水射流增壓系統(tǒng)及機床結構分析.pdf

1、西華大學碩士學位論文水射流增壓系統(tǒng)及機床結構分析姓名：孫書蕾申請學位級別：碩士專業(yè)：機械設計及理論指導教師：雷玉勇20100501水射流增壓系統(tǒng)及機床結構分析AbstractUsingultrahighspeedwaterjetbeam(orabrasivewaterjet)toerodematerials，cuttingofanycomplexworkpiececanbcdoneonwaterjetmachinewiththeCNCp

2、latformWithadvantagesofunparalleledflexibility，diversityandenvironmentfriendlywaterjetmachinehasenrichedthetraditionalandnonconventionalprocessingcategoryandobtainedgreatprospectinareasincludingmechanicalmanufacturing，au

3、tomobile，armory，aerospaceThenamelyorificeistransducedinthewaterietsystemtoconvertthewaterpressureintokinematicenergyofhighspeedwaterjetUnstablewaterjetbeamisinducedbypressurefluctuationoftheintensifiersystemandthemachini

4、ngqualitycouldbeaffectedseriouslyBasedonthisphenomenonmathematicalmodeloftheintensifiersystemisbuiltwiththehelpofAMESimandsolvedusingtheadvancedsolvertoobtainthecharacteristicsintimedomainandfrequencydomainThestudyshowst

5、hatthepressurestabilityismainlyrelatedwiththeaccumulatorvolume，switchingfrequencyofthedirectionalcontrolvalveandtheorificediameterPressurefluctuationdecreaseswithincreasingaccumulatorvolumeandswitchingfrequencyTakingcons

6、iderationofthetechnicalfeasibility，whenworkpressureis300MPa，thepressurefluctuationiSrelativelysmallwhileaccumulatordiameteris80mm，switchingfrequencyis100Hzandorificediameteris026mmnesystemmeettherequirementsofprecisioncu

7、ttingAsanimportantcomponentofwaterietmachine，dynamiccharacteristicsofthecantileverbeamhasdirectimpactonthemachiningprecisionThereforjtiSessentialtoanalysisthedynamiccharacteristicsofthebeamThethreedimensionalgeometrymode

8、lofthewaterietmachineiSbuiltusingSolidWorksandmodalanalysisofthecantileverbeamiSdonewiththehelpofFEAmoduleofSolidWorksSimulationThevibrationfrequencyandvibrationmodeofthecantileverbeamarcobtainedModalanalysisshowsthatnat

9、uralfrequencyofthebeamiskeptawayfromthepulsefrequencyoftheintensifiersystemtosatisfytherequirementofprecisionmachiningneresultsofmodalanalysisprovidetheoreticaIbasisforvibrationreductionandprotectionofthewaterietmachineE

10、xperimentalresearchiSalsodoneonperformanceoftheintensifiersystemtoverifythesimulationresultsItshowsthatexperimentsagreedgenerallywiththesimulationresultAsakindofadvancedmechanicaImachiningfacility。thewaterietmachinecanbe

11、wildlyusedtomachinetheheatsensitivematerialsforitsparticularcoldmachiningcharacterAtthesametime，thewaterjetmachinehavetheadvantagesthatothertraditionalmachiningmethods鋤notbeencomparedTheresultSstudiedinthisworkhaveimport