Vibration analysis and optimization design of profile sawing and milling machine tool

Abstract

At present, the common profile processing machine tools have a single function, and the use cost of the machining center series is high. In order to save costs and realize the multi-functional processing of profiles, a profile sawing and milling machine is designed. Mainly study the dynamic characteristics of the machine tool, suppress the vibration of the machine tool, and improve the machining accuracy. Through 3D modeling, ADAMS simulation, changing the thickness of the worktable, adding damping force and other methods, the natural frequency of the machine tool, the milling cutter mechanism and the amplitude of the worktable are obtained, and the structure of the machine tool is optimized. The results show that the resonance frequency of the self-excited vibration of the machine tool is mainly concentrated in the low frequency range of 0.1-100 Hz. The maximum frequency response of the machine tool is 18.19Hz with an amplitude of 39.84mm. The thickness of the worktable is increased by 20%, the maximum frequency response of the machine tool is shifted to the left by 0.41Hz, and the maximum amplitude of the worktable is reduced by 6.15mm. Adding the damping force, the maximum amplitude of the y+ and z- milling cutters is reduced by 3.96mm and 7.33mm respectively. It can be seen that the two optimal designs can effectively suppress the self-excited vibration of the machine tool, improve the machining accuracy, and make the machine tool design structure more completed and feasible.