| Titanium alloy is used to make components of airplanes and engines because of its high strength, well mechanical properties and anticorrode, such as compressor's disk, fan impeller; However, because of the poor machinability of Titanium alloy and the poor rigidity of thin-walled component, it is usually produce fish scale-type defect due to chatter, and it decreases the efficiency of processing and cutting, shortens life expectancies of cutting tools and machine tools. Therefore, it is significant to research on the cutting stability of thin-walled Titanium alloy.Firstly, the paper analyzed the regenerated vibrate,forced vibration, and provided respective dynamics model;It provided the criterion of stability, using the lobe chart for analyzing the the system steady or not.It analyzed the stability of multi-degrees of freedom, provideing the method of protracting the lobe chart, analyzed the influence of frequency characteristics, geometry parameters of ball-end mill and cutting parameters for system stability,and provided the evaluation method of its limit of stability.Secondly, it expounded the method of machining for integrated impeler blades,and analyzed the technics speciality integrated impeler blades as thin-walled structure, point out the problem of integrated impeler blades finish machining and the method to solve the chatter.Finally, through the milling experimentation of TC11 alloy lamina, the paper studied the influence of cutting force and vibration with different cutting parameter.With the datum of experimentation, it found the region of cutting stability, and made out the lobe chart under the experimentation. The paper studied the influence of the angles of ball-end milling for TC11 alloy milling, analyzed the disciplinarian of lamina's cutting force and vibration when changing the rake angle, the first clearance angle, the second clearance angle and the helix angle,providing help for angles choosing.
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