2023 Fiscal Year Final Research Report
Development of quantitative evaluation method applying information entropy for abrasive grain distribution on tool surface
| Project/Area Number |
21K03805
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18020:Manufacturing and production engineering-related
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| Research Institution | University of Yamanashi |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
清水 毅 山梨大学, 大学院総合研究部, 教授 (40293443)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| 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 |
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| 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.
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| Free Research Field |
加工学，生産工学
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| 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．
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