Page 181 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

Fig 3

Move the electrode forward and backward along the line of the weld to
• Pre-heat the metal ahead of the weld
• Minimize the tendency to burn through

• Force the slag back over the top of the weld and control slag inclusion.
Inspection of the weld
Remove the slag from the weld and inspect for the following weld characteristics. (Fig 4)
• Width and height of bead should be uniform.

• Appearance should be smooth with close ripples.

Fig 4

• The face of the weld should be slightly convex.
• Edge of the welds should have good fusion, no overlap and undercut.
• The starting and stopping points should be free of depressions and high spots.
• The root of the weld and plate surface should have good fusion and penetration.

• The surface of the plate should be free of spatters.

‘T’ fillet joint by arc in flat position (TASK 2)

Objectives: At the end of this exercise you shall be able to:
• weld ‘T’ fillet joint by arc in flat position free of distortion and weld defects
• inspect the fillet for weld characteristics.

The weld deposited on a ‘T’ or lap joint is called a fillet weld. Often the ‘T’joint is called a fillet joint. (Fig 1) This
joint is mostly used in industrial fabrication work.
Setting and tacking (Fig 2)
Set the pieces in alignment, forming a 90° ‘T’.
Tack the pieces at both ends.

Use Ø 3.15mm M.S. electrodes.
Set current at 150-160 amps.

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CITS : C G & M - Fitter - Exercise 51