| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the rolling efficiency by estimating or detecting the temperature of a work to be rolled at the position on the upstream side of a finish rolling mill, and changing the carrying speed of the work to the finish rolling mill and the rolling speed at a rough rolling mill based on the temperature to regulate the temperature of the work without any oscillation. SOLUTION: The temperature of a work to be rolled by final stand R3 of a rough rolling mill is measured by an R3 inlet side temperature detector, and compared with the set target value. When the measured value is lower than the target value, the rolling is still continued to feed the work into finish rolling mills F1-F7. When the measured value exceeds the upper limit of the target value, the rough rolling and table carrying time is newly operated, and the work is rolled based thereon. Alternatively, in place of this method, the upstream side stand R2 inlet side temperature is measured, and the measured value exceeds the upper limit of the set target temperature, the rolling speed is increased at the upstream side stand R2, and the rolling speed at the final stand R3 is decreased to drop the temperature of the work without changing the rough rolling and carrying time.</p> |
