Laser cladding head

Abstract

The invention discloses a laser cladding head. The laser cladding head comprises a spray head body, wherein the spray head body is of a hollow cylinder structure with openings in two ends; the upper end and the lower end of an inner cavity of the spray head body are a cylindrical cavity and a conical cavity which communicate with each other separately; the opening in the lower end of the spray head body is smaller than the opening in the upper end of the spray head body; the upper end of the spray head body is in sealing connection with a condensing lens; a powder channel and a protective gaschannel are arranged on the spray head body; the powder channel comprises a main channel and a plurality of charge channels; and a switching device used for switching the charge channels to communicate with the main channel is arranged on the spray head body. According to the laser cladding head disclosed by the invention, the plurality of charge channels can be independently opened to realize alternate filling of various powder, so that quick switching of filling of powder with different particle sizes is realized according to cladding needs; and moreover, non-stop powder filling and replacing is realized, so that processing continuity is guaranteed.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to a laser cladding head. Background technique [0002] Laser cladding technology refers to the use of high-energy laser beams to melt the added materials on the surface of the substrate to form a high-performance cladding layer that is metallurgically bonded to the substrate. The cost of laser cladding complete sets of equipment is expensive, and the cost of cladding materials has become an important issue to be considered. The preparation of cheap and high-quality cladding layers has become the key to the wide application of this technology. The price advantage of Fe-based cladding powder is obvious, but its corrosion resistance needs to be improved. VC reinforced Fe-based composite laser cladding layer has better wear resistance, but its corrosion resistance is relatively poor. The corrosion potential of the Fe matrix can be increased by alloying, but this increases the ...

AI Technical Summary

Problems solved by technology

However, during laser cladding, the existing nozzle has only one powder inlet channel, that is, it can only accommodate a single type of powder filling at the same time during processing, which is not conducive to changing the powder during the cladding process, that is, changing different particle sizes Therefore, it is necessary to develop a laser cladding head that can replace and fill powder at any time during the cladding process.

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