CN102847938B - Magnetic material powder forming mold - Google Patents
Magnetic material powder forming mold Download PDFInfo
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- CN102847938B CN102847938B CN201210374171.1A CN201210374171A CN102847938B CN 102847938 B CN102847938 B CN 102847938B CN 201210374171 A CN201210374171 A CN 201210374171A CN 102847938 B CN102847938 B CN 102847938B
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Abstract
The invention discloses a magnetic material powder forming mold, which comprises a female die, wherein a female die cavity is arranged in the female die; and the saturation polarization strength of at least one side face of the female die cavity is consistent with the saturation polarization strength of magnetic material powder to be pressed. According to the magnetic material powder forming mold, the saturation polarization strength of the at least one side face of the female die cavity is consistent with the saturation polarization strength of the magnetic material powder, so that an edge distortion phenomenon of a magnetic field is transferred from the magnetic material powder to a side face of the female die cavity made of the material, the magnetic field of the magnetic material powder is guaranteed to be a uniform magnetic field, and the performance of a blank made through the mold is guaranteed. Because of an arrangement mode of an isolating plate, the material with the saturation polarization strength consistent with that of the magnetic material powder is arranged on different side faces according to different requirements, so that the application range is wide and the pressing of the magnetic powder is not affected.
Description
Technical field
The present invention relates to mould manufacturing field, refer in particular to a kind of mold for molding magnetic material powder.
Background technology
As shown in Figure 1, the mould using is at present made up of former and seaming chuck 5, push-down head 6, and former is made up of four blocks of side plates all around, and wherein left plate 3, right plate 4 have used permeability magnetic material, are generally Gr12 steel or GGr15 steel; Front side board 1, back side panel 2 are non-magnet_conductible material, are generally 304 stainless steels, without magnetic mould steel, non-magnesium hard alloy etc., and seaming chuck 5, push-down head 6 are also non-magnet_conductible material.
Magnaglo needs to have magnetic field orientating in pressing process, makes the direction of magnetization of powder identical with the direction of externally-applied magnetic field.The coil of orientation use is arranged on press, in the time of coil electricity, and press frame, cartridge, left and right side plate, die cavity form magnetic circuit.
The benefit of existing such mould is: overall magnetic resistance is less, only needs less electric current just can make the magnetic induction intensity in die cavity reach technical requirement.
But above-mentioned mould has only been considered the intensity in magnetic field, do not consider the movement of magnetic in die cavity.In fact, if magnetic in a uniform magnetic field, magnetic is in static or only can rotate so, turn to the direction of magnetization of magnetic consistent with magnetic direction till; And in the time of Magnetic field inhomogeneity, magnetic can move towards the high place of magnetic induction intensity.
Clearly, the mould using at present, because its left and right side plate has used permeability magnetic material, the distribution situation of its die cavity internal magnetic field is: higher the closer to left side plate place magnetic induction intensity, in middle, magnetic induction intensity is minimum.See intuitively, be exactly, after left and right side plate magnetizes in magnetic field, to have produced the attraction to magnetic, when this has just caused orientation, magnetic moves at two ends to the left and right, thereby make blank material out of compacting inhomogeneous, finally show that blank after sintering becomes the waist contracting shape of big at both ends and small in middle.
In addition, inhomogeneous due to Distribution of Magnetic Field, has also caused compacting blank out inconsistent in the differently-oriented directivity at each position, also can affect its performance.
Summary of the invention
The object of this invention is to provide a kind of mold for molding magnetic material powder, it can overcome the deficiencies in the prior art, makes the blank material that produces by this mould even, functional.
The object of the present invention is achieved like this:
Mold for molding magnetic material powder, it includes former, is provided with former inner chamber in described former, and the saturated polarization of at least one side of described former inner chamber is consistent with the saturated polarization of the magnetic material powder that need to suppress.
From the angle in magnetic field, the magnetic line of force, by two parallel magnetic conductive boards, can form uniform magnetic field in the central area of two magnetic conductive boards, can be because the existence of edge effect causes magnetic line of force distortion at the fringe region of two magnetic conductive boards.So, for mold for molding magnetic material powder, in the time not considering the magnetic property of magnetic, only the plane of left plate and right plate need to be strengthened, the magnetic field of center just can be thought uniformly.But add after magnetic, because magnetic itself has certain magnetic conductivity, so also can distortion at the magnetic line of force at magnetic edge.The present invention is consistent with the saturated polarization of the magnetic material powder that need to suppress by the saturated polarization of the material of former inner chamber, under the effect of alignment magnetic field, the magnetic conductivity of division board is consistent with the magnetic conductivity of magnetic material powder, the edge twisted phenomena in magnetic field is transferred to the side of the former inner chamber of being made up of this material from magnetic material powder, the magnetic field of having guaranteed magnetic material powder is uniform magnetic field, guarantees the performance of the blank of the magnetic material powder of suppressing out.
Former of the present invention includes multiple side plates, and the saturated polarization of multiple described side plates is consistent with the saturated polarization of the magnetic material powder that need to suppress.
The material of at least one side of former inner chamber of the present invention can be for being used the carbide alloy of cobalt as Binder Phase.
The material of at least one side plate of former inner chamber of the present invention can be carbide alloy or the carbide alloy that is 16%-20% containing cobalt amount or the carbide alloy that is 22%-25% containing cobalt amount that is 15% containing cobalt amount.
The material of at least one side of former inner chamber of the present invention can be the ferroalloy containing half martensite, semiaustenitic, or at least one side of described former inner chamber material be the ferroalloy containing half ferrite, semiaustenitic.
At least one side of former inner chamber of the present invention is provided with division board, and the saturated polarization of described division board is consistent with the saturated polarization of the magnetic material powder that need to suppress.
Former of the present invention includes left plate, right plate, front side board and back side panel, at least be respectively equipped with division board on left side and the right side of described former inner chamber, the saturated polarization of described division board is consistent with the saturated polarization of the magnetic material powder that need to suppress.
Left plate of the present invention and described right plate are provided with the recessed structure coordinating with described division board in a side of described former inner chamber, the width of described recessed structure is greater than the width of described former inner chamber.
The front side board of former inner chamber of the present invention and back side panel also can be provided with described division board, four described division boards are connected to form hollow cylindrical body in turn, the outer wall of described cylindrical body matches with the inwall of described former inner chamber, and the shape of the inner chamber of described cylindrical body matches with the shape of the blank that needs compacting.
Mold for molding magnetic material powder of the present invention also includes seaming chuck and push-down head, the saturated polarization of described seaming chuck is consistent with the saturated polarization of the Magnaglo that need to suppress, and the saturated polarization of described push-down head is consistent with the saturated polarization of the Magnaglo that need to suppress.
The present invention compared with prior art, has following beneficial effect:
The present invention passes through consistent to the saturated polarization of at least one side material of former inner chamber and the saturated polarization of magnetic material powder, the edge twisted phenomena in magnetic field is transferred on the side of the former inner chamber of being made up of this material from magnetic material powder, the magnetic field that guarantees magnetic material powder is uniform magnetic field, guarantees the performance of the blank of making by this mould.
The set-up mode of division board of the present invention can be arranged at according to different demands the consistent material of saturated polarization of magnetic material powder on different sides, applied widely, can not affect the compacting of Magnaglo.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art mold for molding magnetic material powder;
Fig. 2 is the structural representation of mold for molding magnetic material powder embodiment 1 of the present invention;
Fig. 3 is the structural representation of mold for molding magnetic material powder embodiment 2 of the present invention;
Fig. 4 is the structural representation of mold for molding magnetic material powder embodiment 3 of the present invention;
Fig. 5 is the structural representation of mold for molding magnetic material powder embodiment 4 of the present invention.
In figure: 1-left plate, 2-right plate, 3-front side board, 4-back side panel, 5-seaming chuck, 6-push-down head, 11-seaming chuck, 12-push-down head, 13-front side board, 14-back side panel, 15-left plate, 16-right plate, 17-former inner chamber, 18-division board, 19-division board, the hollow cylindrical body of 21-.
