靶材背面辅助材料影响激光打孔重铸层分布的实验研究

发布时间：2018-06-13 04:50

本文选题：激光打孔 + 微小孔　；参考：《西安交通大学学报》2017年08期

【摘要】：针对激光直冲加工微小孔时,孔出口重铸层较厚、毛刺较多的问题,提出了在靶材背面增加辅助材料的方法,探究不同吸光能力的材料对激光打孔重铸层分布的影响。辅助材料按照吸光能力分为透射光材料、吸收光材料和散射光材料,选择的3种典型代表材料为石英玻璃、石蜡和NaCl,分别对3种材料激光打孔孔口形貌和重铸层厚度的影响进行实验研究,并对其作用机理进行了深入分析。实验结果显示:背面增加辅助材料可以有效地减小出口的重铸层厚度和出口毛刺,但入口重铸层厚度有不同程度的增加,且脉宽对打孔结果有明显影响;相比之下,NaCl的作用效果最佳,其入口重铸层增量较小,出口干净圆整,重铸层厚度减小了60%以上,减至10~15μm。
[Abstract]:In order to solve the problem of thicker recast layer and more burr at the exit of the hole during laser direct-punching, the method of adding auxiliary material on the back of the target is put forward, and the influence of the materials with different absorbency on the distribution of the recast layer in laser drilling is studied. The auxiliary materials are divided into transmission material, absorption material and scattering material according to their absorbency. The three typical representative materials are quartz glass. The effects of laser drilling hole morphology and thickness of the recast layer on the effect of paraffin wax and NaCl1 were studied respectively and the mechanism of their action was analyzed. The experimental results show that the thickness of the recast layer and the burr of the outlet can be effectively reduced by adding the auxiliary material on the back side, but the thickness of the inlet recast layer increases in varying degrees, and the pulse width has a significant effect on the perforation results. In contrast, the effect of NaCl is the best, the increment of the recast layer at the inlet is small, the outlet is clean and round, and the thickness of the recast layer is reduced by more than 60% to 10 ~ 15 渭 m.
【作者单位】：西安交通大学陕西省智能机器人重点实验室;西安交通大学机械制造系统工程国家重点实验室;西安交通大学机械工程学院;
【基金】：国家自然科学基金资助项目(51375374,51575432) 教育部长江学者和创新团队发展计划资助项目(IRT_15R54)
【分类号】：TG665

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