欢迎来到人人文库网! | 帮助中心 人人文库renrendoc.com美如初恋!
人人文库网
首页 人人文库网 > 资源分类 > PDF文档下载

外文翻译--单浇口注塑模具的优化 英文版.pdf

  • 资源大小:1.53MB        全文页数:7页
  • 资源格式: PDF        下载权限:游客/注册会员/VIP会员    下载费用:5
游客快捷下载 游客一键下载
会员登录下载
下载资源需要5

邮箱/手机号:
您支付成功后,系统会自动为您创建此邮箱/手机号的账号,密码跟您输入的邮箱/手机号一致,以方便您下次登录下载和查看订单。注:支付完成后需要自己下载文件,并不会自动发送文件哦!

支付方式: 微信支付    支付宝   
验证码:   换一换

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--单浇口注塑模具的优化 英文版.pdf

LIETAL/JZHEJIANGUNIVSCIA200787107710831077SINGLEGATEOPTIMIZATIONFORPLASTICINJECTIONMOLDLIJIQUAN†,LIDEQUN,GUOZHIYING,LVHAIYUANDEPARTMENTOFPLASTICITYTECHNOLOGY,SHANGHAIJIAOTONGUNIVERSITY,SHANGHAI200030,CHINA†EMAILHUTLI163COMRECEIVEDNOV22,2006;REVISIONACCEPTEDMAR19,2007ABSTRACTTHISPAPERDEALSWITHAMETHODOLOGYFORSINGLEGATELOCATIONOPTIMIZATIONFORPLASTICINJECTIONMOLDTHEOBJECTIVEOFTHEGATEOPTIMIZATIONISTOMINIMIZETHEWARPAGEOFINJECTIONMOLDEDPARTS,BECAUSEWARPAGEISACRUCIALQUALITYISSUEFORMOSTINJECTIONMOLDEDPARTSWHILEITISINFLUENCEDGREATLYBYTHEGATELOCATIONFEATUREWARPAGEISDEFINEDASTHERATIOOFMAXIMUMDISPLACEMENTONTHEFEATURESURFACETOTHEPROJECTEDLENGTHOFTHEFEATURESURFACETODESCRIBEPARTWARPAGETHEOPTIMIZATIONISCOMBINEDWITHTHENUMERICALSIMULATIONTECHNOLOGYTOFINDTHEOPTIMALGATELOCATION,INWHICHTHESIMULATEDANNEALINGALGORITHMISUSEDTOSEARCHFORTHEOPTIMUMFINALLY,ANEXAMPLEISDISCUSSEDINTHEPAPERANDITCANBECONCLUDEDTHATTHEPROPOSEDMETHODISEFFECTIVEKEYWORDSINJECTIONMOLD,GATELOCATION,OPTIMIZATION,FEATUREWARPAGEDOI101631/JZUS2007A1077DOCUMENTCODEACLCNUMBERTQ32066INTRODUCTIONPLASTICINJECTIONMOLDINGISAWIDELYUSED,COMPLEXBUTHIGHLYEFFICIENTTECHNIQUEFORPRODUCINGALARGEVARIETYOFPLASTICPRODUCTS,PARTICULARLYTHOSEWITHHIGHPRODUCTIONREQUIREMENT,TIGHTTOLERANCE,ANDCOMPLEXSHAPESTHEQUALITYOFINJECTIONMOLDEDPARTSISAFUNCTIONOFPLASTICMATERIAL,PARTGEOMETRY,MOLDSTRUCTUREANDPROCESSCONDITIONSTHEMOSTIMPORTANTPARTOFANINJECTIONMOLDBASICALLYISTHEFOLLOWINGTHREESETSOFCOMPONENTSCAVITIES,GATESANDRUNNERS,ANDCOOLINGSYSTEMLAMANDSEOW2000ANDJINANDLAM2002ACHIEVEDCAVITYBALANCINGBYVARYINGTHEWALLTHICKNESSOFTHEPARTABALANCEFILLINGPROCESSWITHINTHECAVITYGIVESANEVENLYDISTRIBUTEDPRESSUREANDTEMPERATUREWHICHCANDRASTICALLYREDUCETHEWARPAGEOFTHEPARTBUTTHECAVITYBALANCINGISONLYONEOFTHEIMPORTANTINFLUENCINGFACTORSOFPARTQUALITIESESPECIALLY,THEPARTHASITSFUNCTIONALREQUIREMENTS,ANDITSTHICKNESSESSHOULDNOTBEVARIEDUSUALLYFROMTHEPOINTVIEWOFTHEINJECTIONMOLDDESIGN,AGATEISCHARACTERIZEDBYITSSIZEANDLOCATION,ANDTHERUNNERSYSTEMBYTHESIZEANDLAYOUTTHEGATESIZEANDRUNNERLAYOUTAREUSUALLYDETERMINEDASCONSTANTSRELATIVELY,GATELOCATIONSANDRUNNERSIZESAREMOREFLEXIBLE,WHICHCANBEVARIEDTOINFLUENCETHEQUALITYOFTHEPARTASARESULT,THEYAREOFTENTHEDESIGNPARAMETERSFOROPTIMIZATIONLEEANDKIM1996AOPTIMIZEDTHESIZESOFRUNNERSANDGATESTOBALANCERUNNERSYSTEMFORMULTIPLEINJECTIONCAVITIESTHERUNNERBALANCINGWASDESCRIBEDASTHEDIFFERENCESOFENTRANCEPRESSURESFORAMULTICAVITYMOLDWITHIDENTICALCAVITIES,ANDASDIFFERENCESOFPRESSURESATTHEENDOFTHEMELTFLOWPATHINEACHCAVITYFORAFAMILYMOLDWITHDIFFERENTCAVITYVOLUMESANDGEOMETRIESTHEMETHODOLOGYHASSHOWNUNIFORMPRESSUREDISTRIBUTIONSAMONGTHECAVITIESDURINGTHEENTIREMOLDINGCYCLEOFMULTIPLECAVITIESMOLDZHAIETAL2005APRESENTEDTHETWOGATELOCATIONOPTIMIZATIONOFONEMOLDINGCAVITYBYANEFFICIENTSEARCHMETHODBASEDONPRESSUREGRADIENTPGSS,ANDSUBSEQUENTLYPOSITIONEDWELDLINESTOTHEDESIREDLOCATIONSBYVARYINGRUNNERSIZESFORJOURNALOFZHEJIANGUNIVERSITYSCIENCEAISSN1673565XPRINT;ISSN18621775ONLINEWWWZJUEDUCN/JZUS;WWWSPRINGERLINKCOMEMAILJZUSZJUEDUCNPROJECTNO50675080SUPPORTEDBYTHENATIONALNATURALSCIENCEFOUNDATIONOFCHINALIETAL/JZHEJIANGUNIVSCIA200787107710831078MULTIGATEPARTSZHAIETAL,2006ASLARGEVOLUMEPART,MULTIPLEGATESARENEEDEDTOSHORTENTHEMAXIMUMFLOWPATH,WITHACORRESPONDINGDECREASEININJECTIONPRESSURETHEMETHODISPROMISINGFORDESIGNOFGATESANDRUNNERSFORASINGLECAVITYWITHMULTIPLEGATESMANYOFINJECTIONMOLDEDPARTSAREPRODUCEDWITHONEGATE,WHETHERINSINGLECAVITYMOLDORINMULTIPLECAVITIESMOLDTHEREFORE,THEGATELOCATIONOFASINGLEGATEISTHEMOSTCOMMONDESIGNPARAMETERFOROPTIMIZATIONASHAPEANALYSISAPPROACHWASPRESENTEDBYCOURBEBAISSEANDGARCIA2002,BYWHICHTHEBESTGATELOCATIONOFINJECTIONMOLDINGWASESTIMATEDSUBSEQUENTLY,THEYDEVELOPEDTHISMETHODOLOGYFURTHERANDAPPLIEDITTOSINGLEGATELOCATIONOPTIMIZATIONOFANLSHAPEEXAMPLECOURBEBAISSE,2005ITISEASYTOUSEANDNOTTIMECONSUMING,WHILEITONLYSERVESTHETURNINGOFSIMPLEFLATPARTSWITHUNIFORMTHICKNESSPANDELIDISANDZOU1990PRESENTEDTHEOPTIMIZATIONOFGATELOCATION,BYINDIRECTQUALITYMEASURESRELEVANTTOWARPAGEANDMATERIALDEGRADATION,WHICHISREPRESENTEDASWEIGHTEDSUMOFATEMPERATUREDIFFERENTIALTERM,ANOVERPACKTERM,ANDAFRICTIONALOVERHEATINGTERMWARPAGEISINFLUENCEDBYTHEABOVEFACTORS,BUTTHERELATIONSHIPBETWEENTHEMISNOTCLEARTHEREFORE,THEOPTIMIZATIONEFFECTISRESTRICTEDBYTHEDETERMINATIONOFTHEWEIGHTINGFACTORSLEEANDKIM1996BDEVELOPEDANAUTOMATEDSELECTIONMETHODOFGATELOCATION,INWHICHASETOFINITIALGATELOCATIONSWEREPROPOSEDBYADESIGNERANDTHENTHEOPTIMALGATEWASLOCATEDBYTHEADJACENTNODEEVALUATIONMETHODTHECONCLUSIONTOAGREATEXTENTDEPENDSMUCHONTHEHUMANDESIGNER’SINTUITION,BECAUSETHEFIRSTSTEPOFTHEMETHODISBASEDONTHEDESIGNER’SPROPOSITIONSOTHERESULTISTOALARGEEXTENTLIMITEDTOTHEDESIGNER’SEXPERIENCELAMANDJIN2001DEVELOPEDAGATELOCATIONOPTIMIZATIONMETHODBASEDONTHEMINIMIZATIONOFTHESTANDARDDEVIATIONOFFLOWPATHLENGTHSDLANDSTANDARDDEVIATIONOFFILLINGTIMESDTDURINGTHEMOLDINGFILLINGPROCESSSUBSEQUENTLY,SHENETAL2004A;2004BOPTIMIZEDTHEGATELOCATIONDESIGNBYMINIMIZINGTHEWEIGHTEDSUMOFFILLINGPRESSURE,FILLINGTIMEDIFFERENCEBETWEENDIFFERENTFLOWPATHS,TEMPERATUREDIFFERENCE,ANDOVERPACKPERCENTAGEZHAIETAL2005BINVESTIGATEDOPTIMALGATELOCATIONWITHEVALUATIONCRITERIAOFINJECTIONPRESSUREATTHEENDOFFILLINGTHESERESEARCHERSPRESENTEDTHEOBJECTIVEFUNCTIONSASPERFORMANCESOFINJECTIONMOLDINGFILLINGOPERATION,WHICHARECORRELATEDWITHPRODUCTQUALITIESBUTTHECORRELATIONBETWEENTHEPERFORMANCESANDQUALITIESISVERYCOMPLICATEDANDNOCLEARRELATIONSHIPHASBEENOBSERVEDBETWEENTHEMYETITISALSODIFFICULTTOSELECTAPPROPRIATEWEIGHTINGFACTORSFOREACHTERMANEWOBJECTIVEFUNCTIONISPRESENTEDHERETOEVALUATETHEWARPAGEOFINJECTIONMOLDEDPARTSTOOPTIMIZEGATELOCATIONTOMEASUREPARTQUALITYDIRECTLY,THISINVESTIGATIONDEFINESFEATUREWARPAGETOEVALUATEPARTWARPAGE,WHICHISEVALUATEDFROMTHE“FLOWPLUSWARPAGE”SIMULATIONOUTPUTSOFMOLDFLOWPLASTICSINSIGHTMPISOFTWARETHEOBJECTIVEFUNCTIONISMINIMIZEDTOACHIEVEMINIMUMDEFORMATIONINGATELOCATIONOPTIMIZATIONSIMULATEDANNEALINGALGORITHMISEMPLOYEDTOSEARCHFORTHEOPTIMALGATELOCATIONANEXAMPLEISGIVENTOILLUSTRATETHEEFFECTIVITYOFTHEPROPOSEDOPTIMIZATIONPROCEDUREQUALITYMEASURESFEATUREWARPGEDEFINITIONOFFEATUREWARPAGETOAPPLYOPTIMIZATIONTHEORYTOTHEGATEDESIGN,QUALITYMEASURESOFTHEPARTMUSTBESPECIFIEDINTHEFIRSTINSTANCETHETERM“QUALITY”MAYBEREFERREDTOMANYPRODUCTPROPERTIES,SUCHASMECHANICAL,THERMAL,ELECTRICAL,OPTICAL,ERGONOMICALORGEOMETRICALPROPERTIESTHEREARETWOTYPESOFPARTQUALITYMEASURESDIRECTANDINDIRECTAMODELTHATPREDICTSTHEPROPERTIESFROMNUMERICALSIMULATIONRESULTSWOULDBECHARACTERIZEDASADIRECTQUALITYMEASUREINCONTRAST,ANINDIRECTMEASUREOFPARTQUALITYISCORRELATEDWITHTARGETQUALITY,BUTITCANNOTPROVIDEADIRECTESTIMATEOFTHATQUALITYFORWARPAGE,THEINDIRECTQUALITYMEASURESINRELATEDWORKSAREONEOFPERFORMANCESOFINJECTIONMOLDINGFLOWINGBEHAVIORORWEIGHTEDSUMOFTHOSETHEPERFORMANCESAREPRESENTEDASFILLINGTIMEDIFFERENTIALALONGDIFFERENTFLOWPATHS,TEMPERATUREDIFFERENTIAL,OVERPACKPERCENTAGE,ANDSOONITISOBVIOUSTHATWARPAGEISINFLUENCEDBYTHESEPERFORMANCES,BUTTHERELATIONSHIPBETWEENWARPAGEANDTHESEPERFORMANCESISNOTCLEARANDTHEDETERMINATIONOFTHESEWEIGHTINGFACTORSISRATHERDIFFICULTTHEREFORE,THEOPTIMIZATIONWITHTHEABOVEOBJECTIVEFUNCTIONLIETAL/JZHEJIANGUNIVSCIA200787107710831079PROBABLYWILLNOTMINIMIZEPARTWARPAGEEVENWITHPERFECTOPTIMIZATIONTECHNIQUESOMETIMES,IMPROPERWEIGHTINGFACTORSWILLRESULTINABSOLUTELYWRONGRESULTSSOMESTATISTICALQUANTITIESCALCULATEDFROMTHENODALDISPLACEMENTSWERECHARACTERIZEDASDIRECTQUALITYMEASURESTOACHIEVEMINIMUMDEFORMATIONINRELATEDOPTIMIZATIONSTUDIESTHESTATISTICALQUANTITIESAREUSUALLYAMAXIMUMNODALDISPLACEMENT,ANAVERAGEOFTOP10PERCENTILENODALDISPLACEMENTS,ANDANOVERALLAVERAGENODALDISPLACEMENTLEEANDKIM,1995;1996BTHESENODALDISPLACEMENTSAREEASYTOOBTAINFROMTHESIMULATIONRESULTS,THESTATISTICALVALUES,TOSOMEEXTENTS,REPRESENTINGTHEDEFORMATIONBUTTHESTATISTICALDISPLACEMENTCANNOTEFFECTIVELYDESCRIBETHEDEFORMATIONOFTHEINJECTIONMOLDEDPARTSININDUSTRY,DESIGNERSANDMANUFACTURERSUSUALLYPAYMOREATTENTIONTOTHEDEGREEOFPARTWARPAGEONSOMESPECIFICFEATURESTHANTHEWHOLEDEFORMATIONOFTHEINJECTIONMOLDEDPARTSINTHISSTUDY,FEATUREWARPAGEISDEFINEDTODESCRIBETHEDEFORMATIONOFTHEINJECTIONPARTSTHEFEATUREWARPAGEISTHERATIOOFTHEMAXIMUMDISPLACEMENTOFTHEFEATURESURFACETOTHEPROJECTEDLENGTHOFTHEFEATURESURFACEFIG1100,HLΓ1WHEREΓISTHEFEATUREWARPAGE,HISTHEMAXIMUMDISPLACEMENTONTHEFEATURESURFACEDEVIATINGFROMTHEREFERENCEPLATFORM,ANDLISTHEPROJECTEDLENGTHOFTHEFEATURESURFACEONAREFERENCEDIRECTIONPARALLELINGTHEREFERENCEPLATFORMFORCOMPLICATEDFEATURESONLYPLANEFEATUREDISCUSSEDHERE,THEFEATUREWARPAGEISUSUALLYSEPARATEDINTOTWOCONSTITUENTSONTHEREFERENCEPLANE,WHICHAREREPRESENTEDONA2DCOORDINATESYSTEM100,100,XYHHLLΓΓ2WHEREΓX,ΓYARETHECONSTITUENTFEATUREWARPAGESINTHEX,YDIRECTION,ANDLX,LYARETHEPROJECTEDLENGTHSOFTHEFEATURESURFACEONX,YCOMPONENTEVALUATIONOFFEATUREWARPAGEAFTERTHEDETERMINATIONOFTARGETFEATURECOMBINEDWITHCORRESPONDINGREFERENCEPLANEANDPROJECTIONDIRECTION,THEVALUEOFLCANBECALCULATEDIMMEDIATELYFROMTHEPARTWITHTHECALCULATINGMETHODOFANALYTICGEOMETRYFIG2LISACONSTANTFORANYPARTONTHESPECIFIEDFEATURESURFACEANDPROJECTEDDIRECTIONBUTTHEEVALUATIONOFHISMORECOMPLICATEDTHANTHATOFLSIMULATIONOFINJECTIONMOLDINGPROCESSISACOMMONTECHNIQUETOFORECASTTHEQUALITYOFPARTDESIGN,MOLDDESIGNANDPROCESSSETTINGSTHERESULTSOFWARPAGESIMULATIONAREEXPRESSEDASTHENODALDEFLECTIONSONX,Y,ZCOMPONENTWX,WY,WZ,ANDTHENODALDISPLACEMENTWWISTHEVECTORLENGTHOFVECTORSUMOFWXI,WYJ,ANDWZK,WHEREI,J,KARETHEUNITVECTORSONX,Y,ZCOMPONENTTHEHISTHEMAXIMUMDISPLACEMENTOFTHENODESONTHEFEATURESURFACE,WHICHISCORRELATEDWITHTHENORMALORIENTATIONOFTHEREFERENCEPLANE,ANDCANBEDERIVEDFROMTHERESULTSOFWARPAGESIMULATIONTOCALCULATEH,THEDEFLECTIONOFITHNODEISEVALUATEDFIRSTLYASFOLLOWSCOSCOSCOS,IIXIYIZIAAIBBWWWWWWΑΒΓΩΩ−3WHEREWIISTHEDEFLECTIONINTHENORMALDIRECTIONOFTHEREFERENCEPLANEOFITHNODE;WIX,WIY,WIZARETHEDEFLECTIONSONX,Y,ZCOMPONENTOFITHNODE;Α,Β,ΓARETHEANGLESOFNORMALVECTOROFTHEREFERENCE;AANDBARETHETERMINALNODESOFTHEFEATURETOPROJECTINGDIRECTIONFIG2;WAANDWBARETHEDEFLECTIONSOFNODESAANDBFIG1THEDEFINITIONOFFEATUREWARPAGEHREFERENCEPLANESURFACELFIG2THEPROJECTEDLENGTHEVALUATIONFEATUREYXLXBALYLIETAL/JZHEJIANGUNIVSCIA200787107710831080COSCOSCOS,COSCOSCOS,AAXAYAZBBXBYBZWWWWWWWWΑΒΓΑΒΓ4WHEREWAX,WAY,WAZARETHEDEFLECTIONSONX,Y,ZCOMPONENTOFNODEA;WBX,WBYANDWBZARETHEDEFLECTIONSONX,Y,ZCOMPONENTOFNODEB;ΩIAANDΩIBARETHEWEIGHTINGFACTORSOFTHETERM

注意事项

本文(外文翻译--单浇口注塑模具的优化 英文版.pdf)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(发送邮件至[email protected]或直接QQ联系客服),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。

关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

[email protected] 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

经营许可证编号:苏ICP备12009002号-5