| 摘要 |
<p>PURPOSE: To improve precision in controlling plate thickness in the width direction by detecting the position of a steel strip in the width direction and, in accordance with the detected position, deciding the manipulated variable of a device for controlling the thickness in the width direction. CONSTITUTION: A camera 5 for detecting plate position is installed in front of the first stand, normally monitoring the position of a plate. In addition, a thickness meter 4 in the width direction is installed between the first and the second stand, constantly measuring the cross section of a plate in the width direction. On the target of the thickness distribution obtained in the case of agreement between the center position of the plate and that of a work roll shift device 6, if the plate is shifted 20mm to the driving side for example, the thickness on the driving side becomes larger than the target while the thickness on the manipulation side becomes smaller than the target. Under the circumstances, if the upper and lower work roll shift is moved 20mm to the driving side for rolling, the obtained thickness distribution is in agreement with the target thickness both on the driving side and manipulation side. Consequently, generation of shape defect troubles may be prevented which are due to the excessive controlled variable of the work roll shift device 6.</p> |
