The Research About The Effect Of Tool Geometry Angle And Nose Radius On Regenerative Chatter

The occurrence of regenerative chatter is strongly influenced by the tool geometry in conventional cutting.Therefore,the tool geometry is regarded as a very important factor.It is known that ultrasonic vibration cutting is capable of cutting hardened steels without chatter.However,the theoretical explanation for how to suppress chatter by vibration cutting is still unknown.In this paper,Experimental investigations show that chatter is effectively suppressed irrespective of the tool geometry.However,in the case of conventional cutting,the occurrence of chatter is strongly influenced by the tool geometry.Simulations of the chatter model exhibit the main features including chatter suppression and Pulse cutting force in ultrasonic vibration cutting.It is found that since the tool geometry is a very important factor on the influence of chatter to conventional cutting process,chatter may be caused easily with tool rake angle getting bigger and clearance angle smaller;in contrast,ultrasonic vibration cutting(UVC)can suppress chatter even with different tool geometries and bigger nose Radius.Obviously,ultrasonic 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.