Resistance spot welding is accomplished through the resistance of the base metal to cause localized heat and form a weld. With spot welding, like any other welding, there are potential hazards involved with the process.
- The weld is made by a combination of heat, pressure, and time.
- It is the resistance of the material to be welded to current flow that causes a localized heating in the part.
- Resistance Spot Welding, unlike many other welding or cutting processes, produces little fumes and only negligible arc rays.
- There is higher risk of mechanical hazards, such as pinching and crushing the fingers and hands, than other processes.
- The MIG or TIG weld is made from one side only, while the resistance spot weld is normally made with electrodes on both sides of the workpieces.
- Fumes from spot welding on parts coated with cleaners, paints, and platings can be hazardous.
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