CN107958776A - A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation - Google Patents
A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation Download PDFInfo
- Publication number
- CN107958776A CN107958776A CN201710937360.8A CN201710937360A CN107958776A CN 107958776 A CN107958776 A CN 107958776A CN 201710937360 A CN201710937360 A CN 201710937360A CN 107958776 A CN107958776 A CN 107958776A
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- China
- Prior art keywords
- magnet
- permanent
- orientation
- lower die
- shaping
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- 238000007493 shaping process Methods 0.000 title claims abstract description 26
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000000696 magnetic material Substances 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000005389 magnetism Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- 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
- H01F41/0273—Imparting anisotropy
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation, belongs to magnetic material preparing technical field, comprises the following steps：Step 1）, using thickness direction as differently- oriented directivity, the magnet shrinkage rates of differently- oriented directivity are 1.3, and the magnet shrinkage rates in non-oriented direction are 1.14, magnet shrinkage rates=green compact size/, calculate green compact size；Manufacture and design mould according to green compact size；Step 2）, installation forming aligning device, makes briquetting pressure direction vertical with alignment magnetic field direction；Step 3）, it is molded according to shaping permanent-magnet ferrite technological requirement.A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation, using the vertical magnetic field method of forming, i.e. magnetic direction is vertical with pressure direction, and compared with the parallel magnetic field method of forming, i.e., magnetic direction is parallel with pressure direction, is more advantageous to the brilliant material orientation of material.
Description
Technical field
The invention belongs to magnetic material preparing technical field, and in particular to for it is a kind of improve permanent-magnet ferrite rectangular magnet into
The method of the type degree of orientation.
Background technology
Permanent magnetic ferrite magnet has isotropic magnet and anisotropy magnet, and difference lies in add external magnetic field to take during shaping
To the magnet of molding mass compacting is anisotropy magnet.Anisotropy magnet magnetic property is much higher than isotropic magnet, determines
For the factor of anisotropy magnet magnetic parameter height in addition to material, more factors are decided by the size of degree of orientation during shaping,
Remanent magnetism Br=6s.d.f in permanent-magnet ferrite material magnetic parameter, wherein 6s are the specific saturation magnetization of material, are determined by material
Fixed, d is product density, is determined by pressure.F is the degree of orientation, by magnetic field intensity and aligned is determined.In stable magnetic field intensity
During orientation, material grains prolong the catenation of C axis orientation, if material grains can all orderly catenations, very high take can be produced
Xiang Du.
The content of the invention
It is an object of the invention to overcome the defects of mentioned above and deficiency, and provide a kind of raising permanent-magnet ferrite rectangle
The method that magnet is molded the degree of orientation.
The present invention realizes that the technical solution that its purpose uses is as follows.
A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation, comprises the following steps：Step 1）, with thickness
Degree direction is differently- oriented directivity, and the magnet shrinkage rates of differently- oriented directivity are 1.3, and the magnet shrinkage rates in non-oriented direction are 1.14,
Magnet shrinkage rates=green compact size/, calculate green compact size；Manufacture and design mould according to green compact size；
Step 2）, installation forming aligning device, makes briquetting pressure direction vertical with alignment magnetic field direction；
Step 3）, it is molded according to shaping permanent-magnet ferrite technological requirement.
Step 2）In, shaping aligning device includes：Press top shoe, upper mold, mold cavity, coil cartridge, lower die, magnetization
Coil, press sliding block；The upper mold is installed on the lower end of press top shoe；The lower die is installed on the upper of press sliding block
End；The upper mold is located at directly over lower die, and mold cavity is folded between the upper die and lower die；Mold cavity is equipped with base
Part；The coil cartridge is installed on mold cavity side；The magnetizing coil is installed on the upper and lower ends of coil cartridge.
Step 3）In, the permanent-magnet ferrite material prepared is added to the die cavity of mould, starts shaping aligning device, upper mold exists
Press top shoe drives lower downlink, lower die uplink under the drive of press sliding block；Upper mold is close to mold cavity and molds, and lower die is leaned on
Nearly mold cavity simultaneously molds, and connects magnetic charging system power supply generation magnetic field and carries out the orientation that magnetizes to permanent-magnet ferrite material, compacting reaches
Press release after certain pressure, stopping magnetize and slightly demagnetize, and remove performance magnetism, and the backhaul of mould upper cylinder half is simultaneously moulded adobe blocks, and takes base, is cleared up
Mould, returns to repeatable position.
Upper mold, mold cavity and lower die constitute mould；Coil cartridge and magnetizing coil constitute magnetic charging system；Upper mold,
Mold cavity and lower die are made by non-magnetic material；Coil cartridge is made of the material of magnetic conduction.
There should be the coil cartridge of a magnetic conduction among the magnetizing coil, its size should be greater than being equal to shaped article orientation
Green compact size.
