Monitoring facility for electric welding equipment, in particula

Details Monitoring facility for electric welding equipment, in particula Monitoring facility for electric welding equipment, in particula

1987-06-15

1987-12-22

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 81, B23K 1124

Patent

active

047148160

ABSTRACT:
The invention relates to the art field of resistance welding utilizing rollers in conjunction with a continuous copper wire electrode and effected with welding current that remains constant on average, at least within each half-period. According to the invention, the weld between members (generally tinned metal strip) can be monitored by measuring the current that flows through the circuit created by the electrode wire, this being a function of the welding resistance that registers between the welding rollers; the value of the current thus measured is compensated in respect of the inductive effects produced by the magnetic field originating from the welding current, and relayed in digital form to a microprocessor that compares it with given maximum and minimum limits within which the reading must fall for quality of the weld to be assured.

REFERENCES:
patent: 2486552 (1949-11-01), Callender
patent: 2508330 (1950-05-01), Callender et al.
patent: 4376884 (1983-03-01), Gold et al.

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