CN113851322A - Production and processing technology of sintered neodymium iron boron workpiece - Google Patents
Production and processing technology of sintered neodymium iron boron workpiece Download PDFInfo
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- CN113851322A CN113851322A CN202111205308.6A CN202111205308A CN113851322A CN 113851322 A CN113851322 A CN 113851322A CN 202111205308 A CN202111205308 A CN 202111205308A CN 113851322 A CN113851322 A CN 113851322A
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- iron boron
- neodymium iron
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 126
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- 238000005192 partition Methods 0.000 claims abstract description 37
- 238000005245 sintering Methods 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000011265 semifinished product Substances 0.000 claims abstract description 8
- 238000004381 surface treatment Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 4
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000008595 infiltration Effects 0.000 claims abstract description 4
- 238000001764 infiltration Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 239000003973 paint Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007581 slurry coating method Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000007885 magnetic separation Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 14
- 239000010425 asbestos Substances 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01F41/0286—Trimming
-
- 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
- H01F1/0577—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 sintered
-
- 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
-
- 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
- H01F41/0293—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 diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a production and processing technology of a sintered neodymium iron boron workpiece, which comprises the steps of S1, cutting a sintered neodymium iron boron blank to obtain a sintered neodymium iron boron sheet; s2, carrying out surface treatment on the sintered neodymium iron boron sheet; s3, conveying the sintered NdFeB sheet coated with the coating on the surface into a sintering furnace, performing heat treatment, completing dysprosium infiltration treatment, and simultaneously separating the sintered NdFeB semi-finished product and the partition plate; s4, mechanically processing the separated sintered neodymium iron boron semi-finished product to obtain a sintered neodymium iron boron workpiece meeting the production requirement; and S5, coating the sintered NdFeB workpiece. According to the production and processing technology of the sintered neodymium iron boron workpiece, the convex nails are used for melting and connecting the neodymium iron boron in the cavity and the corresponding partition plates during sintering, non-stick coatings are coated on the non-magnetic conduction box body and the cover plate, the phenomenon that the non-magnetic conduction box body and the cover plate are connected with the neodymium iron boron during sintering is avoided, a blank material with the neodymium iron boron connected with the partition plates is obtained after sintering is completed, the partition plates are directly clamped to realize fixing of the blank material, and bonding by using glue is avoided.
Description
Technical Field
The invention relates to the technical field related to sintered neodymium iron boron, in particular to a production and processing technology of a sintered neodymium iron boron workpiece.
Background
The sintered Nd-Fe-B permanent magnet material has excellent magnetic performance and is widely applied to electronic equipment, the sintered Nd-Fe-B permanent magnet material adopts a powder metallurgy process, the smelted alloy is made into powder and pressed into a pressed blank in a magnetic field, and the pressed blank is sintered in inert gas or vacuum to achieve densification.
The shape and size of the sintered NdFeB workpiece are determined by using conditions, and in the production process, except for the workpiece with a regular large size, the sintered NdFeB workpiece with other shapes is difficult to form at one time, so that in the powder metallurgy process, a large blank is required to be produced firstly, and then the sintered NdFeB workpiece with the shape and size meeting the requirements of customers is produced through mechanical processing (including cutting, punching and the like), grinding and surface coating treatment.
After obtaining sintering blank material among the prior art, need earlier on blank material bonds the asbestos board, on being fixed to anchor clamps with the asbestos board, conveniently cut the device and cut into the fritter with blank material, still need boil the material after cutting and wash, remove the glue that bonds usefulness on the blank material, then need dry the sintering neodymium iron boron of fritter and just can get into next step, not only the process is loaded down with trivial details, consume for a long time, use glue in a large number moreover, be unfavorable for the environmental protection.
Disclosure of Invention
The invention provides a production and processing technology of a sintered neodymium-iron-boron workpiece in order to make up for market blank.
The invention aims to provide a production and processing technology of a sintered neodymium iron boron workpiece, and the production and processing technology is used for solving the problems that in the prior art proposed in the background art, a blank material needs to be firstly adhered to an asbestos plate, a cutting device is convenient to cut the blank material into small pieces, the blank material needs to be boiled and cleaned after being cut, glue used for adhering the blank material is removed, then the small pieces of sintered neodymium iron boron need to be dried, the next step can be carried out, the process is complicated, the consumed time is long, and the problem that glue is used in a large amount and is not beneficial to environmental protection is solved.
