Stability and its influence factors for high-speed milling

Abstract

Based on the dynamics model of high-speed milling systems with multi-degree-offreedom( MDOF) developed, the chatter stability of high-speed milling were predicted and its influence factors were analyzed and validated by milling experiments. It is found that the stability limit of high-speed milling not only related to the first order natural frequency of the system and milling operation conditions, but also had close relations with the modal parameters, such as modal frequency, stiffness and damping ratio, of higher order modes and the number of the teeth on the tool used in milling process. And the effects of multi-mode dynamic characteristics of MDOF system, higher excited frequency (i.e. tooth passing frequency) and wider spindle speed range on stability limits must be considered in high-speed milling.