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[CN 201720792939.5] Hydraulic press with fast return
[CN 201720792939.5] Title of a hydraulic press for fast return: Application number of a hydraulic press for fast return: CN 201720792939.5 Applicant: Jiangsu Guoli Forging Machine Tool Co., Ltd. Application Date: 2017-7-3 Patent Type: Utility Model The utility model relates to a hydraulic press for fast return, the piston of the main cylinder and the lower end of the piston rod of the fast cylinder are respectively connected with the upper end of the slider, and the upper end of the piston rod of the return cylinder is connected with the lower end of the slider, the top of the master cylinder is respectively connected with the oil tank through the charging valve, the top of the master cylinder and the corresponding charging valve are respectively connected with the main cylinder inlet pipe, the hydraulic control port of the charging valve is respectively connected with the charging valve control oil pipe, the upper chamber of the fast cylinder is respectively connected with the fast cylinder inlet pipe, the outlet of the supplementary pressure pump is connected with the return pressure oil pipe through the check valve, and the outlet of the return pressure oil pipe is connected with the lower chamber, the inlet of the accumulator is also connected with the inlet of the first cartridge valve, the outlet of the first cartridge valve is connected with the oil tank, the hydraulic control port of the first cartridge valve is connected with the B port of the first electromagnetic directional valve, and the T port of the first electromagnetic directional valve is connected with the oil tank. The sliding block of the hydraulic press is fast and the return speed is fast, and the hydraulic impact is small.
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