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英文翻译材料(冷冲模)4.pdf

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Wear274–275(2012)355–367 ContentslistsavailableatSciVerseScienceDirect Wear journalhomepage:www.elsevier.com/locate/wear Wearatthedieradiusinsheetmetalstamping a,∗bc MichaelP.Pereira,WenyiYan,BernardF.Rolfe a CentreforMaterial&FibreInnovation,DeakinUniversity,Geelong,VIC3217,Australia b DepartmentofMechanical&AerospaceEngineering,MonashUniversity,Clayton,VIC3800,Australia c SchoolofEngineering,DeakinUniversity,Geelong,VIC3217,Australia articleinfoabstract Articlehistory:Insheetmetalstamping,itisknownthatwearisunevenlydistributedoverthedieradiusandthat Received3August2010 multiplewearmechanismsmayoccursimultaneously.However,therehasbeenlittleornoworkthat Receivedinrevisedform9October2011 detailsthetypesofwearmechanisms,andquantifiesthelocationsatwhichtheyoccur.Furthermore,the Accepted13October2011 linkbetweenrecentlyidentifiedtime-dependentcontactconditionsandthewearresponseiscurrently Availableonline20October2011 unknown.Anexperimentalstudyispresentedinthispapertoexaminethelocation,typeandseverityof wearthatoccursoverthedieradiusduringatypicalsheetmetalstampingprocess.Itisfoundthatthe Keywords: wearoverthedieradiusconsistsofacombinationofploughingandgallingmechanisms.Therelative Contactpressure Failureseverityoftheploughingmechanismisdividedintotwodistinctzonesonthedieradius,whichcorrelate Gallingwellwiththecontactpressureandslidingdistancebehaviorpredictedinourrecentlypublishednumer- Sheetmetalstampingicalstudy.Thegallingmechanismresultsinfailureofthestampingprocessandis,therefore,criticalto Toolweartheoveralltoolwearresponse.Ouranalysisindicatesthattheseverecontactpressure/smallslidingdis- tanceconditions,whichoccurduringtheinitialstageoftheprocess,causethegallingbehaviorobserved overtheradius.Therefore,itisconcludedthattheoveralltoolwearresponseandtoollifeisprimarily dependentontheinitialtransientstageofthestampingprocess. ©20