An Experimental Investigation of the Effects of Femtosecond Laser Helical Drilling: Influence of Process Parameters

2017 International Conference on Material Engineering and Manufacturing

You, Yancheng^1 ; Dong, Yiwei^1,2 ; Li, Xiaoji^1 ; Zhao, Qi^1 ; Wang, Ertai^1 ; Yin, Chunping^1

School of Aerospace Engineering, Xiamen University, Xiamen

361005, China^1

Shenzhen Research Institute, Xiamen University, Shenzhen

518057, China^2

关键词: Ablation thresholds;    Circular scanning;    Drilling process;    Experimental investigations;    Influence of process parameters;    Laser processing parameters;    Microhole drilling;    Processing parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/265/1/012014/pdf
DOI  :  10.1088/1757-899X/265/1/012014

来源: IOP

【 摘 要 】

Femtosecond laser pulses used in micro-drilling, which allows precise and thermal-damage-free removal of material, has progressed remarkably in recent years to become an essential tool for microhole drilling. Helical drilling is the most common method for processing high-precision microholes. Compared to multi-pulse drilling or circular scanning drilling, it is more convenient to process the requested radius and needed depth hole. The mechanism of interaction between the ultra-fast laser and materials is very complex. Exploring the influence of processing parameters on the drilling process not only helps to guide the actual processing, but also helps our understanding of the mechanism. In this study, laser processing parameters for drilling microholes in three materials are investigated. The influence of processing parameters on hole drilling is analysed, and the relationship between the overlapping rate influence on drilling depth and ablation threshold is explored.