Page 76 - CITS - Welder - Trade Practical

WELDER - CITS

Fig 1 Fig 2

The arc length should be short.
Note: The root penetration depth should not exceed 1.6 mm.
Remove the slag and clean the root run by using a chipping hammer and wire brush.
Deposit the second run using a 4 mm dia. M.S. electrode over the root layer with 160 amps current and an
electrode movement slightly sideways. (Fig 3)
Remove the slag and clean the weld bead thoroughly.
Deposit the third layer using a 4 mm dia. M.S. electrode and 160 amps current (Fig 4) pausing regularly at the
toes of the weld.
The weaving motion of electrodes can be anyone of the three patterns shown in Fig 3 and Fig 4.
The arc length should be short which helps to control sagging of weld metal.
Avoid undercut and excessive convexity, concavity.

Remove slags with a chipping hammer and clean the weld bead thoroughly with a wire brush.
Inspect for root penetration, undercut, blow holes and excess reinforcement.

Fig 3 Fig 4

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CITS : C G & M - Welder - Exercise 11 CITS : C G & M - Welder - Exercise 11