会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

   首页 人人文库网 > 资源分类 > DOC文档下载

外文翻译--热挤压模具的优化设计.doc

  • 资源星级:
  • 资源大小:459.50KB   全文页数:11页
  • 资源格式: DOC        下载权限:注册会员
您还没有登陆,请先登录。登陆后即可下载此文档。
  合作网站登录: 微信快捷登录 支付宝快捷登录   QQ登录   微博登录
友情提示
2:本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3:本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

外文翻译--热挤压模具的优化设计.doc

1/11StressAnalysisandOptimumDesignofHotExtrusionDiesAbstractAthreedimensionalmodelofahotextrusiondiewasdevelopedbyusingANSYSsoftwareanditsseconddevelopmentlanguageANSYSparametricdesignlanguage.Afiniteelementanalysisandoptimumdesignwerecarriedout.Thethreedimensionalstressdiagramshowsthatthestressconcentrationisrathersevereinthebridgeofthehotextrusiondie,andthatthestressdistributionisveryuneven.Theoptimumdimensionsareobtained.Theresultsshowthattheoptimumheightoftheextrusiondieis89.596mm.Theoptimumradiiofdiffluenceholesare65.048mmand80.065mm.Thestressconcentrationisreducedby27.KeywordsthreedimensionalmethodmodelinghotextrusiondieoptimumdesignIntroductionWiththecontinuousimprovementoflivingstandards,betterthermalconductivityofaluminumalloyprofiles.Aluminumcomponentswidelyusedineveryaspectoflife.Therefore,thealuminumalloyextrusionprofiles,profilesofvarioustypesofradiatorshavebeenwidelyusedinelectricalappliances,machinery,andotherindustries.Variableproductsandthegrowingdiversityandcomplexityofhighprecision,theextrusionprocessisthebasisforextrusiondie.Itnotonlydeterminestheshape,size,accuracyandsurfacestate,butalsoaffecttheperformanceoftheproduct.Soextrusiondieextrusiontechnologyisthekey.Studiestoimproveextrusiondiequalityandprolongitslifespanusuallyattempttosimplify3Dfiniteelementmodelto2D,butitisonlyrightforsimplestructuralshapes.Withouta3Dfiniteelementanalysis,theresultscannotgivepracticalmanufacturinghelpandofferusefulinformation35.Inthispaper,aluminiumprofileextrusiondiewasmodeledtogetinoptimumdesign68.1SolidModelingFigure1showsthemaledieofahotextrusionplanarcombineddie.Itsexternaldiameteris227.000mm,itsheightis80.000mm.OtherparametersareshowninFig.1.Themodelingmethodisasfollows.1.1CoordinatesofP1andP5ThecoordinatesofthepointofintersectionbetweenthebeelineLykxbandthecirculararcx2y2R2are1.2CoordinatesofP2andP6ThecoordinatesoftheintersectionpointP2betweenbeelineL1ykxband2/11beelineL2yS1areThecoordinatesoftheintersectionpointP6betweenbeelineL3ykxbandbeelineL4yS1are1.3CoordinatesofP3,P4,P7,andP8P3andP1aresymmetricabouttheyaxis.P4andP2arealsosymmetricabouttheyaxis.P7andP5aresymmetricaboutthexaxis.P8andP6arealsosymmetricaboutthexaxis.1.4VariablesintheequationsInEqs.16,forpointsP1andP2,andRR1.ForpointsP5andP6,andRR2.R1,R2,T1,T2,S1,andS2arethechangerulealongtheheightHofthedieexpressedasthefunctionsR1f1z,R2f2z,T1f3z,T2f4z,S1f5z,andS2f6z,z€0,H.1.5SectionshapeatsomeheightWithlineslinkingP1P4,P5P8,withcirculararcfilletingatthepointofintersectionP1P8,thesectionshapeatsomeheightisobtained.1.6SectionshapeateveryheightHisdividedtointerfacialnumberINUMequalpartsINUMisdecidedbytheprecision,iftheINUMishigher,theprecisionisbetter.ThesectionshapeisdrawnateveryheightasshowninFig.2.3/111.7SmoothcurvedsurfaceUsingSKINcommandinANSYS,smoothcurvedsurfaceswerebuiltalongthelines.Theyarethesurfacesoftheinfluencehole.UsingtheVAitgeneratesavolumeboundedbyexistingareacommand,asolidwascreatedfromthosesurfaces.1.8SymmetryofthedieThemainbodyandkernelofthedieweredrawnusingtheBooleanoperationsofadd,subtract,etc.Fig.3.Thesymmetryofthediewasusedtoacceleratethecomputationsusinga1/4solidmodelforthefiniteelementanalysisFig.4.2ComputingModelAplanardiethatextrudesthealuminiumalloy6063AlMgSiwasusedasanexample.TheliquidoidofAlis657℃9,andthemelttemperatureofAlMg2Siis558℃.Takingtheextrusionpressureandtheproductsqualityintoaccount,theworkingtemperaturewasdeterminedtobe450℃.Thediematerialis4Cr5MoSiV1H13.Belowthe450℃,itsYoungmodulusandPossionratioare210GPaand0.25,respectively.Itsyieldstrengthis1200MPa.Thefrictioncoefficientis0.3.TheSolid923Dsolidelementwasusedtocarrythroughthefreemesh.Inordertoloadthefrictionalforcewhileextruding,thesurfaceeffectelementSurf154wasusedtoproducetheregularquadranglesFig.5.Forthe1600t4/11extruder,theextrusionintensitywascomputedusingEq.710.ThevaluesareshowninTable1.Thebridgecollapseoftentakesplaceinthedie.Anditsstrengthisdeterminedbytheheightandthedistributionofthediffluenceholes.Inthispaper,theheightHandtheradiiR1andR2ofthediffluenceholeswereusedasdesignvariablesandthemaximumequivalentpressuresmaxwasusedasthegoalfunction.ThedesignvariablerangesarelistedinTable2.3ComputedResultsFigure6istheequivalentstressdiagram.FromFig.6wecanseethatthestressislargestatthebridge,asexpected24maximumequivalentstressvaluesarelistedinTable3fromlargetosmall.Thedatashowsthatthenodalmaximumequivalentstressis1066.5MPa,whichis14.5higherthanthesecondone912.0MPa,andthatthestressconvergenceisverysevereinthebridge,thispartisapttoproducecrack.

注意事项

本文(外文翻译--热挤压模具的优化设计.doc)为本站会员(英文资料库)主动上传,人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知人人文库网([email protected]),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5