CN114203434A - Method and equipment for preparing powder magnetic core with low loss - Google Patents
Method and equipment for preparing powder magnetic core with low loss Download PDFInfo
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- CN114203434A CN114203434A CN202111577871.6A CN202111577871A CN114203434A CN 114203434 A CN114203434 A CN 114203434A CN 202111577871 A CN202111577871 A CN 202111577871A CN 114203434 A CN114203434 A CN 114203434A
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- 239000000843 powder Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000006247 magnetic powder Substances 0.000 claims abstract description 77
- 239000002994 raw material Substances 0.000 claims abstract description 45
- 238000003860 storage Methods 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 238000003754 machining Methods 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims abstract description 7
- 239000000696 magnetic material Substances 0.000 claims description 29
- 239000000428 dust Substances 0.000 claims description 25
- 230000005415 magnetization Effects 0.000 claims description 24
- 230000035699 permeability Effects 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000004907 flux Effects 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 206010024796 Logorrhoea Diseases 0.000 claims description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 16
- 238000003756 stirring Methods 0.000 abstract description 10
- 238000005470 impregnation Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 48
- 238000002156 mixing Methods 0.000 description 31
- 238000003825 pressing Methods 0.000 description 9
- 239000011247 coating layer Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000006249 magnetic particle Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 2
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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Classifications
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- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
Abstract
The invention discloses a method and equipment for preparing a powder magnetic core with low loss, which comprises the following working steps: (1) screening the raw materials, and preparing the machined parts; (2) crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled; (3) collecting the crushed soft magnetic powder and storing; (4) applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder; (5) rapidly solidifying the soft magnetic powder; (6) and obtaining the powder magnetic core. According to the invention, the stirring cylinder, the driving motor, the rotating rod, the driving rod and the stirring blades are arranged, so that articles in the device are quickly stirred, the articles in the device are finely stirred, through the arrangement of the storage cylinder and the magnetic field, workers can store and discharge materials in the storage cylinder, and the magnetic field is placed in the storage cylinder, so that the powder magnetic cores are sequenced, and the powder magnetic cores in the storage cylinder are solidified through the impregnation of curable resin.
Description
Technical Field
The invention relates to the technical field of powder magnetic cores, in particular to a method and equipment for preparing a powder magnetic core with low loss.
Background
The magnetic core means a sintered magnetic metal oxide composed of various iron oxide mixtures, for example, manganese-zinc ferrite and nickel-zinc ferrite are typical magnetic core materials, and the manganese-zinc ferrite has characteristics of high magnetic permeability and high magnetic flux density and has a characteristic of low loss.
The method and the equipment for preparing the powder magnetic core with small loss in the prior art have the defects that:
1. patent document CN105405568A discloses a powder for a magnetic core, a method of producing a powder magnetic core, and a method of producing a powder for a magnetic core, including "a powder magnetic core comprising soft magnetic particles, a first coating layer, a second coating layer, and a third coating layer. The first coating layer is made of alumina, and at least a part of the surface of the soft magnetic particle is coated with the first coating layer. The second cladding layer is made of aluminum nitride, and at least a part of the surface of the first cladding layer is coated with the second cladding layer. The third coating layer is made of low-melting-point glass, and at least a part of the surface of the second coating layer is coated with the third coating layer. The low-melting glass has a softening point lower than an annealing temperature of the soft magnetic particles. "when the above-mentioned device was used, the staff needed to be more meticulous with the inside stirring of device, but the result of use of most devices is relatively poor, and is inconvenient to use.
2. In the prior art, when the method and the equipment for preparing the powder magnetic core with small loss are used, workers need to quickly store and sort the interior of the device, but most devices have poor using effect, so that the devices are inconvenient to use.
3. In the prior art, when the method and the equipment for preparing the dust core with small loss are used, workers need to perform rapid curing inside the device, but the using effect of most of devices is poor, and the control is inconvenient, so that the using effect of the device is poor.
Disclosure of Invention
The present invention is directed to a method and apparatus for manufacturing a powder magnetic core with low loss, which solves the problems of the background art mentioned above.
In order to achieve the above object, the present invention provides a method for manufacturing a powder magnetic core with low loss, comprising the following steps:
(1) screening the raw materials, and preparing the machined parts;
(2) crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled;
(3) collecting the crushed soft magnetic powder and storing;
(4) applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder;
(5) rapidly solidifying the soft magnetic powder;
(6) and obtaining the powder magnetic core.
