圓筒件拉深的力學分析及極限拉深系數(shù)的優(yōu)化.pdf

1、湘潭大學碩士學位論文圓筒件拉深的力學分析及極限拉深系數(shù)的優(yōu)化姓名：鄔移華申請學位級別：碩士專業(yè)：材料物理與化學指導教師：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