CN108831730A - A kind of preparation process of permanent magnet - Google Patents
A kind of preparation process of permanent magnet Download PDFInfo
- Publication number
- CN108831730A CN108831730A CN201810563392.0A CN201810563392A CN108831730A CN 108831730 A CN108831730 A CN 108831730A CN 201810563392 A CN201810563392 A CN 201810563392A CN 108831730 A CN108831730 A CN 108831730A
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- China
- Prior art keywords
- blank
- finished product
- magnet
- permanent magnet
- plating
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Classifications
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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
-
- 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
Abstract
The invention discloses a kind of preparation processes of permanent magnet, are related to magnet preparation technical field.The present invention includes the following steps：Step 1, blank preparation；Step 2, blank processing；It is step 3, once sintered；Step 4, orientation detection：Orientation detection is carried out to once sintered obtained finished product blank crystal；Step 5, apparent size detection；Step 6, double sintering：The qualified finished product blank of apparent size detection is put into sintering mold, and the spatial distribution in the orientation detection structural adjustment magnetic field according to blank crystal；Step 7, chamfer grinding；Step 8, pickling impurity removal：Step 9, plating phosphatization；Step 10 magnetizes.It includes carrying out two-step sintering, while carrying out magnet orientation and apparent size detection in process of production that the present invention, which passes through, guarantees processing quality while improving the processing efficiency of sintered magnet, and then reduce processing cost indirectly.
Description
Technical field
The invention belongs to magnet preparation technical fields, more particularly to a kind of preparation process of permanent magnet.
Background technique
Magnet can be divided into " permanent magnet " and " impermanent magnet ".Permanent magnet can be natural products, also known as natural magnetic
Stone, can also be by manually manufacturing；Traditional magnet preparation method successively includes ingredient, melting ingot, powder processed, die mould, is sintered back
Fire, magnetic detection, mill processing, pin cut the processes such as processing, plating, magnetization, finished product；In the prior art, magnet adds through overground
Working hour, it will usually boil at discrete piece after glue deoils by the oil sheet cut after processing, mill processing then be carried out again, for big specification work
Part, discrete piece after boiling glue can also use one by one by the mill processing of formula double-ended grinding machine, then the workpiece of small dimension, dissipates
Piece state be difficult to high efficiency, high quality carry out by formula double-end grinding grinding machine grind machined.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation processes of permanent magnet, improve the same of the processing efficiency of sintered magnet
When guarantee processing quality, and then reduce processing cost indirectly.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is a kind of preparation process of permanent magnet, is included the following steps：
Step 1, blank preparation：Magnetic powder is put into oriented moulding in the magnetic field that magnetic field strength is 20000Gs-25000Gs, then
Blank is made by 400-450MPa pressure static pressure；
Step 2, blank processing：Manufactured blank is subjected to machine-shaping using slicer；
It is step 3, once sintered：It molding blank will be sliced is put into sintering furnace under protection of argon gas and be sintered to obtain finished product
Blank；
Step 4, orientation detection：Orientation detection is carried out to once sintered obtained finished product blank crystal；
Step 5, apparent size detection：Finished product blank dimension appearance is detected, it is underproof to abandon；
Step 6, double sintering：The qualified finished product blank of apparent size detection is put into sintering mold, and according to blank
The spatial distribution in the orientation detection structural adjustment magnetic field of crystal；
Step 7, chamfer grinding：The both side surface for the semi-finished product magnet that double sintering obtains is subjected to mill working process；
Step 8, pickling impurity removal：It is cleaned with surface of the acid solution to the semi-finished product magnet after chamfer grinding；
Step 9, plating phosphatization：Semi-finished product magnet after pickling is subjected to plating phosphorating treatment；And it checks at plating phosphatization
Thickness of coating after reason, the appearance and size of magnet；Plating phosphatization is re-started after underproof removing coating；
Step 10 magnetizes：Semi-finished product magnet after the plating of passed examination is put into and is magnetized to obtain in magnetizing equipment
Finished product permanent magnet.
Further, in the step 2 blank be processed into rectangular sheet, circular piece, triangular piece or polygonal patch one
Kind.
