抄録
The purpose of this study is to develop a cutting force estimation method based on servo information in ball screw drive machine tool. In this method, the cutting force is estimated by frequency analysis of servo motor torque. A frequency component depends on the cutting force is extracted from the analyzed data, and the cutting force is estimated by inverse transformation from the frequency domain to time domain. The motor torque is strongly influenced by the friction force especially in case of the axis stopped. In the proposed method, the estimated cutting force is calibrated based on the identified friction force when the force is detected along the axis stopped. In order to confirm the effectiveness of the proposed method, actual cutting tests and simulations are carried out. As the results, it is confirmed that the proposed method can estimated cutting forces accurately in case of the cutting force becomes larger than the friction force
