Powder feeding head for underwater laser additive manufacturing and cladding layer preparation

Abstract

The invention provides a powder feeding head for underwater laser additive manufacturing and cladding layer preparation. The powder feeding head comprises a first component, a second component, and athird component and a fourth component which are sequentially connected from top to bottom; the first component, the second component and an axis opening of the third component are communicated to form a laser cavity, and the axis opening of the first component is connected with a coaxial laser. According to the embodiment of the powder feeding head, a flow path of powder is distributed, so that metal powder enters from powder feeding screw holes, and sequentially pass through a powder flow passage, and a powder mixing chamber and a powder collision platform; the flowing speed of the metal powder is greatly reduced when the powder nozzle is reached by the metal powder, so that the time of laser acting between the metal powder and the laser cavity can be greatly prolonged, and the powder utilization rate is improved, so that the powder feeding head is suitable for underwater low-temperature long-time additive manufacturing, and the metal powder transmitted by the powder feeding head isbetter in heating effect, and the finished product effect of the laser additive manufacturing and the cladding layer preparation can be improved.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, in particular to a powder feeding head for underwater laser additive manufacturing and cladding layer preparation. Background technique [0002] With the development and increase of marine engineering and submarine industrial facilities, the loss and repair of many underwater metal products has become a problem that cannot be ignored, such as copper-based propellers for ships in the water, pipeline steel used for submarine pipelines, and anti-corrosion materials used by Express. Corrosion resistant coating etc. These components face the processes of chemical corrosion, electrochemical corrosion, biological corrosion and tidal corrosion under the harsh environment of the seabed, and the wear of the surface and the thinning and fracture of the structural parts will cause serious losses. Conventional repair methods, such as dock repair of ships and segmental water repair of sub...

AI Technical Summary

Problems solved by technology

[0005] At present, underwater synchronous laser additive manufacturing can be operated by a completely underwater dry method. Although this method can avoid the adverse effects of the water environment and try to create the same dry environment as the atmospheric environment, its shortcomings are relatively obvious. First of all, it is difficult to create a local dry environment, and the design and production costs of the completely dry pressure chamber are high; secondly, the additional pressure chamber will increase the load of the load robot, which will affect the cladding accuracy; finally, the partial dry method cannot be completely ruled out. The impact of the water environment cannot guarantee the relevant performance of the cladding layer

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