Seam welding machine

Details Seam welding machine Seam welding machine

1985-08-09

1987-06-30

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 64, B23K 1106, B23K 1132

Patent

active

046772723

ABSTRACT:
A seam welding machine capable of producing a uniform welding bead quality along the seam of cylindrical articles to be welded such as cans and the like. Commercial AC power is full-wave rectified and then passed through an inverter to produce a relatively high-frequency AC output current. The AC output current is applied through a center-tapped secondary transformer to a rectifier circuit, and thence through a smoothing circuit composed of a reactor and a capacitor to a pair of rotary electrodes. A detector senses when end portions of article to be welded are near the electrodes, and controls the AC power source so as to reduce the welding current at the times when the end portions of the articles to be welded are passing the rotary electrodes.

REFERENCES:
patent: 3584178 (1971-06-01), Huber et al.
patent: 3632949 (1972-01-01), Thorne
patent: 4554430 (1985-11-01), Belamaric

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