| 研究実績の概要 |
Fluid jet polishing is widely used in super-fine finishing of small and complex optical and prosthetic surfaces. Its advantages include highly controllable polishing footprints and absence of tool wear. But the main drawback is very low material removal rate.
To address this issue, a novel process was proposed in which ultrasonic cavitation generates micro-bubbles directly upstream of the nozzle outlet.
In this research project, we first created a numerical simulation of the acoustic and fluid dynamics in the proposed process, to confirm feasibility and optimise design parameters.
We then implemented a prototype system using a 26-130 kHz ultrasonic transducer. Experimental results show that micro-bubbles boost removal rate by up-to 380%, without causing any degradation of surface finish.
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