CN105903957A - Blank charging box for neodymium iron boron magnet - Google Patents
Blank charging box for neodymium iron boron magnet Download PDFInfo
- Publication number
- CN105903957A CN105903957A CN201610336098.7A CN201610336098A CN105903957A CN 105903957 A CN105903957 A CN 105903957A CN 201610336098 A CN201610336098 A CN 201610336098A CN 105903957 A CN105903957 A CN 105903957A
- Authority
- CN
- China
- Prior art keywords
- magazine
- iron boron
- neodymium iron
- compression spring
- connecting shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F2003/1042—Sintering only with support for articles to be sintered
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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)
- Mechanical Engineering (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
Abstract
The invention discloses a blank charging box for a neodymium iron boron magnet, belongs to a material utilizing box for bonding of the neodymium iron boron magnet in the technical field of magnets, and aims at providing the blank charging box for the neodymium iron boron magnet. The blank charging box comprises a material box body, a connecting shaft and a material box cover. The interior of the material box body is divided into a plurality of blank containing cavities, and transverse partition plates are higher than vertical partition plates. The connecting end of the material box cover is located in an installing groove of the material box body, and the cylindrical face of the material box cover is attached to the arc face of the material box body. A partition plate in the material box cover divides an inner cavity of the material box cover into a left cavity and a right cavity. The two ends of the connecting shaft penetrate the left cavity of the material box cover and then are connected with the material box body. A compression spring and a fixing base are arranged in the right cavity. One end of the compression spring is pressed on the partition plate, and the other end of the compression spring is connected with the fixing base. The fixing base is connected with an elastic rope, the other end of the elastic rope sequentially penetrates the compression spring and the partition plate and then is connected to the connecting shaft in a winding manner, and the tail end of the elastic rope and the connecting shaft are fixedly connected.
Description
Technical field
The invention belongs to magnet technology field, relate to a kind of neodymium iron boron magnetic body, particularly relate to a kind of neodymium iron boron magnetic body bonding use magazine.
Background technology
Neodymium iron boron magnetic body is to the permanent magnet so far with the strongest magnetic force, and it is divided into Agglutinate neodymium-iron-boron and sintered NdFeB two kinds.Agglutinate neodymium-iron-boron is actually injection mo(u)lding, and sintered NdFeB is evacuation and passes through high-temperature heating molding.
Either Agglutinate neodymium-iron-boron or sintered NdFeB; all would generally use magazine; neodymium iron boron green compact are placed in magazine, then cover magazine lid, be together delivered to the neodymium iron boron green compact in magazine and magazine in sintering furnace be sintered or be delivered to specifying position to carry out bonding.But, the magazine overwhelming majority commonly known in the art includes the magazine lid that body and lid are located in body, body is made up of cassette bottom and framework and is split-type structural, in use, first being placed in back box by framework, the lower limb of framework is relative with the edge of cassette bottom, then puts into neodymium iron boron green compact in son framework, then cover magazine lid, be finally transported to sintering center and be sintered.But, owing to magazine is split-type structural, sealing effectiveness is not fine, and neodymium iron boron green compact easily aoxidize in transportation, affects the performance of neodymium iron boron magnetic body.
For this, the patent of invention of Application No. 201220537436.0 discloses a kind of green compact magazine for neodymium iron boron magnetic body, it includes body and the magazine lid being covered in this body, described body is by cassette bottom and is trapped among the box wall at this cassette bottom edge and forms, described cassette bottom is one-body molded with box wall, described body and magazine lid are made by Graphene, and the bottom surface of cassette bottom is convexly equipped with boss.This is formed in one by cassette bottom and the box wall of magazine, without simple in construction, and good seal performance, and interior inflated with nitrogen, so that it is guaranteed that neodymium iron boron will not be oxidized.Owing to body and magazine lid are supported by Graphene so that this with the light weight of magazine, high temperature resistant, intensity is high, be unlikely to deform so that neodymium iron boron has good quality and overall dimensions, qualification rate is high；And the bottom surface of cassette bottom is provided with boss, it is simple to place.
