非圆回转曲面车削加工中的新型高精度快速刀具微进给系统的研究

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1、上海交通大学博士学位论文非圆回转曲面车削加工中的新型高精度快速刀具微进给系统的研究姓名：马浩全申请学位级别：博士专业：机械制造及其自动化指导教师：胡德金20040901AbstractWiththewiderandwiderapplicationOfthenon·circularpartsinindustry，andtheirprofilesarebecomingmoreandmorecomplicated，therefore，itisveryimportanttodevelopkeytechniques，whicharepreciseandproficient，toachieve

2、theturningoftheseparts．Pistons，whicharewidelyusedinindustry,arekeypartsofmotors。Inordertomeettherequirementsofmotors，SOtheshapesofpistonsarebecomingmorecomplex．Nowadays，peoplefocusonkeytechniques，thatFastToolSystemisoneofthem，ofturningpistonswiththedevelopmentofCNCmethod．Anewpiezo-drivensystem

3、，intowhichflexure-hingeamplifyingstructureisalsointroduced，isputforwardinthisthesistoachievetoolsfeeding．AccordingtothebasictechnicalconditionsofturningpistonswithCNCmethodandthecharacteristicsofpiezoelectricandPZTactuatorareatsoconsidered?awholeoutlineofFTS，whichiSdrivenbyPZTactuator，iSputfor

4、ward．Thecont．entofthisthesisare氇8following．Thededuction．inwhichvariationprincipleandpiezoelectricconstitutionequationareused．offiniteequationsofpiezoelectricceramicsiSbrieflyintroduced，andalsofiniteanMysisandexperimentsofPZTactuator，whichiSused{11theFTS，aremade。Inordertogetlargeroutputdisplace

5、mentofFTS，alleWamplifyingstructure，whichisbasedonflexurehinge。iSputforwardi11thisthesis．First，thecalculationsanddesignaremadefromtheperspectiveofstaticsanddynamics，then，topologyop-timizationsaremadetoimprovethefirst—ordermodalfrequencyandanewstructure，whichisfeasibletobemanufactured，isredesign

6、edontheresultoftopologyoptimiza-tions，last，bothmodalandfatigueanalysisaremadebyfinitemethod，andalsotheexperimentsaredonetoprovethedesignprocessiseffective．Toachievethereal-timecontrolofFTS．alinearmathematicmodelofFTSiSpresented．andthecombinationofbothrepetitiveCOntrolandPIcontrolareintroducedi

7、ntothesystemagainsttheperiodiccharacteristicofnon—circularturning，asaresult，thetracingaccuracyofperiodicsignalisincreasedandafeed-forwardcontrolisusedtodecreasetheeffectofcuttingforce．BecausethesensoreffectofPZT，piezoelectricvoltagefeed