无芯模旋压旋轮轨迹曲线对其成形精度影响的仿真研究.pdf

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1、432Lie{al／JZhejiangUniv-SciA(ApplPhys＆Eng)201415(6)：432—446JournalofZhejiangUniversity—SCIENCEA(AppliedPhysics&Engineering)ISSN1673-565X(Print)；ISSN1862-1775(Online)W3NW．zjueducn~zus；www．spdngerlinkcomE-mail：jZUS@zju．edu．crtAnumericalstudyoftheectsofrollerpathsondimensional

2、preci一sioni。ndI1ie-lessspDiInnilngofshIieetmetal“YongLI"，JinWANG十{l，Guo—dongLU，Guo-junPAN。1TheStateKeyLabofFluidPowerTransmissionandControl,ZhejiangUniversity,Hangzhou310027,China)CSchoolofinformationandEngineering,ZhejiangRadio＆TelevisionUniversity,tIangzhou31002ZChina)E-m

3、ail：liyong332@~u．edu．cn；dwjcom@zju．edu．cnReceivedDec．23，2013；RevisionacceptedMay6，2014；CrosscheckedMay21，2014Abstract：Die—lessspinningeliminatesthedependenceuponthemandreloftraditionalspinning，butbringingaboutcompara—tivelYpoordimensionalaccuracywhichneedstobeimproved．Inthi

4、spaper,rollerpathsinthefirstpassofdie—lessspinning，includingconcave，convex，linearandcombinedonesareparameterizedaccordingtothedegreeofbendingandtheirefectsondimensiona1precision(thicknessvariationandshapedeviation)havebeenstudiedbyusingexperimentsoffiniteelementfFE1analysis

5、．Theeffectsofrollerpathsonthicknessvariation，shapedeviation，toolforces，andstressandstrainvariationshavebeenanalyzednumerically．Theresultsshowedthatforconcaverollerpaths，thethicknessvariationisnotverysensitivetothedegreeofbending，whilealowdegreeofbendingoftherollerpathcanres

6、ultinalowshapedeviation．Forconvexrollerpaths，alowdegreeofbendingleadstobothlowthicknessreductionand1owshapedeviation．Furtherresearchshowsthatacombinedrollerpathwithconvex—concavecurvecouldcontributealowshapedeviation，whileaninversecombinedrollerpathgivesbeRerthicknessprecis

7、ion．Keywords：Sheetmetal，Die-lessspinning，Rollerpaths，Dimensionalprecision，Toolforcesdoi：10．1631／jzus．A1300405Documentcode：ACLCnumber：TG306；TH162+．11lntroductionturingcanbeachieved．buttodosoalsoIimitstheapplicationoftraditionalmetalspinningbecauseofSheetmetalspinningisatradi

8、tionalformingthecostofthemandrelandthelimitationtoaxiallyprocessforaxiallysymmetri