spot welding
Noun 1. creating an overlapping joint by welding at small points (synonym) spot-welding (hypernym) welding (derivation) spotweld, spot-weld spot-weld Noun 1. each of the welds made by welding at a separate point (synonym) spot weld (hypernym) weld (derivation) spotweld Verb 1. make circular welds; "These pipes are only spotwelded" (synonym) spotweld (hypernym) weld (derivation) spot welding, spot-welding spot-welding Noun 1. creating an overlapping joint by welding at small points (synonym) spot welding (hypernym) welding (derivation) spotweld, spot-weld | ||||
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Spot welding Definition from Encyclopedia Dictionaries & Glossaries
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Spot welding
Spot welding is a type of resistance welding used to weld various sheet metals. Typically the sheets are in the 0.5-3.0 mm thickness range. The process uses two shaped copper alloy electrodes to concentrate welding current and force between the materials to be welded. The result is a small "spot" that is quickly heated to the melting point, this forms a nugget of welded metal after the current is removed. The amount of heat released in the spot is determined by the amplitude and duration of the current. The current and duration are chosen to match the material, the sheet thickness and type of electrodes. Applying the current for too long can result in molten metal being expelled as weld splash, or can even burn a hole right through the materials being welded.
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