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Spot welding is a welding method used extensively in e.g. car production, and the elements of the method are current and pressure. The two workpieces to be spot welded are placed on top of each other, and the spots to be welded are subjected to pressure between the electrodes. When subsequently a current is sent through the workpieces, the metal is heated to the melting point where the greatest pressure is applied.
Spot welding is applied for welding of both steel, stainless steel and aluminium, and although the method is best suited for welding of thin sheets, it is also possible to weld steel workpieces with a thickness of up to 5 mm. Spot welding can also be used for welding nuts onto sheet parts.
GBI (Gl. Bedsted industri A/S) offers spot welding in sheet workpieces of a thickness of up to 3 mm.
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