Analysis of fixturing dynamic stability in machining

Abstract

This paper presents a systematic approach for analyzing the dynamic stability of a fixtured workplace during machining. Insight into the effects of fixture-workpiece system dynamics, material removal, and clamping forces on fixturing stability is obtained. The influence of clamping forces on fixture-workpiece contact stiffness is also investigated. Fixturing stability is checked by monitoring the contact interaction between the workpiece and fixture elements. A dynamic model that predicts workpiece motion subjected to cutting forces and a static model for contact deformation due to clamping are developed to obtain the total contact motion. A simulation example is presented to illustrate the approach