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[CN 201711328919.3] Use method of hydraulic system of multi-cylinder linkage hydraulic press
[CN 201711328919.3] Title of Use Method of Hydraulic System of Multi-cylinder Linkage Hydraulic Press: Application Number of Use Method of Hydraulic System of Multi-cylinder Linkage Hydraulic Press: CN 201711328919.3 Applicant: Anhui Tianshui Hydraulic Machine Tool Technology Co., Ltd. Application Date: 2017-12-13 Patent Type: Application of Invention The present invention discloses a use method of hydraulic system of multi-cylinder linkage hydraulic press and belongs to the technical field of hydraulic press. It includes the control steps of quick down of the main oil cylinder, slow down of the main oil cylinder, pressure maintaining of the main oil cylinder, pressure relief of the main oil cylinder and return of the main oil cylinder. When the main oil cylinder is about to go down, cartridge valve III, cartridge valve VII and cartridge valve VI are opened, cartridge valve IV is closed, the upper chamber of the main oil cylinder enters oil, and the lower chamber of the main oil cylinder returns oil, press the workpiece; When the main cylinder is guaranteed, the cartridge valve Ⅶ and the cartridge valve Ⅷ are closed, the upper and lower chamber oil circuits of the main cylinder are disconnected, and the main cylinder is locked. When the main cylinder returns, the cartridge valve III is closed, the cartridge valve IV and the cartridge valve VII are opened, the lower chamber of the main cylinder enters oil, and the upper chamber returns oil. The invention can stably and reliably realize the control of the actions of large hydraulic press such as fast down, slow down, pressure holding, pressure relief and return.
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