Electric heating – Metal heating – For bonding with pressure
Patent
1986-02-03
1987-03-03
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
B23K 1124
Patent
active
046477519
ABSTRACT:
A secondary conductor supervising device of a resistance welder control system for supervising short-circuit, disconnection, and/or deterioration of a secondary conductor by means of a current flowing through a resistance welder, which comprises a voltage detecting circuit for detecting a voltage from the secondary conductor, inclusive of a secondary cable, of the resistance welder, a current detecting circuit for detecting a current flowing through the resistance welder, a divider for dividing the output of the voltage detecting circuit by the output of the current detecting circuit, an average computer for averaging the output of the divider over a part or the whole of a welding period, a supervisory level setting unit for setting a resistance value such as of the secondary conductor, and a comparator for comparing the output of the setting unit with the output of the average computer based on the welding period. A warning output is generated preferably when the number of times at which the comparator provides an output reaches a value preset in a counter.
REFERENCES:
patent: 3546421 (1970-12-01), Meyer et al.
patent: 4577086 (1986-03-01), Needham et al.
Furudate Masato
Yoshimura Katsuo
Dengensha Manufacturing Company Limited
Shaw Clifford C.
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