Modal and Twist Stiffness Analysis about Milling Head
Milling head is the core component of a 5-axis CNC milling machine, modal and twist stiffness analysis is needed in its design process. Vibration characteristic of direct drive A/C milling head is been analyzed by finite element method (FEM), former four order vibration modes of the milling’s structure are given. The influence of the swing angle of the A-axis to the natural frequency of the milling head is analyzed. The natural frequencies when the milling head is working are interval values, the first order natural frequency is [120.48, 122.91], the second order natural frequency is [139.68, 142.08], the third order natural frequency is [328.68, 331.9], the fourth order natural frequency is [369.68, 372.45]. The twist stiffness that varies with operating state is computed. This computing provides technological support for design and improvement of this type of milling head.
M. Y. Zhang et al., "Modal and Twist Stiffness Analysis about Milling Head", Advanced Materials Research, Vol. 677, pp. 241-245, 2013