CN212810048U - Orientation device of sintered neodymium iron boron multipole magnetic ring - Google Patents
Orientation device of sintered neodymium iron boron multipole magnetic ring Download PDFInfo
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- CN212810048U CN212810048U CN202022197690.8U CN202022197690U CN212810048U CN 212810048 U CN212810048 U CN 212810048U CN 202022197690 U CN202022197690 U CN 202022197690U CN 212810048 U CN212810048 U CN 212810048U
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Abstract
The utility model discloses an orientation device of sintered neodymium iron boron multipolar magnetic ring belongs to permanent magnet material preparation technical field. The orientation device is composed of an even number of sintered neodymium-iron-boron magnetic tiles which are uniformly distributed at intervals along the circumferential direction, and a die installation cavity is formed among the sintered neodymium-iron-boron magnetic tiles in a surrounding mode and used for installing a pressing die. Adopt the technical scheme of the utility model the multipolar magnetic ring of small-size sintering neodymium iron boron can be effectively produced, its manufacturing process is comparatively convenient, and equipment input cost is lower, and the multistage magnetic ring magnetic performance that makes is better, and its overall efficiency has effectively improved, can realize the batch production of the multipolar magnetic ring of small dimension.
Description
Technical Field
The utility model belongs to the technical field of permanent magnet material preparation, more specifically the utility model relates to an orientation device of sintered neodymium iron boron multipole magnetic ring.
Background
The sintered NdFeB multi-pole magnetic ring is a new product developed in recent years, is a new direction for the development of sintered NdFeB permanent magnet materials, is mainly applied to high-performance permanent magnet motors and sensors, has the advantages of high precision, stable operation, low noise and the like, is a first choice for controlling the motors at high rotating speed and high precision, and is widely applied to the fields of automation, digitization, intelligent equipment and the like of industrial equipment such as high-speed driving motors, servo motors and the like.
Compared with the traditional magnetic ring formed by splicing a plurality of tile-shaped magnetic blocks, the sintered NdFeB multi-pole magnetic ring has the following advantages: the overall magnetic performance is improved by 40-60%, the material utilization rate is high, and the manufacturing period is short. However, the manufacturing of the small-sized sintered neodymium iron boron multi-pole magnet ring is few at present, and the production technical difficulties mainly exist in the design of an oriented magnetic field and the design of a pressing mode under the orientation of the magnetic field. In the prior art, a multi-pole magnetic ring is produced mainly in a pulsed magnetic field orientation mode, a coil of a magnetic field press is arranged outside a die, and a current is introduced to the coil to provide a magnetic field, so that sintered neodymium iron boron powder in the die is oriented, the equipment investment cost is high, the coil power consumption is high, and when a small-size multi-pole magnetic ring is produced, the plurality of coils are difficult to arrange due to the small size of the magnetic ring, so that the small-size multi-pole magnetic ring cannot be produced effectively; meanwhile, the distribution of the oriented powder in the die is disturbed by adopting a pulse magnetic field orientation mode, the magnetic performance is relatively poor, and the efficiency is low.
Through retrieval, the application with the Chinese patent application number of 201210347350.6 discloses an orientation pressing device of a radial orientation magnetic ring and a manufacturing method thereof, wherein the orientation pressing device is arranged on a bracket of a press, and the press comprises an upper pressing head, a lower pressing head and a controller; the orientation pressing device comprises a female die and 3 excitation coils; the cross section of the female die is in a regular triangle shape, and the female die comprises an upper female die made of a magnetic conductive material and a lower female die made of a nonmagnetic metal material; the inner end faces of the 3 excitation coils are respectively connected with three side faces of the female die, cylindrical main yokes connected with the side faces of the female die are arranged in the excitation coils, the outer end faces of the main yokes are flush with the outer end faces of the excitation coils, and circular auxiliary yokes are arranged on the outer end faces of the main yokes and the outer end faces of the excitation coils. Although the application can realize the orientation pressing of the magnetic ring, the application mainly aims at the orientation pressing of the magnetic ring with a larger size, a small-size multi-pole magnetic ring cannot be effectively produced, and the overall design of the magnetic ring needs to be further improved.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
An object of the utility model is to solve the current production small-size sintering neodymium iron boron multipolar magnetic ring and make inconveniently, equipment input cost is high, and its magnetic performance is relatively poor, problem of inefficiency, provides an orienting device of sintering neodymium iron boron multipolar magnetic ring. Adopt the technical scheme of the utility model the multipolar magnetic ring of small-size sintering neodymium iron boron can be effectively produced, its manufacturing process is comparatively convenient, and equipment input cost is lower, and the multistage magnetic ring magnetic performance that makes is better, and its overall efficiency has effectively improved, can realize the batch production of the multipolar magnetic ring of small dimension.
