| Liu Yu* ***（刘宇）,Sundaram Murali Meenakshi**,Zhao Fuling②*,Rajurkar Kamlakar P***.[J].高技术通讯(英文),2011,17(4):439~445 |
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| Study on manufacturing freeform surface parts in micro EDM based on skin effect theory① |
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| DOI： |
| 中文关键词: |
| 英文关键词: micro EDM, freeform surface, skin effect, tool shape |
| 基金项目: |
| Author Name | Affiliation | | Liu Yu* ***（刘宇） | | | Sundaram Murali Meenakshi** | | | Zhao Fuling②* | | | Rajurkar Kamlakar P*** | |
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| 中文摘要: |
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| 英文摘要: |
| Micro fabrication of freeform surface parts made of hard and brittle materials is always a tough job in micro machining field. This paper tries to fabricate freeform surface feature by using smooth surface of tool electrode after tool wear in micro EDM. According to the skin effect theory, the tool end shape in the stage of uniform wear can be changed by adjusting the frequency of discharge pulse. The electrical energy distributing rule of tool electrode section in RC circuit has been investigated under the influence of skin effect, and the law of spark location change has been summarized. The experimental studies demonstrate that different shapes of tool ends can be achieved by varying the pulse frequencies of discharge power supply. Additionally, a micro part of freeform surface feature with high precision and good surface quality has been successfully obtained by micro EDM through adopting the smooth surface after tool wear. |
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