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Development of active stiffness control system to avoid chatter vibration

Research Project

Project/Area Number 20K14631
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Hayashi Akio  金沢工業大学, 工学部, 准教授 (50734430)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords工作機械 / びびり振動 / 剛性制御 / 安定限界線図 / 機械加工 / 振動制御 / 振動特性
Outline of Research at the Start

切削加工時に発生するびびり振動は,製品の仕上げ面性状に大きな悪影響を及ぼす現象であり,現状では切削条件(切り込み深さまたは主軸回転数)を変更することで,びびり振動の発生を回避している.だが,この手法は加工能率が低下するため,生産現場では有効な手段とはいえない.また,びびり振動は切削振動と機械振動の共振によって発生するが,振動特性を自在に変更できる工作機械は存在しない.そこで本研究では,加工中に工作機械の剛性を変化させ,機械自体の振動特性を制御する「アクティブ剛性制御システム」を構築し,同一の切削条件下でもびびり振動を生じさせず,加工能率に影響を及ぼすことのないびびり振動の回避を実現する.

Outline of Final Research Achievements

We carried out research with the aim of proposing a method and developing a system to avoid and suppress the occurrence of chatter vibration during machining by controlling the rigidity (dynamic characteristics) of machine tools. The effectiveness of the proposed method was demonstrated through simulations by changing the stiffness parameters. In addition, the rigidity of the actual machine was changed by applying tension to the press bar attached to the frame of the machine tool, and changes in mechanical dynamic characteristics were measured through hammering tests. It was confirmed that the stability limit diagram changed based on the results. Furthermore, we verified the chatter vibration suppression effect based on the transition of the stability limit diagram through machining experiments, and evaluated the validity and effectiveness of the proposed method.

Academic Significance and Societal Importance of the Research Achievements

切削加工時に発生する「びびり振動」は製品の加工精度や表面粗さなどに悪影響をおよぼすため、これを回避するために切削条件を調整して加工されている。一方で、高速・高精度な大量生産が望まれるため切削条件の変更は望ましくないことが多く、機械側での回避手法が求められている。本研究成果により、機械自体の剛性を変更することでびびり振動を回避することができ、所望の切削条件での加工が可能となることで、工作機械メーカとしては機械に振動回避機能を付与することで新たな性能を持つ機械開発ができ、これを利用する生産現場ではさらなる製品加工の高速・高精度化が見込まれる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2024 2022 2021

All Journal Article (1 results) Presentation (5 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Study on Method for Avoiding Chatter Vibration by Changing Machine Tool Rigidity2022

    • Author(s)
      Hayashi Akio, Shibata Okitoshi, Morimoto Yoshitaka
    • Journal Title

      International Journal of Automation Technology

      Volume: 16 Issue: 6 Pages: 853-861

    • DOI

      10.20965/ijat.2022.p0853

    • ISSN
      1881-7629, 1883-8022
    • Year and Date
      2022-11-05
    • Related Report
      2022 Research-status Report
  • [Presentation] Study on Dynamic Characteristics Control System of Machine Tools for Avoiding Chatter Vibration2024

    • Author(s)
      Akio Hayashi, Yoshitaka Morimoto, Shotaro Takeuchi
    • Organizer
      The International Symposium on Flexible Automation 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on chatter vibration suppression of pipe frame machine tools2022

    • Author(s)
      Okitoshi Shibata, Akio Hayashi, Yoshitaka Morimoto
    • Organizer
      ICPE2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study on method for avoiding chatter vibration by changing machine tool rigidity2021

    • Author(s)
      Akio Hayashi,Okitoshi Shibata, Yoshitaka Morimoto
    • Organizer
      LEM21
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] パイプフレーム工作機械の剛性制御2021

    • Author(s)
      池田怜央、柴田 興利、武田涼馬、林晃生、森本喜隆
    • Organizer
      日本機械学会北陸信越支部学生会 第50回学生員卒業研究発表講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] パイプフレーム工作機械のびびり振動抑制に関する研究2021

    • Author(s)
      柴田 興利、池田怜央、武田涼馬、林晃生、森本喜隆
    • Organizer
      精密工学会 第28回学生会員卒業研究発表講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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