| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately control a shape with good response in rolling with thin work rolls by making backup rolls with a combination of variable crown rolls having a single pressure chamber and multiple pressure chambers, approximating the plate shape to the function including the square term and fourth power term of the distance in the plate width direction, and controlling the square term with the crown roll of the single pressure chamber and the fourth power term with the crown roll of multiple pressure chambers. SOLUTION: Work rolls 1a and 1b are thin work rolls whose length/diameter ratio exceeds 4. A backup roll 2a is a variable crown roll having an single pressure chamber. A backup roll 2a is a variable crown roll having multiple pressure chambers. The shape of a plate rolled material 3 is detected with shape detector 11 and the shape of the plate material 3 is detected with a shape detector 11 and the shape is approximately by the function including the square term and the fourth power term. The target shape is similarly approximately by the function including the square term and the fourth power term. The reduction volume of reduction mechanisms 6a and 6b, oil pressure of the backup rolls 2a and 2b, and oil pressure of roll benders 7, 8a, and 8b and the like, are controlled to adjust the shape to the target shape.</p> |
