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The influence factors of control characteristics of accumulator fast forging circuit of pump-controlled hydraulic press were researched by using the method of power bond graph, the simulation research was done through Matlab/Simulink and the experiment was carried out on pump-controlled hydraulic press of 0.6 MN.The models of cylinder, pipe, accumulator, proportion variable radial piston pumps and movable crossbeam were established, while the power bond graph model of circuit and the Matlab/Simulink simulation model were deduced. In addition, the experimental system of pump-controlled hydraulic press of 0.6 MN was designed and established. The effects of forging frequency, forging stroke and initial pressure on the control characteristics of accumulator fast forging circuit of pump-controlled hydraulic press were investigated through simulation and experiment. The results indicate that the decreased forging stroke can result in an increased forging frequency and an improved forging precision within certain limits; meanwhile, the initial pressure of accumulator is higher, the response of circle is faster.
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