CN204792409U - Shaping orientation device of sintered nd -Fe -B radiation ring - Google Patents
Shaping orientation device of sintered nd -Fe -B radiation ring Download PDFInfo
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- CN204792409U CN204792409U CN201520527357.5U CN201520527357U CN204792409U CN 204792409 U CN204792409 U CN 204792409U CN 201520527357 U CN201520527357 U CN 201520527357U CN 204792409 U CN204792409 U CN 204792409U
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- core bar
- conductive pole
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Abstract
The utility model discloses a shaping orientation device of sintered nd -Fe -B radiation ring. It includes the core bar, go up the pressure head, lower pressure head, the orientation coil, magnetic conduction pole and die, the core bar, go up the pressure head and install the inside at the die with lower pressure head, go up the pressure head and arrange the upper end of core bar lateral surface in, the lower extreme of core bar lateral surface is placed in to the pressure head down, go up the inboard of pressure head and pressure head down and the outside respectively with core bar and die sliding connection, the core bar, go up the pressure head, the cavity of forming between pressure head and the die down is the die cavity, the magnetic conduction pole is two, and just the symmetric distribution is just corresponding with the position of die cavity in the left and right sides of die, the magnetic conduction pole is installed in oriented coil. The beneficial effects of the utility model are that: adopt " symmetry bipolar orientation tied in a bundle " mode, let the equivalent magnetic field of bipolar production of symmetry, produce the stack humidification, improve oriented magnetic field, simultaneously, two equivalent magnetic fields of symmetry make the core bar can not produce the displacement to guarantee that the blank can not ftractureed by the core bar extrusion, has improved fashioned yield.
Description
Technical field
The utility model relates to sintered NdFeB radiation ring magnet correlative technology field, refers in particular to a kind of shaping aligning device of sintered NdFeB radiation ring.
Background technology
In known sintered NdFeB radiation ring magnet manufacture process, generally all adopt hot press forming technology, in the compressing process of product by heater to the single heating of Realization of Product, in heating process, hot orientation is carried out to magnetic and hot mutagenesis orientation solves the low problem of alignment magnetic field, thus obtaining hot-forming sintered NdFeB radiation ring magnet, Japanese Datong District electronics is exactly advocate and the practitioner of this technique.And at the same time, Ye You educational circles personage is from traditional Sintered NdFeB magnet producing shaped technique, adopt the radiation ring mode of production of the then collective's whole stove sintering of single product cold moudling traditionally, but suffer from the inadequate problem of the degree of orientation that cannot break through under this state of the art and have difficulty in taking a step.
Until someone proposes the magnetic field that moulding press oriented coils produces to utilize " point effect " one pole to import in toroidal mold in recent years, thus improve this situation preferably, but because shaping central point magnetic field is also only between 1.0 ~ 1.5T, be still present in the inadequate problem of the degree of orientation for needing with dysprosium, the high remanent magnetism of terbium element production, the sintered neodymium iron boron material of high-coercive force.Because the alignment magnetic field of 1.6T is Nd
2fe
14the theoretical orientation field of B, and for crystalline anisotropy field H
abe worth higher Dy
2fe
14b and Tb
2fe
14the such orientation field of B is obviously inadequate.
Meanwhile, owing to applying the shaping mould of this kind of mode, in order to effective application-oriented field, need magnetic conduction steel be adopted to carry out magnetic conduction the core bar of mould, thus form a field circuit.Like this, rotating because one pole orientation will inevitably make magnetic field produce attraction to the core bar of magnetic conduction in oriented moulding process, thus making core bar in die cavity, produce certain displacement and extrude magnet blank, obviously this produces irreversible deterioration by shaping rate of finished products.
Utility model content
The utility model there is above-mentioned deficiency to overcome in prior art, provides the high and shaping aligning device of the sintered NdFeB radiation ring that rate of finished products is high of a kind of alignment magnetic field.
