Laser etching aluminum alloy surface texturing method

A technology of aluminum alloy surface and laser etching, which is applied in the direction of laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of long cycle time, expensive coating cost, environmental pollution, etc., and achieve increased adhesion and surface roughness Effect

Active Publication Date: 2020-01-10
CIVIL AVIATION FLIGHT UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] When the above-mentioned existing method needs to improve the adhesion of the aluminum alloy skin surface coating, the cost of developing a new type of coating is expensive and the cycle is long; the waste liquid produced by the chemical method on the surface of the aluminum alloy has the disadvantage of greatly polluting the environment. The purpose is to provide a method for laser etching aluminum alloy surface texture, by changing the scanning path of the laser to etch the texture structure on the aluminum alloy surface, so as to increase the surface roughness and surface wettability of the aluminum alloy skin, so as to achieve Increase the adhesion of aluminum alloy surface coating

Method used

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  • Laser etching aluminum alloy surface texturing method
  • Laser etching aluminum alloy surface texturing method
  • Laser etching aluminum alloy surface texturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 and figure 2 As shown, a method for laser etching the surface texture of aluminum alloy, the method includes using the vibrating mirror in the laser processing device to control the scanning path of the laser, etching different textured surfaces on the surface of the aircraft aluminum alloy skin, and scanning The speed is 2000mm / s, the frequency is 90kHz, the pulse width is 0.35μs, the number of scans is 1, the spacing is 0.3mm, the spot diameter is 50μm, and the power is 24W; the diameter of the pit produced by the laser on the surface of the aircraft aluminum alloy skin is 50μm, and the shape of the pit is similar It is circular, the pits are superimposed to form a scanning path, and the textured surface is diamond-shaped.

Embodiment 2

[0041] Such as figure 1 and image 3 As shown, the pit diameter is 45 μm, the texture surface is square, and the rest are the same as in Example 1.

Embodiment 3

[0043] Such as figure 1 and figure 2 As shown, the pit diameter is 50 μm, and the texture surface is diamond-shaped, and the rest are the same as in Example 1.

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Abstract

The invention provides a laser etching aluminum alloy surface texturing method, and belongs to the technical field of aircraft aluminum alloy skin processing. The method includes the steps that a galvanometer in a laser processing device is adopted to control a laser scanning path; and different texturing surfaces are etched on the aircraft aluminum alloy skin surface, the scanning speed is 2000 mm/s, the frequency is 90 kHz, the pulse width is 0.35 microsecond, the number of scanning is one, the space is 0.3 mm, the spot diameter is 50 microns, and the power is 24 W. By changing the laser scanning path, the texturing structures are etched on the aluminum alloy surface, so that the surface roughness and the surface wetting performance of aluminum alloy skin are increased, and the adhesionforce of an aluminum alloy surface coating is increased.

Description

technical field [0001] The invention relates to the technical field of aircraft aluminum alloy skin processing, in particular to a method for laser etching aluminum alloy surface texture. Background technique [0002] In order to improve the weather resistance, chemical resistance, and corrosion resistance of aircraft aluminum alloy skin, it is necessary to spray special aviation coatings on the surface of aircraft aluminum alloy skin. Improving the adhesion of aluminum alloy skin surface coating has always been a hot spot in the field of civil aviation research. one. The development of new coatings is not only expensive, but also takes a long time. In order to increase the adhesion of coatings, surface modification of aluminum alloy skins has become an economical and effective method. [0003] The surface treatment of aluminum alloy by chemical method requires degreasing, pickling, cleaning and other processes, but the waste liquid produced by chemical method has great pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/362B23K26/70
CPCB23K26/362B23K26/702B23K26/3584
Inventor 李绍龙杨文锋侯秋园刘畅张殊伦李佐钱自然付蝉媛
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA
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