Hydraulic system of horizontal buffer cylinder of forging and pressing operating machine

Abstract

The invention discloses a hydraulic system of a horizontal buffer cylinder of a forging and pressing operating machine, which comprises an oil-feed port, a proportional pressure-reducing valve, a proportional directional valve, two safety valves, two check valves, a proportional overflow valve, an electromagnetic directional valve, a buffer cylinder, an oil return port, a displacement sensor and a displacement controller. The invention realizes the passive buffering of the buffer cylinder and the switching of an active feeding function through controlling the electromagnetic directional valve, realizes the control of passive buffering force through regulating the proportional overflow valve, realizes the control of active feeding force and buffering restoring force through regulating the proportional pressure-reducing valve, and realizes active feeding displacement and speed accurate control through the displacement closed-loop control of the proportional directional valve. The invention can finish the passive buffering and the active feeding function required by the horizontal buffering of the forging and pressing operating machine and realize the proportional control of force and displacement; and the hydraulic system has the advantages of simple structure and multiple functions.

Description

technical field [0001] The invention relates to a buffer cylinder hydraulic system, in particular to a horizontal buffer cylinder hydraulic system of a forging manipulator. Background technique [0002] The perfect horizontal buffer system of the forging manipulator should have the function of passive buffering and active feeding. The passive buffering function is used to reduce the direct impact of the clamp and the workpiece on the manipulator during the forging process or during the acceleration and deceleration of the manipulator. Its active feed function precisely controls the advance and retreat of the clamp during the rapid forging process of the manipulator. The existing manipulator buffer system has the following problems: [0003] (1) It does not have the active feed function or the switch between the active feed function and the passive buffer function is complicated, and it is difficult to realize the rapid feed function of the manipulator and the press; [000...

AI Technical Summary

Problems solved by technology

[0003] (1) It does not have the active feed function or the switch between the active feed function and the passive buffer function is complicated, and it is difficult to realize the rapid feed function of the manipulator and the press;

[0004] (2) Separate and independent control of the buffering force and the restoring force of the buffering cylinder after buffering cannot be realized;

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