A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation, using the vertical magnetic field method of forming, i.e. magnetic field
Direction is vertical with pressure direction, and compared with the parallel magnetic field method of forming, i.e., magnetic direction is parallel with pressure direction, is more advantageous to material
Crystalline substance material orientation.This is because normal beam technique compression direction expects pellet chain perpendicular to orientation, orientation is hardly destroyed, and parallel method
Upper push-down head compression direction expects pellet chain parallel to orientation, the movement that the orientation expected in compression process is expected and destroy.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
In figure：Press top shoe 1, upper mold 2, blank 3, mold cavity 4, coil cartridge 5, lower die 6, magnetizing coil 7, press glide
Block 8.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in further detail.
A kind of method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation, comprises the following steps：Step 1, shaping pressure
Make long 85mm, width 65mm, the rectangular magnet of thickness 15mm；Using thickness direction as differently- oriented directivity, the magnet shrinkage rates of differently- oriented directivity
For 1.3, the magnet shrinkage rates in non-oriented direction are 1.14, and magnet shrinkage rates=green compact size/product drawing size+mill adds
Work amount, calculates green compact size as long 96.9mm, width 74.1mm, thickness 20.8mm；Manufacture and design mould according to green compact size；
Step 2, installation forming aligning device, makes briquetting pressure direction vertical with alignment magnetic field direction；Shaping aligning device includes：
Press top shoe 1, upper mold 2, mold cavity 4, coil cartridge 5, lower die 6, magnetizing coil 7, press sliding block 8；The upper mold 2 is pacified
Lower end loaded on press top shoe 1；The lower die 6 is installed on the upper end of press sliding block 8；The upper mold 2 be located at lower die 6 just on
Side, mold cavity 4 is folded between the upper mold 2 and lower die 6；Mold cavity 4 is equipped with blank 3；The coil cartridge 5 is installed
In 4 side of mold cavity；The magnetizing coil 7 is installed on the upper and lower ends of coil cartridge 5；
Upper mold 2, mold cavity 4 and lower die 6 constitute mould；Coil cartridge 5 and magnetizing coil 7 constitute magnetic charging system.
Upper mold 2, mold cavity 4 and lower die 6 are made by non-magnetic material.
Coil cartridge 5 is made of the material of magnetic conduction.
There should be the coil cartridge 5 of a magnetic conduction among magnetizing coil 7, its size should be greater than being equal to shaped article orientation
Green compact size, effect are to concentrate the magnetic line of force to form magnetizing field.
Step 3, it is molded according to shaping permanent-magnet ferrite technological requirement；The permanent-magnet ferrite material prepared is added into mould
The die cavity of tool, starts shaping aligning device, and upper mold 2 downlink, lower die 6 under the drive of press top shoe 1 drive in press sliding block 8
Lower uplink；Upper mold 2 is close to mold cavity 4 and molds, and lower die 6 is close to mold cavity 4 and molds, and connects magnetic charging system power supply and produces
Magnetic field carries out the orientation that magnetizes to permanent-magnet ferrite material, if wet method material then connects pumping system and draws water to slurry at this time, if dry
Method material does not draw water then, and compacting reaches press release after certain pressure, and stopping magnetizes and slightly demagnetizes, and removes and shows magnetism, on mould
Cylinder backhaul is simultaneously moulded adobe blocks, and takes base, is cleared up mould, is returned to repeatable position.
Green compact after shaping are compareed such as through oversintering, mill processing, performance test, its magnetic property by two kinds of aligned differences
Under：
The present invention is illustrated according to embodiment, and on the premise of present principles are not departed from, the present apparatus can also make some changes
Shape and improvement.It should be pointed out that all technical solutions obtained using modes such as equivalent substitution or equivalent transformations, all fall within the present invention
Protection domain in.
Claims (5)
- A kind of 1. method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation, it is characterised in that comprise the following steps：Step Rapid 1）, using thickness direction as differently- oriented directivity, the magnet shrinkage rates of differently- oriented directivity are 1.3, the magnet shrinkage ratio in non-oriented direction Example is 1.14, magnet shrinkage rates=green compact size/（Product drawing size+mill processing capacity）, calculate green compact size；According to green compact Size design manufactures mould；Step 2）, installation forming aligning device, makes briquetting pressure direction vertical with alignment magnetic field direction；Step 3）, it is molded according to shaping permanent-magnet ferrite technological requirement.
- A kind of 2. method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation as claimed in claim 1, it is characterised in that Step 2）In, shaping aligning device includes：Press top shoe（1）, upper mold（2）, mold cavity（4）, coil cartridge（5）, lower die （6）, magnetizing coil（7）, press sliding block（8）；The upper mold（2）It is installed on press top shoe（1）Lower end；The lower die （6）It is installed on press sliding block（8）Upper end；The upper mold（2）Positioned at lower die（6）Surface, the upper mold（2）And lower die （6）Between be folded with mold cavity（4）；Mold cavity（4）It is equipped with blank（3）；The coil cartridge（5）It is installed on mould type Chamber（4）Side；The magnetizing coil（7）It is installed on coil cartridge（5）Upper and lower ends.
