A NEW METHOD TO DETECT REGENERATIVE CHATTER USING SPECTRAL-ANALYSIS .1. BASIC STUDY ON CRITERIA FOR DETECTION OF CHATTER

The purpose of this study is to introduce a new criterion for detectin g regenerative chatter by application of spectral analysis. From the r egenerative chatter theory it can be seen that the vibration amplitude perpendicular to a workpiece surface comes equal to the amplitude of surface undulation at the stability limit. So the regenerative chatter theory is applied to the criterion introduced in this study to detect regenerative chatter. Validity of this criterion was examined by usin g numerical simulations assumed to be orthogonal, and then experiments for verification of criterion validity were carried out using the reg enerative chatter of a turning workpiece in orthogonal cutting. We con cluded that this criterion is reliable enough to detect regenerative c hatter.