Page 205 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 52(A) : Fillet weld - Lap joint on MS sheet 3mm

thick in flat position by dip transfer 1F

Objectives

At the end of this exercise you shall be able to
• prepare plate pieces to size as per drawing
• set and tack weld the plates in alignment as lap joint as per drawing
• set the lap joint in flat position for welding
• deposit the bead with appropriate amount of filler metal
• clean and inspect for surface deffects on the weld and bead appearance.

Job Sequence

1 Cut the sheet by shearing machine as per drawing.
2 Grind and file the edges of sheets to square.

3 Deburr and clean the surface of the plates by carbon steel wire brush and filling.
4 Set the plate A on the plate B in the form of lap as per drawing.
5 Wear protective clothing’s.
6 Connect the torch to the positive terminal of the machine.
7 Set 90-100A current/corresponding wire feed rate, 19 to 20 arc voltage and deposit the run using Dip transfer
mode.
8 Tack weld (min. 10mm length) on both ends of the lap joint as dhown in Fig 1.

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CITS : C G & M - Welder - Exercise 52(A)