Millisecond fibre laser trepanning drilling of angular holes
Millisecond fibre laser trepanning drilling of angular holes
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DOI：
10.1007/s00170-019-03389-8
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发表时间：
2019-06-01
影响因子：
3.4
通讯作者：
Hayward, P.
中科院分区：
文献类型：
--
作者：
Marimuthu, S.;Antar, M.;Hayward, P.
本文旨在研究毫秒（ms）脉冲光纤激光器在2 mm厚的航空航天镍高温合金（最终孔长为4 mm）中钻削直径为0.8 mm的角孔（与表面成30度）的基本特性。通过实验研究了气体压力、工件间距、激光束聚焦位置、套料速度、套料轨道数、脉冲能量、脉冲宽度和脉冲频率等工艺参数对孔质量的影响。结果表明，高质量和高生产率可以实现与毫秒光纤激光钻孔，特别是当与传统的Nd：YAG激光钻孔。提出了一种新的套料打孔方法，以实现高质量的激光打孔。
This paper aims to investigate the basic characteristics of millisecond (ms) pulsed fibre laser drilling of 0.8 mm diameter angular holes (30 degrees to the surface) in a 2 mm thick aerospace nickel superalloy (resultant hole length of 4mm). Experiments have been conducted to understand the influence of various process parameters on the hole quality, including gas pressure, nozzle-workpiece distance, laser beam focus position, trepanning speed, number of trepanning orbits, pulse energy, pulse duration and pulse frequency. The results suggest that high quality and high productivity can be achieved with millisecond fibre laser drilling, especially when compared to traditional Nd:YAG laser drilling. A new trepanning drilling method for achieving high-quality laser drilling was proposed and evaluated.