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| Effects of Planetary Movement of Electrode on Aspect Ratio of Micro Hole Drilled by Micro EDM |
| ZHU Yingbao, YU Zuyuan, LI Jianzhong, GUO Xuejie, YIN Guoqiang |
(Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,
Dalian University of Technology, Dalian 116024, China) |
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Abstract Micro EDM has the ability to drill high aspect ratio micro holes in metallic materials. With the increasing
of depth of micro holes drilled by micro EDM, abnormal discharges appears frequently because machining debris and
gaseous bubbles cannot be effectively removed from hole. Therefore, the aspect ratio of micro hole is limited. While the
planetary movement of electrode can increase the aspect ratio of micro hole duo to improving machining debris removal
ability. The impact factors of the planetary movement parameters and electrical parameters on the aspect ratio of micro hole
are studied, Experimental results indicate that the aspect ratio of micro hole increases along with the increase of eccentric
radius and capacitor under different machining conditions. The planetary movement speed is irrelevant to the aspect ratio of
micro hole. These results are helpful for actual production to improve the aspect ratio of micro hole.
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2017, 
