| Giant forging press is the key equipment to manufacture the high-precision huge die forging, which are used in the field of modern space carrying equipment, energy and transportation and metallurgy and chemical equipment. It plays an irreplaceable role in the construction of modern national defense, and it is an important symbol of the national basic manufacturing capabilities.Synchronous rectifying system has always been an important topic in hydraulic industry. In the loading process of the giant forging presses, eccentric moment always makes the moving beams inclined, this will affect the machining accuracy of the forging, even endanger the press’s security. Therefore, the synchronous rectifying system is an integral part of giant forging press, and it is also an important different symbol of the die forging press to the free forging press. This paper focuses on the use of advanced hydraulic technologies to achieve the stable and reliable high-precision synchronization system’s design, with the attitude of the moving beam research object, studies the control mechanism, the synchronization scheme and the prototype experiment. The main research work is as follow.1. The causes of eccentric torque of the giant forging presse is summarized, and sums up the characteristics of the synchronization system of the giant forging press, introduces the structure and operating principle of giant forging presses in the comparison the world’s advanced sync correction system, analysises of the force situation and force equilibrium equation of the movable beam, establishes the mathematical model based on the synchronous rectifying system of flow control,and alalysises the characteristics of the rectification of the movable beam,and provide a theoretical reference for set up the synchronization correction hydraulic circuit.2. AMESim hydraulic simulation software is selected to set up the model of critical valve components of the sync correction system, characteristicses of contrast simulation curve and the sample curve is comparede to verify the reliability and adaptability of the simulation system of the basic model of the valve components, and some simulations are made to observe the impact of the key components of the valve components to valve performance,it will provide evidence for setting up the experimental platform for optimization of valve components.Co-simulation modelSync of the correction system is set up, analysis the effects of the parameters of traditional PID control method,the duration of the system loading,the open of flow valves,the working pressure of the correction system and the pressure of return oil loop to the sync correction system,the impact on the performance of the synchronization system is analysesd of the flow control valve with portional throttle valves or proportion of tune speed??valves, it will provide the basis for the selection of the experimental prototype of the hydraulic components and system parameters.3. Reference to the theoretical analysis and simulation results,315T test test for hydraulic experimental platform was developed, and this experimental platform to build a drainage compensation sync correction system.Design an experimental program in the experimental platform, the performance curves of the synchronous rectifying system, to verify the correctness of the simulation results.The above studies have shown that the315T trials test experimental platform used in the proportional speed control valve to control the drain compensation synchronous correction system, a more satisfactory static and dynamic accuracy and speed.AMESim and Simulink co-simulation model, simulation data reliability in the design of a giant forging press the sync correction system to predict system performance, and the entire hydraulic system, an overall analysis and assessment. |
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