Further, it includes following process that the step 3 is once sintered：It first is warming up to 650-700 DEG C with 5-10 DEG C/min,
3-4h is kept the temperature, 1000-1050 DEG C of sintering 4-5h is then warming up to 10-15 DEG C/min；Finally moving to temperature is 60-80 DEG C dry
70 DEG C are cooled in dry room.
Further, step 6 double sintering includes following process：Mold is warming up to 800-900 DEG C, is put into finished product
Blank；Then to be warming up to 1000-1400 DEG C with 10-15 DEG C/min, and constant temperature is handled under the conditions of 1000-1400 DEG C of temperature
2-6h；Finally cool down near room temperature.
Further, it is 0.075mol/L- that the acid solution used in the process of step 8 pickling impurity removal, which selects hydrogen ion concentration,
The inorganic acid solution of 1mol/L；The inorganic acid selects any one in hydrochloric acid, sulfuric acid and nitric acid.
Further, it is described carry out step 10 magnetize between also need by plating after semi-finished product magnet be placed in argon atmosphere
Lower heat treatment 2-3h, heat treatment temperature are 850-950 DEG C, must be magnetized to obtain permanent magnet after being cooled to room temperature.
The invention has the advantages that：
It includes carrying out two-step sintering, while carrying out magnet orientation in process of production that magnet preparation process of the invention, which passes through,
It is detected with apparent size, guarantees processing quality while improving the processing efficiency of sintered magnet, and then reduce and be processed into indirectly
This；The present invention carries out double sintering after once sintered, is evenly distributed by the readily available phase of double sintering, compactness is good, magnetic
Magnet of good performance.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the preparation technology flow chart of permanent magnet of the present invention.
Specific embodiment
A kind of preparation process of permanent magnet, includes the following steps：
Step 1, blank preparation：Magnetic powder is put into oriented moulding in the magnetic field that magnetic field strength is 20000Gs-25000Gs, then
Blank is made by 400-450MPa pressure static pressure；
Step 2, blank processing：Manufactured blank is subjected to machine-shaping using slicer；
It is step 3, once sintered：It molding blank will be sliced is put into sintering furnace under protection of argon gas and be sintered to obtain finished product
Blank；
Step 4, orientation detection：Orientation detection is carried out to once sintered obtained finished product blank crystal；
Step 5, apparent size detection：Finished product blank dimension appearance is detected, it is underproof to abandon；
Step 6, double sintering：The qualified finished product blank of apparent size detection is put into sintering mold, and according to blank
The spatial distribution in the orientation detection structural adjustment magnetic field of crystal；
Step 7, chamfer grinding：The both side surface for the semi-finished product magnet that double sintering obtains is subjected to mill working process；
Step 8, pickling impurity removal：It is cleaned with surface of the acid solution to the semi-finished product magnet after chamfer grinding；
Step 9, plating phosphatization：Semi-finished product magnet after pickling is subjected to plating phosphorating treatment；And it checks at plating phosphatization
Thickness of coating after reason, the appearance and size of magnet；Plating phosphatization is re-started after underproof removing coating；
Step 10 magnetizes：Semi-finished product magnet after the plating of passed examination is put into and is magnetized to obtain in magnetizing equipment
Finished product permanent magnet.
Preferably, blank is processed into one of rectangular sheet, circular piece, triangular piece or polygonal patch in step 2.
Preferably, it includes following process that step 3 is once sintered：It first is warming up to 650-700 DEG C with 5-10 DEG C/min, keeps the temperature 3-
Then 4h is warming up to 1000-1050 DEG C of sintering 4-5h with 10-15 DEG C/min；It finally moves in the hothouse that temperature is 60-80 DEG C
It is cooled to 70 DEG C.
Preferably, step 6 double sintering includes following process：Mold is warming up to 800-900 DEG C, is put into finished product blank；
Then to be warming up to 1000-1400 DEG C with 10-15 DEG C/min, and constant temperature handles 2-6h under the conditions of 1000-1400 DEG C of temperature；
Finally cool down near room temperature.
Preferably, it is 0.075mol/L-1mol/L that the acid solution used in the process of step 8 pickling impurity removal, which selects hydrogen ion concentration,
Inorganic acid solution；Inorganic acid selects any one in hydrochloric acid, sulfuric acid and nitric acid.
