Page 234 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 57 : Review single V butt joint on M.S. plate

(10 mm. thick plate) in over head position
by GMAW

Objectives

At the end of this exercise you shall be able to
• prepare the plates with necessary bevelling and root face
• preset the plates in alignment in vertical plane with necessary root gap and tack weld
• deposit the root run with root penetration and uniform melting of both root faces of the joint
• 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
- Adjust the power source and wire feeder to obtain 18 to 19 volts and 90 and 100 amperes, gas flow 8-10 LPM.

217