| 摘要 |
PURPOSE:To decrease the load of a rolling mill by controlling the tension between finishing stands to a specific range in the stage of warm rolling. CONSTITUTION:An inlet side thermometer 3 is disposed on the inlet side of a finishing mill 1 to measure the inlet side temp. of a steel sheet 2. Sprays 5 between the stands and the rolling speed of the mill 1 are so set as to control the outlet side temp. of the steel sheet 2 to 300-600 deg.C in accordance with the measured temp. On the other hand, the tension between the stands is maintained at 2-15kg/cm<2> by controlling the torque setting of an electric looper 7 by a tension control device 6. The problem of a width reduction does not arise even if the tension between the stands is maintained at 2-15kg/cm<2> because the rolling temp. is set relatively low. The considerable reduction of the rolling load is thus made possible and the roll life is extended. |
