Mechanism and suppression of frictional chatter in high-efficiency elliptical vibration cutting

This research clarifies the mechanism of undesirable vibration observed during high-efficiency elliptical vibration cutting. Elliptical vibration cutting has recently been utilized in practice, and some applications require high-efficiency machining at large width of cut causing vibration problems. Therefore, its mechanism is investigated by analyzing the finished surfaces and the undesirable vibrations superimposed on the elliptical vibration. The vibration is clarified as a kind of frictional chatter induced by ploughing on the tool flank at the beginning of cutting in elliptical vibration cycles and has unique characteristics such as occurrence with sharp tools, low amplitude, and surface waviness at beat frequency.