CN106077635A - A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation and the manufacture method of permanent magnet material - Google Patents
A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation and the manufacture method of permanent magnet material Download PDFInfo
- Publication number
- CN106077635A CN106077635A CN201610519375.8A CN201610519375A CN106077635A CN 106077635 A CN106077635 A CN 106077635A CN 201610519375 A CN201610519375 A CN 201610519375A CN 106077635 A CN106077635 A CN 106077635A
- Authority
- CN
- China
- Prior art keywords
- mould
- magnetic field
- raw material
- permanent magnet
- orientation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/087—Compacting only using high energy impulses, e.g. magnetic field impulses
Abstract
The invention discloses a kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation, it includes seaming chuck (1), lower push rod (4), mould (2) and pulsed coil (3), described seaming chuck (1) lower section is provided with mould (2), mould (2) is externally provided with its pulsed coil (3) of parcel, is provided with lower push rod (4) in mould (2)；It further disclose the manufacture method of permanent magnet material.The invention has the beneficial effects as follows: material loss is few, device fabrication is simple, low cost, and higher magnetic field intensity orientation coefficient can be obtained, the most also improve the qualification rate of transverse field unevenness.
Description
Technical field
The present invention relates to the technical field of permanent magnetism permanent magnet material, particularly a kind of raising rare earth permanent-magnetic material pressing under magnetic field takes
To equipment and the manufacture method of permanent magnet material of degree.
Background technology
Pressing under magnetic field rare earth permanent-magnetic material, mainly by oriented electromagnetic ferrum and magnet exciting coil, alignment magnetic field in early days is strong
Degree is about 1.8T (relevant with anode-cathode distance), and with the increase of magnet HCJ, required alignment magnetic field also increases to
About 2.5T, the most more increases to more than 3T, in order to obtain higher alignment magnetic field, it is necessary to increase electric magnet volume, expands molding
The work space of press, thus increase considerably overall dimensions and the manufacturing cost of moulding press.
Owing to when making high-performance rare-earth permanent-magnetic, the magnetic field that electric magnet produces is not high enough, is extremely difficult to technological requirement, institute
To need a kind of new method.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of material loss is few, device fabrication simple, one-tenth
This is the lowest, and can obtain the equipment and forever of the raising rare earth permanent-magnetic material pressing under magnetic field degree of orientation of higher magnetic field intensity orientation coefficient
The manufacture method of magnetic material.
The purpose of the present invention is achieved through the following technical solutions: a kind of raising rare earth permanent-magnetic material pressing under magnetic field degree of orientation
Equipment, it includes seaming chuck, lower push rod, mould and pulsed coil, is provided with mould below described seaming chuck, and mould is externally provided with
Wrap up its pulsed coil, in mould, be provided with lower push rod.
The described face that seaming chuck lower surface is level.
In addition to lower push rod, cavity is also left in described mould.
The method of described equipment making permanent magnet material, it comprises the following steps:
S1, sub-material, input nitrogen in hopper, detect oxygen content, after oxygen content reaches 1000ppm value, use electronic scale
Or balance weighs the raw material in distribution box, the raw material after weighing loads in pouch, and after sub-material, the pouch that will be equipped with raw material is put
Enter in sack, and it is stand-by that sack is tightened bag mouth；
S2, magnetize, blank molding, fill in the cavity in mould and add nitrogen, and detect oxygen content, oxygen content reaches 300ppm
～after 1000ppm value, will be equipped with in the whole cavity putting into mould of pouch of raw material, it is energized in pulsed coil, makes pouch
In raw material positive and negative magnetize four times, detect magnetic field simultaneously, carry out when magnetic field reaches the highest suppressing, demagnetizing, blank is compressing
The rear demoulding.
S3, green compact molding, respectively double-bag green compact plastic sheeting and the scattered paper of first pressing, reinstall vacuum high-temperature plastic packaging bag
In, with Vacuum Package, the green compact after plastic packaging, put into cold isostatic press and carry out isostatic cool pressing system；
Green compact, after isostatic pressed, are peeled off plastic sheeting and scattered paper by S4, sintering, and the green compact after stripping are fitly put into burning
Knot box, is sintered in being sent to sintering furnace, finally obtains product.
Described raw material includes magnetic powder, binding agent, vulcanizing agent and processing aid.