Due to this with magazine in use, magazine lid is covered in this body, in the transportation of neodymium iron boron green compact, because shake easily makes to there is gap between magazine lid and body, it is not fine for causing with the sealing effectiveness of magazine, finally affects the performance of neodymium iron boron magnetic body.
Summary of the invention
The goal of the invention of the present invention is: the problem existed for prior art, there is provided a kind of sealing effectiveness preferably for the green compact magazine of neodymium iron boron magnetic body, effectively prevent from, because shake produces gap between magazine lid and body, improving the performance of bonding neodymium iron boron magnetic body out.
To achieve these goals, the technical solution used in the present invention is:
A kind of green compact magazine for neodymium iron boron magnetic body, including body, connecting shaft, magazine lid, the inside of described body is separated into some green compact placed cavities by diaphragm plate, vertical clapboard, and the top of described diaphragm plate is higher than the top of vertical clapboard；The top connecting sidewall of described body offers mounting groove, and the end that connects of described magazine lid is positioned at the arc surface laminating of the mounting groove of body, the cylinder of described magazine lid and body；It is provided with demarcation strip in described magazine lid, the inner chamber of magazine lid is divided into left chamber and right chamber by described demarcation strip, the two ends of described connecting shaft are connected with body after the left chamber of magazine lid, compression spring and fixing seat it is provided with in described right chamber, described compression spring one end is pressed on demarcation strip, the described compression spring other end is connected with fixing seat, flexible rope is connected on described fixing seat, the other end of described elastic threads sequentially pass through compression spring, demarcation strip after around being connected on connecting shaft, and the end of elastic threads and connecting shaft are fixing is connected.
Wherein, the end face of the connection opposite of described body is less than remaining side of body, the end face of remaining side of body is the most concordant, and the difference in height of the end face of remaining side of the end face of the connection opposite of described body and body is equal to the thickness of magazine lid.
Wherein, the bottom of described body is at least provided with two-layer ladder.
Wherein, the bottom of described green compact placed cavity is coated with one layer of rare earth oxide bisque, and described rare earth oxide bisque is yittrium oxide bisque.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, in the present invention, body is connected by connecting shaft with magazine lid, magazine lid body where rotates, it is achieved with being turned on and off of magazine, consequently facilitating be removed or placed into neodymium iron boron green compact in magazine；；When magazine lid is connected with body, the arc surface laminating of the cylinder of magazine lid and body, and when rotating magazine lid, cylinder is still fitted with arc surface, will not produce gap, thus improve by the sealing property of magazine；Demarcation strip, compression spring, fixing seat and elastic threads are set in the cavity of magazine lid, when magazine lid is closed, this compression spring is at compressive state, when opening magazine lid, more elastic threads is wrapped in connecting shaft, compression spring is compressed further, and elastic force increases, and forces magazine lid to reset rapidly and closedown magazine；Owing to when magazine lid is closed, compression spring is at compressive state, thus opening it with the course of conveying of magazine is difficult to, even if after opening it, compression spring is compressed further, elastic force increases such that it is able to promote magazine lid reset rapidly and close out magazine, preferable with the sealing effectiveness of magazine, effectively prevent from, because shake produces gap between magazine lid and body, improving the performance of bonding neodymium iron boron magnetic body out.
2, in the present invention, the connection opposite of body is set below remaining side of body, remaining side of body is concordant, and the difference in height of the end face of remaining side with body of the end face of the connection opposite of body is equal to the thickness of magazine lid, thus when closing magazine lid, three sides of magazine lid all with contacts side surfaces, the sealing of body such that it is able to be effectively improved by the sealing property of magazine, improve the performance of bonding neodymium iron boron magnetic body out.
