Electric heating – Metal heating – For bonding with pressure
Patent
1975-10-14
1977-08-23
Truhe, J. V.
Electric heating
Metal heating
For bonding with pressure
219 97, 219101, 219104, B23K 1104
Patent
active
040442195
ABSTRACT:
A method for controlling flashing speed during resistance butt welding comprises measuring values of current density for at least two joints between parts being welded, converting them into d-c. voltages, detecting a maximum voltage value, comparing it to a preset d-c. voltage, the resultant difference value being used as flashing speed control parameter. An apparatus for carrying out the method comprises electric circuits whose number is equal to the number of joints being welded. Each circuit comprises a welding transformer and a circuit for conversion of flashing current density into d-c. voltage. A maximum signal detector comprises circuits for conversion of current density into d-c. voltages, whose number is equal to the number of joints being welded. The detector output is connected to the circuit for comparing a current voltage value to the preset one. The apparatus according to the invention may be used mainly for controlling flashing speed during concurrent resistance butt welding of several joints of large and different respective cross-sectional areas.
REFERENCES:
patent: 3151290 (1964-09-01), Riley et al.
patent: 3296409 (1967-01-01), Schwartz
patent: 3335257 (1967-08-01), Sakharnov et al.
patent: 3748431 (1973-07-01), Melbard et al.
John J. D'Azzo et al., Feedback Control System Analysis & Synthesis, 1960, pp. 404-407.
V. G. Krivenko et al., "A Drive Motor Speed Regulator for Flash Welding Machines", Avt. Svarka, 1972, No. 1, p. 75.
Chernenko Ivan Alexeevich
Entin Yakov Borisovich
Filippov Alexandr Nikolaevich
Kuchuk-Yatsenko Sergei Ivanovich
Lebedev Vladimir Konstantinovich
Shaw Clifford C.
Truhe J. V.
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