Adjustable laser coaxial powder-feeding nozzle

A coaxial powder feeding and adjustable technology, which is applied in the direction of spraying devices and liquid spraying devices, can solve the problems of powder accumulation inside the nozzle, poor powder ejection at the outlet, blockage of the nozzle, and powder deposition, etc., to improve the universality of the equipment High performance, large adjustment range and compact structure

Inactive Publication Date: 2011-05-18
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology

[0004] In Chinese patent CN2510502Y, a coaxial powder feeding nozzle is proposed, the main parts of which are connected by bolts. Although the laser focus can be properly adjusted relative to the powder convergence point, there is no scale value for quantification, and the size of the powder conical cavity at the lower end can be adjusted. Adjustment, but after adjustment, powder deposition is easy to occur at the connection, and the adjustment value cannot be measured. This patent is only applicable to circular laser spots, not to square laser spots
U.S. Patent 4724299 proposes a coaxial powder feeding nozzl...

Method used

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  • Adjustable laser coaxial powder-feeding nozzle
  • Adjustable laser coaxial powder-feeding nozzle
  • Adjustable laser coaxial powder-feeding nozzle

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Embodiment Construction

[0017] The present invention connects the laser device and the powder cylinder 5 respectively by the connecting cylinder 2 marked with the scale, and utilizes the screw thread to form a mechanism that can be adjusted vertically up and down. The cone 10 and the outer cone 11 of the circular outlet are respectively connected to the upper body by threads. One group is composed of the inner cone 15 of the square outlet coaxially distributed, the middle cone 16 of the square outlet, and the outer cone 17 of the square outlet. According to different laser spot types, the lower body of the corresponding outlet is installed to realize the adjustment of the belt-shaped or circular powder fusion coating.

[0018] The lower body is composed of three coaxially distributed cones with rectangular outlets. Three bosses are evenly distributed on the inner walls of the middle cone 16 of the square outlet and the outer cone 17 of the square outlet. The inner cone 15 of the square outlet and the ...

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Abstract

The invention relates to an adjustable laser coaxial powder-feeding nozzle suitable for round-spot laser fluxing and broadband laser fluxing, belonging to the technical field of laser processing. The nozzle has a water-cooling and guiding gas protection structures, is integrally in a hollow conical structure and comprises an upper body and a lower body which are sequentially connected and fixed by a thread. The adjustable laser coaxial powder-feeding nozzle is structurally characterized by being formed by respectively connecting a connecting tube with scale with a laser and a powder-feeding tube, a mechanism capable of vertically adjusting is formed by utilizing the thread, and the powder focus position is accurately adjusted; the lower body comprises one group of three coaxially distributed cones with round outlets and one group of three coaxially distributed cones with rectangular outlets to adjust different facula shapes, different types of faculae are mounted at the lower parts of corresponding outlets, an included angle between a powder channel and the nozzle axis ranges from 40 degrees to 50 degrees, and an included angle between a cooling water channel and the nozzle axis ranges from 30 degrees to 45 degrees.

Description

Technical field: [0001] The invention relates to an adjustable coaxial powder feeding nozzle for laser melting, which is suitable for circular spot laser melting and broadband laser melting, and belongs to the technical field of laser processing. Background technique: [0002] Laser cladding technology is a new technology that has been studied more, developed rapidly, and widely used in laser heat treatment. It is considered to be a new and promising surface modification technology. The powder feeding system is a very important system in the laser cladding system. Laser cladding can be divided into preset and synchronous laser cladding according to the powder feeding method. The synchronous powder feeding method is a relatively advanced and widely used method at present. The powder feeding device used for synchronous powder feeding mainly has two types: unilateral powder feeding and coaxial powder feeding. Among them, the single-side powder feeding method is widely used as...

Claims

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Application Information

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IPC IPC(8): C23C24/10B05B7/14
Inventor 刘衍聪赵江伊鹏石永军李继涛王斌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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