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Wednesday, 31 March 2010

The Spot Welding Overview


Spot welding is used to when full joins are not necessary, and particularly on plate and sheet metal, where the warping caused by other welding methods would be undesirable. Most metal framework are spot welded. Two electrodes, normally copper, are placed outside two directly abutted pieces of sheet. Electricity passes through the electrodes to the sheet, where the resistance of the metal guides to heat, causing melting and joining. Spot welding process is also the type resistance welding.

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