| 摘要 |
In order to make the manufacture of galvanised bar elements (10), for example for space frameworks, more economical, the individual parts of the bar elements (10), namely the hollow bar (11) and the end pieces (12), are galvanised before they are connected. The ring welds between the galvanised parts (11, 12) are made by laser welding. On account of the high energy density of the laser welding beam and the narrow ring welds (18) formed in the process, a zinc coating (24) fed by the zinc coatings (22) of the adjacent parts (11, 12) forms across each ring-weld surface (25) in the course of the welding operation, so that, after the welding operations, the bar element (10) is also provided with an anti-corrosion zinc coating (24) over the ring-weld surfaces (25). <IMAGE> |
