CN116313476A - Radiation magnetic field heat treatment device and radiation magnetic field heat treatment method for permanent magnet ring - Google Patents
Radiation magnetic field heat treatment device and radiation magnetic field heat treatment method for permanent magnet ring Download PDFInfo
- Publication number
- CN116313476A CN116313476A CN202310195836.0A CN202310195836A CN116313476A CN 116313476 A CN116313476 A CN 116313476A CN 202310195836 A CN202310195836 A CN 202310195836A CN 116313476 A CN116313476 A CN 116313476A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- pole head
- magnet ring
- salient pole
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention provides a radiation magnetic field heat treatment device and a radiation magnetic field heat treatment method of a permanent magnet ring, belonging to the technical field of permanent magnet material preparation, comprising the following steps: the heating unit comprises a shell and a heating element, a working cavity is arranged in the shell, and the heating element is arranged in the working cavity and is used for generating a heat treatment environment in the working cavity; salient pole heads penetrating through the inner holes of the permanent magnet rings; the concave pole head is provided with an accommodating hole for accommodating the permanent magnet ring; the salient pole head and the concave pole head in the working state have magnetism, and the magnetic poles of the salient pole head and the concave pole head are opposite; when the salient pole head is close to the concave pole head, the salient pole head is inserted into the accommodating hole, an annular accommodating part for accommodating the permanent magnet ring is formed between the peripheral surface of the salient pole head and the outline of the accommodating hole, and the salient pole head and the concave pole head form a radial magnetic field in the annular accommodating part through opposite magnetic poles. The beneficial effects of the invention are as follows: the device can provide a high-temperature heat treatment environment and a radial magnetic field, and the requirement of heat treatment of the permanent magnet ring in the radial magnetic field is met.
Description
Technical Field
The invention belongs to the technical field of permanent magnet material preparation, relates to a radiation magnetic field heat treatment device of a permanent magnet ring, and further relates to a radiation magnetic field heat treatment method.
Background
The radiation magnetic ring (permanent magnet ring) plays an irreplaceable role as an important device in the fields of motors, medical treatment, communication industry and inertial navigation, and the complexity of the application environment brings higher requirements on the magnetic performance of the radiation ring.
At present, some manufacturing methods of radiation magnetic rings exist, for example, a patent with the application number of CN200810226970.8 is named as a treatment method of R-T-B alloy powder for the radiation magnetic rings, and a scheme for preparing the permanent magnetic rings by using a powder metallurgy method is disclosed, wherein magnetic field orientation is carried out on magnetic powder in a radiation magnetic field press to form blanks, so that the magnetic powder is easy to be magnetized and distributed along radial radiation, and then the blanks are subjected to heat treatment; according to the method, the radiation magnetizing machine is utilized for carrying out radiation orientation magnetizing to obtain the radiation oriented radiation ring, the radiation magnetic ring prepared by the powder metallurgy process is required to be subjected to radiation magnetic field orientation firstly and then heat treatment is carried out to obtain the permanent magnet ring, the permanent magnet ring is not suitable for permanent magnets with phase change induced by magnetic field conditions, part of high-performance permanent magnets are usually prepared by adopting a casting process, the radiation magnetic field heat treatment is required to be carried out under high-temperature magnetic field conditions to precipitate radial precipitated phases, and the conventional rare earth radiation permanent magnet ring preparation process cannot meet the conditions of the permanent magnet ring of the casting process.
In addition, the invention patent with the application number of CN201310242575.X is named as a radial magnetic ring and a preparation method thereof, the method utilizes a conventional magnetic field orientation press to press magnetic powder into blocks, the easy magnetization direction of the magnetic powder is consistent with the horizontal magnetic field direction, then the blocks are subjected to heat treatment, the blocks are processed into magnetic tiles, the magnetic tiles are bonded and spliced into magnetic rings by colloid, and are magnetized by a radiation magnetizer to obtain spliced radiation rings with radiation orientation, the magnetic rings obtained by the splicing method are easy to have the phenomenon that the middle surface magnetic field is higher and the two sides surface magnetic field is lower after being magnetized, although the surface magnetic consistency can be improved by reducing the size of the magnetic tiles or modifying the edge parts of the magnetic tiles, so that the complexity of the preparation process can be improved.
The alnico permanent magnetic material has been widely used in the important fields of instruments, meters, travelling wave tubes, sensors, etc. by virtue of the comprehensive properties of high service temperature, excellent temperature stability, mechanics, corrosion resistance, etc., the alnico material changes phase at 600-860 ℃ and is guided to directionally separate out the separated phase under the action of a magnetic field, so that the magnetic performance can be further improved, and the complex application environment enables the magnetic signal of the alnico radiating ring to be changeable in the use process, so that the radiating ring can provide a changeable magnetic state to adapt to the complex environment in the radiating magnetic field heat treatment process, and the widely applied alnico radiating ring also provides higher requirements for the radiating magnetic field heat treatment efficiency.
Therefore, the AlNiCo permanent magnet ring needs to be subjected to phase precipitation by utilizing a radiation magnetic field under a high temperature condition, and a radiation magnetic field heat treatment process is an important link for preparing the high-performance AlNiCo radiation ring and improving the precision of a magnetic device, but equipment and a method for solving the problem of magnetic field heat treatment of the AlNiCo permanent magnet ring under the high temperature condition are lacking in the prior art.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a radiation magnetic field heat treatment device and a radiation magnetic field heat treatment method of a permanent magnet ring.