Preferably, in the step (1), the worker completes the raw material, controls the diameter of the powder to be 50 μm or more and 100 μm or less, and provides the workpiece on one side, so that the worker cleans the inside of the workpiece and inspects and repairs the workpiece to make the use process thereof smooth.
Preferably, in the step (2), the worker adds the raw material into the interior of the workpiece and powers on the workpiece, so that the device inside the workpiece crushes the raw material.
Preferably, in the step (3), the soft magnetic powder crushed inside the workpiece needs to be collected by the worker, so that the soft magnetic powder is added into the container at the bottom of the workpiece.
Preferably, in the step (4), the soft magnetic powder inside the container is sequenced, a magnetic field is applied by an operator inside the container, the magnetic field sequences the soft magnetic powder orderly, so that the soft magnetic powder is convenient to align, and can be magnetized to 80% -90% of the saturation magnetization intensity under a low magnetic field, namely, the initial permeability is high, the saturation magnetization intensity is high, the magnetic hysteresis loop of the soft magnetic material is used in an alternating magnetic field, the magnetic hysteresis loop of the soft magnetic material is as small as possible, because the magnetic loss is in direct proportion to the area of the magnetic hysteresis loop, the requirement of the soft magnetic material for high initial permeability, high saturation magnetization intensity and low coercive force is required at low frequency, but the requirement of the saturation magnetization intensity is limited when the soft magnetic material is used at high frequency, and the requirement of the soft magnetic material for high resistance is most important because the eddy current loss is in direct proportion to the square of the frequency when the soft magnetic material is used at very high frequency.
Preferably, in the step (5), the soft magnetic powder arranged in alignment is impregnated with a curable resin to be cured, and the curable resin is cured while exhausting air, so that the soft magnetic powder can be used by a worker conveniently.
Preferably, in the step (6), the worker collects the immobilized dust core, and the preparation is convenient, the fixed dust core is mainly prepared by adding an insulating agent and a binder into pure iron powder and performing extrusion molding, the general initial permeability is below 75, the product has high saturation magnetic flux density, the general product is not suitable for a circuit with a frequency of more than 200KHz due to small surface resistance, and a high-frequency material is continuously generated along with the improvement of the technology, and the iron powder core is generally used for a power type magnetic ring inductor and is more commonly used for various switching power supplies.
Preferably, the machined part includes the churn, the mid-mounting at churn top has the motor box, there is driving motor one side of motor box inner wall through solid fixed ring threaded connection, the dwang is installed to driving motor's output, the actuating lever is installed to the bottom of dwang, the garrulous blade is installed to one side on actuating lever surface, the filter screen is installed to the bottom of actuating lever.
Preferably, the discharging pipe is installed to one side of churn inner wall, one side of discharging pipe inner wall is provided with the valve, the connection board is installed to one side of churn bottom, the middle part overlap joint at connection board top has the storage section of thick bamboo.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the arrangement of the mixing drum, the driving motor, the rotating rod, the driving rod and the stirring blades, the articles in the device are quickly stirred, so that the articles in the device are finely stirred and the operation of workers is facilitated.
2. The powder magnetic core in the storage cylinder is cured by impregnating the curable resin, and the curing effect of the powder magnetic core impregnated by the curable resin is good, so that the powder magnetic core is rapidly cured in use and is convenient to operate.
3. The invention collects the fixed dust magnetic core, and is convenient to prepare, the invention is mainly prepared by adding insulating agent and binder into pure iron powder and extruding, the general initial magnetic permeability is below 75, and the magnetic core has high saturation magnetic flux density.
