Dynamic analysis of high-speed precision press with clearance

Joint clearance is one of the most important factors that affect the dynamic accuracy of high-speed precision press.In order to study the effects of clearance on dynamic characteristics,the virtual prototype model of high-speed precision press with clearance under the condition of cyclical impact was established.In this model,the contact forces and the friction forces could be calculated by the nonlinear equivalent spring-damp model and the modified Coulomb's friction law respectively.Furthermore,the clearance joints could be described by the contact constraints between the massless arcs.By means of dynamic simulations,the effects of clearance and impact on kinematic characteristics of high-speed precision press were studied,the results of which can be adopted as references for designing and manufacturing the key components.