Closed-loop control method and system giving consideration to time and pressure in powder pressing process

A pressing process, closed-loop control technology, applied in electrical program control, program control in sequence/logic controllers, etc., to achieve the effect of enhancing adaptability, facilitating control methods, and improving controllability

Active Publication Date: 2015-07-08
FOSHAN HENGLITAI MACHINERY
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a closed-loop control method and system that balances both time and pressure in the powder pressing process, which can solve the problem of both the accuracy of the target pressing force and the pressing speed

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  • Closed-loop control method and system giving consideration to time and pressure in powder pressing process
  • Closed-loop control method and system giving consideration to time and pressure in powder pressing process
  • Closed-loop control method and system giving consideration to time and pressure in powder pressing process

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The schematic implementation and description of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0039] Such as Figure 4 As shown, the closed-loop control method for both time and pressure in the powder pressing process described in this embodiment includes the following steps:

[0040] S10: Receive the expected pressing time, pressing force target value and proportional coefficient input by the operator.

[0041] The desired pressurization time T is entered by the equipment operator. Tartget and the pressure target value P. Tartget, and the proportionality factor K. The value range of the K value is determined by the inherent characteristics of the oil cylinder, that is, once the design of the main oil cylinder is determined, its inherent characteristics are ...

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Abstract

The invention relates to a closed-loop control method and system giving consideration to both time and pressure in the power pressing process. The method comprises the steps that expected pressurizing time, a target pressing force value and a proportion coefficient input by an operator are received; the slope of time to pre-compress oil is calculated; the initial output speed of a pressurizing valve is controlled; the real-time pressing time is detected and compared with the extreme pressing time to obtain an average of pressure; the average of pressure is compared with the target pressing force value; the average of pressure is compared with the initial closed-loop pressing force; the pressure establishing time is calculated; the pressure establishing time is compared with preset standard time to calculate the pressure establishing slope; the growing average pressure value and the practical pressure slope in unit time are calculated; the difference between the practical pressure slope and the pressure establishing slope is calculated; and the second output speed of the pressurizing valve is controlled. Relation between pressure and time is displayed, the control performance of a powder forming machine is improved, and the adaptability of the powder forming machine to powder is improved.

Description

technical field [0001] The invention relates to the field of manufacturing equipment for pressing powder materials, in particular to a closed-loop control method and system that adopts an industrial control computer and a programmable controller to take into account both time and pressure during the powder material pressing process. Background technique [0002] In the current ceramic powder molding process, the pressing force exerted by the pressing equipment on the powder affects the degree of powder bonding. If the pressing force is too high and the pressing speed is too fast, the air cannot be completely escaped; if the pressing force is too small, the powder will If the bonding strength between the materials is too small, the green body cannot be formed. [0003] Due to the adoption of spray powder making, the powder particles formed by this method are hollow spheres. Ceramic powder molding is to press these hollow spheres into a bonded green body. During the molding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 韦发彬陈保伟霍志恒罗成辉谢越林
Owner FOSHAN HENGLITAI MACHINERY
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