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Testing Method to Identify Yield Parameters on Metal Powder Compaction for FEM Analysis of Compaction Failure Occurrence

Research Project

Project/Area Number 20K04204
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 InstitutionNara National College of Technology

Principal Investigator

Taniguchi Yukinori  奈良工業高等専門学校, 機械工学科, 准教授 (10413816)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsPowder Compaction / Drucker-Prager CAP model / Finite Element Method / Powder Metallurgy / 粉末冶金 / 粉末成形 / 有限要素法 / Drucker-Prager CAPモデル / 鉄粉末 / フェライト粉末 / 有限要素法解析 / 一面せん断試験
Outline of Research at the Start

金属粉末圧粉成形工程における様々な割れ発生事例の対処法として,有限要素法解析技術を活用したケーススタディが有用であるにもかかわらず,実生産現場での導入・運用が進んでいない.本研究では簡便な試験による降伏関数パラメータの同定手法を提案,一般化する.その手法の妥当性は複動プレス成形による成形割れ発生実証実験で検証する.主要な金属粉末について材料特性値データベースを構築し,パラメータ相互の依存関係の定式化を図る.

Outline of Final Research Achievements

In this study, we attempt FEM analysis for a series of compaction process, Which are Compacting into inner flange shape, Unloading of tools, And ejection from die cavity. FEM analysis of iron powder compaction process for inner flange shape has been performed to demonstrate shear yield behavior on unloading and ejection stage. Three different tool motion, semi-double and double action pressing were investigated. The magnitude of density distribution becomes narrow on double-action tool motion with adequate tool speed ratio, and it can be examined what speed ratio should be applied. It was possible to predict where cracks may occur by the evaluation of stress path in ejection stage.

Academic Significance and Societal Importance of the Research Achievements

近年,粉末成形の理論が確立され、有限要素法を適用し、型からの抜出し時の割れ発生を含めた圧粉工程設計の事前検討~最適化に活用できるようになった.ところが,金属粉末圧粉工程設計における活用例がみられない。これは,DPCモデルの降伏曲面形状が複雑であり,金属粉末においてはその形状を決定する降伏関数パラメータの同定手法が一般化されていないことに起因している.本研究成果は、簡便な試験によってパラメータを同定できることを示すとともに、解析によって不良発生事例を見える化できることを示したものである。既に活用されている鍛造解析と同様に、粉末成形の生産現場においても解析技術活用を推進できる点で意義がある。

Report

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

    (9 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Finite Element Analysis of Powder Die Compaction Process2022

    • Author(s)
      谷口 幸典
    • Journal Title

      PLASTOS

      Volume: 5 Issue: 53 Pages: 263-269

    • DOI

      10.32277/plastos.5.53_263

    • ISSN
      2433-8826
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Yield Parameters for Iron Powder Compaction on Different Particle Size2020

    • Author(s)
      Ogawa R、Fujii J、Taniguchi Y
    • Journal Title

      IOP Conference Series: Materials Science and Engineering

      Volume: 886 Issue: 1 Pages: 012060-012060

    • DOI

      10.1088/1757-899x/886/1/012060

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 種々の粉末降伏特性における圧粉成形のFEM解析2022

    • Author(s)
      谷口幸典,林真由
    • Organizer
      粉体粉末冶金協会講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 金型圧粉成形-抜出し行程のFEM解析 第2報 除荷行程における工具スプリングバックの影響2022

    • Author(s)
      谷口幸典,林真由
    • Organizer
      塑性加工春季講演会講演論文集
    • Related Report
      2022 Annual Research Report
  • [Presentation] Influence of punch spring back in powder die compaction by FEM analysis2022

    • Author(s)
      M Hayashi, K Kodama, and Y Taniguchi
    • Organizer
      The 12th TSME International Conference on Mechanical Engineering
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] フェライト粉末の力学的圧粉特性について2021

    • Author(s)
      谷口幸典, 林真由
    • Organizer
      粉体粉末冶金協会2021年度秋季大会(第128回講演大会)
    • Related Report
      2021 Research-status Report
  • [Presentation] 金型圧粉成形-抜出し行程の FEM 解析2021

    • Author(s)
      谷口幸典, 林真由
    • Organizer
      第72回塑性加工連合講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Prediction of shear crack occurrence on iron powder die compaction by FEM analysis2021

    • Author(s)
      Mayu Hayashi and Yukinori Taniguchi
    • Organizer
      International Conference on Design and Concurrent Engineering 2021 & Manufacturing Systems Conference 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 金属粉末圧粉体の弾性変形挙動に関する研究2020

    • Author(s)
      藤井惇平、谷口幸典
    • Organizer
      第71回塑性加工連合講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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