The aim of the invention can be achieved by the following technical scheme: a radiant magnetic field heat treatment device for a permanent magnet ring, comprising:
a heating unit comprising a housing having a working chamber disposed therein, the heating element being mounted within the working chamber and adapted to create a heat treatment environment within the working chamber;
salient pole heads penetrating through the inner holes of the permanent magnet rings;
the concave pole head is provided with an accommodating hole for accommodating the permanent magnet ring;
the salient pole head and the concave pole head are both positioned in the working cavity and can be close to or far away from each other, and the salient pole head and the concave pole head in the working state have magnetism and have opposite magnetic poles; when the salient pole head is close to the concave pole head, the salient pole head is inserted into the accommodating hole, an annular accommodating part for accommodating the permanent magnet ring is formed between the peripheral surface of the salient pole head and the outline of the accommodating hole, and a radial magnetic field is formed between the salient pole head and the concave pole head through opposite magnetic poles in the annular accommodating part.
Preferably, the permanent magnet ring is an alnico permanent magnet ring or an iron-chromium-cobalt permanent magnet ring, and the permanent magnet ring induces and separates out radial precipitated phases by utilizing the radial magnetic field in a heat treatment environment in the working cavity.
Preferably, the salient pole heads are aligned with the accommodation holes, and the center line of the salient pole heads is disposed coaxially with the center line of the accommodation holes.
Preferably, one end of the salient pole head, which is close to the accommodating hole, is set into a cone-like structure, the outer peripheral surface of which is formed by arc curve rotation, the diameter of the salient pole head is gradually increased along the axis direction of the salient pole head from one end of the salient pole head, which is close to the accommodating hole, to one end of the salient pole head, which is far away from the accommodating hole, is provided with an arc chamfer.
Preferably, the magnetic poles of the salient pole head and the concave pole head in the working state are respectively N pole and S pole or S pole and N pole.
Preferably, the magnetic field strength-adjustable salient pole machine further comprises a first base and a second base, wherein the salient pole head is detachably connected with the first base, the concave pole head is detachably connected with the second base, and the first base and the second base are all electromagnetic pieces capable of adjusting the magnetic field strength.
Preferably, the salient pole head and the concave pole head are made of materials with low heat conductivity and high magnetic conductivity.
Preferably, the top end of the salient pole head in the working state extends out of the inner hole of the permanent magnet ring.
The radiation magnetic field heat treatment method comprises the radiation magnetic field heat treatment device of the permanent magnet ring, and further comprises the following steps:
s1: heating the working chamber, and heating the working chamber to a set temperature by using a heating element so as to form a heat treatment environment in the working chamber;
s2: sleeving the permanent magnet ring to the salient pole head, so that the wall surface of the inner hole of the permanent magnet ring is tightly contacted with the outer peripheral surface of the salient pole head, and at the moment, the top end part of the salient pole head extends out of the inner hole of the permanent magnet ring;
s3: the salient pole head is close to the concave pole head so that the salient pole head is inserted into the accommodating hole of the concave pole head, the outline of the permanent magnet ring on the salient pole head is attached to the wall surface of the accommodating hole, and therefore the permanent magnet ring is positioned in the annular accommodating part;
s4: the salient pole head and the concave pole head are communicated with a magnetic circuit, a radial magnetic field is formed at the annular accommodating part through magnetic poles opposite to the salient pole head and the concave pole head, and meanwhile, the permanent magnet ring is kept for a certain time in the radial magnetic field and a heat treatment environment, so that the permanent magnet ring is induced to separate out a radial precipitated phase;
s5: disconnecting the magnetic circuit, and enabling the salient pole head and the concave pole head to be far away so as to separate the permanent magnet ring from the accommodating hole;
s6: and (3) tempering the permanent magnet ring, taking the permanent magnet ring off the salient pole head, placing the permanent magnet ring in a heat treatment furnace, preserving heat for a preset time, and then cooling to room temperature along with the furnace and taking out the permanent magnet ring.
Preferably, the method further comprises step S7: and (3) magnetizing the permanent magnet ring, namely performing radiation magnetizing on the permanent magnet ring by adopting radiation pulse equipment, and testing the surface magnetic parameters of the permanent magnet ring by utilizing a three-dimensional surface magnetic instrument.
Compared with the prior art, the invention has the beneficial effects that:
1. the device can provide a high-temperature heat treatment environment and a radial magnetic field, and the requirement of heat treatment of the permanent magnet ring in the radial magnetic field is met.
2. The salient pole head is arranged to be of a cone-like structure, so that the magnetic field is distributed more uniformly, the magnetic field strength is stronger, the radial magnetic field is more uniform and the strength is stronger, and the concave pole head is provided with an arc chamfer to avoid magnetic leakage during working.
3. Because the first base and the second base are electromagnetic parts (electromagnets), the intensity of the radial magnetic field and the magnetic field holding time can be adjusted by controlling the current, the adjustment is convenient in the radiation magnetic field heat treatment process, and the heat treatment requirement of the permanent magnet ring under different radiation magnetic field intensities is met.
4. The salient pole heads and the central line of the concave pole heads are coaxially arranged, so that the requirements of concentric placement of the permanent magnet rings and uniform radiation magnetic field provision can be met, and the surface magnetic uniformity of the permanent magnet rings is improved.
Drawings
Fig. 1 is a schematic view of a salient pole head and a female pole head of the present invention when they are close to each other.
Fig. 2 is a schematic view of the salient pole head and the female pole head of the present invention in a state of being far away.
Fig. 3 is a schematic diagram of the heat treatment of the permanent magnet ring in the radial magnetic field.
Fig. 4 is a schematic view of the salient pole head of the present invention when a radial magnetic field is formed in the accommodation hole.
Fig. 5 is a schematic structural diagram of a permanent magnet ring in a magnetized state according to the present invention.
