Laser brazing method and its device

Abstract

Abstract PURPOSE:To improve the absorption efficiency of a laser lean, and to remarkably reduce the cost by applying a pigment material which can absorb easily the laser beam, to the surface of a brazing filler metal, and executing the brazing. CONSTITUTION:To laser converging part 3, the brazing filler metal 4 of a prescribed wire diameter is guided by a conduit tube 5 and a chip 6, and fed by a prescribed brazing filler metal feeding device. In a cup 7 on the way of this feeding passage, a pigment material 8 which can absorb easily the laser beam, for instance, paste-like graphite is contained, and it is applied to the brazing filler metal 4 consisting essentially of copper, from a hole 9. As a result, the surface of the brazing filler metal is covered with the pigment material 8, therefore, it does not occur that the laser beam is reflected as usual, and the light absorption efficiency can be raised. Therefore, since the laser of a low output can be used, the initial cost and the running cost can be remarkably reduced.

Inventors

• 👤 Kazuo Azuma
• 👤 東　和男

Bibliographic Details