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[CN 201820707454.6] Precision Pressure Control System of Servo Pump Controlled Hydraulic Press
[CN 201820707454.6] Title of Precision Pressure Control System of Servo Pump Controlled Hydraulic Press: Application Number of Precision Pressure Control System of Servo Pump Controlled Hydraulic Press: CN 201820707454.6 Applicant: Jiangsu Guoli Forging Machine Tool Co., Ltd. Application Date: 2018-5-14 Patent Type: Utility Model The utility model relates to a precision pressure control system of servo pump controlled hydraulic press, which includes medium flow and large flow servo pumps driven by servo motors, the outlet pipelines of the two pumps are connected with the oil circuit of the upper chamber of the master cylinder through dynamic valve 7, and the oil circuit of the upper chamber of the master cylinder is also connected with the oil tank through dynamic valve 4 and proportional valve. The lower chamber pipeline of the master cylinder is connected with the outlet of cartridge valve 9. The inlet of cartridge valve 9 is connected with the oil tank through cartridge valve 5 and cartridge valve 8 respectively. Each working cycle of the hydraulic press includes the following actions in turn: automatic pressure supplement of the accumulator, stop pressure supplement of the accumulator, rapid downward movement of the slider, deceleration and pressurization of the slider, pressure maintenance of the slider, pressure relief of the slider, return and shutdown of the slider. The servo driver adopts the switching of flow control and PID adjustment control two modes to realize the stable pressurization of the slider, avoid the deformation of the parts caused by the pressurization overshoot, and the pressure relief is stable.
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