Quantitative feeding device for metal powder machining

Abstract

The invention relates to the technical field of metal powder processing, in particular to a quantitative feeding device for metal powder processing, which comprises a stock bin mounted on a bottom plate and further comprises a feeding pipe arranged below the stock bin, an air pump is arranged at one end of the feeding pipe, a conveying pipe is arranged at the other end of the feeding pipe, and one end, far away from the feeding pipe, of the conveying pipe is connected with an arc-shaped pipe. A feeding cavity is formed in the end, away from the conveying pipe, of the arc-shaped pipe and comprises an inner wall and an outer wall, a gap is formed between the inner wall and the outer wall and used for installing an external expansion connector, an external expansion cavity is formed in the outer wall of the feeding cavity and penetrates through the outer wall of the feeding cavity to be connected with the external expansion connector in a penetrating mode, and the inner wall of the feeding cavity is of a smooth flexible shrinkage film structure. The shrink film, the external expansion connector and the external expansion cavity jointly form a closed space, a piston and a pushing mechanism connected with the piston are arranged in the external expansion cavity, metal powder can be prevented from being blocked in the feeding cavity, and quantitative feeding can be achieved so that it can be guaranteed that the amount of the metal powder in a pressed blank is within a reasonable range.

Description

technical field [0001] The invention relates to the technical field of metal powder processing, in particular to a quantitative feeding device for metal powder processing. Background technique [0002] Powder metallurgy is a metal product formed by pressing and sintering metal powder as raw material. It has the advantages of energy saving, material saving, near-net shape, environmental protection, economy and high efficiency. It can effectively use raw materials to manufacture complex materials that are difficult to cast by traditional processes. Parts, and suitable for mass production, it is highly valued by the industry. [0003] When using powder metallurgy technology to produce parts with complex shapes, the metal powder needs to be fed into the compact through the feeding device, and the powder particles are in contact with each other, rubbed, and squeezed in the compact through the action of pressing force. Displacement and deformation, and finally Forming, but in the...

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Problems solved by technology

[0003] When using powder metallurgy technology to produce parts with complex shapes, it is necessary to feed metal powder into the green compact through a feeding device, and the powder particles in the green compact contact each other through the action of pressing force, friction, extrusion, displacement and deformation, and finally However, during the metal powder feeding process, it was found that the metal powder easily accumulates in the feeding chamber and forms blockages of various structures such as agglomerates, plugs, and arches, and the metal powder fed into the compact is too Too much or too little will affect the effect of parts compacting

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