圓筒件拉深的力學(xué)分析及極限拉深系數(shù)的優(yōu)化.pdf

1、湘潭大學(xué)碩士學(xué)位論文圓筒件拉深的力學(xué)分析及極限拉深系數(shù)的優(yōu)化姓名：鄔移華申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料物理與化學(xué)指導(dǎo)教師：彭炎榮20010401些堡：!塑翌生蘭堡!：堡苧AbstractCupdrawingisoneoftheimportantoperationsinsheetmetalformingAsviewedfromdeformationandmechanics，cup—drawingofacylindricalcupisacom

2、plexprocess，Nowtheplasticinstabilityofcupdrawingofacylindricalcupisusuallymeasuredbythelimitingdrawingparameteryet，thelimitingdrawingparameterisexperiencedatabasedonaparticularexperimentconditionTheseconditionsinclude：di

3、mensionofworkpieceandblank，characterofmaterial，radiusofthediearcandpunch，situationoflubricateandpressedge，etcTheseconditionsaredifferentindifferentdesignofpracticalproduceAlthoughtheoryanalysisandexperienceaccumulationpr

4、ovideaprinciplefordrawingupaplanofatechnologyinthecupdrawingofacylindricalcup，thisonlyprovidearangeofchoiceprocessvariablesInthisrange，thechoiceofvariablesstilldependonexperienceAsetofvariablescanoftenmaketheprocessfeasi

5、ble，butcan’tmakeitbest，can’tmakeitsaveeffort，saveeffect，flexibleandsavematerial，andalsoCan’timprovethepropertyofworkpieceThus，theoptimizationdesignforthelimitingdrawingparameterofthecupdrawingprocessisverynecessaryAtpres

6、ent，therearemanyresearchesonthelimitingdrawingparameterininternalandexternalSeveralaffectfactorsofcylinderpartlimitingdrawingparameterindeep—drawingweresummarizedindetailSomenewandpracticallyapplicableequationsforestimat

7、ingthelimitingdrawingparameterinthecupdrawingofacylindricalcupwithaflatnosedpuncharederivedseparatelybasedontheloadmaximumprincipleforlocalizationoftheplasticflowButthereportsofoptimizationdesignforthelimitingdrawingpara