On the Role of Interstand Tension in the Chatter of Rolling Mills Available to Purchase

Asymptotic methods are used to study the role of interstand tension in the chatter of rolling mills. A two-stand mill is considered and the effect of interstand tension on the vibrations of the second stand is considered. The interstand tension is also the exit tension in the sheet at the exit point of the first stand and therefore, is determined by the rolling parameters of the first stand. The steady part of the interstand tension is shown to cause the effective spring coefficient of the second stand to be very small under some operating conditions. The dynamic part is shown to act as a forcing function to the vibrations of the second mill. The conditions under which interstand tension leads to self-excited vibrations and resonance in the second stand are extracted from the model.