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| Experimental Research on Five-axis Coordinated Micromilling of Micro Integral Impeller |
| LIANG Zhiqiang, FANG Ya’nan, ZHOU Tianfeng, GAO Peng, ZHANG Suyan,LIU Zhibing, WANG Xibin |
| (Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081,China) |
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Abstract As the key component of the micro engine, the machining quality of the micro integral impeller has a
direct effect on the performance of the micro engine. In view of the micro integral impeller characteristics of narrow flow
channel, large blade twist and long thick ratio of blade, a five axis micro milling method for machining micro complex and
twisted integral impeller is studied. Aiming at the problems of deformation, over cutting and collision interference in the
process of micro impeller machining, the machining process of micro impeller is planned. The constraint equation of the
tool diameter selection for channel cutting is established, and the maximum theoretical tool diameter is calculated. The cutting
process of the impeller is simulated by CAM software, thus, the correctness of tool selection and process planning is
verified. Through five-axis micro milling experiment, a high quality 7075 aluminum alloy impeller with diameter of 10mm,
6 blades, 0.15mm minimum blade thickness, and 0.58mm minimum distance between the adjacent blades is obtained.
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2017, 
