球面滑履冷擠壓中近凈成形技術的研究與應用.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的球面滑履冷擠壓中近凈成形技術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：精密塑性成形技術研究精密塑性成形技術研究導師：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