Fig. 6 is a schematic structural diagram of the magnetization state of the first comparative example.
Fig. 7 is a schematic structural diagram of the magnetization state of the second comparative example.
100, a housing; 110. a heating element; 120. a working chamber; 200. a first base; 210. salient pole heads; 211. a distal end portion; 300. a second base; 310. a concave pole head; 311. a receiving hole; 400. a permanent magnet ring; 500. an annular receiving portion.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Embodiment one:
as shown in fig. 1 to 5, a radiation magnetic field heat treatment device of a permanent magnet ring includes: a heating unit including a housing 100 and a heating element 110, the housing 100 having a working chamber 120 disposed therein, the heating element 110 being installed in the working chamber 120 and being used to create a heat treatment environment in the working chamber 120, a salient pole head 210, and a female pole head 310; salient pole heads 210 for passing through the inner holes of the permanent magnet rings 400; a concave pole head 310, wherein the concave pole head 310 is provided with a containing hole 311 for containing the permanent magnet ring 400; wherein, the salient pole head 210 and the concave pole head 310 are both positioned in the working cavity 120 and can approach or separate from each other, and the salient pole head 210 and the concave pole head 310 have magnetism in the working state and have opposite magnetic poles; when the salient pole head 210 approaches the concave pole head 310, the salient pole head 210 is inserted into the accommodating hole 311, and an annular accommodating part 500 for accommodating the permanent magnet ring 400 is formed between the circumferential surface of the salient pole head 210 and the contour of the accommodating hole 311, and the salient pole head 210 and the concave pole head 310 form a radial magnetic field in the annular accommodating part 500 through opposite magnetic poles.
In this embodiment, the salient pole head 210 and the female pole head 310 can be close to or far from each other, the permanent magnet ring 400 can be fixed in the annular accommodating portion 500 when the salient pole head 210 is close to the female pole head 310, and the heat-treated permanent magnet ring 400 can be taken out when the salient pole head 210 is far from the female pole head 310; the heating element 110 is preferably based on the principle of achieving a heating effect, such as an electrothermal tube, and the heating element 110 can generate a high temperature in the working chamber 120 to form a heat treatment environment.
During heat treatment of the permanent magnet ring 400, the salient pole head 210 can be penetrated into the inner hole of the permanent magnet ring 400 until the salient pole head 210 is tightly attached to the inner hole of the permanent magnet ring 400, the permanent magnet ring 400 is positioned in the accommodating hole 311, the outline of the permanent magnet ring 400 is tightly attached to the accommodating hole 311, the permanent magnet ring 400 is limited in the annular accommodating part 500, more specifically, the salient pole head 210 is inserted into the inner hole of the permanent magnet ring 400, the concave pole head 310 surrounds the periphery of the permanent magnet ring 400, so that the salient pole head 210 and the concave pole head 310 form inner and outer corresponding arrangement at this time, as the magnetic poles of the salient pole head 210 and the concave pole head 310 are opposite in working state, a radial magnetic field penetrating through the annular accommodating part 500 can be formed, the permanent magnet ring 400 can be subjected to heat treatment in the radial magnetic field in the working cavity 120 under the high-temperature heat treatment environment, and radial precipitated phases are induced, and the radiation surface magnetism and radiation surface magnetism uniformity of the permanent magnet ring 400 are improved.
The device can provide a high-temperature heat treatment environment and a radial magnetic field, so that the requirement of heat treatment of the permanent magnet ring 400 in the radial magnetic field is met, the permanent magnet ring 400 is subjected to heat treatment of the radial magnetic field in the radial magnetic field, and the radiation surface magnetism uniformity of the permanent magnet ring 400 can be improved.
In this embodiment, the salient pole head 210 and the concave pole head 310 in the working state have magnetism and have opposite magnetic poles, specifically, the magnetic poles of the salient pole head 210 and the concave pole head 310 are respectively N pole and S pole or S pole and N pole.
Embodiment two:
as shown in fig. 1 to 5, the present embodiment defines a permanent magnet ring 400 on the basis of the first embodiment, the permanent magnet ring 400 is configured as an alnico permanent magnet ring 400 or an fechronico permanent magnet ring 400, and the permanent magnet ring 400 induces precipitation of a radial precipitated phase in a heat treatment environment in the working chamber 120 by using the radial magnetic field.
Embodiment III:
as shown in fig. 1 to 4, the present embodiment refines the positional relationship of the salient pole head 210 and the female pole head 310 on the basis of the first embodiment, the salient pole head 210 is aligned with the accommodation hole 311, and the center line of the salient pole head 210 is disposed coaxially with the center line of the accommodation hole 311.
In the present embodiment, the salient pole head 210 and the female pole head 310 may move in the axial direction of the central axis so as to approach or separate from each other.
The salient pole heads 210 and the central line of the concave pole head 310 are coaxially arranged, so that the requirements of concentric placement of the permanent magnet ring 400 and uniform radiation magnetic field provision can be met, and the surface magnetic uniformity of the permanent magnet ring 400 can be improved.
Embodiment four:
as shown in fig. 1-3, the present embodiment refines the shapes of the salient pole head 210 and the concave pole head 310 on the basis of the first embodiment, wherein one end of the salient pole head 210, which is close to the accommodating hole 311, is provided with a cone-like structure, the outer circumferential surface of which is formed by arc curve rotation, the diameter of the salient pole head 210 gradually increases from one end of the salient pole head 210, which is close to the accommodating hole 311, to one end of the salient pole head 310, which is far from the accommodating hole 311, along the axial direction of the salient pole head, and one end of the concave pole head 310, which is close to the salient pole head 210, is provided with an arc chamfer.
