WELDTECH WT200MP - Fillet Welds and Vertical Welding; Fillet Weld Techniques; Vertical Up Welding Procedure

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Heavyplatewillrequireseveralrunstocompletethe
joint. After completing the rst run, chip the slag out
and clean the weld with a wire brush. It is important
to do this to prevent slag being trapped by the sec-
ondrun.Subsequentrunsarethendepositedusing
either a weave technique or single beads laid down
inthesequenceshowninFigure1-22.Thewidthof
weave should not be more than three times the core
wire diameter of the electrode.
When the joint is completely lled, the back is either
machined, ground or gouged out to remove slag
which may be trapped in the root, and to prepare
a suitable joint for depositing the backing run. If a
backing bar is used, it is not usually necessary to
remove this, since it serves a similar purpose to the
backing run in securing proper fusion at the root of
the weld.
B. Fillet Welds
These are welds of approximately triangular cross-
section made by depositing metal in the corner of
two faces meeting at right angles. Refer to Figure
1-14,1-23and1-24.
A piece of angle iron is a suitable specimen with
which to begin, or two lengths of strip steel may
be tacked together at right angles. Using a 3.2mm
E7014 Stick electrode at 100 amps, position angle
iron with one leg horizontal and the other vertical.
Thisisknownasahorizontal-vertical(HV)llet.
Strikethearcandimmediatelybringtheelectrodeto
a position perpendicular to the line of the llet and
about45ºfromthevertical.Someelectrodesrequire
being sloped about 20º away from the perpendicular
position to prevent slag from running ahead of the
weld.RefertoFigure1-23.
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 1-24.Weaving in HV lletwelds is
undesirable.
Electrode Position
for HV Fillet Weld
(Fig 1-23)
45
o
from
vertical
60
o
-70
o
from
line of 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
E7014 Stick 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 llet. The
electrode needs to be about 10º from the horizontal to
enableagoodbeadtobedeposited.ReferFig.1-25.
Multi-Runs in HV Fillet Weld
(Fig 1-24)
Single Run Vertical Fillet Weld
(Fig 1-25)
Weaving motion for
second and subsequent
runs
Pause at edge
of weave
Multi Run Vertical Fillet Weld
(Fig 1-26)
Useashortarc,anddonotattempttoweaveonthe
rst run. When the rst run has been completed de-
slag the weld deposit and begin the second run at
the bottom. This time a slight weaving motion is nec-
essary to cover the rst 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 edg-
es, otherwise undercut will form and too much metal
will accumulate in the centre of the weld. Figure
1-26illustratesmulti-runtechniqueandFigure1-27
shows the eects of pausing at the edge of weave
and of weaving too rapidly.