2. Technical scheme
In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
the utility model discloses an orientation device of multipolar magnetic ring of sintered neodymium iron boron comprises the even number sintered neodymium iron boron magnetic shoe along the even interval distribution of circumferencial direction, and centers on forming the die holding chamber between the sintered neodymium iron boron magnetic shoe for install the embossing mold utensil.
Furthermore, the sintered NdFeB magnetic tiles comprise four sintered NdFeB magnetic tiles which are uniformly distributed at intervals along the circumferential direction.
Furthermore, the sintered neodymium iron boron magnetic tile is fixedly arranged inside the magnetic tile fixing ring.
Furthermore, be equipped with in the solid fixed ring of magnetic shoe with the quantity and the size assorted draw-in groove of sintered neodymium iron boron magnetic shoe, the sintered neodymium iron boron magnetic shoe is installed in the draw-in groove and along the solid fixed ring's of magnetic shoe circumferencial direction evenly distributed.
Furthermore, the inner wall of the magnetic tile fixing ring is provided with magnetic tile binding surfaces matched with the quantity and the size of the sintered neodymium iron boron magnetic tiles, and the magnetic tile binding surfaces are uniformly distributed along the circumferential direction of the magnetic tile fixing ring.
Furthermore, a gap reserved surface is arranged between the adjacent magnetic tile binding surfaces, the gap reserved surface is connected with the magnetic tile binding surfaces through clamping sections, and the magnetic tile binding surfaces and the clamping sections at the two ends of the magnetic tile binding surfaces form a clamping groove together.
Further, sintered neodymium iron boron magnetism tile is fan-shaped structure, and it includes outside binding face, inboard binding face, block face and connects the face, and outside binding face and the solid fixed ring's of magnetism tile binding face shape size phase-match of magnetism tile, inboard binding face and install in the laminating of the die cavity outer wall in the middle of it mutually, and the block face sets up in inboard binding face both ends to can laminate with the block section, connect the face both ends and connect block section and inboard binding face respectively.
3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses an orienting device of sintered neodymium iron boron multipole magnetic ring, permanent magnetism orienting device has been made by oneself through adopting solid fixed ring of magnetic shoe and the sintered neodymium iron boron magnetic shoe of even number, install sintered neodymium iron boron magnetic shoe in the solid fixed ring inside draw-in groove of magnetic shoe, thereby can effectively produce the multipolar magnetic ring of small-size sintered neodymium iron boron, avoided the tradition to adopt the multipolar magnetic ring of solenoid production small-size sintered neodymium iron boron to be difficult to arrange and the big problem of power consumption on the one hand, on the other hand provides permanent magnetic field, the relatively poor problem of magnetic ring magnetic property that adopts pulsed magnetic field orientation mode to lead to making has also been avoided, its manufacturing process is comparatively convenient, equipment input cost is lower, the multistage magnetic ring magnetic performance that makes is better.
(2) The utility model discloses an orientation device of multipolar magnetic ring of sintered neodymium iron boron, through with the fixed ring's of sintered neodymium iron boron magnetic shoe circumferencial direction evenly distributed along the magnetic shoe, the even symmetry of magnetic shoe distribution guarantees that the magnetic ring table magnetism that it produced distributes evenly. And a gap is arranged between the adjacent sintered neodymium iron boron magnetic tiles, so that the demagnetization phenomenon caused by the closed circuit of the magnetic tiles is avoided.
