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Laser coding process of high-reflection material

A laser coding and high reflection technology, applied in the direction of burning, etc., can solve the problem that the laser marking barcode of high reflection materials cannot be read, and achieve the effect of improving the reading rate and reading efficiency and being easy to use

Inactive Publication Date: 2010-09-15
武汉楚天激光(集团)股份有限公司
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a laser coding process for highly reflective materials, which greatly improves the reading efficiency, thereby solving the problem that the laser marking barcodes of highly reflective materials cannot be read

Method used

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Examples

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Embodiment Construction

[0018] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] A laser coding process for highly reflective materials of the present invention is specifically implemented as follows:

[0020] 1. For highly reflective materials, such as mirror metal, hard alloy and high-speed steel cutting tools and measuring tools. "Background processing" using laser light on highly reflective materials. This process method uses the particularity of the laser to make the highly reflective metal surface present countless equally spaced gasification pits, and each pit is hemispherical to roughen the surface of the marked workpiece to change the reflection of light mode, making parallel reflections diffuse. This is the first marker layer.

[0021] The specific process is: first use a group of high-power, low-frequency, and fast-marking laser beams to widen the overlap rate of the laser spots so that the spo...

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Abstract

The invention relates to a process of marking a bar code by using laser and discloses a laser coding process of a high-reflection material. In the laser coding process, in a first making layer, a group of high-power and low frequency laser beams with high marking speed are used for drawing back the overlapping coefficient of laser spots and enabling the spots to be arrayed close to a tangential spot circle; by evaporating a plurality of pits on the surface of the high-reflection material, a diffuse surface consisting of a plurality of spots is formed on the surface of the high-reflection material; and in a second marking layer, high-frequency and power laser beams with low marking speed are used, so that the overlapping coefficient of the spots of the high-reflection material in the unit area is increased, the action time of laser is prolonged, the surface of the high-reflection material is oxidized to generate metal oxides, the surface color of an oxidizing layer is deepened and the color of the part which is not oxidized is shallow and the surface of material is divided into two varied reflective surfaces with different colors. The invention solves the phenomenon that the laser marked bar code of the high-reflection material cannot be read and greatly improves the reading rate and the reading efficiency for marking bar codes on the metal.

Description

technical field [0001] The invention relates to a technology for laser marking barcodes. In particular, it relates to a laser coding process for highly reflective materials. Background technique [0002] The bar code was first proposed by N.T.Woodland of the United States in 1949. In recent years, with the continuous popularization of computer applications, the application of barcodes has been greatly developed. Bar codes can mark information such as the country of origin, manufacturer, product name, production date, book classification number, mail start and end location, category, date, etc., so they are used in many fields such as commodity circulation, book management, post and telecommunications management, and banking systems a wide range of applications. [0003] A barcode is composed of bars and spaces with different widths and different reflectivities, compiled according to certain coding rules (code system), and is used to express a set of graphic identifiers of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/24
Inventor 黄子龙孙文
Owner 武汉楚天激光(集团)股份有限公司
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