Abstract
High-speedprocessingtechnologyisoneofthecoretechnologiesinthedevelopmentof
manufacturingindustry,whichaffectsthequalityofproductsandproductionefficiency.The
motorizedspindleisthecorefunctionalcomponentofthe5-axismachiningcentermachine
tool,anditsperformancedirectlyaffectstheprocessingaccuracyandprocessingefficiency.
Thestructureofthemotorizedspindleisoptimizedanditsdynamicandstaticperformanceis
studiedtoimprovetheperformanceofthemotorizedspindle,soastoimprovetheprocessing
abilityandaccuracyofthe5-axismachiningcenter.
Inthispaper,thebasicstructureofthe5-axismachiningcenterelectricspindleisbriefly
analyzed,andtherelevantanalysisparametersaregiven.Accordingtothedynamicmodelof
theelectricspindleunitstructure,thefiniteelementanalysismethodisusedtosolvethe
dynamicmodeloftheelectricspindleandoptimizethedesign.Aimingattheresearchofthe
structureoptimizationdesignoftheelectricspindle,theinfluenceofthemainparametersize
oftheelectricspindleontheperformanceoftheelectricspindleisanalyzed,andtheelectric
spindlemodelisestablished.Inordertoimprovethestaticstiffnessoftheelectricspindle,the
overhangandsupportspanareusedasdesignvariablestooptimizethedesignoftheelectric
spindle,andthebestsizeoftheoverhangandsupportspanisfound,Theoptimizedspindle
stiffnessisincreasedto823.7N/mm,whichis4.4%higherthantheoriginalstiffness.
Thevibrationcharacteristicsofmotorizedspindlearestudied.Firstly,basedontherotor
dynamicstheoryandclassicalmechanicstheory,thedynamicmodelofmotorizedspindleis
establishedbyusingtransfermatrixmethod,andthelow-orderresonancefrequencyandmode
shapeofmotorizedspindlearecalculatedbysearchingm