SHORT PAPERS TURNING OF SLENDER WORKPIECES: MODELING AND EXPERIMENTS

This paper introduces a dynamic utting force model for turning of slender workpieces, as well as experimental results related to the frequency response of the workpiece in turning. The model is based on a flexible workpiece and rigid machine tool, and a workpiece displacement dependent cutting force. The model is described and studied theoretically as well as experimentally. The experimental studies utilise both cutting force and workpiece vibration measurements in two orthogonal directions. This data is obtained for both cutting and non-cutting conditions, and analysed in the frequency domain. The model was found to be in partial agreement with the experimental results. The experimental procedure described here represents a new method for determining the cutting process damping ratio, based on differences inthe measured workpiece natural frequencies with and without cutting. 1