Laser hole cutting in Kevlar: modeling and quality assessment
Laser hole cutting in Kevlar: modeling and quality assessment
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DOI：
10.1007/s00170-007-1167-9
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
F. Al-Sulaiman;B. Yilbas;F. Karakaş;M. Ahsan;E. Mokheimer
中科院分区：
文献类型：
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作者：
F. Al-Sulaiman;B. Yilbas;F. Karakaş;M. Ahsan;E. Mokheimer
传统的凯夫拉层压板加工方法导致最终产品质量差，加工比能要求过高。然而，激光加工具有精度高、加工速度快等优点。本文对不同厚度和性能的凯夫拉层压板进行了激光孔切割。在孔切割实验中，激光输出功率、频率和切割速度是不同的。根据不同的激光参数和凯夫拉纤维的性能，制定并预测了切割的具体能量需求、切割过程的热效率和切口宽度。将切割质量与切割孔周围的损伤大小相关联，并进行统计分析，考察各参数对损伤大小的影响。结果表明，该方法比能量需求明显低于常规钻井方法。激光辐照功率对损伤尺寸有显著影响。通过激光切割边缘周围的损伤尺寸百分比来判断，孔的质量与传统方法相比有了很大的提高。
Machining of Kevlar laminates with conventional methods results in poor end-product quality and excessive specific energy requirement for machining. However, laser machining has considerable advantages over the conventional methods due to precision and rapid processing. In the present study, laser hole cutting into Kevlar laminates with different thicknesses and properties is carried out. The laser output power, frequency, and cutting speed are varied during the hole-cutting experiments. The specific energy requirements for cutting, thermal efficiency of the cutting process, and kerf width are formulated and predicted for various laser parameters and Kevlar properties. The cut quality is associated with the damage size around the holes cut and statistical analysis is carried out to examine the affecting parameters on the damaged size. It is found that specific energy requirement is significantly lower than that of the conventional drilling method. The damage size is affected significantly by the laser irradiated power. The quality of holes, as judged by the percentage of damage size around the cut edges cut by a laser beam, is considerably improved compared to the conventional methods.