CN203481039U - Sintering box for preparing spliced and sintered neodymium-iron-boron permanent magnet blank - Google Patents
Sintering box for preparing spliced and sintered neodymium-iron-boron permanent magnet blank Download PDFInfo
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- CN203481039U CN203481039U CN201320551855.4U CN201320551855U CN203481039U CN 203481039 U CN203481039 U CN 203481039U CN 201320551855 U CN201320551855 U CN 201320551855U CN 203481039 U CN203481039 U CN 203481039U
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- graphite
- box
- sintering
- connecting sleeve
- permanent magnet
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Abstract
The utility model relates to a sintering box for preparing a spliced and sintered neodymium-iron-boron permanent magnet blank. The sintering box comprises a graphite bottom box, a graphite connecting sleeve and a graphite upper box body. According to the structure, the graphite bottom box makes contact with the lower edge of the graphite connecting sleeve, the graphite upper box body makes contact with the upper edge of the graphite connecting sleeve, and therefore a sintering box chamber is formed; meanwhile, the graphite upper box body is tightly connected with the upper edge of the graphite connecting sleeve, and the graphite bottom box is tightly connected with the lower edge of the graphite connecting sleeve; an open pore is arranged at the center position of each of four side walls of the graphite connecting sleeve. The sintering box has the advantages that a sintering basin combination structure is adopted, that is a common iron sintering box is replaced by novel graphite boxes made of high-purity materials; specially, the two graphite boxes made of the high-purity materials are matched with the graphite connecting sleeve which is made of the high-purity materials and provided with the pores; meanwhile, the open pores are formed in appropriate positions on the four outer walls of the connecting sleeve, as a result, the problem that the joint of a product cracks in the oxidization process and the sintering contraction process before the product enters a furnace for sintering is solved beneficially, and the production cost is lowered at the same time.
Description
Technical field
The utility model relates to sintered Nd-Fe-B permanent magnetic material sintering technology, relates in particular to a kind of sintering box splicing in the preparation of sintered NdFeB permanent magnet blank.
Background technology
Neodymium iron boron is one of main raw material(s) of manufacturing environmental protection and energy saving product, and as the application of neodymium iron boron in fields such as automobile, compressor, wind-driven generators, neodymium iron boron is as the functional material of environmental protection and energy saving, and its application will be more extensive, just become brand-new environmental protection industry.Sintered Nd-Fe-B permanent magnetic material is the strongest magnetic material of current magnetic, extensive use electromagnetism, electroacoustic, magnetic force, the fields such as nuclear-magnetism and electronics accelerated luminescence, conventionally first making sintered NdFeB is placed on vacuum electromagnetic induction furnace melting raw material and pours into ingot casting or rapid-hardening flake, then to ingot casting Mechanical Crushing or the broken meal of making of rapid-hardening flake hydrogen, meal accelerates through gases at high pressure, collide each other and form fine powder, these neodymium iron boron fine powders are pressed into green compact under electromagnetic induction alignment magnetic field in certain die cavity, green compact proceed to degassed in vacuum furnace and form fine and close block at soak sintering after waiting static pressure, afterwards, the neodymium iron boron sintering into adopts the machining modes such as wheel grinding, the cutting of diamond metal sheet, spark cutting or punching, processes various shapes, last surface treatment.But, bulk docking product is due to its product docking particularity, on putting, sintering also there are certain requirements (docking product upper-lower position is put), product is in sintering desaeration process, because product is fine and close, shrinks and have a large amount of gas to emit simultaneously, if sintering box sealing at that time, gas cannot be taken away by vacuum pump in time, and product there will be cracking phenomena at interface; If sintering basin seals not, before directly entering sintering furnace, unlimited mode is easy to contact with air, and product is oxidized.Therefore,, for above aspect, need to reasonably improve prior art.
Utility model content
For above defect, the utility model provides a kind of problem that solves joint product cracking, reduce production costs simultaneously, can improve technology stability, guarantee the sintering box in the preparation of the consistent splicing sintered NdFeB permanent magnet blank of performance, to solve many deficiencies of prior art.
For achieving the above object, the utility model is by the following technical solutions:
Splice the sintering box in sintered NdFeB permanent magnet blank preparation, comprise box at the bottom of graphite, joining of graphite cover and graphite upper cartridge body.At the bottom of described graphite, box contacts with joining of graphite cover lower limb, and graphite upper cartridge body and joining of graphite put EDGE CONTACT, thereby form a sintering box chamber; Meanwhile, on graphite, at the bottom of box and graphite, box puts lower limb with joining of graphite and is closely connected.The center position of four side wall surfaces of described joining of graphite cover respectively arranges a perforate.
At the bottom of described graphite upper cartridge body and graphite, box is rectangular structure and the length of the two difference correspondent equal.
