Dynamic Structure Design of Large-Scale High-Speed Gantry Type CNC Milling Machine

Abstract

To design a milling machine with high static stiffness and machining precision, the three-dimensional (3-D) model and the finite element model of a large-scale high-speed gantry type CNC milling machine have been established according to the demand of engineering. The main components of the milling machine have been studied separately by static and dynamic analysis to make an optimal structure design. The results indicate that the structure of the milling machine has great static stiffness, little structural deformation, and good dynamic characteristics. The method used in this paper provides helpful theoretical guidance to the dynamic design of milling machine.

Vibration Characteristics Analysis of a High-Speed Horizontal Machining Center

“…[1,2] Analysis of dynamic characteristics of machine tool structure mainly adopts the methods of FEM modal analysis and experimental modal analysis. [3]The finite element analysis method can be used in structure design and optimization of machine tool [4], but the calculating results often different from the actual results. The experimental modal analysis can be applied to analyze the prototype machine and provide reliable data for structure optimization or improvement [5]，which shows the value of practical application.…”