METHOD OF WELDING PLATES HAVING DIFFERENT MELTING TEMPERATURES AND TOOL THEREFOR

摘要

A method for the assembly by welding of a first (12) and second (14) metal plate with different melting points is characteri in that it includes:- a) at least one first heating stage (E1) by means of an electromagnetic induction tool (10) during the course of which a determined zone (22) of the second plate (14) of the more refractory material is locally heated to a temperature slightly greater than that of the first plate (12) of the more easily melted material; and b) a consecutive assembly stage (E2) during which the plates (12, 14) are magnetically assembled to each other in the determined zone (22) by melting with the aid of an electromagnet. The electromagnetic induction tool (10) used in this method is also claimed and comprises a coil (16) that is fed by a sing feed device (24) selectively delivering an alternating current with a frequency of 150 kHz and a power of 50 kW or a continuous current with a voltage greater than 10 kV.