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1、附录引用的外文文献及其译文AstudyontheimprovementofformabilityforellipticaldeepdrawingprocessesD.H.Parka,*,S.S.Kanga,S.B.ParkbAbstractThepunchanddiecornerradii,thelubricantcondition,theworkingspeed,theblank-holdingforce,thefrictionforceandtheclearancechangetheformabilityofthedeepdrawingprocess.Ing
2、eneral,sheetmetalformingmayinvolvestretching,drawingorvariouscombinationsofthesebasicmodesofdeformation.Theinfluenceofthepunchanddiecornerradiiisofgreatimportanceinthedesignofsheetmetalworkingprocesses.Recently,mostoftheresearchforthesheetmetaldeepdrawingprocesshasbeenperformedonthef
3、ormabilityofanaxisymmetricshape,buttherearenotanyconcretereportsontheformabilityofanon-axisymmetricshape.Inaddition,theconventionalcornerradiiofthepunchanddiehavebeendeterminedbytrial-and-errorusingindustrialexperienceandpost-processingtests,andonlyapproximatecornerradiiofthepunchand
4、diehavebeenpresented.Inordertoobtaintheoptimalproductsinthedeepdrawingprocess,ellipticaldeepdrawingtestswerecarriedoutwithseveralcornerradiiofthepunchanddie.Inthisstudy,theoptimalcornerradiiofthepunchanddieinthedeepdrawingprocesswithanon-axisymmetricblankshapeareproposed.Researchhasb
5、eencarriedoutusingdiversetechnologiesincludingexperimentationandthefiniteelementmethod.C2001ElsevierScienceB.V.AllrightsreservedKeywords:Non-axisymmetricdeepdrawing;Punchcornerradius;Diecornerradius;Finiteelementmethod;Blankshape1.IntroductionManyresearchinvestigationsforcylindricalp
6、roductshavebeencarriedoutintothefundamentalsofthedeepdrawingprocess[1—4].Thus,thishasproducedmanyappliedshapessuchasrectangular,ellipticalandnon-axi-symmetrical.Ingeneral,mostoftheresearchforthedeepdrawingprocesshasbeenperformedontheformabilityofanaxisymmetricalshape,buttherearenoany
7、concretereportsontheformabilityofanellipticalshape[5—7].Fortheimprovementoftheformabilityofdeepdrawingprocess,thepunchanddiecornerradii,thelubricantcondition,theworkingspeed,theblank-holdingforce,thefrictionforceandtheclearanceareinfluential.Ingeneral,sheetmetalformingmayinvolvestret
8、ching,drawin
