JPS56111513A - Rolling mill - Google Patents

Abstract

PURPOSE:To provide a rolling mill possible to easily alter its rolling function from four stages to five stages or from five stages to four stages, obtained by employing plurally segmented guide block for keeping the distance between the chocks of the work rolls contacting with the upper and lower backup rolls. CONSTITUTION:When the five-stage rolling mill is used as the four-stage rolling mill, the lower work roll 4 and its backup roll 13 are withdrawn together with the lower work roll chock 10. Next, after removing each central guide block 11 from the housing 12, each balance cylinder 16 and the screw down devices, etc., for upper and lower backup roll chocks 17, 18, are operated so as to overlay each upper guide block 7 upon the lower guide block 9; hereby, the intermediate roll 5 is used as the lower work roll. On the other hand, when the four-stage rolling mill is to be altered to the five-stage rolling mill, the above-mentioned procedures are reversed in order to alter the rolling function from four stages to five stages.