Electric heating – Metal heating – For bonding with pressure
Patent
1994-07-15
1996-01-16
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
B23K 1110
Patent
active
054849756
ABSTRACT:
A spot welding apparatus comprises a welding gun having a pair of opposing welding electrodes either one of which is movable towards the other to apply a pressure onto a work and away from the other to release the pressure, a servomotor attached to the welding gun for adjusting the pressure applied to the work through movement of the movable welding electrode, a servomotor controller for controlling an operation of the servomotor, a welding current regulator for adjusting a value of welding current applied through the opposing electrodes to the work, a weld-interval timer arranged for adjusting at least one weld time interval and weld timing for the welding current and the pressure both applied to the work, and a spot welding controller electronically connected to the servomotor controller, the welding current regulator and the weld-interval timer, for simultaneously and arbitrarily adjusting a welding condition, namely the welding current, the pressure, the weld time interval and the weld timing, during a cycle of spot welding at every welding point on the work or at one specified welding point on the work.
REFERENCES:
patent: 4484056 (1984-11-01), Rossell
patent: 5138127 (1992-08-01), Fries et al.
patent: 5225647 (1993-07-01), Dufrenne
patent: 5386092 (1995-01-01), Dufrenne
Nissan Motor Co,. Ltd.
Shaw Clifford C.
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