CN106486280A - A kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring and method - Google Patents
A kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring and method Download PDFInfo
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- CN106486280A CN106486280A CN201610884533.XA CN201610884533A CN106486280A CN 106486280 A CN106486280 A CN 106486280A CN 201610884533 A CN201610884533 A CN 201610884533A CN 106486280 A CN106486280 A CN 106486280A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0576—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together pressed, e.g. hot working
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- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring，Including frame，And the lower end of frame is provided with lower water-cooled push rod，The upper end of the frame is provided with pressure ring Pneumatic assembly，And the upper end of frame is provided with water-cooled push rod，The outer end of the lower water-cooled push rod is socketed with water-cooling subbase，And the upper end of water-cooling subbase is provided with concentric mould bases bracket，It is socketed by mould bases gland between the mould bases bracket and water-cooling subbase，And the upper end grafting of mould bases bracket is provided with mould bases，It is an advantage of the current invention that preparation process is only through being hot pressed into magnetic pole、Forward extrusion becomes cup-shaped magnet twice molding procedure，And magnet magnet top during forward extrusion provides certain buffer brake all the time and is smoothly molded with guaranteeing workpiece，Ratio of briquetting and the production efficiency of magnet ring are so considerably improved，Solid foundation is established for anisotropy magnetic Nd-Fe-B ring newly net forming technique commercial application.
Description
Technical field
The present invention relates to rare-earth permanent-magnet material technical field, specially a kind of newly net forming of anisotropy Ru-Fe-Mn magnet ring
Processing unit (plant) and method.
Background technology
High density anisotropy magnet prepared by hot pressing/thermal deformation technique, is an important branch of Rare-earth Permanent Magnet Industry.
As hot-pressed magnets overcome the restriction of sintering magnet ring preparation technology from source, the magnetic of complete high length-diameter ratio can be prepared
Ring, and with flow process short, promote motor lightweight the features such as, be a kind of newly net forming technology of preparing of great development prospect.
Obtained in automobile EPS motor, brushless electric machine, voice coil motor, air-conditioning ipm motor using the high-performance magnet ring prepared by the technology
Increasingly it is widely applied.
Hot pressing/thermal deformation method was applied in the preparation of permanent magnet in the later stage eighties 20th century, but due at that time
Level is limited, and is not widely popularized, in recent years, as the method is opened for research anisotropy two-phase compound nano crystal permanent magnetic material
The new approach warded off and cause concern again.Dresden, Germany IFW research institute D.Hinz in 2003 et al. (Near net
shape production of radially oriented NdFeB ring magnets by backward
extrusion,J.of Materials Processing Technology,2003,135：358-365.) disclose to report and adopt
Having been prepared with the mode of backward extrusion can be with the thin-walled anisotropy magnet ring of excellent homogeneity with excellent magnetic.2014, should
Institute I.Dirba et al. (Net-shape and crack-free production of Nd-Fe-B magnets by hot
deformation,J.Alloy and compounds,2014,589：Hot pressing/thermal deformation neodymium-iron-boron 301-306.) is described
The newly net forming technique of ring, by applying the additional reaction of 0-0.8Mpa at magnet top during neodymium iron boron magnetic body backward extrusion
Pressure obtains flawless thin-walled magnetic Nd-Fe-B ring.They are at the technical process of open report, first by NdFeB magnetic powder hot pressing
Become magnet ring, then magnet ring backward extrusion is become thin-walled cup-shaped magnet, finally bottom is removed and obtain complete near-net-shape magnet ring.2011
Li Wei et al. (the thermal deformation mechanism of anisotropy hot pressing rare-earth permanent magnet and micro- magnetic structure research, Chinese engineering science, 2011,
13(10):Anisotropic neodymium iron boron magnetic body heat pressing process 4-12.) is reported, has inquired into the thermal deformation mechanism of hot-pressed magnets and micro-
Architectural feature is seen, and discloses the vacuum hot pressing device of its independent research.Chinese invention patent CN103123862A discloses one
The method for improving the radially oriented Nd-Fe-B permanent magnetic ring performance of hot pressing/thermal deformation and its axial uniformity is planted, will using heat pressing process
Rapidly quenched magnetic powder with nanocrystalline structure or HDDR magnetic are pressed into isotropic magnet, Ran Houjin in vacuum induction hot press
Row thermal deformation obtains anisotropy nanocrystalline magnet, is finally prepared into radially oriented permanent-magnetic clamp using backward extrusion technology.The patent
By adding the middle process of predeformation during hot pressing and backward extrusion so that the blank of backward extrusion is anisotropic heat
Deformation blank, thus reaches the purpose for improving magnet ring magnet ring uniformity and magnetic property.In order to obtain the magnet ring of excellent properties, and carry
High efficiency, it is necessary to easily ftracture during solving magnet backward extrusion, and the problems such as each position magnetic property of magnet ring is uneven.