3, in the present invention, the bottom of body is at least provided with two-layer ladder, when putting in bonding apparatus with magazine, and the correspondence position that the ladder in materials cassette bottom portion can facilitate, be placed in bonding apparatus to express delivery, the service efficiency of raising magazine.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
State diagram when Fig. 2 is that in the present invention, magazine lid is opened；
Fig. 3 is the partial schematic diagram of magazine lid in the present invention；
Fig. 4 is the structural representation of body in the present invention
Fig. 5 is the partial schematic diagram of body in the present invention；
Fig. 6 is body and the connection diagram of magazine lid in the present invention；
Fig. 7 is the Fig. 6 state diagram when opening magazine lid；
Wherein, reference is: 1 magazine lid, 2 body, 3 connecting shafts, 11 right chambers, 12 fix seat, 13 compression springs, 14 elastic threads, 15 demarcation strips, 16 left chamber, 17 cylinders, 21 mounting grooves, 22 arc surfaces, 23 ladders, 24 connect opposite, 25 diaphragm plates, 26 vertical clapboards, 27 green compact placed cavities.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of green compact magazine for neodymium iron boron magnetic body, this includes body 2, connecting shaft 3 and magazine lid 1 with magazine, and this body 2 is connected by connecting shaft 3 with magazine lid 1 so that magazine lid 1 can be freely rotatable in body 2, it is achieved with unlatching or the tube wall of magazine.This body 2 be internally provided with some diaphragm plate 25, midfeather 26, this diaphragm plate 25 is set to many groups, and many group diaphragm plates 25 are equidistantly horizontally installed on the inside of body 2；This midfeather 26 is set to many groups, and many group midfeathers 26 are equidistantly disposed longitudinally on the inside of body 2.The inside of body 2 is separated into some green compact placed cavities 27 in array distribution by the diaphragm plate 25 of crisscross setting, midfeather 26.Additionally, this body 2 is internal, the top of diaphragm plate 25 is higher than the top of vertical clapboard 26, thus two groups, adjacent left and right green compact placed cavity 27 will be connected by the gap between magazine lid 1 with midfeather 26, consequently facilitating the circulation of heat.The top connecting sidewall of this body 2 offers mounting groove 21, vertical line segment that the cross section of this mounting groove 21 includes being sequentially connected with, 1/4 arc section and line segment anyhow.The connection end of this magazine lid 1 is the face of cylinder 17, during installation, the end that connects of magazine lid 1 is positioned at the mounting groove 21 of body 2, and 1/4 arc section of the face of cylinder 17 of magazine lid 1 and the mounting groove 21 of body 2 fits, and will fit both when rotating magazine lid 1, thus improve by the sealing property of magazine.
It is provided with demarcation strip 15 in this magazine lid 1, the lumen segmentation of magazine lid 1 is left chamber 16 and right chamber 11 by demarcation strip 15, these connecting shaft 3 two ends are connected through fixing with body 2 after the left chamber 16 of magazine lid 1, magazine lid 1 is when rotating relative to body 2, connecting shaft 3 will not rotate, and be only that the magazine lid 1 being set in connecting shaft 3 rotates.Being provided with compression spring 13 and fixing seat 12 in the right chamber 11 of this magazine lid 1, one end of compression spring 13 is pressed on demarcation strip 15, and the other end of compression spring 13 is connected with fixing seat 12；Flexible rope 14 is connected near the side of compression spring 13 on this fixing seat 12, one end of this elastic threads 14 is fixedly connected on fixing seat 12, the other end of this elastic threads 14 enters in left chamber 16 after sequentially passing through the through hole on the centrage of compression spring 13, demarcation strip 15, elastic threads 14 in left chamber 16 is directly around being connected in connecting shaft 3, and the end of elastic threads 14 is directly fixedly connected in connecting shaft 3, after making to open magazine lid 1, more elastic threads 14 will be around being connected in connecting shaft 3.
Body 2 and magazine lid 1 is connected by connecting shaft 3, magazine lid 1 body 2 where rotates, it is achieved with being turned on and off of magazine, consequently facilitating be removed or placed into neodymium iron boron green compact in magazine；When magazine lid 1 is connected with body 2, the cylinder 17 of magazine lid 1 is fitted with the arc surface 22 of body 2, and cylinder 17 is still fitted with arc surface 22 when rotating magazine lid 1, will not produce gap, thus improve by the sealing property of magazine；Demarcation strip 15, compression spring 13, fixing seat 12 and elastic threads 14 are set in the cavity of magazine lid 1, when magazine lid 1 is closed, this compression spring 13 is at compressive state, when opening magazine lid 1, more elastic threads 14 is wrapped in connecting shaft 3, compression spring 13 is compressed further, and elastic force increases, and forces magazine lid 1 to reset rapidly and closedown magazine；Owing to when magazine lid 1 is closed, compression spring 13 is at compressive state, thus opening it with the course of conveying of magazine is difficult to, even if after opening it, compression spring 13 is compressed further, elastic force increases such that it is able to promote magazine lid 1 reset rapidly and close out magazine, preferable with the sealing effectiveness of magazine, effectively prevent from, because shake produces gap between magazine lid 1 and body 2, improving the performance of bonding neodymium iron boron magnetic body out.
