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时间:2020-03-25
《高速切削Ti6 Al4 V锯齿形切屑形成的表征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、机床与液压Mar.2014HydromechatronicsEngineeringV01.42No.6DOI:10.3969/j.issn.1001—3881.2014.06.014CharacteristicsofserratedchipformationinhighspeedmachiningTi6AI4VQi—biaoYANG,PengCHEN,Da—zhangYOU,Zhan—qiangLIUSch。。ofMechanicalEngineering,HubeiUniversityofTech。logy,WuhⅡn430068,Chin。:2S
2、choolofMechanicalEngineering,ShandongUniversity.Jinon250061.ChinAbstract:Adeepunderstandingofthegenerationandcharacteristicsofserratedchipformationcanobtainsomepracticaladvicesofcontrollingthistypechipinengineeringapplications.Thecharacteristicsofserratedchipincludingthefrequen
3、cyofserration,thedegreeofsegmentationandthespaceofadiabaticshearbandarecomprehensivelyinvestigatedinthispaper.Experi.mentsofhighspeedmillingTi6AI4Vwereperformed.TheinvestigatedmaterialisTi6AI4Vsinceitispronetoformserratedchipinmachiningprocess.ThechipsofTi6AI4Vunderdiferentcu~i
4、ngspeedsandfeedpertoothwerecollectedduringmachining.Afterinlayandpolishingprocessforthecollectedchips,thechipmorphologycouldbeobservedbyVHX-600ESOdigitalmicroscope.Theexpressionsofthefrequencyofserration.thedegreeofsegmentationandthespaceofadia.baticshearbandweredeterminedthrou
5、ghmicrocosmicobservation.Theresultsshowthatthespaceofadiabaticshearbandgetsdecreasedwiththeincreaseofcu~ingspeedandthefeedpertooth.Onthecontrary,thefrequencyofserrationwillgetincreasedwiththeincreaseofthecut.tingspeedanditwillgetdecreasedwiththeincreaseofthefeedpertooth.Theincr
6、easeofcut.tingspeedorthefeedpertoothcouldintensifythedegreeofchipsegmentation.Thedegreeofsegmentationcanbeusedasthecriterionofordinarycu~ing,highspeedcu~ingandultrahighspeedcu~ing.Keywords:Serratedchip,HighspeedmachiningAdiabaticshearband,Ti6AI4V,process.Thestudyofthecharacteri
7、zationofserrated1.Introductionchipisconducivetoacorectunderstandingofserra—tedchipformationmechanism.ThroughorthogonalTi6AI4Visakindofdificult.to—cutmaterialduecuttingTi6AI4V,itwasfoundthattheshearbandtothelowthermalconductivityandlowelasticmodu—widthandthespaceofshearbandwered
8、eterminedlus.Itispronetoformserratedchipinhighspeedbym
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