Resistance Spot Welding Operation is used for joining the plates of railway tracks, fuel tanks, domestic radiators, etc.
In the last session, we had discussed gas welding process and arc welding process and whereas in today's session, we will discuss on Resistance Spot Welding along with its Definition, Construction, Working Principle, Applications, Defects, Advantages, and Disadvantages
The heat required for melting and joining of the plates obtained through the electrical resistance of the circuit, in the form of spots (nugget) is called Resistance Spot welding Operation.
Resistance Welding operation is classified as follows.
It is a simplest type of welding, where the two sheets are melted and joined by the application of force and electrical energy at the same timeleads to the generation of heat and formation of spot that joins two metal sheets.
It is also know as continuous spot welding in which a roller form an electrode.
It is similar to spot welding in which a dimple can be generated on the workpieces where there are welded.
In this article, we can discuss in detail on Resistance Spot Welding Operation.
The diagram of Resistance Spot Welding operation is shown below.
The Resistance Spot welding setup consists of a transformer, workpieces, two copper electrodes, and two tongs.
Depending upon the requirement, the transformer will be used either to step up or step down the voltage.
The power supply will be passed through the two Tongs to the electrodes.
The most commonly used electrode materials in resistance welding are Copper(Cu), Tungsten, Copper-Tungsten Alloy, etc.
Due to the application of pressure on the tongs, the heat is generated between the workpieces due to the passage of current and the formation of spot or nugget takes place.
Thereby a joint is formed between two workpieces.
Resistance Spot Welding working on the following concept:
Resistance Spot Welding is Used for:
The defects of Resistance Spot Welding are as follows.
The advantages of Resistance Spot Welding are as follows.
The disadvantages of Resistance Spot Welding are as follows.