Mechanical Engineering - Workshop Technology - Discussion

The correct answer is: 60°-70°.

In back-hand welding, also known as "backhand" or "trail" welding, the welding torch is held at an angle of approximately 60°-70° relative to the workpiece. This technique is used for welding in tight spaces or for producing a specific type of weld bead.

Here's why the other options are incorrect:

- 30°-40°: This angle is too shallow for back-hand welding.
- 40°-50°: This angle is also too shallow and is more suitable for flat-position welding.
- 50°-60°: This angle is getting closer, but still not ideal for back-hand welding.

Backhand welding is commonly used for:

- Welding in tight spaces or corners
- Producing a flat, wide weld bead
- Welding thin materials
- Creating a specific weld profile

So, the exact angle may vary depending on the specific application, material, and welder's preference. However, 60°-70° is the typical range for back-hand welding.

Leftward or forward welding:

The angle of a rod with workpiece - 30-40°.
Angel of the torch with workpiece- 60-70°.

Rightward or backhand or backward welding:

The angle of the rod with workpiece- 30-40°.
The angle of the torch with workpiece- 40-50°.

Filler rod held in the left hand at an angle 30-40.

Torch is held in the right hand at an angle of 40-50 and welding action starts from left hand side and proceeds to the right hand side.

The flame is focus towards to the non welded portion is called For Hand (Left Hand) and Focus towards to the welded portion is called Back hand (Right hand) welding Technic.

It is also known as RIGHTWARD WELDING. In this welding the weld is made from LEFT to RIGHT. Welding rod makes an angle of 30-40.

RIGHTWARD WELDING - LEFT TO RIGHT.
ANGLE ROD WITH WORK - 30-40.
ANGLE TORCH WITH WORK - 40-50.

Leftward or fore hand welding: RIGHT TO LEFT.
ANGLE ROD WITH WORK: 30-40.
ANGLE TORCH WITH WORK: 60-70.

What is the direction of forehand welding?

Fore-hand 30 - 40.

Back-hand 40 - 50.

Fore-hand 30 - 40.

Back-hand 40 - 50.