A new method of diagnosing the regenerative chatter in machining operations†

Abstract

The concept and method of diagnosing the regenerative chatter are discussed in this paper. Both theoretical analysis and experimental results demonstrate that a certain corresponding relationship between the system stability and the phase shift angle ψ in the two wavy surface: one from the previous cut and another from the current cut, and hence, one can identify whether the chatter occurring in the cutting process is a regenerative chatter. The phase shift angle ψ is concerned with the chatter frequency and the rotational speed of the workpiece. In order to improve diagnostic accuracy, digital ZOOM FFT has been applied

Notes

†Paper presented at the 9th International Conference on Production Research, held in Cincinnati, U.S.A., 17-20 August 1987