球面滑履冷擠壓中近凈成形技術(shù)的研究與應用.pdf

1、貴州大學2009屆碩士研究生學位論文球面滑履冷擠壓中近凈成形技術(shù)的球面滑履冷擠壓中近凈成形技術(shù)的研究與應用研究與應用學科專業(yè)：機械設計及理論研究方向：精密塑性成形技術(shù)研究精密塑性成形技術(shù)研究導師：鄭偉剛（教（教授）授）研究生：束昊中國﹒﹒﹒﹒貴州﹒﹒﹒﹒貴陽2009年4月分類號：TH16論文編號：2006050337密級：公開貴州大學碩士學位論文球面滑履冷擠壓中近凈成形技術(shù)的應用IIsummarysummarysummarysummar

2、yAtpresentwiththemetalplasticdefmation“nearfmingprocessing“conceptproposedtthetraditionalfmingtechnologyistransfmeditmakestheroughfmingintoprecision、highquality、costeffectivefming.Piecesofprecisionfminghavetheshapeofapre

3、cisesizeshaperelativepositionaccuracyalowersurfaceroughness.Inthispapersphericalslipperyfootsteppartsindertoachieveprecisionof18μminmassfmingproductionitisahighprecisionfminginthesubjectitmakinguseofnearfmingtechnologyth

4、eintegrateduseofprecisiondietechnologycomputertechnologyautomationtechnologynumericalanalysissimulationtechnologytoensurefmingpartsprecision.Theissueoffmingofsuchslipperyfootsteppartscarryedoutindepthanalysiscertifiedexp

5、erimentseventuallymadeatrialofthesampleofcoldextrusion.Inthecourseofthestudythroughtheanalysisofslipperyfootstepprocesstookafmingprocesstheuseoffgingsimulationsoftware(QFM)conductedasimulationstudyofprocessafmingcanmakes

6、lipperyfootstepfmbutitcannotguaranteethesphericalshapeaccuracyofpartsthepressureofapressurefmingislargeitiseasytodamagemoldtherefeimprovingtheprocessintoprefmingfinalfmingprocessaccdingtothetwofmingprocessdesigningreason

7、ableprecisioncoldextrusiondiethefmingexperimentswerecarriedoutinthe315tonsprecisionhydraulicpresstheslipperyfootstepdiecanachievefmbutwhenextrudedthecefrequentlybrokenbutwhentopoutfmingslipperyfootstepitthinwalledptoccur

8、redplasticdefmation.Theissueanalyzedthefractureofceitdesignedtheballconecetoresolvehefractureofcewithrespecttothethinwalledptsoccurredplasticdefmationitrelatedtotheissueofsphericalreboundthesubjecadoptstrilinearcodinates

9、measuringinstrumentnumericalfittingmethodstostudythephenomenonoftherebounditobtainedresilientdefmationequationwhichprefmingresilientdefmationequationfcalculatingresilientcohesionfcetoprovideanimptantbasisfdesigningrotati

10、ondemouldingfinalfmingresilientdefmationcanbeusedtocrectcesphericaldiametertolerancesoastoensuretheaccuracyofsphericalshape.ThesubjecthasinnovationinthecoldextrusiondiestructureConsideringmakingthedieceslipperyfootstepth

11、erelativelyrotatetoeliminatemicrocosmicmechanicalbitingfceofthediecetheinnersurfaceofslipperyfootsteptounloaddieindertosolvethethinwalledptoccurringplasticdefmationittoensuretheaccuracyoffmingpartsthefinalexperimentissli

12、pperyfootstepsizeprecisiontomeettherequirementsofthedrawings.Thispaperwithplentyofillustrationfmhasexpressedtheeticalcalculationsimulationanalysisexperimentresultvisually.Practiceshowsthatthewkmanshipofclodextrusiontechn