Study on new control system of electro-hydraulic proportional valve-control fast forging press

In this paper, a new type of electro-hydraulic proportional control system with three way cartridge valve is proposed. By establishing its mathematical model and simulation model, it is compared with the control system of the high pressure unloading valve. It is shown that the control performance of the proposed scheme is better than the system of the high pressure unloading valve. With accumulator as the auxiliary power source, the cost of manufacture and energy can be saved.