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Development of spindle with motor function for ultra-precision machine tool

Research Project

Project/Area Number 13650136
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 InstitutionKanagawa University

Principal Investigator

NAKAO Yohichi  Kanagawa University, Mechanical Engineering, Associate Professor, 工学部, 助教授 (00260993)

Co-Investigator(Kenkyū-buntansha) URATA Eizo  Kanagawa University, Mechanical Engineering, Professor, 工学部, 教授 (90016452)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2002: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2001: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsUltra-precision Machine Tool / Spindle / Hydrostatic Bearing / Fluid Power Motor
Research Abstract

A purpose of this study is to develop a new spindle for ultra-precision machine. A distinction between the spindle and conventional spindle for ultra-precision machine tools is that proposed spindle uses water flow to generate power for spindle operation. In contrast, conventional spindle for the ultra-precision machine tools uses electric power. In the spindle, the water flow is utilized for important three functions of the spindle. The three functions are the follows;
(1) Support function: water hydrostatic bearings support the spindle body,
(2) Motor function: flow channels with simple geometries are designed inside the spindle body so that the water flow through the channels generates torque to rotate spindle body, and
(3) Cooling function: temperature controlled water minimizes the spindle deformation.
This study proposes the principle and structure of the spindle. A design procedure for the spindle is then introduced. Based on the procedure, software to determine a combination of optimum parameters was developed so that highest efficiency of the spindle can be obtained. In this study, optimum parameters to design the spindle with the following specifications were calculated by developed software.
(1) Rated rotational speed: 10,000 rpm
(2) Rated power: 50W
(3) Rated stiffness of the water hydrostatic bearings: 50 N/μm.
Experiments were carried out to investigate performances of the developed spindle. The experiments show smooth operations of the spindle, which indicates correct operations of the hydrostatic bearings and motor of the spindle. In addition, the experiments verify that performances of the motor and cooling function satisfy the design requirements. In contrast, stiffness of the water hydrostatic bearings does not reach the level of the specification, due to mainly the characteristic of the restrictors in the bearings. In future work, improvements of the bearing stiffness will be attained by altering diameter of the restrictors.

Report

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

    (11 results)

All Other

All Publications (11 results)

  • [Publications] Yohichi Nakao: "Spindle motor driven by fluid energy for ultra-precision machine tool"Proceedings of ASPE 2001 Annual Meeting. 215-218 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yohichi Nakao: "High-speed motor driven by fluid power"Proceedings of 5th JFPS. 543-548 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 中尾 陽一: "流体のエネルギーを利用して駆動する超精密スピンドルシステムの開発"新技術フォーラム2002. 35-36 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 中尾 陽一: "超精密工作機械用モータ一体型スピンドルの研究"神奈川大学工学研究所所報. 25. 66-69 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yohichi Nakao.: "Spindle motor driven by fluid energy for ultra-precision machine tool"Proceedings of ASPE 2001 Annual Meeting. 215-218 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yohichi Nakao.: "High-speed motor driven by fluid power"Proceeding of 5th JFPS. 543-548 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yohichi Nakao.: "Study on spindle with motor function for ultra-precision machine tool"Science reports of research institute for engineering Kanagawa University. 66-69 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yohichi Nakao: "Spindle motor driven by fluid energy for ultra-precision machine tool"Proceedings of ASPE 2001 Annual Meeting. 215-218 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yohichi Nakao: "High-speed motor driven by fluid power"Proceedings of 5th JFPS. 543-548 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中尾陽一: "流体のエネルギーを利用して駆動する超精密スピンドルシステムの開発"新技術フォーラム2002. 35-36 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中尾陽一: "超精密工作機械用モータ一体型スピンドルの研究"神奈川大学工学研究所所報. 25. 66-69 (2002)

    • Related Report
      2002 Annual Research Report

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

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