Fixed point welding gun

Details Fixed point welding gun Fixed point welding gun

1992-06-12

1993-10-12

Evans, Geoffrey S.

Electric heating

Metal heating

For bonding with pressure

219 89, 219 90, B23K 1110

Patent

active

052528014

ABSTRACT:
A resistance welding gun which is adapted to prevent asymmetrical impacting of two or more metal sheets to be welded. The resistance welding gun includes a pair of rotatably connected arms, each of which has a corresponding working end and actuation end. An electrode tip is located at each working end to provide a pair of opposed welding electrodes, while a cylinder is attached to the actuation ends of the arms to provide rotation therebetween. Between the actuation ends there is provided an equalizing mechanism including a crank and a pair of linkages which serve to equalize the movement of the arms about their pivot. In cooperation with the pivot of the arms, the crank establishes a fixed or datum point at which the electrode tips of the resistance welding gun are targeted such that, when properly positioned on opposite sides of the metal sheets, the electrode tips contact the metal sheets substantially simultaneously and apply substantially equal forces to the opposite sides of the metal sheets. As a result, the equalizing mechanism substantially prevents unilateral contacting and asymmetrical impacting by the electrode tips on the metal sheets.

REFERENCES:
patent: 1980228 (1934-11-01), Rogers
patent: 4771160 (1988-09-01), Pitsch et al.
patent: 5036175 (1991-07-01), Umeda
patent: 5099099 (1992-03-01), Saito

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