Hydraulic device with multiple oil cylinders in linkage

Abstract

The invention discloses a hydraulic device with multiple oil cylinders in linkage. The hydraulic device mainly comprises an oscillating oil cylinder, a butt-joint oil cylinder, an injection oil cylinder, a hydraulic pump station, a high-pressure hydraulic control assembly, a medium-pressure hydraulic control assembly, a butt-joint oil cylinder hydraulic control assembly and a return hydraulic control assembly. The medium-pressure hydraulic control assembly supplies medium-pressure oil to the device, the high-pressure hydraulic control assembly supplies high-pressure oil to the device, the butt-joint oil cylinder hydraulic control assembly realizes butt-joint actions, and the return hydraulic control assembly realizes returning actions. The hydraulic device with multiple oil cylinders in linkage has the advantages that firstly, the hydraulic device is compact in structure, and linkage among the multiple oil cylinders can be realized; secondly, actions among the oil cylinders cannot be interfered mutually; thirdly, automatic oil supply of the oil cylinders can be realized during linkage of the oil cylinders, the oil cylinders are stable in changeover action, and hydraulic impact can be eliminated; and fourthly, corresponding interlock and time delay can be added to an electrical system so as to realize flexibility in control.

Description

technical field [0001] The invention belongs to the technical field of hydraulic control, and in particular relates to a multi-oil cylinder linkage hydraulic device used for the injection mechanism of an inner cavity metal extrusion molding machine. Background technique [0002] In the existing inner cavity metal extrusion molding machine, the injection device such as the injection device of the metal extrusion molding machine disclosed in Chinese patent CN102059269A, its action process is as follows: the swing oil cylinder controls the swing of the entire injection device, during the swing process In the process, the docking cylinder and the injection cylinder must be at the lowest position and cannot move; after the swing cylinder swings back, the docking cylinder and the injection cylinder are kept in a vertical state. At this time, the rodless chamber of the docking cylinder needs to enter the pressure oil to drive the injection cylinder. For upward movement, the rodless...

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Problems solved by technology

Due to the large number of oil cylinders in the injection device of the inner cavity metal extrusion molding machine, the action is complex, and the hydraulic pressure is large, so how to implement hydraulic control to ensure that all oil cylinders can work in accordance with the prescribed action sequence is a key to the success or failure of the injection device. The essential

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