The welding by resistors is carried out by means of the electric current applied by pressure of two electrodes on the parts and at the melting temperature of these. The principle of operation of this process is to pass an electric current of great intensity through the metals that are going to join. Taking advantage of this energy and through a slight pressure the union between both sides is achieved.

Both heat and pressure are the main factors in this type of welding since it is necessary to have good contact between electrode and part in advance before applying heat, maintaining in contact the surfaces to join once their temperature is reached for the correct welding. Suitable for production and repair in industries such as: automotive, naval, railway, aeronautical, bodywork manufacturing, renewable energies among others.