19 Fillet
Welding Two factors
- positioning of the welding wire and the shape of the weld reinforcement - are
especially important
in fillet welding. The effect of these variables is shown in Figure 36. In general,
fillet welding requires
slightly lower speeds and lower voltages than butt welding with the same welding
current. Result:Undercutting
of weld (caused
by wire misalignment).
FILLET WELDS JOINTS
POSITIONED 450
TO HORIZONTAL
BOTH MEM- BERS
1-IN. THICK CORRECT
IMPROPER WELD
POSITION CONCAVE
REINFORCEMENT
Welding wire perpendicular
to direction of travel and
aligned with fillet corner.
1050 Amp, 33 volt, 11 ipm.
Result:Good weld, convex
reinforcement, no
undercutting.
Welding wire perpendicular
to direction of
travel and aligned
5/32-in. towards 1050
Amp, 36 volts, 11.5 ipm FIG. 36
- Effect of Wire Position and Reinforcement Shape in Fillet Welds
Result:Increased voltage
caused spread-out, concave
reinforcement, resulting in
cracking.
