Molding pressure control system for hydraulic molding machine and control method thereof

Abstract

Provided are a molding pressure control system for a hydraulic molding machine and a control method thereof. The molding pressure control system for the hydraulic molding machine comprises a controller and a hydraulic system, wherein an outlet of a low-pressure variable-quantity constant output pump in the hydraulic system is connected with a safety valve I through a hydraulic pipeline, the safety valve I is connected with an oil inlet of a check valve I through a hydraulic oil way, one way of the oil outlet of the check valve I is connected with an accumulator, and the other way of the oil outlet of the check valve I is connected with an oil inlet of a check valve II. An outlet of a high-pressure variable-quantity constant output pump is connected with a safety valve II through a hydraulic pipeline, the safety valve II is connected with an oil inlet of a check electromagnetic switch valve through a hydraulic oil way, an oil outlet of the check electromagnetic switch valve is connected with an oil outlet of the check valve II, one way of the oil outlet of the check electromagnetic switch valve is connected with a pressing circuit, and the other way of the oil outlet of the check electromagnetic switch valve is connected with the accumulator through an electromagnetic switch control valve. The constant power variable quantity pump is used for directly pressurizing to molding pressure. The molding pressure control method is simple, high in repeated accuracy, quick in response, high in reliability and capable of obviously improving molding quality of raw bricks, simplifying hydraulic circuits and enabling the method to be simple and reliable.

Description

technical field [0001] The invention relates to a large-tonnage hydraulic forming machine, in particular to a forming pressure control system and a control method of a wall brick hydraulic forming machine, which are used to precisely control the brick forming pressure of the wall brick hydraulic forming machine. technical background [0002] In recent years, with the deepening of the innovation of wall materials, new environmental protection and energy-saving wall bricks, especially fly ash wall bricks, have been widely used. Play a decisive role in process control. The important parameters stipulated in the national standard of wall bricks: the external dimensions of wall bricks and the compressive strength of wall bricks have always fluctuated in a large range. The main reasons for the large fluctuations are: uneven distribution, large fluctuations in molding pressure, etc. Now Existing technologies have not improved much in solving the large fluctuations in brick for...

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Problems solved by technology

[0005] What the present invention aims to solve is the problems of fly ash brick appearance size and large fluctuations in compressive pressure caused by the poor repeatability and reliability of the brick adobe forming pressure of the hydraulic forming machine for fly ash bricks, and a hydraulic forming machine forming pressure control is proposed. System and Control Method

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