A Structural Design Method for Five-axis Machining Center Based on Stiffness Matching

This paper proposes a conceptual design method which is used in the structure design of five-axis machine center. In this method, the main idea is to match the stiffness of the main components of the machine tool. The restriction and objective function are the static stiffness of the machine tool and to get the maximum value of the first order natural frequency of the machine, respectively. The sub-structure analysis method is employed to analyze the relationship of the frequencies between the machine and the main components. According the relationship and the restriction, the natural frequencies of the main components are gained as the basis for the design of the main components of five-axis machine center.