONSINTHEBRIDGEOFTHEHOTEXTRUSIONDIETHEOPTIMALGEOMETRICDESIGNHAD27LOWERMAXIMUMSTRESS,ABETTERDIEWILLNOTONLYREDUCEDIENUMBERBUTALSOREDUCETIMELOSTCHANGINGDIES,WHICHWILLGREATLYHEIGHTENPRODUCTIVITYREFERENCES1YINJIANHUASTRUCTURALADJUSTMENTORIENTATIONFORDOMESTICLARGESCALEDALUMINUMPROCESSINGENTERPRISESINTERMSOFIMPORTSITUATIONOFALUMINUMMATERIALINRECENTYEARSTHEWORLDNONFERROUSMETAL,2001,103742INCHINESE2LIYIFORECASTONDOMESTICALUMINUMMATERIALCONSUMPTIONANDADVICESONOPTIMIZINGDOMESTICALUMINUMMATERIALINDUSTRYCONSTITUTIONJOURNALOFSOUTHERNINSTITUTEOFMETALLURGY,2002,4305308INCHINESE3YIMIAO,LIUFANGTHECONTRIBUTINGFACTORSANALYSISABOUTTHELIFESPANOFTHEEXTRUSIONDIELIGHTALLOYPROCESSTECHNOLOGY,2000,283437INCHINESE4NIZHENGSHUN,SHUAICIJUN,ZHONGJUESOLIDMODELINGTECHNOLOGYANDITSAPPLICATIONINTHEEXTRUSIONDIEDESIGNBASEDONANSYSMECHANICALSCIENCEANDTECHNOLOGY,2003,221149150INCHINESE5KARACSGCOMPUTERAIDEDMETHODSFORDIEDESIGNPROCEEDINGSOFTHECONFERENCEONMECHANICALENGINEERING,1998,24634666MUELLERGDESIGNOPTIMIZATIONWITHTHEFINITEELEMENTPROGRAMANSYSINTERNATIONALJOURNALOFCOMPUTERAPPLICATIONSINTECHNOLOGY,1994,72712777CHENJINYI,CAIGUOZHONGTHECOMPUTERAIDEDENGINEERINGANALYSISANSYSUSERS’GUIDEBEIJINGCHINARAILWAYPRESS,2001INCHINESE8WANGGUOQIANGPRACTICALENGINEERINGDIGITALSIMULATIONTECHNOLOGYANDITSPRACTICEATANSYSSHANXIWESTNORTHINDUSTRIALUNIVERSITYPRESS,1999INCHINESE9ZHANGBAOCHANGNONFERROUSMETALANDITSHEATTREATMENTSHANXIWESTNORTHINDUSTRIALUNIVERSITYPRESS,1993INCHINESE10JIAXIA’NAN,HUJIUXIHOTEXTRUSIONTECHNICSANDDIEDESIGNBEIJINGCHINAMACHINEPRESS,1986INCHINESE

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