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Coaxial powder feeding nozzle suitable for strip-shaped light spots

A technology of coaxial powder feeding and nozzles, which is applied in coating devices, improvement of process efficiency, processing and manufacturing, etc., can solve the problems of application limitations, inability to directly use semiconductor lasers, etc., to prevent high temperature oxidation and improve laser melting Covering efficiency, increase the effect of uniformity

Inactive Publication Date: 2019-08-06
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 feeding nozzle suitable for strip-shaped light spots
  • Coaxial powder feeding nozzle suitable for strip-shaped light spots
  • Coaxial powder feeding nozzle suitable for strip-shaped light spots

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Embodiment

[0058] In this embodiment, a semiconductor laser with an output wavelength of 975nm, an output power of 12kW, and an output spot width of 36mm is used. The connecting bracket is made of a 2mm stainless steel plate to form a rectangular frame structure with an inner width of 30mm and a length of 50mm. The vertical baffle plate is 3 in height. 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 side baffle 2 is 70mm, and a hole is opened at a height of 10mm 2mm from the side for installing a manual knob or shaft (of course Also available micro-stepping motor), a rotating shaft is installed below the longitudinal baffle plate 3, i.e. the rotating shaft connector 5.

[0059] The one-side nozzle is made of red copper material with good thermal conductivity. Three powder inlets 8-1 are located at 15mm, 25mm, and 35mm respectively, with a diameter of Ф4mm. The powder mixing column 8-2 is a Ф1.2mm c...

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Abstract

The invention discloses a coaxial powder feeding nozzle suitable for strip-shaped light spots. The coaxial powder feeding nozzle includes a connection bracket, two single-side nozzles, two rotating shaft connectors and a nozzle inclination angle adjusting device. The connection bracket is used for connecting a light outlet of a laser. The two single-side nozzles are symmetrically mounted on the two sides of the connection bracket. The top end of each single-side nozzle is hinged to the connection bracket through the corresponding rotating shaft connector. The single-side nozzles can rotate onthe axis of the corresponding rotating shaft connectors. A strip-shaped laser output port is defined by the lower ends of the two single-side nozzles. Powder injection channels and outer protective gas channels of the single-side nozzles are all strip-shaped. The coaxial powder feeding nozzle of the invention can be suitable for a semiconductor laser generating strip-shaped light spots. Meanwhile,the single-side nozzles rotate on the axis of the rotating shaft connectors under the adjustment of the nozzle inclination angle adjusting device, and so the relative positions of the single-side nozzles can be adjusted within a certain range, thereby being able to adapt to different needs.

Description

technical field [0001] The invention relates to a laser additive manufacturing nozzle, 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 is suitable for 3D printing due to its isotropic powder feeding flow And get widely used. However, what are currently used and reported are coaxial powder feeding nozzles suitable for circular light spots. These nozzles are widely used in laser additive manufacturing equipment with circular output spots such as solid-state lasers, gas lasers, and fiber lasers. However, These industrial processing lasers are either expensive equipment, such as solid-state and fiber lasers, or high operating costs, such as CO 2 In recent years, with the commercialization of high-pow...

Claims

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Application Information

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Patent Type & Authority Applications(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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