| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately control the width of a steel strip. SOLUTION: In the method for controlling the width of a cold strip by using a pickling and hot rolling combined system which is provided with hot-rolling means provided with a 1st width measuring means, a tension leveler 7 for imparting vending deformation to the steel strip under tension, a 2nd width measuring means 8 arranged on the outlet side of the tension leveler 7, a pickling means arranged on the downstream side of the 2nd width measuring means 8 and a cold-rolling means arranged on the downstream side of the pickling means, the minimum width Wmin in a coil is specified by the cold-rolling means, a target width Wt on the outlet side of the tension leveler is set based on the minimum width Wmin and a target width Wc in the cold-rolling means and elongation is adjusted so that the actual value of the width which is measured by the 1st width measuring means is matched with the target width Wt in the tension leveler 7, then the tension is set so that the decrement of the width becomes (Wt-Wc) in the cold-rolling means.</p> |