In described pulsed coil, directional magnetic field should ensure that >=3200KA/m.
Described raw material is when pushing down molding, and pressure size determines according to green density, size and the mould of product.
The invention have the advantages that the present invention is by arranging pulsed coil so that pulse alignment magnetic field field intensity is identical
Anode-cathode distance under, magnetic field intensity be more than 4T, with pulse alignment magnetic field substitute electric magnet magnetic field, be conducive to improve product orientation
Degree, closely improves the maximum magnetic energy product of product and intrinsic demagnetization curve rectangularity, and material loss is few, device fabrication simple,
Low cost, the most also improves transverse field unevenness qualification rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of present device；
In figure, 1-seaming chuck, 2-mould, 3-pulsed coil, 4-lower push rod, 5-inner chamber.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings, and protection scope of the present invention is not limited to the following stated:
As it is shown in figure 1, a kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation, it includes seaming chuck 1, Xia Ding
Bar 4, mould 2 and pulsed coil 3, be provided with mould 2 below described seaming chuck 1, mould 2 is externally provided with its pulsed coil 3 of parcel,
Being provided with lower push rod 4 in mould 2, whole device is the simplest.Wherein, pulse current can be produced after pulsed coil 2 energising, thus produce
Give birth to pulsed magnetic field, and this pulsed magnetic field is that tool is directive, also referred to as pulse alignment magnetic field, pulse alignment magnetic field energy
Reach 4～10T, therefore there is higher magnetic field orientating coefficient, this high magnetic field orientating coefficient can be effectively improved magnetic energy product and
Material homogeneity, is favorably improved the qualification rate of transverse field unevenness.
As it is shown in figure 1, seaming chuck 1 lower surface is the face of level.
As it is shown in figure 1, also leave cavity 5 in addition to lower push rod 4 in mould 2.
The method of equipment making permanent magnet material, it is characterised in that: it comprises the following steps:
S1, sub-material, input nitrogen in hopper, detect oxygen content, after oxygen content reaches 1000ppm value, use electronic scale
Or balance weighs the raw material in distribution box, the raw material after weighing loads in pouch, and after sub-material, the pouch that will be equipped with raw material is put
Enter in sack, and it is stand-by that sack is tightened bag mouth；
S2, magnetize, blank molding, fill in the cavity 5 in mould 2 and add nitrogen, and detect oxygen content, oxygen content reaches
After 300ppm～1000ppm value, will be equipped with in the whole cavity 5 putting into mould 2 of pouch of raw material, logical in pulsed coil 3
Electricity, makes that the raw material in pouch is positive and negative to magnetize four times, detects magnetic field simultaneously, carries out when magnetic field reaches the highest suppressing, demagnetizing, blank
The compressing rear demoulding.
S3, green compact molding, respectively double-bag green compact plastic sheeting and the scattered paper of first pressing, reinstall vacuum high-temperature plastic packaging bag
In, with Vacuum Package, the green compact after plastic packaging, put into cold isostatic press and carry out isostatic cool pressing system；
Green compact, after isostatic pressed, are peeled off plastic sheeting and scattered paper by S4, sintering, and the green compact after stripping are fitly put into burning
Knot box, is sintered in being sent to sintering furnace, finally obtains product.
Raw material includes magnetic powder, binding agent, vulcanizing agent and processing aid.
In pulsed coil 3, directional magnetic field should ensure that >=3200KA/m.
Raw material is when pushing down molding, and pressure size determines according to green density, size and the mould of product.
The pressing process of whole permanent magnet material is all carried out under totally-enclosed and nitrogen are protected, and operates for hypoxia, it is to avoid
The oxidation of raw material, affects product quality.
Other conditions are constant, and the permanent magnet material made under several groups of different magnetic field intensity measures, measurement result such as table 1
Shown in, table 1 be fine and close density and the contrast table of the degree of orientation of alignment magnetic field and product.
Table 1:
From table 1 it follows that alignment magnetic field is the biggest, the relative density of permanent magnet material is the biggest, and fine and close density is the biggest,
The sintered magnet degree of orientation is the biggest, and the better quality of permanent magnet material after isostatic pressed, and then demonstrates this method
Feasibility.
