CN1059422A - Make the process of permanent-magnetic oxyferrite magnetic ring - Google Patents
Make the process of permanent-magnetic oxyferrite magnetic ring Download PDFInfo
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- CN1059422A CN1059422A CN 90105635 CN90105635A CN1059422A CN 1059422 A CN1059422 A CN 1059422A CN 90105635 CN90105635 CN 90105635 CN 90105635 A CN90105635 A CN 90105635A CN 1059422 A CN1059422 A CN 1059422A
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- magnetic field
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention is a kind of new process of making the small-sized magnet ring of anisotropy permanent-magnet ferrite, and its key is to utilize magnet steel to produce magnetic field, suppresses ring blank in this magnetic field.Magnetic field intensity is about 5000 oersteds, and the magnetic line of force is perpendicular to the axis of magnet ring.
With the small-sized magnet ring of this kind method production anisotropy, than the big magnetic patch cutting of traditional usefulness, the method for boring is great improvement, and production efficiency improves greatly, and equipment cost, product cost all greatly reduce.
Description
The present invention is a kind of new process of making the small-sized magnet ring of anisotropy permanent-magnet ferrite, and its task is with the p-m rotor magnet ring of this process manufacturing as quartz clock stepping motor.
The quartz clock stepping motor of Chu Shouing anisotropy magnet ring all is to make with following complex techniques process in the market; Promptly at first in magnetic field, be pressed into block blank with ferrite powder, through high temperature (about 1240 ℃) sintering, the rectangular magnet in the side of being cut into again, the rectangular growth pole that grinds in general side, pole is cut into short cylindrical,, forms a small circle ring again through laser or ultrasonic drilling, through magnetize (generally perpendicular to axial direction), be finished product again.
The present invention adopts the straight forming technology, promptly the ferrite powder for preparing is packed in the special mould, and be pressed into ring-like blank in the magnetic field that magnet steel produces, again through 1240 ℃ of sintering, during moulding, magnetic field intensity is about 5000 oersteds, and the magnetic line of force is perpendicular to the axis of toroidal magnet.Key of the present invention has been to avoid traditional method with dc coil generation magnetic field, and adopts the magnet steel of particular design to produce magnetic field, the small-sized magnet ring of compacting anisotropy in this magnetic field.After taking this measure, the Magnetic Field Design that is run into traditional method compacting microminiature magnet ring time the, a series of difficulties in the mold design are just met cutter and have been separated.
An example of the present invention:
Figure 1 shows that the anisotropy permanent-magnetic oxyferrite magnetic ring, external diameter (1) 5.5mm, internal diameter (2) 2mm, high (3) 4.2mm, perpendicular to axial direction magnetizing, surperficial magnetic is close to be 700～800GS, is used for the p-m rotor of quartz clock stepping motor.
The present invention, simple and easy to do, one-shot forming, not only machining period reduction, and also equipment investment reduces greatly, is easy to produce in enormous quantities, and cost is low, and high efficiency is convenient to promote.
Claims (3)
1, a kind of process of making the small-sized magnet ring of anisotropy permanent-magnet ferrite the method is characterized in that and utilizes magnet steel to produce magnetic field, rather than produces magnetic field with dc coil.
2, according to the said process of claim 1, its magnetic field intensity is about 5000 oersteds.
3, according to claim 1,2 said processes, magnetic field magnetic line is perpendicular to the axis of magnet ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105635 CN1059422A (en) | 1990-03-29 | 1990-03-29 | Make the process of permanent-magnetic oxyferrite magnetic ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105635 CN1059422A (en) | 1990-03-29 | 1990-03-29 | Make the process of permanent-magnetic oxyferrite magnetic ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1059422A true CN1059422A (en) | 1992-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90105635 Pending CN1059422A (en) | 1990-03-29 | 1990-03-29 | Make the process of permanent-magnetic oxyferrite magnetic ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303929B (en) * | 2002-08-29 | 2011-04-27 | 信越化学工业株式会社 | Radial anisotropic ring-shaped magnet |
| CN101106007B (en) * | 2007-06-08 | 2011-06-15 | 李根先 | Motorbicycle automobile mileage table magnet steel and its manufacture method |
-
1990
- 1990-03-29 CN CN 90105635 patent/CN1059422A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303929B (en) * | 2002-08-29 | 2011-04-27 | 信越化学工业株式会社 | Radial anisotropic ring-shaped magnet |
| CN101106007B (en) * | 2007-06-08 | 2011-06-15 | 李根先 | Motorbicycle automobile mileage table magnet steel and its manufacture method |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |