Snecma Moteurs

Snecma

Hervé Launais

Pascal Aubry

Thierry Flesch

Sophie Martine Jobez

Dominique Mignot

Michel Allouard

Sophie Hertmanowski

Bruno Debeze

Thierry Dubois

Sophie Jobez

A method for laser welding at least two metal parts, wherein the parts are welded along a weld area, includes simultaneously applying a continuous laser beam and a pulsed laser beam onto the weld area. The action of the pulsed laser is added to that of the continuous laser; with the continuous laser, it is possible to establish a stable molten bath in the weld area, the pulsed laser by its large peak energy, facilitating penetration of the energy and therefore of the molten bath, which allows deeper welding. A device for implementing the method is also disclosed.

Method and apparatus for laser welding using a CW laser beam combined with a pulsed laser beam

The method is used to attach the various parts of a 'T' assembly using a single laser welding pass from the outside of the 'T' assembly. Welding is done with a bifocal welding head () the two axes () of which are parallel to a surface of the part forming the &#x201c;T&#x201d; stem (), the weld being made along the entire length of the assembly. To be used when manufacturing vanes for a turbo jet fan duct.

Single-pass laser welding method of a T assembly of metallic parts

The invention provides a welding device () using a power laser beam (), the device () being miniaturized, the device () being suitable for being moved very close to the surface () of the part () to be welded and of reaching welding zones that are difficult to access, but without vapor and particles of molten metal () being capable of penetrating into the inside and dirtying the optical components (). Such a device is remarkable in that it includes a feed () of gas under pressure suitable for producing a primary flow of gas () leaving via the front opening () together with the laser beam (), and in that it also includes a nozzle () connectable to a source of gas under pressure, said nozzle () producing a secondary flow of gas () sweeping the front opening () transversely, thereby deflecting the primary flow of gas () laterally.

Welding unit with miniaturized laser beam

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Brunoy, France

Hervé Launais