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Coaxial Powder Feed Nozzles for Strip Spots

A coaxial powder feeding and nozzle technology, applied in coating installation, process efficiency improvement, processing and manufacturing, etc., can solve problems such as application limitations and inability to directly use semiconductor lasers, to prevent high temperature oxidation, improve laser melting, etc. The effect of improving the coating efficiency and improving the coating quality

Inactive Publication Date: 2020-09-18
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, it can be seen that the output spot of high-power array semiconductor laser is strip-shaped, and the traditional coaxial powder feeding nozzle is a circular nozzle suitable for circular spot, which cannot be directly used for semiconductor laser, so side-axis feeding is often used. powder nozzle, making its application very limited

Method used

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  • Coaxial Powder Feed Nozzles for Strip Spots
  • Coaxial Powder Feed Nozzles for Strip Spots
  • Coaxial Powder Feed Nozzles for Strip Spots

Examples

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Embodiment

[0058] In this embodiment, a semiconductor laser with an output wavelength of 975 nm, an output power of 12 kW, and an output spot width of 36 mm is used. The connecting bracket is made of a 2 mm stainless steel plate to form a rectangular box structure with an inner width of 30 mm and a length of 50 mm. The vertical baffle is 3 high. It is 30mm, the inner protective gas inlet is set at the center of one side of the longitudinal baffle 3, the inner diameter is Ф6mm, the height of the lateral baffle 2 is 70mm, and a hole is opened at a height of 10mm from the side 2mm for the installation of manual knobs or shafts (of course also A micro stepping motor can be used), and a rotating shaft, namely the rotating shaft connector 5, is installed under the longitudinal baffle 3.

[0059] The single-side nozzle is made of red copper material with good thermal conductivity. The powder inlet port 8-1 is made of 3, which are located at 15mm, 25mm, and 35mm respectively. The diameter is Ф4mm...

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Abstract

The invention discloses a coaxial powder feeding nozzle suitable for a strip light spot, comprising a connecting bracket, two single-side nozzles, two rotating shaft connectors and a nozzle inclination adjusting device; the connecting bracket is used for connecting the light outlet of the laser, and the two The single-sided nozzles are symmetrically installed on both sides of the connecting bracket, the top of each single-sided nozzle is hinged with the connecting bracket through a shaft connector, and the single-sided nozzle can rotate around the shaft connector; The laser output port enclosed by the lower end is in the shape of a bar; the output ends of the powder spraying channel and the outer protective gas channel of the single-side nozzle are both bar-shaped. The coaxial powder feeding nozzle of the present invention can be applied to a semiconductor laser that generates strip-shaped light spots; at the same time, the relative position of the one-side nozzle can be realized by rotating the one-side nozzle with the rotating shaft connector as the axis under the adjustment action of the nozzle inclination adjusting device. Adjust within a certain range, so as to be able to adapt to different needs.

Description

technical field [0001] The invention relates to a nozzle for laser additive manufacturing, in particular to a coaxial powder feeding nozzle suitable for strip-shaped light spots. Background technique [0002] The powder feeding nozzle is one of the key components of the laser additive manufacturing system, which has a crucial impact on the quality of the laser additive manufacturing. The coaxial powder feeding nozzle has the characteristics of isotropic powder feeding flow and is suitable for 3D printing. and widely used. However, what are currently used and reported are coaxial powder feeding nozzles suitable for circular spots. These nozzles are widely used in laser additive manufacturing equipment with circular output spots such as various solid-state lasers, gas lasers, and fiber lasers. These industrial processing lasers are either expensive to implement, such as solid-state and fiber lasers, or expensive to operate, such as CO 2 In recent years, with the commercializ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/153B29C64/209B29C64/20B29C35/16B22F3/105B33Y30/00
CPCB29C64/153B29C64/209B29C64/20B29C35/16B33Y30/00B29C2035/1616B22F10/00B22F12/226B22F10/25B22F12/70B22F12/53Y02P10/25
Inventor 冯选旗
Owner NORTHWEST UNIV
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