BACKUP ROLLING ROLL OPERATION METHOD (ITS VARIANTS) Russian patent published in 1997 - IPC

FIELD: rolling equipment. SUBSTANCE: backup roll of wide strip hot rolling mill begins to operate in finish group of rolling stands until wear of active layer of said roll by 40-60%. Then slopes with length no more than 370 mm and depth no more than 2 mm are made and said backup roll operates in rough group of stands until its complete wear. In second variant of invention backup roll in finish group of stands operates until crumbling out edge of its barrel. Then slopes of above mentioned size are made on end portions of roll barrel and said roll operates in rough group of stands. EFFECT: lowered crumbling out of backup rolling rolls, enhanced quality of rolled stock due to elimination of thickness difference of rolled sheet. 2 cl, 1 dwg