Experimental Study on Millisecond Laser Percussion Drilling of Heat-Resistant Steel
Liang Wang, Changjian Wu, Yefei Rong, Long Xu, Kaibo Xia
TL;DR
This study explores how millisecond lasers can efficiently drill micro-holes in heat-resistant steel by adjusting laser parameters.
Contribution
The study identifies optimal laser parameters to minimize taper and control blind hole formation in heat-resistant steel.
Findings
At 2.2 J pulse energy, the taper is minimal (2.2°), but increases to 2.4° at 2.4 J.
Exit diameter stabilizes and taper decreases to 1.8° at 55–60 pulse counts.
Blind holes form when pulse width exceeds 1.2 ms, with maximum entrance diameter at 1.2 ms, 2.4 J, and 50 pulses.
Abstract
Millisecond lasers, with their high processing efficiency and large power, are widely used in manufacturing fields such as aerospace. This study aims to investigate the effects of different processing parameters on the micro-hole processing of 316 heat-resistant steel using millisecond lasers. Through the control variable method, the study examines the impact of pulse energy, pulse count, and pulse width on the quality of micro-holes, including the entrance diameter, exit diameter, and taper. Furthermore, combined with orthogonal experiments and COMSOL Multiphysics 6.2 simulations, the study explores the influence of pulse width on the formation of blind holes. The experimental results show that when the pulse energy is 2.2 J, the taper is minimal (2.2°), while the taper reaches its peak (2.4°) at 2.4 J pulse energy. As the pulse count increases to 55–60 pulses, the exit diameter…
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Taxonomy
TopicsAdvanced Machining and Optimization Techniques · Advanced machining processes and optimization · Advanced Surface Polishing Techniques