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1、JournalofMaterialsProcessingTechnology162163(2005)512518StudyofworkrolledgecontactinasymmetricalrollingbymodifiedinfluencefunctionmethodZ.Y.Jiang∗,H.T.Zhu,A.K.TieuSchoolofMechanical,MaterialsandMechatronicEngineering,UniversityofWollongong,WollongongNSW2522,AustraliaAbstractWorkrolledgecontactaffect
2、smechanicsofasymmetricalrollingandcrownoftherolledstripsignificantly,whichhasnotbeenquantifiedbefore.Inthispaper,amodifiedinfluencefunctionmethodmodelhasbeendevelopedbasedonthedeformationcompatibilitybetweenthebackuprollandworkroll,theworkrollandstripandthetwoworkrollswhentheworkrollspeedsoftheupperan
3、dlowerworkrollaredifferent.Therollingforce,intermediateforce,rolledgecontactforceandtheedgecontactlengthforasymmetricalrollingofstriparefocused.Thecalculatedrollingforce,crownoftherolledstripandtheedgecontactlengtharecomparedforvariousrollingconditions.Theeffectsofreductionandfrictiononcrownofther
4、olledstriparealsodiscussed.©2005ElsevierB.V.Allrightsreserved.Keywords:Rolledgecontact;Asymmetricalrolling;Modifiedinfluencefunctionmethod;Crown1.Introductioninthinstriprolling.Zhang[12]investigatedthemechanicsofcoldrollingofthinfoil.Flecketal.[13]studiedthecoldIngeneral,thinstripisproducedonatandem
5、coldmillrollingoffoilbyslabmethodwithconstantfriction.Jiangwhereworkrollsareflattened[1]toanon-circulardeformedandcoworkers[1416]calculatedtheelasticdeformationofshape[2].Thisstriphasawideapplication,especiallyinthethinstrip,itsshape,profileandflatness.Elasticdeformationelectronicandinstrumentindustr
6、ies.Asymmetricalrollingoftherollsbringsaboutproblemsofprofile,shapeandflat-(seeFig.1a)withworkrollspeeddifferencewillresultinness[15].Asolutiononhowtoimprovethestripshapeandadecreaseof3040%rollingforceandtorque[3],anditflatness,anddimensionalaccuracyhasalwaysbeenofmajorcanalsoreducethicknesssignifican
7、tlyincoldrollingofstripinteresttothesteelmanufacturersandresearchers.Theseare[47].Therearetwowaysusedtoconstructtheasymmetri-rollingprocesseswheretheworkrollsdonotcontacteachcalrollingprocess.Oneistousethesamedia
