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A Method for Preparing Marks Based on Femtosecond Laser Ablation Composite Induction

A femtosecond laser, femtosecond laser technology, used in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problem that the processed parts are prone to cracks and recast layers, affect the reliability and recognition rate of marking, and are not suitable for turbines. Parts processing and other problems, to achieve the effect of improving processing efficiency and recognition rate, good consistency, and reducing reflectivity

Active Publication Date: 2020-01-21
无锡超通智能制造技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing principle of continuous laser, long pulse laser and short pulse laser is that the material is removed through phase change, so the processed parts are prone to cracks and recast layers, so they are not suitable for the processing of turbine parts in the aerospace field.
[0003] The primary measure of the quality of the marking is that it can be recognized, but as time goes by, the marking part may be oxidized and corroded, which will affect the reliability and recognition rate of the marking

Method used

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  • A Method for Preparing Marks Based on Femtosecond Laser Ablation Composite Induction
  • A Method for Preparing Marks Based on Femtosecond Laser Ablation Composite Induction
  • A Method for Preparing Marks Based on Femtosecond Laser Ablation Composite Induction

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1, a method for preparing marks based on femtosecond laser ablation composite induction, comprising the following steps:

[0023] 1) Use an area of ​​2×2cm 2 , a TC4 metal sheet with a thickness of 2mm (the composition of the titanium alloy TC4 material is Ti-6Al-4V, containing the remainder of titanium (Ti), iron (Fe) ≤ 0.30, carbon (C) ≤ 0.10, nitrogen (N) ≤ 0.05 , hydrogen (H) ≤ 0.015, oxygen (O) ≤ 0.20, aluminum (Al) 5.5 ~ 6.8, vanadium (V) 3.5 ~ 4.5) as the processing object;

[0024] 2) Build an optical path, such as figure 1 As shown, the output light of the femtosecond laser 1 is focused on the scissor lift table 3 through the two-axis scanning galvanometer system 2, and the femtosecond laser 1, the two-axis scanning galvanometer system 2 are connected to the computer;

[0025] 3) Using a computer to adjust the output laser of the femtosecond laser 1, the laser wavelength is 1030nm, the pulse width is 240fs, the repetition frequency is 50kHz, and th...

Embodiment 2

[0029] In Example 2, the laser ablation parameters in Example 1 were set to scan speed 80 mm / s and groove spacing 10 μm, and the laser induction parameters were laser power 650 mW, scanning speed 30 mm / s and groove spacing 10 μm.

[0030] The beneficial effects of this embodiment are: image 3 , the melting of the marking unit obtained in this example is significantly reduced, the roughness is small, and the edge quality and consistency are better; the size of the marking unit is set to 500 μm, and the marking can be adjusted according to the amount of information carried and actual needs. Size, and this marking unit can be completed within 1.15s, with high efficiency; marking can be recognized by barcode equipment. refer to Figure 4 , Figure 4 for image 3 The zoom-in results of the marking unit show that micro-nano-scale structures are induced on its surface, thereby reducing the reflectivity of the marking pattern and effectively improving the recognition rate of the m...

Embodiment 3

[0031] Embodiment 3, the material among the embodiment 1 is selected as nickel base alloy GH4169 sheet metal (nickel base alloy GH4169 material is composed of nickel (Ni)≤56.02, iron (Fe)≤20.55, chromium (Cr)≤20.22, niobium ( Nb)≤3.21) as the processing object, the laser ablation parameters were set to scan speed 70mm / s and groove spacing 10μm, and the laser induction parameters were laser power 650mW, scanning speed 40mm / s and groove spacing 5μm.

[0032] The beneficial effects of this embodiment are: Figure 5 In this example, the marking unit was prepared by laser ablation compound induction on nickel-based alloy GH4169, and the overall quality was as good as that of titanium alloy TC4: the melting of the marking unit was significantly reduced, the roughness was small, and the edge quality was consistent Good performance; the size of the marking unit is set to 500μm, and the size of the marking can be adjusted according to the amount of information carried and the actual ne...

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Abstract

The invention discloses a method for preparing a mark stamp based on femtosecond laser ablation composite induction. A titanium alloy TC4 or nickel-based alloy GH4169 metal sheet is adopted as a machining object, a light path is established, a femtosecond laser device outputs light to be focused to a shear type lifting table through a two-axis scanning galvanometer system, and the femtosecond laser device and the two-axis scanning galvanometer system are connected with a computer; the computer is utilized for adjusting the femtosecond laser device to output lasers, the wavelength of the lasersis 1,030 nm, the pulse width is 240 fs, the repetition frequency is 1-200 kHz and can be adjusted, and the maximum single pulse energy is 200 mu J; and the titanium alloy TC4 or nickel-based alloy GH4169 metal sheet is fixed to a machining station of the shear type lifting table, and through adjustment of the repetition frequency, the single pulse energy, the scanning speed and the groove distance, optimal laser ablation primary mark stamp basic parameters and laser induction second-time mark stamp basic parameters are obtained. By means of the method, the quality, efficiency and recognitionrate of the femtosecond laser mark stamp are improved, and adaptability is achieved for a titanium alloy and a nickel-based alloy.

Description

technical field [0001] The invention belongs to the technical field of laser marking, in particular to a method for preparing marking based on femtosecond laser ablation compound induction. Background technique [0002] With the rapid development of information technology, the traceability of product information is becoming more and more important. As a key application technology of the Internet of Things and e-commerce, the use of marking patterns has greatly improved the speed and work efficiency of information processing. In order to ensure that the product has a well-readable and unbreakable mark, the choice of the marking method is also particularly important. Compared with the markings on ordinary commodity packaging, the markings on metal parts or components have higher requirements. Laser processing has been widely used in various fields due to its non-contact and flexibility. Compared with traditional marking methods such as mechanical dotting and electrolysis, la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/362
Inventor 王文君孙小云梅雪松赵文振潘爱飞崔健磊
Owner 无锡超通智能制造技术研究院有限公司
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