Finite element analysis of high-speed press

In order to reduce the vibration of high-speed press and enhance its work performance, the dynamic characteristics of its main parts and combined structure were analyzed by Finite Element Analysis Software ANSYS. The finite element models of the lathe bed, the base and the workbench were built up. The first five modal frequencies were extracted by free modal analysis. The analysis results showed that the low-order frequencies of the lathe bed were approximate to those of the base, which would cause vibration resonance. The bolt joints were equivalent with the model made of the linear spring-damper element COMBINE14 between two nodes in ANSYS. The finite element model of the combined structure was built up with 294 elements. The modal frequencies obtained by theoretical modal analysis were basically coincided with those obtained in modal experiment. This proved the rationality of the equivalent model of the bolt joints and the reliability of the modal analysis results of the combined structure. Changing the structure and dimension of the part and component increased the modal frequencies of the lathe bed and the base. This reduced the probability of the vibration resonance.