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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.Ingeneral,s
2、heetmetalformingmayinvolvestretching,drawingorvariouscombinationsofthesebasicmodesofdeformation.Theinfluenceofthepunchanddiecornerradiiisofgreatimportanceinthedesignofsheetmetalworkingprocesses.Recently,mostoftheresearchforthesheetmetaldeepdrawingprocesshasbeenperformedontheformabilityofanax
3、isymmetricshape,buttherearenotanyconcretereportsontheformabilityofanon-axisymmetricshape.Inaddition,theconventionalcornerradiiofthepunchanddiehavebeendeterminedbytrial-and-errorusingindustrialexperienceandpost-processingtests,andonlyapproximatecornerradiiofthepunchanddiehavebeenpresented.Ino
4、rdertoobtaintheoptimalproductsinthedeepdrawingprocess,ellipticaldeepdrawingtestswerecarriedoutwithseveralcornerradiiofthepunchanddie.Inthisstudy,theoptimalcornerradiiofthepunchanddieinthedeepdrawingprocesswithanon-axisymmetricblankshapeareproposed.Researchhasbeencarriedoutusingdiversetechnol
5、ogiesincludingexperimentationandthefiniteelementmethod.C2001ElsevierScienceB.V.AllrightsreservedKeywords:Non-axisymmetricdeepdrawing;Punchcornerradius;Diecornerradius;Finiteelementmethod;Blankshape1.IntroductionManyresearchinvestigationsforcylindricalproductshavebeencarriedoutintothefundamen
6、talsofthedeepdrawingprocess[1—4].Thus,thishasproducedmanyappliedshapessuchasrectangular,ellipticalandnon-axi-symmetrical.Ingeneral,mostoftheresearchforthedeepdrawingprocesshasbeenperformedontheformabilityofanaxisymmetricalshape,buttherearenoanyconcretereportsontheformabilityofanellipticalsha
7、pe[5—7].Fortheimprovementoftheformabilityofdeepdrawingprocess,thepunchanddiecornerradii,thelubricantcondition,theworkingspeed,theblank-holdingforce,thefrictionforceandtheclearanceareinfluential.Ingeneral,sheetmetalformingmayinvolvestretching,drawin
