CN1033543A - Quasi-isostatic pressure method for pressing nd-fe-b magnet - Google Patents
Quasi-isostatic pressure method for pressing nd-fe-b magnet Download PDFInfo
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- CN1033543A CN1033543A CN 87107829 CN87107829A CN1033543A CN 1033543 A CN1033543 A CN 1033543A CN 87107829 CN87107829 CN 87107829 CN 87107829 A CN87107829 A CN 87107829A CN 1033543 A CN1033543 A CN 1033543A
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- magnetic
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Abstract
The invention belongs to powder compaction technology.
It is simple that quasi-iso static pressing of the present invention prepares the Nd-Fe-B method, easy operating, the magnetic patch blank of common compression moulding is put into rubber finger sleeve, in being placed with the pressure vessel of liquid medium, it is promptly plastic to add once pressure on common press, thereby reach the density uniformity, the uniformity of the magnetic property of gained magnet improves greatly behind the sintering.
Description
The invention belongs to the process of pressing Nd-Fe-B magnet.
The pressing Nd-Fe-B magnet magnetic generally is that magnetic is put into compression moulding under the mould interior magnetic field at present, adopt single face to press during compacting magnetic base, thereby pressed compact top and the bottom density unevenness is even, influence the magnetic property of magnet itself widely, list of references: (1) Nd-Fe base novel permanent magnetic material M.Sagawa, S.Fujimura, M.Togawa, H.Yamamots and Y.Matsuura " third generation rare earth permanent magnet " Luo Yang edits 1987.P23, (2) rich mishmetal-iron-boron sintered permanent magnet M.Okada, S.Sugimoto, C.Ishzaka, T.Tanaka, M.Homma " third generation rare earth permanent magnet " Luo Yang edits 1987.P28
The present invention because the pressed compact top and the bottom density unevenness that brings during compacting magnetic base is even, causing the bigger shortcoming that differs of magnetic patch top and the bottom magnetic behind the sintering, and provides a kind of accurate static pressure method of pressing Nd-Fe-B magnet magnetic in order to overcome.
The accurate static pressure method of pressing Nd-Fe-B magnet magnetic of the present invention is to put into tool with grinding to the magnetic of 4-5 μ m, in magnetic field with 1000～1500kg/cm
2Pressure once is pressed into the magnetic base, then the magnetic base that has suppressed is put into rubber finger sleeve or rubber sleeve (mould), is placed on seal washer 2 then, puts pressure head 1 on seal washer 2, is placed on the press and suppresses, required pressure 2000～5000kg/cm during compacting
2, liquid medium can be an alcohol, paraffin wax, kerosene, gasoline etc., used pressure vessel are represented in figure one, 1 seaming chuck, 2 diaphragm seals, 3 exocoels, 4 down pressing seat, 5 diaphragm seals, pressure vessel, seaming chuck, down pressing seat are all made by No. 45 high strength steels more than the steel, and the external diameter of pressure vessel is not less than 3 with the internal diameter ratio, and through stress-relieving by beat treatment, the not little 20mm of the height of down pressing seat, diaphragm seal 2 and 5 are δ 5mm oil resistant rubbers.
Advantage of the present invention: pressure vessel processing is simple, easy to use, do not need expensive isostatic pressing machine and Standard Factory Room, be placed on the common press and can carry out, thereby cheap, easy to utilize, the pseudo isostatic pressing method easy operating, the rate of finished products height, and the magnetic patch consistent in density that suppresses with this method and the uniformity of magnetic patch magnetic property are improved.
Embodiment one
Pressure vessel (3), seaming chuck (1) and down pressing seat (4) all are with the processing of 70CrMoVWAl steel, pressure vessel (3) external diameter φ 100mm, internal diameter φ 30mm, high 100mm, and through strict heat treatment, eliminate stress, gasket seal (2), (5) adopt δ 5mm oil resistant rubber, liquid medium is a paraffin wax, puts into rubber finger sleeve giving the magnetic base that presses earlier, down pressing seat 4 is placed on the bottom of pressure vessel, put seal washer 2 again well, and paraffin wax puts into container, then the rubber finger sleeve that the magnetic base is housed is placed on the seal washer 2, on rubber finger sleeve, put seal washer 5 and seaming chuck 1 again, the pressure vessel that has been equipped with is placed on the YA-125T press uses 2000kg/cm
2Pressure is once suppressed success, can obtain the density uniformity, the uniform magnet of the magnetic property behind the sintering.
