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A portable spot welder. Spot welding (or resistance spot welding [1]) is a type of electric resistance welding used to weld various sheet metal products, through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric current.
Spot welding is a resistance welding method used to join two or more overlapping metal sheets, studs, projections, electrical wiring hangers, some heat exchanger fins, and some tubing. Usually power sources and welding equipment are sized to the specific thickness and material being welded together.
Spot welder.miller.triddle.jpg: Author: Triddle: Other versions: This file was derived from: Spot welder.miller.triddle.jpg (Changes: pale wall was extended behind the tongs to eliminate the difficult copper-coloured background in that area of the image; minor changes to brilliance etc. values.) Original photograph
Friction stir spot welds have a high strength, so they are even suitable for parts that are exposed to particularly high loads. In addition to automotive and rail vehicle construction, the aerospace industry is developing the process e.g. for welding cockpit doors for helicopters. [3]
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