Roller Stress and Strain in a Broad-Strip Cold-Rolling Mill

On the basis of SIMULIA Abaqus finite-element software, the stress and strain in the rollers of a four-high rolling mill may be mathematically described. The convex–concave (CVC) profiling of the rollers and the axial shift of the working rollers are taken into account here. The transverse profile of the cold-rolled strip obtained by simulation is verified experimentally. The influence of the axial shift and hydraulic flexure of the working rollers on the stress–strain state of the working rollers in cold rolling is studied. It is established that the control procedures employed for the 2100 four-stand broad-strip cold-rolling mill at PAO Severstal permit broad regulation of the transverse strip-thickness variation in rolling without significant increase in stress in the working rollers. The proposed model of the roller system is recommended for use in improving the CVC profiling of rollers and assessing roller life in sheet production.