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Compression molding mold for sintered nd-fe-b

A press-forming and NdFeB technology, applied in the field of sintered NdFeB press-forming molds, can solve the problems of blank deformation, blank orientation and magnetic declination, etc., to reduce friction, improve press-forming performance, and prevent deformation Effect

Inactive Publication Date: 2015-11-25
廊坊京磁精密材料有限公司
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  • Abstract
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Problems solved by technology

However, when compacting small-sized hollow square blanks, the requirements for the fluidity of the powder and the uniformity of powder loading are relatively high, and the requirements for the size and precision of the compact are also high. For hollow square blanks, the blanks are prone to deformation to varying degrees, which greatly affects the orientation and magnetic declination of the blanks.

Method used

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  • Compression molding mold for sintered nd-fe-b
  • Compression molding mold for sintered nd-fe-b
  • Compression molding mold for sintered nd-fe-b

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Embodiment Construction

[0026] The present invention aims to propose a new type of sintered NdFeB press-forming mold, which can avoid the deformation of the blank, make the orientation degree and magnetic declination of the blank unaffected, and improve the press-forming performance of the small-sized hollow square blank. .

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Such as Figure 1-Figure 5 As shown, the press molding mold for sintered NdFeB provided by the embodiment of the present invention includes a large magn...

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Abstract

The invention discloses a compression molding mold for sintered nd-fe-b. The compression molding mold comprises large magnet-conductive side plates, small non-magnet-conductive side plates and a non-magnet-conductive pressing plate, which can define a sealed forming chamber. Non-magnet-conductive contact plates for making contact with nd-fe-b powder are arranged on the inner walls of the large magnet-conductive side plates. According to the compression molding mold for sintered nd-fe-b, the non-magnet-conductive contact plates are used for replacing the large magnet-conductive side plates to make contact with the nd-fe-b powder, and accordingly friction produced between two ends of blank and the large magnet-conductive side plates during compression orientation of the nd-fe-b powder can be reduced; the blank orientation degree is improved, deformation of the blank after sintering is prevented, the magnetic declination of the blank is reduced, and the compression forming performance of small-size hollow square blank is improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet production equipment, in particular to a press molding die for sintered NdFeB. Background technique [0002] Sintered NdFeB has excellent magnetic properties and is widely used in medical, communication, electrical equipment, instruments, motors, etc. [0003] During the production of sintered NdFeB products, NdFeB powder needs to be pressed into blanks, and then the blanks are sintered to form sintered NdFeB products. In the process of pressing NdFeB powder, not only can the blank be pressed into a certain shape and size according to the customer's requirements, but it can also maintain a certain degree of crystal orientation in the magnetic field orientation during pressing. The performance of pressing not only affects the size of the blank for subsequent sintering, but also has a certain influence on the magnetic properties of the magnet. At present, in the production, most of the bl...

Claims

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Application Information

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IPC IPC(8): B22F3/03
Inventor 李文庆
Owner 廊坊京磁精密材料有限公司
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