High speed carbon dioxide gas welding method

Details High speed carbon dioxide gas welding method High speed carbon dioxide gas welding method

2005-03-29

2005-03-29

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

By arc

C219S130500

Reexamination Certificate

active

06872915

ABSTRACT:
An arc welding method which suppresses sputtering and which makes it possible to obtain a smooth bead penetration surface shape as in MIG or MAG welding, without producing undercuts or bumping beads. A carbon dioxide gas welding method effecting welding at welding rates of about not less than 1.5 m/minute using a consumable electrode and a welding power source having a control means for opening a short circuit at a rate of at least about 500 A/msec on detection of such short circuit, wherein welding is effected with a proper volume of globules under the welding conditions obtained by computing a welding voltage corresponding to the proper volume of globules by a first formula representing the relationship between the welding wire feed rate, the welding voltage and the volume of globules traveling to a pond of weld as the welding wire is melting and a second formula representing the relationship between the wire feed rate, the welding voltage, and the period of globules traveling to a pond of weld as the welding wire is melting.

REFERENCES:
patent: 4889969 (1989-12-01), Kawai et al.
patent: 5095191 (1992-03-01), Bushey et al.
patent: 63-20183 (1988-01-01), None
patent: 3-193269 (1991-08-01), None
patent: 2000-317677 (2000-11-01), None

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