| Project/Area Number |
25420063
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | Nippon Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 超音波放電加工 / 多結晶ダイヤモンド焼結体 / 形彫り放電加工 / ワイヤカット放電加工 / 加工能率 / 電極消耗率 / 放電・研削逐次加工 / 多結晶ダイヤモンド焼結体（PCD） / 特殊加工 |
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| Outline of Final Research Achievements |
For a purpose to improve electric discharge machinability of PCD composed of coarse diamond particles, which has been thought to be extremely difficult to EDM, in this study, a US-EDM method to give an ultrasonic vibration to an electrode in axial direction, flexural direction and complex direction that couples axial and flexural directions was attempted. As a result, it was found that EDM efficiency could be improved to 6 times higher than a standard efficiency obtained in machining conventional PCD and the electrode wear could be reduced to 1/2 by giving vibrations to the electrode in axial direction．
Furthermore, precise groove machining could be achieved on a cemented carbide workpiece by utilizing a combined method of EDM and grinding using only a single tool, i.e. a rotary PCD disc tool acting as an electrode for EDM and as a wheel for grinding.
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