In order to achieve the purpose, the invention provides the following technical scheme: a production and processing technology of a sintered NdFeB workpiece comprises the following steps:
s1, cutting the sintered neodymium iron boron blank to obtain a sintered neodymium iron boron sheet;
s2, carrying out surface treatment on the sintered neodymium iron boron sheet, wherein the surface treatment comprises end face grinding and dysprosium-infiltrated slurry coating;
s3, conveying the sintered NdFeB sheet coated with the coating on the surface into a sintering furnace, performing heat treatment, completing dysprosium infiltration treatment, and simultaneously separating the sintered NdFeB semi-finished product and the partition plate;
s4, mechanically processing the separated sintered neodymium iron boron semi-finished product to obtain a sintered neodymium iron boron workpiece with a shape and a size meeting the production requirements;
and S5, coating the sintered NdFeB workpiece.
Further, the preparation of the sintered nd-fe-b blank in S1 includes the following steps:
the first step batching, the raw materials for producing sintered neodymium iron boron work piece include: weighing various raw materials according to the proportion, wherein the raw materials comprise rare earth metal neodymium, metal element iron, nonmetal element boron and the like;
secondly, smelting a casting sheet, melting the prepared raw materials into alloy liquid and casting the alloy liquid into a sheet;
thirdly, performing hydrogen crushing, namely crushing the neodymium iron boron alloy sheet in a hydrogen environment to obtain neodymium iron boron crushed material;
fourthly, airflow milling to prepare powder, namely adding the crushed neodymium iron boron into an airflow mill, further crushing to obtain neodymium iron boron powder, and mutually colliding and fusing the powder in a high-pressure airflow environment;
fifthly, forming, namely filling the mixed neodymium iron boron powder into a non-magnetic conductive box body coated with non-stick paint, applying pressure, and sealing to obtain a combination of the neodymium iron boron and the non-magnetic conductive box body;
and sixthly, sintering, namely conveying the combined body into a sintering furnace for sintering to obtain a sintered neodymium iron boron blank connected with the partition plate.
Further, the fifth step of forming includes:
coating: uniformly coating a layer of non-stick paint on the inner surfaces of the non-magnetic box body and the cover plate, and installing the partition plates on the non-magnetic box body in sequence after the non-stick paint is dried;
filling: putting the weighed neodymium iron boron powder into a cavity;
profiling: pressing the neodymium iron boron powder to obtain a neodymium iron boron green blank meeting the requirements;
and (4) capping: and buckling the cover plate on the non-magnetic conductive box body, and wrapping the neodymium iron boron green body in an all-dimensional manner to obtain a combined body.
Furthermore, a slot is formed in the center of the bottom plate of the non-magnetic-conductive box body, clamping grooves are symmetrically formed in the front side plate and the rear side plate of the non-magnetic-conductive box body, and the clamping grooves and the slot correspond to the partition plate and the inserting column respectively.
Furthermore, the division board is the protruding font structure of rotatory one hundred eighty degrees, the outside formation fixture block that extends in both sides limit upper portion of division board, the round hole has been seted up on a side of division board, and is provided with the protruding nail in the round hole, the division board is separated the inner chamber of non-magnetic conduction box body forms a plurality of die cavities.
Furthermore, the cavity is filled with neodymium iron boron powder, and the size of the cavity is smaller than that of the inner cavity.
Furthermore, the top end of the inserted column is connected with the bottom surface of the cover plate, press blocks are arranged on the bottom surface of the cover plate at equal intervals, and the press blocks correspond to the cavities one to one.
Furthermore, the non-stick coating is used for preventing the sintered neodymium iron boron from being connected with the non-magnetic conduction box body in a high-temperature environment.
Furthermore, the convex nail is used for connecting the sintered neodymium iron boron and the partition plate.
