Direct-current arc welding machine having current control for pr

Details Direct-current arc welding machine having current control for pr Direct-current arc welding machine having current control for pr

1982-06-03

1984-10-09

Shaw, C. C.

Electric heating

Metal heating

By arc

219137PS, B23K 910

Patent

active

044763760

ABSTRACT:
A DC welding device is provided with an adder which sums the signals from a base current setting circuit and a shorting current setting circuit and applies the same to a welding current control unit. When a short circuit occurs, the shorting current circuit outputs a gradually increasing signal until the short is removed, whereupon a gradually decreasing signal, which reaches zero after a predetermined time, is output.

REFERENCES:
patent: 3792225 (1974-02-01), Needham et al.
patent: 3928746 (1975-12-01), Ericsson
patent: 3961154 (1976-06-01), Ericsson
patent: 4349720 (1982-09-01), Makimaa

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