研究目的
Investigating the use of laser micro drilling methods for the perforation of aircraft suction surfaces to reduce fuel consumption through hybrid laminar flow control.
研究成果
Both SPMD and PMD laser drilling techniques are suitable for manufacturing HLFC structures with more than 300 holes/s, which are 50 μm in diameter with deviations less than 3 μm. These techniques offer a flexible and wear-free production method for high-quality drillings.
研究不足
The study is limited to titanium sheets and does not explore the application of these techniques on other materials. The precision and speed of drilling are dependent on the equipment used, which may not be universally available.
1：Experimental Design and Method Selection:
The study compares two laser drilling techniques, single pulse micro drilling (SPMD) and percussion micro drilling (PMD), for creating micro-holes in titanium sheets.
2：Sample Selection and Data Sources:
Titanium grade 2 and grade 5 specimens were used.
3：List of Experimental Equipment and Materials:
A high-precision multiple-axis gantry machine, a short pulsed fibre laser (IPG YLP-HP-1), a laser scan head from ScanLab, and a home-made linear motor axis CNC machine were used.
4：Experimental Procedures and Operational Workflow:
The PMD technique involved using a scanner to synchronize laser beam activation and positioning, while the SPMD technique involved adjusting the lens position and nozzle distance for optimal drilling.
5：Data Analysis Methods:
The diameter of the micro-holes was measured, and edge detection and Landau fit algorithms were used for analysis.
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