The beneficial effect of the sintering box in splicing sintered NdFeB permanent magnet blank preparation described in the utility model is: by adopting sintering basin combining structure, with novel high-purity material graphite, substitute common iron sintering box, be specially with two high-purity material graphites and coordinate with the joining of graphite cover of a high-purity material punching, in four outside wall surface appropriate positions of adapter sleeve, perforate is set simultaneously, thereby be conducive to solve the contradiction that product sintering enters joint product cracking in stokehold oxidation and sintering shrinkage process, reduced production cost simultaneously.
Accompanying drawing explanation
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the decomposition texture schematic diagram that splices the sintering box in the preparation of sintered NdFeB permanent magnet blank described in the utility model embodiment;
Fig. 2 is the sintering box inner surface structure schematic diagram splicing described in the utility model embodiment in the preparation of sintered NdFeB permanent magnet blank.
In figure:
1, box at the bottom of graphite; 2, graphite upper cartridge body; 3, joining of graphite cover; 4, perforate; 5, sintering box chamber.
Embodiment
As shown in Figure 1-2, sintering box in splicing sintered NdFeB permanent magnet blank preparation described in the utility model embodiment, comprise box 1 at the bottom of graphite, at the bottom of described graphite, box 1 top installation joining of graphite cover 3 installation graphite upper cartridge bodies 2 and these graphite upper cartridge body 2 shape sizes are identical with box at the bottom of graphite 1, wherein at the bottom of graphite, box 1 overlaps 3 lower limbs with joining of graphite and contacts, graphite upper cartridge body 2 overlaps 3 native EDGE CONTACT with joining of graphite, thereby the volume that forms a sintering box chamber 5 and this sintering box chamber 5 equals box 1 at the bottom of graphite, joining of graphite cover 3 and graphite upper cartridge body 2 three's volume sums, meanwhile, at the bottom of graphite soil box body 2 and graphite, box 1 is closely connected with lower limb on joining of graphite cover 3 respectively.The center position of four side wall surfaces of described joining of graphite cover 3 respectively arranges a perforate 4.
Above embodiment is more preferably embodiment a kind of of the utility model, and the common variation that those skilled in the art carry out within the scope of the technical program and replacing should be included in protection range of the present utility model.
Claims (2)
1. splice the sintering box in sintered NdFeB permanent magnet blank preparation, comprise box (1) at the bottom of graphite, it is characterized in that:
Box at the bottom of described graphite (1) contacts with joining of graphite cover (3) lower limb, the contacting with joining of graphite cover (3) top edge of graphite upper cartridge body (2), thus form a sintering box chamber (5);
Meanwhile, at the bottom of graphite upper cartridge body (2) and graphite, box (1) is closely connected with the upper lower limb of joining of graphite cover (3); The center position of four side wall surfaces of described joining of graphite cover (3) respectively arranges a perforate (4).
2. the sintering box in splicing sintered NdFeB permanent magnet blank preparation according to claim 1, is characterized in that: described graphite upper cartridge body (2) is rectangular structure and the length of the two difference correspondent equal with box (1) at the bottom of graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551855.4U CN203481039U (en) | 2013-09-06 | 2013-09-06 | Sintering box for preparing spliced and sintered neodymium-iron-boron permanent magnet blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551855.4U CN203481039U (en) | 2013-09-06 | 2013-09-06 | Sintering box for preparing spliced and sintered neodymium-iron-boron permanent magnet blank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203481039U true CN203481039U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320551855.4U Expired - Lifetime CN203481039U (en) | 2013-09-06 | 2013-09-06 | Sintering box for preparing spliced and sintered neodymium-iron-boron permanent magnet blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203481039U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI573642B (en) * | 2016-04-07 | 2017-03-11 | 中國鋼鐵股份有限公司 | Sintering container of ndfeb magnet and sintering method thereof |
| CN108326308A (en) * | 2017-12-25 | 2018-07-27 | 杭州铭赫科技有限公司 | A kind of hollow and thin-walled structural metal powder fission injection moulding splicing sintering method |
| 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 |
| CN114309601A (en) * | 2022-01-26 | 2022-04-12 | 江苏南方永磁科技有限公司 | Transportation transfer device and transportation method for sintered neodymium iron boron formed blank |
-
2013
- 2013-09-06 CN CN201320551855.4U patent/CN203481039U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI573642B (en) * | 2016-04-07 | 2017-03-11 | 中國鋼鐵股份有限公司 | Sintering container of ndfeb magnet and sintering method thereof |
| CN108326308A (en) * | 2017-12-25 | 2018-07-27 | 杭州铭赫科技有限公司 | A kind of hollow and thin-walled structural metal powder fission injection moulding splicing sintering method |
| 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 |
| CN114309601A (en) * | 2022-01-26 | 2022-04-12 | 江苏南方永磁科技有限公司 | Transportation transfer device and transportation method for sintered neodymium iron boron formed blank |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
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| CX01 | Expiry of patent term |