ARC Welding Processes:

The term arc welding applies to a big and diversified group of welding procedure that utilized an arc as the source of heat to melt and join metals. The formation of a joint among metals being arc welded may or may not require the utilization of pressure or filler metal. The arc is struck between an electrode and the workpiece that is mechanically or manually moved along the joint or that remains stationary while the workpiece is moved underneath it. The electrode shall be either a consumable wire or rod or a non-consumable carbon or tungsten rod that serves to carry the current and sustain the arc among its tip and the workpiece. While a non-consumable electrode is utilized, a separate rod or wire might supply filler metal if required. The consumable electrode, although, will be specially prepared so that it not just conducts the current and sustains the arc but also melts and supplies filler metal to the joint and might produce a slag covering as well.

Welding arc plays an significant role in the arc welding processes. Thus, first it is essential to understand the significance of welding arc.