Control method for automatic weighting of metal powder

Abstract

The invention discloses a control method for automatic weighting of metal powder, which has the advantages that the rotation speed of a feeding and driving motor is controlled by an improved proportion pulse width speed adjusting and control method, thus when the actual weight value of the metal powder in a weighting hopper is small, the rotation speed of the feeding and driving motor is high, and the feeding speed of the feeding and driving motor to the weighting hopper is high; when the actual weight value approaches to a target value; the rotation speed of the feeding and driving motor is low, and the feeding speed of the feeding and driving motor to the weighting hopper is low; the speed change of the feeding and driving motor is continuous, and the efficiency and the precision for feeding are both considered; a single microcomputer control system is adopted for the control system, so that the control method is relatively simple, and the cost is simultaneously reduced; in addition, as the feeding direction and the gravity direction of a screw feed mechanism arranged in a material storage hopper are consistent, the self gravity action of the metal powder is utilized while feeding, the uniformity and the stability for feeding are improved, and the system for achieving the whole control method is relatively simple.

Description

technical field [0001] The invention relates to a weighing method of metal powder, in particular to a control method for automatic weighing of metal powder. Background technique [0002] Powder metallurgy parts are made from metal powder through forming, sintering and necessary subsequent treatment. The performance of powder metallurgy parts is directly related to its density, and its density depends on the weight of metal powder added to the forming mold when sintering parts. Therefore, the efficiency and accuracy of metal powder weighing have a great impact on the quality, manufacturing efficiency and Cost has an important impact. For this reason, in recent years, many new technologies and methods have emerged in the research of automatic weighing and related technologies, such as: (1) A new type of dynamic quantitative weighing based on neural network technology as the control core and multi-factor coordination Control method; (2) According to the principle of dynamic m...

AI Technical Summary

Problems solved by technology

For this reason, in recent years, many new technologies and methods have emerged in the research of automatic weighing and related technologies, such as: (1) A new type of dynamic quantitative weighing based on neural network technology as the control core and multi-factor coordination Control method; (2) According to the principle of dynamic measurement, adopt a bus-based real-time, intelligent and networked dynamic weighing system; (3) Utilize the structural characteristics and working principle of PSD and combine the flexible high-speed real-time characteristics of FPGA A high-precision and small-range weighing system is designed. Although the above-mentioned automatic weighing system and control method can realize accurate weighing of powder, the control method is relatively complicated, the system structure is also relatively complicated, and the cost is relatively high.

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