Spot welding- The Form of resistance welding

Spot welding is a welding process in which the metals are joined due to the resistance of electric current flow. It is used to weld different types of sheet metal and used in making metal buckets, aluminum's and also used in making batteries. Resistance is a measure of how the object opposes an electric current. Tool holders and electrodes are the equipment used here. This welding usually occurs in three stages such as first the electrodes are brought into the contact and then current is applied and at last the current is removed. Automobile industries mostly use spot welding and it is an effective method for joining metal parts. Spot welding uses high electric current and heat, so it always better to use safety accessories for protection.