Short circuit transfer arc welding machine

Details Short circuit transfer arc welding machine Short circuit transfer arc welding machine

1982-04-08

1984-11-27

Shaw, C. C.

Electric heating

Metal heating

By arc

21913033, 21913051, 219137PS, B23K 909

Patent

active

044852932

ABSTRACT:
A short circuit transfer arc welding machine including a wire electrode which is fed towards a base metal, a DC source for applying a voltage across the base metal and the wire electrode, a switching element for interrupting the voltage, a voltage detector for detecting a voltage developed across the base metal and the wire electrode, a first comparator for determining when a detection voltage outputted by the voltage detector reaches a voltage value corresponding to the short circuiting of the base metal and wire electrode, a second comparator for determining when the detection voltage of said voltage detector reaches an arc discharge voltage, and a switching element control circuit for closing the switching element in response to a signal from the first comparator and for opening the switching element in response to a signal from the second comparator.

REFERENCES:
patent: 3349219 (1967-10-01), Ramsey
patent: 3792225 (1974-02-01), Needham et al.
patent: 3809853 (1974-05-01), Manz
patent: 4000374 (1976-12-01), DeKeyser
patent: 4300035 (1981-11-01), Johansson
patent: 4301355 (1981-11-01), Kimbrough et al.

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