To achieve these goals, the utility model is by the following technical solutions:
A kind of shaping aligning device of sintered NdFeB radiation ring, comprise core bar, seaming chuck, push-down head, oriented coils, magnetic conductive pole and die, described core bar, seaming chuck and push-down head are arranged on the inside of die, described seaming chuck is placed in the upper end of core bar lateral surface, described push-down head is placed in the lower end of core bar lateral surface, described seaming chuck and the inner side of push-down head and core bar are slidably connected, described seaming chuck and the outside of push-down head and die are slidably connected, described core bar, seaming chuck, the cavity formed between push-down head and die is the die cavity for placing sintered neodymium-iron-boron powder, described magnetic conductive pole is two and is symmetrically distributed in the left and right sides of die and corresponding with the position of die cavity, described magnetic conductive pole is arranged in oriented coils.
Sintered neodymium-iron-boron powder is added in the die cavity in die, by the lifting of push-down head, the powder Position Control in die cavity is being uniformly distributed along magnetic conductive pole two side, to ensure all even intensity of alignment magnetic field; Then regulate seaming chuck to make it just contact with the powder in die cavity but do not exert pressure, the power supply at this moment starting oriented coils makes coil generation magnetic field carry out orientation by magnetic conductive pole to the magnetic in die cavity.In sintered NdFeB radiation ring magnet cold moudling process, " the bipolar orientation of the symmetrical boundling " mode of employing, allow the magnetic field of symmetrical bipolar generation equivalent, such two magnetic fields are by generation superposition humidification, guarantee forming process in have sufficiently high alignment magnetic field, realize high remanent magnetism, high-coercive force sintered neodymium iron boron material radially oriented shaping; Meanwhile, producing what attract to the core bar in die cavity is the magnetic field of two symmetrical equivalent, and this just makes core bar to produce displacement, solve the problem of core bar displacement extrusion blank in oriented moulding process, improve shaping rate of finished products, improve the production efficiency of forming process, save production cost.
As preferably, described oriented coils is hollow, and described magnetic conductive pole is arranged on the hollow position place of oriented coils, and one end of described magnetic conductive pole is provided with threaded capstan, the other end of described magnetic conductive pole is near die cavity, and described oriented coils is placed in magnetic conductive pole one end near threaded capstan.Magnetic conductive pole is located and movement by threaded capstan, makes the interval of magnetic conductive pole and mould keep, between certain limit, being conducted in die cavity with the magnetic field energy ensuring some strength.
As preferably, described magnetic conductive pole is provided with round platform near one end of die cavity, and the height of described round platform is more than or equal to 2/3 of sintered neodymium-iron-boron powder height in die cavity.Effectively can improve the alignment magnetic field of sintered neodymium-iron-boron powder in die cavity.
As preferably, described round platform is rectangle near the end face of die, and described round platform is less than or equal to the height of die cavity near the end face length of die.The structural design of this round platform, makes the shape of this round platform similar to the nose shape of straight screwdriver, effectively can improve the alignment magnetic field of sintered neodymium-iron-boron powder in die cavity.
As preferably, the minimum range of described magnetic conductive pole and die is 0.3-1.0mm.Such design can be conducted in die cavity to ensure the high-intensity magnetic field being not less than 1.8T.
As preferably, described push-down head and die as a whole be that axle center rotates and is more than or equal to two circles along core bar.For ensureing the whole orientation of sintered neodymium-iron-boron powder, need by the push-down head except core bar, seaming chuck, oriented coils and magnetic conductive pole and die by realizing being greater than the rotation at 720 ° of angles under the drive that is mechanically connected to peripheral hardware motor, the general anglec of rotation 720 ° ~ 1440 ° namely two to four circles be advisable; After over-rotation orientation, close orientating power source start upper and lower pressure head pressing process, demagnetization power supply is opened again after completing the compacting of product, by the demagnetization of realizing product to oriented coils reverse current, do not show magnetic after product is taken out, be convenient to the operation of subsequent production process and improve rate of finished products.
