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Study on Electro-Discharge Micro-Machining --- Machining of Micro-Spindles, Using a Travelling Wire Electrode ---

Research Project

Project/Area Number 60460087
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 機械工作
Research InstitutionThe University of Tokyo

Principal Investigator

MASUZAWA Takahisa  Institute of Industrial Science, University of Tokyo; Professor, 生産技術研究所, 教授 (60013215)

Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1985: ¥6,300,000 (Direct Cost: ¥6,300,000)
KeywordsEDM / Electro-discharge grinding / Wire electro-discharge grinding / Micro-machining / Micro-spindle / NC
Research Abstract

Methods for producing very thin spindles are required to obtain an electrode for micro-electro-discharge drilling or a punch for micro-punching. This project regards with developing a system which meets this demand. The wire electro-discharge grinding mehtod is tested of its possibility. The machining characteristics, applicabilities to a very thin spindle, micro-hole ED drilling, formation of rods with various shape etc. are tested. This method is a kind of electro-discharge grinding. A wire which travels along a wire-guide is used as the electrode. Differently from the usual WEDM, the discharge takes place at the guided position of the wire. It gives a high machining accuracy. Main experimental results using a prototype 2-axis-controlled equipment are as follows; (1) Longitudinal deviation of the diameter was less than 1 <mu> m. (2) Accuracy of the zero-adjustment of x-axis affected the finished diameter. (3) The descharge gap increased when the depth of cut or the discharge capacity was increased. These influences were reduced by setting the offset value as a table in the memory of the controller. (4) Change of the workpiece material gave little influecnce on the machining accuracy. However, the machining time and the machined surface integrity were affected. (5) Micro-holes were able to be ED drilled in various materials, using the spindle machined by this method. (6) A taper spindle could be machined by simultaniously controlling the X- and Z-axis. Finally, a 4-dimension-controlled equipment was constructed and the possibility of forming a poligon rods was confirmed.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] 増沢隆久,藤野正俊: 精密工学会誌.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Masuzawa, Takahisa and Fujino, Masatoshi: "Study on Wire Electro-Discharge Grinding" the Journal of Japan Society of Precision Engineering.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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