Laser-cladding nozzle

Abstract

The invention relates to a laser-cladding nozzle, and belongs to the technical field of laser processing. The nozzle is characterized in that a beam of laser is turned into two beams of laser through an effect of a beam splitter and the two beams of laser enter a molten pool from laser channels on the two sides of the nozzle; powder is fed into a powder chamber from multiple directions and do downward motion under the effect of a minitype air blower so that a uniform powder stream is formed under the effect of a powder separation sieve; the convergence accuracy of the periphery of the powder is guaranteed by a circle of collimation protecting gas; because an angle sensor arranged in the middle of the nozzle, the protection gas quantity can be increased when the nozzle inclines, the segregation, caused by gravity, of the powder is possibly reduced, annular protecting gas also exists at the periphery of the front end of the nozzle and can protect the molten pool in a coverage manner; a middle nozzle can cool the nozzle by using a spiral cooling water channel; due to a protective cover of the end part, full reflection of the laser is facilitated and work returning pieces and powder can be fully utilized; a cooling water path for cooling in time is also arranged on the protective cover. The laser-cladding nozzle has a simple structure and is high in powder convergence accuracy; moreover, the light-powder coupling accuracy is improved, and the collimation property and the utilization rate of the powder can be improved.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a laser cladding nozzle. Background technique [0002] Laser cladding technology emerged in the 1980s and is an advanced surface strengthening, modification and repair technology for metal parts. Specifically, it refers to placing the selected coating material on the surface of the coated substrate with different filler methods, melting it and a thin layer of the substrate surface at the same time through laser irradiation, and forming a very low dilution after rapid solidification and blending with the substrate material. Forming a metallurgically bonded surface coating, thereby significantly improving the wear resistance, corrosion resistance, heat resistance, and oxidation resistance of the base material surface. [0003] The most commonly used powder feeding method for laser cladding technology is synchronous powder feeding. These include the side-axis powder feeding method ...

AI Technical Summary

Problems solved by technology

However, the powder flow is fed at an angle after all, and the powders collide with each other when they converge at the converging point. At the same time, there will be turbulent airflow in the shielding gas to disturb the converging of the powder. Various factors make the effect of the powder in the actual converging process unsatisfactory.

and most nozzle designs are too complex to take advantage of practical production applications

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