The salient pole head 210 is not a standard cone structure, but a cone-like structure formed by rotating an arc curve on the outer circumferential surface, and the salient pole head 210 is arranged in a shape of the arc circumferential surface, so that the magnetic field can be distributed more uniformly, the magnetic field strength is stronger, the radial magnetic field is more uniform and the strength is stronger, and the radial precipitation phase induced and precipitated by the radial magnetic field is more uniform.
The end of the concave pole head 310, which is close to the salient pole head 210, is provided with an arc chamfer, so that the end of the concave pole head is smoother, and the magnetic leakage of the concave pole head 310 during working is avoided.
Preferably, the top end 211 of the salient pole head 210 in the working state protrudes from the inner hole of the permanent magnet ring 400.
The diameter of the tip end 211 is slightly smaller than the diameter of the inner hole of the permanent magnet ring 400, and when the permanent magnet ring 400 is mounted on the salient pole head 210, the tip end 211 protrudes from the inner hole of the permanent magnet ring 400.
Fifth embodiment:
as shown in fig. 1-3, the magnetic field strength-adjustable salient pole machine further comprises a first base 200 and a second base 300, wherein the salient pole head 210 is detachably connected with the first base 200, the concave pole head 310 is detachably connected with the second base 300, and the first base 200 and the second base 300 are both electromagnetic members capable of adjusting the magnetic field strength.
Because the first base 200 and the second base 300 are electromagnetic members, the intensity of the radial magnetic field and the magnetic field holding time can be adjusted by controlling the current, and the adjustment is convenient in the radiation magnetic field heat treatment process, thereby meeting the heat treatment requirement of the permanent magnet ring 400 under different radiation magnetic field intensity conditions.
Preferably, the salient pole head 210 and the salient pole head 310 are made of a material having both low thermal conductivity and high magnetic permeability. For example, the salient pole head 210 and the female pole head 310 may be made of iron-cobalt-vanadium alloy or iron-cobalt alloy or pure iron.
It should be further appreciated that the housing 100 may be made of a material having both high temperature resistance and thermal insulation properties, such as mullite or boron nitride.
As shown in fig. 1-5, there is also provided a radiation magnetic field heat treatment method, including the radiation magnetic field heat treatment device of a permanent magnet ring, further including the steps of:
s1: heating the working chamber, and heating the working chamber to a set temperature by using a heating element so as to form a heat treatment environment in the working chamber;
s2: sleeving the permanent magnet ring to the salient pole head, so that the wall surface of the inner hole of the permanent magnet ring is tightly contacted with the outer peripheral surface of the salient pole head, and at the moment, the top end part of the salient pole head extends out of the inner hole of the permanent magnet ring;
s3: the salient pole head is close to the concave pole head so that the salient pole head is inserted into the accommodating hole of the concave pole head, the outline of the permanent magnet ring on the salient pole head is attached to the wall surface of the accommodating hole, and therefore the permanent magnet ring is positioned in the annular accommodating part;
s4: the salient pole head and the concave pole head are communicated with a magnetic circuit, a radial magnetic field is formed at the annular accommodating part through magnetic poles opposite to the salient pole head and the concave pole head, and meanwhile, the permanent magnet ring is kept for a certain time in the radial magnetic field and a heat treatment environment, so that the permanent magnet ring is induced to separate out a radial precipitated phase;
s5: disconnecting the magnetic circuit, and enabling the salient pole head and the concave pole head to be far away so as to separate the permanent magnet ring from the accommodating hole;
s6: and (3) tempering the permanent magnet ring, taking the permanent magnet ring off the salient pole head, placing the permanent magnet ring in a heat treatment furnace, preserving heat for a preset time, and then cooling to room temperature along with the furnace and taking out the permanent magnet ring.
Preferably, the temperature of the heat treatment environment is 550-600 ℃; in the step S4, the magnetic field strength of the radial magnetic field is more than or equal to 2000Oe, and the heat preservation time is more than or equal to 10min; in step S6, the tempering process of the permanent magnet ring 400 is to keep the temperature at 600-630 ℃ for 3-5h, or 570-600 ℃ for 6-9h, or 540-570 ℃ for 9-16h.
There is also provided a step of radiation magnetizing, further comprising a step S7: the permanent magnet ring 400 is magnetized, the permanent magnet ring 400 is magnetized by radiation by adopting radiation pulse equipment, and the three-dimensional meter magnetometer is used for testing the meter magnetic parameters of the permanent magnet ring 400.
In step S7, the magnetizing voltage of the radiation pulse device is adjusted to 1000V, the radiation pulse device is used to perform radiation magnetizing on the permanent magnet ring 400, and the three-dimensional meter magnetometer is used to test the radiation magnetizing direction meter magnetic parameters of the permanent magnet ring 400.
