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Machining Video: Robotic Pulsed Gas Metal Arc Welding (GMAW-P) of Complex Component Hold on Rotary, Prepared by Spot Weld on Jig
DEFINING GMAW-P
Gas metal arc welding (GMAW) is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join.
Along with the wire electrode, a shielding gas feeds through the welding gun, which shields the process from contaminants in the air. The process can be semi-automatic or automatic. A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used. There are four primary methods of metal transfer in GMAW, called globular, short-circuiting, spray, and pulsed-spray, each of which has distinct properties and corresponding advantages and limitations.
In short, GMAW is for welding steel and the non-ferrous alloys that have been developed to give maximum strength, ductility, and toughness.
Let's then talk about Spot Welding. It's often selected for joining sheet metal fabrications, stampings and assemblies because it is fast, reliable and economical. However, numerous design considerations can affect the quality and cost of the weld, among them: size of the spot weld, accessibility, positioning, materials and thicknesses being joined, and the number of spots needed to attain the desired strength.
Although this video is more about CO2 Arc Welding, Arc Pulsation Welding and TIG Welding, it is related to Robotic Pulsed Gas Metal Arc Welding: machining.co.za/video/195163502
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