Content of the invention
It is an object of the invention to provide a kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring and method, with
Solve the problems, such as to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring, including frame, and the lower end of frame is provided with
Lower water-cooled push rod, the upper end of the frame are provided with pressure ring Pneumatic assembly, and the upper end of frame is provided with water-cooled push rod, described
The outer end of lower water-cooled push rod is socketed with water-cooling subbase, and the upper end of water-cooling subbase is provided with concentric mould bases bracket, the mould bases
It is socketed by mould bases gland between bracket and water-cooling subbase, and the upper end grafting of mould bases bracket is provided with mould bases, the mould bases
Upper end is provided with die holder, and the upper end of die holder is provided with die by mould gland, and the rear end of the die is connected with vavuum pump,
And the outer end of pressure ring is coordinated with die sealing, the lower end of the die holder is provided with induction coil, and die and is socketed with pressure ring, institute
The lower end for stating water-cooled push rod is socketed with pressure ring frame, and the lower end of the pressure ring frame is connected with pressure ring by pressure ring spacer shell, described
The upper end of pressure ring frame is hinged with pressure ring seat, and the push rod of the upper end connection pressure ring Pneumatic assembly of pressure ring seat.
Its processing method is comprised the following steps：
S1：Prepare magnet：Nd-Fe-B rapidly quenched magnetic powder is loaded in hot pressing die, is heated in vacuum induction hot pressing furnace
650-750 DEG C, prepare the isotropism hot pressing neodymium iron boron magnetic body for being close to 7.2-7.3g/cm3 density value；
S2：Place magnet：The neodymium iron boron magnetic body for obtaining is placed in die, upper extruding punch is moved to pressure ring to be made
, just at sealing, now pressure ring Pneumatic assembly is in packing state for pressure ring and die；
S3：Pour protective gas：Enter middle row to the whole cavity between die and pressure ring to vacuumize, when digital display vacuum is measured
The vacuum obtained in cavity reaches 5.5 × 10-3During pa, intake valve is opened to applying argon gas in cavity, until vacuum is shown as
0.03-0.04Mpa；
S4：Hot pressing：Medium frequency induction power supply is opened, mould and material is heated, when neodymium iron boron magnetic body reaches 700-850
DEG C when, insulation promote to 20 minutes, subsequently within 5 minutes lower extruding punch by material with certain extruding rate upwardly, material
Flow direction and the lower extruding punch direction of motion are conversely, 1.5-3.5mm gap between upper extruding punch and lower extruding punch
In flow up, formed thin-walled cup-shaped magnet；
S5：Ejection：Stop heating until cup-shaped magnet cooled and solidified, using pressure ring Pneumatic assembly by upper extruding punch and pressure
Pull out on ring, then drive pusher set that the neodymium iron boron magnetic body for being obtained is ejected die using lower extruding punch.
Compared with prior art, the invention has the beneficial effects as follows：The present invention compared with prior art, patent of the present invention excellent
Point is that preparation process only becomes cup-shaped magnet twice molding procedure through being hot pressed into magnetic pole, forward extrusion, and magnet is in forward extrusion
During magnet top certain buffer brake be provided all the time smoothly be molded with guaranteeing workpiece, be so considerably improved the shaping of magnet ring
Rate and production efficiency, are that anisotropy magnetic Nd-Fe-B ring newly net forming technique commercial application establishes solid foundation.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the partial schematic diagram of present configuration；
Fig. 3 is the technological process of the present invention；
Fig. 4 is profiled member pictorial diagram.
