基于COMSOL的激光清洗2219铝合金漆层工艺研究
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国家自然科学基金项目(No.51775166)资助。


Study on laser cleaning technology of 2219 aluminum alloy paint layer based on COMSOL
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    摘要:

    利用COMSOL Multiphysics仿真软件,建立2219铝合金板表面环氧聚酰胺底漆有限元模型,并在其表面加载经典高斯脉冲热源模拟激光清洗过程。探究了清洗参数的变化对漆层温度场、不同漆层厚度清洗效果及烧蚀深度的影响,通过对仿真结果分析发现,当重复频率为25kHz,功率20W时,在不损伤铝合金基体的前提下,搭接率50和60均能够完全清除环氧聚酰胺底漆。使用型号CETC26thPEL脉冲光纤激光器对实物进行清洗,并利用超景深显微镜观察材料表面微观形貌,发现当能量密度为2294J/cm2时,清洗过程中会损伤铝合金基体,搭接率为70会使得材料表面的粗糙度增大影响涂装性能,研究结果为激光清洗高强度铝合金漆层提供一定的理论与实验基础。

    Abstract:

    The finite element model of epoxy polyamide primer on 2219 aluminum alloy plate is established by using COMSOL Multiphysics simulation software,and the laser cleaning process is simulated by loading classical Gaussian pulse heat source on the surface.The influence of the change of cleaning parameters on the temperature field,the cleaning effect of different coating thickness and the ablation depth is explored.Through the analysis of the simulation results,it was found that when the repetition frequency was 25 kHz and the power was 20 W,the epoxy polyamide primer could be completely removed with the lap rate of 50% and 60% under the premise of not damaging the aluminum matrix.The CETC26thPELpulse fiber laser was used to clean the material,and the ultra depth of field 3D microscope was used to observe the microstructure of the material surface.It was found that when the energy density was 22.94 J/cm2,the aluminum alloy matrix would be damaged during the cleaning process,and the lap rate was 70%,which would increase the roughness of the material surface and affect the coating performance.The results provide a theoretical and experimental basis for laser cleaning of high strength aluminum alloy coatings.

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胡少武,王涛,黄旭东,姚涛,苗润芃,康清川,张译之.基于COMSOL的激光清洗2219铝合金漆层工艺研究[J].激光与红外,2022,52(7):970~979
HU Shao-wu, WANG Tao, HUANG Xu-dong, YAO Tao, MIAO Run-peng, KANG Qing-chuan, ZHANG Yi-zhi. Study on laser cleaning technology of 2219 aluminum alloy paint layer based on COMSOL[J]. LASER & INFRARED,2022,52(7):970~979

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  • 在线发布日期: 2022-07-12