Numerical Simulation and Experimental Study of Millisecond Percussion Drilling in Titanium Alloy
Liang Wang, Long Xu, Changjian Wu, Yefei Rong, Kaibo Xia
TL;DR
This paper studies how to efficiently drill tiny holes in titanium alloy turbine blades using laser techniques, focusing on optimizing parameters like pulse energy and width.
Contribution
The study introduces a combined simulation and experimental approach to optimize laser drilling parameters for micro-hole formation in titanium alloy.
Findings
Pulse energy and pulse count mainly affect entrance and exit diameters of micro-holes.
Taper increases with wider pulse widths and higher pulse counts.
Roundness of holes is significantly influenced by pulse width and pulse count.
Abstract
This study addresses the challenge of drilling film-cooling holes in the turbine blades of aircraft engines. Titanium alloy TC4 was selected as the experimental material. The laser-drilling process was simulated with ANSYS to determine optimal parameters, which were subsequently applied in machining trials. An impact-drilling method was then used to evaluate how pulse width, pulse energy, and pulse count affect micro-hole entrance and exit diameters, taper, and roundness. Simulations revealed that pulse energy and pulse count predominantly govern entrance and exit diameters, whereas pulse count and pulse width exert a stronger influence on taper. Experiments confirmed that entrance and exit diameters increased as pulse energy rose from 2.0 J to 2.8 J; taper increased as pulse width widened from 0.6 ms to 1.4 ms; and entrance diameter, exit diameter, and taper all grew as pulse count…
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Taxonomy
TopicsLaser Material Processing Techniques · Advanced Machining and Optimization Techniques · Advanced machining processes and optimization