In figure：Water-cooled push rod on 1,2 pressure ring Pneumatic assemblies, 3 pressure ring seats, 4 pressure ring framves, 5 upper ejector pins, 6 pressure ring spacer shells, 7
Upper extruding punch, 8 pressure rings, 9 profiled members, 10 dies, 11 mould glands, 12 die holders, 13 times extruding punch, 14 induction coils, 15
Pusher set, 16 lower push rods, 17 mould bases, 18 mould bases brackets, 19 mould bases glands, 20 water-cooling subbases, 21 times water-cooled push rods.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1-4 are referred to, the present invention provides a kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring and method
Technical scheme：
Implement row 1
A kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring, it is characterised in that：Including frame 22, and frame
22 lower end is provided with lower water-cooled push rod 21, and the upper end of frame 22 is provided with pressure ring Pneumatic assembly 2, and the upper end of frame 22 is installed
The outer end for having upper water-cooled push rod 1, lower water-cooled push rod 21 is socketed with water-cooling subbase 20, and the upper end of water-cooling subbase 20 is provided with one heart
Mould bases bracket 18, be socketed by mould bases gland 19 between mould bases bracket 18 and water-cooling subbase 20, and the upper end of mould bases bracket 18
Grafting is provided with mould bases 17, and the upper end of mould bases 17 is provided with die holder 12, and the upper end of die holder 12 is provided with by mould gland 11
Die 10, the rear end of die 10 are connected with vavuum pump, and the outer end of pressure ring 8 is coordinated with the sealing of die 10, the lower end peace of die holder 12
Equipped with induction coil 14, and pressure ring 8 is socketed with die 10, the lower end of upper water-cooled push rod 1 is socketed with pressure ring frame 4, pressure ring frame 4
Lower end is connected with pressure ring 8 by pressure ring spacer shell 6, and the upper end of pressure ring frame 4 is hinged with pressure ring seat 3, and the upper end connection of pressure ring seat 3
The push rod of pressure ring Pneumatic assembly 2.
Its preparation process is comprised the following steps：
S1：Prepare magnet：Nd-Fe-B rapidly quenched magnetic powder is loaded in hot pressing die, is heated in vacuum induction hot pressing furnace
700 DEG C, the isotropism hot pressing neodymium iron boron magnetic body for being close to 7.2g/cm3 density value is prepared, the magnet is pressed into diameter after cooling
26mm, the magnetic pole of height 15mm；
S2：Place magnet：The neodymium iron boron magnetic pole for obtaining is placed in die 10, upper extruding punch 7 is moved with pressure ring 8
To making at pressure ring 8 and die 10 just sealing, now pressure ring Pneumatic assembly 2 is in packing state；
S3：Pour protective gas：Enter middle row to the whole cavity between die 10 and pressure ring 8 to vacuumize, when digital display vacuum
Vacuum in cavity when 5.5 × 10-3pa is reached is measured to obtain, and intake valve is opened to applying argon gas in cavity, until vacuum shows
For 0.03Mpa；
S4：Hot pressing：Medium frequency induction power supply is opened, mould and material is heated, when neodymium iron boron magnetic body reaches 750 DEG C
When, be incubated 10 minutes, subsequently promote lower extruding punch 13 by material with certain extruding rate upwardly, the flow direction of material
With lower 13 direction of motion of extruding punch conversely, to upstream in 3.5mm gap between upper extruding punch 7 and lower extruding punch 13
Dynamic, form the thin-walled cup-shaped magnet of external diameter 43mm, wall thickness 3.5mm, height 34mm；
S5：Ejection：Stop heating until cup-shaped magnet cooled and solidified, using pressure ring Pneumatic assembly 2 by 7 He of upper extruding punch
Pressure ring 8 is pulled out upwards, then drives pusher set 15 that the neodymium iron boron magnetic body for being obtained is ejected die 10 using lower extruding punch 13.
