METHOD FOR CONTROLLING HEAT CROWN IN MULTISTAGE ROLLING BY WINDING

摘要

PURPOSE:To control the heat crowns of the work rolls disposed in multiple stages and to improve yield by heating the strip which is wound on the work rolls and is rolled on the inlet side or cooling the strip in the winding parts. CONSTITUTION:A heater 7 is provided on the inlet side for a strip S to heat the strip S so as to form a uniform or optional temp. distribution in the transverse direction thereof with a multistage rolling mill which is disposed with 4 pieces of work rolls 1-4 between upper and lower backup rolls 5 and 6 and rolls the strip S inserted successively through the gaps 11, 12, 13 between the respective work rolls by winding the strip on the rolls 2, 3. The strip S is further cooled by using water in the winding parts 8, 9 so that the temp. distribution can be formed. The time until the heat crowns of the rolls 1-4 attain the stationary state is thus reduced by which the generation of off-gage is prevented and the rolling with the optimum heat crowns is made possible.