Powder forming hydraulic machine multi-parameter modularization electro-hydraulic control system

Abstract

The invention discloses a powder forming hydraulic machine multi-parameter modularization electro-hydraulic control system. Various regulating units of an electro-hydraulic actuator regulating system are in one-to-one correspondence with electro-hydraulic actuator hydraulic cylinders of a powder forming hydraulic machine. In each regulating unit, an oil inlet of a hydraulic pump is communicated with an oil tank of the powder forming hydraulic machine, an oil inlet of a proportional overflow valve is communicated with an oil outlet of the hydraulic pump, an oil outlet of the proportional overflow valve is communicated with the oil tank of the powder forming hydraulic machine, an oil inlet of a proportional servo valve is communicated with the oil outlet of the hydraulic pump, a working oil port of the proportional servo valve is communicated with a corresponding electro-hydraulic actuator hydraulic cylinder, and an oil return opening of the proportional servo valve is communicated with the oil tank of the powder forming hydraulic machine. The hydraulic pump, the proportional overflow valve and the proportional servo valve of each regulating unit are respectively and electrically connected with an output end of a multispindle hydraulic controller. A main controller is connected with an industrial personal computer in a communicated mode, and an output end of the main controller is connected with an input end of the multispindle hydraulic controller.

Description

technical field [0001] The invention relates to a multi-parameter modularized electro-hydraulic control system of a powder forming hydraulic press, belonging to the technical field of electro-hydraulic integrated control of hydraulic machines. Background technique [0002] As the basic key equipment in the powder metallurgy production line, the powder forming hydraulic press has a direct impact on the production quality of powder metallurgy parts. From the analysis of the powder forming and pressing process, with the different product size, shape and precision requirements, there are differences in the requirements of powder forming hydraulic press powder loading, pressing method, pressing sequence, pressing pressure, pressing speed and other parameters. , especially some products with complex shapes and high precision requirements, have higher requirements for the control of the pressing action of the powder forming hydraulic press. Improving the control performance of the...

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Problems solved by technology

[0003] At present, the control of the pressing process of powder forming hydraulic presses in China is mainly based on switch control. The hydraulic control circuit mostly uses electro-hydraulic reversing valves to control the start and stop of hydraulic cylinders and the direction of movement. The hydraulic impact of the system is large, and it is difficult to achieve different products in powder. In the process of forming and pressing, there are different control requirements for various parameters such as the action sequence of each hydraulic cylinder, the pressing pressure and speed of the hydraulic cylinder, and the amount of powder loaded. There are deficiencies in control accuracy and other aspects

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