Hydraulic control system

Abstract

The invention provides a hydraulic control system, which comprises a main cylinder and an oil tank, wherein the piston cylinder of the main cylinder is connected with a sliding block. The hydraulic control system further comprises a PLC (Programmable Logic Controller) used for controlling descending, stroke returning, and descending speed and pressure of the sliding block connected with the piston cylinder of the control main cylinder; a proximity switch is arranged in an extending direction of the piston cylinder of the main cylinder; the oil tank is connected with a first oil opening of the main cylinder through a constant power variable pump, a cartridge valve, an overflow valve, a two-position four-way electromagnetic valve, a one-way valve, a cartridge valve with a shuttle valve, a throttling valve and a proportional valve in sequence. When the hydraulic control system machines a workpiece, descending speed of the sliding block can be adjusted through on-off of each electromagnetic valve in the cartridge valve of the hydraulic control system, and therefore idle running time of the sliding block is reduced; the working speed of the main cylinder is ensured by a variable curve of the constant power variable pump, and thus qualification rate of products is greatly improved, the phenomena that the products are stretched and scrapped due to the fact that a speed cannot be adjusted are reduced, and the hydraulic control system has strong practicality and obvious economic benefits.

Description

technical field [0001] The invention relates to a hydraulic control system. Background technique [0002] During the use of the hydraulic press, the existing control system of the main cylinder of the hydraulic press has certain limitations in the processing of workpieces with speed and pressure requirements. When a certain corner of the workpiece is stretched too fast, the workpiece will be broken. When the tensile speed is too small, the workpiece will wrinkle, and the insufficient or excessive pressure will cause the workpiece to fail to form or the workpiece will be damaged, which will affect the normal and smooth progress of the workpiece processing and production, and is not conducive to the improvement of production efficiency. The above problems are in the hydraulic press. Problems that should be solved during the design and production of the control system. Contents of the invention [0003] The purpose of the present invention is to provide a hydraulic co...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a hydraulic control system to solve the limitations in the prior art on the processing of workpieces with speed and pressure requirements, and the workpiece will be broken when the stretching speed is too fast at a certain corner of the workpiece. , When the stretching speed is too small, the product will wrinkle, and the insufficient or excessive pressure will cause the workpiece to fail to form or the product to be damaged.

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