ROLLING ROLL OF CONTINUOUS HOT FINISHING MILL

摘要

PROBLEM TO BE SOLVED: To improve the rolled shape of hot finishing rolled strip and raise the quality, and further to improve the yield as well by forming a recessed crown into a back-up roll and further forming a bearing pressure optimizing shape on the both ends of the back-up rolls in the direction of width. SOLUTION: Each of the recessed crowns 3, 3a of back-up rolls 4, 4a is decided respectively by the amount of projecting crown of work rolls 1, 1a as each of them approximately corresponds to the respective height of projecting crown 2, 2a of work rolls 1, 1a. The bearing pressure optimizing shape 5 of the crowns 3, 3a formed on the both ends of back-up rolls 4, 4a in the direction of width connecting to the recessed crowns 3, 3a of back-up rolls 4, 4a is decided by the width of passing-through strip with the size of width of various kinds of rolled strips. Thereby, equalizing the bearing pressure between the work roll and back-up roll in the direction of width relaxes the deviation of contact stress in the direction of width between the work roll and the rolled strip.