(3) The utility model discloses an orientation device of multipolar magnetic ring of sintered neodymium iron boron optimizes through concrete structure and the material to the solid fixed ring of magnetic shoe and sintered neodymium iron boron magnetic shoe to can tightly install sintered neodymium iron boron magnetic shoe in the solid fixed ring of magnetic shoe, guarantee the fastness of its installation. And the magnetic shoe fixing ring is provided with a clamping section, the sintered neodymium iron boron magnetic shoe is provided with a clamping surface, and the sintered neodymium iron boron magnetic shoe is tightly attached to the clamping section on the magnetic shoe fixing ring through the clamping surface on the sintered neodymium iron boron magnetic shoe, so that the sintered neodymium iron boron magnetic shoe can be effectively fixed, and the demagnetization caused by the closed circuit of the sintered neodymium iron boron magnetic shoe is avoided.
Drawings
FIG. 1 is a schematic structural view of an alignment device according to the present invention;
fig. 2 is a schematic structural view of the magnetic conductive ring of the present invention;
fig. 3 is a schematic structural view of the sintered nd-fe-b magnetic tile of the present invention;
fig. 4 is a schematic structural diagram of a pneumatic pressing system of the present invention;
fig. 5 is a schematic view of the magnetic performance of the sintered nd-fe-b quadrupole magnet ring manufactured by the orientation device of the present invention;
fig. 6 is a schematic diagram of the gap size in the orientation device for the orientation effect of the sintered nd-fe-b magnetic field.
In the figure: 1. an orientation device; 11. a magnetic shoe fixing ring; 111. an accommodating chamber; 112. a card slot; 113. a magnetic tile binding surface; 114. a clearance reservation surface; 115. a clamping section; 12. sintering the neodymium iron boron magnetic tiles; 121. an outer bonding surface; 122. an inner bonding surface; 123. a clamping surface; 124. a connecting surface; 13. a die mounting cavity; 14. a gap; 2. an upper pressure head; 3. a lower pressure head; 4. a mold cavity; 5. a fixed block; 6. a support platform; 61. a support plate; 62. and (5) supporting legs.
Detailed Description
At present, the manufacture of small-size sintered neodymium-iron-boron multi-pole magnetic rings is less, the multi-pole magnetic rings are mainly produced in a pulse magnetic field orientation mode in the prior art, when a magnetic field press is used for pressing, two coils of the press are arranged outside a die, a magnetic field is provided for the current to supply to the coils, so that the sintered neodymium-iron-boron powder in the die is oriented, the coils have high power consumption and high heat, and need to be cooled by a matched water cooling device, and the magnetic rings produced by the traditional press are mostly two-stage because the traditional press is only provided with two coils. In addition, in the prior art, the multi-pole magnetic ring is produced by adopting a pulse magnetic field orientation mode, so that the distribution of oriented powder in a die can be disturbed, the magnetic performance is relatively poor, and the efficiency is low.
To solve the above problems, the present invention provides an orienting device for a sintered ndfeb multipole magnet ring, which is described in detail with reference to the following embodiments.