In order to improve by the sealing property of magazine, and make in being closed more attractive in appearance with magazine, thus the end face of the connection opposite 24 of this body 2 is set below remaining side of body 2, and the end face of remaining side of body 2 is all generally flush with.Additionally, the end face of the connection opposite 24 of this this body 2 is set to equal with the thickness of magazine lid 1 with the difference in height of the end face of remaining side of body 2, thus when closedown magazine, the either flush of the side of the end face of magazine lid 1 and body 2.
The connection opposite 24 of body 2 is set below remaining side of body 2, remaining side of body 2 is concordant, and the difference in height of the end face of remaining side with body 2 of the end face of the connection opposite 24 of body 2 is equal to the thickness of magazine lid 1, thus when closing magazine lid 1, three sides of magazine lid 1 all with contacts side surfaces, the sealing of body 2, it is thus possible to be effectively improved by the sealing property of magazine, improve the performance of bonding neodymium iron boron magnetic body out.
For the ease of being positioned in bonding apparatus with magazine, thus in the bottom of body 2 at least provided with two-layer ladder 23.The bottom of body 2 is at least provided with two-layer ladder 23, when putting in bonding apparatus with magazine, and the correspondence position that the ladder 23 in materials cassette bottom portion can facilitate, be placed in bonding apparatus to express delivery, the service efficiency of raising magazine.
Additionally, be coated with one layer of rare earth oxide bisque in the bottom of green compact placed cavity 27, this rare earth oxide bisque is yittrium oxide bisque.
Embodiment 1
A kind of green compact magazine for neodymium iron boron magnetic body, including body 2, connecting shaft 3, magazine lid 1, the inside of described body 2 is separated into some green compact placed cavities 27 by diaphragm plate 25, vertical clapboard 26, and the top of described diaphragm plate 25 is higher than the top of vertical clapboard 26；The top connecting sidewall of described body 2 offers mounting groove 21, and the end that connects of described magazine lid 1 is positioned at the mounting groove 21 of body 2, and the cylinder 17 of described magazine lid 1 is fitted with the arc surface 22 of body 2；It is provided with demarcation strip 15 in described magazine lid 1, the inner chamber of magazine lid 1 is divided into left chamber 16 and right chamber 11 by described demarcation strip 15, the two ends of described connecting shaft 3 are connected with body 2 after the left chamber 16 of magazine lid 1, compression spring 13 and fixing seat 12 it is provided with in described right chamber 11, described compression spring 13 one end is pressed on demarcation strip 15, described compression spring 13 other end is connected with fixing seat 12, flexible rope 14 is connected on described fixing seat 12, the other end of described elastic threads 14 sequentially passes through compression spring 13, around being connected on connecting shaft 3 after demarcation strip 15, and the end of elastic threads 14 and connecting shaft 3 is fixing is connected.
Embodiment 2
On the basis of embodiment one, the end face of the connection opposite 24 of described body 2 is less than remaining side of body 2, the end face of remaining side of body 2 is the most concordant, and the difference in height of the end face of remaining side of the end face of the connection opposite 24 of described body 2 and body 2 is equal to the thickness of magazine lid 1.
Embodiment 3
On the basis of embodiment one or embodiment two, the bottom of described body 2 is at least provided with two-layer ladder 23.
