Resistance measuring mechanism in a resistance welding machine

Details Resistance measuring mechanism in a resistance welding machine Resistance measuring mechanism in a resistance welding machine

1990-07-27

1991-03-12

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219109, B23K 1125

Patent

active

049994778

ABSTRACT:
There is disclosed a resistance measuring mechanism in a resistance welding machine for calculating a resistance value in an arbitrary portion of the resistance welding machine. The resistance measuring mechanism comprises means for detecting temperature of an exit through which cold water for cooling a cable flows and the temperature of parts of cables, means for detecting voltage at a secondary or a primary winding of a welding transformer and means for detecting welding current at the secondary or the primary winding of the welding transformer characterized in that resistance value at a measuring temperature is calculated by correcting the resultant detected temperature, voltage, welding current for voltage, welding current at a reference temperature.

REFERENCES:
patent: 4647751 (1987-03-01), Yoshimura et al.
patent: 4734640 (1988-03-01), Kitahori et al.

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