超音波キャビテーションの加工および表面処理への応用

概要

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Cavitation that cause erosion of the metal surface is regarded as harmful. But in this study, the phenomenon of erosion on metal surfaces by cavitation is used positively for metal working, surface treatment and for the reappearance of "coined and shaved off" characters. In the experiments, cavitation was generated in water by ultrasonic vibration of 20 kHz. The main results of the studies are as follows ; (1) "Coined and shaved off" characters on metal surfaces are restored by ultrasonic cavitation. (2) The fatigue limits of mild steels increase by exposing the surface to an ultrasonic cavitation flow. (3) Erosion working by radiation of ultrasonic cavitation is useful for cutting work. The relations among the shapes of the terminal rod of the vibrating system, the working conditions of the process and erosion patterns are made clear. (4) The vibration mode of the terminal rod specially designed for generating cavitation is analyzed by the finite element method.
一般社団法人日本機械学会の論文
1987-01-25