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[CN 201611036762.2] Electro-hydraulic Control Pressure Machinery with Feed Pressure Boosting Function and Return Pressure Dwell Function
[CN 201611036762.2] Electro-hydraulic Control Pressure Machinery with Feed Pressurization Function and Return Pressure Holding Function Title: Electro-hydraulic Control Pressure Machinery with Feed Pressurization Function and Return Pressure Holding Function Application Number: CN 201611036762.2 Applicant: Tianjin Xiujie Technology Co., Ltd. Application Date: 2016-11-22 Patent Type: Invention Application The present invention discloses an electro-hydraulic control pressure machinery with feed pressurization function and return pressure holding function, including an actuator and a hydraulic control mechanism; the hydraulic control mechanism includes: first and 2. three hydraulic pipelines; pressure reducing valve; first control unit; pressure boosting mechanism; second control unit; hydraulic buffer control mechanism. The pressure boosting mechanism of the hydraulic control mechanism cooperates with the hydraulic buffer control mechanism so that when the stamping rod enters the third stroke section to cause the elastic-plastic deformation of the workpiece, the requirement for the pressure to gradually increase during the elastic-plastic deformation of the workpiece is met. The hydraulic control mechanism of the present invention makes the stamping rod conform to the pressure changes of the three stroke sections, so that the rigidity of the stamped workpiece is better. A return pressure holding mechanism is arranged on the return pipeline of the hydraulic control mechanism, and the return pressure holding mechanism makes the right chamber have a certain pressure, and the pressure makes the return speed of the stamping rod stable, so that the stamping rod will not impact the execution oil cylinder when returning.
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