Development of grinding wheels for high-speed reciprocation grinding and high-efficiency grinding of feat-resistant alloy

• Project/Area Number: 19K04120
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Iwate University
• Principal Investigator: Yoshihara Nobuhito 岩手大学, 理工学部, 准教授 (80374958)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: ハイレシプロ研削 / 難削材 / 高能率研削 / 研削面粗さ / 砥石摩耗 / 研削特性 / 耐熱合金 / 砥石

Outline of Research at the Start

ハイレシプロ研削における砥石磨耗メカニズムを明らかにし，砥石磨耗を抑制するための研削条件および砥石選定指針を明らかにする．また，明らかとなった砥石選定指針を基に，ハイレシプロ研削に適した砥石の開発を行う．さらにハイレシプロ研削の特性をいかして，耐熱合金の高能率・高精度研削を実現する．

Outline of Final Research Achievements

Purpose of this research is to develop a grinding wheel corresponding to the grinding mechanism of high-speed reciprocation grinding, to optimize the grinding conditions and to realize the application to the machining of difficult-to-cut materials. Therefore, grinding experiments were conducted to clarify the effect of the depth of cut of the abrasive grains on the wear of the grinding wheel. It was also clarified that the grinding temperature is low under the grinding conditions where the depth of cut of the abrasive grains is large, and the wear of the grinding wheel can be suppressed. Furthermore, it was shown that by applying this property, high-precision and high-efficiency grinding of heat-resistant alloys becomes possible.

Academic Significance and Societal Importance of the Research Achievements

インコネル718やワスパロイなどのニッケル基耐熱合金は航空産業など広く使用されるようになっている．しかし，これらの材料の熱伝導率は低く，研削熱の影響が大きくなるため砥石寿命が短くなることが問題となっている．ハイレシプロ研削の研削メカニズムを解明し，それに適用した砥石を選定することにより，これら難削材の高精度・高能率加工が実現する．

Research Products

• [Journal Article] Optimization of Grinding Conditions of Axisymmetric Aspherical Grinding (2022)
  • Author(s): 吉原信人，嶋田慶太，水野雅裕，厨川常元
  • Journal Title: Journal of the Japan Society for Precision Engineering Volume: 88 Issue: 2 Pages: 193-197
  • DOI: 10.2493/jjspe.88.193
  • NAID: 130008157999
  • ISSN: 0912-0289, 1882-675X
  • Year and Date: 2022-02-05
  • Peer Reviewed / Open Access
• [Journal Article] Optimization of Nano-Topography Distribution by Compensation Grinding (2022)
  • Author(s): Nobuhito Yoshihara, Masahiro Mizuno
  • Journal Title: International Journal of Automation Technology Volume: 16 Issue: 1 Pages: 32-37
  • DOI: 10.20965/ijat.2022.p0032
  • NAID: 130008139772
  • ISSN: 1881-7629, 1883-8022
  • Year and Date: 2022-01-05
  • Peer Reviewed / Open Access
• [Journal Article] Effect of the Abrasive Grain Distribution on Ground Surface Roughness (2022)
  • Author(s): Nobuhito Yoshihara, Haruki Takahashi, Masahiro Mizuno
  • Journal Title: International Journal of Automation Technology Volume: 16 Issue: 1 Pages: 38-42
  • DOI: 10.20965/ijat.2022.p0038
  • NAID: 130008139769
  • ISSN: 1881-7629, 1883-8022
  • Year and Date: 2022-01-05
  • Peer Reviewed / Open Access
• [Presentation] Roughness of Traverse Ground Surface (2020)
  • Author(s): 吉原信人
  • Organizer: 13th MIRAI Conference
  • Invited
• [Presentation] ハイレシプロ研削法による難削材の研削 (2019)
  • Author(s): 吉原信人，小野雅生，西川尚宏，水野雅裕
  • Organizer: 2019年度砥粒加工学会学術講演会
• [Presentation] Effect of the grinding efficiency on ground surface roughness (2019)
  • Author(s): Nobuhito Yoshihara, Masaki Ono, Naohiro Nishikawa, Masahiro Mizuno
  • Organizer: The 22nd International Symposium on Advances in Abrasive Technology
  • Int'l Joint Research