Abstract
This paper presents a sensor-less process monitoring method to detect chatter vibration in square end milling. The method of detecting chatter vibration using external sensors such as accelerometer and force sensor has been proposed. However, using external sensors increases the cost of manufacturing systems. Therefore, a novel method without using any external sensors is developed to detect chatter vibration. Disturbance torque acting on the spindle is estimated by using disturbance observer and used simultaneously for spectrum analysis. From the experimental results, it is confirmed that the proposed method enables to estimate high-frequency disturbance such as chatter vibration.
