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为提高缝阵天线薄板的激光切割质量,介绍了一种基于气熔比控制的激光精密切割方法。在Nd∶YAG脉冲激光切割系统上,试验研究了气熔比对激光切割0.5 mm厚6063铝合金薄板质量的影响,即气熔比对切口宽度、切口表面质量、重铸层和挂渣的影响。对气熔比分别为2.62,3.06和4.11的3组试件进行检测与观察,发现提高气熔比,可减小重铸层、增大切口表面光滑区、改善激光切割质量。试验获得切口顶部宽度为0.2 mm,底部无挂渣,重铸层厚度为2.03μm,切口表面光滑区比例占切口的40%。结果表明,研究气熔比可深化对激光加工机理的认识,有效地提高铝合金薄板激光切割质量。
In order to improve the laser cutting quality of the suture antenna sheet, a laser precision cutting method based on the air-fuel ratio control is introduced. In the Nd: YAG pulsed laser cutting system, the effect of the air-fuel ratio on the quality of the laser-cut 6063 aluminum alloy sheet was experimentally studied, ie, the influence of the air-fuel ratio on the width of the notch, the surface quality of the notch, the recast layer and the dross . The gas-liquid ratio of 2.62,3.06 and 4.11 of the three groups were tested and observed specimens and found that to improve the gas-to-fuel ratio, can reduce the recast layer, increase the smooth surface of the incision surface, improve laser cutting quality. The width of the top of the incision was 0.2 mm, the bottom of the incision was not dross, the thickness of the recast layer was 2.03 μm, and the proportion of the smooth area of the incision surface accounted for 40% of the incision. The results show that the study of air-fuel ratio can deepen the understanding of laser processing mechanism, effectively improve the quality of laser cutting aluminum alloy sheet.