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[CN 201910445255.1] Hydraulic servo control system of hydraulic press with local loading
[CN 201910445255.1] Title of a hydraulic servo control system for a locally loaded hydraulic press: Application number of a hydraulic servo control system for a locally loaded hydraulic press: CN 201910445255.1 Applicant: Xi 'an Jiaotong University Application Date: 2019-5-27 Patent Type: Invention Application for a hydraulic servo control system for a locally loaded hydraulic press, including a low-pressure large-flow pump set and a high-pressure small-flow pump set connected to the oil inlet of the working condition switching valve, the two oil outlets of the working condition switching valve are respectively connected with the oil inlet of the first and second proportional valves or the servo valve; one oil outlet of the first proportional valve or the servo valve is connected with the rod-less cavities of the first loading oil cylinder and the third loading oil cylinder, the other oil outlet is connected with the rod cavities of the first loading oil cylinder and the third loading oil cylinder, and the first loading oil cylinder is connected with the third loading oil cylinder through a movable beam; the two oil outlets of the second proportional valve or the servo valve are respectively connected with the rod-free cavity and the rod-free cavity of the second loading cylinder; the loading cylinder is equipped with a pressure sensor, a force sensor and a displacement sensor, and the loading cylinder is realized by the controller to output the corresponding The displacement, pressure or output force; the present invention realizes multiple local loading after one heating of the workpiece, thereby obtaining the overall loading and forming capacity greater than the same installed power.
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