Spot welding apparatus

Details Spot welding apparatus Spot welding apparatus

2006-08-08

2006-08-08

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

For bonding with pressure

Reexamination Certificate

active

07087854

ABSTRACT:
A spot welding apparatus for spot welding superposed workpieces by putting the superposed workpieces3, 4between a pair of electrodes1, 2and applying a welding current between the electrodes under application of pressure, the apparatus having heating coils15wound on each of the electrodes1, 2,and being provided with high frequency heating means17for induction-heating welding portions of the workpieces contacted by the electrodes. The spot welding apparatus is capable of firmly spot welding workpieces made of high tension steel even if there is opening between the workpieces.

REFERENCES:
patent: 2205425 (1940-06-01), Leonard Jr.
patent: 3592998 (1971-07-01), Derclaye
patent: 3659074 (1972-04-01), Friess
patent: 4804819 (1989-02-01), Farrow
patent: 6265701 (2001-07-01), Bickel et al.

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