| 摘要 |
<p>PURPOSE:To obtain an adequate quantity of edging of a vertical rolling mill in hot rolling of steel plate by setting a quantity of edging of a finish rolling mill by an actual plate width and the target crown value of a finished plate in a rough rolling mill. CONSTITUTION:Slab advances to a winder 7 through a vertical rolling mill 1 for making uniform width, a group of rough rolling mills 2 and a group of finishing rolling mils 3. Edgers ER, EF and width measuring machines 4-6 are arranged adequately. In an arithmetic unit 8 for an unfinished surface target, a quantity of edging of a group of finish rolling mills, DELTAE is set to an adequate value within the limit of edging capacity to establish an unfinished surface target width WRA through arithmetic operations. In a group of rough rolling mills 2, width control is carried out applying this WRA to the target. After rolling in the group of rough rolling mills 2, the actual width of an unfinished surface WR<.> is measured by a roughened surface width measuring machine 4, then, arithmetic operations are performed in an arithmetic unit for the finished surface target width, 11 to determine DELTAE and to control the width in the group of finish rolling mills. In this manner it is possible to control the finished plate width based on correct estimate of performance of plate width in the group of finish rolling mills.</p> |
