Spot welding is a resistance welding method in which welding parts are assembled into lap joints and pressed between two columnar electrodes, and the base metal is thermally melted by resistance to form a solder joint.Spot welding is mainly used for sheet welding.Spot welding process:
1. Prepress to ensure good contact of the workpiece.
2, electrification, so that the weld nugget and plastic ring.
3. Power failure forging makes the nugget cool and crystallize under the continuous action of pressure to form a welding spot with compact structure and no shrinkage hole or crack.
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