Method and apparatus for laser shock wave three dimensional highly false proof nondestructive marking

A shock wave and laser technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of poor anti-counterfeiting performance, unevenness, complicated operation, etc., and achieve the effect of non-destructive and high anti-counterfeiting.

Inactive Publication Date: 2007-12-26
JIANGSU UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Second, poor anti-counterfeiting performance
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

Method used

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  • Method and apparatus for laser shock wave three dimensional highly false proof nondestructive marking

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Embodiment Construction

[0020] The details and working conditions of the specific device proposed by the present invention will be described in detail below with reference to FIG. 1 .

[0021] The device comprises a laser generator, a beam spatial modulator (1), a liquid crystal mask (2), a lens (3), a part (4), and a control system. The laser beam spatial modulator consists of a concave lens, a convex lens and a homogenizer.

[0022] According to the size and material of the marked area of ​​the part, select a flexible film and stick the flexible film on the surface of the part; according to the requirements of the logo, draw a pattern with grayscale, display the pattern on the LCD screen to form a liquid crystal mask, and The liquid crystal mask is controlled by the computer to realize fast pattern transformation; the laser generator generates laser pulses with an energy of 10-100 joules and a duration of 8-80 nanoseconds. The light spot mode can be fundamental mode, multi-mode and other modes. T...

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Abstract

This invention relates to method for marking and identifying key parts, belonging to machine manufacture and laser device, especially for condition of averting surface failure, and bearing false proof ability, such as aerial metal parts. The invention is characterized in using laser impact wave as a force source to plastic deform material, and directly plastic deform metal parts; by changing grey scale of liquid crystal mask film, energy of laser burst, burst width and shape, and flexible plaster with different sizes to attain plastic deforming force in different time and space to generate tri-dimensional plastic deformation and actualize tri-dimensional high false proof ability of marking; generating a residual compressive stress at marking area and lower surface asperity without ablating parts surface, which guarantees the non-damage of laser impact wave marking.

Description

technical field [0001] The invention relates to the fields of mechanical manufacturing and laser devices, in particular to a method and a device for laser shock wave three-dimensional high anti-counterfeiting and non-destructive marking, which is especially suitable for marking and Identification, such as aerospace metal parts. Background technique [0002] The development of modern manufacturing presents two major trends. The first is multi-variety and small batches, which is the embodiment of people's increasing pursuit of personalization in material life. The development of the second aerospace and national defense industry has higher and higher requirements for the mechanical properties of parts, especially with the increase of the structure-to-weight ratio, the fatigue resistance of the parts is also higher and higher, and these key components need to be improved. Lifetime service tracking. In addition, counterfeiting is also rampant, and the number of counterfeit and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/00B23K26/18
CPCB23K26/0069B23K26/356
Inventor 张永康殷苏民周建忠鲁金忠冯爱新
Owner JIANGSU UNIV
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