研究目的
To generate micro wave patterns using vibrating-lens assisted laser machining and extend its capabilities beyond traditional laser machining.
研究成果
The vibrating-lens assisted laser machining method successfully generated micro wave patterns, with the pattern's amplitude and frequency controllable by adjusting laser power, feeding velocity, defocusing distance, vibration amplitude, and frequency. The mathematical model accurately predicted the pattern shapes, validated by experimental results. Future work could explore the effects of these patterns on friction and wettability.
研究不足
The study is limited by the resolution and bandwidth of the motor/servo used to implement lens or workpiece motions. The process may also be constrained by the size of the machining area and the complexity of generating more complex patterns.
1：Experimental Design and Method Selection:
The study used a vibrating-lens assisted laser machining system to generate micro wave patterns. A mathematical model based on the traditional heat-flow principle was developed to predict the energy distribution and pattern shape.
2：Sample Selection and Data Sources:
Stainless steel 304 workpieces with a surface roughness of 0.23 μm were used. Key property parameters of stainless steel were referenced from previous studies.
3：23 μm were used. Key property parameters of stainless steel were referenced from previous studies. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The setup included a picosecond laser source, a vibrating-lens assembly, a 4-axis platform, and a CCD camera for monitoring. The lens was driven by a PZT actuator controlled by a high-voltage power amplifier.
4：Experimental Procedures and Operational Workflow:
Sinusoidal signals were used to drive the PZT. The laser beam was focused on the workpiece surface, and the lens vibrated along the irradiation direction. The workpiece was moved along the X- and Y-axes by the platform.
5：Data Analysis Methods:
The depth of the sinusoidal wave pattern was analyzed using Matlab based on the developed model. Experimental results were compared with simulations to verify the model.
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picosecond laser
LUMERA RAPID 532 LASER
COHERENT
Generates the laser beam for machining
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4-axis platform
AGR-100
AEROTECH
Moves the workpiece along the X- and Y-axes
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hollow piezo ceramic actuator
P-016.20
PI
Generates vibrations for the lens
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lens
ACA254-030-532
THORLABS
Focuses the laser beam on the workpiece surface
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high-voltage power amplifier
PZT350A
TREK
Controls the vibrations of the piezo actuator
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capacitance sensor
Microsense Ⅱ Model 5300
Microsense/ ADE Technologies
Measures the amplitude of the lens
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