Numerical Simulations And Experimental Investigations Of Chatter Suppression In Vibration Cutting

The occurrence of chatter is strongly influenced by the tool geometry in conventional cutting. Therefore, the tool geometry is regarded as a very important factor. On the other hand, it is known that vibration cutting is capable of cutting hardened steels. However, the theoretical explanation for finish hard-cutting with vibration cutting is still unknown.In this paper, Experimental investigations show that chatter is effectively suppressed irrespective of the tool geometry by the vibration cutting. However, in the case of conventional cutting, the occurrence of chatter is strongly influenced by the tool geometry. A new cutting model, which contains a vibration cutting process, is proposed. Simulations of the chatter model exhibit the main features including chatter suppression and small-work displacement in vibration cutting. The simulation results are in good agreement with the measurement values and it is found that the proposed model accurately predicts the work displacement amplitudes of vibration cutting. Since the tool geometry is a very important factor on the influence of chatter to conventional cutting process, chatter may be caused easily by tool wear and so on. In contrast, vibration cutting can suppress chatter even for different tool geometries. Obviously, vibration cutting achieves a higher cutting stability as compared with conventional cutting. By applying the vibration cutting method, the occurrence of chatter can be reduced significantly.