Dynamic characteristics of the scanning system used in online measurement systems for large hot forgings

Abstract

The scanning system is the core of online measurement systems that are developed for large hot forgings. In this paper, the dynamic characteristics of a scanning system are described and its dynamic performance is improved by complete force balancing. According to the demands of the field environment of large hot forgings, the dynamic characteristics mainly comprise the reduction and amelioration of input torque, and the decrease of shaking force. To these ends, the input torque and the centre of mass (centroid) of the scanning system are derived in succession. Then the complete force balancing conditions are presented. From these conditions, the correlative dynamical parameters are adjusted, the shaking forces to the bearings are eliminated, and the input torques are reduced and ameliorated. Simulations and experiments are also conducted to verify the effect, and the fore-and-aft torques are compared. The results prove the decrease and amelioration of the input torque. This shows that dynamical parameter design is of great significance for the improvement of the dynamic characteristics of scanning systems.