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The energy density threshold evaluation for high-precision laser cleaning of the oxidized layer on 7075 aluminum alloy with 100 ns laser

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Abstract

The machining parameters are difficult to duplicate and apply among various equipment in 7075 aluminum laser cleaning. This is due to the non-uniform Gaussian beam being used as the laser source, and the previous mean energy density hardly meets the high-precision evaluation. Therefore, an accurate calculation method of energy density corresponding to the beam intensity distribution is proposed. The key step is to get the intensity distribution of the focal spot. Here, an indirect method for calculating is applied to solve the problem that the focal spot energy is ultra-strong to be directly measured and analyzed. Then, a universal energy density threshold for the oxidized layer laser stripping on 7075 aluminum alloy is studied by analyzing the surface morphology of 7075 aluminum alloy cleaned by 100 ns pulse laser with different laser powers and scanning velocities. This research will provide basic data for high-precision laser cleaning equipment.

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Funding

This work was supported by the Key Technology Research and Development Program of Shandong (Grant No. 2019GGX104106, No. 2019JZZY010402), the China Postdoctoral Science Foundation (Grant No.2018M632639), the Higher Education Discipline Innovation Project-the 111 plan (Grant No. D21017), and the National Natural Science Foundation of China (Grant No. 51775289).

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Authors and Affiliations

  1. Key lab of industrial Fluid Energy Conservation and Pollution Control, Qingdao University of Technology, Qingdao, 266520, Shandong, China

    Jing Shao, Ruolan Zhang, Hao Dong & Shufeng Sun

  2. Shandong Energy Heavy Equipment Manufacturing Group Co. Ltd., Shandong, 271200, Taian, China

    Ruolan Zhang & Chengming Cao

  3. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Chengming Cao

Authors
  1. Jing Shao
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  2. Ruolan Zhang
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  3. Hao Dong
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  4. Chengming Cao
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  5. Shufeng Sun
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Contributions

Jing Shao contributed to the conception of the study and writing. Ruolan Zhang contributed to the experiment and manuscript preparation. Hao Dong contributed to the data analysis and revisions. Chengming Cao contributed to reviewing and editing the paper. Shufeng Sun contributed to the supervision of the research.

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Correspondence to Jing Shao.

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Shao, J., Zhang, R., Dong, H. et al. The energy density threshold evaluation for high-precision laser cleaning of the oxidized layer on 7075 aluminum alloy with 100 ns laser. Int J Adv Manuf Technol 120, 1901–1907 (2022). https://doi.org/10.1007/s00170-022-08914-w

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  • DOI: https://doi.org/10.1007/s00170-022-08914-w

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