Patent ID: 8082771
Filing Date: 2011-12-27
Classification: B21J,B30B

Abstract:
1. 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.