Development of Damper to Suppress Chatter Vibration in Lathe

Abstract

The purpose of this study is to develop the practical damper which can suppress the regenerative chatter in the lathe. First, based on the stability analysis of the dynamic cutting process, the optimum combination of the damper parameters were theoretically investigated, and then the damper was designed. The rubber roller which serves as the spring as well as the damping element is in contact with the workpiece. The natural frequency of the damper can be changed by moving the added mass along the arm of the damper. This idea made it possible to adjust the damper parameters corresponding to the dynamic characteristics of the main vibration system. The effect of the damper was investigated through the actual cutting tests. It was confirmed that the considerable increase of the critical width of cut was obtained.