Page 175 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

Depositing straight beads (Fig 4)

Fig 4

Deposit straight beads by following the punched line and maintaining arc
• Correct arc length
• Correct travel speed

• Correct angle of electrode.
Ensure that the welding screen lens is clean so that you can see the arc and the weld line.
Replace the plain glass, if spattered.
LISTEN to the arc. It produces a steady sharp crackling SOUND.
Adjust the travel speed by watching the electrode melting and flowing through the molten pool to form a deposited
metal. (Fig.5a & b)

Fig 5

Weldment Inspection (Fig 6)
Remove the slag from the weldment using a chipping hammer and a wire brush.

Use goggles during slag removal.
Inspect the deposited beads and note any variations in the:

• Width and height
• Depth of fusion
• Length of run. (Straightness)

160

CITS : C G & M - Fitter - Exercise 51