• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1995 Fiscal Year Final Research Report Summary

Development of Low Noise Blanking Press

Research Project

Project/Area Number 06045051
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionUniversity-to-University Cooperative Research
Research InstitutionNippon Institute of Technology

Principal Investigator

MURAKAWA Masao  Nippon Institute of Technology, Dept.of Mechanical Engineering, Professor, 工学部・機械工学科, 教授 (60129145)

Co-Investigator(Kenkyū-buntansha) KOGA Nobuhiro  Nippon Institute of Technology, Dept.of Mechanical Engineering, 工学部・機械工学科, 講師 (30215214)
MO Jianhua  Huazhong University of Science and Technology, Mecanical College, 機械学院, 講師
Project Period (FY) 1994 – 1995
Keywordsshearing / blanking / noise / press / elastic strain energy
Research Abstract

The research on decreasing vibration and noise during press working is of great importance for our society and environment. It is even inportant to research into decreasing said vibration and noise during blanking work in view of the material fracture involved leading to the consequent significant level of vibration and noise. It has been already speculated that the high level sound met during blanking is caused at or during so-called break through period or phenomenon, and that the maximum sound level found at this break through has a close relationship with the release velocity of elastic energy stored, e.g., within the press frames. However, even the state of art in this field has neither reached a level at which this break through can be rigorously and/or quantitatively defined nor provided any effective countermeasures to reduce the vibration and noise in question based on the elucidation of the break through.
Accordingly, first the present sutdy aimed at observed the break through phenomenon, and quantitatively determining the onset of break through. Then the author measured the punch (upper die) speed and the reduction speed of blanking force in order to obtain the release speed of the elastic energy, and finally verified the above speculation to be true by indepth observation and quantitative analysis on the data obtained. Further, based on the knowledge obtained, a blanking press with a hydraulic inertia damper was deeloped ; the press enabled to reduce the blanking noise more effectively and easily than the conventional blanking press. The present press developed by us have proved to be able to reduce the noise level of blanking presses by the amount more than 10dB from those without the damper.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 莫 健華: "プレス打抜き騒音に関する研究(第7報 油圧式慣性ダンパーによる騒音低減)" 第46回塑性加工連合講演会論文集. 111-112 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 古閑伸裕: "プレス打抜き騒音に関する研究(第6報 ブレークスルー開始点の確定方法)" 第46回塑性加工連合講演会論文集. 109-110 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 莫 健華: "プレス打抜き騒音に関する研究(第5報 実測した弾性エネルギ解放速度と音圧レベルとの関係)" 平成7年度塑性加工春季講演会論文集. 315-316 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 古閑伸裕: "プレス打抜き騒音に関する研究(第4報 2工程打抜き法騒音低減に関する調査と考察)" 第45回塑性加工連合講演論文集. 635-638 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Mo, Jianhua: "Effects of a hydraulic inertia type damper on reduction of blanking noise" The Proceedings of the 46th Japanese Joint Conference for the Technology of Plasticity. 111-112 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koga, Nobuhiro: "Determination method for the breakthrough staring point during blanking" The Proceedings of the 46th Japanese Joint Conference for the Technology of Plasticity. 109-110 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Mo, Jianhua: "Consideration on the relation between the measured rate of elastic energy released during break-through of blanking and the maximum sound pressure level" The Proceedings of the 1995 Japanese Spring Conference for the Technology of Plasticity. 315-316 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koga, Nobuhiro: "Further investigation into the noise caused during a two step blanking method" The Proceedings of the 45th Japanese Joint Conference for the Technology of Plasticity. 635-638 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1997-03-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi