Experimental Characterization of Chatter in Band Sawing

Abstract

In the paper the results of the characterization of the chatter phenomenon in the band sawing process are presented. In particular, the influence of the cutting speed and of the distance between the cutting blade supports on chatter characteristics was investigated. In addition to the cutting forces, and emitted sound, the machine vibrations described by the measured acceleration signals were used to characterize the chatter. Based on an analysis of these signals, a hysteresis of the chatter onset and chatter die out cutting speeds was observed. The observed cutting speed hysteresis indicates that the chatter onset in band sawing is caused by a Hopf-like bifurcation, and that cutting speed is a promising parameter for chatter control. Additionally, the strong effect on chatter characteristics of the distance between the cutting blade supports was experimentally confirmed.