In the world of welding, there are many different kinds of welds and welding procedures that hold different purposes and significance. Welding is more than just melting two pieces of metal together using heat and electricity; instead, it is an art form that requires a skilled eye, patience, and an appreciation for beauty. It’s a serious job that requires some serious training, practice, and an understanding of the different methods used in the industry.
Plasma Arc Welding
This type of welding uses a smaller arc that is formed between a non-consumable tungsten electrode and the work, requiring a lot of precision. It is most commonly used in aircraft manufacturing, medical equipment, and automotive manufacturing. This process is similar to gas tungsten-arc welding because they both work in a similar fashion, but use a different type of torch. In this process of welding, an electrical current passes through an extremely small spout before continuing through shielding gases that protect the weld, allowing for incredible precision. Because of the concentration of energy, plasma arc welding heats metals to extreme temperatures, producing deep welds. This form is optimal for welding small areas.
Flux Cored Arc Welding
Also known as FCAW, this process was developed to replace stick welding. It is a semi-automatic process that requires a consumable tubular electrode to be constantly fed into it. This electrode contains a flux and a constant voltage that makes this welding process ideal for projects that require speed. This form is commonly used in construction because of its ability to weld in multiple situations and on various materials. Its general uses can include pipeline welding, underwater welding, shipbuilding, and manufacturing.
TIG welding, or tungsten inert gas welding, a.k.a, gas tungsten arc welding (GTAW) uses inert gases to shield the weld and a foot pedal to control the heat. TIG is tungsten, which means that it requires a filler to be placed inside the welding device to ensure that tungsten does not melt in the process of welding. This welding process is unique because it is extremely versatile, but also one of the most difficult to master. It does, however, produce a clean and precise weld without sparks and fumes. The torch heats and welds many common metals like aluminum, steel, brass, nickel, and copper. One good thing about tungsten is its capability to reach a high temperature, higher than most metals, before it melts.
Shielded Metal Arc Welding
This form of welding requires the welder to follow a manual process of stick welding. The electric current produced by the stick forms an electric arc between the stick and the metals, joining the metals that are being welded. Shielded metal arc welding, or SMAW, is most commonly used in welding steel structures. Because this is a manual process, it yields somewhat messy results and produces molten splatter. It is, however, simple and inexpensive to operate. This method is used in construction involving steel structures.
Gas Metal Arc Welding
MIG is considered a semi-automatic welding process that consists of a constant voltage, direct-current power source, and the production of a protective gas that shields the weld from the natural elements. The process of gas metal arc welding, or GMAW, is great for manufacturing industries and automobile repair because it saves time and money. Gas welding kits are portable but require acetylene and oxygen. It has four metal transfer methods, including globular, spray, pulsed-spray, and short-circuiting.
At Missouri Welding Institute, we place pride and integrity into our welding work and education. We are dedicated to providing our students with the knowledge and skills necessary to enter society. Enroll with us today!