How to use a MIG welding machine: 19 steps


Part 1 Getting to Know the MIG Welding Process 1 Learn the basics of the “MIG” welding process. This method (gas shielded arc welding) is more commonly known as “MIG” welding (Metal inert gas). It was developed during the Second World War to quickly weld resistant and durable assemblies. Nowadays he is employed in several workshops and factories and also by welding enthusiasts in their domestic work. 2 Familiarize yourself with how this process works. The welder uses a welding machine equipped with a welding wire feeding system. The unwinding is controlled by the trigger of a “MIG” welding torch. The closure of an electrical circuit allows the flow of current in the filler metal and the creation of an electric arc between the filler metal and the workpiece to be welded. Often, an inert protective gas is used which flows through a diffuser attached to the end of the welding torch. The transfer of the filler metal can be done by several methods. Short-circuit transfer, used for parts with small thickness. The globular transfer used for thicker parts. Spray transfer in which the voltage and amperage used are higher. 3 Familiarize yourself with the applications. When you master the use of a “MIG” welding machine, you can do repairs in your home. This type of post can be used to weld parts of all thicknesses, stainless steel, mild steel and aluminum. As for the shielding gases, they vary according to the nature of the parts to be welded and the metals of contribution. Part 2 Getting Ready to Solder 1 Prepare your safety equipment. You will need a complete equipment in order to work in good conditions of safety. You must have a pair of gloves, a mask and a protective suit. Be sure to cover your entire body to avoid exposing it to ultraviolet light. Have a mask with a filter glass # 10 or higher. This glass will provide effective eye protection, especially against a possible arc. If you operate in a poorly ventilated room, you will need to wear a gas mask to avoid inhaling toxic fumes during welding. Wear gloves to protect your skin from molten metal splashes. Place a CO2 extinguisher and a sandbox nearby to quickly fight an accidental fire. 2 Choose an easy-to-use “MIG” welding torch. Some have the shape of a pistol, while others resemble an acetylene torch. The size of the post to be welded depends on the extent of the work to be done. A “MIG” torch can be cooled with air or water. Water-cooled torches are used for intensities of 200 amps or less and are easier to handle when the work area is reduced. Air-cooled torches are generally used by amateur welders. 3 Prepare the work area. Remove all flammable products and find a suitable place to do your welding work. You can connect the ground wire directly to the workpiece. However, most workshops have a metal workbench that is used to connect the ground wire. If other people are nearby, isolate the work area with welding curtains to protect them from ultraviolet rays. Part 3 Arrange the welding wire 1 Find the correct filler metal. Use a filler metal of the same kind as the material you are going to weld. For example, if you are welding stainless steel, take a stainless steel filler. To weld steel, there are two main types of filler metals. “AWS ER70S-3” solder wire is a general-purpose filler metal. It is usually the most economical choice. There is also the thread “AWS ER70S-6”. This filler metal is made of high quality steel and is designed for welding on rusty or dirty steel. The wire “E71TGX” can be used without shielding gas. It is suitable for welding painted or rusted parts or when the operation is conducted in strong winds. Choose the diameter of the …

Source

Leave a Reply

Your email address will not be published. Required fields are marked *