| 摘要 |
This aims to provide a welder optimum for use in rolling a sheet, and a rolling method including the most advantageous procedure for the welding operation and the subsequent separation of a leader strip. The rolling facility welder (10) performs a series welding operation with a back bar disposed below a pass line and a welding gun disposed over the pass line, thereby to weld a plurality of points simultaneously. The rolling method joints a leader portion (L) held in an exit welder (4) and the tip of a rolled sheet (A) by the spot welder (10), and the rolled sheet (A) is finished in a pass of an even number toward an entrance winder (3).
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