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Method and device based on micro-nano laser-induced shock wave three dimensional lossless makr

A technology of laser shock and shock wave, which is applied in the direction of laser welding equipment, digital marking record carrier, record carrier used by machines, etc. It can solve problems such as unevenness, uneven spatial distribution of pulse laser, liquid crystal absorption spectrum, and inability to mark complex graphics. Achieve the effect of non-destructive and three-dimensional high anti-counterfeiting

Inactive Publication Date: 2008-06-18
JIANGSU UNIV
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Problems solved by technology

The operation is complicated and uneven, it is difficult to ensure the high definition of the logo, and it is not suitable for three-dimensional space surface
(3) The mark is simple, using binary code to form a matrix mark that can be recognized by the barcode machine, it cannot mark complex graphics, and the anti-counterfeiting is not too high
[0005] Due to the uneven spatial distribution of the pulsed laser, the absorption spectrum of the liquid crystal, the gray scale of the liquid crystal itself, the directionality of the plasma explosion, and the laser diffraction at the micro-nano level, the above-mentioned patents have brought great challenges to accurate three-dimensional marking. greater difficulty

Method used

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  • Method and device based on micro-nano laser-induced shock wave three dimensional lossless makr
  • Method and device based on micro-nano laser-induced shock wave three dimensional lossless makr

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Embodiment Construction

[0025] The details and working conditions of the specific device proposed by the present invention will be described in detail below in conjunction with FIG. 1 .

[0026] The device includes computer control system 1, laser generator 2, beam space modulator 3, constrained layer 4, absorbing layer 5, parts 6, five-axis worktable (including fixture) 7, CCD identification information acquisition device 8 and identification conversion system 9. The spatial modulator is composed of concave lens, convex lens and homogenizer.

[0027] According to the size, pattern and material of the marking area of ​​the part 6, the constraining layer 4 is selected, and the absorbing layer is pasted on the surface of the part 6; according to the requirements of the marking, the trajectory of the laser shock is controlled by a programmable control technology, and controlled by a computer, and According to the complexity of the pattern and the depth of plastic deformation, select the pulse energy, pu...

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Abstract

Disclosed is a three-dimensional lossless marking method and device based on micro-nano laser shock wave, relating to the mechanical manufacturing and laser component field. The laser shock wave is taken as the force source that makes the plastic deformation of material; the required mark is formed based on the micro-nano laser shocked light spot and by multiple shock along the track controlled by computer programme, and has the functions of mark information acquisition and recognition conversion. The invention uses the laser shock track that can be controlled by programming and the control of laser parameter of the micro-nano laser light spot shock to realize the three-dimensional high anti-falsification and the lossless property of the laser shock wave marking.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing and laser devices, in particular to a method and device for three-dimensional non-destructive marking based on micro-nano laser shock waves, and is especially suitable for marking key parts that require no damage to the surface state of the parts and high anti-counterfeiting and identification, such as aerospace metal parts. Background technique [0002] Modern times have put forward new requirements for part marking: non-destructive, high anti-counterfeiting, and durable. The marking and identification of parts is an indispensable and important link in the production process. In the early days, ink marking was widely used, but it has been eliminated because it is easy to fade, not durable and has no anti-counterfeiting effect. Steel code embossing is also a method used in the production workshop, but it has the disadvantages of seriously damaging the surface state of parts, unstable clar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/18B23K26/42G06K1/12G06K19/06B23K26/70
Inventor 鲁金忠张永康张朝阳姚辉学王伟姚红兵
Owner JIANGSU UNIV
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