CHATTER STABILITY ANALYSIS APPROACH FOR STABILITY ANALYSIS OF ROTATING MACHINERY VIBRATIONS

Abstract

Vibration caused by massimbalance is an important factor limiting the performance and fatigue life ofthe rotating system. Therefore, a balancing procedure is necessary for rotatingsystems. Spindle is the main mechanical component in machining centers. Itsperformance has a direct impact on the machining productivity and surfacequality of the workpiece. In this paper, regenerative chatter analysis approachis used for vibrations of rigid rotors with a massless elastic shaft. Thisapproach is firstly applied in literature by this study. In this study,Stability Lobe Diagram (SLD) is plotted the boundary between stable andunstable rotations as a function of spindle speed and imbalance mass. SLDprocess can be easily applied between spindle length,balancing mass amount, location of balancing mass on rotor etc. variableparameters and spindle speeds for stable rotating system.

Vibration caused by mass imbalance is animportant factor limiting the performance and fatigue life of the rotatingsystem. Therefore, a balancing procedure is necessary for rotating systems. Spindleis the main mechanical component in machining centers. Its performance has adirect impact on the machining productivity and surface quality of theworkpiece. In this paper, regenerative chatter analysis approach is used forvibrations of rigid rotors with a massless elastic shaft. This approach isfirstly applied in literature by this study. In this study, Stability LobeDiagram (SLD) is plotted the boundary between stable and unstable rotations asa function of spindle speed and imbalance mass. SLD process can be easilyapplied between spindle length, balancing massamount, location of balancing mass on rotor etc. variable parameters andspindle speeds for stable rotating system.