Page 81 - CITS - Welder - Trade Practical

WELDER - CITS

Job setting
Set the job in overhead position on the positioner. (Fig 1)

Fix the electrode as shown in Fig 2.

Fig 1 Fig 2

Start the bead at the left side. (Fig 1)
Use a 30° work angle off the vertical plate as shown in Fig 3.
Work angle is the angle between the electrode and the job surface.

Drag angle is the angle between the electrode and the line of weld.
Maintain a short arc all the time.
When multi-passes are used the second pass should be placed between the first pass and the vertical plate so
that the second bead overlaps the first pass, (Fig 4) by about 2/3rd of its width.
The third bead should cover the top horizontal plate and about two-third of bead two. The leg lengths “L” of the
weld should be equal. (Fig 4)

Fig 2 Fig 3

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CITS : C G & M - Welder - Exercise 12