Method for longitudinally seam-welding pipe-blank for welded ste

Details Method for longitudinally seam-welding pipe-blank for welded ste Method for longitudinally seam-welding pipe-blank for welded ste

1977-02-24

1978-08-29

Goldberg, E. A.

Electric heating

Metal heating

Of cylinders

219123, B23K 908

Patent

active

041105893

ABSTRACT:
In longitudinally seam-welding a pipe-blank for welded steel pipe from the inside along a groove by the reverse-polarity GMA welding process comprising using direct electric current supplied to a consumable electrode through a cable as the welding current with said consumable electrode as the anode, the direction of said direct electric current for welding flowing through said cable introduced into said pipe-blank is set in the same direction as that of welding, thereby preventing occurrence of a magnetic arc blow of the welding arc from said consumable electrode toward the upstream side of the welding direction, i.e., in the opposite direction to that of welding.

REFERENCES:
patent: 1826355 (1931-10-01), Lincoln
patent: 2702846 (1955-02-01), Breymeier
patent: 2745934 (1956-05-01), Curtin et al.
Jennings "Magnetic Arc Blow" in the Welding Journal 10/41, p. 427s.
Holt "Methods of Controlling Arc Blow" in Welding Engineer 3/32.

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