az31aa5083异种合金双层板气压胀形冷缩结合工艺研究word格式论文.docxVIP

az31aa5083异种合金双层板气压胀形冷缩结合工艺研究word格式论文.docx

  1. 1、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。。
  2. 2、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载
  3. 3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
  4. 4、该文档为VIP文档,如果想要下载,成为VIP会员后,下载免费。
  5. 5、成为VIP后,下载本文档将扣除1次下载权益。下载后,不支持退款、换文档。如有疑问请联系我们
  6. 6、成为VIP后,您将拥有八大权益,权益包括:VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
  7. 7、VIP文档为合作方或网友上传,每下载1次, 网站将根据用户上传文档的质量评分、类型等,对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档
查看更多
az31aa5083异种合金双层板气压胀形冷缩结合工艺研究word格式论文

AbstractThispaperexploredtheformingforacompositestructureofAZ31/AA5083 bilayercylinder.Thetemperaturerangeofmagnesiumalloyandaluminumalloyfor superplasticformingoverlapsandtheirthermalexpansioncoefficientsaredifferent.Thecylinderisformedbygasblowformingduringheatingandtheholdingforceof bilayercylinderis provided bycooling contractioncombination during cooling, whichachievestheconnectionofbilayer cylindricalcompositestructure.AfiniteelementanalysissoftwareMSC.MARCwithshellelementwasusedto simulatethesuperplasticformingprocessofbilayercylinder.Theresultsshowed thatthewallthicknessdistributionofcylindersisnonuniformandthethicknessof roundedcornersonthebottomisthethinnestandthislocationisthemost vulnerabletorupture.Wheninitialpressureandthemaximumpressureareconstant, theloadingpathsandthefrictioncoefficients betweendifferent sheets haveno effectonthewallthicknessdistribution.Thesmallerthefrictioncoefficient betweenthesheetandthemouldis,themoreuniformthe wallthicknessdistribution is.Theforcebetweentheinternalsheetandtheexternalsheetisequivalenttothe gaspressure,andtheequivalentvonmisesstressdistributionisconsistent.Experimentsforgasblowforming/coolingcontractioncombinationofbilayer cylinderwerecarriedoutunderthedifferenttemperatures and different loading pathswith1.0mmand1.5mmthickrolledsheet.Theresultsshowedthatifthe temperatureistoohigh,thebottomofinternalcylinderoccurinstability.Onthe contrary,thetemperureistoolow,thecornerradiusofcylinderbottomistoolarge.At450℃,thegaspressureincreased0.4MPaevery600sfrom1.6MPato4.4MPa,thenholding8100s,aperfectcylinderwith80mmindiameterand24mminheight wasformed,whichtheratioofheighttodiameteris0.3.Thenumericaland experimentalresultsofwallthicknessdistributionarefitwell,andthedifference betweencorrespondingthicknessthinningratioislessthan5%.Thesuitable forming temperature range for AZ31/AA5083 bilayer cylinders is 425~450℃,guided bytakingadvantageoftheplasticityoftwodissimilaralloys. Thelocationof sheetshasagreaterinfluenceonitsthicknes

您可能关注的文档

文档评论(0)

peili2018 + 关注
实名认证
文档贡献者

该用户很懒,什么也没介绍

1亿VIP精品文档

相关文档