Resistance welding

Details Resistance welding Resistance welding

1976-11-01

1978-03-14

Truhe, J. V.

Electric heating

Metal heating

For bonding with pressure

2191171, B23K 1124

Patent

active

040792269

ABSTRACT:
A method of controlling the duration of a resistance weld in which a preprogrammed AC current is fed to welding electrodes, the program including an abrupt increase in welding current after a predetermined number of cycles so that the weld duration can be extended into the high amplitude portion if the heat input has been insufficient. The voltage across the welding electrodes is monitored, the peak voltage detected, a reference voltage derived by dropping the peak voltage 2 - 20% and the weld terminated when the subsequent peaks fall to the reference voltage.

REFERENCES:
patent: 2472042 (1949-05-01), Davies
patent: 3422243 (1969-01-01), Meyer
patent: 3575572 (1971-04-01), Levinge
patent: 3800119 (1974-03-01), Kuroda et al.

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