heating is caused, thanks to the joule effect, by the passing in a conductive material of a high intensity current.
Using analogous transformers to those of the welding electrical worker for resistance it is possible to obtain heatings useful in order to realize heating operations as bending, forging, hardening, etc.


with special pliers endowed of electrodes, generally of coal, connected to the secondary of a transformer in a position to distribute strong intensities of lowest tension currents, of the 10V order, it is possible to transmit the heat created in the electrodes, because of the elevated current that covers them, to the piece on which one agrees to carry out the brazing thanks to a temperature higher than fusion temperature of the contribution material used.