| 摘要 |
PURPOSE:To prevent splash and enlarge the range of weldable current in seam welding overlapped part of a can bulge blank, by AC power source by seam welding to make the welding parameter satisfy a specified expression. CONSTITUTION:In manufacture of a welded can bulge in which overlapped part of a can bulge blank is seam welded by AC power source, seam welding is performed under condition that the welding parameter expressed by W=2FL/V, where F: frequency of welding current, V: welding speed, L: contact arc length, satisfies (n-0.3)<=W<=(n+3), where n: integer. By this way, welding current is cut at or near the nodal part of a temperature curve. Accordingly, no splash is generated and imbricate patterns on the surface of the weld zone is reduced remarkably. |
