Large plate arc welder

Details Large plate arc welder Large plate arc welder

1983-09-28

1985-10-29

Albritton, C. L.

Electric heating

Metal heating

Work holders

219 732, 219136, B23K 902

Patent

active

045502447

ABSTRACT:
A submerged arc welding machine in which the edges of plates to be butt welded are supported on a channel fixed on a long rigid foundation beam. The plates are otherwise held on inverted caster wheel assemblies. A long rigid bridge spaced above the beam carries a track on which the arc welding apparatus carriage rides. The plate edge portions are held by vertically movable electromagnets, and the channel forms a magnetic shield so that the magnets do not affect the welding arc. Vertically movable rollers allow the plates to be positioned without interference from the channel. A copper backup bar in the channel has a groove that is filled with flux, and the bar is raised to hold the flux under the weld line. A shoe on the carriage lays flux in the groove when the carriage returns after a welding pass, and a vacuum pickup head cleans the groove for the shoe flux delivery. During the welding pass, the pickup head removes flux on opposite sides of the weld.

REFERENCES:
patent: 3122118 (1964-02-01), Cooper
patent: 3517155 (1970-06-01), Mantel et al.
patent: 3525844 (1970-08-01), Johnson
patent: 4063059 (1977-12-01), Brolund et al.
patent: 4342897 (1982-08-01), Murai et al.

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