| 摘要 |
<p>PURPOSE:To improve yield at the time of continuously rolling while welding metallic strips including a weld zone. CONSTITUTION:The metallic strips 1 which are uncoiled from plural pay-off reels 2, 3 are welded at the rear end of a preceding metallic and the tip of the succeeding metallic strip with a welding device 4. When the arrival of a welded part is detected with a weld zone detector 8, rolling with rolling mills 11, 12, 13, 14 is changed to a continuous rolling mode or a sequential rolling mode according to the differences in material, width and thickness of the preceding and succeeding metallic strips, given from a schedule setting device 15, with a controller 7. When the difference between the preceding and succeeding metallic strips is larger than the reference value, only the rolling mills 11-14 at which the welded part arrive are opened and changed to the sequential rolling mode in which the welded parts are passed through one by one. When the difference is smaller than the reference value, the welded parts are also continuously rolled.</p> |