Example six:
the embodiment is a specific implementation manner of a radiation magnetic field heat treatment method, the selected permanent magnet ring 400 is an alnico 5 material, the cast ingot is an isotropic cast ingot, the cast ingot is processed into a permanent magnet ring 400 with the phi of 20mm x 10mm x 8mm, the permanent magnet ring 400 is insulated for 10min at 1260 ℃, then air cooling and cooling are performed at the speed of 8 ℃/s, the first base 200 and the second base 300 are both made of iron-cobalt-vanadium materials, the shell 100 is made of mullite, and the heat treatment method of the alnico permanent magnet ring 400 for radiation magnetic field comprises the following steps:
1. heating the working chamber 120 to 600 ℃;
2. cooling the alnico permanent magnet ring 400 to 800 ℃;
3. an alnico permanent magnet ring 400 at 800 ℃ is sleeved on the salient pole head 210 of the first base 200, so that one end of the permanent magnet ring 400 is ensured to be in close contact with the salient pole head 210 of the first base 200, and the top end 211 just comes out from the other end of the permanent magnet ring 400;
4. rapidly moving the first base 200 toward the second base 300 to ensure that the accommodating hole 311 just wraps the alnico permanent magnet ring 400;
5. the magnetic circuit is communicated, the magnetic field intensity is regulated to 2000Oe, and the magnetic circuit is kept for 13min;
6. the magnetic circuit is disconnected, the first base 200 is moved reversely, and the alnico permanent magnet ring 400 is ensured to be completely exposed out of the second base 300;
7. the alnico permanent magnet ring 400 is taken off from the salient pole head 210, placed in heat treatment, kept for a period of time, cooled to room temperature along with a furnace, and the heat preservation process parameters are 630 ℃ for 3 hours, 600 ℃ for 6 hours and 570 ℃ for 9 hours;
8. processing the permanent magnet ring 400 into a permanent magnet ring 400 with the size phi 18mm phi 12mm phi 6mm by using a surface grinder and an internal and external circular grinder;
9. the radiation pulse equipment is used for carrying out radiation magnetization on the alnico permanent magnet ring 400, and a three-dimensional meter magnetic instrument is used for testing the radiation magnetization direction meter magnetic parameters of the alnico permanent magnet ring 400.
Embodiment seven:
the embodiment is a specific implementation manner of a radiation magnetic field heat treatment method, the selected permanent magnet ring 400 is an alnico 5-type material, the cast ingot is an isotropic cast ingot, the cast ingot is processed into the permanent magnet ring 400 with the phi of 20mm x 10mm x 8mm, the permanent magnet ring 400 is insulated for 10min at the temperature of 1260 ℃, then air cooling is performed at the speed of 8 ℃/s, the first base 200 and the second base 300 are both made of iron-cobalt-vanadium materials, the shell 100 is made of mullite, and the heat treatment method of the alnico permanent magnet ring 400 for radiation magnetic field comprises the following steps:
1. heating the working chamber 120 to 550 ℃;
2. cooling the alnico permanent magnet ring 400 to 810 ℃;
3. an alnico permanent magnet ring 400 at 810 ℃ is sleeved on the salient pole head 210 of the first base 200, so that one end of the permanent magnet ring 400 is ensured to be in close contact with the salient pole head 210 of the first base 200, and the top end 211 just comes out from the other end of the permanent magnet ring 400;
4. rapidly moving the first base 200 toward the second base 300 to ensure that the accommodating hole 311 just wraps the alnico permanent magnet ring 400;
5. the magnetic circuit is communicated, the magnetic field intensity is regulated to 3500Oe, and the magnetic circuit is kept for 12min;
6. the magnetic circuit is disconnected, the first base 200 is moved reversely, and the alnico permanent magnet ring 400 is ensured to be completely exposed out of the second base 300;
7. the alnico permanent magnet ring 400 is taken off from the salient pole head 210, placed in heat treatment, kept for a period of time, cooled to room temperature along with a furnace, and the heat preservation process parameters are 620 ℃ for 4h,580 ℃ for 6h and 560 ℃ for 12h;
8. processing the permanent magnet ring 400 into a permanent magnet ring 400 with the size phi 18mm phi 12mm phi 6mm by using a surface grinder and an internal and external circular grinder;
9. the radiation pulse equipment is used for carrying out radiation magnetization on the alnico permanent magnet ring 400, and a three-dimensional meter magnetic instrument is used for testing the radiation magnetization direction meter magnetic parameters of the alnico permanent magnet ring 400.
Example eight:
the embodiment is a specific implementation manner of a radiation magnetic field heat treatment method, the selected permanent magnet ring 400 is an alnico 5-type material, the cast ingot is an isotropic cast ingot, the cast ingot is processed into the permanent magnet ring 400 with the phi of 20mm x 10mm x 8mm, the permanent magnet ring 400 is insulated for 10min at the temperature of 1260 ℃, then air cooling is performed at the speed of 8 ℃/s, the first base 200 and the second base 300 are both made of iron-cobalt-vanadium materials, the shell 100 is made of mullite, and the heat treatment method of the alnico permanent magnet ring 400 for radiation magnetic field comprises the following steps:
1. heating the working chamber 120 to 550 ℃;
2. cooling the alnico permanent magnet ring 400 to 820 ℃;
3. an aluminum nickel cobalt permanent magnet ring 400 at 820 ℃ is sleeved on the salient pole head 210 of the first base 200, so that one end of the permanent magnet ring 400 is ensured to be in close contact with the salient pole head 210 of the first base 200, and the top end 211 just comes out from the other end of the permanent magnet ring 400;
4. rapidly moving the first base 200 toward the second base 300 to ensure that the accommodating hole 311 just wraps the alnico permanent magnet ring 400;
5. the magnetic circuit is communicated, the magnetic field intensity is regulated to 3500Oe, and the magnetic circuit is kept for 12min;
6. the magnetic circuit is disconnected, the first base 200 is moved reversely, and the alnico permanent magnet ring 400 is ensured to be completely exposed out of the second base 300;
7. the alnico permanent magnet ring 400 is taken off from the salient pole head 210, placed in heat treatment, kept for a period of time, cooled to room temperature along with a furnace, and the heat preservation process parameters are 610 ℃ for 3 hours, 570 ℃ for 7 hours and 550 ℃ for 16 hours;
8. processing the permanent magnet ring 400 into a permanent magnet ring 400 with the size phi 18mm phi 12mm phi 6mm by using a surface grinder and an internal and external circular grinder;
9. the radiation pulse equipment is used for carrying out radiation magnetization on the alnico permanent magnet ring 400, and a three-dimensional meter magnetic instrument is used for testing the radiation magnetization direction meter magnetic parameters of the alnico permanent magnet ring 400. The radiation magnetic field heat treatment device is convenient to operate, the radiation magnetic field heat treatment method is simple, the radial heat treatment of the permanent magnet ring 400 can be realized, the maximum value of the radiation direction meter magnetism of the permanent magnet ring 400 after magnetizing is 220mT, the minimum value is 202mT, the difference value is 18mT, compared with the sixth embodiment and the seventh embodiment, the surface magnetism is increased from 134mT to 175mT to 202mT to 220mT, the surface magnetism difference value is reduced from 41mT to 18mT, and the surface magnetism can be improved and the surface magnetism fluctuation is reduced by optimizing the radiation magnetic field heat treatment process.
