Electric heating – Metal heating – For bonding with pressure
Patent
1976-04-05
1978-09-26
Truhe, J. V.
Electric heating
Metal heating
For bonding with pressure
307252M, B23K 920
Patent
active
041172981
ABSTRACT:
An electronic control unit is disclosed for a stud welding device having a movable electrode mounted on a solenoid armature, for moving the electrode away from the workpiece. The control includes a timing circuit providing a plurality of timer outputs in accordance with the preselected time intervals. A pilot arc circuit and an electrode movement circuit connected to the solenoid are activated by a timer output for establishing a pilot arc between the electrode and the workpiece and for moving the electrode from the workpiece. A welding power circuit is activated by another one of the plurality of timer outputs to establish welding current between the electrode and the workpiece. The electrode movement circuit is deactivated by another one of the plurality of timer outputs to enable the electrode to contact the workpiece by the urging of a spring. Means are provided for terminating the welding current. The control is suitable for use in a direct current welding power circuit.
REFERENCES:
patent: 3162747 (1964-12-01), Netzsch
patent: 3346715 (1967-10-01), Jenkins
patent: 3414700 (1968-12-01), Glorioso
patent: 3519787 (1970-07-01), Kroy
patent: 3564294 (1971-02-01), Balchin
patent: 3932724 (1976-01-01), Raycher
patent: 3999034 (1976-12-01), Barhorst
Shaw Clifford C.
Tru-Fit Products Corporation
Truhe J. V.
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