Seam welding apparatus

Details Seam welding apparatus Seam welding apparatus

2006-04-04

2006-04-04

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

For bonding with pressure

Reexamination Certificate

active

07022933

ABSTRACT:
A seam welding apparatus enables, even when metallic sheets are arranged in a line in a short distance, the welding electrodes to come into contact only with the metallic sheet to be welded, so as to provide a reliable welding of the metallic sheets to form connected portions having high strength. The roller electrode20, which has on its outer peripheral portion the conical electrode surface21, is supported by the central axis inclined relative to the surface of the metallic sheet50to be welded, and there is provided the stationary electrode30in which the portion including the flat electrode surface31has the smaller thickness. The electrode surface21of the roller electrode20is brought into contact with the surface of one of the metallic sheets50to be welded, while bringing the electrode surface31of the stationary electrode30into contact with the surface of the other metallic sheet50. It is possible to prevent interference of the roller electrode20and the stationary electrode30with the metallic sheet50, which is not currently subjected to the welding, and to hold firmly the metallic sheet50to be welded by the roller electrode20and the stationary electrode30to perform the seam welding.

REFERENCES:
patent: 2263038 (1941-11-01), Heim
patent: 3702022 (1972-11-01), Duke et al.
patent: 3881083 (1975-04-01), Bromley
patent: 4688631 (1987-08-01), Peze et al.
patent: 0235721 (1987-09-01), None

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