Determination of optimal shapes for the stampings of arbitra(4)

H.Shim/JournalofMaterialsProcessingTechnology121(2002)116±122119

Fig.flange6.contour;Experimental(b)beforeresultsdrawing;forthe(c)optimalafter

drawing.

blank(trapezoidalcup):(a)determinedcupastheoptimalblankofthecuttingWithdrawingbeenmethod,thedeterminedatthepunchdisplacementpresentof20mm.

trapezoidalthetrapezoidaloptimalcupblank,drawingpreparedexperimentbyawireblankFig.carriedhas6showsout.

theexperimentalresultsfortheoptimal¯angeatthepunchdepthof20mm.Fig.6(a)showsthe¯angecontourscontourcontourspecimenalmostbeforeexactly.afterwithdeformationthecomparisonandafterFig.drawing6(b)andcoincidesoftargetshape.Theexperiment,(c)showswiththetherespectively.photostargetof3.2.Oilpandeepdrawing

oilInplicatedpanorderformingtotesthastheperformanceofthesensitivitymethod,formingshape.Thebeenmainchosencharacteristicsastheexampleofofcom-depthisthattheprocesscontainsrapidchangetheofdrawingoilpanprogressiveandhencegeometrycontactrisingbetweenwallwrinklepunchandisaptblank,tooccureffectdueoftoatThetargettransition.

theshapehascontourthe¯ange.errorallowanceTheoffsetuniformisdtakenistakentrimmingwidthof1.75mmas0.5asmm.1.0mmwhiletheFig.7.Diegeometryforoilpandeepdrawing.

Fig.Theprocedure7.dieFig.geometry8showstheforoilevolutionpandeepofdrawingisshownintheFEcupanalysis.targetshape.bycomparingthedeformedoptimal¯angeblankcontourdesignandFig.The8(a)deformedshowstheshape¯angeiscontourobtainedfromthedrawnwithf130circularblank.The¯angecontourofadrawnoftheFig.design8(b)cupandexhibits(c)showssomedeviationfromthetargetcontour.presentstages,respectively,the¯angewhichcontoursisdeterminedof2ndandby3rdmodi®cationsensitivityallowanceofblankmethod.reachedAstheshapeerroreafter2ndtheshapeof0.5mmateveryoutermostwithinthenode,contourtheblankerrorpresenthasoilbeenpandrawing.

determinedastheoptimalblankofthecuttingWithcarriedmethod,thedeterminedtheoiloptimalpandrawingblank,experimentpreparedbyhasabeenwireblank.Fig.9out.

showstheexperimentalresultswiththeoptimalcomparisonFig.9(a)afteroftargetshowsshape.the¯angecontourtogetherwiththethepantargetdeformationnearly,thoughThenotdeformedexactly,¯angecoincidescontourwithtobedrawingshape.verypromising.iscollected,HoweverFig.theifthe9(b)experimentdeformationbehaviorofoiland(c)showscanbetheconsideredphotos

of