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Highly Efficient EB polishing of metal mold with 3D shape by guiding EB under control of magnetic field

Research Project

Project/Area Number 18K13673
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 18020:Manufacturing and production engineering-related
Research InstitutionOkayama University

Principal Investigator

Shinonaga Togo  岡山大学, 自然科学研究科, 助教 (60748507)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords大面積電子ビーム / 金型 / 表面平滑化 / 磁場 / ビーム誘導 / 電磁場解析 / 高アスペクト比 / 穴底面 / 電子ビーム / 表面仕上げ / 電子軌道 / 3次元形状 / 磁場制御
Outline of Final Research Achievements

Bottom surface smoothing of high aspect ratio hole by EB polishing was proposed. As a basic study for control of magnetic field, magnet was set under the hole bottom surface, and magnetic field lines near the workpiece in large-area EB irradiation were calculated by electric magnetic field analysis. The magnetic field lines distributions show that the EB can be guided to the hole bottom surface since electrons tend to spirally move along the magnetic field lines. Experimental results clarified that the bottom surface of high aspect ratio hole can be uniformly smoothed by guiding the EB to the surface under control of magnetic field.

Academic Significance and Societal Importance of the Research Achievements

大面積電子ビームを用いた表面仕上げ技術(EBポリッシング)は,平坦形状や緩やかな凹凸形状を有する金型や金属部品の表面仕上げに一部実用化されている.しかしながら,高アスペクト比の穴形状などを有する工作物では,穴入口や穴内壁の上部へ電子ビームが集中し穴底面全面の平滑化が困難であった.本研究では,磁場制御による電子ビーム誘導に着目し,はじめに,電磁場解析により電子ビーム照射時の工作物近傍の磁場を算出できることを明らかにした.さらに,磁場制御下でのEBポリッシングにより高アスペクト比穴底面仕上げが可能となった.本研究成果は三次元複雑形状金型の高能率表面仕上げに寄与するものと考えられる.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Journal Article] Alumina film sputter deposition on mold steel by large-area electron beam irradiation2020

    • Author(s)
      Togo Shinonaga, Masashi Takata, Motohiro Inoue, Akira Okada
    • Journal Title

      International Journal of Precision Engineering and Manufacturing-Green Technology

      Volume: 8 Issue: 5 Pages: 1393-1404

    • DOI

      10.1007/s40684-020-00243-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study on Improvement of Wear Resistance for Zirconia by Large-area Electron Beam Irradiation2019

    • Author(s)
      Togo Shinonaga, Mitsuhiro Kimura, Motohiro Inoue, Akira Okada
    • Journal Title

      International Journal of Electrical Machining

      Volume: 24 Issue: 0 Pages: 27-32

    • DOI

      10.2526/ijem.24.27

    • NAID

      130007785645

    • ISSN
      1341-7908, 2188-5117
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of magnetic property for workpiece on thickness of removal and modified layers in large-area EB irradiation2019

    • Author(s)
      Tsubasa Sakai, Togo Shinonaga, Akira Okada
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 85 Issue: 880 Pages: 19-00227-19-00227

    • DOI

      10.1299/transjsme.19-00227

    • NAID

      130007772936

    • ISSN
      2187-9761
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 大面積電子ビーム照射法による穴側面仕上げに関する基礎的研究2021

    • Author(s)
      盧家昱,篠永東吾,岡田晃
    • Organizer
      日本機械学会日本機械学会 中国四国支部 第59期総会・講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Fundamental Study on Micro-edge Filleting by Using Large-area Electron Beam Irradiation Method2020

    • Author(s)
      Zehua Zhou, Tsubasa Sakai, Togo Shinonaga, Akira Okada
    • Organizer
      18th International Conference on Precision Engineering (ICPE2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大面積電子ビームを用いたマイクロフィレット加工の曲率半径変化予測2020

    • Author(s)
      篠永東吾,周 澤華,岡田 晃,井上基弘
    • Organizer
      電気加工学会全国大会(2020)
    • Related Report
      2020 Annual Research Report
  • [Presentation] EBポリッシングによる複雑形状金型の表面仕上げ2019

    • Author(s)
      篠永東吾,岡田 晃
    • Organizer
      第225回電気加工研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Influence of Surface Temperature Field in Large-area Electron Beam Irradiation on Wear Resistance of Zirconia2019

    • Author(s)
      Togo Shinonaga, Tsubasa Sakai, Motohiro Inoue, Akira Okada
    • Organizer
      8th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fundamental Study on Surface Damage Repairing of AMed Metal Parts by Large-area Electron Beam Irradiation2019

    • Author(s)
      Taisei Watanabe, Togo Shinonaga, Atsushi Yamaguchi, Akira Okada
    • Organizer
      8th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Change of Thickness of Removal and Modifed layers on Workpiece with Different Material Property by Larg-area EB irradiation2019

    • Author(s)
      Tsubasa Sakai, Shoya Ota, Togo Shinonaga, Akira Okada
    • Organizer
      8th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Smoothing of Hole Bottom Surface by Guiding Electron Beam with Magnet2018

    • Author(s)
      Mituhiro Kimura, Togo Shinonaga, Motohiro Inoue, Akira Okada
    • Organizer
      The 3rd International Conference on Machining, Materials and Mechanical Technologies
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大面積電子ビーム照射法による高アスペクト比穴底面仕上げ2018

    • Author(s)
      木村充宏,篠永東吾,岡田 晃,井上基弘
    • Organizer
      電気加工学会全国大会(2018)
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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