Resistance welding – also known as electrical resistance welding (ERW) – is simply a method of joining two metal parts by interlocking at the point where the current and force are applied, by applying the required force and strong electric current.

Although it has different forms and applications such as spot welding, projection welding, seam welding, butt welding, this method does not require any additional material, which makes it a very efficient process.

Advantages

It is an efficient and low cost joining method.
It is open to a wide range of automation applications and development.
It is an environmentally friendly and healthy method due to its very low smoke emission.
Process times are very short.
No additional bonding material, filler wire or chemicals are needed.