Coaxial nozzle for surface treatment by laser irradiation, with supply of materials in powder form
AssigneesElectricite de Strasbourg, S.A., Institut Regional de Promotion de la Recherche Appliquee
InventorsOlivier Freneaux, Jean B. Poulet, Olivier Lepre, Ghislain Montavon
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Abstract
A surface treatment nozzle for laser irradiation, with the supply of material in powder form is characterized in that it is essentially constituted, on the one hand, by a nozzle body (1) provided with a truncated conical passage (2) that converges in the direction of the outlet of the nozzle (3) along the propagation axis (6') of the laser beam (6) and, on the other hand, by a coaxial injection device (4) for guidance of the materials (5) in powder form carried by a transport fluid within the nozzle body (1) so as to improve the interaction between the incident laser beam (6) and the materials (5) in powder form.
Claims11
Coaxial nozzle for surface treatment by irradiation with a laser beam and a supply of materials in powder form, comprising:
- a nozzle body (1) having an outlet, said nozzle body being provided with a truncated conical passage (2) that converges in the direction of the outlet along an axis (6') of propagation of the laser beam (6);
- a coaxial injection device (4) which guides and shapes a jet (5) of materials in powder form carried by a transport fluid in said nozzle body (1), said coaxial injection device comprising a first truncated conical partition ring (11) mounted in the nozzle body (1);
- and a device (14) for the injection of a confining fluid (15) at an overpressure or for the generation of an underpressure in said treatment nozzle, in the form essentially of a second truncated conical partition ring (16) extending coaxially within the first partition ring (11), so as to improve the interaction between the laser beam (6) and the materials (5) in powder form.
Dependencies are inferred from the claim text.