Finite element and experimental modal analysis of cliptype ball end mill

ZHANG Xian, ZHOU Haodong, WANG Yangyu, WANG Huiqiang, SHEN Bin

(Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,

Zhejiang University of Technology, Hangzhou 310032, China)

Abstract: Aiming at the vibration control of chiptype ball end mill and the optimization of milling stability in the machining process, based on the general finite element analysis(FEA) software ABAQUS, FEA model of ball end mill was established, modal characteristics of ball end mill were analyzed by FEA method, and then six extended natural frequency and modal shape were given.Meanwhile hammer excitation method was adapted to conduct modal experiment, modal parameter identification method for new technology PolyMAX was applied to deal with the experimental result, the stabilization chart of modal parameter identification was obtained, the possible modal frequencies were picked, and modal experimental results were compared with the FEA result.The results indicate that the FEA results are in accordance with modal experimental results, error of modal frequency is within 13%,the physical properties of the structure are reflected preferably, and the rationality of the finite element model is validated. The analytical results can provide a basis for vibration control and milling stability study for ball end mill.

Key words: ball end mill; finite element; experimental modal analysis; PolyMAX