According to the structure and bearing characteristics of the WT700 CNC gear milling machine

the finite element model is established

the static and dynamic analyses of typical load case are carried out. The weak part is ram

the topology optimization of ram is achieved by compromise programming method

and the conceptual model of the ram is constructed. The meta structure of the ram is simplified

and the structure with excellent static and dynamic performance is obtained. The lightweight of ram structure is realized on the premise of keeping static and dynamic performance unchanged

and the experimental results show that the mass of ram is reduced by 18.75%.