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A light-powder simultaneous powder feeding nozzle for atmosphere protection

A nozzle and powder feeding technology, which is applied in the field of additive manufacturing and remanufacturing, and laser cladding, can solve the problems of oxide inclusion pores in the cladding layer, and achieve the effects of low cost, reduced oxidation, and strong oxidation resistance

Active Publication Date: 2022-03-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Under open conditions, the powder-carrying gas of the existing laser cladding powder feeding method introduces a large amount of oxygen into the molten pool due to the effect of entrainment and ejection, and the molten pool is oxidized, resulting in oxide inclusions, pores, etc. that affect the performance of the cladding layer. defect

Method used

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  • A light-powder simultaneous powder feeding nozzle for atmosphere protection
  • A light-powder simultaneous powder feeding nozzle for atmosphere protection
  • A light-powder simultaneous powder feeding nozzle for atmosphere protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 A light-powder co-channel powder feeding nozzle for atmosphere protection according to the present invention includes a nozzle main body 1 and a light-powder co-channel main channel 2, and the inside of the nozzle main body 1 is provided with a light-powder co-channel Road expansion channel 7 and at least one powder feeding channel 4, light-powder same-road expansion channel 7, light-powder same-road main channel 2 are all arranged axially along the nozzle body 1, wherein the upper end of light-powder same-road expansion channel 7 extends After reaching the top of the nozzle main body 1, it is detachably connected with the light outlet of the optical path system, and the lower end is connected with the upper end of the main channel 2 of the light-powder common path to form a coaxial light-powder common path through up and down; the powder feeding channel 4. The upper end extends to the outside of the nozzle main body and then connects to the powder feeding s...

Embodiment 2

[0028] Embodiment 2 A light-powder co-channel powder feeding nozzle for atmosphere protection according to the present invention comprises a nozzle main body 1 and a light-powder co-channel main channel 2, and the nozzle main body 1 is provided with two powder feeding channels 4, one Light-powder co-channel expansion channel 7 and water-cooling channel 8, the upper end of the nozzle body 1 is equipped with a protective mirror, and an inert gas is passed through to prevent the powder-carrying gas carrying metal powder from rising to pollute the optical system and damage the laser head.

[0029] The powder feeding channel 4 is on both sides of the nozzle body 1, and the powder feeding channel 4 is at an acute angle with the main channel 2 of the same path of light and powder, in order to reduce the rebound of the laser and the divergence of the powder when the powder is ejected from the powder feeding channel , The powder feeding angle should be as small as possible.

[0030] Th...

Embodiment 3

[0033] Embodiment 3 A light-powder co-channel powder feeding nozzle for atmosphere protection according to the present invention comprises a nozzle main body 1 and a light-powder co-channel main channel 2, and the nozzle main body 1 is provided with two powder feeding channels 4, one The light-powder common path expansion channel 7 and the water cooling channel, the light-powder common path main channel 2 is below the nozzle body 1, and is coaxial with the light-powder common path expansion channel 7, and the working air flow is in the light-powder path. After mixing with the main channel 2, it gradually stabilizes and approximates laminar flow; the light-powder co-channel expansion channel 7 is above the nozzle body 1; the water inlet hole 5 and the water outlet hole 6 are installed on the nozzle body The two sides of the nozzle are used to cool the nozzle; the connection hole 3 is installed on the top of the nozzle body 1, and is used to connect the optical path system of the...

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Abstract

The invention discloses a light-powder co-channel powder feeding nozzle for atmosphere protection, comprising a nozzle body and a light-powder co-channel main channel, the inside of the nozzle main body is provided with a light-powder co-channel enlarged channel and at least one powder feeding channel The channel, the expanded channel of the light-powder channel and the main channel of the same channel of light-powder are all arranged along the axial direction of the nozzle body, wherein the upper end of the enlarged channel of the same channel of light-powder extends to the top of the nozzle body and is detachably connected with the light outlet of the optical system , the lower end is connected with the upper end of the main channel of the light-powder channel to form a coaxial and up-and-down light-powder channel; ‑Fan Tonglu expands the channel and communicates with it. The beneficial effects of the present invention are: the powder path is built-in, and oxygen in the air outside the tube will not be introduced, and the working airflow is stabilized and sprayed out in an approximate laminar flow state, effectively reducing oxidation, and the light-powder path has low cost and oxidation resistance strong features.

Description

technical field [0001] The invention relates to a technical device for atmosphere protection in the fields of laser cladding, additive manufacturing and remanufacturing, in particular to a light-powder simultaneous powder feeding nozzle. Background technique [0002] The laser cladding process uses laser as the heat source to melt the powder material and the base material to form a molten pool, so that the two molten materials are combined in the dilution zone to form a metallurgical bonding coating preparation process. In the laser cladding process, the powder feeding methods can be roughly divided into lateral powder feeding, coaxial powder feeding and optical internal powder feeding. [0003] In the side powder feeding, the powder feeding nozzle is installed obliquely relative to the axis of the focused laser beam, and the alloy powder is obliquely thrown into the laser spot on the cladding layer. With the movement of the substrate and the continuous feeding of the powder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F3/105B33Y30/00
CPCC23C24/103B33Y30/00B22F10/00B22F10/32B22F10/25B22F12/20B22F12/53Y02P10/25
Inventor 姚建华杨高林张群莉冯亮
Owner ZHEJIANG UNIV OF TECH