JPS5519425A - Rolling mill - Google Patents

Abstract

PURPOSE:To flatly roll the rolling materials of various kinds of sizes and materials without requiring roll spares of multiple kinds of crown amounts by loosely fitting offcentered sleeves to both side parts and central parts of the backup rolls of the 4-stage rolling mill and providing rotating devices for controlling of the rates of offcenter to the roll bodies. CONSTITUTION:At the time of rolling a plate-form rolling material 1 by a work roll 2, sleeves 7, 8 are rotatably loosely fitted to the outside circumferences of both side parts and central part of upper and lower backup rolls 5. The central sleeves 8 are mounted with offcentering by e with respect to the revolving center of the backup rolls 5. When the rolls 5 are revolved by driving fine adjustment devices 16, the roll bodies 5 revolve about the center A of the roll bearings 12 and the center B of the central sleeves 8 deviate by e1. When rolling is done in this state and if the maximum deflection of the rolls 5 is equal to e1, the outside surfaces of the contact of the sleeves 7, 8 with the work rolls 2 become linerar irrespective of the deflections of the rolls 5 and the rolling material 1 is flatly rolled.