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1、第7卷第2期航空工程進展V01.7No.22016年5月ADVANcESINAERONAUTICALSCIENCEANDENGINEERINGMay2016文章編號:1674—8190(2016)02—191一072124鋁合金曲邊薄壁結(jié)構(gòu)加工變形仿真分析申運鋒1,趙妍1,楊生國1,李永銅1,付嘉寶2,蘇宏華2,何臨江2(1.中國航天科工集團公司航天晨光股份有限公司,南京210006)(2.南京航空航天大學機電學院,南京210016)摘要:鋁合金結(jié)構(gòu)件在其銑削加工過程中,易發(fā)生加工變形和彈性讓刀,為了實現(xiàn)鋁合金曲邊薄壁結(jié)構(gòu)加工讓刀變形的預測,提出一種銑削加工過程的仿真分析方法。
2、通過不同參數(shù)組合的銑削試驗獲得切削力回歸方程,為仿真試驗切削力加載提供依據(jù);利用Python語言對Abaqus軟件進行二次開發(fā),結(jié)合“單元生死”技術(shù),針對曲邊薄壁結(jié)構(gòu)選取三種走刀方式進行銑削加工變形仿真分析;通過銑削試驗,驗證仿真分析方法的可靠性。結(jié)果表明:階梯對稱走刀方式變形量最小,單側(cè)走刀方式變形量遠大于另外兩種對稱走刀方式,隨著側(cè)壁高度的降低,差異逐漸減小,至工件底部三種走刀方式的變形量基本相同。關鍵詞:2124鋁合金;曲邊薄壁;銑削加工;走刀路徑中圖分類號:THl64文獻標識碼:ADoI:10.16615/j.cnkiI1674—8190.2016.02.009Simu
3、lationAnalysisofMachiningDeformationof2124AluminumCurvedThin—walledStructuresShenYunfen91,ZhaoYanl,YangShenggu01,LiYongton91,F(xiàn)uJiaba02,SuHonghua2,HeLinjian92(1.AerosunCompany,Ltd.,ChinaAerospaceScience&1ndustryCorporation,Nanjing210006,China)(2.CollegeofMechanicaIandElectricalEngineering,Nan
4、jingUniversityofAeronauticsandAstronautics,Nanjing2l0016,China)Abstract:Duringthemillingprocess,aluminumalloystructuralpartsareliabletoproducetheprocessdeforma—tionandflexibilitytodeclinetheknife.Asimulationanalysismethodofmillingprocessisproposedtoachievethepredictionofmachiningdeformationo
5、fcurvedthin—walledstructures.Theregressionequationofcuttingforceareobtainedbymillingexperimentsunderaseriesofdifferentcombinationsofcuttingparameterstopro—videthebasisforthecuttingforce10adingofsimulationtest.ByusingpythonlanguageforsecondarydevelopmentofAbaqussimulationsoftware,combinedwith
6、the“modelchange”technologyandthreekindsoftoolpath,mil“ngsimulationanalysishavebeencarriedonforthemachiningdeformationofcurvedthin—walledstruc—ture.Theresultsindicatethat:thedeformationofsteppedsymmetricallytoolpathisoftheminimumamount,andtheamountofdeformationofunilateralt001pathpatternismuc
7、h1argerthantwokindsofsymmetricallytoolpath.Withthereducedheightofthesidewalls,thedifferencedecreases,andatthebottom,substantiallythesameamountofdeformationobtained.Finally,thereliabilityofthesimulationanalysismillingexperimentsisverifiedbymillingex