Aerodynamic cold spraying working unit

Abstract

The invention relates to an aerodynamic cold spraying working unit. The aerodynamic cold spraying working unit comprises a closed spraying chamber and a supersonic cold spraying device; a generator and a dust collecting device for collecting dust in the spraying chamber are arranged in the spraying chamber, and a control chamber is arranged outside the spraying chamber; the spraying chamber comprises a first half cavity and a second half cavity; the first half cavity comprises two first side walls, a front wall and a first top cover; the second half cavity comprises two second side walls, a rear wall and a second top cover; and the first side walls are slidably connected with the second side walls. According to the working unit, by arranging the first half cavity and the second half cavitywhich are connected in a sliding mode, the spraying chamber is designed to be of a drawing type structure, the size of the spraying chamber is adjusted according to the size of a to-be-sprayed workpiece, and therefore the problem that the size of the to-be-sprayed workpiece is limited by the size of the spraying chamber is effectively solved; and the spraying chamber is designed to be of a closedstructure, the dust generated in the spraying process is recycled through the dust collecting device, and therefore environmental pollution is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of cold spraying, and in particular relates to an aerodynamic cold spraying working unit. Background technique [0002] Cold spraying is a surface spraying process in which the metal particles are not melted throughout the process. That is to use compressed air or other gases to accelerate the metal particles to the critical speed (supersonic speed) at a lower temperature (<1000°C), so that they hit the substrate at a high speed (300-1200m / s) in a completely solid state, passing through the particles and the substrate A process in which material is deposited by severe deformation at the interface. The lower gas temperature can avoid thermal effects such as oxidation, phase transformation, and grain growth in the powder in the conventional thermal spraying process. At the same time, a higher particle velocity helps the particles to undergo sufficient plastic deformation during the deposition process to o...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides an aerodynamic cold spraying work unit, which solves the problems of inflexible construction, easy generat

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