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ID:40047067
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页数:9页
时间:2019-07-18
《A study on wear mechanism and wear reduction strategies》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Wear254(2003)12471255AstudyonwearmechanismandwearreductionstrategiesingrindingwheelsusedforELIDgrindingK.Fathima,A.SenthilKumar∗,M.Rahman,H.S.LimDepartmentofMechanicalEngineering,NationalUniversityofSingapore,Singapore119260,SingaporeReceived7August2002;receivedinrevisedf
2、orm10March2003;accepted1June2003AbstractMetal-bondedsuperabrasivediamondgrindingwheelshavesuperiorqualitiessuchashighbondstrength,highstabilityandhighgrind-ability.Themajorproblemsencounteredarewheelloadingandglazing,whichimpedestheeffectivenessofthegrindingwheel.Electrol
3、yticin-processdressing(ELID)isaneffectivemethodtodressthegrindingwheelduringgrinding.Thewearmechanismofmetal-bondedgrind-ingwheelsdressedusingELIDisdifferentformtheconventionalgrindingmethodsbecausethebondstrengthofthewheel-workingsurfaceisreducedbyelectrolysis.Thereducti
4、onofbondstrengthreducesthegrit-depth-of-cutandhencethesurfacefinishisimproved.Theoxidelayerformedonthesurfaceofthegrindingwheelexperiencesmacrofractureattheendofwheellifewhilemachininghardandbrittlework-pieces.Whenthewheelwearisdominatedbymacrofracture,thewheel-workingsurf
5、aceisfreefromloadedchipsandworndiamondgrits.Whentheoxidelayerisremovedfromthewheelsurface,theelectricalconductivityofthegrindingwheelincreases,andthatstimulateselec-trolyticdressing.Theconditionsappliedtothepulsecurrentinfluencetheamountoflayeroxidizingfromthegrindingwheel
6、surface.Longerpulseontimeincreasesthewheelwear.Shorterpulseontimecanbeselectedforacoursergritsizewheelsincethattypeofwheelneedshighgrindingefficiency.Equalpulseonandofftimeisdesiredforfinergritsizewheelstoobtainstableandultraprecisionsurfacefinish.©2003ElsevierScienceB.V.All
7、rightsreserved.Keywords:ELID;Metal-bondedgrindingwheel;Macrofracture;Grindingwheelwear1.IntroductionWheelwearisanextremelycomplexprocess,whichin-volvestheculminationofnumerousweareventsencoun-Metal-bondedsuperabrasivegrindingwheelsarewidelyteredbetweenmanysinglegritsandth
8、eworkpiece.Theusedtoestablishamirrorsurfacefinishonhardandbrittleconventionalwayofquantifyingwhee
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