Valve Controlling Cylinder System. Hydraulic Straightening Machine

Leveler, one of the important equipments in production line, is mainly used to correct the flatness of plate and strip. The mechanical leveler is dominant in domestic iron & steel corporation, meanwhile, the hydraulic leveler has been developed by aboard institute, but the crucial technology is still undisclosed to us. To break the blockade and achieve independence of intellectual property rights crucial technology, some domestic research institutes have begun deep study, but the technology from mechanical to hydraulic automatic control has become an obstacle hard to break.The electro-hydraulic servo position control system is the most critical technology of hydraulic leveler, its control performance also directly affects the quality of product. The theory of such system is still need to be improved and studied deep as the complexity of the control principle, and the static and dynamic characteristics of electro-hydraulic servo position control system impact on device performance. The simple and compact structure of single-rod hydraulic cylinder, but also a result of asymmetrical characteristics in both directions, has yet to need further study. This paper studies on the asymmetrical cylinder leveler and examines the solution of the extended and retracted inequality response approach for application to reference.Firstly, this paper compares several valve controlled cylinder systems, analyzes the differences and the factors causing these differences or the potential adverse effects, and seeks appropriate solutions. Then, analyzing the characteristics of valve controlling cylinder system with the parameters of the mathematical modeling and simulation, and make use of the highly visual characteristics of AMESim to analyze the asymmetric valve control asymmetric cylinder. By using the way of comparing the collected data and simulation results to find out the factors that lead to synchronization errors, these consequences would provide some guide for practical application. At the last of this paper, the content summarizes the conclusions, points out the existing problem, and puts forward to the meaningful work for the further research and extensive application.