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[CN 201610677392.4] Servo pump-controlled hydraulic press with high precision positioning
[CN 201610677392.4] Title of a high-precision positioning servo pump-controlled hydraulic press: Application number of a high-precision positioning servo pump-controlled hydraulic press: CN 201610677392.4 Applicant: Jiangsu Guoli Forging Machine Tool Co., Ltd. Application Date: 2016-8-17 Patent Type: Invention Application The present invention relates to a high-precision positioning servo pump-controlled hydraulic press. The upper cavity of the main cylinder is connected to the oil tank through a charging valve, the suction port of the servo pump is connected with the oil tank through the first check valve and the first oil filter, the outlet of the servo pump is connected with the upper cavity of the master cylinder through the second electromagnetic reversing valve, and the outlet of the servo pump is also connected with the oil tank through the second check valve and the second oil filter. The lower cavity of the master cylinder is connected with the inlet of the third check valve, the outlet of the third check valve is connected with the outlet of the first check valve; the hydraulic control port of the liquid charging valve is connected with the B port of the first electromagnetic directional valve, the P port of the first electromagnetic directional valve is connected with the outlet of the third check valve, and the T port of the first electromagnetic directional valve is connected with the oil tank. The lower chamber of the master cylinder is also connected with the oil tank through the quick-down valve group. The hydraulic press can realize the control of "how much to how much", reduce energy consumption, reduce oil overflow and oil temperature rise, and realize high-precision control of the slider position.
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