A nozzle for realizing synchronous composite forming of laser cladding and cold spraying

Abstract

The invention discloses a nozzle capable of achieving laser cladding and cold spraying synchronous compound forming. The nozzle comprises a laser cladding nozzle. A powder feeding opening, a mid-way protective gas inlet and a cooling gas inlet are formed in the feeding end of the laser cladding nozzle. The outer side of the discharging end of the laser cladding nozzle is connected with a molten bath protection cover through a thread. A cooling pipeline is wound on the surface of the molten bath protection cover. The molten bath protection cover is connected with cold spraying variable angle follow-up devices through fastening bolts. The cold spraying variable angle follow-up devices are connected with cold spraying nozzles through cold spraying nozzle clamp nuts. Nozzle cooling gas passesthrough the laser cladding nozzle and the cooling pipeline and finally is used as a cold spraying gas source of the cold spraying nozzles, and cooling in the laser cladding process and preheating of the cold spraying gas source are realized. By adoption of the molten bath protection cover, airflow interference between the cold spraying forming process and the laser cladding deposition forming process is reduced, and waste heat in the laser cladding process is fully utilized. The nozzle capable of achieving laser cladding and cold spraying synchronous compound forming has the advantages of being intensive and capable of saving energy.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to a nozzle for realizing synchronous composite forming of laser cladding and cold spraying. Background technique [0002] Laser cladding deposition forming and cold spray forming are common processing and forming technologies in the field of metal additive manufacturing. Currently, the nozzles used for processing and forming have a single structure and function. For example, most laser cladding technologies use coaxial powder feeding nozzles. The flow converges at the focal point of the laser to form a molten pool, and a single laser cladding deposition is realized; while the cold spray technology uses a Laval nozzle, whose function is to accelerate the powder speed to supersonic speed to realize the combination of powder and matrix to achieve cold spray forming manufacturing process. At present, there is no nozzle that combines the two kinds of nozzles...

AI Technical Summary

Problems solved by technology

At present, there is no nozzle that combines the two nozzles to realize simultaneous composite forming of laser cladding and cold spraying.

In addition, the composite form of nozzles cannot be simply superimposed, and simple superimposed nozzles for laser cladding and cold spray composite forming will have defects and deficiencies in the forming process

First of all, the simple superimposed composite nozzle cannot realize the synchronous composite processing of laser cladding and cold spraying. When the processing path changes, the simple superimposed composite nozzle does not have the function of following the cold spray nozzle and the laser cladding nozzle

Secondly, cold spraying technology has the advantages of high processing efficiency and good mechanical properties, and laser thermal cladding has the advantages of high processing accuracy and high bonding surface strength. The advantages of the two cannot be combined by simply superimposing composite nozzles.

Finally, simple nozzle compounding adds weight to the nozzle, takes up space

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