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Development of highly efficient machining technology for niobium-titanium alloys with low elastic modulus similar to bone

Research Project

Project/Area Number 20K04200
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 18020:Manufacturing and production engineering-related
Research InstitutionKanazawa Institute of Technology

Principal Investigator

Kato Hideharu  金沢工業大学, 工学部, 教授 (90278101)

Co-Investigator(Kenkyū-buntansha) 森本 喜隆  金沢工業大学, 工学部, 教授 (00290734)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords駆動型ロータリー工具 / ニオブチタン合金 / ヘール加工 / 高能率加工 / 切削機構 / チタニウム合金 / ロータリーヘール加工 / 高能率化 / インプラント / ダイヤモンド工具
Outline of Research at the Start

人工股関節置換術における問題として術後の人工骨ステム周りのゆるみがあり,これを回避するためには生体適合性に優れるだけでなく形状成形加工後も人骨に近い弾性率を有することが必要不可欠である.こうした点からニオブチタン合金材料を用いる必要があり,最終的には患者の幹部形状にフィットする形状に短期間で供給するカスタムメイド化の実現を目指す.本研究では,ニオブチタン合金材料を使用し,加工表面の材料組織的な信頼性を担保した上で丸駒チップ工具とシリンダ形状の円筒端面外周部を切れ刃とするロータリ工具を用いて切取り厚さを薄く制御することヘール加工との組み合わせによる高能率加工技術の構築を試みる.

Outline of Final Research Achievements

Niobium-titanium (Nb-Ti) alloy materials are composed of two elements, Nb and Ti, with low cytotoxicity. It is also expected to be used as an implant material because it has an elastic modulus close to that of human bone and is easy to supply primary molded products by precision casting methods. However, due to its high cohesion characteristics and low thermal conductivity, it has a short tool life and extremely high machinability, making it difficult to perform highly efficient machining. In this study, a rotary tool with a round insert or cylindrical end face periphery was driven and used in combination with hail cutting to enable highly efficient machining. In addition, a longer tool life is achieved in an environment with an oil mist supply. Furthermore, the cutting mechanism of this method is investigated and its usefulness is clarified.

Academic Significance and Societal Importance of the Research Achievements

Nb-Ti合金材料の高能率加工技術の開発においては,微細加工技術の開発においては、(a) 最適工具材料の選定と形状成形,(b) 極薄厚さの切りくずを生成する加工条件の把握と切削機構の解明が需要なポイントである.本研究ではシリンダ形状の円筒端面外周部を切れ刃とするロータリ工具を用いて切取り厚さを薄く制御することとヘール加工を組み合わせた加工法を提案し,切削温度を低減した高能率加工が可能であることを明らかとしている.これにより,生体適合性に優れ低い弾性率を有するNb-Ti合金の人工骨への適用への可能性を高められた.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2020

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

  • [Journal Article] High-Efficiency Machining of Titanium Alloy Using Combined Machining Method of Driven Rotary Tool and Hale Machining2022

    • Author(s)
      Yamazaki Yuto、Takada Tetsuo、Kato Hideharu、Sakamoto Shigehiko、Kanazawa Institute of Technology 7-1 Ohgigaoka, Nonoichi, Ishikawa 921-8501, Japan、Nakamura-Tome Precision Industry Co., Ltd., Hakusan, Japan
    • Journal Title

      International Journal of Automation Technology

      Volume: 16 Issue: 5 Pages: 520-527

    • DOI

      10.20965/ijat.2022.p0520

    • ISSN
      1881-7629, 1883-8022
    • Year and Date
      2022-09-05
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-efficiency machining of titanium alloy using combined machining method of driven rotary tool and hale machining2022

    • Author(s)
      Yuto Yamazaki, Tetsuo Takada, Hideharu Kato, Shigehiko Sakamoto
    • Journal Title

      International Journal of Automation Technology

      Volume: Vol.16 No.5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] High-efficiency machining of titanium alloy using combined machining method of driven rotary tool and hale cutting2021

    • Author(s)
      Yuto Yamazaki, Tetsuo Takada, Hideharu Kato
    • Organizer
      The 10th lnternational Conference on Leading Edge Manufacturing in 21St Century November 14 to 18,2021 Kitakushu,JAPAN
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイヤモンド被膜工具を用いたニオブチタン合金の ミーリング加工に関する研究2021

    • Author(s)
      川原直人,加藤秀治
    • Organizer
      2021年度精密工学会学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 駆動型ロータリー工具を用いたチタニウム合金のヘール加工に関する研究2021

    • Author(s)
      高田哲生、加藤秀治
    • Organizer
      2021年度精密工学会春季大会学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] ニオブチタン合金の高能率加工に関する研究2021

    • Author(s)
      川原直人、山崎悠登、加藤秀治
    • Organizer
      日本機械学会北陸信越支部第58期総会・講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] チタニウム合金を対象とした駆動型ロータリー工具を用いたヘール加工法に関する研究2020

    • Author(s)
      高田哲生、加藤秀治
    • Organizer
      2020年度精密工学会北陸信越支部学術講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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