CN102847938A - Magnetic material powder forming mold - Google Patents
Magnetic material powder forming mold Download PDFInfo
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- CN102847938A CN102847938A CN2012103741711A CN201210374171A CN102847938A CN 102847938 A CN102847938 A CN 102847938A CN 2012103741711 A CN2012103741711 A CN 2012103741711A CN 201210374171 A CN201210374171 A CN 201210374171A CN 102847938 A CN102847938 A CN 102847938A
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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 that uses at present is comprised of former and seaming chuck 5, push-down head 6, and former is comprised 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, and non-magnesium hard alloy etc., seaming chuck 5, push-down head 6 also are non-magnet_conductible material.
Magnaglo needs to have magnetic field orientating in pressing process, make the direction of magnetization of powder identical with the direction of externally-applied magnetic field.The coil of orientation usefulness is installed on the press, when coil electricity, and press frame, cartridge, left and right side plate, die cavity consist of magnetic circuit.
The benefit of existing such mould is: whole magnetic resistance is less, only needs less electric current just can make the magnetic induction intensity in the die cavity reach specification requirement.
But above-mentioned mould has only been considered the intensity in magnetic field, does not consider the movement of magnetic in the die cavity.In fact, if magnetic in a uniform magnetic field, magnetic is in static or only can rotates so, the direction of magnetization that turns to magnetic is with till magnetic direction is consistent; And when Magnetic field inhomogeneity, magnetic then can move towards the high place of magnetic induction intensity.
Clearly, the mould that uses 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, magnetic induction intensity is minimum in the centre.See intuitively, be exactly after left and right side plate magnetizes in magnetic field, to have produced the attraction to magnetic, magnetic moved at two ends to the left and right when this had just caused orientation, thereby so that compacting blank material out is inhomogeneous, show that finally the blank behind the sintering becomes the little waist contracting shape in large centre, two ends.
In addition, because Distribution of Magnetic Field is inhomogeneous, also cause compacting blank out inconsistent in the differently-oriented directivity at each position, also can affect its performance.
Summary of the invention
The purpose 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 the former inner chamber in the 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 needs compacting.
From the angle in magnetic field, the magnetic line of force can form uniform magnetic field in the central area of two magnetic conductive boards by two parallel magnetic conductive boards, then can cause owing to the existence of edge effect magnetic line of force distortion at the fringe region of two magnetic conductive boards.So, for mold for molding magnetic material powder, when not considering the magnetic property of magnetic, only the plane of left plate and right plate need to be strengthened, then the magnetic field of center just can be thought uniformly.But behind the adding magnetic, because magnetic itself has certain magnetic conductivity, so also can twist at the magnetic line of force at magnetic edge.The present invention is consistent with the saturated polarization of the magnetic material powder that needs compacting with 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, make the edge twisted phenomena in magnetic field transfer on the side of the former inner chamber of being made by this material from magnetic material powder, the magnetic field of having guaranteed magnetic material powder is uniform magnetic field, the performance of the blank of the magnetic material powder that assurance is suppressed out.
Former of the present invention includes a plurality of side plates, and the saturated polarization of a plurality of described side plates is consistent with the saturated polarization of the magnetic material powder that needs compacting.
The material of at least one side of former inner chamber of the present invention can be for using cobalt as the carbide alloy of Binder Phase.
The material of at least one side plate of former inner chamber of the present invention can be 15% carbide alloy or to contain the cobalt amount be the carbide alloy of 16%-20% or contain the carbide alloy that the cobalt amount is 22%-25% for containing the cobalt amount.
The material of at least one side of former inner chamber of the present invention can be for containing the ferroalloy of half martensite, semiaustenitic, or at least one side of described former inner chamber material be the ferroalloy that contains 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 needs compacting.
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 needs compacting.
Left plate of the present invention and described right plate are provided with the recessed structure that cooperates with described division board in a side of described former inner chamber, and 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 is complementary 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 needs compacting, and the saturated polarization of described push-down head is consistent with the saturated polarization of the Magnaglo that needs compacting.
The present invention compared with prior art has following beneficial effect:
The present invention passes through the saturated polarization of at least one side material of former inner chamber consistent with the saturated polarization of magnetic material powder, make the edge twisted phenomena in magnetic field transfer on the side of the former inner chamber of being made by this material from magnetic material powder, the magnetic field that guarantees magnetic material powder is uniform magnetic field, guarantees the performance of the blank made 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 in different sides, applied widely, can not affect the compacting of Magnaglo.
Description of drawings
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.
Among the 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, be provided with the former inner chamber in the described former, 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 needs compacting.Wherein, can adjust the saturated polarization of the material of corresponding former inner chamber employing according to the distortion situation of the blank that suppresses, make its saturated polarization with the magnetic material powder that needs compacting consistent.
Described former includes a plurality of side plates, also can adopt the saturated polarization of adjusting a plurality of described side plates, makes its saturated polarization with the magnetic material powder that needs compacting consistent; The material of at least one side of described former inner chamber is for using cobalt as the carbide alloy of Binder Phase.
The material of at least one side plate of described former inner chamber is that to contain the cobalt amount be 15% carbide alloy or to contain the cobalt amount be the carbide alloy of 16%-20% or contain the carbide alloy that the cobalt amount is 22%-25%; Perhaps, the material of at least one side of described former inner chamber is the ferroalloy that contains half martensite, semiaustenitic, or at least one side of described former inner chamber material be the ferroalloy that contains 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 inboards are whole for adopting the saturated polarization material consistent with the saturated polarization of the magnetic material powder that needs compacting to make; Perhaps consistent with the saturated polarization of the magnetic material powder that needs compacting at the saturated polarization of the material of left plate 15 and right plate 16; Perhaps 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 needs compacting.