- A kind of 3. method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation as claimed in claim 2, it is characterised in that Step 3）In, the permanent-magnet ferrite material prepared is added to the die cavity of mould, starts shaping aligning device, upper mold（2）In press Top shoe（1）Drive lower downlink, lower die（6）In press sliding block（8）Drive lower uplink；Upper mold（2）Close to mold cavity（4）And Molding, lower die（6）Close to mold cavity（4）And mold, connect magnetic charging system power supply and produce magnetic field to the progress of permanent-magnet ferrite material Magnetize orientation, and compacting reaches press release after certain pressure, and stopping magnetizes and slightly demagnetizes, and removes performance magnetism, and mould upper cylinder half returns Journey is simultaneously moulded adobe blocks, and takes base, is cleared up mould, is returned to repeatable position.
- A kind of 4. method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation as claimed in claim 2, it is characterised in that Upper mold（2）, mold cavity（4）And lower die（6）Constitute mould；Coil cartridge（5）And magnetizing coil（7）Constitute to magnetize and be System；Upper mold（2）, mold cavity（4）And lower die（6）It is made by non-magnetic material；Coil cartridge（5）By the material system of magnetic conduction Into.
- A kind of 5. method for improving the permanent-magnet ferrite rectangular magnet shaping degree of orientation as claimed in claim 2, it is characterised in that The magnetizing coil（7）Centre should have the coil cartridge of a magnetic conduction（5）, its size should be greater than be equal to the shaped article orientation Green compact size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710937360.8A CN107958776B (en) | 2017-09-30 | 2017-09-30 | Method for improving forming orientation degree of permanent magnetic ferrite rectangular magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710937360.8A CN107958776B (en) | 2017-09-30 | 2017-09-30 | Method for improving forming orientation degree of permanent magnetic ferrite rectangular magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107958776A true CN107958776A (en) | 2018-04-24 |
| CN107958776B CN107958776B (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710937360.8A Active CN107958776B (en) | 2017-09-30 | 2017-09-30 | Method for improving forming orientation degree of permanent magnetic ferrite rectangular magnet |
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| Country | Link |
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| CN (1) | CN107958776B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109435017A (en) * | 2018-11-27 | 2019-03-08 | 闫溪 | A kind of permanent-magnet ferrite hydraulic press magnetic field optimization structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286980A (en) * | 2013-06-18 | 2013-09-11 | 南通国谊锻压机床有限公司 | Mould pressing device of radiating orientation forming hydraulic machine |
| JP2014160729A (en) * | 2013-02-19 | 2014-09-04 | Sumitomo Electric Ind Ltd | Manufacturing method of magnetic member and magnetic member |
| JP2015023243A (en) * | 2013-07-23 | 2015-02-02 | Tdk株式会社 | Rare earth magnet, electric motor, and device with electric motor |
| CN205551463U (en) * | 2016-03-09 | 2016-09-07 | 宁波钉子博士磁性技术有限公司 | Radiate press die carrier of oriented cyclic annular magnet |
| CN106514843A (en) * | 2016-12-23 | 2017-03-22 | 安徽龙磁科技股份有限公司 | Mold of permanent magnetic ferrite radial direction uniform orientation magnetic ring and manufacturing method of permanent magnetic ferrite radial direction uniform orientation magnetic ring |
-
2017
- 2017-09-30 CN CN201710937360.8A patent/CN107958776B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014160729A (en) * | 2013-02-19 | 2014-09-04 | Sumitomo Electric Ind Ltd | Manufacturing method of magnetic member and magnetic member |
| CN103286980A (en) * | 2013-06-18 | 2013-09-11 | 南通国谊锻压机床有限公司 | Mould pressing device of radiating orientation forming hydraulic machine |
| JP2015023243A (en) * | 2013-07-23 | 2015-02-02 | Tdk株式会社 | Rare earth magnet, electric motor, and device with electric motor |
| CN205551463U (en) * | 2016-03-09 | 2016-09-07 | 宁波钉子博士磁性技术有限公司 | Radiate press die carrier of oriented cyclic annular magnet |
| CN106514843A (en) * | 2016-12-23 | 2017-03-22 | 安徽龙磁科技股份有限公司 | Mold of permanent magnetic ferrite radial direction uniform orientation magnetic ring and manufacturing method of permanent magnetic ferrite radial direction uniform orientation magnetic ring |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109435017A (en) * | 2018-11-27 | 2019-03-08 | 闫溪 | A kind of permanent-magnet ferrite hydraulic press magnetic field optimization structure |
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| CN107958776B (en) | 2020-05-19 |
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Denomination of invention: A method to improve the forming orientation of rectangular permanent magnet ferrite magnets Effective date of registration: 20231117 Granted publication date: 20200519 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG KAIVEN MAGNET Co.,Ltd. Registration number: Y2023980066076 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |