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Instructions for TIG Welding

Medha Godbole Jan 28, 2019
The full form of TIG welding is Tungsten Inert Gas welding. It is also known as Gas Tungsten Arc Welding (GTAW). Here, we will provide information regarding this type of welding.
Arc Welding is not a very unfamiliar term for mechanical engineers and architects. It is basically the process of creating an electric arc between the base material and an electrode. This contact melts the metals at the welding point.
TIG is one such form of arc welding. In this process, non consumable tungsten electrodes are employed for the weld generation. The uniqueness in its form lies in the usage of a shielding gas, which is mostly an inert gas such as argon, and a filler metal for protection of the weld area from contamination.

TIG Welding Instructions

Basics

The basics and workings are a bit complicated, especially when it is manual gas tungsten arc welding. For striking the welding arc, a path for the welding current through the shielding gas is generated by a high frequency provider. This allows the arc to get struck, when the electrode and the work piece are around 3 mm. away.

Choose the Electrode

For aluminum welding, tungsten rods are supposed to be the best ones. Likewise, you can choose from a number of tungsten alloys, which are particularly suited to welding the alloys of a specific metal.

Electrode Grinding

Grind the selected electrode to a point; in this case, a tungsten rod. Due to the heat generated because of the weld, the tip will become rounded.

Insertion of Electrode into its Collet

Opening the back of the electrode holder, insert the rod, and place it back. After this, set the electricity option for aluminum, from the 3 main electricity options in a TIG rig. Then, adjust the cleaning or penetrating settings on the penetrating side. On a scale of 10, this will be 7.
Similarly, there is an air setting. Set it for about 5 seconds. This air refers to the time for which the gas is retained, after stoppage of the arc, which will prevent the oxidization or rusting of your weld. If there is an option, set the max amperes on high around 250.

Turn the Gas On

Use argon as a shielding gas for aluminum. If it's steel, then use a mixture of argon or carbon dioxide. The gas works as a shield against corrosion or rusting of the weld.

Proper Area and Set Up

A large metallic area is imperative for the electricity flow through metal. A welding table or a large flat piece of sheet metal is perfect. Check out if you need to clamp down your metals for keep them fixed while welding. Spray the surface with anti-spatter, if you have one so that the metal doesn't stick when it separates out during welding.

Final Checking

Last but not the least, check the electrode thoroughly. In your dominant hand, hold it and confirm whether it can be moved uninhabited, as an unhampered cord.
Any normal dress would be advisable while you are indulging in such occupations. Ensure that you are wearing closed toe shoes, leather welding gloves, and a welding helmet. Use a welding coat to avoid burns. Also, it is always a good option to consult a professional when in doubt.
Disclaimer: This is only for reference purposes. Always consult an expert before undertaking any of these steps.