Study on the self-excited Vibration in Cylindical Grinding Process

Abstract

In this study, we aim at obtaining the grinding conditions that suppresses chatter vibration without lowering machining efficiency. Although we focused on only on the degrees of freedom in the horizontal direction and the vertical direction up to now, this time we have derived a new analytical model and implemented it, with a viewpoint on the degree of freedom of rotation direction. By conducting eigenvalue analysis on the analysis model, it is verified whether generation of self-excited chatter vibration can be suppressed or not. The studies have shown that the new model can display the dynamic instability. The cause of dynamic instability is the asymmetry of the stiffness matrix, which physically is due to connectivity between horizontal motion mode and rotational motion mode.