With the development of CNC machine tools toward high-precision

high-speed and greening

the advantages of lightweight CNC machines become more and more obvious. Taking ZN-XK2840 CNC gantry boring and milling machine as an example

this paper presents a lightweight design method of CNC machine tools based on particle damping technology. Firstly

the static property of the conventional CNC machine tool structure is analyzed by finite element method

the wall thickness is optimized

and the static property of the lightweight machine tool structure is analyzed to ensure that the maximum deformation and strength meet the requirements. Then analyze the dynamic property of conventional CNC machine tools such as modal characteristics

harmonic response. The particle damping technology can effectively reduce the vibration of the machine tool structure in the vibration transfer path. In this paper

through the establishment of particle system-gantry milling machine dynamics model

using discrete elemental dynamics software developed by ourselves to analyze the dynamic property of the machine tool with particle damper installed. By comparing with the dynamic property of conventional machine tools

it is found that the dynamic property of lightweight machine tool is better than conventional machine tools. According to the lightweight design

the gantry boring and milling machine with particle damper is installed. The acceleration amplitude and displacement amplitude are measured during the idling and milling process

which are all smaller than the conventional machine tools. Its weight is 53.8% lower than similar products

effectively reducing the weight.