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Recrystallization phenomenon in laser assisted incremental sheet metal forming

Research Project

Project/Area Number 16K06008
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Production engineering/Processing studies
Research InstitutionShizuoka University

Principal Investigator

tanaka shigekazu  静岡大学, 工学部, 教授 (60197423)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsインクリメンタルフォーミング / レーザ / 強加工 / インクリメンタルフォーミン / 微細結晶粒 / 板成形 / レーザ援用成形 / 結晶粒微細化 / 材料加工
Outline of Final Research Achievements

In this research, we have fundamentally studied "CNC control of material structure (grain refinement etc.)" by "repetitive large strain introduction" which is the feature of incremental forming and "local heating" by laser combination. In particular, “strong processing (by incremental forming)” and “(laser assisted) dynamic recrystallization” are both powerful means of grain refinement, and the effects of various conditions on the refinement are investigated. Furthermore, a large strain was introduced into the material using a multi-step process to achieve grain refinement of around 1 μm.

Academic Significance and Societal Importance of the Research Achievements

本研究では,インクリメンタル成形の特徴である「繰返し大ひずみ導入」とレーザ併用による「局所加熱」により,「材料組織(結晶粒微細化等)のCNC制御」に関する基礎的検討を行っており,各種条件が結晶粒微細化に及ぼす影響を調べている.さらに,マルチステップ・プロセスを用いてより大きなひずみを材料に導入して,1μm程度の結晶粒微細化を達成した.
本研究の成果により製品上の総ひずみ量を制御して,それによる微細結晶粒分布を制御でき,製品上の組織分布を設計することができる.今後,生体適合性のよい純チタンに対してもこれを適切して高精度に制御できれば,新しい医療補綴物などの開発が可能となる.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Incremental sheet metal formed square-cup obtained through multi stepped process2018

    • Author(s)
      Shigelkazu Tanaka
    • Journal Title

      Procedia Manufacturing

      Volume: 15 Pages: 1170-1176

    • NAID

      120006606187

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Incremental sheet metal formed square-cup obtained through multi stepped process2018

    • Author(s)
      Shigekazu Tanaka
    • Organizer
      17th International Conference on Metal Forming September
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] リブ付きフランジのインクリメンタルフォーミング2017

    • Author(s)
      田中繁一
    • Organizer
      平成29年度塑性加工春季講演会
    • Place of Presentation
      じゅうろくプラザ,岐阜市,岐阜県
    • Year and Date
      2017-06-08
    • Related Report
      2016 Research-status Report
  • [Presentation] リブ付きフランジのインクリメ ンタルフォーミング2017

    • Author(s)
      田中繁一
    • Organizer
      平成29年度塑性加工春季講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] インクリメンタルフォーミングとその最新動向まで2017

    • Author(s)
      田中繁一
    • Organizer
      第3回日本機械学会イノベーション講演会(iJSME 2017)
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] インクリメンタルフォーミング技術の概要と最新動向2017

    • Author(s)
      田中繁一
    • Organizer
      静岡県機械金属工業協同組合連合会平成29年度工学セミナー
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2016-04-21   Modified: 2020-03-30  

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