Example 1
As shown in fig. 1 (fig. 1 is a schematic structural diagram of a four-level magnet ring orientation device), the orientation device 1 includes a tile fixing ring 11 and an even number of sintered ndfeb tiles 12, the tile fixing ring 11 is made of a magnetic conductive material (such as pure iron), the sintered ndfeb tiles 12 can be made of N52 high-remanence sintered ndfeb, the sintered ndfeb tiles 12 can be fixed on the tile fixing ring 11 in an adsorbing manner, and the higher the remanence of the sintered ndfeb tiles 12 is, the more excellent the magnetic field orientation of the pressed powder is. The fixed ring of magnetic shoe 11 is equipped with the draw-in groove 112 with the quantity and the size assorted of sintered neodymium iron boron magnetic shoe 12 in, and sintered neodymium iron boron magnetic shoe 12 installs in draw-in groove 112 and along the solid fixed ring of magnetic shoe 11's circumferencial direction evenly distributed. Permanent magnet orientation device 1 has been made oneself through adopting solid fixed ring 11 of magnetic shoe and 2n sintered neodymium iron boron magnetic shoe 12, install sintered neodymium iron boron magnetic shoe 12 in the draw-in groove 112 of solid fixed ring 11 inside of magnetic shoe, thereby can effectively produce the multipolar magnetic ring of small-size sintered neodymium iron boron, usable sintered neodymium iron boron magnetic shoe 12 orients the sintered neodymium iron boron powder in the die cavity 4 on the one hand, the problem that the conventional adoption solenoid production small-size sintered neodymium iron boron multipolar magnetic ring is difficult to arrange and power consumption is big has been avoided, on the other hand provides permanent magnetic field, the relatively poor problem of magnetic performance of magnetic ring that adopts pulsed magnetic field orientation mode to lead to making has also been avoided, its manufacturing process is comparatively convenient, equipment input cost is lower, the multistage magnetic ring magnetic performance that makes is better, its overall. And the sintered neodymium iron boron magnetic tiles 12 are uniformly and symmetrically distributed along the circumferential direction of the magnetic tile fixing ring 11, so that the magnetic tiles are uniformly and symmetrically distributed, and the uniform distribution of surface magnetism of the produced magnetic ring is ensured. A gap 14 is formed between the adjacent sintered NdFeB magnetic tiles 12, and the demagnetization phenomenon caused by the closed circuit of the magnetic tiles can be avoided by arranging the gap 14. The fixed ring 11 center of magnetic shoe encloses into mould installation cavity 13 through sintering neodymium iron boron magnetic shoe 13, installs die cavity 4 in the mould installation cavity 13, goes up pressure head 2 and lower pressure head 3, utilizes pressure head 2 and lower pressure head 3 can suppress the sintering neodymium iron boron powder of die cavity 4.
Specifically, as shown in fig. 2 (fig. 2 is a schematic structural view of a magnetic shoe fixing ring 11 of a four-stage magnetic ring orientation device), an accommodating cavity 111 is arranged in the magnetic shoe fixing ring 11 and is used for installing a sintered neodymium-iron-boron magnetic shoe 12; the inner wall of the magnetic shoe fixing ring 11 (namely the cavity wall of the accommodating cavity 111) is provided with arc-shaped magnetic shoe attaching surfaces 113, the number and the size of which are matched with those of the sintered neodymium iron boron magnetic shoes 12, and the magnetic shoe attaching surfaces 113 are uniformly and symmetrically distributed along the circumferential direction of the magnetic shoe fixing ring 11; a gap reserved surface 114 is arranged between the adjacent magnetic shoe binding surfaces 113, the gap reserved surface 114 is connected with the magnetic shoe binding surfaces 113 through clamping sections 115, namely the clamping sections 115 are arranged at two ends of each magnetic shoe binding surface 113, and the magnetic shoe binding surfaces 113 and the clamping sections 115 at the two ends form a clamping groove 112 together.
As shown in fig. 3 (fig. 3 is a schematic structural diagram of a sintered ndfeb magnetic tile 12 of a four-level magnetic ring orientation device), the sintered ndfeb magnetic tile 12 is a fan-shaped structure, and includes an outer attaching surface 121, an inner attaching surface 122, a clamping surface 123 and a connecting surface 124, the outer attaching surface 121 matches in shape and size with the magnetic tile attaching surface 113 of the magnetic tile fixing ring 11 and can be attached to the magnetic tile attaching surface 113, the inner attaching surface 122 is attached to the outer wall of the mold cavity 4, the clamping surface 123 is disposed at two ends of the inner attaching surface 122 and can be attached to the clamping section 115, two ends of the connecting surface 124 are respectively connected to the clamping section 115 and the inner attaching surface 122, the gap 14 is defined by the connecting surfaces 124 close to the two sintered ndfeb magnetic tiles 12, and the specific structures of the magnetic tile fixing ring 11 and the sintered ndfeb magnetic tiles 12 are optimized, so that the sintered ndfeb magnetic tiles 12 can be, the last block section 115 that is equipped with of the solid fixed ring of magnetic shoe 11 is equipped with the clamping face 123 on the sintered neodymium iron boron magnetic shoe 12, and through the block face 123 with on the sintered neodymium iron boron magnetic shoe 12 and the solid fixed ring of magnetic shoe 11 block section 115 closely laminating, the block section 115 that utilizes the solid fixed ring of magnetic shoe 11 can be with the chucking of sintered neodymium iron boron magnetic shoe 12 to can effectively fix sintered neodymium iron boron magnetic shoe 12, avoid its closed circuit to lead to the demagnetization. The part of the gap 14 close to the die mounting cavity 13 is wider, and the part close to the inner wall of the magnetic shoe fixing ring 11 is narrower, so that the orientation effect of the magnetic shoe fixing ring on the sintered neodymium iron boron magnetic field can be further effectively improved, and the specific contrast effect is shown in fig. 6.
