EXPERIMENT NO 6

SINGLE V BUTT JOINT

Aim: To make a single V‐butt joint, using the given mild steel pieces by arc welding.

Work Material: Two mild steel pieces of 75X50X6 mm.

Consumable item: Welding rod (3.15mm)

Tools and equipment’s used: Arc welding machine, Mild steel electrodes, Electrode holder, Ground

clamp, flat nose Tong, Face shield, Apron, Hand gloves, Metallic work Table, Bench vice, Rough flat

file, Try square, Steel rule, Wire brush, Ball peen hammer, Chipping hammer, Chisel and Grinding

machine.

List of operations: Marking, Cutting. Filing, Tack welding, Full welding, Chipping

Procedure

1. Collect the tools and equipment’s.

2. Study the given drawing before welding.

3. Prepare the two work piece by power hacksaw cutting into required dimensions.

4. File the two pieces by using rough file and make it V shape

5. Select the size of the electrode suitable to the thickness and type of welding.

6. Wear safety equipment’s for welding.

7. Assemble the pieces to be welded on the welding table.

8. Fix the earth clamp to the base metal

9. Select the required voltage and current in the welding machine.

10. Switch on the welding machine.

11. Grip the electrode on the electrode holder and check the welding arc by welding on a

waste piece.

12. Make the tack welds at interval on the joints.

13. Check the alignment of the pieces after the tack weld.

14. Make the complete welding from one end to another.

15. Remove the slag using the chipping hammer

16. Inspect the weld for finding the defects.

17. Switch off the machine.

Result The welded single V‐butt joint is obtained.