Spot welding apparatus

Details Spot welding apparatus Spot welding apparatus

1997-06-24

1999-02-02

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 9121, B23K 1124

Patent

active

058668683

ABSTRACT:
An object to the invention is to narrow the region burned by the preheating current at the spot welding. Structure is provided for allowing conventional welding current to be flowed between a first welding electrode tip and a contact member intermittently via an electronic switch until a predetermined current starts to flow between a first welding electrode tip and a second welding electrode tip.

REFERENCES:
patent: 3538293 (1970-11-01), Procacino
patent: 4072843 (1978-02-01), Szabo
patent: 4675494 (1987-06-01), Dilay
patent: 5272306 (1993-12-01), Hirane

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