Vibration control in thin slab hot strip mills

Abstract

In a number of thin slab caster/hot strip mills, a serious vibration phenomenon can occur in F2–F4 stands during rolling thin gauge or high strength strip. In particular, the vibration of compact strip production (continuous) hot rolling mills is a more serious and difficult technical problem to resolve. When vibration occurs, chatter marks occur on the mill rolls and strip surface together with excessive noise. The problem not only reduces the life of the rolls but also poses a threat to the safety of the production equipment, having triggered a number of major accidents in the past. Following vibration theory study, computer simulation and field tests, measures were implemented to control the vibration, which achieved significant results and economic benefits.