23
Section 3 Operation
DOUBLE J-GROOVE
V-GROOVE (60-80
°)
DOUBLE V-GROOVE
DOUBLE U-GROOVE
U-GROOVE
BEVEL GROOVE
DOUBLE BEVEL GROOVE
J-GROOVE
JOINT PREPARATION
Besides a butt joint and lap joint which are often used for
thinner metal gauges, consider using one of these groove
joints for best welding results. When grinding or cutting the
bevels, especially with a single V
-
groove, it may be beneficial
to leave a small land with a gap between the joint to achieve
full penetration. In this case a temporary backer plate can be
used to support the bottom of the weld to create the root
pass. The root weld will weld the backer to the main plate.
This backer can later be ground or cut off. However, in many
cases a plain open root can be used as a backer plate adds to
the time and labor involved. A knife edge is also acceptable
so long as the joint is fully penetrated when the weld is com-
pleted. Open root gaps without a backer can range from
1/16”
to
1/8”
depending upon wire diameter and application
.
≥ 1/4” Fillet
≥ 1/4” Fillet
s
≥ 1/4” V Joint
≥ 1/4” Butt
NOTICE:
When welding material
1/4”
and over be careful about trying to put too much metal down in a single pass.
Use multiple passes to complete the weld along with any necessary joint preparation especially with wires of
smaller diameter. As metal thickness goes up so does the number of required passes. Depending upon the
filler diameter and power settings used, a
1/4”
joint may only require 1 or 2 passes, but a
3/8”
joint in plate
metal or pipe will require not only beveling but 4 to 6 overlapping weld passes including a cap and root pass.
Summary of Contents for ULTRA-ARC 205
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