数控镗铣床的建模与分析外文翻译

《数控镗铣床的建模与分析外文翻译》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、ModeIingandAnalysisofaSuperHeavyNumericControIBoringandMillingMachineAbstractThestructureofasuperheavynumericcontrolboringandmillingmachineisintroduced.Thedynamicmodelisestablishedonthesimplifiedstructuremodel.Thevirtualprototypeofthemachinetoolisgivenfordynamicanalysis.ThentheFEMmod

2、elisestablishedonthevirtualprototype.Finallythestaticstiffness,modal,reliabilityanalysesareperformed・Keywords:Superheavyboringandmillingmachine;modeling;FEM;Dynamicanalysis1.AcertaintypeofoverweightCNCBoringandMillingMachineTheoverweightCNCBoringandMillingMachine(machiningcenter)intr

3、oducedhereismainlyusedforlong,overweight,ultra-high,special-shapedandcomplexworkpieces.Thelandingplatformisusedastable,thustheworkpieceontheplatformisplacedinanopenspace,soprocessisnotlimitedbythesizeandweightworkpiece.ThedirectionofmovementofthecolumnonthebedisdefinedasX-axis,thedir

4、ectionofmovementofthespindleboxalongthebedisdefinedasY-axis,andthedirectionofboringaxisisdefinedasZ-axis.Multi-surfacemachiningcanberealizedbyonefixturesincethehostandtherotarytablecouldworkatthesametime.Inthismachinetool,therearethreehydrostaticguidewayswhicharecolumnmovementguide,s

5、pindleheadmovementguideandtherammovementguide.Themaindrivehas3variablespeeds・Thebedisinstalledonthefloor,theslidemovewithrackonthebed,andthecolumnwasinstalledontheslide.Thespindleboxmovesalongthecolumnwhichisdrovebytheballscrew.Spindleboxhasaframestructure,andtherammovesthroughthesqu

6、areholeintheheadstock..Theboringaxismovesinthemm.Headstock,ram,boringaxearealldrovebyscrew・Adualrackandpinionisusedonthecolumntoeliminatethegapinthedrivingsystem.Thereare4accuracycompensationswhenramstretchesout.ThismachinetoolisequippedwithCNCturntable,andthemachinetoolcanachieveani

7、ne-axiscontrolandfive-axislinkage・ModeIingandAnalysisofaSuperHeavyNumericControIBoringandMillingMachineAbstractThestructureofasuperheavynumericcontrolboringandmillingmachineisintroduced.Thedynamicmodelisestablishedonthesimplifiedstructuremodel.Thevirtualprototypeofthemachinetoolisgiv

8、enfordynamic