| 摘要 |
<p>PURPOSE:To obtain a temp. controlling system acting constantly at the optimum responsing speed and to improve the quality of a material to be rolled, by measuring the temp. of the material at the exit of the 3rd stand and controlling the temp. to be a target temp. of the material at the exit of a finish mill by changing the rolling speed. CONSTITUTION:The difference between the temp. theta3 of a material to be rolled at the exit of the 3rd stand detected by a thermometer 22 and the previously set target temp. theta30 of the material at the exit of a finish mill is computed by a comparator 23 to send the resulting temp. deviation DELTAtheta3 to a temp. controlling device 24. The device 24 commputes a correcting quantity of the peripheral speed of the 3rd stand roll in order to make the temp. deviation DELTAtheta3 to zero by using time the constants T1 and T2 determined by an operating device 25, and outputs the results to a adder 21. The speed of all the stand is corrected at the same rate by adding said results outputted to the adder 21 to an output of a main speed setter 20 with the aid of the adder 21, and the temp. theta3 of the material at the exit of the 3rd stand is controlled to be the target temp. theta30 of the material at the exit of the finish mill without disturbing the rolling conditions.</p> |