Compared with the prior art, the invention has the beneficial effects that: the production and processing technology of the sintered neodymium iron boron workpiece has reasonable structure, the partition board is used for dividing the inner cavity into the cavities with smaller sizes, the subsequent cutting times are reduced, the production efficiency is improved, the convex nails are used for melting and connecting the neodymium iron boron in the cavities and the corresponding partition boards during sintering, the non-magnetic conductive box body and the cover board are coated with non-stick coatings, the neodymium iron boron is prevented from being connected with the neodymium iron boron during sintering, blank materials of the neodymium iron boron and the partition boards are obtained after sintering is finished, the partition boards are directly clamped to fix the blank materials, the use of glue for bonding is avoided, the bonding, material boiling and drying procedures are reduced, the production efficiency is greatly improved, the processing cost is reduced, the blank materials connected with the partition boards are sent into a sintering furnace for tempering, the convex nail is fused in the tempering process, so that the separated neodymium iron boron is conveniently separated from the separation plate, the existing process is directly utilized, and the additional process is avoided.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic view of a process for preparing a blank according to the present invention;
FIG. 3 is a schematic top view of a non-magnetic conductive case of the present invention;
FIG. 4 is a schematic cross-sectional front view of a non-magnetic conductive case of the present invention;
fig. 5 is an overall schematic view of the partition plate of the structure of the present invention.
In the figure: 1. a non-magnetic box body; 2. a partition plate; 3. a cavity; 4. a cover plate; 11. a card slot; 12. a slot; 13. an inner cavity; 21. a convex nail; 22. a clamping block; 41. briquetting; 42. and (5) inserting the column.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: referring to fig. 1-5, the present invention provides a technical solution: a production and processing technology of a sintered NdFeB workpiece comprises the following steps:
s1, cutting the sintered neodymium iron boron blank to obtain a sintered neodymium iron boron sheet;
s2, carrying out surface treatment on the sintered neodymium iron boron sheet, wherein the surface treatment comprises end face grinding and dysprosium-infiltrated slurry coating;
s3, conveying the sintered NdFeB sheet coated with the coating on the surface into a sintering furnace, performing heat treatment, completing dysprosium infiltration treatment, and simultaneously separating the sintered NdFeB semi-finished product and the partition plate 2;
s4, mechanically processing the separated sintered neodymium iron boron semi-finished product to obtain a sintered neodymium iron boron workpiece with a shape and a size meeting the production requirements;
and S5, coating the sintered NdFeB workpiece.
When using this production and processing technology of sintered neodymium iron boron work piece, division board 2 above the direct centre gripping is fixed after obtaining sintered neodymium iron boron blank, avoid using glue to bond, reduce the bonding treatment process, cut the step and divide into the fritter with sintered neodymium iron boron blank after that, realize directly getting into the surface treatment step after cutting sintered neodymium iron boron blank, reduce the production required time, improve production efficiency, help protecting ecological environment, when separating division board 2, also utilize original technology process to operate, avoid increasing extra manufacturing cost.
The second embodiment is as follows: as shown in fig. 2, the preparation of the sintered nd-fe-b blank in S1 includes the following steps:
the first step batching, the raw materials for producing sintered neodymium iron boron work piece include: weighing various raw materials according to the proportion, wherein the raw materials comprise rare earth metal neodymium, metal element iron, nonmetal element boron and the like;
secondly, smelting a casting sheet, melting the prepared raw materials into alloy liquid and casting the alloy liquid into a sheet;
thirdly, performing hydrogen crushing, namely crushing the neodymium iron boron alloy sheet in a hydrogen environment to obtain neodymium iron boron crushed material;
fourthly, airflow milling to prepare powder, namely adding the crushed neodymium iron boron into an airflow mill, further crushing to obtain neodymium iron boron powder, and mutually colliding and fusing the powder in a high-pressure airflow environment;
fifthly, forming, namely filling the mixed neodymium iron boron powder into a non-magnetic conductive box body 1 coated with non-stick coating, applying pressure, and sealing to obtain a combination of the neodymium iron boron and the non-magnetic conductive box body 1;
and step six, sintering, namely conveying the combined body into a sintering furnace for sintering to obtain a sintered neodymium iron boron blank connected with the partition plate 2.
When preparing the sintered neodymium iron boron blank, send the neodymium iron boron material into the fritting furnace with non-magnetic conduction box body 1 together, rather than separating the neodymium iron boron material after the shaping from non-magnetic conduction box body 1 and sintering, help reducing the defective rate of sintered product.
