期刊
ADVANCED OPTICAL TECHNOLOGIES
卷 7, 期 3, 页码 183-188出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/aot-2018-0006
关键词
ablation threshold; helical drilling; laser materials processing; simulation; ultrafast lasers
类别
A model for predicting the borehole geometry for laser drilling is presented based on the calculation of a surface of constant absorbed fluence. It is applicable to helical drilling of through-holes with ultrashort laser pulses. The threshold fluence describing the borehole surface is fitted for best agreement with experimental data in the form of cross-sections of through-holes of different shapes and sizes in stainless steel samples. The fitted value is similar to ablation threshold fluence values reported for laser ablation models.
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