Embodiment two
Pressure vessel (3), seaming chuck (1) and down pressing seat (4) all adopt 45CrNiMoV processing, pressure vessel (3) external diameter φ 100mm, internal diameter φ 30mm, high 120mm, and through strict heat treatment, eliminate stress, seal washer (2), (5) adopt δ 5mm oil resistant rubber, liquid medium adopts alcohol, down pressing seat (4), diaphragm seal (5) is put into the pressure vessel bottom, puts into alcohol again at pressure vessel, put into the rubber finger sleeve that the magnetic base is housed then, then put into diaphragm seal (2) and seaming chuck (1), the pressure vessel that installs is placed on the YA-125T press is last to be suppressed successfully, pressure is 5000kg/cm2, the magnetic patch density of gained is uniformity everywhere, and the magnetic patch magnetic property is even behind the sintering.
Claims (4)
1, a kind of pressure vessel (3) that adopts metal to manufacture, and liquid medium is housed in container, be pressed the magnetic base and put into the method for the accurate static pressure pressing Nd-Fe-B magnet magnetic of rubber finger sleeve, it is characterized in that: be placed with down pressing seat (4) in the pressure vessel, seaming chuck (1) and gasket seal (2), the two-sided magnetic patch of once suppressing of (5).
2, a kind ofly suppress each Nd-Fe-B magnetic method by the described accurate static pressure of claim 1, it is characterized in that: liquid medium is paraffin wax, alcohol, kerosene, gasoline.
3, a kind of by the described accurate static pressure pressing Nd-Fe-B magnet magnetic method of claim 1, it is characterized in that: metal pressure container (3) is by the 70CrMoVWAl steel, can be that the 45CrNiMoV steel is made.
4, a kind of method by the described accurate static pressure pressing Nd-Fe-B magnet magnetic of claim 1, it is characterized in that: gasket seal is that δ 5mm oil resistant rubber is done.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107829 CN1033543A (en) | 1987-12-16 | 1987-12-16 | Quasi-isostatic pressure method for pressing nd-fe-b magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107829 CN1033543A (en) | 1987-12-16 | 1987-12-16 | Quasi-isostatic pressure method for pressing nd-fe-b magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1033543A true CN1033543A (en) | 1989-06-28 |
Family
ID=4816257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87107829 Pending CN1033543A (en) | 1987-12-16 | 1987-12-16 | Quasi-isostatic pressure method for pressing nd-fe-b magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033543A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054458C (en) * | 1990-11-30 | 2000-07-12 | 因太金属株式会社 | Method and apparatus for producing permanent magnet, as well as rubber mold used for shaping under magnetic field |
| CN1061580C (en) * | 1997-02-04 | 2001-02-07 | 冶金工业部钢铁研究总院 | Method for making sintered alloy balls |
| CN100389913C (en) * | 2005-12-23 | 2008-05-28 | 上海大学 | Method for forming nano crystal neodymium iron boron binding magnet |
-
1987
- 1987-12-16 CN CN 87107829 patent/CN1033543A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054458C (en) * | 1990-11-30 | 2000-07-12 | 因太金属株式会社 | Method and apparatus for producing permanent magnet, as well as rubber mold used for shaping under magnetic field |
| CN1061580C (en) * | 1997-02-04 | 2001-02-07 | 冶金工业部钢铁研究总院 | Method for making sintered alloy balls |
| CN100389913C (en) * | 2005-12-23 | 2008-05-28 | 上海大学 | Method for forming nano crystal neodymium iron boron binding magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |