When machining materials through the welding process, the two types to consider are MIG / MAG welding and TIG. Each has its advantages over the other and in this article, we will be listing one by one and marking their differences.
The TIG system works with the heat generated by an electric arc that forms between the tungsten and the metal to be welded, where you can use or not supply metal. This system uses gaseous protection to remove the air and avoid possible contamination by oxygen.
This system is very useful when performing side pieces and then finishing a job. It is usually used in aluminium or magnesium parts, but it can be applied to all types of metals, being the favourite method for thinner metals due to its precise temperature control.
Advantages of using TIG welding:
- There are no emanations, splashes or sparks. This is because no input metal circulates through the arc.
- Provides high-quality welds in all positions, even in hard to reach places.
- It is welding more resistant to deterioration, stronger and more adaptable.
- Weld virtually all industrially used metals.
- Due to its gaseous protection, the welding area is very visible.
- No flux is required and there is no need for subsequent cleaning in welding.
- The system can be automated, mechanically controlling the gun and metal.
Welding with inert metal gas (MIG) or welding with active gas metal (MAG), is a process in which an electric arc is formed between an electrode and a metal workpiece that heats metals causing them to melt and They join.
The soldier zone is generally protected from air pollution by the use of an inert shield or cover gas (argon or helium).
On MIG welding we can also say that an electric arc is established between the workpiece and the electrode, which is shaped like a wire. When the inert gas is activated, it is known by the acronym MAG. With this type of welding, you can work in three different ways, manual, semi-automatic or automatic.
The most frequent use given to MIG welding is in small and medium thicknesses in steel structures, aluminium alloys, and also for non-ferrous materials.
MIG welding techniques:
- Short circuit transfer. When the short circuit is concrete, there is a change of metals. The tip of the wire thread joins the already molten weld.
- Spray transfer. It occurs when small metal droplets are removed from the tip of the wire and projected into the weld.
- Globular transfer It occurs when, said metal drops, are too large to sink.
Advantages of using MIG welding:
- Increased productivity by eliminating dead times by replacing electrodes that have already been consumed.
- It is possible to weld in any position.
- Cutting times are reduced.
- Reduction of the discontinuities of the cord, giving a good finish.