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Metal powder laser micro shaping gas protection device

A gas protection device and metal powder technology, applied in the laser micro field, can solve the problems of unsuitable metal powder application, etc., and achieve the effects of simple structure, stable protective atmosphere environment, and easy processing

Inactive Publication Date: 2008-07-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Micro and nano particles are extremely small in size, uniform in size, and have a large specific surface area. Therefore, micro and nano metal powders are easy to oxidize and must be protected by gas. The traditional gas protection method of blowing inert gas to the processing surface will cause the powder or Formed tiny components are blown away from the processing station and are therefore not suitable for use in metal powder laser microforming

Method used

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  • Metal powder laser micro shaping gas protection device
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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, introduce the content of the present invention in detail.

[0013] figure 1 Shown is a schematic diagram of the structure of the metal powder laser micro-molding gas protection device. The gas inlet 1 is connected to the protection gas pipeline. Cavity 6, due to the expansion of the caliber, the gas flow expands radially, and the gas will fill the interior of the gradually widening tubular cavity 6 and flow downward evenly. There are two holes on the gradually widening tubular cavity 6, respectively introducing optical focusing The head and the powder positioning transfer nozzle, according to the fluid properties, the surroundings of these two devices are filled with protective gas, and the overall flow direction of the gas is not changed. At the initial stage of introducing the protective gas into the device, the initial air components inside the gradually widening tubular cavity 6 are discharged. Due to the continuous i...

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Abstract

A gas protecting apparatus for microshaping the metal powder by laser is composed of inertial gas inlet, gas flow diffusing barrel, connection part between said gas inlet and diffusing barrel, a mesh structure in said diffusing barrel, and a gradually diffused conic tubular cavity with the entrances for optical focusing head and powder nozzle.

Description

technical field [0001] The invention belongs to the field of laser microtechnology, and in particular relates to a gas protection device for micro-molding of micro-nano metal powder by laser growth method. Background technique [0002] Laser microforming is different from stereolithography by photocuring, nor is it simple selective laser sintering. Laser microforming technology combines selective laser sintering rapid prototyping technology with micro-nano science and technology, laser technology, and computer control technology, and applies layered manufacturing ideas to directly form three-dimensional microstructures with finely focused laser melting micro and nano powders. Micro- and nano-powders are used for laser micro-forming, which has the advantages of high forming precision, small forming size, good mechanical properties, and safe operation. [0003] Micro-nano metal powder laser micro-forming technology is a laser processing technology that uses laser as a process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105
Inventor 左铁钏王旭葆武强
Owner BEIJING UNIV OF TECH