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Annular magnetic hub for powder metallurgy and preparation method thereof

A powder metallurgy, ring-shaped technology, applied in the manufacture of stator/rotor body, magnetic circuit characterized by magnetic materials, etc., can solve the problems of low work efficiency, large volume, easy to heat, etc., to improve production efficiency, product quality High precision and improved magnetic permeability

Inactive Publication Date: 2010-12-29
吕元之
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also the following disadvantages: first, the iron loss is large, and it is easy to generate heat; second, the frequency of use is low, generally it can only work below 20KHZ, and the work efficiency is low; third, it is large and heavy, and it is inconvenient to install; fourth, it is not easy to dispose of Recycling can cause serious public hazards
The test proves that when the pure iron raw material content is less than 90%, its magnetic saturation rate is far from meeting the performance requirements of the magnetic permeable component

Method used

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  • Annular magnetic hub for powder metallurgy and preparation method thereof
  • Annular magnetic hub for powder metallurgy and preparation method thereof
  • Annular magnetic hub for powder metallurgy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Refer to attached figure 1 , 2 Preparation of the present invention. figure 1 , 2 An embodiment of a powder metallurgy circular magnetic hub prepared by the present invention is given. The powder metallurgy annular magnetic hub is characterized in that it is composed of a ring 1, the inner diameter of the ring 1 is 204.75mm, the outer diameter of the ring 1 is 213mm, and the height of the ring 1 is 24mm. There are rectangular magnetic teeth 2 with a rectangular cross section on the inner wall of the inner wall, the width of the rectangular magnetic teeth 2 is 3 mm, the distance between adjacent rectangular magnetic teeth 2 is 10.8 mm, and there are 46 rectangular magnetic teeth 2 in total. The inner wall of the ring 1 between the teeth 2 is provided with a groove 3 with a depth of 0.2 mm and a width of 2 mm; the composition of the ring 1 and its rectangular magnetic teeth 2 is as follows: the weight of pure iron powder is 100 Part, the weight of lubricant is 0.8 p...

Embodiment 2

[0048] The shape and manufacturing process steps of the powder metallurgy magnetic hub are the same as those in Example 1. However, improvements have been made in the ratio and where there is a limited interval: the composition of the ring 1 and its rectangular magnetic teeth 2 is as follows: the weight of pure iron powder is 100 parts, and the weight of lubricant is 1 part.

[0049] The depth of the groove 3 provided on the inner wall of the ring 1 between adjacent magnetic teeth 2 is changed to 0.1mm, and the width is changed to 3mm. After mixing, molding, pressing, sintering, cooling, and finishing, it is processed into products. In the mixing step, use pure iron powder as raw material, weigh 100 parts by weight, add 1 part of lubricant, and use a double-cone mixer for 50 minutes of mixing. In the sintering step, the sintering temperature is 1133°C, sintering at high temperature for 60 minutes, and cooling with the furnace. During this sintering process, the added lubrica...

Embodiment 3

[0054] The shape and preparation process of the powder metallurgy magnetic hub are the same as in Example 1, but improvements have been made in the ratio and where there are interval limits: the composition of the ring 1 and its rectangular magnetic teeth 2 is: pure iron powder The weight is 100 parts, and the weight of the lubricant is 0.5 parts.

[0055] The depth of the groove 3 provided on the inner wall of the ring 1 between adjacent magnetic teeth 2 is changed to 0.15mm, and the width is changed to 3mm. After mixing, molding, pressing, sintering, cooling, and finishing, it is processed into products. In the mixing step, pure iron powder is used as a raw material, weighing 100 parts, plus 0.5 part of lubricant, using a double-cone mixer, and mixing for 40 minutes. In the sintering step, the sintering temperature is 1127°C, sintering at high temperature for 40 minutes, and cooling with the furnace. During this sintering process, the added lubricant evaporates.

[0056] ...

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Abstract

The invention discloses an annular magnetic hub for powder metallurgy and a preparation method thereof, which are characterized in that: the annular magnetic hub is formed by circular rings; the inner diameter of each circular ring is 204.75 millimeters, the outer diameter of each circular ring is 213 millimeters, and the height of each circular ring is 24 millimeters; rectangular magnetic teeth with rectangular cross sections are arranged on the inner walls of the circular rings, and the width of each rectangular magnetic tooth is 3 millimeters; the distance between the adjacent rectangular magnetic teeth is 10.8 millimeters, and the rectangular magnetic teeth are 46; a groove of which the depth is between 0.01 and 0.2 millimeter and the width is between 1 and 3 millimeters is formed on the inner wall of the circular ring between the adjacent rectangular magnetic teeth; and the circular rings and the rectangular magnetic teeth comprise the following components in part by weight: 100 parts of pure iron powder and 0.5 to 1 part of lubricant. A finished product of the annular magnetic hub is formed by die manufacturing, mixing, press forming, sintering and finishing. The annular magnetic hub improves the magnetic conductivity greatly, so that the saturation induction density is the same as that of the magnetic hubs manufactured by silicon-steel plates.

Description

technical field [0001] The invention relates to an improvement of a motor magnetic hub, in particular to a powder metallurgy circular magnetic hub and a preparation method thereof. Background technique [0002] With the popularity of electric vehicles, more and more attention has been paid to the research and development of its magnetically conductive magnetic hub components. The magnetically permeable magnetic hub components currently used in electric vehicles are composed of silicon steel sheets and copper wires. The silicon steel sheets can be assembled into the required magnetic tooth shape, and the silicon steel sheets are treated with an insulating layer. On the tooth, when the copper wire is energized, the magnetic permeable member will generate a magnetic field. The advantage of using silicon steel sheets to make magnetic components is high saturation magnetic induction. But there are also the following disadvantages: first, the iron loss is large, and it is easy t...

Claims

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Application Information

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IPC IPC(8): H02K1/02H02K15/02B22F3/16
Inventor 周传秀吕元之张应波吴荣昌吴兆花
Owner 吕元之
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