Proceedings of the
9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2022)
15 – 18 November 2022, Singapore

Machining Property by Ultra Fine Bubble Coolant

Satoshi Anzai1, Manabu Iwai2,a and Shinichi Ninomiya3

1Anzaikantetsu CO,LTD., 3-1-16, Komaoka Tsurumi, Yokohama, Kanagawa, 230-0071, Japan

2Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan

34-1 Gakuendai Miyashiro, Saitama, 345-8501. Japan


Our research group has been studying the application of micro bubbles (MB: several µm~50µm in diameter) generated in the working fluid for removal machining. Currently, the research has developed into the application of UFB coolant generated ultra fine bubbles (UFB) with the diameter of less than 1µm. It is known that UFB coolant improves tool wear in turning and grinding machining, but the mechanism is still unknown. In this study, we applied a UFB generator using a micro-porous-ceramics that the UFB conditions can be changed. And the relationship between changes in the physical property of the working fluid mixed UFB and machining characteristic was investigated. As a result, it was found that the viscosity of coolant was reduced when UFB was mixed into coolant. Furthermore, when the UFB coolant was applied to turning of stainless steel, the tool wear and the surface roughness were improved.

Keywords: Ultra fine bubble, Coolant, Turning, Tool wear, Surface roughness

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