The orientation device is designed differently because the magnetic rings of the special-shaped neodymium iron boron in each direction have different sizes and different pole numbers, for example, four sintered neodymium iron boron magnetic shoes 12 are required to be uniformly and symmetrically arranged in the magnetic shoe fixing ring 11 for a four-stage magnetic ring, six sintered neodymium iron boron magnetic shoes 12 are required to be uniformly and symmetrically arranged in the magnetic shoe fixing ring 11 for a six-stage magnetic ring, and the orientation device and the pressing die required by the magnetic rings with different sizes are different, so that the orientation device can be manufactured automatically according to the requirements.
Example 2
The structure of the orientation device for the sintered neodymium iron boron multi-pole magnetic ring is basically the same as that of the embodiment 1, and the orientation device is installed in a pneumatic pressing system and is used for manufacturing the small-size sintered neodymium iron boron multi-pole magnetic ring. As shown in fig. 4, the pneumatic pressing system includes the orientation device 1, a pressing mold and a supporting platform 6 described in embodiment 1, the orientation device 1 is fixedly installed on the supporting platform 6, the pressing mold includes an upper pressing head 2, a lower pressing head 3 and a mold cavity 4, the mold cavity 4 is an annular mold cavity, the mold cavity 4 is installed in a mold installation cavity 13 of the orientation device 1, and is attached to an inner side attachment surface 122 of the sintered ndfeb magnetic shoe 12; the upper pressure head 2 is correspondingly arranged above the die cavity 4, the lower pressure head 3 is correspondingly arranged below the die cavity 4, the upper pressure head 2 and the lower pressure head 3 are respectively fixedly connected with corresponding cylinder pistons, the upper pressure head 2 and the lower pressure head 3 are respectively driven by cylinders to move up and down in the die cavity 4, and the pressing surface areas of the upper pressure head 2 and the lower pressure head 3 are all matched with the cross sectional area of the die cavity 4. Supporting platform 6 is including fixed backup pad 61 and the supporting leg 62 that links to each other, and orientation device 1 passes through fixed block 5 fixed mounting on backup pad 61, be equipped with in the backup pad 61 with orientation device 1 in the corresponding hole of dodging of suppression hole size position of die cavity 4, lower pressure head 3 can pass and dodge the hole on backup pad 61 and move from top to bottom along die cavity 4. The supporting legs 62 comprise a plurality of, usually 4, and each supporting leg 62 is fixedly connected with a corresponding third cylinder piston, and the third cylinder is used for driving the supporting platform 6 to move up and down.
When the multipolar magnetic ring of preparation sintering neodymium iron boron, utilize the cylinder that links to each other with lower pressure head 3 to move lower edge department in the die cavity 4 with lower pressure head 3, utilize the cylinder that links to each other with last pressure head 2 upward movement break away from die cavity 4, put into in die cavity 4 after the sintering neodymium iron boron powder of will weighing out is unpacked, will go up pressure head 2 downward movement to the last edge department in die cavity 4 after that, utilize two cylinders to drive simultaneously last pressure head 2 and lower pressure head 3 to move at last, carry out two-way press forming. And taking out the pressed blank after the pressing is finished, keeping the lower pressing head 3 still, separating the upper pressing head 2 from the die cavity 4 in an upward movement manner, driving the supporting platform 6 to move downwards through the air cylinder connected with the supporting platform 6, driving the orientation device 1 to move downwards until the pressed blank is separated from the die cavity 4, taking out the pressed blank, carrying out isostatic pressing treatment on the pressed blank, carrying out high-temperature sintering and twice tempering treatment, and discharging to obtain the sintered NdFeB multipole magnetic column. And (3) performing outer circle machining, inner circle machining (trepanning and hole milling), end face grinding, chamfering, surface treatment and other procedures (the treatment procedures are the existing mature procedures, so that the description is not repeated here) on the finally obtained multi-pole magnetic column to obtain the small-size sintered neodymium iron boron multi-pole magnetic ring.