Embodiment 2
A kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring, it is characterised in that：Including frame 22, and frame
22 lower end is provided with lower water-cooled push rod 21, and the upper end of frame 22 is provided with pressure ring Pneumatic assembly 2, and the upper end of frame 22 is installed
The outer end for having upper water-cooled push rod 1, lower water-cooled push rod 21 is socketed with water-cooling subbase 20, and the upper end of water-cooling subbase 20 is provided with one heart
Mould bases bracket 18, be socketed by mould bases gland 19 between mould bases bracket 18 and water-cooling subbase 20, and the upper end of mould bases bracket 18
Grafting is provided with mould bases 17, and the upper end of mould bases 17 is provided with die holder 12, and the upper end of die holder 12 is provided with by mould gland 11
Die 10, the rear end of die 10 are connected with vavuum pump, and the outer end of pressure ring 8 is coordinated with the sealing of die 10, the lower end peace of die holder 12
Equipped with induction coil 14, and pressure ring 8 is socketed with die 10, the lower end of upper water-cooled push rod 1 is socketed with pressure ring frame 4, pressure ring frame 4
Lower end is connected with pressure ring 8 by pressure ring spacer shell 6, and the upper end of pressure ring frame 4 is hinged with pressure ring seat 3, and the upper end connection of pressure ring seat 3
The push rod of pressure ring Pneumatic assembly 2.
Its preparation process is comprised the following steps：
S1：Prepare magnet：Nd-Fe-B rapidly quenched magnetic powder is loaded in hot pressing die, is heated in vacuum induction hot pressing furnace
650 DEG C, the isotropism hot pressing neodymium iron boron magnetic body for being close to 7.3g/cm3 density value is prepared, the magnet is pressed into diameter after cooling
26mm, the magnetic pole of height 15mm；
S2：Place magnet：The neodymium iron boron magnetic pole for obtaining is placed in die 10, upper extruding punch 7 is moved with pressure ring 8
To making at pressure ring 8 and die 10 just sealing, now pressure ring Pneumatic assembly 2 is in packing state；
S3：Pour protective gas：Enter middle row to the whole cavity between die 10 and pressure ring 8 to vacuumize, when digital display vacuum
Vacuum in cavity when 5.5 × 10-3pa is reached is measured to obtain, and intake valve is opened to applying argon gas in cavity, until vacuum shows
For 0.035Mpa；
S4：Hot pressing：Medium frequency induction power supply is opened, mould and material is heated, when neodymium iron boron magnetic body reaches 720 DEG C
When, be incubated 15 minutes, subsequently promote lower extruding punch 13 by material with certain extruding rate upwardly, the flow direction of material
With lower 13 direction of motion of extruding punch conversely, to upstream in 3mm gap between upper extruding punch 7 and lower extruding punch 13
Dynamic, form the thin-walled cup-shaped magnet of external diameter 43mm, wall thickness 3mm, height 34mm；
S5：Ejection：Stop heating until cup-shaped magnet cooled and solidified, using pressure ring Pneumatic assembly 2 by 7 He of upper extruding punch
Pressure ring 8 is pulled out upwards, then drives pusher set 15 that the neodymium iron boron magnetic body for being obtained is ejected die 10 using lower extruding punch 13.
Compared with prior art, the advantage of patent of the present invention is that preparation process only becomes through being hot pressed into magnetic pole, forward extrusion
Cup-shaped magnet twice molding procedure, and magnet magnet top during forward extrusion provides certain buffer brake all the time to guarantee
Workpiece is smoothly molded, and is so considerably improved ratio of briquetting and the production efficiency of magnet ring, is that anisotropy magnetic Nd-Fe-B ring closely becomes eventually
Type technique commercial application establishes solid foundation.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understanding can carry out multiple changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (2)
1. a kind of newly net forming processing unit (plant) of anisotropy Ru-Fe-Mn magnet ring, it is characterised in that：Including frame (22), and frame
(22) lower end is provided with lower water-cooled push rod (21), and the upper end of frame (22) is provided with pressure ring Pneumatic assembly (2), and frame
(22) upper end is provided with water-cooled push rod (1), and the outer end of lower water-cooled push rod (21) is socketed with water-cooling subbase (20), and water
The upper end of cold base (20) is provided with concentric mould bases bracket (18), leads between mould bases bracket (18) and water-cooling subbase (20)
Mould bases gland (19) socket is crossed, and the upper end grafting of mould bases bracket (18) is provided with mould bases (17), the upper end of mould bases (17)
Die holder (12) is installed, and the upper end of die holder (12) is provided with die (10) by mould gland (11), die (10)
Rear end is connected with vavuum pump, and the outer end of pressure ring (8) is coordinated with die (10) sealing, and thoughts are installed in the lower end of die holder (12)
Answer in coil (14), and die (10) and pressure ring (8) be socketed with, the lower end of upper water-cooled push rod (1) is socketed with pressure ring frame (4),
The lower end of pressure ring frame (4) is connected with pressure ring (8) by pressure ring spacer shell (6), and the upper end of pressure ring frame (4) is hinged with pressure
Ring seat (3), and the push rod of upper end connection pressure ring Pneumatic assembly (2) of pressure ring seat (3).
