Metal Man FC130i, Руководство пользователя

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OVERHEAD POSITION is the most difficult welding position. Angle A (see HOLDING THE TORCH)
should be maintained at 60 degrees. Maintaining this angle will reduce the chances of molten metal
falling into the nozzle. Angle B should be held at zero degrees so that the wire is aiming directly into
the weld joint. If you experience excessive dripping of the weld puddle, select a lower heat setting.
Also, the weave bead tends to work better than the stringer.
8.4 Multiple pass welding
Butt Weld Joints: When butt welding thicker materials, you will need to prepare the edges of the
material to be joined by grinding a bevel on the edge of one or both pieces of the metal being joined.
When this is done, a “
V”
is created between the two pieces of metal, that will have to be welded
closed. In most cases, more than one pass or bead will need to be laid into the joint to close
the “
V .
”
Laying more than one bead into the same weld joint is known as a multiple-pass weld.
The illustrations in following figure show the sequence for laying multiple pass beads into a single
“V” butt joint.
NOTE:
WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to thoroughly chip and
brush the slag off each completed weld bead before making another pass or the next pass will be of
poor quality.
Fillet Weld Joints. Most fillet weld joints, on metals of moderate to heavy thickness, will require
multiple pass welds to produce a strong joint. The following figure will show the sequence of laying
multiple pass beads into a T fillet joint and a lap fillet joint.