CHATTER IN THE STRIP ROLLING PROCESS, PART-3 - CHATTER MODEL

The central problem of the analysis and prevention of chatter in rolli ng operations is in understanding the conditions which lend to dynamic instability. By analogy with metal cutting operations, it appears tha t a few basic mechanisms may be responsible for the occurrence of self -excited vibrations in rolling. The three most significant mechanisms are: negative damping, mode-coupling and regeneration. In this paper n egative damping and mode-coupling are considered separately in an ''ar tificial'' manner to make inroads reward a better basic understanding of rolling instability.