Core Welding Principles Of MIG (Metal Inert Gas) Welders & Its Application In Manufacturing Industry
Arc welding processes of the welders are as varied as the workpieces they create, and choosing the right one is important for the project’s success. The continuous evolution of the MIG or Metal Inert Gas welding technology assisting the MIG welders in improving their welding skills. The core principle of MIG welding is an arc that is maintained between the end of the bare wire electrode and the work piece where the source of heat is required to melt the parent metal is obtained.
Core Working Principles Of MIG Welders
In simple terms, MIG welders work on the basic principle of heat generation due to electric arc. This heat is further used to melt electrode and metal which solidify together and forms a durable joint. The shielded gas is also supplied through a welding nozzle which protects the weld zone from other reactive gases. This gives a good welding finish and a stronger joint.
Essential equipment required to perform MIG welding include:
Power source- In the MIG welding process, the welder required the DC power supply with reverse polarity- it means the electrode wire is connected positive terminal and the work piece to the negative terminal. It is due to the working principle of the electric circuit which states that 70% of heat is always on the positive side. The power source in MIG welding consists of the following:
- Power supply
- Rectifier which converts AC into DC
- Electronic controls which control the supply of power as per the MIG welder requirement
Welding torch- There is a thin line of difference between MIG welding torch and TIG welding torch. In the Mig welding torch, there is a mechanism that holds the wire firmly and supplies it constantly with the help of wire feed. The front end of the nozzle is equipped with a nozzle which is specifically used to supply inert gases. These gases then form a shielding area around the welding zone and further protect it from oxidation. The welding torch can however be, air-cooled or water cooled according to the requirement of current supplied, like for high current, the torch should be water cooled and for low supply, it is air cooled.
Shielding gases- The core function of shielding gases in the MIG welding process is to protect the weld portion from other reactive gases like oxygen, which has the chemical properties of affecting the strength of the welding joint. These shielding gases also form plasma, which helps in durable welding joints. However, the choice of gas completely depends on the welding material, but it is mostly argon, helium, and some of the other inert gases that are majorly used as shielding gases.
Regulators- As the name itself depicts, they are used to regulate the movement of inert gases from the cylinder. The inert gases are filed into the cylinder at high pressure. The inert gases cannot be used directly in this high-speed pressure so a regulator is required to place in between the gas supply which lowers down the pressure of gas according to the welder requirements.
Applications Of The Best MIG Welder Welding Output
- The automobile industry majorly demands MIG Welding and appreciate the skills of the best MIG welder
- Big construction projects like bridges and building materials are welded using the advanced technique of MIG welding
- Repairing of railway track heavily required MIG welding technique
- Pipe welding can be efficiently done with MIG
The technique of MIG welding is great for welding complex shapes and sizes of metals. It is a versatile form of welding technique. If you are looking for a welding process, then it’s time for you to get the skills and traits of the best MIG Welder at the construction site.