The specific embodiment
Mold for molding magnetic material powder of the present invention, it includes former, seaming chuck and push-down head, in described former, be provided with former inner chamber, the saturated polarization of at least one side of described former inner chamber is consistent with the saturated polarization of the magnetic material powder that need to suppress.Wherein, can be according to the distortion situation of the blank suppressing, adjust the saturated polarization of the material of corresponding former inner chamber employing, make it and need the saturated polarization of the magnetic material powder of suppressing consistent.
Described former includes multiple side plates, also can adopt the saturated polarization of adjusting multiple described side plates, makes it and needs the saturated polarization of the magnetic material powder of suppressing consistent; The material of at least one side of described former inner chamber is to use the carbide alloy of cobalt as Binder Phase.
The carbide alloy that the material of at least one side plate of described former inner chamber is is 15% containing cobalt amount or the carbide alloy that is 16%-20% containing cobalt amount or the carbide alloy that is 22%-25% containing cobalt amount; Or the material of at least one side of described former inner chamber is the ferroalloy containing half martensite, semiaustenitic, or at least one side of described former inner chamber material be the ferroalloy containing half ferrite, semiaustenitic.
Embodiment 1:
As shown in Figure 2, this preferred embodiment includes four blocks of side plates as example take former.Described mould includes seaming chuck 11, push-down head 12 and former, described former includes front side board 13, back side panel 14, left plate 15 and right plate 16, and described front side board 13, described back side panel 14, described left plate 15 and described right plate 16 are around forming former inner chamber 17.Preferred described former inner chamber 17 inner sides are whole for adopting the saturated polarization material consistent with the saturated polarization that needs the magnetic material powder of suppressing to make; Or the saturated polarization of the material of left plate 15 and right plate 16 with need the saturated polarization of magnetic material powder of compacting consistent; Or the saturated polarization of the material of described front side board 13, described back side panel 14, described left plate 15 and described right plate 16 is consistent with the saturated polarization of the magnetic material powder that need to suppress.
In this preferred embodiment, preferably be respectively equipped with division board 18,19 on left side and the right side of described former inner chamber 17, the saturated polarization of described division board 18,19 is consistent with the saturated polarization of the magnetic material powder that need to suppress, described division board 18,19 covers the left side of described former inner chamber and right side respectively completely, by described division board 18,19, magnetic material powder is isolated with left plate 15 and right plate 16 completely.
From the angle in magnetic field, the magnetic line of force, by two parallel magnetic conductive boards, can form uniform magnetic field in the central area of two magnetic conductive boards, can be due to the magnetic line of force distortion of edge effect existence at the fringe region of two magnetic conductive boards.So, for mold for molding magnetic material powder, in the time not considering the magnetic property of magnetic, only the area of plane of left plate 15 and right plate 16 need to be strengthened, the magnetic field of center can be thought uniformly, but add after magnetic material powder, because magnetic material powder itself has certain magnetic conductivity, so also can distortion at the magnetic line of force at magnetic material powder edge.The present invention arranges division board in the inner side of left plate and right plate, and the saturated polarization that is division board is consistent with the saturated polarization of the magnetic material powder that need to suppress, under the effect of alignment magnetic field, the magnetic conductivity of division board is consistent with the magnetic conductivity of magnetic material powder, the edge twisted phenomena in magnetic field is transferred to division board from magnetic material powder, the magnetic field of having guaranteed magnetic material powder is uniform field, guarantees the performance of the blank of the magnetic material powder of suppressing out.
The material of described division board 18,19 is to use the carbide alloy of cobalt as Binder Phase.The content of cobalt is higher, and the saturated polarization of carbide alloy is higher, by controlling the saturated polarization of content control division board of cobalt, makes its saturated polarization consistent with the saturated polarization of magnetic material powder.The material of described division board 18,19 is YG15 carbide alloy, YG16 carbide alloy, YG17 carbide alloy, YG18 carbide alloy, YG19 carbide alloy or YG20 carbide alloy.
The material of described division board 18,19 can be also the ferroalloy containing half martensite, semiaustenitic, or the material of described division board is the ferroalloy containing half ferrite, semiaustenitic, control the saturated polarization of division board by adjusting austenitic content, make its saturated polarization consistent with the saturated polarization of magnetic material powder, austenite content is higher, and saturated polarization is lower.
For the ease of described division board 18 and described division board 19 being individually fixed in to the inner side of described left plate 15 and described right plate 16, described left plate 15 is provided with the recessed structure coordinating with described division board 18 in a side of described former inner chamber 17, described right plate 16 is provided with the recessed structure coordinating with described division board 19 in a side of described former inner chamber 17, and the width of described recessed structure is greater than the width of described former inner chamber 17.When described division board 18,19 is embedded into described left plate 15, described right plate 16 when interior, can avoid magnetic material powder to contact with left plate 15, the right plate 16 of magnetic conduction completely.
In the present embodiment, described magnetic material powder is neodymium iron boron powder, and the material of described division board 18,19 is preferably YG18 carbide alloy.Described seaming chuck 11 and described push-down head 12 also adopt YG18 carbide alloy to make.
Embodiment 2:
As shown in Figure 3, front side board 13 and the back side panel 14 of described former inner chamber 17 are equipped with described division board, four described division boards are connected to form hollow cylindrical body 21 in turn, the outer wall of described cylindrical body 21 matches with the inwall of described former inner chamber 17, and the shape of the inner chamber of described cylindrical body 21 matches with the shape of the blank that needs compacting.Four division boards form cylindrical body 21 as an overall structure, easy for installation.Accordingly, in order to match with described cylindrical body 21, the length of described front side board 13 and described back side panel 14 needs to shorten accordingly.
Embodiment 3:
As shown in Figure 4, in the time that needs are suppressed special-shaped magnetic material powder, the shape of alteration of form cylindrical body 21 inner chambers that also can be as required, the blank of the 45° angle of tilted direction shown in Fig. 4 orientation, leaves the inner chamber similar to blank shape at the middle part of described cylindrical body 21.
Embodiment 4:
As shown in Figure 5, the cavity shape of described cylindrical body 21 is the combination of cuboid and semicolumn, to fit special-shaped blank corresponding to compacting.。
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. mold for molding magnetic material powder, it includes former, in described former, be provided with former inner chamber (17), it is characterized in that, the saturated polarization of at least one side of described former inner chamber (17) is consistent with the saturated polarization of the magnetic material powder that need to suppress.
2. mold for molding magnetic material powder according to claim 1, is characterized in that, described former includes multiple side plates, and the saturated polarization of multiple described side plates is consistent with the saturated polarization of the magnetic material powder that need to suppress.
3. mold for molding magnetic material powder according to claim 1 and 2, is characterized in that, the material of at least one side of described former inner chamber (17) is to use the carbide alloy of cobalt as Binder Phase.
4. mold for molding magnetic material powder according to claim 3, it is characterized in that the carbide alloy that the material of at least one side plate of described former inner chamber (17) is is 15% containing cobalt amount or the carbide alloy that is 16%-20% containing cobalt amount or the carbide alloy that is 22%-25% containing cobalt amount.
5. mold for molding magnetic material powder according to claim 1 and 2, it is characterized in that, the material of at least one side of described former inner chamber (17) is the ferroalloy containing half martensite, semiaustenitic, or the material of at least one side of described former inner chamber is the ferroalloy containing half ferrite, semiaustenitic.
6. mold for molding magnetic material powder according to claim 1 and 2, it is characterized in that, at least one side of described former inner chamber (17) is provided with division board, and the saturated polarization of described division board is consistent with the saturated polarization of the magnetic material powder that need to suppress.
7. mold for molding magnetic material powder according to claim 6, it is characterized in that, described former includes left plate (15), right plate (16), front side board (13) and back side panel (14), at least be respectively equipped with division board (18), (19) on left side and the right side of described former inner chamber (17), the saturated polarization of described division board (18), (19) is consistent with the saturated polarization of the magnetic material powder that need to suppress.
8. mold for molding magnetic material powder according to claim 7, it is characterized in that, described left plate (15) and described right plate (16) are provided with the recessed structure coordinating with described division board in a side of described former inner chamber (17), the width of described recessed structure is greater than the width of described former inner chamber.
9. mold for molding magnetic material powder according to claim 6, it is characterized in that, front side board (13) and the back side panel (14) of described former inner chamber (17) also can be provided with described division board (18), (19), four described division boards are connected to form hollow cylindrical body (21) in turn, the outer wall of described hollow cylindrical body (21) matches with the inwall of described former inner chamber (17), and the shape of the inner chamber of described hollow cylindrical body (21) matches with the shape of the blank that needs compacting.
