Page 270 - CITS - Welder - Trade Practical

WELDER - CITS

• Tack the set pieces at correct intervals and in correct alignment for an outside corner joint.
• Weld the joint in flat position.

• Make uniform size bead with correct penetration at the root in the outside corner joint.
• Clean the weld area thoroughly.
• Inspect the completed outside corner weld for weldment quality.

Skill Sequence

Assess Corner joint on Aluminum sheet 2 mm thick in

down hand position by GTAW

Objectives: At the end of this exercise you shall be able to
• assess Corner joint on Aluminum sheet 2 mm thick in down hand position by GTAW.

Ensure the setting of an outside corner joint as per drawing.

Adjust current 60- 90 Amp in AC.(Refer Table 1 of fabrication - welder Ex.No. 2.2.02)
Use a backing bar made from a piece of steel angle with its apex bevelled or radi used to accommodate the
penetration bead.

Hold the sheet on to the backing bar with steel strap.
- correct alignment and uniformity of bead with correct penetration after cleaning the welded joint thoroughly.
- uniform ripples with equal width and height of bead.

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CITS : C G & M - Welder - Exercise 67