The third concrete implementation mode: this embodiment is further defined by the second embodiment, wherein the fifth forming step comprises:
coating: uniformly coating a layer of non-stick paint on the inner surfaces of the non-magnetic box body 1 and the cover plate 4, and installing the partition plates 2 on the non-magnetic box body 1 in sequence after the non-stick paint is dried;
filling: putting the weighed neodymium iron boron powder into the cavity 3;
profiling: pressing the neodymium iron boron powder to obtain a neodymium iron boron green blank meeting the requirements;
and (4) capping: and buckling the cover plate 4 on the non-magnetic conduction box body 1, and wrapping the neodymium iron boron green body in an all-dimensional manner to obtain a combined body.
Through applying paint with a brush and not being stained with, make neodymium iron boron material can not take place to tie with non-magnetic conduction box body 1 when sintering, conveniently take out the neodymium iron boron blank in non-magnetic conduction box body 1 behind the sintering process, set up apron 4 and seal non-magnetic conduction box body 1, restriction neodymium iron boron deformation takes place.
The fourth concrete implementation mode: the second embodiment is further limited by the second embodiment, the slot 12 is disposed at the center of the bottom plate of the non-magnetic box body 1, the slots 11 are symmetrically disposed on the front and rear side plates of the non-magnetic box body 1, the slots 11 and 12 respectively correspond to the partition plate 2 and the insertion post 42, and the non-magnetic material is used to avoid interference on the internal neodymium iron boron, thereby facilitating separation.
The fifth concrete implementation mode: the fourth embodiment is further limited by the fourth embodiment, as shown in fig. 5, the partition plate 2 is in a convex structure rotating one hundred eighty degrees, upper portions of two side edges of the partition plate 2 extend outwards to form a fixture block 22, a circular hole is formed in one side surface of the partition plate 2, a convex nail 21 is arranged in the circular hole, the partition plate 2 partitions the inner cavity 13 of the non-magnetic-conductive box body 1 to form a plurality of cavities 3, the partition plate 2 partitions the small cavities 3 to achieve a cutting effect, and workload of a subsequent cutting step is reduced.
The sixth specific implementation mode: the fifth embodiment is further limited to the fifth embodiment, the cavity 3 is filled with neodymium iron boron powder, the size of the cavity 3 is smaller than that of the inner cavity 13, and the cavity 3 is matched with the partition plate 2 for use, so that each sintered neodymium iron boron blank is connected with the corresponding partition plate 2.
The seventh embodiment: the fourth specific embodiment of the present invention is further limited in that the top end of the insert post 42 is connected to the bottom surface of the cover plate 4, press blocks 41 are disposed on the bottom surface of the cover plate 4 at equal intervals, the press blocks 41 correspond to the cavities 3 one to one, the insert post 42 and the cover plate 4 have a pressing effect on the neodymium iron boron in the cavities 3, and the tightness of connection between the neodymium iron boron and the partition plate 2 is enhanced.
The specific implementation mode is eight: the second embodiment is further limited to the second embodiment, the non-stick coating is used for preventing the sintered neodymium iron boron from being connected with the non-magnetic conductive box body 1 in a high-temperature environment, the coating operation is performed when the non-magnetic conductive box body 1 is used for the first time, and the coating operation does not need to be performed again every time the non-magnetic conductive box body 1 is processed.
The specific implementation method nine: the fifth embodiment is further limited by the fifth embodiment, the protruding nail 21 is used for connecting the sintered nd-fe-b with the partition plate 2, the protruding nail 21 is formed by injecting a molten material into a round hole on the partition plate 2, and the connecting is performed during the sintering process and the separation is performed during the heat treatment process without adding an additional step.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The production and processing technology for the sintered NdFeB workpiece is characterized by comprising the following steps of:
s1, cutting the sintered neodymium iron boron blank to obtain a sintered neodymium iron boron sheet;
s2, carrying out surface treatment on the sintered neodymium iron boron sheet, wherein the surface treatment comprises end face grinding and dysprosium-infiltrated slurry coating;
s3, conveying the sintered NdFeB sheet coated with the coating on the surface into a sintering furnace, performing heat treatment, completing dysprosium infiltration treatment, and simultaneously separating the sintered NdFeB semi-finished product and the partition plate (2);
s4, mechanically processing the separated sintered neodymium iron boron semi-finished product to obtain a sintered neodymium iron boron workpiece with a shape and a size meeting the production requirements;
and S5, coating the sintered NdFeB workpiece.
