Application of a Mathematical Model for The Cold Rolling Process on Six-High Mills

Abstract

Since the seventies, six-high mill technology has been introduced in several hot and cold rolling plants. Its main advantage in comparison to the classical four-high mill is its large range of mechanical shape control. Thus, the effective roll gap is significantly influenced by work and intermediate roll bending and intermediate roll shifting. In this way a wide range of strip widths and materials can be rolled without fitting the crowns by roll changing. Another advantage is the fairly small work roll diameter that reduces roll force and torque and considerably decreases the edge drop effect. It allows the rolling of harder material and the achievement of very thin final strip thickness. Several papers published by manufacturers and suppliers deal with the six-high mill technology /1,2,3/. These results are mostly based on practical experience.