Page 212 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 52(C) : Construct corner joints on M.S. Sheet

(3 mm. thick plate) in horizontal position

Objectives

At the end of this exercise you shall be able to
• set the plate as a Lap joint in horizontal position.
• deposit the root run using 0.8 mm diameter filler wire to get a root penetration and fusion.
• avoid overlap on the bottom plate and undercut on the vertical plate.
• set and tack weld the plates in alignment as corner joint.

Job Sequence

- Cut the sheet by shearing machine as per drawing.
- Grind and file the edges of sheet to square.
- Deburr and clean the surface of the plates by carbon steel wire brush and filing.
- Set the plate in the form of Corner joint at 90 degrees with specified root gap in flat position as per drawing.
- Wear protective clothing.

- Connect the torch to positive terminal of the machine.
- Select dia 0.8 mm M.S. electrode
- Set 70 to 90 amps current
- Ensure proper root penetration and even fusion of plate A and B with suitable welding gun/torch angle and arc
travel speed.

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