| 摘要 |
<p>PURPOSE:To easily and surely detect a joined part on a high speed continuous rolling line by forming a hole at an unjoined part of part of a butted surface between preceding and succeeding materials. CONSTITUTION:The unjoined part 13 is formed near the center of a butted joined part 12 between the rear end of the preceding material 11 and the top and of the succeeding material 10. When the bar is rolled by a finish rolling machine, the unjoined part 13 is magnified to take the shape of a hole 14. This hole 14 can be distinguished easily from other parts, and since the position of the hole, itself is the joined part, no complicated calculation is required to detect the joined part as in the conventional way and an accurate detection free from an effect by a measuring error can be obtained. Since the rolled material does not extend as far as a splitting shear arranged on the downstream side of the line, the time and distance necessary for the joined part to reach the splitting shear are indicated by a simple relation and calculated accurately, the splitting shear is driven according to the calculated result and can be shorn accurately.</p> |
