提高筒形件拉深效率的研究及壓力中心的快速求解.pdf

1、陜西科技大學(xué)碩士學(xué)位論文提高筒形件拉深效率的研究及壓力中心的快速求解姓名：吳李鵬申請學(xué)位級別：碩士專業(yè)：機(jī)械設(shè)計及理論指導(dǎo)教師：黨新安20060501THERESEARCHoNRAISINGLIMITDRAWINGRATIooFCUP—SHAPEDPARTDRAWINGANDARAPIDCoMPUTINGMETHoDoFCALCULATINGPRESSURECENTREABSTRACTDeepdrawingofsheetmetaliso

2、neofthemostimportantmethodsofmanufacturingthethinwallcup—shapedpartDeepdrawingisusedwidelyinmanufacturingindustriessuchasmachinery、electronics、instrumentandapparatusandAeroSpaceetcbecauseitshavetheadvantagesofhighutilizi

3、ngratio、highproductperformance、highproductivityItcancutdownworkingprocedureandreducethecostthatraisingtheLDRSo，thethesismakesaresearchofraisingtheLDRongripdieandconicaldiebyadoptingthemethodsofthenumericalsimulationtocal

4、culateandanalysesandexperimentsandobtainsthefollowingresultsWeproposeitcannotbeusedinfirstdrawingaftermakingtheoreticalandexperimentalstudiesOilainnovativestructuregripdie，becausethelargestdrawingstressinfirststagedrawin

5、gappearsatthebeginningstages，thefirsdrawingcrackalsocomesatthebeginningstagesTherefore，gripdiecannotbeusedforthefirsttimedrawing；howeverGripdiecanbeusedinsubsequentdrawingtaiseLDILBecausethelargestdrawingstressfromthesec

6、ond—stagecomesattheendingstagesMakingaresearchontheprincipleandkeytechnologyofnumericalsimulationbasedonthefiniteelementmethods，Simulatingthedrawingoftheconicaldiesof30degreeand45degreetoguidethenewwrinkleconditionby，the

7、Dynaformsoftware，andguidingtheexperimentsofwrinkleconditionAndthethesisthinkthetraditionalwrinkleconditioniSnotreasonableThethesisproposedthepuncharcofthepartdrewbytheconicaldieismorethickbythemeasureexperimentsofthinwal