Closed-loop control method and system for both 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 improving maneuverability, enhancing adaptability, and facilitating control methods
CN104765283BActive Publication Date: 2017-09-15FOSHAN HENGLITAI MACHINERY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
FOSHAN HENGLITAI MACHINERY
Publication Date
2017-09-15

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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.
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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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