CN203635910U - Sintered NdFeB magnet compacting die - Google Patents
Sintered NdFeB magnet compacting die Download PDFInfo
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- CN203635910U CN203635910U CN201320455043.XU CN201320455043U CN203635910U CN 203635910 U CN203635910 U CN 203635910U CN 201320455043 U CN201320455043 U CN 201320455043U CN 203635910 U CN203635910 U CN 203635910U
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Abstract
The utility model provides a sintered NdFeB magnet compacting die. The phenomenon that diameters of ends of products are different can be improved, rib sizes are reduced, the powder utilizing rate is increased, wear losses are reduced, corner missing of compacted blanks and workblanks is reduced, the post-processing difficulty of centerless grinding and the like is reduced, and one-time yield rate is increased. The sintered NdFeB magnet compacting die has the advantages that due to the adoption of the die for molding, the phenomenon about different diameters of ends of products can be effectively prevented, rib sizes are reduced, the powder utilizing rate is improved and wear losses are reduced, corner missing of the compacted blanks and the workblanks is reduced, the corner missing rate in the post-processing process of centerless grinding and the like is reduced, and the one-time yield rate of magnets is increased; besides, the magnets which are molded by the die are convenient to transport.
Description
Technical field
The utility model belongs to rare earth permanent-magnetic material and manufactures field, specifically a kind of Sintered NdFeB magnet compacting tool set.
Background technology
Neodymium iron boron is prepared the method that adopts powder metallurgy, and the adhesion between magnetic is less, and arrisdefect easily occurs in pressing process; Secondly, neodymium iron boron is fragile material, and arrisdefect also easily occurs the blank after sintering, is unfavorable for the rear processing such as centreless grinding, reduces the disposable yield rate of product; In addition, product fragility is large, easily arrisdefect is also unfavorable for the transportation of product.And the product of existing molding neodymium iron boron mould compacting easily produces concentric reducer phenomenon, not only waste powder, also can aggravate product arrisdefect, increase abrasion, therefore need to set about to reduce arrisdefect rate from mould, improve powder utilization rate and disposable yield rate.
In prior art, the patent " Nd-Fe-B fillet mould " that is 200720074280.6 as application number discloses a kind of mould that reduces square arrisdefect, but does not solve the arrisdefect problem of neodymium iron boron cylinder; Application number is that 201220492201.4 patent " a kind of neodymium-iron-boron mould " discloses a kind of mould that improves product different parts dimensional homogeneity after sintering, only has patrix chamfering, and emphasis does not solve product arrisdefect problem.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of Sintered NdFeB magnet compacting tool set.Can improve product concentric reducer phenomenon, reduce muscle to size, improve powder utilization rate, reduce abrasion, reduce pressed compact and blank arrisdefect, reduce the rear difficulty of processing such as centreless grinding, improve disposable yield rate.
A kind of Sintered NdFeB magnet compacting tool set of the present utility model, comprises upper trimming die and lower punch die, it is characterized in that described upper trimming die and lower punch die are provided with chamfering structure.
Described a kind of Sintered NdFeB magnet compacting tool set, is characterized in that the inside of described upper trimming die and lower punch die is respectively arranged with two adjacent semicolumn grooves.
Described a kind of Sintered NdFeB magnet compacting tool set, the corner structure radius that it is characterized in that described chamfering structure is 0.01-0.5mm.
Described a kind of Sintered NdFeB magnet compacting tool set, the radial spacing that it is characterized in that described two adjacent semicolumn grooves is 0.5-2mm.
A kind of Sintered NdFeB magnet compacting tool set of the present utility model, adopts this mould molding, can effectively prevent concentric reducer phenomenon, reduces muscle size, improves powder utilization rate, reduces abrasion; Reduce the arrisdefect of pressed compact and blank, also reduced the arrisdefect rate of the rear process such as centreless grinding, improve the disposable yield rate of magnet; In addition, utilize this formed in mould magnet to be convenient to transportation.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the sintered products sketch of the utility model compacting;
Fig. 3 is lower punch die front view of the present utility model;
Fig. 4 is the enlarged drawing of A in Fig. 3;
Fig. 5 is lower punch die left view of the present utility model;
In figure, 1-upper trimming die; 2-lower punch die; 3-magnetic conduction side plate; 4-neodymium-iron-boron powder; 5-chamfering structure.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.
As Fig. 3 ~ Figure 5 shows that a kind of sintered NdFeB compacting tool set that the utility model provides, comprise upper trimming die, lower punch die and magnetic conduction side plate.Upper and lower stamping die adopts nonmagnetic steel.Be characterized in: upper and lower punch die carries out respectively chamfering, the structure radius of described chamfering is 0.3mm, and its surface smoothness is 1.6.The radial spacing of the adjacent two semicircular intercolumniation of upper and lower punch die is at 0.5-2mm.
Adopt this mould, produce neodymium iron boron φ 24 × 36 cylinders, arrisdefect rate is reduced to 1.3% from original 8.5%, centreless grinding arrisdefect rate is reduced to 0.5% from 3%, abrasion are reduced to 7.5% disposable yield rate from 9.8% and rise to 90% left and right from 76%, obviously reduce arrisdefect rate and abrasion, improve disposable yield rate.Utilize even size distribution after the product sintering of this mould compacting, muscle differs little to size and compacting size, and product appearance is good, is also difficult for occurring arrisdefect in transportation.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within being all included in protection domain of the present utility model.
Claims (1)
1. a Sintered NdFeB magnet compacting tool set, comprise upper trimming die and lower punch die, it is characterized in that edge is provided with chamfering structure, the inside of described upper trimming die and lower punch die is respectively arranged with two adjacent semicolumn grooves, the corner structure radius of described chamfering structure is 0.01-0.5mm, and the radial spacing of described two adjacent semicolumn grooves is 0.5-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320455043.XU CN203635910U (en) | 2013-07-29 | 2013-07-29 | Sintered NdFeB magnet compacting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320455043.XU CN203635910U (en) | 2013-07-29 | 2013-07-29 | Sintered NdFeB magnet compacting die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203635910U true CN203635910U (en) | 2014-06-11 |
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ID=50867190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320455043.XU Expired - Lifetime CN203635910U (en) | 2013-07-29 | 2013-07-29 | Sintered NdFeB magnet compacting die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203635910U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007859A (en) * | 2022-06-23 | 2022-09-06 | 宁波京甬磁业有限公司 | Forming orientation process of neodymium iron boron magnet |
-
2013
- 2013-07-29 CN CN201320455043.XU patent/CN203635910U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007859A (en) * | 2022-06-23 | 2022-09-06 | 宁波京甬磁业有限公司 | Forming orientation process of neodymium iron boron magnet |
| CN115007859B (en) * | 2022-06-23 | 2024-05-03 | 宁波京甬磁业有限公司 | Molding orientation process of neodymium-iron-boron magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A pressing die for sintered NdFeB magnets Effective date of registration: 20221127 Granted publication date: 20140611 Pledgee: ZHEJIANG DONGYANG RURAL COMMERCIAL BANK Co.,Ltd. Pledgor: ZHEJIANG ZHONGYUAN MAGNETIC MATERIAL CO.,LTD. Registration number: Y2022330003218 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |