精密薄壁零件裝夾變形的分析與控制研究.pdf

1、南京航空航天大學碩士學位論文精密薄壁零件裝夾變形的分析與控制研究姓名：周小兵申請學位級別：碩士專業(yè)：機械電子工程指導教師：陳蔚芳20060301精密薄壁零件裝夾變形的分析與控制研究iiABSTRACTAmongtheprecisionpartsinaeronauticalastronauticalengineeringmanypartshavethinwallcomplexstructurehightolerancerequiremen

2、ts.Becauseoftheporigiditytheyareeasytodefmwhenthecuttingfcesclampingfcesareemployed.Itisdifficulttoensurethemachiningaccuracyusingthetraditionalmachiningtechniques.Thepurposeofthisthesisistostudythedefmationproblemsofpre

3、cisionthinwalledcomponentsintheprocessofclampingmachining.Themainwkisasfollows.Firstlytheprinciplesoffixturedesignschemefprecisionthinwalledpartswereputfward.Theinfluencedegreeonthedefmationofthinwalledpartswastheeticall

4、ystudiedwithseveraldifferentfixtures.Secondlytheclampingdefmationofthethinwalledpartswasstudied.Clampingdefmationsaredividedintomaindefmationmindefmation.FEM(FiniteElementMethod)wasusedtoanalyzetheclampingdefmation.Keyte

5、chnologiesinFEMwasstudiedtestified.Thirdlytwomethodsofcontrollingtheclampingdefmationwereputfward.Oneistooptimizethepositionsoflocatsclampersinthefixtureschemewithasubproblemiterativeoptimizationmethod.Theotheristoclampi

6、ngthewkpieceswithvariationalclampingfces.Twomethodswereexemplified.FinallyaprototypesystemwasdevelopedwhichcancreateAPDLprogrambasedonvariedrelativeparameterscallsomecommsoftheANSYSsoftwaresimulatethedefmationresult。Keyw