17
Operating Instructions
2.
Horizontal position:
This position prevents the weld
puddle from running downward while allowing slower
rates of travel speed. For this position, angle B should be
about 30 degrees downward from being perpendicular to
the workpiece (fig V).
fig V
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3.
Vertical position:
The torch can be easily pulled from
top to bottom in this position, though it is difficult to
prevent the puddle from running downward. Pushing the
torch from bottom to top provides better puddle control
and allows slower rates of travel speed to achieve deeper
penetration. For this position, angle B should be zero and
angle A will vary from 45 to 60 degrees to provide better
puddle control (fig W).
fig W
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4.
Overhead position:
This is the most difficult welding
position. For this position, angle A should be maintained
at 60 degrees. Maintaining this angle will reduce falling
of molten metal into the nozzle (fig X). Angle B should be
zero degrees so that the wire is aiming directly into the
weld joint. If excessive dripping of the weld puddle occurs,
select a lower heat setting.
fig X
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6.7 Multiple pass welding
•
Butt weld joint:
When butt welding thicker materials,
prepare the edges of the material to be joined by grinding a
bevel on the edges of the metal pieces being joined. When
this is done, a "V" is created between the two metal pieces.
In most cases, more than one pass or bead will need to be
laid into the joint to close the "V" (fig Y).
fig Y
1
2
1
1
2 3
First or
Root Pass
Second
Pass
Third
Pass
Finished
Weld
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Note:
When using a self-shielding flux-core wire, it is
necessary to thoroughly chip and brush the slag off each
completed weld bead before making another pass.