Methods and apparatus for electric resistance welding

Details Methods and apparatus for electric resistance welding Methods and apparatus for electric resistance welding

1986-07-29

1988-12-13

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 5621, 219 5622, 219 8623, 219 8633, B23K 1100

Patent

active

047912650

ABSTRACT:
An electric resistance welder comprises a frame and a movable arm mounted to the frame for gravitational movement relative thereto. A movable electrode is carried at an end of the movable arm. A stationary electrode is spaced opposite the movable electrode to accommodate a plurality of workpieces therebetween, with the movable electrode resting against the workpieces and gravitationally biased toward the stationary electrode. An electric pulse is conducted through the electrodes and workpieces for heating and softening the workpieces to enable the arm to accelerate toward the stationary electrode at the acceleration of gravity, whereby the movable electrode collapses the workpieces toward one another. A stop is arranged to be engaged by the arm for terminating travel of the arm when the movable electrode has traveled a predetermined distance toward the stationary electrode, and subsequent to termination of the electric pulse. Such a technique is highly suited toward the welding of a ball to a wire, the ball and wire having diameters no greater than 0.04 inches.

REFERENCES:
patent: 3045103 (1962-07-01), Warner
patent: 3674976 (1972-07-01), Bitko
patent: 4510370 (1985-04-01), Szantho et al.
patent: 4609802 (1986-09-01), Sotonyi et al.

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