Welding Procedure steps - Welding Techniques: Forehand And Backhand, Left hand, Right hand Technique - Time Zero

Welding Procedure steps -

Welding Techniques: Forehand And Backhand, Left hand, Right hand Technique

Modern welding techniques

Basic welding techniques

Welding Techniques:

1] Forehand or Left-hand Welding Technique:

If the flame is focused toward the non-welded portion is known as forehand welding technique.

  2] Backhand or Right-hand Welding Technique:

If the flame is focused toward the already welded portion is known as backward welding technique.

 Most of the welders feel forehand welding technique is more effective and efficient if it is done from left hand to right-hand direction. Where backhand welding technique is more effective and efficient if it is done from the right hand to left-hand direction.

In forehand welding technique because the flame is focused toward the non-welded portion preheating of the joint will be taking place. Where with backhand welding technique because the flame is focused toward the already welded portion, the post-heating of weld ability will be taking place.

In forehand welding technique the force of flame is pushing molten slag particle back into the weld pull so that some amount of slag particles are retained inside the weld bead and non-uniform slag layer is forming over the weld bead. Due to the presence of slag inclusion, it is reducing the strength of the joint, whereas the non-uniform slag layer will promote atmospheric contamination.

In case of backhand welding technique the force of flame is pushing out the molten slag particle from the weld pull, therefore, no slag inclusion present in the weld bead and uniform slag layer is forming over the weld bead. This gives higher strength of the joint without any atmospheric contamination.

With forehand welding technique up to 4 mm thickness plate can be joined into single pause straight movement of the torch, and up to 6 mm thickness plate can be joint in single pause modified movement of the torch.

With backward welding technique, up to 6 mm thickness plate can be joined in single pause straight moment of the torch, and up to 15 mm thickness plate can be joint into a single pause in a modified moment of the torch.

Welding Position

Will discuss in our next article.

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