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Method for preparing oversized neodymium iron boron material

A super-sized, neodymium-iron-boron technology, applied in magnetic materials, inductor/transformer/magnet manufacturing, permanent magnets, etc., can solve problems such as product performance and production efficiency limitations, and achieve shortened labor cycle, improved labor efficiency, and high cost performance Effect

Inactive Publication Date: 2014-07-09
SINO MAGNETICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new production method of super-large size NdFeB to solve the limitation problem of the existing production method on its product performance and production efficiency

Method used

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  • Method for preparing oversized neodymium iron boron material
  • Method for preparing oversized neodymium iron boron material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Now take a large blank with a specification of 50*50*192 (the performance of this specification is N50, which is high performance) pressed by a conventional method and a small blank with a size of 50*50*39.9 bonded and fixed according to the method of the present application as an example, and the following comparison is made test:

[0029] After smelting, powder making, molding, and sintering processes, a total of 50 super-sized blanks are pressed and formed by conventional methods in this field, each with a size of 50*50*192. After sintering, observe its appearance, measure its size and record relevant data. Statistics, as experimental group 1;

[0030] According to the method steps provided by the present invention, the forming part is pressed according to the orientation direction of the decomposed blank specification of 39.9mm, that is, the single piece of the decomposed blank is a small blank with a specification of 50*50*39.9, and the appearance is observed after...

Embodiment 2

[0034] Now take a large blank with a specification of 50*50*229 (the performance of this specification is N45, low performance) pressed by a conventional method and a small blank with a size of 50*50*39.6 bonded and fixed according to the method of the present application as an example, and the following comparative test is done :

[0035] After smelting, powder making, molding, and sintering processes, a total of 50 super-sized blanks are pressed and formed by conventional methods in this field. Statistics, as experimental group 1;

[0036] According to the method steps provided by the present invention, the forming part is pressed according to the orientation direction of the decomposed blank specification of 39.6 mm, that is, the single piece of the decomposed blank is a small blank with a specification of 50*50*39.6. Record relevant data and make statistics. Then, under the condition of the same orientation direction, select the single-piece small blanks with the most rea...

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Abstract

The invention discloses a method for preparing oversized neodymium iron boron. The method is mainly used for decomposing oversized neodymium iron boron orientation face directions and dimensions, the neodymium iron boron is produced according to workblank of normal sizes, single workblank qualified in performance and size is obtained, single blocks most rational in size and shape matching are matched to be a group and adhere in a multiple adhesion mode, and the required oversized workblank is obtained. The method is high in cost performance, reduces cost and is high in performance pass rate and extremely remarkable for high-performance products; an existing press does not need modifying, the specification requirements can be met, and the cost is reduced. A die is simple to manufacture and convenient to install; the workblank with the required specification can be obtained through an existing production process, a special production line does not need arranging, and manpower and material resources are saved; labor efficiency is greatly improved, the labor cycle is shortened, and the yield is greatly improved.

Description

technical field [0001] The invention relates to the field of permanent magnet material processing, in particular to a preparation method of super-large-sized NdFeB permanent magnet materials. Background technique [0002] At present, the production of known sintered NdFeB goes through processes such as smelting, powder making, molding, sintering, machining, and surface treatment. In recent years, the application of nuclear magnetic resonance, ore dressing, and maglev trains has increased the output of permanent magnet materials NdFeB, and at the same time promoted the production of super-large permanent magnet materials NdFeB. To manufacture super-sized NdFeB magnets, the blanks are divided into three directions: free, pressed, and oriented. , The direction perpendicular to the orientation is the free direction, and the direction of the largest size among the three directions is the orientation direction. When the size of the free and pressing directions is more than 40mm, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F7/02H01F41/02
Inventor 杨慧赵保泽王月霞
Owner SINO MAGNETICS TECH
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