Page 271 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 68: Construct Square butt joint on Aluminum
sheet 2 mm thick in Horizontal positions

by GTAW

Objectives

At the end of this exercise you shall be able to
• weld square butt joint in Aluminum sheet 3mm thick using TIG welding process.
• add filler metal at the required rate and place by manipulation the filler rod
• deposit fusion run with filler rod in flat position and maintain uniform arc travel speed
• clean and inspect the deposited beads for surface defects.

Job Sequence
• Prepare aluminium sheets as per dimensions.

• Use Tungsten (zirconium) 2.4 mm dia electrode.
• Clean the edges of the sheets.
• Use the stainless steel wire brush for surface cleaning.
• Set the square butt joint.

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