Preferably, carry out step 10 magnetize between also need by plating after semi-finished product magnet be placed under argon atmosphere at heat
2-3h is managed, heat treatment temperature is 850-950 DEG C, must be magnetized to obtain permanent magnet after being cooled to room temperature.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. a kind of preparation process of permanent magnet, which is characterized in that include the following steps：
Step 1, blank preparation：Magnetic powder is put into oriented moulding in the magnetic field that magnetic field strength is 20000Gs-25000Gs, then is passed through
Blank is made in 400-450MPa pressure static pressure；
Step 2, blank processing：Manufactured blank is subjected to machine-shaping using slicer；
It is step 3, once sintered：It molding blank will be sliced is put into sintering furnace under protection of argon gas and be sintered to obtain finished product hair
Base；
Step 4, orientation detection：Orientation detection is carried out to once sintered obtained finished product blank crystal；
Step 5, apparent size detection：Finished product blank dimension appearance is detected, it is underproof to abandon；
Step 6, double sintering：The qualified finished product blank of apparent size detection is put into sintering mold, and according to blank crystal
Orientation detection structural adjustment magnetic field spatial distribution；
Step 7, chamfer grinding：The both side surface for the semi-finished product magnet that double sintering obtains is subjected to mill working process；
Step 8, pickling impurity removal：It is cleaned with surface of the acid solution to the semi-finished product magnet after chamfer grinding；
Step 9, plating phosphatization：Semi-finished product magnet after pickling is subjected to plating phosphorating treatment；And after checking plating phosphorating treatment
Thickness of coating, the appearance and size of magnet；Plating phosphatization is re-started after underproof removing coating；
Step 10 magnetizes：Semi-finished product magnet after the plating of passed examination is put into and is magnetized to obtain finished product in magnetizing equipment
Permanent magnet.
2. a kind of preparation process of permanent magnet according to claim 1, which is characterized in that blank is processed in the step 2
Rectangular, circular piece, one of triangular piece or polygonal patch.
3. a kind of preparation process of permanent magnet according to claim 1, which is characterized in that the once sintered packet of step 3
Include following process：It first is warming up to 650-700 DEG C with 5-10 DEG C/min, 3-4h is kept the temperature, is then warming up to 10-15 DEG C/min
1000-1050 DEG C of sintering 4-5h；It finally moves in the hothouse that temperature is 60-80 DEG C and is cooled to 70 DEG C.
4. a kind of preparation process of permanent magnet according to claim 1, which is characterized in that the step 6 double sintering packet
Include following process：Mold is warming up to 800-900 DEG C, is put into finished product blank；Then to be warming up to 1000- with 10-15 DEG C/min
1400 DEG C, and constant temperature handles 2-6h under the conditions of 1000-1400 DEG C of temperature；Finally cool down near room temperature.
5. a kind of preparation process of permanent magnet according to claim 1, which is characterized in that the step 8 pickling impurity removal mistake
It is the inorganic acid solution of 0.075mol/L-1mol/L that acid solution used in journey, which selects hydrogen ion concentration,；The inorganic acid selects salt
Any one in acid, sulfuric acid and nitric acid.
6. a kind of preparation process of permanent magnet according to claim 1, which is characterized in that the progress step 10 magnetizes it
Between also need to be placed under argon atmosphere and be heat-treated 2-3h the semi-finished product magnet after plating, heat treatment temperature is 850-950 DEG C, cold
But to must be magnetized to obtain permanent magnet after room temperature.
Priority Applications (1)
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| CN201810563392.0A CN108831730A (en) | 2018-06-04 | 2018-06-04 | A kind of preparation process of permanent magnet |
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| CN201810563392.0A CN108831730A (en) | 2018-06-04 | 2018-06-04 | A kind of preparation process of permanent magnet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851318A (en) * | 2021-08-26 | 2021-12-28 | 杭州永磁集团有限公司 | Preparation method of high-performance bonded magnetic steel assembly |
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| EP2763145A1 (en) * | 2011-09-30 | 2014-08-06 | Nitto Denko Corporation | Permanent magnet and production method for permanent magnet |
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| CN113851318A (en) * | 2021-08-26 | 2021-12-28 | 杭州永磁集团有限公司 | Preparation method of high-performance bonded magnetic steel assembly |
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Application publication date: 20181116 |