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US 8,082,771 B2Granted
Adjustable hydraulic press with both upper and lower double action
AssigneeJilin University
InventorsYuquan Song, Minghui Wang, Xiaofang Guan
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AssigneeJilin University
InventorsYuquan Song, Minghui Wang, Xiaofang Guan
Estimating the term…
The present invention discloses an adjustable hydraulic press with both upper and lower double action, specially suitable for the cylindrical gear formed by stamping or expanding, closed forging and the metal cold forming or metal hot forming of punching, finishing, flanging and drawing of sheet materials. The press comprises four columns, an upper beam, a main slide block, a hold down slide block, a fixing worktable, a floating worktable and a lower beam. A hydraulic chamber a of master cylinder fixed in the upper beam communicates to a hydraulic chamber of an auxiliary cylinder, a plunger of the master cylinder is connected to the main slide block and drives it. A hydraulic chamber of a gas-liquid power accumulator fixed in the main slide block communicates to a hydraulic chamber of a hold down cylinder, a plunger of the hold down cylinder is connected to the hold down slide block and drives it. A plunger of an ejecting cylinder fixed in the lower beam is connected to the floating worktable and drives it. The hydraulic press of the invention simplifies the hydraulic system of the existing hydraulic, improves utilization rate of energy, production efficiency and working accuracy of workpiece.
An adjustable hydraulic press with both upper and lower double action comprising a main body and a hydraulic system, wherein the main body comprises a column, an upper beam and a lower beam fixed on upper and lower ends of the column, a main slide block and a hold down slide block sliding fit with the column, and a fixing worktable and a floating worktable fixed on the column, characterized in that a plunger of a master cylinder fixed on the upper beam and plungers of four auxiliary cylinders fixed on the upper beam are connected to the main slide block and drive it, a hydraulic chamber of a gas-liquid power accumulator fixed in the main slide block communicates to a hydraulic chamber of a hold down cylinder fixed in the main slide block by a connecting pipe, a plunger of the hold down cylinder is connected to the hold down slide block and drives it, tools and moulds or ejecting mould can be fixed on an upper surface of a plunger of a ejecting cylinder, a snap ring groove is provided at an upper end of the plunger of the ejecting cylinder to elevate the floating worktable, a snap ring can be mounted in the snap ring groove or removed from it, after loading the snap ring, the plunger of the ejecting cylinder can eject the floating worktable to a predetermined height.
Dependencies are inferred from the claim text.