CN201975197U - Tile-shaped permanent ferrite magnet and die thereof - Google Patents
Tile-shaped permanent ferrite magnet and die thereof Download PDFInfo
- Publication number
- CN201975197U CN201975197U CN2011200976237U CN201120097623U CN201975197U CN 201975197 U CN201975197 U CN 201975197U CN 2011200976237 U CN2011200976237 U CN 2011200976237U CN 201120097623 U CN201120097623 U CN 201120097623U CN 201975197 U CN201975197 U CN 201975197U
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- magnet
- tile
- inner arc
- central angle
- die
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- Expired - Lifetime
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model provides a tile-shaped permanent ferrite magnet with a super-large inner arc central angle and a die thereof. The inner arc central angle of the magnet is 158 DEG. The die of the magnet comprises a cavity, a cavity wall and a lower die, wherein a non-magnetic Stellite layer is arranged between the lower die and the cavity. The tile-shaped permanent ferrite magnet with the super-large inner arc central angle has larger use radian and area when used in an automobile motor, larger magnetic flux, improved motor power, simple structure, significantly improved product qualification rate, and capability of improving the qualification rate of the tile-shaped magnet with the inner arc central angle larger than 150 DEG by above 90%, and is used for manufacturing the die of the magnet.
Description
Technical field
The utility model belongs to technical field of magnetic materials, specifically is a kind of permanent-magnet ferrite tile-shaped magnet and mould thereof.
Background technology
Permanent-magnet ferrite tile-shaped magnet purposes is very extensive, can be used for brake motor, Motor for ignition, wiper motor and ventilated machine on the automobile.The inner arc central angle of tile-shaped magnet is big more, and magnet uses face magnetic flux big more, and the power of motor is also big more.When but tile-shaped magnet is produced, the sintered body of different inner arc central angles, tension force that is subjected to and pressure and shrinkage are different, the inside and outside circle face easily cracks, and influences the qualification rate of product, and it is more little to be embodied in the inner arc central angle, qualification rate is high more, generally more than 98%, and the particularly inner arc central angle of big radian is greater than the tile-shaped magnet of 150o, and qualification rate has only about 50%.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of super large inner arc central angle permanent-magnet ferrite tile-shaped magnet and mould thereof.
Permanent-magnet ferrite tile-shaped magnet of the present utility model, the inner arc central angle that it is characterized in that described magnet is 150o-180o.
Described magnet, the inner arc central angle that it is characterized in that described magnet is 158o.
A kind of mould of making described magnet comprises die cavity, die cavity wall and counterdie, it is characterized in that being provided with between counterdie and die cavity a non-magnetic stellite layer.
Described mould is characterized in that both ends horizontal section (a) thickness of described stellite layer is 3-4mm, and both sides are 1-2mm near the thickness at both ends horizontal section place (b), and middle top end (c) thickness is 2-3mm.
Described mould is characterized in that both ends horizontal section (a) thickness of described stellite layer is 3mm, and both sides are 1mm near the thickness at both ends horizontal section place (b), and middle top end (c) thickness is 2mm.
Use face radian and the area of super large inner arc central angle permanent-magnet ferrite tile-shaped magnet of the present utility model in electric motor of automobile is bigger, magnetic flux is bigger, improved the power of motor, be used to make the mould of this magnet, simple in structure, product percent of pass significantly improves, and the inner arc central angle can be brought up to more than 90% greater than the qualification rate of the tile-shaped magnet of 150o.
Description of drawings
Fig. 1 is the schematic diagram of the utility model permanent-magnet ferrite tile-shaped magnet;
Fig. 2 is the mould schematic diagram of the utility model permanent-magnet ferrite tile-shaped magnet;
Among the figure, 1-magnet; 2-die cavity wall; 3-counterdie; 4-stellite layer; 5-die cavity.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 1, the inner arc central angle of a kind of permanent-magnet ferrite tile-shaped magnet 1 of the present utility model is 158o, as shown in Figure 2, the mould of making this permanent-magnet ferrite tile-shaped magnet 1 comprises die cavity 5, die cavity wall 2 and counterdie 3, the size of die cavity 5 moulding sections is consistent with the permanent-magnet ferrite tile-shaped magnet 1 of inner arc central angle 158o, counterdie 3 is made by tool steel, between counterdie 3 and die cavity 5, be provided with a non-magnetic stellite layer 4, the hardness of this stellite layer 4 reaches the requirement with the base tool steel, both ends horizontal section (a) thickness of this stellite layer 4 is 3mm, both sides are 1mm near the thickness at both ends horizontal section place (b), and middle top end (c) thickness is 2mm.When specifically making magnet, choose suitable permanent-magnet ferrite molding mass at first as requested, on this mould, suppress green compact with 125 tons of automatically feed hydraulic presses, alignment magnetic field during moulding is radial oriented to outer arc along the green compact inner arc, alignment magnetic field is greater than 640kA/m, and briquetting pressure is looked green density and reached 3.2g/cm
3, these green compact are incubated 2 hour about 1200 ℃ through electrical kiln and sinter compactness magnet in air, and a watt shape grinding machine reaches size tolerance requirements through four merit positions, and the qualification rate that obtains product is 92%.
Claims (5)
1. permanent-magnet ferrite tile-shaped magnet, the inner arc central angle that it is characterized in that described magnet (1) is 150o-180o.
2. the described magnet of claim 1, the inner arc central angle that it is characterized in that described magnet (1) is 158o.
3. make the mould of magnet as claimed in claim 1 or 2 for one kind, comprise die cavity (5), die cavity wall (2) and following (3), it is characterized in that between counterdie (3) and die cavity (5), being provided with a non-magnetic stellite layer (4).
4. mould as claimed in claim 3 is characterized in that both ends horizontal section (a) thickness of described stellite layer (4) is 3-4mm, and both sides are 1-2mm near the thickness at both ends horizontal section place (b), and middle top end (c) thickness is 2-3mm.
5. mould as claimed in claim 3 is characterized in that both ends horizontal section (a) thickness of described stellite layer (4) is 3mm, and both sides are 1mm near the thickness at both ends horizontal section place (b), and middle top end (c) thickness is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200976237U CN201975197U (en) | 2011-04-06 | 2011-04-06 | Tile-shaped permanent ferrite magnet and die thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200976237U CN201975197U (en) | 2011-04-06 | 2011-04-06 | Tile-shaped permanent ferrite magnet and die thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201975197U true CN201975197U (en) | 2011-09-14 |
Family
ID=44580295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200976237U Expired - Lifetime CN201975197U (en) | 2011-04-06 | 2011-04-06 | Tile-shaped permanent ferrite magnet and die thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201975197U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990769A (en) * | 2012-12-17 | 2013-03-27 | 南通万宝实业有限公司 | Mould for eliminating fishhook flaws of tile-shaped permanent magnetic ferrite and manufacture method of mould |
| CN107579628A (en) * | 2017-08-30 | 2018-01-12 | 浙江凯文磁钢有限公司 | A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet |
-
2011
- 2011-04-06 CN CN2011200976237U patent/CN201975197U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990769A (en) * | 2012-12-17 | 2013-03-27 | 南通万宝实业有限公司 | Mould for eliminating fishhook flaws of tile-shaped permanent magnetic ferrite and manufacture method of mould |
| CN107579628A (en) * | 2017-08-30 | 2018-01-12 | 浙江凯文磁钢有限公司 | A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |
|
| CX01 | Expiry of patent term |