Welding method in the overhead and vertical positions

Details Welding method in the overhead and vertical positions Welding method in the overhead and vertical positions

1997-09-24

1999-08-03

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219126, B23K 908

Patent

active

059321210

ABSTRACT:
The object of this invention is to prevent a defect which occurs in overhead or vertical welding when gravity causes molten metal to drip downward so that the top of the gap has an undercut and the bead has a bulge along the weld line (i.e., a convex bead is created). During overhead or vertical welding, a unidirectional current is made to flow in the molten pool in the direction of the weld line. When the aforesaid current flows in conjunction with a magnetic field, a Lorentz force is exerted in the molten pool in an upward direction towards the upper top side of the groove. This prevents the molten metal from dripping downward and improves the shape of the bead.

REFERENCES:
patent: 1914518 (1933-06-01), Martin
patent: 4190760 (1980-02-01), Kano et al.

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