Example nine:
the embodiment is a specific implementation manner of a radiation magnetic field heat treatment method, the selected permanent magnet ring 400 is an alnico 5-type material, the cast ingot is an isotropic cast ingot, the cast ingot is processed into the permanent magnet ring 400 with the phi of 20mm x 10mm x 8mm, the permanent magnet ring 400 is insulated for 10min at the temperature of 1260 ℃, then air cooling is performed at the speed of 8 ℃/s, the first base 200 and the second base 300 are both made of iron-cobalt-vanadium materials, the shell 100 is made of mullite, and the heat treatment method of the alnico permanent magnet ring 400 for radiation magnetic field comprises the following steps:
1. heating the working chamber 120 to 500 ℃;
2. cooling the alnico permanent magnet ring 400 to 830 ℃;
3. an aluminum nickel cobalt permanent magnet ring 400 at 830 ℃ is sleeved on the salient pole head 210 of the first base 200, so that one end of the permanent magnet ring 400 is ensured to be in close contact with the salient pole head 210 of the first base 200, and the top end 211 just comes out from the other end of the permanent magnet ring 400;
4. rapidly moving the first base 200 toward the second base 300 to ensure that the accommodating hole 311 just wraps the alnico permanent magnet ring 400;
5. the magnetic circuit is communicated, the magnetic field intensity is regulated to 4000Oe, and the magnetic circuit is kept for 10min;
6. the magnetic circuit is disconnected, the first base 200 is moved reversely, and the alnico permanent magnet ring 400 is ensured to be completely exposed out of the second base 300;
7. the alnico permanent magnet ring 400 is taken off from the salient pole head 210, placed in heat treatment, kept for a period of time, cooled to room temperature along with a furnace, and the heat preservation process parameters are 600 ℃ 5h,570 ℃ 9h and 540 ℃ 16h;
8. processing the permanent magnet ring 400 into a permanent magnet ring 400 with the size phi 18mm phi 12mm phi 6mm by using a surface grinder and an internal and external circular grinder;
9. the radiation pulse equipment is used for carrying out radiation magnetization on the alnico permanent magnet ring 400, the three-dimensional meter magnetic instrument is used for testing the radiation magnetization direction meter magnetic parameters of the alnico permanent magnet ring 400, the radiation magnetic field heat treatment device is convenient to operate, the radiation magnetic field heat treatment method is simple, the radial heat treatment of the permanent magnet ring 400 can be realized, the maximum value of the radiation direction meter magnetic of the permanent magnet ring 400 after magnetization is 201mT, the minimum value is 173mT, the difference value is 28mT, compared with the sixth embodiment and the seventh embodiment, the meter magnetic field is increased from 134-175mT to 173-201mT, the meter magnetic difference value is reduced from 41mT to 28mT, compared with the eighth embodiment, the meter magnetic field is reduced from 202-220mT to 173-201mT, and the meter magnetic difference value is increased from 18mT to 28mT, and the radiation magnetic field heat treatment process of the eighth embodiment is shown to be optimal.
Comparative example one:
as shown in fig. 6, the permanent magnet ring selected in the comparative example is an alnico 5-type material, the ingot is an isotropic ingot, 4 pieces of 90 ° magnetic tiles are cut on the ingot, the sizes of the magnetic tiles are R10mm x R5mm x 8mm, the magnetic tiles are kept at 1260 ℃ for 10min, then air-cooled at a rate of 8 ℃/s, and the heat treatment method of the alnico permanent magnet ring radiation magnetic field comprises the following steps:
1. heating the working chamber to 550 ℃;
2. cooling the magnetic shoe to 820 ℃;
3. carrying out heat treatment on the magnetic shoe under the action of a magnetic field, and preserving heat for 12min to ensure that the radial direction of the magnetic shoe is parallel to the horizontal field direction, wherein the horizontal magnetic field strength is 3500Oe;
4. disconnecting the magnetic circuit and taking out the magnetic shoe;
5. cooling the furnace to room temperature after being placed in heat treatment for a period of time, wherein the heat preservation process parameters are 610 ℃ for 3 hours, 570 ℃ for 7 hours and 550 ℃ for 16 hours;
6. demagnetizing the magnetic shoe by using a demagnetizing machine, and removing surface oxide skin of the magnetic shoe by using a surface grinding machine and an internal and external circular grinding machine;
7. bonding 4 magnetic tiles into a spliced permanent magnet ring by using curing adhesive, and processing the permanent magnet ring into a permanent magnet ring with the size phi 18mm phi 12mm phi 6mm by using a surface grinding machine and an internal and external circular grinding machine;
8. the method comprises the steps of adjusting magnetizing voltage of radiation pulse equipment to 1000V, conducting radiation magnetizing on an AlNi-Co permanent magnet ring by the radiation pulse equipment, testing radiation magnetizing direction meter magnetic parameters of the AlNi-Co permanent magnet ring by using a three-dimensional meter magnetic instrument, wherein a radiation field direction meter magnetic value is 145-188mT, and a meter magnetic difference value is 43 mT.
Comparative example two:
as shown in fig. 7, the second permanent magnet ring of the comparative example is an alnico 5-type material, the ingot is an isotropic ingot, 16 pieces of 22.5 ° magnetic tiles are cut on the ingot, the sizes of the magnetic tiles are R10mm x R5mm x 8mm, the magnetic tiles are kept at 1260 ℃ for 10min, then the temperature is reduced by air cooling at a rate of 8 ℃/s, and the heat treatment method of the alnico permanent magnet ring radiation magnetic field comprises the following steps:
1. heating the working chamber to 550 ℃;
2. cooling the magnetic shoe to 820 ℃;
3. carrying out heat treatment on the magnetic shoe under the action of a magnetic field, and preserving heat for 12min to ensure that the radial direction of the magnetic shoe is parallel to the horizontal field direction, wherein the horizontal magnetic field strength is 3500Oe;
4. disconnecting the magnetic circuit and taking out the magnetic shoe;
5. the magnetic shoe is cooled to room temperature along with a furnace after being subjected to heat treatment for a period of time, wherein the heat preservation process parameters are 610 ℃ for 3 hours, 570 ℃ for 7 hours and 550 ℃ for 16 hours;
6. demagnetizing the magnetic shoe by using a demagnetizing machine, and removing surface oxide skin of the magnetic shoe by using a surface grinding machine and an internal and external circular grinding machine;
7. bonding 16 magnetic tiles into a spliced permanent magnet ring by using curing adhesive, and processing the permanent magnet ring into a permanent magnet ring with the size phi 18mm phi 12mm phi 6mm by using a surface grinding machine and an internal and external circular grinding machine;
8. and (3) adjusting the magnetizing voltage of the radiation pulse equipment to 1000V, carrying out radiation magnetizing on the aluminum nickel cobalt permanent magnet ring by adopting the radiation pulse equipment, and testing the radiation magnetizing direction meter magnetic parameters of the aluminum nickel cobalt permanent magnet ring by utilizing a three-dimensional meter magnetic instrument, wherein the radiation field direction meter magnetic value is 164-192mT, and the meter magnetic difference value is 28mT. Compared with the sixth comparative example, the surface magnetic field is increased from 145 mT to 188mT to 164 mT to 192mT, and the surface magnetic difference value is reduced from 43mT to 28mT, which shows that the increase of the number of the magnetic tiles can improve the surface magnetic field of the permanent magnet ring and reduce the fluctuation of the surface magnetic field. Compared with the eighth embodiment, the surface magnetic property is lower, the surface magnetic property volatility is poorer, and the bonding process is more complex and is not easy to operate.
It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.
Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A radiant magnetic field heat treatment device for a permanent magnet ring, comprising:
a heating unit comprising a housing (100) and a heating element (110), a working chamber (120) being provided within the housing (100), the heating element (110) being mounted within the working chamber (120) and being adapted to create a heat treatment environment within the working chamber (120);
salient pole heads (210) penetrating through the inner holes of the permanent magnet rings (400);
the concave pole head (310), wherein the concave pole head (310) is provided with a containing hole (311) for containing the permanent magnet ring (400);
wherein, the salient pole head (210) and the concave pole head (310) are both positioned in the working cavity (120) and can be close to or far away from each other, and the salient pole head (210) and the concave pole head (310) in the working state have magnetism and have opposite magnetic poles; when the salient pole head (210) approaches the concave pole head (310), the salient pole head (210) is inserted into the accommodating hole (311), an annular accommodating part (500) for accommodating the permanent magnet ring (400) is formed between the peripheral surface of the salient pole head (210) and the outline of the accommodating hole (311), and the salient pole head (210) and the concave pole head (310) form a radial magnetic field in the annular accommodating part (500) through opposite magnetic poles.
2. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 1, wherein: the permanent magnet ring (400) is arranged as an alnico permanent magnet ring (400) or an iron-chromium-cobalt permanent magnet ring (400), and the permanent magnet ring (400) utilizes the radial magnetic field to induce precipitation of radial precipitated phases in a heat treatment environment in the working cavity (120).
3. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 1, wherein: the salient pole heads (210) are aligned with the accommodation holes (311), and the center line of the salient pole heads (210) is disposed coaxially with the center line of the accommodation holes (311).
4. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 3, wherein: the salient pole head (210) is close to one end of the accommodating hole (311) and is arranged to be of a cone-like structure with the outer peripheral surface formed by arc curve rotation, the diameter of the salient pole head (210) gradually increases along the axis direction from one end of the accommodating hole (311) to one end of the salient pole head (310) away from the accommodating hole (311), and an arc chamfer is arranged at one end of the salient pole head (210) close to the concave pole head.
5. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 1, wherein: the magnetic poles of the salient pole head (210) and the concave pole head (310) in the working state are respectively N pole and S pole or S pole and N pole.
6. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 5, wherein: the magnetic field strength-adjustable salient pole machine further comprises a first base (200) and a second base (300), wherein the salient pole head (210) is detachably connected with the first base (200), the concave pole head (310) is detachably connected with the second base (300), and the first base (200) and the second base (300) are all electromagnetic pieces capable of adjusting the magnetic field strength.
7. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 5, wherein: the salient pole head (210) and the concave pole head (310) are made of materials with low heat conductivity and high magnetic conductivity.
