| 摘要 |
<p>PURPOSE: To enhance precision for controlling a plate width by comparing a width measurement with the opening degree of a vertical roll at the time of edging, calculating the zero point error of such opening degree and thereby correcting the setting value of the opening degree for the next rolling pass. CONSTITUTION: An edging control is performed on a rolling stock S by a vertical rolling mill 2, and a horizontal rolling is performed by a roughing mill 1. The width of a section of the rolling stock S is measured by a width meter 7 on the upstream side, and the average value W is determined by an arithmetic and control unit 8 for the opening degree of a vertical roll. While tracking is performed on the same section of the rolling stock S, edging is performed with a specific low load; the opening degree of the vertical roll 2a, 2a is measured by a position sensor 9; and the average value E is computed by the arithmetic and control unit 8. A zero point errorδ=W-E is computed. Rolling is performed by the use of that opening degree of the vertical roll which is corrected with the zero point errorδ. The precision of the plate width is enhanced since the zero point error of the vertical roll 2a is calculated on line and reflected in the subsequent setting of the opening degree of the vertical roll 2a.</p> |
