HOT STRIP MANUFACTURING METHOD Russian patent published in 1995 - IPC

FIELD: hot rolling wide strip mills. SUBSTANCE: method involves expansion rolling of billet in group of roughing stands; conducting intermediate double winding of rolled product and simultaneously moving wound roll in rolling direction; cutting off leading end of expanded product; unwinding and rolling in finishing stands to obtain rolled strip. Rolling in roughing stands is effectuated periodically, winding and unwinding are carried out in several passes. Rolling in roughing stands is interrupted the moment each winding process is terminated. During each unwinding process in roughing stand, tail end of expanded billet is passed through separated rolls till roll is completely unwound and is returned in rolling direction. When underrolled portions enter roughing stands, rolling process in these stands is resumed. It allows slab weight to be increased without increasing the length of intermediate roller. EFFECT: increased efficiency and improved quality of rolled strip. 9 dwg