Suppression of chatter vibrations in simultaneous machining operations

In simultaneous machining processes more than one cutting tool cut the same workpiece simultaneously offering increased productivity. However, the dynamic interaction between the tools may introduce additional stability problems, and thus needs to be analyzed. In this paper, analytical models are presented for the chatter stability of parallel turning and milling processes. The stability diagrams are obtained for different parallel machining conditions demonstrating the effects of dynamic interaction between the tools. Conditions for increased stability are also demonstrated through examples. The predictions are verified by time-domain simulations and experiments carried out on multi-tasking machining centers.