This helps prevent buckling and also ensures an uninterrupted wire feed. The electrode wire is guided and protected by the electrode conduit and liner. The contact tip should be of the right size as it will determine the area of contact between the electrode and the base metal. The contact tip is connected to a power source via a power cable that is responsible for transmitting the electrical energy to the electrode. This reduces the spatter produced during the welding process. The contact tip is usually made of copper and is chemically treated at times.
To be able to understand how Gas Metal Arc welding or MIG welding works, you need to understand what a MIG welding gun is.Ī MIG welding gun has numerous components, including a control switch, a power cable, contact tip, gas nozzle, gas hose, electrode conduit and power, and a shielding gas flow. The weld zone comprises of the HAZ and the weld metal. This is basically a non-standard term that is used for the weld junction. The fusion line is the boundary between the HAZ and the weld metal. The Heat Affected Zone (HAZ) is that part of the parent metal that gets affected metallurgically but doesn’t melt as a result of the heat of the welding process. The weld metal includes all the metal that is melted and retained during the formation of the weld. This is the metal that is added during the process to join the metals together. The parent metal is the metal that is to be joined by welding. Your first step of the road to MIG welding is understanding the basics. How Does MIG Welding Work?īefore we can move onto the actual welding process, you first need to familiarize yourself with some important terminologies that will help you better understand the process of MIG welding. MIG welding requires a DCEP (Direct Current Positive Electrode), also known as Reverse Polarity. This type of welding uses a shielding gas to protect the molten pool of weld metal from reacting with elements present in the atmosphere. This arc is formed between the surface to be welled and a continuously fed filler electrode. This is done by heating the metals with the help of an arc.
This type of welding is basically an arc welding process that joins two metals. Metal Inert Gas (MIG) is also known as gas metal arc welding (GMAW). 12.3) What is the advantage of MIG welding? What Is MIG Welding?
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