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基于AWB高速立式加工中心主轴箱抗振特性研究.docx

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基于AWB高速立式加工中心主轴箱抗振特性研究 Abstract Thespindleboxisacriticalcomponentofhigh-speedverticalmachiningcentersthataffectstheiroverallperformanceandaccuracy.Therefore,understandingitsvibrationcharacteristicsisessentialforimprovingthemachiningqualityandefficiency.Inthispaper,theantivibrationpropertiesofthespindleboxofanAWBhigh-speedverticalmachiningcenterwerestudiedandanalyzed.Thefiniteelementmethodwasusedtosimulateandanalyzetheeigenvalueofthespindlebox,andthemaximumdeformationandstressofthespindleboxunderdifferentloadswereevaluated.Basedonsimulationresults,recommendationsforimprovingthestructuralantivibrationofthespindleboxwereproposed. Keywords:spindlebox,high-speedverticalmachiningcenter,antivibrationproperties,finiteelementmethod Introduction High-speedverticalmachiningcentersarewidelyusedinthemanufacturingindustrybecauseoftheirhighmachiningaccuracy,efficiency,andautomation.However,theirperformanceislimitedbyvibration,whichcanaffectthemachiningqualityandaccuracy.Thespindleboxisoneofthemostimportantcomponentsofthemachinetool,whichdirectlyaffectsthemachiningaccuracy,surfaceroughness,andtoollife.Therefore,understandingtheantivibrationpropertiesofthespindleboxcanhelptooptimizethedesignandimprovetheoverallperformanceofthemachine.Inthispaper,wefocusonstudyingtheantivibrationpropertiesofthespindleboxofanAWBhigh-speedverticalmachiningcenter. ModelingandAnalysis ThespindleboxoftheAWBhigh-speedverticalmachiningcenterismodeledusingthefiniteelementmethod(FEM).Thegeometryandmaterialpropertiesofthespindleboxarebasedontheactualmachine'sspecifications.TheFEMmodelincludesthespindle,bearings,spindlehousing,andothercomponentsthataffectthevibrationcharacteristicsofthespindlebox.Theboundaryconditionsofthesimulationincludefixingthespindleassemblyandapplyingloadstothecuttingtool. Eigenvalueanalysisisusedtodeterminethenaturalfrequencyandmodeshapeofthespindlebox.Theresultsshowthatthefirstnaturalfrequencyofthespindleboxis930.49Hz,andthesecondnaturalfrequencyis1,035.49Hz.Thefirstmodeshapeofthespindl