| 摘要 |
PURPOSE:To form a groove having extremely high accuracy by superposing the ends of a preceding sheet and succeeding sheet, machining and cutting the ends and butting the cut face of the preceding sheet to the succeeding sheet which is held by magnetic force. CONSTITUTION:Opposed ends 1a, 1a' of the preceding sheet 1 and the succeeding sheet 1' are superposed and are held by upper clamping pieces 3, 3', lower clamping pieces 2, 2' and a moving clamp 6 to which the magnetic force acts. The ends are then cut by a rotary abrasive grain cutting body 4. Upper clamps 3, 3' are thereafter raised and after scrap is removed, the cut face of the preceding sheet 1 is butted to the cut face of the succeeding sheet 1' which is held by the magnetic force. Then, the extremely precise groove is formed even with the strips which are as thin as 0.1-0.5mm thickness and as broad as 500-1,500mm width. The satisfactory laser beam welding is thus executed. |
