Laser marking method

A laser marking method and laser marking machine technology, which are applied in the field of laser marking, can solve the problems of large losses and high prices, and achieve the effects of improving the degree of diffuse reflection, clear edges of marks, and enhancing the scanning recognition rate

Inactive Publication Date: 2016-06-15
丁雪强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver is a precious metal and is expensive. Once it is counterfeited, no matter whether it is a consumer, a manufacturer or a seller, the loss will be great.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The laser is a semiconductor laser marking machine.

[0038] The laser marking method for enhancing the scanning recognition rate on the silver surface of the present embodiment includes the following steps: firstly, the silver product is fixed on the workstation of the semiconductor laser marking machine, and then the parameters of the semiconductor laser marking machine are set as follows:

[0039] Focal length: 160mm

[0040] Pulse width: 8us

[0041] Pulse frequency: 6KHz

[0042] Laser current: 10.4A

[0043] Laser frequency: 5KHz

[0044] Movement speed: 150mm / s

[0045] Whether to fill: fill

[0046] Filling angle: 75°

[0047] Fill Line Distribution: Average Distribution

[0048] Whether to reverse: reverse

[0049] All around: 1mm;

[0050]After completing the first marking, modify the parameters of the marking machine as follows:

[0051] Laser current: 10.4A

[0052] Laser frequency: 12KHz

[0053] Movement speed: 300mm / s

[0054] Whether to fill...

Embodiment 2

[0062] The laser marking method for enhancing the scanning recognition rate on the silver surface of the present embodiment includes the following steps: firstly, the silver product is fixed on the station of the semiconductor laser marking machine, and then the parameters of the semiconductor laser marking machine are set as follows:

[0063] Focal length: 160mm

[0064] Pulse width: 5us

[0065] Pulse frequency: 4KHz

[0066] Laser current: 10A

[0067] Laser frequency: 4KHz

[0068] Movement speed: 180mm / s

[0069] Whether to fill: fill

[0070] Filling angle: 75°

[0071] Fill Line Distribution: Average Distribution

[0072] Whether to reverse: reverse

[0073] All around: 1mm;

[0074] After completing the first marking, modify the parameters of the marking machine as follows:

[0075] Laser current: 10A

[0076] Laser frequency: 10KHz

[0077] Movement speed: 450mm / s

[0078] Whether to fill: fill

[0079] Filling angle: 75°

[0080] Fill Line Distribution:...

Embodiment 3

[0086] The laser marking method for enhancing the scanning recognition rate on the silver surface of the present embodiment includes the following steps: firstly, the silver product is fixed on the station of the semiconductor laser marking machine, and then the parameters of the semiconductor laser marking machine are set as follows:

[0087] Focal length: 160mm

[0088] Pulse width: 4us

[0089] Pulse frequency: 6KHz

[0090] Laser current: 9.4A

[0091] Laser frequency: 2KHz

[0092] Movement speed: 250mm / s

[0093] Whether to fill: fill

[0094] Filling angle: 75°

[0095] Fill Line Distribution: Average Distribution

[0096] Whether to reverse: reverse

[0097] All around: 1mm;

[0098] After completing the first marking, modify the parameters of the marking machine as follows:

[0099] Laser current: 9.4A

[0100] Laser frequency: 8KHz

[0101] Movement speed: 600mm / s

[0102] Whether to fill: fill

[0103] Filling angle: 75°

[0104] Fill Line Distribution...

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PUM

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Abstract

The invention relates to a laser marking method. The laser marking method includes the following steps that firstly, parameters of a semiconductor laser marking machine are set, and first-time marking is carried out on a polished silver product; and secondly, the parameters of the laser marking machine are modified, and second-time marking is carried out. The laser marking method which can improve the scanning recognition rate on the surface of silver is characterized in that two or more than two times of stacked laser etching with different power, different frequencies and different rates are carried out, the distribution density of irregular grooves of marking line segments is greatly increased and reaches 70/MM or higher, the grooves can be stacked or intersected, and the diffuse reflection degree is greatly improved; and the marking edges are clearer, reflection rays in marking regions and reflection rays in non-marking regions form strong edge comparison, and the scanning recognition rate of the surface of the silver is accordingly strengthened.

Description

technical field [0001] The invention relates to the technical field of laser marking, in particular to a laser marking method for enhancing the scanning recognition rate on the silver surface. Background technique [0002] Laser is a kind of light source that utilizes stimulated radiation (energy level transition), has high brightness, high energy, and has excellent frequency and directional performance indicators such as monochromatic, unidirectional, and single-phase. Compared with ordinary light sources, one is that its directional illumination is ten million times stronger than that of ordinary light sources; the other is that the energy is highly concentrated and can act on a tiny point. The light wave is absorbed by the material to generate instantaneous high pressure and high temperature, and the temperature can be as high as tens of thousands to several The high temperature of one million degrees; the third is that the wavelength is limited to the spectral range of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/00
CPCB41M5/0058
Inventor 不公告发明人
Owner 丁雪强
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