| 摘要 |
In an apparatus for the butt welding of hollow molding of aluminum with two contact clamps (4, 5), movable toward each other, for the ends of the moldings to be joined together, one contact clamp (4) is fixed at the machine frame, and the other contact clamp (5) is arranged on a table (3) supported at the machine frame (18) by way of two parallelogram guide arm pairs (19, 20). Trough-like recesses (15) are provided in the mutually opposing end faces of the contact clamps (4, 5), a conduit for the feeding of protective gas during the welding operation terminating in the zone between the contact clamps (4, 5). |
