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Tig welding uses a tungsten electrode, Tungsten has extremely high melting pointing. So when you TIG weld the electrode gets hot but it does not melt so we say its a non-consumable electrode and it does not mean it lasts for ever but it means it does not melt to to come part of the weld.

Tig welding training: WHAT IS TIG WELDING?

In a lot other welding process like mig, and stick electrode melt and becomes filler metal which we call consumable electrode process

The electrode slips into a collet the collet tightens up into a collet body. You can adjust the link the electrode sticks out of the holder by loosening up the end cap. When you tighten up the end cap. The collet clamps down on the on the electrode.

Tig works by melting the base metal (that is, the metal that makes up the two pieces that are to be joined. The heat is generated by an electric arc that forms between the base metal and the tungsten electrode. You can control the amount of heat with a foot pedal or with a thumbwheel on the torch.

Shielding gas is also fed through the welding lead and goes through a gas diffuse and flows out the nozzle. The shielding gas is often a mixture of 75% argon and 25% CO2 which stops the molten metal from reacting with oxygen, water vapour and other things in the atmosphere. The shielding gas is stored in high pressure cylinders. The pressure is reduced to a usable level by a device called a regulator.

For most metals, the current is Direct Current or DC. DC is like the current flowing from a car battery. One wire is always the negative and one is always the positive. In DC TIG welding, the electrode is usually negative, and the workpiece is positive. The term DCEN is used, indicating that the current is DC, and the electrode is negative. This is also called “straight polarity,” but DCEN is a more descriptive term. DCEN puts most of the heat on the workpiece, and it is the most common setup.

When welding aluminum, however, AC is used. In AC, the positive and negative voltages switch back and forth between the electrode and the workpiece. This puts more heat on the electrode, but it has a cleaning effect on the workpiece. You see aluminum forms oxides that float to the top of the weld and prevent a good weld. The backwards flow of electricity during half the cycle helps control these oxides.

In an electric circuit the current flows in a loop. In TIG welding, the current has to flow in a complete circle from the machine, to the torch, into the work, and back to the machine. A work lead is clamped to the work to complete the circuit from the workpiece back to the machine.

Now, you can TIG weld with or without filler metal. That’s not a choice in a lot of other processes. If you want to add filler metal to a TIG weld, you use filler rod, which is just a rod of metal with a specific alloy. You want to be sure the filler metal you are using is compatible with the base metal and has the strength required for the job.

The molten metal is protected by a shielding gas. This gas, usually argon and sometimes helium or other gases, keeps the molten metal from reacting with oxygen and water vapor in the atmosphere. The shielding gas is stored in high pressure cylinders like these. The pressure is reduced to a usable level by a device called a “regulator.”

So in summary, TIG Welding is an electric arc welding process. It uses a non consumable tungsten electrode. Filler metal is added separately, and the shielding gas comes from a high pressure cylinder.

SAFETY OF TIG WELDING OR ANY WELDING

Safety means keeping yourself and coworkers safe so always wear your personal protection equipment better known as PPE. Which include

1. Boots You need to have steel toe boots, leather boots coming up above your ankle, its a good safety boot to have
2. You need to have good jeans on without cuts, holes, loose threads which can be fire starters.
3. Mig welding puts off UV lights that are very bright that are harmful to the eyes and skin so you need to wear long sleeved(leather) or preferably a welding jacket to protect your skin from the sparks that come off when you weld.
4. The next thing to is that you need to protect your hands both from sparks, heat and the bright light that comes off from the weld using at least the medium thick gloves weather cuffs for protection of the upper arm. or the heavier duty welding gloves mainly used for stick or higher amperage welding.
5. You need a welding helmet with a minimum shade of 10, to protect your eyes and face from the bright light and the sparks to avoid a welders flash in your eyes or Z87 safety glasses
6. Grinding shield: Any time you going to to do your grinding, painting, wire willing, chipping you need a grinding to protect you from the flying metals

In conclusion be safe, watch out for your friends and surroundings

So in summary, TIG Welding classes involves an electric arc welding process. It uses a nonconsumable tungsten electrode. Filler metal is added separately, and the shielding gas comes from a high pressure cylinder.

TIG Welding classes Requirements