Embodiment 4
On the basis of above-described embodiment, the bottom of this green compact placed cavity 27 is coated with one layer of rare earth oxide bisque, and this rare earth oxide bisque is yittrium oxide bisque.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (4)
1. the green compact magazine for neodymium iron boron magnetic body, including body (2), connecting shaft (3), magazine lid (1), it is characterized in that: the inside of described body (2) is separated into some green compact placed cavities (27) by diaphragm plate (25), vertical clapboard (26), and the top of described diaphragm plate (25) is higher than the top of vertical clapboard (26)；The top connecting sidewall of described body (2) offers mounting groove (21), the connection end of described magazine lid (1) is positioned at arc surface (22) laminating of the mounting groove (21) of body (2), the cylinder (17) of described magazine lid (1) and body (2)；nullIt is provided with demarcation strip (15) in described magazine lid (1)，The inner chamber of magazine lid (1) is divided into left chamber (16) and right chamber (11) by described demarcation strip (15)，The two ends of described connecting shaft (3) are connected with body (2) afterwards through the left chamber (16) of magazine lid (1)，Compression spring (13) and fixing seat (12) it is provided with in described right chamber (11)，Described compression spring (13) one end is pressed on demarcation strip (15)，Described compression spring (13) other end is connected with fixing seat (12)，Described fixing seat (12) is upper connects flexible rope (14)，The other end of described elastic threads (14) sequentially passes through compression spring (13)、Around being connected on connecting shaft (3) after demarcation strip (15)，And the end of elastic threads (14) and connecting shaft (3) are fixing is connected.
A kind of green compact magazine for neodymium iron boron magnetic body, it is characterized in that: the end face of the connection opposite (24) of described body (2) is less than remaining side of body (2), the end face of remaining side of body (2) is the most concordant, and the difference in height of the end face of remaining side of the end face of the connection opposite (24) of described body (2) and body (2) is equal to the thickness of magazine lid (1).
A kind of green compact magazine for neodymium iron boron magnetic body, it is characterised in that: the bottom of described body (2) is at least provided with two-layer ladder (23).
A kind of green compact magazine for neodymium iron boron magnetic body, it is characterised in that: the bottom of described green compact placed cavity (27) is coated with one layer of rare earth oxide bisque, and described rare earth oxide bisque is yittrium oxide bisque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336098.7A CN105903957A (en) | 2016-05-20 | 2016-05-20 | Blank charging box for neodymium iron boron magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336098.7A CN105903957A (en) | 2016-05-20 | 2016-05-20 | Blank charging box for neodymium iron boron magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105903957A true CN105903957A (en) | 2016-08-31 |
Family
ID=56749409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610336098.7A Pending CN105903957A (en) | 2016-05-20 | 2016-05-20 | Blank charging box for neodymium iron boron magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105903957A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107472884A (en) * | 2017-08-07 | 2017-12-15 | 上海平野磁气有限公司 | The full-automatic sealed conveying device for piling up magnetic material blank |
| CN110090952A (en) * | 2018-01-28 | 2019-08-06 | 蒋盼盼 | A kind of the dress firing method and device of rare-earth Nd-Fe-B magnet |
| CN113338981A (en) * | 2021-07-14 | 2021-09-03 | 成都未来智隧科技有限公司 | Excavation cutter head of heading machine and heading machine |
-
2016
- 2016-05-20 CN CN201610336098.7A patent/CN105903957A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107472884A (en) * | 2017-08-07 | 2017-12-15 | 上海平野磁气有限公司 | The full-automatic sealed conveying device for piling up magnetic material blank |
| CN107472884B (en) * | 2017-08-07 | 2021-03-19 | 宁波科宁达工业有限公司 | Full-automatic sealed conveying device for stacking magnetic material blanks |
| CN110090952A (en) * | 2018-01-28 | 2019-08-06 | 蒋盼盼 | A kind of the dress firing method and device of rare-earth Nd-Fe-B magnet |
| CN113338981A (en) * | 2021-07-14 | 2021-09-03 | 成都未来智隧科技有限公司 | Excavation cutter head of heading machine and heading machine |
| CN113338981B (en) * | 2021-07-14 | 2024-04-05 | 成都未来智隧科技有限公司 | Development machine excavation cutterhead and development machine |
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Application publication date: 20160831 |