2. The production and processing technology of the sintered NdFeB workpiece as claimed in claim 1, wherein the preparation of the sintered NdFeB blank in S1 comprises the following steps:
the first step batching, the raw materials for producing sintered neodymium iron boron work piece include: weighing various raw materials according to the proportion, wherein the raw materials comprise rare earth metal neodymium, metal element iron, nonmetal element boron and the like;
secondly, smelting a casting sheet, melting the prepared raw materials into alloy liquid and casting the alloy liquid into a sheet;
thirdly, performing hydrogen crushing, namely crushing the neodymium iron boron alloy sheet in a hydrogen environment to obtain neodymium iron boron crushed material;
fourthly, airflow milling to prepare powder, namely adding the crushed neodymium iron boron into an airflow mill, further crushing to obtain neodymium iron boron powder, and mutually colliding and fusing the powder in a high-pressure airflow environment;
fifthly, forming, namely filling the mixed neodymium iron boron powder into a non-magnetic conductive box body (1) coated with non-stick coating, applying pressure, and sealing to obtain a combination of the neodymium iron boron and the non-magnetic conductive box body (1);
and step six, sintering, namely conveying the combined body into a sintering furnace for sintering to obtain a sintered neodymium iron boron blank connected with the partition plate (2).
3. The production and processing technology of the sintered neodymium-iron-boron workpiece according to claim 2, wherein the fifth step of forming comprises the following steps:
coating: uniformly coating a layer of non-stick paint on the inner surfaces of the non-magnetic box body (1) and the cover plate (4), and installing the partition plates (2) on the non-magnetic box body (1) in sequence after the non-stick paint is dried;
filling: putting the weighed neodymium iron boron powder into the cavity (3);
profiling: pressing the neodymium iron boron powder to obtain a neodymium iron boron green blank meeting the requirements;
and (4) capping: and buckling the cover plate (4) on the non-magnetic conduction box body (1), and wrapping the neodymium iron boron green body in an all-dimensional manner to obtain a combined body.
4. The production and processing technology of the sintered neodymium-iron-boron workpiece according to claim 2, characterized in that: the magnetic separation type non-magnetic-conduction box is characterized in that a slot (12) is formed in the center of a bottom plate of the non-magnetic-conduction box body (1), clamping grooves (11) are symmetrically formed in the front side plate and the rear side plate of the non-magnetic-conduction box body (1), and the clamping grooves (11) and the slot (12) correspond to the partition plate (2) and the inserting column (42) respectively.
5. The production and processing technology of the sintered NdFeB workpiece according to claim 4, characterized in that: the separation plate (2) is a convex structure capable of rotating one hundred eighty degrees, the upper parts of two side edges of the separation plate (2) extend outwards to form clamping blocks (22), a round hole is formed in one side face of the separation plate (2), a convex nail (21) is arranged in the round hole, and the separation plate (2) is used for separating an inner cavity (13) of the non-magnetic-conduction box body (1) to form a plurality of cavities (3).
6. The production and processing technology of the sintered NdFeB workpiece according to claim 5, characterized in that: the neodymium iron boron powder is filled in the cavity (3), and the size of the cavity (3) is smaller than that of the inner cavity (13).
7. The production and processing technology of the sintered NdFeB workpiece according to claim 4, characterized in that: the top end of the inserted column (42) is connected with the bottom surface of the cover plate (4), pressing blocks (41) are arranged on the bottom surface of the cover plate (4) at equal intervals, and the pressing blocks (41) correspond to the cavities (3) one to one.
8. The production and processing technology of the sintered neodymium-iron-boron workpiece according to claim 2, characterized in that: the non-stick coating is used for preventing the sintered neodymium iron boron from being connected with the non-magnetic conduction box body (1) in a high-temperature environment.
9. The production and processing technology of the sintered NdFeB workpiece according to claim 5, characterized in that: the convex nail (21) is used for connecting the sintered neodymium iron boron and the partition plate (2).
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