Kabel-und Metallwerke Gutehoffnungshuette Ag

Gert Nordmann

Harold Roderburg

Apparatus for welding adjacent longitudinal edges of a thin flat workpiece being formed into a tubular configuration is disclosed as comprising a single welding head and an associated welding head bracket including pivot means and vertical adjustment means for selectively positioning the welding head above the moving workpiece. The single welding head includes three welding electrodes having their welding tips disposed in spaced linear arrangement in the direction of the moving workpiece, and being adapted to individually receive electric power for the generation of separate welding arcs. Associated with each of two of the three welding electrodes is a tilt adjustment means for individually adjusting the alignment of such two electrodes during welding operation so that the welding baths created by such two said welding electrodes overlap the welding bath created by the centrally positioned third electrode. The single welding head is configured to be closely disposed to the output side of a forming station for the thin flat workpiece so that the seam of the tubular configuration formed may be welded prior to seam separation due to material resilience.

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Hannover, Germany

Gert Nordmann