Electric heating – Metal heating – For bonding with pressure
Patent
1979-04-10
1981-10-20
Shaw, C. C.
Electric heating
Metal heating
For bonding with pressure
B23K 1104
Patent
active
042963052
ABSTRACT:
A machine for continuous flash butt welding comprises control devices for the control of beginning-of-upset operation and upset value, respectively, and such control devices are provided in one unit (a computer). Also provided are a control device for automatically controlling the flashing-off speed and a welding current meter connected to a welding transformer. A sensor connected to the meter detects short-circuit duration in the welding circuit in response to outputs of a welding control enabling signal generator actuated at the final stage of flashing and in the course of upsetting. The inputs of the latter are coupled to the computer and the output is connected to an upset value deviation control circuit. The latter receives inputs from a circuit which detects slippage of the parts in the clamping jaws during welding. The upset value deviation control circuit is further connected to a sensor means for detecting misalignment of a rod of the follow-up slide valve relative to its body.
REFERENCES:
patent: 3612811 (1971-10-01), Lifshits et al.
patent: 3681563 (1972-08-01), Lifshits et al.
patent: 3748431 (1973-07-01), Melbard et al.
patent: 3790739 (1974-02-01), Lifshits et al.
Andrianov Vladimir R.
Grabchev Boris L.
Krivonos Vadim P.
Lifshits Viktor S.
Podola Nikolai V.
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