| Project/Area Number |
07555517
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Material processing/treatments
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| Research Institution | NAGAOKA UNIVERSITY OF TECHNOLOGY |
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Principal Investigator |
FUKUZAEWA Yasushi NAGAOKA UNIVERSITY OF TECHNOLOGY,FACULTY OF ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (10126477)
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| Co-Investigator(Kenkyū-buntansha) |
MAGARA Takuji MITSUBISHI ELECTRIC CORPORTATION,RESEARCH AND DEVEROPMENT,MANAGER, 開発部, 主事
MOHORI Naotake TOYOTA INSTITUTE OF TECHNOLOGY, FACULTY OF ENGINEERING,PROFFESOR, 工学部, 教授 (90126186)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥8,200,000 (Direct Cost: ¥8,200,000)
Fiscal Year 1996: ¥8,200,000 (Direct Cost: ¥8,200,000)
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| Keywords | insulating ceramics / electrical discharge phenomena / shape machining / assisting electrode / surface modification technology / spectroscope analysis / 導電性表面膜 |
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| Research Abstract |
This study was carried out to make a new machining system of the insulating materials with an electrical discharge machining (EDM) machine. The new machining method was developed and advanced by the investigators in these four years. In this research, the machining mechanism, the advanced machining technology to improve the machining characteristics and the new EDM control system were investigated. The following experiments and research were carried out. (a) the transition of machining characteristics from an assisting electrode to ceramics by the displacements of tool electrode was investigated with the measurement apparatus which was built for this experiment, (b) Effects of the assisting and tool electrode materials on the machining characteristics was investigated, (c) Discharge wave forms were investigated, (d) Spectrum of the discharge spark was analyzed by spectroscope. Si3N4 insulating ceramics was mainly used for the work piece in this research. The following results are obtained 1. The electrical discharge was generated between tool electrode and the electrical conductive layr which was made on the surface workpiece. The layr generation started at the transition region of machining from assisting electrode to ceramics. The carbon and alpha-SiC was the main component of the layr. They were generated from the dissolution of machining oil and workpiece. 2. TiN coating layr could be used for the assisting electrode instead of metal late. A rotational machining improved the machining rate and surface roughness. 3. Considering the suitable wave forms and some electrical power source conditions was changed.
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