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Manufacture method of permanent magnet

A manufacturing method and technology of permanent magnets, which are applied in the manufacture of permanent magnets, inductors/transformers/magnets, electrical components, etc., can solve problems such as low energy consumption, and achieve the effects of low equipment cost, high degree of orientation, and uniform magnetic properties.

Inactive Publication Date: 2012-05-30
湖南吉瑞斯材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has the advantages of uniform orientation, low equipment cost, low energy consumption, long service life and high production efficiency.

Method used

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  • Manufacture method of permanent magnet
  • Manufacture method of permanent magnet
  • Manufacture method of permanent magnet

Examples

Experimental program
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Effect test

Embodiment 1

[0035] attached image 3 According to the first embodiment of the present invention, the alternating magnetic field with a constant amplitude and a frequency of 0.1 to 100 Hz is used to orient the permanent magnet alloy powder, and the device for producing a permanent magnet with a high degree of orientation with a low orientation magnetic field intensity is a front sectional view ( image 3 (a)) and top sectional view ( image 3 (b)). The magnetic field generated by the coil 11 forms a magnetic circuit through the magnetically permeable yoke 10, and the path and direction of the magnetic field lines in the magnetic circuit at a certain moment are as follows: image 3 As shown by the dotted line superimposed with arrows in the top sectional view of (b), a working magnetic field air gap is formed at the symmetrical center of the yoke 10, and the female mold 14 is placed in the magnetic field air gap. After the lower pressing rod 15 drives the lower punch 16 to move upward int...

Embodiment 2

[0041] Figure 5 According to the second embodiment of the present invention, it is shown that the alternating magnetic field with a constant amplitude and a frequency of 0.1 to 100 Hz is used to orient the permanent magnet alloy powder, and the device for producing a permanent magnet with a high degree of orientation with a low orientation magnetic field intensity is a front sectional view ( Figure 5 (a)) and top sectional view ( Figure 5 (b)). Compared with the first embodiment, the coil 11 forming the alternating magnetic field in this embodiment is a single air-core coil, the female mold 14 is located at the central symmetrical position in the coil 11, and the Nd-Fe-B alloy magnetic powder is placed in the female mold 14 ; Input 380V, 50Hz electric current by AC power supply 17 in coil 11, form such as in alloy powder district 18 Figure 4 An alternating magnetic field with both forward and reverse magnetic fields is shown with a constant amplitude. The amplitude of t...

Embodiment 3

[0046] Image 6 According to the third embodiment of the present invention, the alternating magnetic field with a constant amplitude and a frequency of 0.1 to 100 Hz is used to orient the permanent magnet alloy powder, and the device for producing a permanent magnet with a high degree of orientation with a low orientation magnetic field intensity is a front sectional view ( Image 6 (a)) and top sectional view ( Image 6 (b)). Compared with the second embodiment, the coil 11 of this embodiment is a single square coil, and the periphery of the coil 11 is equipped with a magnetically permeable yoke 19 stacked with silicon steel sheets, and the female mold 14 is in the center of the coil 11 Symmetrical position, Nd-Fe-B alloy magnetic powder is placed in the female mold 14; 380V, 50Hz current is input into the coil 11 through the AC power supply 17, and the alloy powder area 18 is formed as Figure 4 An alternating magnetic field with both forward and reverse magnetic fields is...

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Abstract

The invention provides a manufacture method of a permanent magnet. The manufacture method comprises the following step of: arranging permanent magnet alloy powder in a forming mold in an alternating magnetic field which is provided with a positive magnetic field and a negative magnetic field, for orientation and compression, wherein the alternating magnetic field is generated by an alternating current which is input into coils; the alternating current has constant amplitude and frequency; and the frequency of the alternating current is in a range of 0.1-100 Hz in different orientation and compression processes. The invention has the advantages of uniform orientation degree, low equipment cost, low energy consumption, long service life, high production efficiency and the like.

Description

technical field [0001] The present invention relates to a manufacturing method of a permanent magnet, and more specifically relates to a method for orienting a permanent magnet alloy powder with an alternating magnetic field with a constant amplitude and a frequency of 0.1 to 100 Hz to produce a high-degree orientation magnet with a low orientation magnetic field intensity. The permanent magnet method. Such sintered permanent magnets are widely used in various industrial and civil motors, computers, electroacoustic devices, sensors, automobiles, medical instruments and industrial automation equipment and other fields. Background technique [0002] Widely used in modern permanent magnets in various types of motors, computers, electroacoustics, medical instruments, automobiles, sensors, and various industrial and civil instruments and equipment, mainly including sintered Nd-Fe-B, Sm -Co, and Sr(Ba)-based ferrites. As is well known in the art, in order to obtain excellent per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F41/02B22F3/12B22F3/03
Inventor 何若冲
Owner 湖南吉瑞斯材料科技有限公司
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