CN201760594U - NdFeB molding die with uniform orientation magnetic field - Google Patents
NdFeB molding die with uniform orientation magnetic field Download PDFInfo
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- CN201760594U CN201760594U CN2010205173396U CN201020517339U CN201760594U CN 201760594 U CN201760594 U CN 201760594U CN 2010205173396 U CN2010205173396 U CN 2010205173396U CN 201020517339 U CN201020517339 U CN 201020517339U CN 201760594 U CN201760594 U CN 201760594U
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Abstract
A NdFeB molding die with uniform orientation magnetic field relates to a molding die of NdFeB production process. The structure of the NdFeB molding die is composed of a box-shaped lower die frame with an opening upward which consists of a pair of end formworks and a pair of side formworks at the circumstance, and a liftable bracket at the bottom, lining boards at the inner walls of the side formworks, a lower die and a bracket in the lining boards, and an upper die fixed on an upper die connecting rod; an upper end of the lower die is provided with a plurality of semicircular column cavity slots with openings upward, a lower end of the upper die is provided with a plurality of semicircular column cavity slots corresponding downwardly, one magnetic conduction strip is embedded at the inner side of the middle part of the lining board with a die folding line as a central line, the cross section of the magnetic conduction strip is of a double-trapezoid conjoined shape. The utility model has advantages that die not only can enable the homogeneity partial difference of the magnetic field to be improved from 12% to 3%, and the hardness and the abrasion resistance of the die in the work region all can be improved.
Description
Technical field:
The utility model relates to neodymium iron boron production technology mould.
Background technology:
At present, known Nd-Fe-Bo permanent magnet material production is made up of operations such as melting, powder process, batch mixing, moulding, sintering, machined, surface treatments.Molding procedure is with mould powdered granule to be pressed into many cylinder bar or squares arranged side by side on two pressing under magnetic field forcing presses, mould therefor by around pair of end template, a pair of side template, the liftable carriage in bottom forms the box-like body low mold frame that opening makes progress, and a pair of side template inwall fit fixing a pair of liner plate, a pair of liner plate inboard movingly fit counterdie and carriage, be fixed on the patrix composition of patrix extension bar; Cylinder product counterdie upper end is several semicolumn cavity groove that the opening of axis parallel makes progress, and the patrix bottom is corresponding axis parallel several semicolumn cavity groove that Open Side Down.Pair of end template outer surface is fitted on a pair of electromagnetic induction coil cartridge that is fixed on the press machine lower die frame, the electromagnetic induction coil effect is to produce 1.5T～2.2T magnetic field in framed, during compacting magnetic generation magnetic field force guiding magnetic crystal being pressed magnetic field orientating arrangement paramagnetic is orientated, side template, liner plate, base plate, upper die and lower die then adopt non-magnet_conductible material, lose in order to avoid magnetic current is directly guided in the heavy in section.
The small column product is because diameter is little but the transversely arranged processing quantity of product is many, lateral dimension is big, thereby makes the product of different lateral attitudes be in the center or the edge in magnetic field, the alignment magnetic field difference that causes product to be subjected to.During central magnetic field intensity 1.7T, the magnetic field intensity at edge is 1.5T when moulding compacting powder.Known moulding alignment magnetic field plays main effect for remanent magnetism Br, the coercivity H j index of product, causes the consistency of product deviation easily.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned defective, and the mould of the even alignment magnetic field of a kind of molding neodymium iron boron is provided.
Scheme of the present utility model is: inboard at the liner plate middle part is that center line embeds a magnetic conduction bar with the spue line, magnetic conduction bar cross sectional shape is vertical trapezoidal and long base toward the outer side the vertical trapezoidal special-shaped disjunctor shape of long base in framed, liner plate middle part is inboard to offer and the corresponding cavity groove of described magnetic conduction bar abnormity disjunctor shape, and the length on the two vertical trapezoidal long bases of magnetic conduction bar towards framed in meets the following conditions: the magnetic field that two magnetic conduction bars produce during with matched moulds whole transversely arranged cylindrical rod material packages wrap up in wherein.
Advantage of the present utility model is: solved the formed product orientation uniformity offset issue that magnetizes, the uniformity deviation that this mould can not only make magnetic field brings up to 3% from original 12%, and in the hardness and the wear resistence of the working region of mould raising is arranged all.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment:
Structure of the present utility model by around pair of end template 8, a pair of side template 4, the liftable carriage 7 in bottom forms the box-like body low mold frame that opening makes progress, and a pair of side template 4 inwalls fit fixing a pair of liner plate 3, a pair of liner plate 3 inboards movingly fit counterdie 5 and carriage 7, be fixed on patrix 2 compositions of patrix extension bar 1 lower surface; Counterdie 5 upper ends are several semicolumn cavity groove that the opening of axis parallel makes progress, patrix 2 bottoms are corresponding axis parallel several semicolumn cavity groove that Open Side Down, it is characterized in that: be that center line embeds a magnetic conduction bar 6 in inboard, liner plate 3 middle part with the spue line, magnetic conduction bar 6 cross sectional shapes are vertical trapezoidal and long base toward the outer side the vertical trapezoidal special-shaped disjunctor shape of long base in framed, inboard, liner plate 3 middle part offers and the corresponding cavity groove of described magnetic conduction bar 6 special-shaped disjunctor shapes, and the length on the two vertical trapezoidal long bases of magnetic conduction bar 6 in framed meets the following conditions: the magnetic field that two magnetic conduction bars 6 produce during with matched moulds all transversely arranged cylindrical rod material packages wrap up in wherein.
