CN215356173U - Material box for sintering neodymium iron boron - Google Patents
Material box for sintering neodymium iron boron Download PDFInfo
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- CN215356173U CN215356173U CN202023134234.5U CN202023134234U CN215356173U CN 215356173 U CN215356173 U CN 215356173U CN 202023134234 U CN202023134234 U CN 202023134234U CN 215356173 U CN215356173 U CN 215356173U
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- wedge
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Abstract
The utility model discloses a material box for sintering neodymium iron boron, which comprises: the box cover is arranged at the top of the box body, the box body is of a hollow square structure, two symmetrical side surfaces or four symmetrical side surfaces of the box body are provided with grooves, and the wedges are in sliding connection with the grooves on the side surfaces of the box body. According to the utility model, the wedge is matched with the groove, and the wedge simply slides to realize the switching of the closed state and the ventilation state of the material box, so that the technical process of transferring a product from the closed material box to the open material box in the conventional process is reduced, the labor intensity is obviously reduced, and the production efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of powder metallurgy, and particularly relates to a material box for sintering neodymium iron boron.
Background
According to the nucleation theory of the sintered neodymium iron boron, the coercive force of the neodymium iron boron is closely related to the microstructure and the grain boundary phase composition of the neodymium iron boron. In order to obtain the ideal microstructure, the neodymium iron boron is usually subjected to a heat treatment process of secondary aging and rapid quenching cooling. A large number of tests show that the cooling speed of the neodymium iron boron in the rapid quenching cooling process has great influence on the coercive force of the neodymium iron boron, and the improvement of the cooling speed is beneficial to the improvement of the coercive force and consistency of the magnet.
In actual production, neodymium iron boron is usually placed in a material box in the sintering process, and a plurality of material box laminates are placed in a vacuum sintering furnace through a molybdenum bracket to be sintered and thermally treated. Because sintered neodymium iron boron is easily polluted by sintering atmosphere in the high-temperature sintering process, a material box with good tightness is generally required to be used. In order to obtain a quick cooling effect in the heat treatment process, the neodymium iron boron product needs to be transferred from the closed material box to the open material box, so that the labor intensity is greatly increased, and the working efficiency is reduced. An open sintering material box for sintered neodymium iron boron and a using method (ZL201610521130.9) thereof disclose an open sintering material box, which realizes the opening of the box by designing through holes and sealing tin foil and then melting the tin foil at high temperature, and provides a good idea for improving the cooling speed of the sintered neodymium iron boron. However, tinfoil is a disposable consumable, which increases costs and the process flow. Meanwhile, the melting point of the tinfoil is low, the product is exposed in a sintering atmosphere above the melting point of the tinfoil, and the product is easily polluted by the sintering atmosphere in a high-temperature sintering process to cause oxidation of the product and damage of magnetic performance.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a material box for sintering neodymium iron boron, which can solve the problem that a sintering material box in the prior art is not closed.
The utility model provides a material box for sintered neodymium iron boron, which comprises a box cover, a box body and a wedge, wherein the box cover is arranged at the top of the box body, the box body is of a hollow tetragonal structure, two symmetrical side surfaces or four symmetrical side surfaces of the box body are provided with grooves, and the wedge is in sliding connection with the grooves on the side surfaces of the box body.
Preferably, the grooves are provided with through holes A which are horizontally arranged and uniformly distributed.
Preferably, the upper end and the lower end of the groove are wedge-shaped.
Preferably, the wedge is provided with through holes B which are horizontally arranged and uniformly distributed, and the diameter of each through hole B is the same as that of the through hole A on the groove.
Preferably, the wedge is shorter than the side groove of the box body.
Preferably, the wedge is trapezoidal in shape.
The utility model has the beneficial effects that:
1. according to the utility model, the wedge is matched with the groove, and the wedge simply slides to realize the switching of the closed state and the ventilation state of the material box, so that the technical process of transferring a product from the closed material box to the open material box in the conventional process is reduced, the labor intensity is obviously reduced, and the production efficiency is improved.
2. The utility model can ensure the cooling speed in the heat treatment process in the ventilation state, thereby improving the coercivity and consistency of the product.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the cassette of the present invention;
FIG. 3 is a front view of the wedge of the present invention;
figure 4 is a left side view of the wedge of the present invention.
