| 摘要 |
<p>PURPOSE:To improve the quality and yield of a product by comparing a measuring value of the amount of edge drop with its set value and controlling the shifting of a trapezoidal work roll in the sheet-width direction and the operating pressure of a roll bender. CONSTITUTION:At least a work roll 1 at the 1st stand is formed into a trapezoidal work roll by providing a chamfer to its roll end, and is shifted in the sheet width direction by a shifting device. The measured value of the amount of edge drop detected by a thickness gauge 4 is compared with a set value of the target amount of edge drop by a control device 6 used for controlling the amount of edge drop, then the shifting amount of roll 1 in the sheet width direction and the operating pressure of a roll bender, at the 1st stand, are controlled basing on the compared results so that the amount of edge drop of a steel sheet 5 coincides with the target value.</p> |
