Bidirectional compression hydraulic press intelligent hydraulic control system

Abstract

The present invention relates to a bidirectional pressing hydraulic machine intelligent hydraulic control system. Said system includes upper main cylinder, lower main cylinder, valve group, oil line, oil pump and oil tank. The described valve group includes upper and lower main cylinder proportion pump group, upper and lower main cylinder pump outlet valve group, supporting valve group, upper and lower main cylinder control valve group, conversion valve group, upper and lower main cylinder unloading valve group, communication valve group and unloading valve group.

Description

technical field [0001] The invention belongs to the technical field of hydraulic presses, and in particular relates to an intelligent hydraulic control system for bidirectional press hydraulic presses. Background technique [0002] At present, there are many ways to apply pressure to the powdery material to form it. The more advanced one is to use the two-way press forming technology of the hydraulic press. In the existing two-way press hydraulic press hydraulic control system, the upper master cylinder and the lower master cylinder are used The spool valve structure makes the upper master cylinder and the lower master cylinder of the hydraulic machine not have the function of communicating and maintaining pressure. Since the pressing pressure of the upper master cylinder and the lower master cylinder is not equal, the powder in the mold is under different pressure, and the pressing density of the pressed product is different. It is difficult to maintain uniformity; since th...

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Problems solved by technology

[0002] At present, there are many ways to apply pressure to the powdery material to form it. The more advanced one is to use the two-way press forming technology of the hydraulic press. In the existing two-way press hydraulic press hydraulic control system, the upper master cylinder and the lower master cylinder are used The spool valve structure makes the upper master cylinder and the lower master cylinder of the hydraulic machine not have the function of communicating and maintaining pressure. Since the pressing pressure of the upper master cylinder and the lower master cylinder is not equal, the powder in the mold is under different pressure, and the pressing density of the pressed product is different. It is difficult to maintain uniformity; since the control valve group in the hydraulic control system only has a relief valve with one pressure value, when the high-pressure relief valve is used to adjust the low pressure of the upper master cylinder or the lower master cylinder, it will be caused by the characteristics of the valve The pressure of the system is unstable, which cannot meet the requirements of different pressing processes and different mold changes, which directly affects the quality of the pressed products; in order to achieve the accelerated operation of the upper and lower sliders of the hydraulic press, some pump structures need to be added to the hydraulic control system. This leads to the overall hydraulic control system is not only huge but also complex in structure, increases the manufacturing cost of the hydraulic press, and also brings many difficulties to installation and maintenance; because the above-mentioned hydraulic control system has a single function, it cannot meet the needs of different pressing processes and various mold changes. Requirements, so it leads to low work efficiency and poor stability, which directly affects the quality of processed products

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