Research On Technology Of Accuracy Control Of Synchronous System In800MN Giant Hydraulic Forging Press

Moving beam of The800MN giant hydraulic forging press should be kept synchronous under the multi-driven system, the precision of synchronization affected on the formed accuracy of forging works and satety of the machine. theoretical and experimental research has been done on the synchronous system of the machine in order to realize controlling precisely,and the main research content is listed as follows:Firstly the hydraulic circuit of the synchronous system was initial designed and analyzed in the whole, which include the choice of the main hydraulic components and the caculation of the other basical parameters, and then the mechanical model of beams can be gotten by the mechanical analysis, and then the mechanism model of the synchronous system will be derived from these analysis above combined with the models of the large-flow proportional valve and hydraulic cylinder, which can laid the foundation for control system designing of the synchronous system.Secondly a balanced liquid distribution method was put forward according to the characteristic of the synchronous system,which can uniformly distribute the liquid according the real compensate and leakage ability,and resultly it can solve the redundancy of actuor. The simulation results has shown the method more effective in the characteristic of liquid trace and reponse.Thirdly the appropriate controller was chosen in accordance with the requirement of synchronous system and its mechanical modal, the human-intelligence simulating control method was adopted to regulate the supplementing (draining) capacity of the synchronous system.The paper focuses on the realization of human intelligence simulating controller,which includes how to divide the control mode and how to adjust the control parameters,and then the digital simulations have been done about its reponse characteristic under variable type eccentric load and parameter perturbation. The simulation results has shown its intelligence and availability.And then taking the moving beam deflection into account, the fit installation location of the moving beam position measurement system was analyzed by using Marc software, and two new joining structure with rolling bearing and sliding bearings were put forward, the new structure are more reliable and more accuracy than the joining structure with movable block through constract analysis through analysis of error and vibration modal.Finally experiments about liquid distribution and human intelligence simulating controller have been done on the315T experimental forging press,and the experiments results is near to the simulation results,thus it has shown these two method availability.