| 摘要 |
<p>PURPOSE:To prevent occurrence of camber by obtaining a difference between a calculated and a measured values of the difference between the right and left plate thicknesses at the (i) path, obtaining an estimated value by correcting a calculated difference between the right and left plate thicknesses at the (i+1) path based on the obtained difference at the (i) path, and adjusting a screw down position based on the difference between the estimated value and the target value. CONSTITUTION:When the stop end of a plate 16 is detected by a device 32 at the (i) path, a wedge calculating device 36 calculates the wedge of the plate 16 based on rolling loads PW and PD detected by load cells 22A and 22B and screw down positions SW and SD detected by detectors 26A and 26B. A right and a left plate thickness are measured by a thickness gage 30 to obtain a measured wedge. And then, a device 40 calculates a wedge corrective value at the (i+1) path based on the measured and the calculated wedge. The target wedge is also calculated. The rolling load and the screw down position are detected at the (i+1) path and the device 40 calculates an estimated wedge value. Then, a difference between a right and a left screw down position is obtained and is inputted into a hydraulic screwdown device 14. The device 14 controls the hydraulic cylinder, changes a roll opening difference of a rolling mill, bring the wedge of the plate 16 to be closer to the target value, and corrects a chamber of the plate 16.</p> |
