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A method for laser marking small-size two-dimensional codes on the surface of aluminum alloy

A technology of aluminum alloy surface and laser marking, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of separation of products and unique marks, difficulty in guaranteeing the quality of two-dimensional codes, and difficulty in the implementation of part binding , to achieve the effects of strong practicability, improved reading quality and good repeatability

Active Publication Date: 2021-03-30
陕西因特镁克智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The method of hanging tags on parts and marking QR codes on the tags often requires steel wire ropes to bind the tags to the parts, which is troublesome to operate, and causes the separation of the product and the unique logo. , but it is difficult to implement binding for parts with smaller sizes and no holes, and its applicability is greatly reduced
[0006] 2. The laser marking method of traditional vector filling and "module indentation" greatly reduces the influence of the laser heat-affected area on the growth of small-size two-dimensional code printing through the "module indentation", and avoids the use of The boundary of the two-dimensional code module is severely "over-ablated", but this strategy will often fail when the module size is on the same order of magnitude as the laser beam spot size
[0007] 3. Dot-matrix laser direct marking method, which minimizes the influence of the laser heat-affected area on the growth of small-size two-dimensional code printing, but this method has higher requirements for the surface texture and roughness of the material substrate , otherwise the quality of the marked two-dimensional code is difficult to guarantee (when the roughness Ra≧6.3μm, the marked two-dimensional code will not be able to be read correctly), and the relevant literature ignores the use of this method in the laser processing process The impact of the resulting tiny particle jet on the quality of the QR code

Method used

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  • A method for laser marking small-size two-dimensional codes on the surface of aluminum alloy
  • A method for laser marking small-size two-dimensional codes on the surface of aluminum alloy
  • A method for laser marking small-size two-dimensional codes on the surface of aluminum alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Step 1: Substrate preparation and pretreatment:

[0076] Step 1.1: prepare a 5A06 aluminum alloy base material, a thin plate with a base material thickness of 5 mm;

[0077] Step 1.2: Cleaning and air-drying: Ultrasonic cleaning is performed on the sample in step 1.1 in acetone for 2 minutes to remove possible oil and impurities on the surface of the material, and then air-dried to prepare for later pretreatment and QR code marking;

[0078] Step 1.3: Test the surface roughness of the aluminum alloy to be marked, and the result shows that Ra=1.6, so it is the base material of Group A, so go directly to step 2;

[0079] Step 2: Laser marking two-dimensional code: Use the same laser marking equipment as in step 1. After the focus adjustment is completed, mark a square with a size of 0.8×0.8mm directly on the surface of the thin plate substrate (for group A substrate). 2 The DM code (the code word is "123456"), the marking method is dot matrix marking; the laser marking p...

Embodiment 2

[0088] Step 1: Substrate preparation and pretreatment:

[0089] Step 1.1: prepare a 5A06 aluminum alloy substrate, a thin plate with a substrate thickness of about 3mm;

[0090] Step 1.2: Cleaning and air-drying: Ultrasonic cleaning is performed on the sample in step 1.1 in acetone for 5 minutes to remove possible oil and impurities on the surface of the material, and then air-dried to prepare for later pretreatment and QR code marking;

[0091] Step 1.3: Test the surface roughness of the aluminum alloy to be marked, and the result shows that Ra=6.3, and the texture is obvious, so it is the base material of group B and enters step 1.4;

[0092] Step 1.4: Pretreatment of two-dimensional code marking, prepare a laser action bottom layer by pre-scanning; use fiber laser marking machine, after focusing, mark a size of 3×3mm 2 square module; the laser marking process parameters used are: laser power 3W, marking speed 200mm / s, Q frequency 50KH, module scanning filling line spacing 0...

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Abstract

The invention discloses a small-size two-dimensional code laser marking method for an aluminum alloy surface, changes a traditional direct marking method for vector filling on a surface of a substrate, and adopts a lattice laser marking method. According to the lattice laser marking method, the advantages of minimizing the influence of a laser heat affected zone on the small-size two-dimensional code marking is succeeded, and marking a high-quality two-dimensional code on the surface of a small-sized aluminum alloy part becomes possible. The small-size two-dimensional code laser marking methodfor an aluminum alloy surface is directed at the aluminum alloy material, the process parameters of the lattice laser marking is optimized, the reading quality of the marked small-sized two-dimensional code is further improved, and the reading quality the marked small-sized two-dimensional code formed by the method is greatly improved. The method has the advantages of simple manufacturing process, high operability, good repeatability and practicability, and can also be used as a reference for small-sized two-dimensional code marking on the surface of other materials.

Description

technical field [0001] The invention belongs to the field of industrial marking, and in particular relates to a laser marking method for a small-size two-dimensional code on the surface of an aluminum alloy. Background technique [0002] Data Matrix code (hereinafter referred to as DM code) and direct part marking (DPM, Direct Part Marking) technology has been widely used in the field of marking of aviation, aerospace and light industrial machinery parts and components. However, the unique marking of small parts, especially The direct marking of small-sized aluminum alloy parts is still a technical bottleneck hindering the application of this technology in enterprises. Because aluminum alloy, because of its low density, high strength, high plasticity and excellent electrical conductivity, thermal conductivity and other characteristics, has been widely used in aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry, and has been widely used in skin,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/362B23K26/60
CPCB23K26/362B23K26/60
Inventor 李夏霜李体仁常博张冬旭李晨李海涛朱朝飞
Owner 陕西因特镁克智能科技有限公司
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