| 摘要 |
<p>PURPOSE:To provide a method for joining sheet bars by forging twist laps by which the sheet bars are firmly joined by rolling on the inlet side of a finishing mill at the time of executing fully continuous hot rolling. CONSTITUTION:This method is for joining the sheet bars by forging the twist laps. At the time of joining the sheet bars in the fully continuous hot rolling, projecting parts 20 are provided in the vicinity of the end parts in the width direction of at least either of the rear end part of a preceding sheet bar 13 and tip part of the following sheet bar 12, lapped parts 21 are formed by overlapping these projecting parts on the other sheet bar, the rear end part of the preceding sheet bar 13 and tip part of the following sheet bar 12 are butted and brought into tight contact, and, after joining the lapped parts 21 by forging and reducing them in the thickness direction, the sheet bars are rolled while pushing the preceding sheet bar with the following sheet bar. In this way, the gap between the end faces and breaking in the end parts of the sheet bars are prevented, the sheet bars are firmly joined by rolling, joining strength is increased and the productivity of sheet bar rolling is improved.</p> |
