Page 239 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 58(B) : Lap joint on S.S. sheet 2mm thick by

GMAW

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.
• set up the GMAW machine and set welding parameters.

Job Sequence

- Cut the plate by using hacksaw cutting as per drawing
- Clean the joining edges and surface of the plates
- Set the plate A on the plate B in the form of tee as per drawing
- Tack weld on both ends of the Lap joint
- Set 90-100A current/corresponding wire feed rate, 19 to 20 arc voltage and deposit the run using Dip transfer
mode
- Weld the lap joint by using 0.5 mm dia. Mild steel filler wire and using stringer bead welding technique.
- Ensure good leg length and even fusion of plates.

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