球面滑履冷擠壓中近凈成形技術(shù)的研究與應(yīng)用.pdf

1、貴州大學(xué)2009屆碩士研究生學(xué)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(yīng)用研究與應(yīng)用學(xué)科專業(yè)：機(jī)械設(shè)計(jì)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(dǎo)師：鄭偉剛（教（教授）授）研究生：束昊中國(guó)﹒﹒﹒﹒貴州﹒﹒﹒﹒貴陽(yáng)2009年4月分類號(hào)：TH16論文編號(hào)：2006050337密級(jí)：公開(kāi)貴州大學(xué)碩士學(xué)位論文球面滑履冷擠壓中近凈成形技術(shù)的應(yīng)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