Resistance welding method and apparatus used in the method

Details Resistance welding method and apparatus used in the method Resistance welding method and apparatus used in the method

1998-06-11

1999-10-26

Mills, Gregory

Electric heating

Metal heating

Wire, rod, or bar bonding

219 58, 219 911, B23K 1124

Patent

active

059732873

ABSTRACT:
A resistance welding apparatus in which welding portions of materials to be welded are resistance-welded with each other by use of resistance heating caused by conduction of a welding current while the welding portions are pressed between a pair of electrodes, characterized in that the apparatus comprises: a welding transformer for supplying the welding current; a welding timer for controlling the current-conduction time of the welding current; a width measurement unit for measuring the welding width of the welding portions; an arithmetic operation unit for reversely calculating the reference welding height of the welding portions from the welding width measured by the width measurement unit on the basis of a predetermined reference welding sectional area of the welding portions; a height detection unit for detecting whether the height of the welding portion has reached the reference welding height or not; and an interface for controlling the welding timer to stop conduction of the welding current when the reference welding height of the welding portion is detected by the height detection unit.

REFERENCES:
patent: 3352994 (1967-11-01), Merchant
patent: 3876854 (1975-04-01), Andrew et al.
patent: 4922072 (1990-05-01), Topel et al.
patent: 5645738 (1997-07-01), Cecil
patent: 5808260 (1998-09-01), Asakura et al.

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