According to the small-size sintered neodymium iron boron multi-pole magnetic ring, the magnetizing device can be customized to magnetize the four-pole magnetic ring and perform surface magnetism test by adopting a magnetic field distribution tester. For example, the magnetic performance of the manufactured four-pole magnetic ring is shown in fig. 5, and as can be seen from fig. 5, the magnetic performance of the finally manufactured four-pole magnetic ring is better.
Claims (7)
1. An orientation device of sintered neodymium iron boron multipolar magnetic ring, characterized in that: the orientation device is composed of an even number of sintered neodymium iron boron magnetic tiles (12) which are uniformly distributed at intervals along the circumferential direction, and a die mounting cavity (13) is formed among the sintered neodymium iron boron magnetic tiles (12) in a surrounding mode and used for mounting a pressing die.
2. The orientation device of a sintered nd-fe-b multi-pole magnet ring as claimed in claim 1, wherein: the sintered NdFeB magnetic tiles (12) comprise four and are evenly distributed at intervals along the circumferential direction.
3. The orientation device of a sintered nd-fe-b multi-pole magnetic ring as claimed in claim 1 or 2, wherein: the sintered neodymium iron boron magnetic tile (12) is fixedly arranged inside the magnetic tile fixing ring (11).
4. The orientation device of a sintered NdFeB multi-pole magnet ring as claimed in claim 3, wherein: the fixed ring of magnetic shoe (11) is equipped with quantity and size assorted draw-in groove (112) with sintered neodymium iron boron magnetic shoe (12), sintered neodymium iron boron magnetic shoe (12) are installed in draw-in groove (112) and along the circumferencial direction evenly distributed of the fixed ring of magnetic shoe (11).
5. The orientation device of a sintered NdFeB multi-pole magnet ring as claimed in claim 4, wherein: the inner wall of the magnetic tile fixing ring (11) is provided with magnetic tile binding surfaces (113) matched with the quantity and the size of the sintered neodymium iron boron magnetic tiles (12), and the magnetic tile binding surfaces (113) are uniformly distributed along the circumferential direction of the magnetic tile fixing ring (11).
6. The orientation device of a sintered NdFeB multi-pole magnet ring as claimed in claim 5, wherein: a gap reserved surface (114) is arranged between the adjacent magnetic tile binding surfaces (113), the gap reserved surface (114) is connected with the magnetic tile binding surfaces (113) through clamping sections (115), and the magnetic tile binding surfaces (113) and the clamping sections (115) at the two ends of the magnetic tile binding surfaces form a clamping groove (112) together.
7. The orientation device of a sintered nd-fe-b multi-pole magnetic ring as claimed in claim 1 or 2, wherein: sintered neodymium iron boron magnetism tile (12) are fan-shaped structure, and it includes outside binding face (121), inboard binding face (122), clamping face (123) and connects face (124), and outside binding face (121) and the solid fixed ring's of magnetic shoe (11) magnetic shoe binding face (113) shape and size phase-match, inboard binding face (122) laminate mutually with install die cavity (4) outer wall in the middle of it, and clamping face (123) set up in inboard binding face (122) both ends to can laminate mutually with block section (115), connect face (124) both ends and connect block section (115) and inboard binding face (122) respectively.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410039A (en) * | 2021-06-18 | 2021-09-17 | 中国电子科技集团公司第九研究所 | Preparation method of multi-pole magnetic ring based on HALBACH structure |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410039A (en) * | 2021-06-18 | 2021-09-17 | 中国电子科技集团公司第九研究所 | Preparation method of multi-pole magnetic ring based on HALBACH structure |
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