PURPOSE: To easily form the sound flat bead with a small number of pass, by pointing the arc at fillet corner part in arc starting time and moving the arc aiming position from the corner part to the horizontal basic material after the arc is stabilized, at the time of carrying out fillet weld.
CONSTITUTION: On occasion of carrying out MIG welding of the horizontal fillet corner zone A formed b7 the vertical basic material 1 and the horizontal basic material 2, arc generated from the welding wire 3 by comparatively low heat input at starting time, is pointed at the zone A. When sufficient penetration is carried out at the corner zone and the arc is stablized and then, the molten pool 5 is made large and moreover, heat is accumulated sufficiently, quantity of heat input is increased and pointing direction of the arc is moved in the direction of the material 2 at 2W6cm and then, welding is continued toward the point B. Direction of the arc is nearly crossed at right angles against the direction of the material 1 looking from above. Sound flat bead is formed easily with a small number of pass unnecessary to rock welding torch.
KAKEYA YASUO
SAITOU TAKASHI
