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1989 Fiscal Year Final Research Report Summary

A High Precision Servomechanism of a Constant Speed for NC Machines

Research Project

Project/Area Number 63550177
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 機械力学・制御工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

EMURA Takashi  Tohoku Univ., Faculty of Engr., Professor, 工学部, 教授 (80005503)

Co-Investigator(Kenkyū-buntansha) ARAKAWA Akira  Tohoku Univ., Faculty of Engr., Assistant, 工学部, 助手 (60184264)
Project Period (FY) 1988 – 1989
KeywordsDirect-Drive / Phase-Locked-Loop / PLL / Servomechanism / Gear Finisher / Gear Hobber / NC Machines / Mechatronics
Research Abstract

The NC machine is useful for mass production. In particular, it is suitable for producing a complex machine element. However, the NC machine is not suitable for making a special component such as gears. For example, until several years ago, it had been unable to get high precision gears by NC cutting or NC grinding process. It is because a high precisely synchronized servomechanisms are required for NC gear process.
T. Emura of the head of this research project developed a very high precision servomechanism about ten years ago, and he tried to apply his servomechanism to gear cutting machines of NC type. Then he succeeded in cutting high precision gears by a NC hobber.
This research work is carried out in order to increase cutting or grinding speed by means of a direct-drive technique. Since the equivalent moment of inertia of the direct-drive servomechanism is extremely small, an inertial damper was used and the position loop-gain of the servomechanism was increased sufficiently in order to decrease the rotary vibration of a servo- spindle. Moreover the authors applied a new PLL developed by T. Emura to their high speed servo-spindle. After experiments, they succeeded in rotating their spindle at a speed of 4,000rpm and with the accuracy of 20"pp. These speed and accuracy are high enough for NC gear hobbers and NC gear grinders.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Takashi EMURA: "A Study of High Precision Servo-spindle for Hard Gear Finishng Machine" Proc.of Int.Con.on Advanced Mechatronics(JSME,Tokyo,Japan). 427-432 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takashi Emura: "A Study on a Numerically Controlled Hobbing Machine Using Direct-Drive Servomechanism" Proc.of Int.Power Transmission and Gearing Conf.(ASME,Chicago,U.S.A.). 697-704 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 鐘兆偉: "ダイレクト・ドライブ式NCホブ盤に関する研究(第2報,歯切精度向上の検討)" 日本機械学会論文集-C編. 55. 2259-2265 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Zhao-Wei Zhong: "Direct-Drive NC Hobbing Machine(Increase of Servo-Stiffness by using Inertial Damper)" JSME International Journal,Ser.3. 31. 470-475 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takashi EMURA: "A Study of High precision Servo-Spindle for Hard Gear Finishing Machines" Proc. of Int. Con. on Advanced Mechatronics (JSME, Tokyo, Japan), pp.427-432, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takashi EMURA: "A Study on a Numerically Controlled Hobbing Machine Using Direct-Drive Servomechanism" Proc. of Int. Power Transmission and Gearing Conf.(ASME, Chicago, U.S.A.), pp.697-704, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Zhao-Wei ZHONG: "Direct-Drive NC Hobbing Machine (2nd Report, Investigation of Cutting Accuracy)" Trans. of JSME(C), 55-516, pp.2259-2265, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Zhao-Wei ZHONG: "Direct-Drive NC Hobbing Machine (Increase of Servo Stiffness by Using an Inertial Damper)" JSME Int. Jour.(3), 31-2, pp.470-475, 1988.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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