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Development of quantitative evaluation method applying information entropy for abrasive grain distribution on tool surface

Research Project

Project/Area Number 21K03805
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 InstitutionUniversity of Yamanashi

Principal Investigator

Haramiishi Yasutake  山梨大学, 大学院総合研究部, 准教授 (10402489)

Co-Investigator(Kenkyū-buntansha) 清水 毅  山梨大学, 大学院総合研究部, 教授 (40293443)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords研削加工 / 情報量エントロピー / 砥粒分布 / 画像処理 / 偏光カメラ / 工具
Outline of Research at the Start

研削加工において,実際に材料を削り取る微小な砥粒切れ刃の状態を計測・評価することは重要です.この状態のうち切れ刃の形状も加工には影響しますが,その分布状況も影響すると考えられます.従ってこれらの分布の分散性(複雑さ,ばらつき)を定量的に評価する手法が必要となります.しかし広範囲に多数存在する砥粒の分散性を定量的に評価する方法はありません.本研究では,工具表面の砥粒の分布を計測する方法を構築し,計測結果について分布の分散性を情報量エントロピーを用いて定量的に評価する手法を確立します.そしてエントロピー評価と研削における加工能率・工具寿命・加工面の精度との関係を明らかにすることを目的とします.

Outline of Final Research Achievements

Measuring and evaluating the state of abrasive grains on the working surface of a grinding tool is important for processing. In this study, we used two approaches to measure and evaluate the state of abrasive grains. The first was to evaluate the distribution of abrasive grains over a wide area. A transferred image of the abrasive grain distribution was obtained using pressure-sensitive paper. And this was evaluated using a quantification method based on information entropy. The second was to measure and evaluate the state of individual abrasive grains using a polarized camera. Various image processing methods were used to evaluate the location and number of abrasive grains that were broken during processing. The correctness of these evaluation methods was confirmed through experiments.

Academic Significance and Societal Importance of the Research Achievements

これまで砥粒の分布状態を評価するには,砥粒同士の間隔(連続切れ刃間隔など)や砥粒密度を用いた評価しかありませんでした.しかし実際の砥粒分布には偏る場合があったり,均一に分布する場合があったりします.このばらつきを数値的に評価する方法はありませんでしたが,本研究によりばらつきを数値的に評価する方法を開発しました.これは研削加工における加工能率や加工精度の向上などに貢献できる技術です.また分布状態のばらつきを評価する他の分野にも適用可能な手法となっています.

Report

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

    (7 results)

All 2024 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Evaluation of Abrasive Grain Distribution of the Grinding Belt Based on Modified Information Entropy2024

    • Author(s)
      Haramiishi Yasutake,Shimizu Tsuyoshi
    • Journal Title

      International Journal of Automation Technology

      Volume: 18 Issue: 2 Pages: 189-197

    • DOI

      10.20965/ijat.2024.p0189

    • ISSN
      1881-7629, 1883-8022
    • Year and Date
      2024-03-05
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Evaluation of abrasive grain wear condition on the grinding belt by polarization camera2023

    • Author(s)
      Haramiishi Yasutake,Shimizu Tsuyoshi
    • Organizer
      The 25th International Symposium on Advances in Abrasive Technology (ISAAT2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 偏光カメラを用いた研削工具作業面の評価2023

    • Author(s)
      孕石泰丈、大平洸、清水毅
    • Organizer
      日本機械学会関東支部第29期総会講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 偏光カメラによる研削ベルト作業面上の砥粒状態の評価2022

    • Author(s)
      大平洸,孕石泰丈,清水毅
    • Organizer
      2022年度砥粒加工学会学術講演会(ABTEC2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] Improved information entropy evaluation of abrasive grain dispersibility in grinding2022

    • Author(s)
      Hikaru Ohira, Yasutake Haramiishi, Tsuyoshi Shimizu
    • Organizer
      The 24th International Symposium on Advances in Abrasive Technology(ISAAT2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 砥粒分散性の情報量エントロピー評価における分割領域の検討2022

    • Author(s)
      大平洸,孕石泰丈,清水毅
    • Organizer
      日本機械学会関東支部 第 28 期総会・講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 画像処理を用いた研削ベルトにおける砥粒分散性のエントロピー評価2021

    • Author(s)
      大平洸,孕石泰丈,清水毅
    • Organizer
      2021年度砥粒加工学会学術講演会(ABTEC2021)
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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