2. a kind of newly net forming processing method of anisotropy Ru-Fe-Mn magnet ring as claimed in claim 1, it is characterised in that bag
Include following steps：
S1：Prepare magnet：Nd-Fe-B rapidly quenched magnetic powder is loaded in hot pressing die, in vacuum induction hot pressing furnace, is heated to 650-
750 DEG C, prepare and be close to 7.2-7.3g/cm3The isotropism hot pressing neodymium iron boron magnetic body of density value；
S2：Place magnet：The neodymium iron boron magnetic body for obtaining is placed in die (10), upper extruding punch (7) is transported with pressure ring (8)
Moving makes pressure ring (8) and die (10) just at sealing, and now pressure ring Pneumatic assembly (2) is in packing state；
S3：Pour protective gas：Enter middle row to the whole cavity between die (10) and pressure ring (8) to vacuumize, when digital display vacuum
Measure vacuum in cavity reaches 5.5 × 10-3During pa, intake valve is opened to applying argon gas in cavity, until vacuum shows
For 0.03-0.04Mpa；
S4：Hot pressing：Medium frequency induction power supply is opened, mould and material is heated, when neodymium iron boron magnetic body reaches 700-850 DEG C
When, insulation promote to 20 minutes, subsequently within 5 minutes lower extruding punch (13) by material with certain extruding rate upwardly, material
Flow direction with lower extruding punch (13) direction of motion conversely, between upper extruding punch (7) and lower extruding punch (13)
1.5-3.5mm is flowed up in gap, forms the magnet of thin-walled cup-shaped；
S5：Ejection：Stop heating until cup-shaped magnet cooled and solidified, using pressure ring Pneumatic assembly (2) by upper extruding punch (7) and
Pressure ring (8) is pulled out upwards, then drives pusher set (15) to eject the neodymium iron boron magnetic body for being obtained using lower extruding punch (13)
Die (10).
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| CN201610884533.XA CN106486280B (en) | 2016-10-11 | 2016-10-11 | The newly net forming processing unit (plant) and method of a kind of anisotropy magnetic Nd-Fe-B ring |
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|---|---|---|---|
| CN201610884533.XA CN106486280B (en) | 2016-10-11 | 2016-10-11 | The newly net forming processing unit (plant) and method of a kind of anisotropy magnetic Nd-Fe-B ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334418A (en) * | 2021-12-29 | 2022-04-12 | 钢铁研究总院 | Combined type extrusion forming device and method suitable for neodymium iron boron permanent magnet ring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4963320A (en) * | 1989-04-14 | 1990-10-16 | Daido Tokushuko Kabushiki Kaisha | Method and apparatus for producing anisotropic rare earth magnet |
| CN101202143A (en) * | 2007-11-09 | 2008-06-18 | 钢铁研究总院 | High performance radial hot pressing magnet ring and preparation method thereof |
| CN103894607A (en) * | 2014-04-23 | 2014-07-02 | 上海交通大学 | Forming method and die of anisotropic annular magnet |
-
2016
- 2016-10-11 CN CN201610884533.XA patent/CN106486280B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4963320A (en) * | 1989-04-14 | 1990-10-16 | Daido Tokushuko Kabushiki Kaisha | Method and apparatus for producing anisotropic rare earth magnet |
| CN101202143A (en) * | 2007-11-09 | 2008-06-18 | 钢铁研究总院 | High performance radial hot pressing magnet ring and preparation method thereof |
| CN103894607A (en) * | 2014-04-23 | 2014-07-02 | 上海交通大学 | Forming method and die of anisotropic annular magnet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334418A (en) * | 2021-12-29 | 2022-04-12 | 钢铁研究总院 | Combined type extrusion forming device and method suitable for neodymium iron boron permanent magnet ring |
| CN114334418B (en) * | 2021-12-29 | 2022-10-11 | 钢铁研究总院 | Combined type extrusion forming device and method suitable for neodymium iron boron permanent magnet ring |
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| Publication number | Publication date |
|---|---|
| CN106486280B (en) | 2018-05-01 |
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