NOZZLE FOR LASER POWDER BUILD-UP WELDING

摘要

A nozzle for laser powder build-up welding, in particular, an annular powder channel for feeding powdery material into a processing region in front of the laser outlet opening, wherein the powder channel is designed in such a way that the angle included between the radially outer wall of the powder channel and the axis of the powder channel is constant or decreases in the direction of the material outlet opening at least in the region extending from the at least one material inlet opening to the material outlet opening is provided.

主权项

1. A nozzle for laser powder build-up welding, comprising a sleeve-shaped nozzle body in which an axial through opening for a processing laser beam, having a laser-entry opening at the rear side thereof and a laser-exit opening at the front side thereof, is configured, wherein the through opening is tapered toward the laser-exit opening and, for the supply of pulverulent material into an operating region ahead of the laser-exit opening, has an annular powder duct which surrounds the through opening across at least part of the axial length thereof and extends coaxially thereto, said operating region having at least one material-entry opening in the radially outer wall thereof and a material-exit opening which is defined by the open front end-side of the powder duct, and tapering toward the front, wherein the powder duct is configured in such a manner that the angle enclosed between the radially outer wall of the powder duct and the axis of the powder duct is constant at least in the region which extends from the at least one material-entry opening up to the material-exit opening, or decreases in the direction of the material-exit opening.