Magnetic conduction bar 6 special-shaped disjunctor shape structures are for after making long base vertical trapezoidal embedding side template 4 toward the outer side, and magnetic conduction bar 6 positioning and fixing are linked in the cavity groove of liner plate 3.Magnetic conduction bar 6 two ends head on the Side Template 8 of magnetic conduction, and the magnetic of Side Template 8 Conducted Electromagnetic induction coils makes magnetic conduction bar 6 produce peripheral magnetic field, and the magnetic field in the space, cylindrical rod place that is arranged in both ends of contiguous magnetic conduction bar 6 has been strengthened in this peripheral magnetic field, make both ends space magnetic field and central part space magnetic field dwindle the magnetic field intensity difference, just strengthened the even orientation of edge part and central part magnetic.Use bolting between each template.The magnetic line of force guide magnetic stripe at the orientation edge that magnetizes is compiled, and it is close with central magnetic field intensity to allow fringe magnetic field intensity increase, and reaches the purpose of even alignment magnetic field.The sectional area of magnetic conduction bar be a mold forming product cross section long-pending 1/20, so both solved problem because of the whole magnetic conduction magnetic loops shieldings of liner plate, can allow the magnetic conduction bar of the part magnetic line of force compile again to the powder edge.
Magnetic conduction bar 6 manufacture material after heat treatment, hardness HRC55 is higher than the hardness HRC46 of former non-magnet material, the hardness of die-face improves, and after scuff resistance increased, also be improved the service life of mould, reduced the frequency that mould is revised and changed like this, production efficiency will get a promotion.
Claims (1)
1. the mould of the even alignment magnetic field of molding neodymium iron boron, by around pair of end template (8), a pair of side template (4), the liftable carriage in bottom (7) forms the box-like body low mold frame that opening makes progress, and a pair of side template (4) inwall fit fixing a pair of liner plate (3), a pair of liner plate (3) inboard counterdie of fit (5) and carriage (7) movingly, be fixed on patrix (2) composition of patrix extension bar (1) lower surface; Counterdie (5) upper end is several semicolumn cavity groove that the opening of axis parallel makes progress, patrix (2) bottom is corresponding axis parallel several semicolumn cavity groove that Open Side Down, it is characterized in that: inboard at liner plate (3) middle part is that center line embeds a magnetic conduction bar (6) with the spue line, magnetic conduction bar (6) cross sectional shape is vertical trapezoidal and long base toward the outer side the vertical trapezoidal special-shaped disjunctor shape of long base in framed, inboard, liner plate (3) middle part offers and the corresponding cavity groove of the special-shaped disjunctor shape of described magnetic conduction bar (6), and the length on the vertical trapezoidal long base of two magnetic conduction bars (6) towards framed in meets the following conditions: the magnetic field that two magnetic conduction bars (6) produce during with matched moulds whole transversely arranged cylindrical rod material packages wrap up in wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205173396U CN201760594U (en) | 2010-09-06 | 2010-09-06 | NdFeB molding die with uniform orientation magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205173396U CN201760594U (en) | 2010-09-06 | 2010-09-06 | NdFeB molding die with uniform orientation magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201760594U true CN201760594U (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205173396U Expired - Fee Related CN201760594U (en) | 2010-09-06 | 2010-09-06 | NdFeB molding die with uniform orientation magnetic field |
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| CN (1) | CN201760594U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961787A (en) * | 2010-09-06 | 2011-02-02 | 宁德市星宇科技有限公司 | Neodymium iron boron (NdFeB) die for forming uniform oriented magnetic field |
| CN104190925A (en) * | 2014-09-16 | 2014-12-10 | 北京京磁强磁材料有限公司 | Compression molding die |
| CN106180704A (en) * | 2016-10-10 | 2016-12-07 | 崔晓 | A kind of neodymium iron boron strip-shaped product mould and using method |
| CN106409456A (en) * | 2016-08-26 | 2017-02-15 | 宁波同创强磁材料有限公司 | Rare earth permanent magnet preparation process for improving magnetic property |
| CN106670456A (en) * | 2016-10-27 | 2017-05-17 | 宁波鑫丰磁业有限公司 | Magnet vertical press forming method and forming equipment thereof |
-
2010
- 2010-09-06 CN CN2010205173396U patent/CN201760594U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961787A (en) * | 2010-09-06 | 2011-02-02 | 宁德市星宇科技有限公司 | Neodymium iron boron (NdFeB) die for forming uniform oriented magnetic field |
| CN101961787B (en) * | 2010-09-06 | 2012-04-25 | 宁德市星宇科技有限公司 | Neodymium iron boron (NdFeB) die for forming uniform oriented magnetic field |
| CN104190925A (en) * | 2014-09-16 | 2014-12-10 | 北京京磁强磁材料有限公司 | Compression molding die |
| CN106409456A (en) * | 2016-08-26 | 2017-02-15 | 宁波同创强磁材料有限公司 | Rare earth permanent magnet preparation process for improving magnetic property |
| CN106409456B (en) * | 2016-08-26 | 2018-09-07 | 宁波同创强磁材料有限公司 | A kind of rare earth permanent magnet preparation process improving magnetic property |
| CN106180704A (en) * | 2016-10-10 | 2016-12-07 | 崔晓 | A kind of neodymium iron boron strip-shaped product mould and using method |
| CN106180704B (en) * | 2016-10-10 | 2018-05-08 | 荣成宏秀山磁业有限公司 | A kind of neodymium iron boron strip-shaped product mould and application method |
| CN106670456A (en) * | 2016-10-27 | 2017-05-17 | 宁波鑫丰磁业有限公司 | Magnet vertical press forming method and forming equipment thereof |
| CN106670456B (en) * | 2016-10-27 | 2019-05-03 | 宁波鑫丰磁业有限公司 | A kind of vertical briquetting process of magnet and its molding equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20190906 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |