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Precision Forming of Electric and Electronic Small Parts Made of Metal Foil Using Multi-functional Forming Machine

Research Project

Project/Area Number 12650117
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 機械工作・生産工学
Research InstitutionKumamoto University

Principal Investigator

MARUMO Yasuo  Kumamoto University, Graduate School of Science and Technology, Associate Professor, 大学院・自然科学研究科, 助教授 (90199927)

Co-Investigator(Kenkyū-buntansha) SAIKI Hiroyuki  Kumamoto University, Faculty of Engineering, Professor, 工学部, 教授 (40023238)
Project Period (FY) 2000 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2003: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsMetal foil / Forming / Deep drawing / Auxiliary sheets / Wrinkling / Blank holding pressure / Piercing / Impact forming / 深絞り成形 / 樹脂補助薄板 / 樹脂ダイス / 爆発衝撃エネルギ / 打抜き加工 / 曲げ加工 / 深絞り加工 / ニッケル箔 / 銅箔 / しわ抑制 / 微小部品 / 精密成形 / 知能化 / 破断抑制
Research Abstract

The blankholding pressure required to prevent wrinkling increased considerably with a decrease of blank thickness. The maximum deep-drawing stress also increased greatly with an increase of the blankholding pressure, according to the decrease of blank thickness. Fractures and wrinkles in deep drawing of metal foil occurred easily and the formability deteriorated. In order to form very thin shells without failure, blankholding pressure should be loaded along optimum paths. In addition to the failure due to the decrease of blank thickness, tooling imperfections such as ununiform contact between tools and the foil blank, unequal clearance along the circumference and inaccurate alignment between the punch, die and blank greatly influence the onset of wrinkling and fracturing. The use of auxiliary sheets in the formation reduced the influence of tooling imperfections and prevented wrinkling and fracturing.
Piercing fine holes in very thin sheets is important in manufacturing miniaturized parts. In piercing process by means of explosive-impulsive pressure, a punch is not required but only a die cavity is required. This process will be very effective for piercing fine holes. The explosive-impulsive intensity strongly influenced the state of pierced holes. The optimum intensity improved the quality of the pierced holes. The kind of foil materials and their mechanical properties also influenced the pierced holes.

Report

(5 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Yasuo Marumo: "Piercing Process of Very Thin Sheet Metal Using Explosive-Impulsive Pressure"First International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena. 62-62 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Deep Drawing of Nickel Foil and Stainless Steel Foil"Key Engineering Materials. 233-236. 353-358 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Effects of Lap Sheets on the Improvement of the Formability of Metal Foil"Journal of Materials Processing Technology. 113. 627-631 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 中川 亮: "補助薄板を用いた極薄肉容器の深絞り"日本機械学会九州学生会第34回卒業研究発表講演会論文集. 85-86 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 丸茂康男: "ステンレスレス鋼箔およびニッケル箔の深絞り"日本機械学会熊本地方講演会講演論文集. 37-38 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 丸茂康男: "補助薄板を利用した極薄シェル部品の成形"第1回九州材料/構造シンポジウム講演要旨集. 70-70 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Piercing Process of Very Thin Sheet Metal Using Explosive-Impulsive Pressure"First International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena. 62. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Deep Drawing of Nickel Foil and Stainless Steel Foil"Key Engineering Materials. Vols.233-236. 353-358 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Effects of Lap Sheets on the Improvement of the Formability of Metal Foil"Journal of Materials Processing Technology. Vol.113. 627-631 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakagawa Ryou: "Deep Drawing of Very Thin Shells Using Auxiliary Sheets"Proc. of the 34th Conference for Graduation Research in the Kyusyu Chapter of the JSME. 85-86 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Deep Drawing of Stainless steel foil and Nickel foil"Proc. of the Regional Conference in Kumamoto inr the Kyusyu Chapter of the JSME. 37-38 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo: "Forming of Small Parts with Very Thin Shell Using Auxiliary Sheets"The First Material/Structure Symposium in Kyusyu. 70. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuo Marumo et al.: "Piercing Process of Very Thin Sheet Metal Using Explosive-Impulsive Pressure"First International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena Abstracts. 66-66 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 丸茂康男, 濟木弘行: "補助薄板を利用した極薄シェル部品の成形"第一回九州材料/構造シンポジウム. 70 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yasuo Marumo, Hiroyuki Saiki: "Deep Drawing of Nickel Foil and Stainless Steel Foil"Key Engineering Materials. Vols.233-236. 353-358 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中川 亮, 塗木淳平, 丸茂康男, 濟木弘行: "補助薄板を用いた極薄肉容器の深絞り"日本機械学会九州学生会 第34回卒業研究発表講演会講演論文集. 85-86 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yasuo Marumo, Hiroyuki Saiki, Akira Onoue: "Effects of lap sheets on the improvement of the formability of metal foil"Journal of Materials Processing Technology. 113. 627-631 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 丸茂康男, 濟木弘行, 尾上 彰: "ステンレス鋼箔およびニッケル箔の深絞り"日本機械学会熊本地方講演会講演論文集. 37-38 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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