飞秒激光成丝制备毫米级深孔

发布时间：2018-01-28 11:40

本文关键词： 激光技术飞秒激光成丝效应深孔锥度孔径深宽比　出处：《中国激光》2017年04期 　论文类型：期刊论文

【摘要】：利用飞秒激光成丝效应对2mm厚的聚甲基丙烯酸甲酯材料在空气环境下进行打孔实验,总结光丝长度随飞秒激光平均功率的变化,利用扫描电子显微镜初步分析深微孔的表面形貌并测量孔径的大小,然后分析孔径、深宽比以及锥度随激光平均功率和加工时间的变化规律。研究结果表明,随着飞秒激光平均功率的增大,孔径大小和锥度均有着明显的增大趋势,且深宽比下降。随着加工时间的增加,孔径变大,深宽比下降,锥度先增大后减小再增大,但总体上呈现增大趋势。
[Abstract]:In this paper, the effect of femtosecond laser filamentation was used to drill 2 mm thick polymethyl methacrylate (PMMA) in air, and the variation of fiber length with the average power of femtosecond laser was summarized. The surface morphology of deep micropores was analyzed by scanning electron microscope (SEM) and the pore size was measured. Then the variation of aperture depth to width ratio and taper with the average laser power and processing time was analyzed. With the increase of average femtosecond laser power, the aperture size and taper increase obviously, and the ratio of depth to width decreases. With the increase of processing time, the aperture becomes larger and the ratio of depth to width decreases. Taper increased first and then decreased and then increased, but showed an increasing trend on the whole.
【作者单位】：北京工业大学激光工程研究院强场与超快光子学实验室;中国空间技术研究院北京空间机电研究所;
【基金】：国家自然科学基金(51275012) 中国空间技术研究院创新基金项目
【分类号】：TN249
【正文快照】： 1引言随着航空航天、汽车、工程器件、生物医疗等近代工业以及科学技术的迅速发展,强度大、硬度高、柔韧性强的复合材料得到了越来越广泛的应用[1],而在这些材料上加工出高质量的深微孔是目前亟待解决的问题。传统的打孔工艺远远满足不了许多高精尖产品的关键零件对深微孔加

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