On-line monitoring and suppression of self-excited vibration in end milling

Abstract

A sensor system using the cutting force spectrum to monitor and suppress self-excited vibration in end milling is presented. Self-excited vibration is detected when the peak amplitude of the cutting force spectrum does not locate at the tooth frequency or cutter rotation frequency. A generalised spindle speed change method using the frequency of self-excited vibration to guide the modification of spindle speeds for suppression of self-excited vibration is then applied. Theoretical studies and experimental results show that self-excited vibration in end milling can be detected and suppressed by using this system.