PREVENTING METHOD OF CAMBER AT PRECEDING END IN ROLLING WITH DISSIMILAR DIAMETER ROLLS

摘要

PURPOSE:To decrease the camber at the preceding end of a rolled material by rolling with dissimilar diameter rolls by lubricating highly the corresponding part on the outside of the rolled material where the camber is generated by the rolling with dissimilar diameter rolls. CONSTITUTION:There is a tendency toward cambering of the top of a rolled material at high curvature in rolling with dissimilar diameter rolls using an upper work roll 2 of a small diameter and a lower work roll 3 of a large diaeeter. The surface in the top part corresponding to the outside of the camber of the material 1 prior to rolling is lubricated selectively so as to be lubricated more highly than the other surface. The surface roughness of the roll 2 in such rolling mill is set larger than the surface roughness of the roll 2, and the camber at the preceding end of the material 1 is prevented by the difference in roughness and the same is further compensated with the difference in the lubrication on both surfaces of the rolled material.