What is Constricted Arc in Welding?

The constricted arc is the plasma arc column that is shaped by the constricting orifice in the nozzle of the plasma arc torch or plasma spraying gun. This constricting orifice can be either a physical or an electrical one. The former is usually a hole with a small diameter, while the latter uses an electrode to create a smaller opening. When using constricted arc welding, the welders need to be careful not to overheat the metal as this can cause problems.

Why Use Constricted Arc Welding? What are the advantages of constricting plasma in the paw?

There are several advantages to using constricted arc welding:

  1. First, it allows for more precise welding as the arc is better focused. This means that there is less chance of making mistakes and ruining the workpiece.
  2. Second, constricted arc welding is generally faster than other types of welding, which can save time and money.
  3. Finally, it can be used in a variety of different settings, including in difficult-to-reach places.

What is keyhole plasma arc welding?

Keyhole plasma arc welding (KPAW) is a type of constricted arc welding that uses a small, focused arc to create a keyhole in the workpiece. The keyhole allows the plasma to penetrate deeply into the metal, making it ideal for welding thick materials.

Related Links

Plasma arc welding
constricted arc – definition – English
Plasma Arc Welding – TWI
Plasma Arc Welding (PAW)
Arc Plasma – an overview | ScienceDirect Topics

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