Study on cooling method of tool cutting edge using coolant containing fine bubbles

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04717
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: Tokyo Metropolitan Industrial Technology Research Institute
• Principal Investigator: Yasuhiro KUNIEDA 地方独立行政法人東京都立産業技術研究センター, 研究開発本部機能化学材料技術部プロセス技術グループ, 研究員 (80746206)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 微小気泡 / クーラント / 熱伝達 / 熱流束 / 切削性 / タッピングトルク試験

Outline of Final Research Achievements

The purpose of this research is to clarify that the heat transfer coefficient of cutting coolant which changes the type of coolant and concentration of ultra-fine bubbles, and to improve the heat transfer coefficient of the coolant. In this study, we constructed a heat flux measurement device. Using the constructed measurement device, we conducted experiments to measure the heat flux of various type of coolants and coolants with ultra-fine bubbles, and investigated the effects of ultra-fine bubbles on heat transfer. We also investigated the conditions under which ultra-fine bubbles effects by changing the diameter of the nozzle that supplies the coolant. We also investigated the effects obtained by changing the diameter of the nozzle that supplies the coolant containing ultra-fine bubbles. The obtained results suggested the conditions under which ultra-fine bubbles influence coolant.

Free Research Field

精密加工

Academic Significance and Societal Importance of the Research Achievements

各種クーラントおよびクーラント供給ノズルお熱流束測定結果から工具を効果的に冷却するには流速が重要になることが示唆された．この結果は，機械加工におけるクーラントの新たな適用方法を考える上で参考になると考えられる．また、本研究を通じて微小気泡が機械加工のクーラントとして万能ではないことが示唆されたことは意義深いと考えらる．