| 摘要 |
<p>PURPOSE:To control the dimensions of rolling materials with high accuracy when bar steel is rolled with a rolling mill equipped with both vertical and horizontal rolls, by changing the combination of roll clearance control and roll speed control for each dimension controlling direction. CONSTITUTION:When a rolling material 1 is rolled in a 4-stand continuous rolling line composed of vertical rolls V1 and V2 and horizontal rolls H1 and H2, the dimension in the vertical direction DH of the material 1 is detected by means of a meter 2 for vertical dimension and the value is compared with a reference dimension DHR in the vertical direction by means of a deviation operator 3 and a deviation DH is found, and then, the dimension DH is inputted into a monitor rolling reduction control device 4 and a reference oiling location HYDR is obtained. The reference oiling location HYDR is inputted into the hydraulic rolling down device 5 of the horizontal rolls. Similarly, the dimensional deviation DELTADW of the dimension DW in the right-left direction of the material 1 is inputted into a monitor speed control device 8 and a correcting value for the speed of the vertical roll V2 is obtained and inputted into the vertical roll. The vertical dimension of the material 1 is controlled by controlling the tension between the horizontal rolls by the rolling reduction of the horizontal roll H2 and the horizontal dimension is controlled by controlling the tension between the vertical rolls by the speed control of the roll V2, and thus, the dimensional accuracy of the material 1 is improved.</p> |