Claims (8)
1. the equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation, it is characterised in that: it include seaming chuck (1), under
Push rod (4), mould (2) and pulsed coil (3), described seaming chuck (1) lower section is provided with mould (2), and mould (2) is externally provided with parcel
Its pulsed coil (3), is provided with lower push rod (4) in mould (2).
A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation the most according to claim 1, it is characterised in that:
Described seaming chuck (1) lower surface is the face of level.
A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation the most according to claim 1, it is characterised in that:
In addition to lower push rod (4), cavity (5) is also left in described mould (2).
4. according to the method for the equipment making permanent magnet material described in any one in claim 1 ~ 3, it is characterised in that: it includes
Following steps:
S1, sub-material, input nitrogen in hopper, detect oxygen content, after oxygen content reaches 1000ppm value, with electronic scale or sky
Putting down and weigh the raw material in distribution box, the raw material after weighing loads in pouch, and after sub-material, the pouch that will be equipped with raw material is put into greatly
In Dai, and it is stand-by that sack is tightened bag mouth；
S2, magnetize, blank molding, fill in the cavity (5) in mould (2) and add nitrogen, and detect oxygen content, oxygen content reaches
After 300ppm～1000ppm value, will be equipped with in the whole cavity (5) putting into mould (2) of pouch of raw material, toward pulsed coil
(3) in, energising, makes that the raw material in pouch is positive and negative to magnetize four times, detects magnetic field simultaneously, carries out when magnetic field reaches the highest suppressing, moving back
Magnetic, the compressing rear demoulding of blank.
5.S3, green compact molding, respectively double-bag green compact plastic sheeting and the scattered paper of first pressing, reinstall vacuum high-temperature plastic packaging bag
In, with Vacuum Package, the green compact after plastic packaging, put into cold isostatic press and carry out isostatic cool pressing system；
Green compact, after isostatic pressed, are peeled off plastic sheeting and scattered paper by S4, sintering, and the green compact after stripping are fitly put into sintering box,
It is sintered in being sent to sintering furnace, finally obtains product.
The manufacture method of permanent magnet material the most according to claim 4, it is characterised in that: described raw material includes magnetic powder, glues
Knot agent, vulcanizing agent and processing aid.
The manufacture method of permanent magnet material the most according to claim 4, it is characterised in that: fixed in described pulsed coil (3)
>=3200KA/m is should ensure that to magnetic field.
The manufacture method of permanent magnet material the most according to claim 4, it is characterised in that: described raw material when pushing down molding,
Pressure size determines according to green density, size and the mould of product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519375.8A CN106077635A (en) | 2016-06-30 | 2016-06-30 | A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation and the manufacture method of permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519375.8A CN106077635A (en) | 2016-06-30 | 2016-06-30 | A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation and the manufacture method of permanent magnet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106077635A true CN106077635A (en) | 2016-11-09 |
Family
ID=57212909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610519375.8A Pending CN106077635A (en) | 2016-06-30 | 2016-06-30 | A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation and the manufacture method of permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106077635A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971800A (en) * | 2017-03-17 | 2017-07-21 | 京磁材料科技股份有限公司 | The pressed compact preparation method of Sintered NdFeB magnet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030209842A1 (en) * | 2000-06-29 | 2003-11-13 | Sumitomo Special Metals Co., Ltd. | Method for manufacturing rare earth magnet and powder compacting apparatus |
| CN102364617A (en) * | 2011-11-25 | 2012-02-29 | 中国电子科技集团公司第九研究所 | High-uniformity radial orientation neodymium iron boron permanent magnet ring and method for preparing same |
| CN103128286A (en) * | 2013-03-13 | 2013-06-05 | 黄可可 | Anisotropism sintering rare earth permanent magnetic material radial orientation device and orientation method thereof |
