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旋转超声加工用纵扭共振变幅杆的动力学分析 Title:DynamicsAnalysisofLongitudinalTorsionResonanceAmplitudeBarinRotaryUltrasonicMachining Abstract: Rotaryultrasonicmachining(RUM)isanadvancedmanufacturingprocessthatcombinesultrasonicvibrationswithrotationalmotiontoimprovemachiningefficiencyandquality.ThelongitudinaltorsionresonanceamplitudebarisanessentialcomponentinRUM,whichplaysacrucialroleintransmittingandamplifyingultrasonicvibrations.Inthispaper,thedynamicsofthelongitudinaltorsionresonanceamplitudebarinRUMwillbeanalyzedtoprovideacomprehensiveunderstandingofitsbehaviorandperformance. 1.Introduction 1.1Background 1.2Objective 2.RotaryUltrasonicMachining 2.1PrincipleofOperation 2.2AdvantagesandApplications 3.LongitudinalTorsionResonanceAmplitudeBar 3.1DesignandConstruction 3.2MaterialSelectionandProperties 4.DynamicsAnalysis 4.1ModelingandEquationsofMotion 4.2NaturalFrequenciesandModesofVibration 4.3TransmissibilityandAmplificationFactor 5.ExperimentalValidation 5.1TestSetupandProcedure 5.2MeasurementofNaturalFrequencies 5.3AnalysisofResults 6.PerformanceOptimization 6.1InfluenceofBarLengthandDiameter 6.2MaterialDampingandResonanceSuppressionTechniques 7.CaseStudy 7.1MachiningParameters 7.2SurfaceQualityandMaterialRemovalRate 8.Conclusion 8.1SummaryofFindings 8.2FutureResearchDirections References Introduction: Rotaryultrasonicmachining(RUM)hasemergedasapromisingtechniqueformachiningbrittleandhardmaterialssuchasceramics,composites,andadvancedalloys.Itutilizesthecombinedactionofrotationalmotionandultrasonicvibrationtoenhancecuttingefficiencyandprecision.TheeffectivenessofRUMheavilyreliesontheproperdesignandperformanceofthelongitudinaltorsionresonanceamplitudebar. Inthispaper,ourobjectiveistoanalyzethedynamicsofthelongitudinaltorsionresonanceamplitudebartounderstanditsbehaviorandperformanceunderdifferentmachiningconditions.ThisunderstandingwillcontributetotheoptimizationofRUMprocesses,leadingtoimprovedmaterialremovalratesandsurfacequality. RotaryUltrasonicMachining: Thissectionprovidesanover