Arc welding power source
Arc welding is a metal joining process by which two pieces of metal are fused together by the application of a high current electricity. Arc welding is one of the most popular and efficient methods of joining metal together and can be used for a variety of processes. To perform arc welding, a welding machine is needed to provide the necessary power and current. In this article, we will examine the different types of arc welding power source, their characteristics and applications.
Arc welding power source can be classified into two main categories: AC or DC. AC arc welding power sources are powered by alternating current, while DC arc welding power sources are powered by direct current.
AC arc welding is the most commonly used power source in arc welding and is the most economical option. It is the preferred arc welding power source for outdoor welding because of its capability to create smooth and uniform beads with minimal spatter and good penetration. AC arc welding is also used for short circuit transfer welding, spray transfer welding, and GTAW (tungsten inert gas (TIG) welding).
DC arc welding is slightly more expensive than AC arc welding and is used for thicker metals and deeper penetration welding. This power source is beneficial for welding in tight spaces, such as corners and vertical joints. DC arc welding is used for spray transfer welding and metal inert gas (MIG) welding, as well as some types of TIG welding.
Both AC and DC arc welding power sources are available in a variety of power ratings to meet the needs of different welding applications. The power rating of the machine is determined by the current and voltage capabilities of the power source. Power ratings range from 80A to 500A, with higher power ratings providing more power and current for thicker metals and deeper penetration welding.
In addition to power source types, arc welding can be divided into conventional welding processes and advanced welding processes. Conventional welding processes include shielded metal arc welding (SMAW), gas metal arc welding (GMAW), and flux-cored arc welding (FCAW). These processes use conventional arcs and have been in use for many decades. Advanced welding processes use new arc technologies including pulsed arc welding, high frequency welding, and laser welding. These processes use the same equipment and techniques as conventional welding, but the power sources and arc characteristics give the weld a different appearance and characteristics.
Regardless of whether the arc welding process is conventional or advanced, all arc welding power sources must be properly grounded for safe operation and to avoid electric shock. Grounding provides a path for the current generated by the welding power source to flow away from the welding site and be discharged safely.
To sum up, arc welding is a widely used and efficient method of joining metal together. There are two main types of arc welding power source, AC and DC. AC arc welding is the most economical option and is best for outdoor welding, while DC arc welding is more expensive and is better suited for thicker metals and deeper penetration welding. In addition, arc welding processes can be divided into conventional and advanced welding processes, which will require different power sources and arc characteristics. Lastly, all arc welding power sources should be properly grounded in order to ensure safe operation.
