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A precision coaxial powder feeding laser cladding nozzle

A technology of coaxial powder feeding and laser cladding, which is applied in the coating process and coating of metal materials, and can solve the problem of low powder utilization rate of precision laser cladding nozzles

Active Publication Date: 2020-07-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problem of low utilization rate of existing precision laser cladding nozzle powder, and provides a precision coaxial powder feeding laser cladding nozzle

Method used

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  • A precision coaxial powder feeding laser cladding nozzle
  • A precision coaxial powder feeding laser cladding nozzle
  • A precision coaxial powder feeding laser cladding nozzle

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specific Embodiment approach 1

[0029] Specific implementation mode 1: This implementation mode is a precision coaxial powder-feeding laser cladding nozzle, such as Figure 1-Figure 13 As shown, it is specifically composed of an inner ring nozzle 1, an outer ring nozzle 2 and a connecting piece 3;

[0030]The inside of the inner ring nozzle 1 is a frustum-shaped cavity 1-1 penetrating from top to bottom, the upper end of the frustum-shaped cavity 1-1 is a thick-mouthed end, and the lower end is a thin-mouthed end; The outside of the ring nozzle 1 is composed of a cylindrical threaded pipe 1-7, a 9-prism 1-6, a cylindrical gasket 1-3, a dispersed powder structure 1-2 and a smooth circular table 1-4 from top to bottom; The inner ring nozzle 1 has an integrated structure; the axes of the cylindrical threaded pipe 1-7, 9-prism 1-6, cylindrical gasket 1-3, dispersed powder structure 1-2 and smooth circular table 1-4 coincide ; The 9-prism 1-6 is a positive prism; the section radius of the cylindrical threaded pi...

specific Embodiment approach 2

[0041] Embodiment 2: This embodiment differs from Embodiment 1 in that: the outer wall of the smooth circular platform 1-4 is 0.3 mm to 0.4 mm away from the side wall of the bump 1-2-1. Others are the same as the first embodiment.

specific Embodiment approach 3

[0042] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the surface roughness Ra of the outer wall of the inner ring nozzle 1 is less than or equal to 1.6 μm. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a precision coaxial powder-feeding-type laser cladding nozzle, and relates to a powder-feeding-type laser cladding nozzle, aiming to solve the technical problem of low utilization rate of powder of existing precision laser cladding nozzles. The precision coaxial powder-feeding-type laser cladding nozzle comprises an inner ring nozzle, an outer ring nozzle and a connector;the inner ring nozzle is arranged in the outer ring nozzle, the side walls of nine protruded blocks of the inner ring nozzle are tightly attached to the inner wall of the lower portion of the outer ring nozzle, and the connector is arranged above the inner ring nozzle and the outer ring nozzle. The precision coaxial powder-feeding-type laser cladding nozzle has the advantages that a 9-prism of theinner ring nozzle can break up the powder, injected into the outer ring nozzle, into uniformly distributed powder; the powder falls onto the upper end surface of a dispersed powder structure of the inner ring nozzle, inclines towards the outer edge along the bevel, and falls off through a groove; the powder forms uniformly-gathered powder spots with a size of less than 0.5mm through gaps. When the laser cladding nozzle is used according to a suitable process, the utilization rate of the powder reaches 80% or more.

Description

technical field [0001] The invention relates to a powder-feeding laser cladding nozzle. Background technique [0002] In powder feeding laser cladding technology, powder utilization is a key factor affecting cladding cost and efficiency. The size of the converging powder spot of the existing laser cladding nozzle is usually 3mm-5mm, and the width of the cladding path of conventional cladding is about 2mm-4mm, which is similar to the size of the powder spot, so it can ensure a high powder utilization rate. However, for precision laser cladding and repair parts, such as tip repair of aviation blades, repair of damaged parts of aero-engine casings, etc., in order to control deformation and cladding size requirements, it is necessary to use lower heat input and narrower Cladding width. The cladding path width of precision cladding is usually less than 1 mm, and the utilization rate of powder is less than 20% when using the existing laser cladding nozzle, resulting in a lot of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 李俐群黄怡晨陶汪
Owner HARBIN INST OF TECH