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《基于數(shù)值模擬技術(shù)的板料成形回彈預(yù)測的研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、華南理工大學(xué)碩士學(xué)位論文基于數(shù)值模擬技術(shù)的板料成形回彈預(yù)測的研究姓名：席國艷申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：機(jī)械制造及其自動(dòng)化指導(dǎo)教師：阮鋒20050501華南理T大學(xué)碩士學(xué)位論文AbstractSheetmetalformingisaveryimportantmanufacturingtechnologyinmodernindustry，thespringbackphenomenonisaninescapableproblemofbending，andspringbackinsheetmetalmakethesheetmetal擔(dān)shapeapartfromtheshapeoft
2、hetoolsafterformingprocessanditwillinfluenttheproducts?dimensionprecision．Ifthespringbackinsheetmetalcanbepredictedbeforeforming，wecancompensateitinthestageofmolddesigning，andcanimprovetheproducts?precisionandsavelargemanpowerandmaterialresources．Becauseinfluencedbymanyfactors，SOitisdiffic
3、ulttoexpressthespringbackintheory，thesheetmetalformingnumericalsimulationbaseonthefiniteelementtechnologymakeitispossibletosolvetheproblem．inthispaperselecttheU—shapeasthestudyobject，studythespringbackruleofthiskindofproductscombinedwiththenumericalsimulationtechnology．Sheetmetalformingnum
4、ericalsimulationisastrongnonlinearproblemincludinggeometricnonlinear，materialnonlinearandcontactnonlinear，andtheprecisionofnumericalsimulationisinfluencetheprecisionofthespringbackprediction，inthispaper，thekeytechnologyofnumericalsimulationisdescribedindetail，andusetheU—typedsheetpartsdeep
5、drawspringbackinUMISHEET’93toverifythereliabilityofthekeytechnology．Thespringbackinsheetmetalformingisinfluencedbymanyfactors，itisimpossibletobuildamathematicsmodelofthespringbackpredictionmodelincludeallofthesefactors，inthispaper，designtheexperimentsofthesefactors，collecttheexperiments?da
6、tawiththenumericalsimulationmethods，andusethisdatatocollateandfilterthefactorsduetoitsinfluentdegreeofspringback，andanalysetheinfluenttrendofeachfactor．Thendesignnewexperimentsofthereservedfactors，andstatisticregressofthegreatdealofexperimentaldata，tothetwokindsofbendingmethods?一freebendin
7、gandcorrectbending，builttherelevantmathematicsmodelsofthespringbackprediction，theindependentvariableinthemodelsincludematerialspropertiesparameters，relativebendingradiusofworkpieceandtheclearancebetweendieandpunch．Wealsodesignmanyexperimentstoverifythetwokinds
