Page 292 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 74: Monitor the formation of Single V butt joint
on Aluminum sheet 6 mm thick by GTAW

in down hand
Objectives

At the end of this exercise you shall be able to
• mark and set the plate as per drawing
• select filler wire and set the gas flow and current
• deposite the bead with or without weaving
• clean and inspect the weld.

Job Sequence

- Prepare aluminium sheets as per dimensions.
- Use Tungsten (zirconium) 2.4mm dia electrode.

- Clean the edges of the sheets.
- Use the stainless-steel wire brush for surface cleaning.
- Set the square butt joint
- Select the various parameters as given in the Table 1 and set them accordingly.

- Weld the joint in flat position using leftward technique.
- Fill the crater.
- Clean the weld area thoroughly.

275

CITS : C G & M - Welder - Exercise 73