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[CN 201610421402.8] Title of a Special 25-ton Press System: Application Number of a Special 25-ton Press System: CN 201610421402.8 Applicant: Application Date of Harbin Engineering University: 2016-6-12 Patent Type: Application of the Invention The present invention relates to a special 25-ton press system applied to the mold withdrawal process of energetic materials. A special 25-ton press system includes a mechanical system and an electrical system. The connection mode of the mechanical system is that the oil pump motor is connected with a one-way valve and then an electromagnetic overflow valve and a return valve are connected to flow back to the oil tank. The electro-hydraulic servo valve is installed between the overflow valve and the one-way valve and connected to a cavity of the oil cylinder. Two oil pipes are connected to the piston end and rod end of the hydraulic cylinder. A hysteresis position sensor is installed inside the hydraulic cylinder, install pressure sensors on the two oil pipes to measure the punch pressure, and fix the oil pipes on the workbench through the bracket. The invention can realize that the full stroke of the punch of the press is 700mm, and the punch pressure can be freely adjusted within 25 tons. Realize the feedback control of the speed and real-time position of the punch movement.
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