8. A radiant magnetic field heat treatment apparatus for a permanent magnet ring as defined in claim 1 or 4, wherein: the top end part (211) of the salient pole head (210) in the working state extends out of the inner hole of the permanent magnet ring (400).
9. A radiation field heat treatment method, characterized by comprising the radiation field heat treatment device of the permanent magnet ring according to any one of claims 1 to 8, further comprising the steps of:
s1: heating the working chamber (120), heating the working chamber (120) to a set temperature with the heating element (110) to form a heat treatment environment within the working chamber (120);
s2: sleeving the permanent magnet ring (400) on the salient pole head (210) to enable the inner hole wall surface of the permanent magnet ring (400) to be in close contact with the outer peripheral surface of the salient pole head (210), wherein the top end part (211) of the salient pole head (210) extends out of the inner hole of the permanent magnet ring (400);
s3: the salient pole head (210) is close to the concave pole head (310) so that the salient pole head (210) is inserted into the accommodating hole (311) of the concave pole head (310), the outline of the permanent magnet ring (400) on the salient pole head (210) is attached to the wall surface of the accommodating hole (311), and the permanent magnet ring (400) is positioned in the annular accommodating part (500);
s4: the salient pole head (210) is communicated with the concave pole head (310) to form a radial magnetic field in the annular accommodating part (500) through magnetic poles opposite to the salient pole head (210) and the concave pole head (310), and meanwhile, the permanent magnet ring (400) is kept for a certain time in the radial magnetic field and a heat treatment environment, so that the radial precipitated phase of the permanent magnet ring (400) is induced to be precipitated;
s5: disconnecting the magnetic circuit, and separating the salient pole head (210) from the concave pole head (310) so as to separate the permanent magnet ring (400) from the accommodating hole (311);
s6: tempering the permanent magnet ring (400), taking the permanent magnet ring (400) off the salient pole head (210), placing the permanent magnet ring (400) in a heat treatment furnace, preserving heat for a preset time, and then cooling to room temperature along with the furnace and taking out.
10. A radiation field heat treatment method as defined in claim 9, wherein: further comprising step S7: and (3) magnetizing the permanent magnet ring (400), performing radiation magnetizing on the permanent magnet ring (400) by adopting radiation pulse equipment, and testing the surface magnetic parameters of the permanent magnet ring (400) by using a three-dimensional surface magnetic meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310195836.0A CN116313476A (en) | 2023-02-23 | 2023-02-23 | Radiation magnetic field heat treatment device and radiation magnetic field heat treatment method for permanent magnet ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310195836.0A CN116313476A (en) | 2023-02-23 | 2023-02-23 | Radiation magnetic field heat treatment device and radiation magnetic field heat treatment method for permanent magnet ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116313476A true CN116313476A (en) | 2023-06-23 |
Family
ID=86797182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310195836.0A Pending CN116313476A (en) | 2023-02-23 | 2023-02-23 | Radiation magnetic field heat treatment device and radiation magnetic field heat treatment method for permanent magnet ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116313476A (en) |
-
2023
- 2023-02-23 CN CN202310195836.0A patent/CN116313476A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106252023B (en) | A kind of multi-pole magnet-ring orientation and the fixture and method that magnetize | |
| CN104616855B (en) | The magnetization method and device of Sintered NdFeB magnet or magnet assembly | |
| CN104392836B (en) | Manufacturing method of anisotropic high-performance dry-pressed sintered ferrite multi-pole magnetic ring | |
| CN101882494A (en) | Samarium-cobalt sintered magnet material and preparation method thereof | |
| CA3121601A1 (en) | Lightweight asymmetric magnet arrays with mixed-phase magnet rings | |
| CN104895921A (en) | Two freedom degree lorentz force outer rotor spherical surface magnetic bearing | |
| CN219534275U (en) | Radiation magnetic field heat treatment device of permanent magnet ring | |
| CN116313476A (en) | Radiation magnetic field heat treatment device and radiation magnetic field heat treatment method for permanent magnet ring | |
| CN101964236A (en) | Manufacturing method of multipolar magnet ring | |
| CN104766717B (en) | A method of improving sintered Nd-Fe-B permanent magnet magnetic property | |
| CA3121698A1 (en) | Lightweight asymmetric magnet arrays with theta magnet rings | |
| JP2014099600A (en) | Rare earth magnet magnetization method, and rare earth magnet | |
| CN104240884A (en) | Multi-pole integral permanent magnetic ring as well as preparation method and production system thereof | |
| CN102134665B (en) | Platinum-cobalt permanent magnetic multi-pole ring and preparation method thereof | |
| CN114069994A (en) | Magnetic field heat treatment device of multi-pole motor rotor | |
| JP4389194B2 (en) | Magnetic field heat treatment furnace | |
| CN204716759U (en) | A kind of two-freedom Lorentz force external rotor sphere magnetic bearing | |
| CN205609346U (en) | Magnetism base manufacture equipment | |
| CN211530872U (en) | Disc type motor with double-layer Halbach array | |
| EP3503140A1 (en) | Sintered magnetic body, magnet, electrical machine, wind turbine and method for manufacturing a sintered magnetic body | |
| JP2004071853A (en) | Heat treatment furnace in magnetic field, and heat treatment method using it | |
| WO2015159882A1 (en) | SmCo-BASED RARE EARTH SINTERED MAGNET | |
| US9252635B2 (en) | Rotor for an electric machine and electric machine | |
| CN207835191U (en) | A kind of rotor using Halbach magnet ring | |
| CN219683947U (en) | Rare earth permanent magnet powder preparation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |