TIG Welding
Like MIG welding, TIG (Tungsten Inert Gas) welding is a form of arc welding in which the molten weld pool is protected from oxidisation by a shield of inert gas, such as argon. Unlike MIG, the electrode is made from tungsten and is not consumed during welding.
If additional material is needed in the weld, a separate filler rod or wire is required, as in gas welding.
To avoid tungsten inclusion in the weld, it is common to avoid touching the workpiece with the tungsten tip and to instead start the arc with high frequency (HF), high voltage sparks. These sparks ionise the air between the tip and the workpiece, allowing current to flow.
TIG Advantages
- The sharp and rigid tungsten tip allows for high precision welding.
- The small arc produced by TIG welding is ideal for welding thin materials.
- No material is added to the weld unless it is required.
TIG Disadvantages
- A separate filler material must be used if additional material is required.
- The HF may cause electromagnetic interference to other nearby electrical equipment.
Olympus can supply TIG welding machines, torches and accessories and robot welding systems.