Page 57 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 8: Fillet lap joint on MS plate 10mm thick in
horizontal position (SMAW)

Objectives

At the end of this exercise you shall be able to
• select electrode, current, polarity and arc length
• use distortion control and arc blow control methods
• weld the lap joint with a short arc and uniform travel speed
• inspect the weldments for external defects.

Job Sequence

• Prepare and clean the plates as per given dimensions.
• Set the Lap joint as per drawing and tack weld.
• Fix the joint in horizontal position.

• If DC machine is used, connect the electrode to the negative and use short arc to control arc blow.
• To avoid distortion due to contraction preset the plates such a way that the angle of the tack welded joint is
decreased to 87° on the Back side.

• Deposit the root run without weaving.
• Hold the electrode at the centre of the joint and start
• From leftward and use proper technique to avoid

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