In this preferred embodiment, then preferably be respectively equipped with division board 18,19 on left side and the right side of described former inner chamber 17, described division board 18,19 saturated polarization are consistent with the saturated polarization of the magnetic material powder that needs compacting, described division board 18,19 covers left side and the right side of described former inner chamber respectively fully, by described division board 18,19 magnetic material powder is isolated with left plate 15 and right plate 16 fully.
From the angle in magnetic field, the magnetic line of force can form uniform magnetic field by two parallel magnetic conductive boards in the central area of two magnetic conductive boards, then can be owing 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, when not considering the magnetic property of magnetic, then only the area of plane of left plate 15 and right plate 16 need to be strengthened, then the magnetic field of center then can be thought uniformly, but behind the adding magnetic material powder, because magnetic material powder itself has certain magnetic conductivity, so also can twist at the magnetic line of force at magnetic material powder edge.The present invention arranges division board in the inboard 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 needs compacting, 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 on the division board from magnetic material powder, the magnetic field of having guaranteed magnetic material powder is uniform field, the performance of the blank of the magnetic material powder that assurance is suppressed out.
Described division board 18,19 material are for using cobalt as the carbide alloy of Binder Phase.The content of cobalt is higher, and then the saturated polarization of carbide alloy is higher, controls the saturated polarization of division board by the content of control cobalt, makes its saturated polarization consistent with the saturated polarization of magnetic material powder.Described division board 18,19 material are YG15 carbide alloy, YG16 carbide alloy, YG17 carbide alloy, YG18 carbide alloy, YG19 carbide alloy or YG20 carbide alloy.
Described division board 18,19 material also can be for containing the ferroalloy of half martensite, semiaustenitic, or the material of described division board is the ferroalloy that contains 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 then saturated polarization is lower.
For the ease of described division board 18 and described division board 19 being individually fixed in the inboard of described left plate 15 and described right plate 16, described left plate 15 is provided with the recessed structure that cooperates with described division board 18 in a side of described former inner chamber 17, described right plate 16 is provided with the recessed structure that cooperates 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 fully.
In the present embodiment, described magnetic material powder is the neodymium iron boron powder, and described division board 18,19 material are preferably the YG18 carbide alloy.Described seaming chuck 11 and described push-down head 12 also adopt the 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 is complementary with the shape of the blank that needs compacting.Four division boards form cylindrical body 21 as an overall structure, and are 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, when 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, with special-shaped blank corresponding to suitable 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 claim of the present invention.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, be provided with former inner chamber (17) in the described former, 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 needs compacting.
2. mold for molding magnetic material powder according to claim 1 is characterized in that, described former includes a plurality of side plates, and the saturated polarization of a plurality of described side plates is consistent with the saturated polarization of the magnetic material powder that needs compacting.
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 for using cobalt as the carbide alloy of Binder Phase.
4. mold for molding magnetic material powder according to claim 3, it is characterized in that, the material of at least one side plate of described former inner chamber (17) is that to contain the cobalt amount be 15% carbide alloy or to contain the cobalt amount be the carbide alloy of 16%-20% or contain the carbide alloy that the cobalt amount is 22%-25%.
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 that contains half martensite, semiaustenitic, or the material of at least one side of described former inner chamber is the ferroalloy that contains 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 needs compacting.
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 needs compacting.
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 that cooperates with described division board 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.
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) is complementary 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 needs compacting, and the saturated polarization of described push-down head (12) is consistent with the saturated polarization of the Magnaglo that needs compacting.
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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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|---|---|---|---|
| CN201210374171.1A CN102847938B (en) | 2012-10-07 | 2012-10-07 | Magnetic material powder forming mold |
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| CN102847938B CN102847938B (en) | 2014-07-02 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317130A (en) * | 2013-06-08 | 2013-09-25 | 徐州金石彭源稀土材料厂 | Mold for producing permanent magnet material radial columns and using method thereof |
| CN103447527A (en) * | 2013-08-07 | 2013-12-18 | 宁波韵升股份有限公司 | Magnet forming die |
| CN104139183A (en) * | 2014-06-30 | 2014-11-12 | 中磁科技股份有限公司 | Molding device and molding method for rare-earth permanent magnet material |
| CN106493360A (en) * | 2016-12-14 | 2017-03-15 | 京磁材料科技股份有限公司 | The compacting tool set of neodymium iron boron magnetic body |
| 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 |
| CN107718672A (en) * | 2017-10-26 | 2018-02-23 | 河北工业职业技术学院 | Powder presses sample making apparatus |
| 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 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317130A (en) * | 2013-06-08 | 2013-09-25 | 徐州金石彭源稀土材料厂 | Mold for producing permanent magnet material radial columns and using method thereof |
| 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 |
| CN104139183A (en) * | 2014-06-30 | 2014-11-12 | 中磁科技股份有限公司 | Molding device and molding method for rare-earth permanent magnet material |
| 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 |
| CN106493360A (en) * | 2016-12-14 | 2017-03-15 | 京磁材料科技股份有限公司 | The compacting tool set of neodymium iron boron magnetic body |
| 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 |
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| CN102847938B (en) | 2014-07-02 |
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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. |