Bolted Connections Layout Design for Machine Tool Support Part

A novel optimization design method considering coupling of pressure distribution is proposed to provide theoretical support to the bolted connections layout design of machine tool support part. The data fitting method is used to characterize the pressure distribution on the interface of single bolt based on Gaussian function. The region of pressure distribution is represented by the ultimate impact radius of single bolt. The ultimate impact radius is corrected by the coupling of pressure distribution. The design schedule of bolted connections layout is established according to the corrected radius. This method is verified with a micro model of a real machine tool by analyzing the static and dynamic rigidity, and the feasibility of the micro model is confirmed by FEM and experiments. It is concluded that the maximum optimum reaches 13.86% in the first-order natural frequency of dynamic rigidity, and 18.16% in the static rigidity, and the static and dynamic performances of the machine tool can be effectively improved.