| 摘要 |
<p>PURPOSE:To provide a method for joining sheet bars by rolling twist laps by which the sheet bars are firmly joined by rolling on the inlet side of a finishing mill at the time of fully continuous hot rolling. CONSTITUTION:This method is for joining the sheet bars by rolling 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 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 and lapped parts 21 are formed by overlapping these projecting parts 20 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 rolling is executed while pushing the preceding sheet bar 13 with the following sheet bar 12. In this way, the sheet bars are firmly joined by rolling while preventing the gap between the end faces and breaking in the end parts of the sheet bars, joining strength is increased and the productivity of sheet bar rolling is improved.</p> |