In the figure: 1-box cover, 2-box body, 3-through hole A, 4-groove, 5-wedge, 6-through hole B.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Example 1:
as shown in fig. 1 to 4, a sintered nd-fe-b magazine comprises a box cover 1, a box body 2 and a wedge 5, wherein the box cover 1 is arranged at the top of the box body 2, the box cover 1 and the box body 2 are matched with each other to form a closed container, the box body 2 is of a hollow tetragonal structure, two symmetrical side surfaces or four symmetrical side surfaces of the box body 2 are provided with grooves 4, the wedge 5 is in sliding connection with the grooves 4 on the side surfaces of the box body 2, and the wedge 5 can slide left and right in the grooves 4 during use.
Through holes A3 which are uniformly distributed and horizontally arranged are arranged on the groove 4, and the upper end and the lower end of the groove 4 are in a wedge shape; the wedge 5 has a trapezoidal shape so as to be combined with the groove 4.
Through holes B6 are horizontally arranged and uniformly distributed on the wedge 5, and the diameter of the through hole B6 is the same as that of the through hole A3 on the groove 4.
The length of the wedge 5 is shorter than that of the side groove 4 of the box body, when the wedge 5 is arranged at one end of the box body 2, the through holes B6 on the wedge 5 are completely staggered with all the through holes A3 arranged on the side groove 4 of the box body 2, so that the material box is wholly sealed; when the wedge 5 is arranged at the other end of the box body 2, the through hole B6 on the wedge 5 is completely overlapped with the through hole A3 on the groove 4 on the side surface of the box body 2, so that the magazine has better ventilation effect.
The use method of the material box comprises the following steps:
1. and (3) high-temperature sintering: the sintered neodymium iron boron blank is loaded into a material box, then a wedge on the side surface of the material box is slid to one end, so that a through hole B of the wedge and a through hole A on a groove on the side surface of a box body are in a complete dislocation state, the whole material box is in a closed state, then the material box is put into a vacuum sintering furnace for high-temperature sintering, and after the high-temperature sintering is finished, the material box is quenched to 100 ℃ by inert gas to be discharged.
2. And (3) heat treatment: after the high-temperature sintering is finished and the material box is taken out of the furnace, the wedges on the same side or four surfaces of the box body slide to the other end of the box body along the grooves, so that the through holes B on the wedges are completely overlapped with the through holes A on the grooves on the side surfaces of the box body, at the moment, the material box is in a sealing state, and good air flow convection can be formed through the overlapped through holes. And then putting the product into a vacuum sintering furnace again for secondary heat treatment, and directly filling inert gas and quenching to tapping temperature after the heat treatment is finished.
Claims (6)
1. The utility model provides a sintering is magazine for neodymium iron boron which characterized in that: the box cover comprises a box cover (1), a box body (2) and a wedge (5), wherein the box cover (1) is arranged at the top of the box body (2); the box body (2) is of a hollow tetragonal structure, two symmetrical side surfaces or four symmetrical side surfaces of the box body (2) are provided with grooves (4), and the wedge (5) is in sliding connection with the grooves (4) on the side surfaces of the box body (2).
2. The material box for sintered NdFeB as claimed in claim 1, wherein: the groove (4) is provided with through holes A (3) which are horizontally arranged and uniformly distributed.
3. The material box for sintered NdFeB as claimed in claim 1, wherein: the upper end and the lower end of the groove (4) are wedge-shaped.
4. The material box for sintered NdFeB as claimed in claim 1, wherein: through holes B (6) which are horizontally arranged and uniformly distributed are arranged on the wedge (5), and the diameter of each through hole B (6) is the same as that of the through hole A (3) on the groove (4).
5. The material box for sintered NdFeB as claimed in claim 1 or 4, wherein: the length of the wedge (5) is shorter than that of the groove (4) on the side surface of the box body.
6. The material box for sintered NdFeB as claimed in claim 1 or 4, wherein: the wedge (5) is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023134234.5U CN215356173U (en) | 2020-12-23 | 2020-12-23 | Material box for sintering neodymium iron boron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023134234.5U CN215356173U (en) | 2020-12-23 | 2020-12-23 | Material box for sintering neodymium iron boron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215356173U true CN215356173U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023134234.5U Active CN215356173U (en) | 2020-12-23 | 2020-12-23 | Material box for sintering neodymium iron boron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215356173U (en) |
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2020
- 2020-12-23 CN CN202023134234.5U patent/CN215356173U/en active Active
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