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A welding power supply is a device that provides or modulates an electric current to perform arc welding. [1] There are multiple arc welding processes ranging from Shielded Metal Arc Welding (SMAW) to inert shielding gas like Gas metal arc welding (GMAW) or Gas tungsten arc welding (GTAW).
This type is typically found in cutting and welding applications all over the world. They work equally effectively in all orientations, and need very little maintenance. The simplest flashback arrestor consists of a metallic tube filled with iron wool, which cools the flame below the ignition temperature.
Arc welding power supplies can deliver either direct (DC) or alternating (AC) current to the work, while consumable or non-consumable electrodes are used. The welding area is usually protected by some type of shielding gas (e.g. an inert gas), vapor, or slag. Arc welding processes may be manual, semi-automatic, or fully automated.
Diver-welders and welding operators for hyperbaric dry welding ISO 17635: Non-destructive testing of welds. General rules for metallic materials ISO 17660-1: Welding - Welding of reinforcing steel - Part 1: Load-bearing welded joints ISO 17660-2: Welding - Welding of reinforcing steel - Part 1: Non-load bearing welded joints ISO/TR 20172
Welders at work, c. 1939. A welder is a person or equipment that fuses materials together. The term welder refers to the operator, the machine is referred to as the welding power supply. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer.
The oldest welding process in the world. Oxides must be removed by flux or flames. Damascus steel: Friction welding: 42: FRW Thin heat affected zone, oxides disrupted by friction, needs sufficient pressure Aerospace industry, railway, land transport Friction stir welding: 43: FSW A rotating non-consumable tool is traversed along the joint line