Laser/powdered metal cladding nozzle

Details Laser/powdered metal cladding nozzle Laser/powdered metal cladding nozzle

B - Operations, Transporting

23

K

B23K 26/14 (2006.01)

Patent

CA 2182083

A laser powdered metal cladding apparatus (10) includes a removable conical nozzle (15) having a central opening (23) through which the laser beam and powdered metal exit the apparatus. The opening (23) extends to the front surface (53) of the nozzle that is in close proximity to the workpiece (25). Axial passageway (51) in the tapered wall of the nozzle extend rearward from the front surface (53) and are arranged in an array that is centered around the opening (23). Inert gas flows through these axial passageways (51) to cool the nozzle and to form an oxidation shield at the puddle of liquid metal (26). Wateror other cooling fluid is circulated through a water jacket (40) between apertures (41) to cool the apparatus (10). Powdered metal for cladding is delivered to a conical passage (35) at its inlets (36), and exits through the opening (23).

Un appareil laser (10) utilisant de la poudre métallique pour réaliser un placage comporte une buse conique amovible (15) ayant une ouverture centrale (23) pour le passage du faisceau laser et la projection de la poudre métallique. L'ouverture (23) s'étend jusqu'à la surface frontale (53) de la buse, laquelle jouxte la pièce traitée (25). Des passages axiaux (51) dans la paroi conique de la buse s'étendent vers l'arrière depuis la surface frontale (53) et ils forment un ensemble centré autour de l'ouverture (23). Un gaz inerte circule par ces passages axiaux (51) pour refroidir la buse et former un écran protégeant le métal liquide (26) contre une oxydation. On fait circuler de l'eau ou un autre fluide réfrigérant dans une chemise (40) entre les ouvertures (41), pour refroidir l'appareil (10). Le métal en poudre pour le placage est amené à un passage conique (35) par les entrées (36) et il sort par l'ouverture (23).

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