ELID超精密磨削机理与工艺研究

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1、西安工业大学硕士学位论文ELID超精密磨削机理与工艺研究姓名：张瑛申请学位级别：硕士专业：机械工程指导教师：马保吉;于宏永20070510StudyonELIDpre-dressingprocessandcoordinationDiscipline：MachineEngineeringStudentSignatur眈2五疹j确SupeⅣis。rSignatu心：M人晒歹’Abstract讥一7一’√ljOnthebasisofacomprehensiveevaluationandanalysisofthepresentsituationoftheresearchesinELID

2、precisiongrinding，thisthesistrytomodelingandsimulatingthephenomenonoftheoxidelayerformedonthediamondgrindingwhcclsurfaceduringpre-dressinginELID，andtheexperimentalresearch011thegrowthbehaviorsoftheoxidelayeratdifferentpre-dressingconditionsinELIDpre-dressingWaSc．onducted．Usingtheequipmentsfo

3、rELIDprecisiongrinding，opticsglasswasmanufacturedtofindtheoptimumprocessparameters．nleelectrolyzedlayerofoxideplaysimportantrolesinachievingexcellentELIDgrindingresults．AgeneralmodelforELIDpre-dressingprocesswasdevelopedbasedonfundamentalelectrochemicallawsandprinciple．Someimportantfactorsco

4、ntrollingtherateofoxideformationinELIDpre—dressingwereinvestigated。蚴thesimulationresultseffectsofthesefactorsonoxidelayergrowthcharacteristicswcl"etheoreticallyanalyzed．TovalidatethemodelandsimulationresultsELIDpre-dressingexperimentswhichhadthes眦'nepre-dressingconditionwiththesimulationwere

5、done．Goodcorrelationoftheoxidelayergrowthbehaviorandthicknessgivenbythemodelandtheexperimentwasfound．强cexperimentalresultsindicatedthattheoxidelayerthicknessonthewheelsurfaceincrease、砘廿lpre-dressingtime．Theoxidelayergrowthrateisfasterinbeginningperiodtimeofpre—dressingprocessthenslowdown．Bot

6、hthethicknessandgrowthrateofoxidelayerincreasewi也theincreaseofdutyratioandappliedvoltage．Ittakeslongertimeforoxidelayergrowthratetoreachtostablestateinlowerdutyratioconditionthaninhigherdutyratiocondition．Therearenoeffectsofwheelspeedonoxidelayergrowthbehaviorsinthewheelspeedrangeofl000rpmto

7、4000rpm．田坞cathodestructureandfluidsupplywayhaveveryimportantaffectontheformationofoxidelayerparticularlyinhigllwheelspeedsituation．Inthisthesis，theequipmentsforELIDprecisiongrindinghadbeendesigned，andtheconfigurationofELIDprecisiongrindingsystemwas