Page 85 - CITS - Welder - Trade Practical

WELDER - CITS

Adjust it to a suitable height.
Use a light welding cable to reduce the load on your arms.
Weld root run

The electrode should be kept as near as possible and square to the surface of the plate and at a small angle to
the direction of the weld. (Fig 3) Keep the electrode well up in the gap and control the ‘keyhole’ to get a small
reinforcement on the weld on the root side. (Figs 3 and 4)

Fig 3 Fig 4

Keep a short arc length. (Fig 4)
Note: Control the slag. The slag must not drop into or flood the weld pool.

Weld up to the end of the work piece, chip off the slag after cooling and inspect the weld.
Weld second and third passes
Select a 3.15 electrode and set 100 amps current.
Use weaved beading technique.

The electrode should be moved across the face of the weld. (Fig 5)
Do not deposit too much metal in the centre of the bead causing it to sag in the centre.
The side-to-side movement should be kept within the required weld size. (Fig 6)
Stop a while at the sides of the weld to prevent undercut. (Fig 7)

Chip off the slag and inspect the weld.

Fig 5 Fig 6 Fig 7

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CITS : C G & M - Welder - Exercise 13