10. mold for molding magnetic material powder according to claim 1, it is characterized in that, described mold for molding magnetic material powder also includes seaming chuck (11) and push-down head (12), the saturated polarization of described seaming chuck (11) is consistent with the saturated polarization of the Magnaglo that need to suppress, and the saturated polarization of described push-down head (12) is consistent with the saturated polarization of the Magnaglo that need to suppress.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210374171.1A CN102847938B (en) | 2012-10-07 | 2012-10-07 | Magnetic material powder forming mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210374171.1A CN102847938B (en) | 2012-10-07 | 2012-10-07 | Magnetic material powder forming mold |
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| CN102847938A CN102847938A (en) | 2013-01-02 |
| CN102847938B true CN102847938B (en) | 2014-07-02 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317130B (en) * | 2013-06-08 | 2016-01-20 | 江苏金石稀土有限公司 | A kind of mould and using method thereof preparing permanent-magnet material radial column |
| CN103447527A (en) * | 2013-08-07 | 2013-12-18 | 宁波韵升股份有限公司 | Magnet forming die |
| CN104139183B (en) * | 2014-06-30 | 2016-03-30 | 中磁科技股份有限公司 | The shaped device of rare earth permanent-magnetic material and forming method |
| CN107206492A (en) * | 2015-03-19 | 2017-09-26 | 哈里伯顿能源服务公司 | Many material metal matrix composite tools of isolation |
| CN106493360B (en) * | 2016-12-14 | 2018-12-07 | 京磁材料科技股份有限公司 | The compacting tool set of neodymium iron boron magnetic body |
| CN108973205A (en) * | 2017-06-02 | 2018-12-11 | 自贡硬质合金有限责任公司 | A kind of special-shaped product molding die and its assembly method |
| CN107718672A (en) * | 2017-10-26 | 2018-02-23 | 河北工业职业技术学院 | Powder presses sample making apparatus |
| CN115945687A (en) * | 2022-12-28 | 2023-04-11 | 北京浦然轨道交通科技股份有限公司 | Cavity mold, friction body and brake shoe preparation method |
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| CN201799607U (en) * | 2010-09-08 | 2011-04-20 | 横店集团东磁股份有限公司 | Molding die for pressing magnetic powder into multi-pole radial product |
| CN202411413U (en) * | 2011-12-20 | 2012-09-05 | 上海爱普生磁性器件有限公司 | Rare earth permanent magnet compression forming die |
| CN202779793U (en) * | 2012-10-07 | 2013-03-13 | 江西金力永磁科技有限公司 | Magnetic material powder forming mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3851281B2 (en) * | 2003-02-17 | 2006-11-29 | 三菱電機株式会社 | Magnetic powder filling apparatus, magnetic powder filling method, and neodymium sintered magnet manufacturing method |
| JP4484063B2 (en) * | 2005-02-28 | 2010-06-16 | Ｔｄｋ株式会社 | Magnetic field forming method, rare earth sintered magnet manufacturing method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201799607U (en) * | 2010-09-08 | 2011-04-20 | 横店集团东磁股份有限公司 | Molding die for pressing magnetic powder into multi-pole radial product |
| CN202411413U (en) * | 2011-12-20 | 2012-09-05 | 上海爱普生磁性器件有限公司 | Rare earth permanent magnet compression forming die |
| CN202779793U (en) * | 2012-10-07 | 2013-03-13 | 江西金力永磁科技有限公司 | Magnetic material powder forming mold |
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Owner name: JIANGXI JL PERMANENT MAGNET TECHNOLOGY CO., LTD. Free format text: FORMER NAME: JLMAG RARE-EARTH CO., LTD. |
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Address after: 341000 Jinling West Road, Ganzhou Development Zone, Ganzhou, Jiangxi Patentee after: JLMAG RARE-EARTH CO., LTD. Address before: Jinling West Road, Ganzhou Development Zone, Jiangxi Patentee before: Jiangxi Jinli Permanent Magnetic Technology Co.,Ltd. |