The beneficial effects of the utility model are: adopt " the bipolar orientation of symmetrical boundling " mode, allow the magnetic field of symmetrical bipolar generation equivalent, and such two magnetic fields by generations superposition humidification, thus reach the object of raising alignment magnetic field; " the bipolar orientation of the symmetrical boundling " mode of employing, producing what attract to the magnetic conduction core bar in die cavity is the magnetic field of two symmetrical equivalent, this just makes core bar to produce displacement, thus ensures that therefore the blank in forming process by core bar extruding cracking, can not improve shaping rate of finished products.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the right view of round platform in Fig. 1.
In figure: 1. core bar, 2. seaming chuck, 3. push-down head, 4. oriented coils, 5. magnetic conductive pole, 6. die cavity, 7. threaded capstan, 8. round platform, 9. die.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
In embodiment as described in Figure 1, a kind of shaping aligning device of sintered NdFeB radiation ring, comprise core bar 1, seaming chuck 2, push-down head 3, oriented coils 4, magnetic conductive pole 5 and die 9, core bar 1, seaming chuck 2 and push-down head 3 are arranged on the inside of die 9, seaming chuck 2 is placed in the upper end of core bar 1 lateral surface, push-down head 3 is placed in the lower end of core bar 1 lateral surface, inner side and the core bar 1 of seaming chuck 2 and push-down head 3 are slidably connected, outside and the die 9 of seaming chuck 2 and push-down head 3 are slidably connected, core bar 1, seaming chuck 2, between push-down head 3 and die 9, the cavity of composition is the die cavity 6 for placing sintered neodymium-iron-boron powder, magnetic conductive pole 5 is two and is symmetrically distributed in the left and right sides of die 9 and corresponding with the position of die cavity 6, magnetic conductive pole 5 is arranged in oriented coils 4.Wherein: oriented coils 4 is hollow, magnetic conductive pole 5 is arranged on the hollow position place of oriented coils 4, and one end of magnetic conductive pole 5 is provided with threaded capstan 7, and the other end of magnetic conductive pole 5 is near die cavity 6, and oriented coils 4 is placed in magnetic conductive pole 5 one end near threaded capstan 7.Magnetic conductive pole 5 is provided with round platform 8 near one end of die cavity 6, round platform 8 is rectangle near the end face of die 9, so its shape is similar to the nose shape of straight screwdriver, round platform 8 is less than or equal to the height of die cavity 6 near the end face length of die 9, and the height of round platform 8 is more than or equal to 2/3 of sintered neodymium-iron-boron powder height in die cavity 6.Magnetic conductive pole 5 is 0.3-1.0mm with the minimum range of die 9, can be conducted in die cavity 6 to ensure the high-intensity magnetic field being not less than 1.8T.Push-down head 3 and die 9 as a whole along core bar 1 for axle center rotate be more than or equal to two circles.
On the basis meeting above condition, sintered neodymium-iron-boron powder is added in the die cavity 6 in die 9, by the lifting of push-down head 3, the powder Position Control in die cavity 6 is being uniformly distributed along magnetic conductive pole 5 two side, to ensure all even intensity of alignment magnetic field.Then seaming chuck 2 is regulated to make it just contact with the powder in die cavity 6 but do not exert pressure, at this moment the power supply starting oriented coils 4 makes oriented coils 4 produce magnetic field, orientation is carried out by the sintered neodymium-iron-boron powder in magnetic conductive pole 5 pairs of die cavitys 6, for ensureing that sintered neodymium-iron-boron powder whole orientation need by the push-down head 3 except core bar 1, seaming chuck 2, oriented coils 4 and magnetic conductive pole 5 and die 9 by realizing being greater than the rotation at 720 ° of angles under the drive that is mechanically connected to peripheral hardware motor, the general anglec of rotation 720 ° ~ 1440 ° namely two to four circles be advisable.After over-rotation orientation, close orientating power source startup seaming chuck 2 complete pressing process with push-down head 3, demagnetization power supply is opened again after completing the compacting of product, by the demagnetization of realizing product to oriented coils 4 one reverse currents, do not show magnetic after product is taken out, be convenient to the operation of subsequent production process and improve rate of finished products.By the sintered NdFeB radiation ring product obtained with upper type, because reaching the object improving alignment magnetic field, therefore can realize with the needs of trade mark magnetic production with brands of sintered Nd-Fe-B radiation ring product, and adopt " the bipolar orientation of symmetrical boundling " mode to make the rate of finished products of product reach more than 92%, its rate of finished products is improve 10% ~ 20% compared with other molding mode.
Embodiment 1:
Certain model sintered NdFeB radiation ring product of shaping Φ 56mm × Φ 40mm × 45mm.
By the distance regulating the interval of magnetic conductive pole 5 and mould to remain on 1.0mm, start orientating power source and regulate power supply size to ensure the alignment magnetic field being not less than 1.6T can be conducted in die cavity 6, confirming the effect regulated with teslameter.Ensure that the length at magnetic conductive pole 5 tip equals 2/3 of powder height in die cavity 6.On the basis meeting above condition, the sintered neodymium-iron-boron powder of this model is added in the die cavity 6 in die 9, by the lifting of push-down head 3, the powder Position Control in die cavity 6 is being uniformly distributed along magnetic conductive pole 5 two side, to ensure all even intensity of alignment magnetic field.Then seaming chuck 2 is regulated to make it just contact with the powder in die cavity 6 but do not exert pressure, at this moment start the power supply of oriented coils 4 to make coil produce magnetic field to carry out orientation by the powder in magnetic conductive pole 5 pairs of die cavitys 6, for ensureing that the whole orientation of powder need by the push-down head 3 except core bar 1, seaming chuck 2, oriented coils 4 and magnetic conductive pole 5 and die 9 by realizing the rotation at 720 ° of angles under the drive that is mechanically connected to peripheral hardware motor.After over-rotation orientation, close orientating power source startup seaming chuck 2 complete pressing process with push-down head 3, demagnetization power supply is opened again after completing the compacting of product, the size of demagnetization current is 1/10 of orientation electric current, by the demagnetization of realizing product to oriented coils 4 one reverse currents, do not show magnetic after the product of Φ 56mm × Φ 40mm × 45mm is taken out, the circumferential edges of product does not have the residual powder of burr and absorption.
By the sample of the blank 1mm × 1mm × 6mm of the product of forming after oversintering through the test of vibrating example magnetic field instrument, its magnetic property reaches the requirement of this model, for: Br=13.45kGs; Hcb=12.86kOe; Hcj=17.63kOe; (BH)=42.53MGOe.
Embodiment 2:
Certain model sintered NdFeB radiation ring product of shaping Φ 33mm × Φ 27mm × 25mm.
By the distance regulating the interval of magnetic conductive pole 5 and mould to remain on 0.3mm, start orientating power source and regulate power supply size to ensure alignment magnetic field being not less than 2.2T can be conducted in die cavity 6, confirming the effect regulated with teslameter.Ensure that the length at magnetic conductive pole 5 tip equals powder height in die cavity 6.On the basis meeting above condition, the sintered neodymium-iron-boron powder of this model is added in the die cavity 6 in die 9, by the lifting of mould push-down head 3, the powder Position Control in die cavity 6 is being uniformly distributed along magnetic conductive pole 5 two side, to ensure all even intensity of alignment magnetic field.Then mould seaming chuck 2 is regulated to make it just contact with the powder in die cavity 6 but do not exert pressure, at this moment start the power supply of oriented coils 4 to make coil produce magnetic field to carry out orientation by the magnetic in magnetic conductive pole 5 pairs of die cavitys 6, for ensureing that the whole orientation of magnetic need by the push-down head 3 except core bar 1, seaming chuck 2, oriented coils 4 and magnetic conductive pole 5 and die 9 by realizing the rotation at 1440 ° of angles under the drive that is mechanically connected to peripheral hardware motor.After over-rotation orientation, close orientating power source startup seaming chuck 2 complete pressing process with push-down head 3, demagnetization power supply is opened again after completing the compacting of product, the size of demagnetization current is 1/5 of orientation electric current, by the demagnetization of realizing product to oriented coils 4 one reverse currents, do not show magnetic after the product of Φ 33mm × Φ 27mm × 25mm is taken out, the circumferential edges of product does not have the residual powder of burr and absorption.
