2013 Fiscal Year Final Research Report
Study on control of the three-dimensional shape and the function of the magnet by a local pulse energy input machining
| Project/Area Number |
23560134
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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 | Kogakuin University |
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Principal Investigator |
TAKEZAWA Hideki 工学院大学, 公私立大学の部局等, 教授 (40334148)
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| Co-Investigator(Kenkyū-buntansha) |
MOHRI Naotake 独立行政法人大学評価・学位授与機構, 学位審査研究部 (90126186)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 放電加工 / 永久磁石 / 熱エネルギ加工 / 磁石内部温度 / 表面磁束密度 |
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| Research Abstract |
It is difficult to machine permanent magnets by traditional machining such as turning, milling and grinding, because of magnetic force. However, EDM has been used for shape machining of magnetic materials.
In this study, to clarify the relationship between magnetic flux density and temperature distributions in depth direction of permanent magnet by EDM. The magnetic flux density of a machined neodymium magnet was measured. The results showed that the average temperature inside of the magnet is determined by the input energy, depending on the discharge conditions. A decrease of surface magnetic flux density after EDM is affected by the magnitude of the area and the amount of decrease is due to the increase of the internal temperature of the magnet. Therefore, it isn't determined by the magnetude of the simply input energy.
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