| 高峰值功率自准直脉冲Nd:YAG激光加工无锥度直孔研究 |
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| 引用本文： | 姜梦华,李强,雷訇,王金国,惠勇凌. 高峰值功率自准直脉冲Nd:YAG激光加工无锥度直孔研究[J]. 中国激光, 2011, 0(10) |
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| 作者姓名： | 姜梦华 李强 雷訇 王金国 惠勇凌 |
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| 作者单位： | 北京工业大学激光工程研究院; |
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| 基金项目： | 国家自然科学基金(61040065); 北京市自然科学基金(4112005)资助课题 |
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| 摘 要： | 利用改进的脉冲Nd:YAG激光器,对激光冲击打孔加工无锥度直孔进行了实验研究。在优化激光脉冲峰值功率和脉冲能量、辅助气压参数的基础上,通过比较实验证明,能量递增组合脉冲是实现无锥度直孔加工的有效方式,增加脉冲组合中脉冲的个数可加工出负锥度的孔;激光焦点位置是影响孔锥度的重要因素,焦点位于材料表面上方1.1~1.7 mm有利于减小锥度。在厚度为1.5,3.0 mm的镍基高温合金材料上,获得孔径分别为480,510μm的直孔,重复打孔孔径误差约30μm,孔锥度<1%。给出了可实用于激光冲击打孔的直孔加工方法和脉冲激光器,并可用于其他材料的加工。
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| 关 键 词： | 激光技术 激光冲击打孔 孔锥度 脉冲Nd:YAG激光器 热效应 |
Study on Producing Non-Tapered Holes with Adaptively Collimating High Peak Power Pulsed Nd:YAG Laser |
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| Jiang Menghua Li Qiang Lei Hong Wang Jinguo Hui Yongling. Study on Producing Non-Tapered Holes with Adaptively Collimating High Peak Power Pulsed Nd:YAG Laser[J]. Chinese Journal of Lasers, 2011, 0(10) |
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| Authors: | Jiang Menghua Li Qiang Lei Hong Wang Jinguo Hui Yongling |
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| Affiliation: | Jiang Menghua Li Qiang Lei Hong Wang Jinguo Hui Yongling (Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | Experiments of laser percussion drilling are carried out on nickel-based superalloy using a modified pulsed Nd:YAG laser.Peak power,pulse energy and assist gas pressure are optimized experimentally.Experimental results demonstrate that a pulse combination with increasing pulse energy is an effective method to produce non-tapered holes.Even negative taper holes can be produced through increasing the number of pulses in the pulse combination.Focal position is an important factor that affects the taper of hole... |
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| Keywords: | laser technique laser percussion drilling hole taper pulsed Nd:YAG laser thermal lens effect |
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