By the sample of the blank 1mm × 1mm × 2.5mm of the product of forming after oversintering through the test of vibrating example magnetic field instrument, its magnetic property reaches the requirement of this model, for: Br=12.33kG
s; Hcb=11.93kOe; Hcj=25.76kOe; (BH)=36.38MGOe.
Claims (6)
1. the shaping aligning device of a sintered NdFeB radiation ring, it is characterized in that, comprise core bar (1), seaming chuck (2), push-down head (3), oriented coils (4), magnetic conductive pole (5) and die (9), described core bar (1), seaming chuck (2) and push-down head (3) are arranged on the inside of die (9), described seaming chuck (2) is placed in the upper end of core bar (1) lateral surface, described push-down head (3) is placed in the lower end of core bar (1) lateral surface, described seaming chuck (2) and the inner side of push-down head (3) and core bar (1) are slidably connected, described seaming chuck (2) and the outside of push-down head (3) and die (9) are slidably connected, described core bar (1), seaming chuck (2), between push-down head (3) and die (9), the cavity of composition is the die cavity (6) for placing sintered neodymium-iron-boron powder, described magnetic conductive pole (5) is two and is symmetrically distributed in the left and right sides of die (9) and corresponding with the position of die cavity (6), described magnetic conductive pole (5) is arranged in oriented coils (4).
2. the shaping aligning device of a kind of sintered NdFeB radiation ring according to claim 1, it is characterized in that, described oriented coils (4) is hollow, described magnetic conductive pole (5) is arranged on the hollow position place of oriented coils (4), one end of described magnetic conductive pole (5) is provided with threaded capstan (7), the other end of described magnetic conductive pole (5) is near die cavity (6), and described oriented coils (4) is placed in magnetic conductive pole (5) one end near threaded capstan (7).
3. the shaping aligning device of a kind of sintered NdFeB radiation ring according to claim 1 and 2, it is characterized in that, described magnetic conductive pole (5) is provided with round platform (8) near one end of die cavity (6), and the height of described round platform (8) is more than or equal to 2/3 of the interior sintered neodymium-iron-boron powder height of die cavity (6).
4. the shaping aligning device of a kind of sintered NdFeB radiation ring according to claim 3, it is characterized in that, described round platform (8) is rectangle near the end face of die (9), and the end face length of the close die (9) of described round platform (8) is less than or equal to the height of die cavity (6).
5. the shaping aligning device of a kind of sintered NdFeB radiation ring according to claim 1 and 2, is characterized in that, described magnetic conductive pole (5) is 0.3-1.0mm with the minimum range of die (9).
6. the shaping aligning device of a kind of sintered NdFeB radiation ring according to claim 1 and 2, it is characterized in that, described push-down head (3) and die (9) as a whole along core bar (1) for axle center rotate be more than or equal to two circles.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527357.5U CN204792409U (en) | 2015-07-20 | 2015-07-20 | Shaping orientation device of sintered nd -Fe -B radiation ring |
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| CN201520527357.5U CN204792409U (en) | 2015-07-20 | 2015-07-20 | Shaping orientation device of sintered nd -Fe -B radiation ring |
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| CN204792409U true CN204792409U (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360268A (en) * | 2020-02-21 | 2020-07-03 | 浙江东阳东磁稀土有限公司 | Vertical forming die and forming method for sintered neodymium-iron-boron annular magnet |
-
2015
- 2015-07-20 CN CN201520527357.5U patent/CN204792409U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360268A (en) * | 2020-02-21 | 2020-07-03 | 浙江东阳东磁稀土有限公司 | Vertical forming die and forming method for sintered neodymium-iron-boron annular magnet |
| CN111360268B (en) * | 2020-02-21 | 2022-04-22 | 浙江东阳东磁稀土有限公司 | Vertical forming die and forming method for sintered neodymium-iron-boron annular magnet |
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