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Orientation pressing device and manufacturing method of radial orientation magnetic ring

A production method and orientation technology, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of large magnetic flux leakage, low magnetic performance of magnetic ring products, and inability to provide a strong enough orientation magnetic field, so as to improve orientation The effect of magnetic field strength, compact equipment structure and stable magnetic performance

Active Publication Date: 2013-03-20
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the problem that the method in the prior art has relatively large flux leakage, especially in the production of a magnetic ring with a large aspect ratio, which cannot provide a strong enough orientation magnetic field, resulting in a low magnetic performance of the magnetic ring product, and provides a A magnetic gathering technology using three excitation coils, with a compact structure, can effectively reduce magnetic flux leakage; using multiple orientation forming technology to reduce the aspect ratio of each orientation forming, increase the intensity of the orientation magnetic field, so as to achieve a large aspect ratio (magnetic ring height h / magnetic ring inner diameter r ≥0.5) Production of radially oriented magnetic rings Orientation pressing device and manufacturing method for radially oriented magnetic rings

Method used

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  • Orientation pressing device and manufacturing method of radial orientation magnetic ring
  • Orientation pressing device and manufacturing method of radial orientation magnetic ring
  • Orientation pressing device and manufacturing method of radial orientation magnetic ring

Examples

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Embodiment 1

[0042] Such as figure 1 , figure 2 , Figure 4 The illustrated embodiment is an orientation pressing device for radially oriented magnetic rings, the orientation pressing device is arranged on the support of a press, and the press includes an upper pressing head 1, a lower pressing head 2 and a controller 3; The orientation pressing device includes a female mold and three excitation coils 4; the cross section of the female mold is an equilateral triangle, and the female mold includes an upper female mold 5 made of a magnetically permeable material and a lower female mold 6 made of a non-magnetic metal material ; The inner end faces of the 3 excitation coils are respectively connected with three sides of the die, and the excitation coil is provided with a cylindrical main yoke 7 connected with the side of the die, and the outer end face of the main yoke is connected with the outer end of the excitation coil. The end faces are flush, and the outer end face of the main yoke an...

Embodiment 2

[0066] Produces radially oriented magnetic rings with a height of 60 mm and an inner diameter of 20 mm. When producing magnetic rings with a height greater than 50 mm, the magnetic powder will wear the upper female mold more, and the upper female mold is made of wear-resistant Cr12 material. The upper and lower core irons are made of iron-cobalt alloy, which has the advantage of high magnetic permeability.

[0067] Six orientation moldings are adopted, the first five molding pressures are 10 MPa, and the pressure is maintained for 5 seconds; the last molding pressure is 15 MPa, and the pressure is maintained for 10 seconds. The first five times of pressurization and holding time have increased compared with the production of short magnetic rings because the height of the female mold is limited in order to reduce the height of the magnetic ring after each orientation molding. It is also possible to choose the scheme of primary and secondary pressure increase.

[0068] Other s...

Embodiment 3

[0077] Produces radially oriented magnetic rings with a height of 40 mm and an inner diameter of 20 mm. When producing magnetic rings with a height of 30-50 mm, the upper die is made of No. 45 steel. No. 45 steel has the advantages of good wear resistance, moderate magnetic permeability and low price. The upper and lower core irons are made of iron-cobalt alloy material with high magnetic permeability.

[0078] Four orientation moldings are adopted, the first three molding pressures are 5 MPa, and the pressure is maintained for 3 seconds; the last molding pressure is 10 MPa, and the pressure is maintained for 8 seconds.

[0079] Other structural parts and steps in embodiment 3 are the same as in embodiment 1.

[0080]

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Abstract

The invention discloses an orientation pressing device and a manufacturing method of a radial orientation magnetic rind. The orientation pressing device is arranged on a support of a pressing machine. The pressing machine comprises an upper pressing head, a lower pressing head and a controller. The orientation pressing device comprises a female die, and three excitation coils. The cross section of the female die is in the shape of a regular triangle, the female die comprises an upper female die which is made of permeability magnetic materials and a lower female die which is made of non-magnetic metal materials. Inner end surfaces of the three permeability magnetic materials are respectively connected with three lateral surfaces of the female die, cylindrical main yoke iron which is connected with the lateral surfaces of the female die is arranged inside the excitation coils, outer end surfaces of the main yoke iron is flush with outer end surfaces of the excitation coils, and round sub yoke iron is arranged on the outer end surfaces of the main yoke iron and the outer end surfaces of the excitation coils. The orientation pressing device and the manufacturing method of the radial orientation magnetic ring has the advantages that the orientation pressing device is compact in structure, magnetic leakage is reduced, the orientation pressing of the radial orientation magnetic ring with large height-diameter ratio is achieved, the main yoke iron is effectively shortened, the magnetic leakage is reduced, and the intensity of an orientation magnetic field is improved.

Description

technical field [0001] The invention relates to the field of preparation of anisotropic magnetic materials, in particular to an orientation pressing device and a manufacturing method of a radially oriented magnetic ring. Background technique [0002] The radially oriented magnetic ring produced by the anisotropic permanent magnet material can be widely used in the field of permanent magnet motors. The technical difficulty in preparing radially oriented magnetic rings is mainly the orientation forming method. The existing one-time orientation forming technology has the problem of low orientation magnetic field for preparing radially oriented magnetic rings with large aspect ratio. At present, there are two main methods of orientation forming: one is the bipolar head hedging method, which is to use two opposite excitation fields of the same pole to generate an outwardly radiating magnetic field for orientation; the other is the quadrupole convergence method. The magnetic met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02B22F3/02B22F3/03
Inventor 郝忠彬
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD