Arrangement for adjusting a powder flow in relation to the central longitudinal axis of an energy beam

摘要

The invention relates to an arrangement for adjusting a powder flow with respect to the central longitudinal axis of an energy beam for a working head, which is designed for powder build-up welding, wherein means for two- or three-dimensional alignment of the powder supply with respect to the central longitudinal axis of the energy beam in a direction perpendicular to the central longitudinal axis of the energy beam aligned plane is present. From one side is directed to the area in which the particles of the powdery material meet, as a line-shaped beam. To this end, an optical detector array for spatially resolved detection of intensities is arranged perpendicularly and connected to an electronic evaluation unit, which is designed to determine the shape, size and / or length of an irradiated area in which spatially resolved intensities which exceed a predefinable threshold value with the optical detector array have been recorded. The irradiated area extends from the surfaces of particles to which the laser beam impinges with reduced power during the adjustment, up to a portion of the irradiated area, which is arranged in the direction of a workpiece surface accelerated powdery particles, in which the particles heated by the laser beam divergent move.