Spot welding apparatus and its power supplying method

Details Spot welding apparatus and its power supplying method Spot welding apparatus and its power supplying method

1995-05-23

1996-10-01

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

B23K 1124

Patent

active

055608426

ABSTRACT:
A spot welder apparatus includes: a single welding power source (5); a welding current distributor (7) connected to the single welding power source; and a plurality of spot welders (1A, 1B, 1C) connected to the welding current distributor. Each of a plurality of the spot welders is activated alternately by welding current distributed by the welding current distributor. When two start signals are generated almost simultaneously, a first spot welder which generates the start signal earlier is activated, and a second spot welder which generates the start signal later is kept under pressurized condition. Immediately after the first spot welder is deactivated, the second spot welder is then activated. The spot welder apparatus is low in cost and small in installation space, without increasing the user' current capacity.

REFERENCES:
patent: 3051825 (1962-08-01), Rockafellow et al.
patent: 3153728 (1964-10-01), Procter
patent: 3422243 (1969-01-01), Meyer
patent: 4985612 (1991-01-01), Izume et al.
patent: 5072090 (1991-12-01), Morita
patent: 5166491 (1992-11-01), Izume et al.
patent: 5171960 (1992-12-01), Takano et al.
patent: 5449876 (1995-09-01), Ko

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