Monitoring and analysis of millisecond laser drilling process and performance with and without longitudinal magnetic assistance and/or assist gas

H Wang, Y Xu, H Zheng, W Zhou, N Ren, X Ren… - Journal of Manufacturing …, 2019 - Elsevier
A systematic investigation was reported for observing and analyzing the process and
performance of millisecond laser drilling with and without magnetic assistance and/or assist …

Magnetic field effects on laser drilling

C Ye, GJ Cheng, S Tao, B Wu - Journal of …, 2013 - asmedigitalcollection.asme.org
A magnetic field-assisted laser drilling process has been studied, where nanosecond laser
ablation is performed under an external magnetic field. The study shows that the magnetic …

Magnetic-field-assisted laser percussion drilling

CC Ho, GR Tseng, YJ Chang, JC Hsu… - The International Journal of …, 2014 - Springer
This study explored the feasibility of magnetic-field-assisted laser percussion drilling on
highly reflective materials, ie, Al5052. During laser percussion drilling, the Lorentz force …

Experimental characterization and real-time monitoring for laser percussion drilling in titanium alloy using transverse electric field assistance and/or lateral air blowing

H Wang, J Liu, Y Xu, X Wang, N Ren, X Ren… - Journal of Manufacturing …, 2021 - Elsevier
A novel laser percussion drilling technology assisted by an electric field with lateral air
blowing is reported. The lateral air blowing is first proposed for assisting the E-field assisted …

Effects of applying electric and magnetic fields on laser drilling

Y Lu, GF Sun, DP Wen, YK Zhang, AX Feng - The International Journal of …, 2016 - Springer
To reduce defects and improve the quality of laser drilling, the electric and magnetic (EM)
field-assisted laser drilling has been tested. For different industrial applications, we …

Ablation mechanism in underwater drilling by an ultrafast laser with pulse energy below the water breakdown threshold

C Zheng, H Shen - Journal of Manufacturing Processes, 2022 - Elsevier
A water-assisted method is used to reduce heat accumulation during the ultrafast laser
drilling of metals. To understand the complex material ablation mechanism, an underwater …

Temporally modulated laser power dynamic drilling strategy with comprehensive optimization of quality and efficiency

Z Zhang, Y Liu, J Xu, B Miao, Z Zhao, Z Yang… - Journal of Manufacturing …, 2023 - Elsevier
Motivated by the need to comprehensively optimize the quality and efficiency of laser
drilling, a dynamic drilling strategy wherein laser power is temporally modulated is …

Reducing plasma shielding effect for improved nanosecond laser drilling of copper with applied direct current

J Li, W Zhang, H Zheng, J Gao, C Jiang - Optics & Laser Technology, 2023 - Elsevier
Laser drilling of copper faces challenges due to its high reflectivity and high thermal
conductivity of the laser beam. To enhance laser drilling efficiency and hole surface quality …

Characteristics of the effect of swirling gas jet assisted laser percussion drilling based on machine vision

CC Ho, YM Chen, JC Hsu, YJ Chang… - Journal of Laser …, 2015 - pubs.aip.org
In this paper, a machine vision-based system is used for in-situ monitoring and
characterization of the effect of swirling gas jet assisted laser percussion drilling. Feasibility …

Percussion drilling with laser: hole completion criterion

ND Pandey, HS Shan, A Bharti - The International Journal of Advanced …, 2006 - Springer
The criterion for ensuring formation of a through hole is an important aspect of laser drilling.
Close observation of the process has indicated that drilling of the substrate is achieved in six …