Abstract
This paper deals with the cutting force monitoring for intelligent end milling operations. A monitoring method, which utilizes sensitive displacement sensors, is discussed. The sensors are installed in X Y directions near the front bearings of the spindle, to detect the small displacements of a spindle caused by cutting forces. Cutting forces are estimated from the displacement signals by the simple signal processing technique. Impact hammering tests and cutting tests are conducted to validate the monitoring method. The test results show that the dynamic force can be estimated from the signals of the displacement sensors.