Laser marking method for increasing salt spray corrosion resistance of two-dimension codes on surface of aluminum alloy

A technology of aluminum alloy surface and laser marking, applied in the field of laser marking, can solve the problems of DM code edge or module blurring, unclear, data loss, etc., achieve small contrast drop, avoid pollution, and improve salt spray corrosion resistance Effect

Inactive Publication Date: 2012-11-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to solve the problems existing in the prior art, the present invention proposes a laser marking method for improving the salt spray corrosion resistance of the two-dimensional code on the surface of the aluminum alloy. The edge of the DM code marked on the aluminum alloy surface or the module is blurred, unclear, and even part of the data in the code area is completely lost, so that the DM code on the aluminum alloy surface can be effectively protected, and the durability of the laser directly marking the DM code on the aluminum alloy can be improved. Salt spray corrosion performance

Method used

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  • Laser marking method for increasing salt spray corrosion resistance of two-dimension codes on surface of aluminum alloy
  • Laser marking method for increasing salt spray corrosion resistance of two-dimension codes on surface of aluminum alloy
  • Laser marking method for increasing salt spray corrosion resistance of two-dimension codes on surface of aluminum alloy

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Effect test

Embodiment 1

[0060] In this embodiment, the aluminum alloy sheet material with the grade of 2A12 is selected as the aluminum alloy test piece to be marked, and its specification is Ф50*5mm.

[0061] The steps of this embodiment are:

[0062] Step 1: Determine the laser marking process parameters:

[0063] Step 1.1: Grinding the marked surface of the aluminum alloy test piece, so that the surface roughness of the marked surface meets the marking requirements of the laser marking machine. The surface roughness of the marked face in this embodiment is about 3.2 μm;

[0064] Step 1.2: Use Han's YLP-D10 fiber laser marking machine to mark the DM code on the marking surface, the code word is "30Q324343430794

[0065] Step 1.3: Adjust the laser marking process parameters of the laser marking machine, repeat step 1.2 until the overall quali...

Embodiment 2

[0083] In this embodiment, the aluminum alloy sheet material with the grade of 2A12 is selected as the aluminum alloy test piece to be marked, and its specification is Ф50*5mm.

[0084] The steps of this embodiment are:

[0085] Step 1: Determine the laser marking process parameters:

[0086] Step 1.1: Grinding the marked surface of the aluminum alloy test piece, so that the surface roughness of the marked surface meets the marking requirements of the laser marking machine. The surface roughness of the marked face in this embodiment is about 3.2 μm;

[0087] Step 1.2: Use Han's YLP-D10 fiber laser marking machine to mark the DM code on the marking surface, the code word is "30Q324343430794

[0088] Step 1.3: Adjust the laser marking process parameters of the laser marking machine, repeat step 1.2 until the overall quali...

Embodiment 3

[0105] In this embodiment, the aluminum alloy sheet material with the grade of 2A12 is selected as the aluminum alloy test piece to be marked, and its specification is Ф50*5mm.

[0106] The steps of this embodiment are:

[0107] Step 1: Determine the laser marking process parameters:

[0108] Step 1.1: Grinding the marked surface of the aluminum alloy test piece, so that the surface roughness of the marked surface meets the marking requirements of the laser marking machine. The surface roughness of the marked face in this embodiment is about 3.2 μm;

[0109] Step 1.2: Use Han's YLP-D10 fiber laser marking machine to mark the DM code on the marking surface, the code word is "30Q324343430794

[0110] Step 1.3: Adjust the laser marking process parameters of the laser marking machine, repeat step 1.2 until the overall quali...

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Abstract

The invention provides a laser marking method for increasing salt spray corrosion resistance of two-dimension codes on a surface of an aluminum alloy. A DM code bottom layer is formed by directly marking with laser on an aluminum plate substrate; a square pattern is made on wax paper by using a thermo-sensitive method; the square pattern is larger than specification of existing DM codes on the surface of an aluminum plate; electrochemical etching is carried out in a DM code area of the aluminum plate by using an electrochemical etching method with the wax paper as a template to form a layer of oxidation film having protection function, so that a DM code mark with salt spray corrosion resistance is formed. Compared with the DM code mark directly marked on the surface of the aluminum alloy with laser, salt spray corrosion resistance of the DM code mark generated by the method can be increased greatly, and the oxidation film in a marking area is controllable; the influence of the mark for part matrix out of the marking area is poor; the operation is simple; and the efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of laser marking, in particular to a laser marking method for improving the salt spray corrosion resistance of two-dimensional codes on the surface of aluminum alloys, so as to realize the two-dimensional bar codes marked on the surface of aluminum alloys in a long-term salt spray environment It can still be effectively read later. Background technique [0002] Practice has proved that laser direct marking technology and Data Matrix code (hereinafter referred to as DM code) technology can better solve the problem of product quality tracking. Laser marking technology produces permanent, high-contrast, high-quality marks on a variety of surfaces, such as metal, glass, ceramics or wood. Ensuring that a product has an effective unique identifier at any point in its life cycle is the key to realizing product life cycle management and information tracking. [0003] Parts are often subjected to various harsh cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04
Inventor 何卫平李夏霜雷蕾王健徐阳锋徐琅
Owner NORTHWESTERN POLYTECHNICAL UNIV
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