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Tool Chucking Mechanism with Insensitiveness to Centrifugal Force for Ultra High-speed Spindle

Research Project

Project/Area Number 13650131
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 機械工作・生産工学
Research InstitutionSophia University

Principal Investigator

SHIMIZU Shinji  Sophia University, Dept.of Mechanical Engineering, Professor, 理工学部, 教授 (70146801)

Co-Investigator(Kenkyū-buntansha) SAKAMOTO Haruhisa  Sophia University, Dept.of Mechanical Engineering, Lecturer, 理工学部, 講師 (40276514)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordshigh-speed spindle / tool-chucking mechanism / centrifugal force / accuracy / stiffness / wedge mechanism / finite element method / contact condition / 有限要素法解析
Research Abstract

In order to improve accuracy and efficiency, the development of high-speed machining is demanded strongly. To achieve this demand, it is essential to develop the high-performance tool-chucking mechanism applicable to high-speed spindle. Under the high-speed rotation, accuracy and stiffness drop worse because of effect of large centrifugal force on the connection between the tool and spindle. To solve this problem, various types of double-face contact tool-interface are developing actively. By using those interfaces, the allowable rotational speed becomes higher. However, there is still the limit of the rotational speed possible to use those interfaces, and this limitation is one of the essential obstructions for speed-up of spindle in the future. In this study, to solve this problem essentially, the novel tool chucking mechanisms, which make use of the centrifugal force in order to strengthen the tool chucking force, is proposed. At first, the basic specification needed for the mechani … More sm is determined. And then, the basic model of the mechanism is designed, and its tool-chucking characteristics are examined with finite element method. Furthermore, the test model is actually made in order to measure the tool chucking performance. As the result, it is found out to be difficult to obtain enough tool-chucking torque, since the tolerances of the components are too severe to machine practically. Then the structure of the mechanism is simplified drastically and becomes insensitive to dimensional error of components. In addition, by incorporating the tool-stopper for locating tools and the guide mechanism for wedge movement, the performance of chucking action is improved. Finally, the characteristics of improved model are evaluated with theoretical analysis and finite element method, and then, followings are confirmed : the tool chucking force can be magnified more than ten times as strong as the drawing force. The mechanism provides almost same torque as conventional tool-chucks such as collet chucks. By action of the centrifugal force, the tool chucking force under the spindle rotation of 10,000min-1 becomes 18% larger than that under standstill. From above mentioned results, it can be said that the developed tool-chucking mechanism is applicable to ultra-high speed spindle. Less

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (8 results)

All 2002 2001 Other

All Journal Article (6 results) Publications (2 results)

  • [Journal Article] New Chucking Mechanism of Cutting Tool for Ultra High Speed Spindle (2)2002

    • Author(s)
      Shinji Shimizu et al.
    • Journal Title

      Proc.of 2002 Spring Meeting of The Japan Society for Precision Engineering A14

      Pages: 10-10

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Journal Article] Proposal of a Mechanism to Prevent the Chucking Force Reduction at High Rotational Speed in Milling Chuck2001

    • Author(s)
      Shinji Shimizu et al.
    • Journal Title

      The 3rd Manufacturing & Machine Tool Conference, The Japan Society of Mechanical Engineers No.01-20

      Pages: 73-74

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Journal Article] 「検査・処置を受ける子どもへの説明と納得」に関するケアモデルの実践と評価(その1)-検査・処置を受ける子どもと家族への説明に関する看護士の認識の変化-

    • Author(s)
      江本リナ, 蝦名美智子他
    • Journal Title

      日本看護科学会誌 (投稿中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Journal Article] 「検査・処置を受ける子どもへの説明と納得」に関するケアモデルの実践と評価(その2)-子どもの力を引き出す関わりと具体的な看護の技術について-

    • Author(s)
      松森直美, 蝦名美智子他
    • Journal Title

      日本看護科学会誌 (投稿中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Journal Article] 「検査・処置を受ける子どもへの説明と納得」に関するケアモデルの実践と評価(その3)-看護士の親に対する認識と実践の変化とケアの広がり-

    • Author(s)
      高橋清子, 蝦名美智子他
    • Journal Title

      日本看護科学会誌 (投稿中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Journal Article] 「検査・処置を受ける子どもへの説明と納得」に関するケアモデルの実践と評価(その4)-病棟への波及効果-

    • Author(s)
      笹木忍, 蝦名美智子他
    • Journal Title

      日本看護科学会誌 (投稿中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 清水伸二, 他2名: "ミーリングチャック高速回転時の把持力低下防止機構の提案"第3回日本機械学会生産加工・工作機械部門講演会講演論文集. No.01-20. 73-74 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 清水伸二, 他2名: "超高速回転対応エンドミルチャッキング機構の提案"2002年度精密工学会春季大会学術講演会講演論文集. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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