ALUMINIUM/COPPER HETEROGENEOUS WELDING

摘要

Method of assembling a first thin copper part and a second thin aluminum part, each to be welded using heterogeneous welding, includes placing the ends of the parts so that they face one another and pressing the ends against one another so as to constitute a welding zone extending therebetween; and applying an aluminum alloy by way of filler metal to the welding zone using a low energy welding method in which the electric arc and the meltable filler wire are wider than the combined thickness of the parts, the parts being held so as to maintain the welding zone at the top using a fixing element including at least two rigid blocks of a conductive material whose thickness is between 1 and 2 mm, whose length is greater than that of the parts and whose width is sufficient to hold the parts, and a pressure fixing system.

主权项

1. Method of assembly of a first thin part to be welded made of copper (1) and a second thin part to be welded made of aluminum (2) using heterogeneous welding, said parts having a thickness of less than 1 mm and said method comprising a stage consisting of arranging the ends of said parts (1, 2) to be assembled so that they face one another and pressing said ends against one another, so as to constitute a welding zone (3) extending along a welding zone (or line) between the parts (1, 2); and arranging an aluminum alloy as a filler metal in said welding zone (3) by a low-energy welding method in which the electric arc (4) and the meltable filler wire (5) are wider than the combined thickness of the parts (1, 2), said parts (1, 2) being held in such a way as to maintain the welding zone uppermost using a fixing means comprising:
a) at least two rigid blocks of a conductive material (6a, 6b) the thickness of which is comprised between 1 and 2 mm, the length of which is greater than that of the parts to be welded (1, 2) and the width of which is sufficient to hold said parts (1, 2) and b) a pressure fixing system allowing the blocks (6a, 6b) to be held against the parts (1, 2).