Manufacturing equipment of NdFeB spheres

Abstract

The invention discloses an Nd-Fe-B sphere manufacturing device. The manufacturing device comprises two blocks of magnetic conductive plates buckled with each other, two flitch plates, an upper die punch and a lower die punch, wherein a plurality of semi-cylindrical die surfaces arranged side by side are respectively arranged on the opposite surfaces of the two magnetic conductive plates, and flitch plate grooves are respectively formed in the two sides of the die surfaces; the two flitch plates are respectively arranged in the flitch plate grooves of the two magnetic conductive plates buckled with each other, and a plurality of cylindrical die cavities arranged side by side are jointly formed by the semi-cylindrical die surfaces of the two magnetic conductive plates and the inner side surfaces of the flitch plates; the upper die punch and the lower die punch are cylinders matched with the cylindrical die cavities and can be arranged in the die cavities in a relative sliding way, and semi-ellipsoidal molding grooves are respectively formed in the opposite surfaces of the upper die punch and the lower die punch. With the Nd-Fe-B sphere manufacturing device, the sizes in all directions are consistent after the Nd-Fe-B sphere shrinks, the grinding allowance is small, the material investment cost is lowered, and the magnetic steel production efficiency is improved.

Description

technical field [0001] The invention relates to the field of sintered NdFeB, in particular to a manufacturing device of NdFeB spheres. Background technique [0002] At present, NdFeB magnets have the characteristics of small size, light weight and strong magnetism. They are the most magnetic permanent magnets today. The production specifications are generally cylinders or cuboids. However, for NdFeB spheres, the characteristics of NdFeB powder are different in the three directions of free, pressed and oriented. It is difficult to maintain spherical sintering and sintering. Therefore, direct molding is difficult for existing technology. of. [0003] The existing NdFeB spheres are usually pressed into cylinders or cuboids first, and then processed into NdFeB spheres by grinding and wire cutting. However, this kind of NdFeB sphere manufacturing method has a lot of material loss, which is labor-intensive and time-consuming. Its raw material utilization rate and processing effi...

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Problems solved by technology

But for NdFeB spheres, NdFeB powder has different shrinkage ratios in the three directions of free, pressed, and oriented, and it is difficult to maintain spherical sintering and sintering. Therefore, direct molding is difficult for existing technology. of

[0003] The existing NdFeB spheres are usually pressed into cylinders or cuboids first, and then processed into NdFeB spheres by grinding and wire cutting. However, this kind of NdFeB sphere manufacturing method has a lot of material loss, which is labor-intensive and time-consuming. Its raw material utilization rate and processing efficiency are low, resulting in a corresponding increase in production costs

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