| CN203140772U (en) * | 2013-03-13 | 2013-08-21 | 黄可可 | Anisotropic sintering rare earth permanent magnetic material radial orientation device |
| CN104493158A (en) * | 2014-12-23 | 2015-04-08 | 宁波科田磁业有限公司 | Preparation method and device for decreasing sintered NdFeB declination |
-
2016
- 2016-06-30 CN CN201610519375.8A patent/CN106077635A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030209842A1 (en) * | 2000-06-29 | 2003-11-13 | Sumitomo Special Metals Co., Ltd. | Method for manufacturing rare earth magnet and powder compacting apparatus |
| CN102364617A (en) * | 2011-11-25 | 2012-02-29 | 中国电子科技集团公司第九研究所 | High-uniformity radial orientation neodymium iron boron permanent magnet ring and method for preparing same |
| CN103128286A (en) * | 2013-03-13 | 2013-06-05 | 黄可可 | Anisotropism sintering rare earth permanent magnetic material radial orientation device and orientation method thereof |
| CN203140772U (en) * | 2013-03-13 | 2013-08-21 | 黄可可 | Anisotropic sintering rare earth permanent magnetic material radial orientation device |
| CN104493158A (en) * | 2014-12-23 | 2015-04-08 | 宁波科田磁业有限公司 | Preparation method and device for decreasing sintered NdFeB declination |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971800A (en) * | 2017-03-17 | 2017-07-21 | 京磁材料科技股份有限公司 | The pressed compact preparation method of Sintered NdFeB magnet |
| CN106971800B (en) * | 2017-03-17 | 2019-02-15 | 京磁材料科技股份有限公司 | The green compact preparation method of Sintered NdFeB magnet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6280137B2 (en) | Manufacturing method of rare earth sintered magnet and manufacturing apparatus used in the manufacturing method | |
| CN103990805B (en) | The milling method of a kind of permanent-magnet rare-earth NdFeB alloy and equipment | |
| CN103093921B (en) | A kind of R-T-B-M-C system sintered magnet and manufacture method thereof and special purpose device | |
| CN102498531B (en) | NdFeB sintered magnet production method and production device, and NdFeB sintered magnet produced with said production method | |
| CN100452252C (en) | The method of the orientation profiling of the lanthanide permanent magnet and preparation device for the same | |
| CN103949642B (en) | The continous way compacting tool set of toroidal magnet and drawing method thereof | |
| CN108831657A (en) | A kind of method and dedicated unit improving properties of sintered ndfeb magnets | |
| JPH1055929A (en) | R-fe-b radially anisotropic sintered magnet and manufacture thereof | |
| CN103996517B (en) | A kind of semi-automatic forming method of Nd-Fe-B rare earth permanent magnetic material | |
| JP2021097224A (en) | DEVICE AND METHOD FOR MANUFACTURING RADIATION-ORIENTED SINTERED ARC-SHAPED Nd-Fe-B MAGNET, AND RADIATION-ORIENTED SINTERED ARC-SHAPED Nd-Fe-B MAGNET MANUFACTURED BY THE DEVICE OR METHOD | |
| CN106077635A (en) | A kind of equipment improving the rare earth permanent-magnetic material pressing under magnetic field degree of orientation and the manufacture method of permanent magnet material | |
| CN101178962B (en) | Non-pressure preparation method of rare-earth-iron-boron sintered magnetic material | |
| CN102766835A (en) | Method for preparing high performance SmCo permanent magnet material | |
| CN105261474A (en) | Method for recycling samarium-cobalt permanent magnet material waste | |
| CN202336578U (en) | Oxygen-free molding and sintering device | |
| CN205057057U (en) | Full automatic molding press of neodymium iron boron tombarthite permanent magnetism | |
| CN101867267B (en) | Technology for manufacturing neodymium iron boron (NdFeB) magnetic tile used for radial oriented motor and moulding mould thereof | |
| CN203817380U (en) | NdFeB production line | |
| CN110997950B (en) | Continuous heat treatment device and method for alloy workpiece or metal workpiece | |
| CN103268798B (en) | The preparation method of the sintered Nd-Fe-B permanent magnetic material that carbon-dioxide protecting is shaping | |
| CN108987020B (en) | Method for reducing surface magnetic difference of two surfaces of sintered neodymium iron boron magnet cutting black sheet | |
| CN115780807A (en) | Full-automatic magnet integrated forming device and method using one-way mover | |
| CN210259439U (en) | Neodymium iron boron dry pressing shaping block body vacuum storage bag | |
| CN201132216Y (en) | Compacting tool set for preforming big square type Nd-Fe-B material | |
| CN108568520A (en) | A kind of oriented moulding mold of anisotropic neodymium iron boron magnetic body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |
|
| RJ01 | Rejection of invention patent application after publication |