Prediction of Flatness of Fine Gauge Strip Rolled by 12-high Cluster Mill

Abstract

A mathematical model for predicting flatness of fine gauge strip after rolling is established. The model is able to obtain the soultion for the roll-kiss rolling by way of matrix computation, and it is designed to analyze any type of strip rolling mill. Flatness control capability of a 12-high cluster mill during the roll-kiss rolling is investigated using the present model. The investigation reaches the following conclusions. (1) The effect of work roll bending force on strip flatness is extremely small. (2) Intermediate roll shift is effective when tapered portion is shifted into the material width. However, without taper the effect of intermediate roll shift on the strip flatness is marginal. (3) Both back-up roll crown adjust and intermediate roll bending force are effective for flatness control.