A coaxial powder feeding nozzle that adjusts the focal point of powder flow in a pneumatic way

Abstract

The invention discloses a coaxial powder feeding nozzle which adopts a pneumatic method to adjust the focal point of powder confluence, including a laser head, a sleeve, a coaxial powder feeding head, a powder feeding chamber, a water cooling jacket, and a water cooling chamber. Sleeve, the coaxial powder feeding head is connected to the lower part of the sleeve; a focusing mirror is arranged above the sleeve, and a protective mirror is arranged on the upper end of the coaxial powder feeding head; the powder feeding chamber is between the outer wall of the coaxial powder feeding head and the water cooling jacket. The conical ring-shaped cavity formed between; the powder feeding chamber is divided into an inner cavity and an outer cavity by a separation plate and an adjustment paddle, and the water cooling chamber is connected with a water inlet and a water outlet; the adjustment paddles are multiple, Evenly distributed along the circumferential direction and connected to the lower end of the isolation plate, the adjustment paddle can be deflected relative to the coaxial powder feeding head. The coaxial powder feeding nozzle of the present invention realizes the adjustment of the focus point of the powder flow in a pneumatic manner, and has the advantages of simple structure, sensitive response, large adjustment range and the like.

Description

technical field [0001] The invention belongs to the field of advanced laser manufacturing, and in particular relates to a coaxial powder feeding nozzle which can pneumatically adjust the focal point of powder converging. Background technique [0002] The preparation of high-performance alloy coatings on the surface of key parts is of great significance to improving the service life of parts and the reliability of mechanical products. The alloy coating prepared by synchronous powder-feeding laser cladding technology has the advantages of high bonding strength, small dilution rate, small heat-affected zone and thermal deformation of parts, strong material adaptability, and easy realization of automatic production. Therefore, synchronous powder feeding laser cladding technology has gradually become a widely used material surface modification technology. [0003] In synchronous powder feeding laser cladding technology, powder delivery is a key link in the process. There are ma...

AI Technical Summary

Problems solved by technology

Generally, the focus point of the powder flow is not adjustable, which affects the application of the coaxial powder feeding method on the surface of complex shapes.

Images