Tweco 130i Transarc Operating Manual - Manual (Page 42)

TRANSARC 130i
BASIC WELDING GUIDE 4-6 Manual 0-5283
to prevent slag from running ahead of the weld. Refer to Figure 4-13. Do not attempt to build up much
larger than 6.4mm width with a 3.2mm electrode, otherwise the weld metal tends to sag towards the base,
and undercut forms on the vertical leg. Multi-runs can be made as shown in Figure 4-14. Weaving in HV
fillet welds is undesirable.
Art # A-07699_AB
45° from
vertical
60° - 70° from line
of weld
Figure 4-13: Electrode Position for HV Fillet Weld
Art # A-07700_AB
1 2
3
4
5
6
Figure 4-14: Multi-runs in HV Fillet Weld
C. Vertical Welds
1. Vertical Up
Tack weld a three feet length of angle iron to your work bench in an upright position. Use a 3.2mm
Ferrocraft 21 electrode and set the current at 100 amps. Make yourself comfortable on a seat in front
of the job and strike the arc in the corner of the fillet. The electrode needs to be about 10º from the
horizontal to enable a good bead to be deposited. Refer Figure 4-15. Use a short arc, and do not attempt
to weave on the first run. When the first run has been completed de-slag the weld deposit and begin
the second run at the bottom. This time a slight weaving motion is necessary to cover the first run and
obtain good fusion at the edges. At the completion of each side motion, pause for a moment to allow
weld metal to build up at the edges, otherwise undercut will form and too much metal will accumulate
in the centre of the weld. Figure 4-16 illustrates multi-run technique and Figure 4-17 shows the effects
of pausing at the edge of weave and of weaving too rapidly.
Art # A-07701
Figure 4-15: Single Run Vertical Fillet Weld