CO_(2)激光烧蚀PMMA材料工艺优化

Optimization of CO_(2) Laser Ablation of PMMA Materials

聚甲基丙烯酸甲酯(PMMA,又称亚克力)材料广泛用于生产生活的各个场景,但其一体化加工成型是限制其发展的主要因素。提出CO_(2)连续激光烧蚀PMMA材料,以提高加工后材料形状精度和一体化加工效果。通过构建不同激光功率、激光束离焦量和激光移动速度的组合方式,开展了不同激光工艺参数下CO_(2)连续激光烧蚀PMMA材料工艺实验,研究表明将离焦量调整为0 mm可使其切缝最小,保证激光能量利用率,提高PMMA材料形状精度。当激光功率密度为203.89 W/mm^(2),激光束移动速度为100 mm/s时,PMMA材料表面粗糙度平均值最小,约为3.47μm,且粗糙度数据稳定性最好,约为67.72%,在此激光工艺参数组合模式下烧蚀PMMA材料能获得最理想的激光加工效果。以上研究为CO_(2)连续激光加工PMMA材料工艺研究提供了优化指导,对激光加工非金属材料和高分子材料工艺优化研究具有一定通用性和参考价值。

Polymethyl methacrylate(PMMA)material was widely used in various scenes of production and life,but its integrated processing and molding was the main factor limiting its development.The CO_(2)continuous laser ablation of PMMA material was proposed to improve the shape accuracy of the processed material and the integrated processing effect.By constructing combinations of different laser power,laser beam defocus amount and laser moving speed,the CO_(2)continuous laser ablation process experiment of PMMA material under different laser process parameters was carried out.The research shows that adjusting the defocus amount to 0 mm could minimize the cutting seam,ensure the utilization rate of laser energy,and improve the shape accuracy of PMMA material.When the laser power density is 203.89 W/mm^(2)and the laser beam moving speed is 100 mm/s,the average surface roughness of PMMA material is the smallest,about 3.47μm,and the roughness data stability is the best,about 67.72%.The most ideal laser processing effect can be obtained by ablating the PMMA material in this combination mode of laser process parameters.The above research provides process optimization guidance for the process research of CO_(2)continuous laser processing of PMMA materials,and has certain generality and reference value for the process optimization research of laser processing non-metallic materials and polymer materials.