三通管液压成形与模具参数化研究

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1、南昌航空大学硕士学位论文摘要模拟结果相吻合，而且成形效率高，成形质量好，满足三通管件的成形要求。关键词:铝合金，有限元模拟，液压成形，CATIA二次开发，CAA,成形实验II南昌航空大学硕士学位论文AbstractAbstractHydroformingtechnologyisawholecomplexplasticformingtechnology.T-Tubehydroformingtechnologyoffersitsseveraladvantages:highaccuracy,lowquality,lo

2、werroroftheassembly，lowcost，etc.anditwillbehavinggreatapplicationvalueanddevelopmentprospectsinaerospace,automotive,andotherfields.Intheactualproduction,consideringsomefactorsofthedeformationoftubeblank,longdesigncycle,complexmolddesignrepairingtothepersonco

3、mplexfactors,Hydraulicformingdiespecialparametricintegrationsystemhasbecomeawayofconvenient,improvingtheefficiencyofdesignfort-tube.Therefore,thisdissertationusesthemethodofsimulationcombinedwithexperimentalstudy,withtheparameterizeddesignofthedie,forthespec

4、ificationsof32mm×1mmLF2Maluminumalloytube,carryoutbasicresearch.Thestudymainlyconcentratesinfiveaspects:（1）Foraccuratemeasurementofdiameterof32mm,wallthicknessof1mmmaterialpropertiesofLF2Maluminumalloytube,bymeansoftensiletestofconstantspeeddisplacementmeth

5、od.OntheonehanddissertationgetmaterialplasticstrainratioRvaluebynotbreakingtensiletest;andontheotherandbygettingthetruestressstraincurvegraphfittingmaterialstrainhardeningindexnvalueandintensitycoefficientKvalue.（2）Inordertofindthelawabouteffectoft-tubehydro

6、formingparameterandrulesaboutthethicknessoftheforming.Dissertationstudythet-tubehydroformingbythefiniteelementsoftware.Itisshowedthatwiththecontinuousincreaseoffrictioncoefficient,branchheightisreducedandthepipethicknessdifferenceisrising;withthecontinuousin

7、creaseoffilletradius,branchheightisincreasedandthebranchpipewallthicknessdifferenceisreduced.Thereasultofthedistributionofthebranchpipethicknessis:Inthecentertopbranchangle,downalongbranchpipethethicknessdecreasesgradually,andthethicknessoffilletareareachthe

8、maximum.（3）Inordertofindsuitableinternalpressureloadingpath,dissertationalsohascoMPareddifferentmethodsofinternalpressureloadtosinglelinearloadingpaths.Itisshowedthatinthatinternalpressureloadin