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.