How to weld a Butt Joint

Shielded Metal Arc Welding

Aim: To make butt joint by performing shielded metal arc welding (SMAW) using coated consumable stick electrodes.

Tools: 

1.Measurement Tools

Steel Rule

Inch Tape

2.Holding Device

Bench Vice

3.Cutting Tools:

Hand Hacksaw

 4.Welding Tools

 Tong

Tong

Chipping Hammer

Chipping Hammer

5.Furnishing Tools

Files

         

• Cut the required size mild steel piece with the help of hand hacksaw from the iron section.
• Prepare the edges of pieces to be welded.
• For more in detail please watch this Welding joint video
• Set the welding parameter like welding current, voltage, etc.
• Wear protective apron, goggles and hand glove.
• Keep the workpieces in butt joint position (1 mm away from each other), at the welding table. 
• Ensure that the circuit is properly completed and earthing is done.
• Insert a coated stick electrode in the electrode holder and produce arc by striking the electrode with metallic surface of the welding table.
• Perform the tacking operation on both ends.
• Perform the butt welding operation.
• 
  

Two major parameters during SMAW are the welding speed and feed of the electrode toward the weld pool. These parameters should be properly controlled to ensure a defect-free weld.

• After welding, hold the workpiece with a tong and keep it on floor.
• Remove the slag with the help of a chipping hammer.
• Clean the workpiece with the help of a wire brush.