%0 Conference Paper %1 feuer.2021.fluence %A Feuer, Anne %A Weber, Rudolf %A Graf, Thomas %B Proceedings of the Lasers in Manufacturing Conference 2021 %D 2021 %E Feuer, Anne %I German Scientific Laser Society (WLT e.V.) %K drilling laser micromaterialprocessing modeling myown steel ultrashortpulse %T Fluence dependence of the edge quality of microhole exits for percussion drilling with ultrashort laser pulses %X For many applications, edge quality and shape accuracy of microholes are crucial. One assumption is that the fluence at the tip of the microhole during drilling is a key parameter for the quality of the microhole’s exit. It was therefore investigated experimentally how the fluence affects the edge quality. The experiments were performed in 0.5 mm thick steel using a Ti: sapphire laser system operating at a wavelength of 800 nm, a pulse duration of 1 ps, and a repetition rate of 1 kHz. For the quantitative analysis of the edge quality, microscope images were evaluated using a machine learning approach. Two key figures, striations amplitude and perimeter ratio, were defined that proved to be significant in characterizing the edge quality of exits. In the current talk it will be shown that the quality of exits of percussion-drilled microholes could be significantly improved if the fluence dependence is considered.

@inproceedings{feuer.2021.fluence, abstract = {For many applications, edge quality and shape accuracy of microholes are crucial. One assumption is that the fluence at the tip of the microhole during drilling is a key parameter for the quality of the microhole’s exit. It was therefore investigated experimentally how the fluence affects the edge quality. The experiments were performed in 0.5 mm thick steel using a Ti: sapphire laser system operating at a wavelength of 800 nm, a pulse duration of 1 ps, and a repetition rate of 1 kHz. For the quantitative analysis of the edge quality, microscope images were evaluated using a machine learning approach. Two key figures, striations amplitude and perimeter ratio, were defined that proved to be significant in characterizing the edge quality of exits. In the current talk it will be shown that the quality of exits of percussion-drilled microholes could be significantly improved if the fluence dependence is considered.}, added-at = {2021-09-13T11:38:47.000+0200}, author = {Feuer, Anne and Weber, Rudolf and Graf, Thomas}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2d2013e1ae78b414d18487dc317dc4d2c/annefeuer}, booktitle = {Proceedings of the Lasers in Manufacturing Conference 2021}, editor = {Feuer, Anne}, eventdate = {June 21 - 24, 2021}, eventtitle = {Lasers in Manufacturing Conference 2021 (LiM)}, interhash = {cfe881de56302af14cf6566da62f9c03}, intrahash = {d2013e1ae78b414d18487dc317dc4d2c}, keywords = {drilling laser micromaterialprocessing modeling myown steel ultrashortpulse}, language = {English}, publisher = {German Scientific Laser Society (WLT e.V.)}, timestamp = {2021-09-13T10:29:37.000+0200}, title = {Fluence dependence of the edge quality of microhole exits for percussion drilling with ultrashort laser pulses}, year = 2021 }