Drawings
FIG. 1 is a flow chart of the operation of the present invention;
FIG. 2 is a perspective view of the construction of the mixing drum of the present invention;
FIG. 3 is a schematic view of the driving motor structure of the present invention;
in the figure: 1. a mixing drum; 2. a motor box; 3. a drive motor; 4. rotating the rod; 5. a drive rod; 6. crushing the blades; 7. a filter screen; 8. a storage cylinder; 9. a valve; 10. a connector tile; 11. a storage cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, 2 and 3, in one embodiment of the present invention, a method for manufacturing a powder magnetic core with low loss comprises the following steps:
(1) screening the raw materials, and preparing the machined parts;
(2) crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled;
(3) collecting the crushed soft magnetic powder and storing;
(4) applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder;
(5) rapidly solidifying the soft magnetic powder;
(6) obtaining a powder magnetic core;
in the step (1), a worker prepares the raw material completely, and a workpiece is arranged on one side, so that the worker cleans the interior of the workpiece, the diameter of the powder is controlled to be more than 50 microns and less than 100 microns, and the workpiece is overhauled, so that the using process of the workpiece is smooth; in the step (2), a worker adds raw materials into the interior of the workpiece and switches on the power supply of the workpiece, so that the raw materials are crushed by a device in the interior of the workpiece; in the step (3), the soft magnetic powder crushed inside the workpiece needs to be collected by a worker, so that the soft magnetic powder is added into the container at the bottom of the workpiece; in the step (4), soft magnetic powder in the container is sequenced, a magnetic field is applied to the container by a worker, the soft magnetic powder is sequenced by the magnetic field to be convenient to swing, the soft magnetic powder can be magnetized to 80% -90% of the saturation magnetization intensity under a low magnetic field, namely, the initial permeability is high, the saturation magnetization intensity is high, the soft magnetic powder is used in an alternating magnetic field, a magnetic hysteresis loop of the soft magnetic material is as small as possible, the magnetic loss is in direct proportion to the area of the magnetic hysteresis loop, the soft magnetic material is required to have high initial permeability, high saturation magnetization intensity and low coercive force at low frequency, but the requirement of high saturation magnetization intensity is limited when the soft magnetic material is used at higher frequency, and the requirement of high resistance of the soft magnetic material is most important when the soft magnetic material is used at very high frequency because the eddy current loss is in direct proportion to the square of the frequency; in the step (5), the soft magnetic powder arranged in order is impregnated by curable resin to be cured, and the curable resin is cured while exhausting gas, so that the soft magnetic powder is convenient for workers to use; in the step (6), workers collect the immobilized dust core and conveniently prepare the dust core, the dust core is mainly prepared by adding insulating agent and binder into pure iron powder and performing extrusion molding, the general initial magnetic permeability is below 75, the product has very high saturation magnetic flux density, and the general product is not suitable for a circuit above 200KHz due to small surface resistance, and is only suitable for the improvement of the technology along with the continuous occurrence of high-frequency materials, and the iron powder core is generally used for a power type magnetic ring inductor and is more commonly used on various switching power supplies; the processing part comprises a mixing drum 1, a motor box 2 is installed in the middle of the top of the mixing drum 1, one side of the inner wall of the motor box 2 is connected with a driving motor 3 through a fixed ring thread, a rotating rod 4 is installed at the output end of the driving motor 3, a driving rod 5 is installed at the bottom end of the rotating rod 4, a crushing blade 6 is installed at one side of the surface of the driving rod 5, and a filter screen 7 is installed at the bottom end of the driving rod 5; a discharging pipe 8 is installed on one side of the inner wall of the mixing drum 1, a valve 9 is arranged on one side of the inner wall of the discharging pipe 8, a connecting plate 10 is installed on one side of the bottom of the mixing drum 1, and a material storage drum 11 is lapped in the middle of the top of the connecting plate 10.
In the invention, the working steps of the device are as follows:
the first embodiment is as follows:
controlling the diameter of the powder below 50 μm;
referring to fig. 1, 2 and 3, an embodiment of the present invention includes the following steps:
(1) screening the raw materials, and preparing the machined parts;
(2) crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled;
(3) collecting the crushed soft magnetic powder and storing;
(4) applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder;
(5) rapidly solidifying the soft magnetic powder;
(6) obtaining a powder magnetic core;
in the step (1), a worker prepares the raw materials perfectly, and a workpiece is arranged on one side, so that the worker can clean the interior of the workpiece and overhaul the workpiece, and the use process of the workpiece is smooth; in the step (2), a worker adds raw materials into the interior of the workpiece and switches on the power supply of the workpiece, so that the raw materials are crushed by a device in the interior of the workpiece; in the step (3), the soft magnetic powder crushed inside the workpiece needs to be collected by a worker, so that the soft magnetic powder is added into the container at the bottom of the workpiece; in the step (4), soft magnetic powder in the container is sequenced, a magnetic field is applied to the container by a worker, the soft magnetic powder is sequenced by the magnetic field to be convenient to swing, the soft magnetic powder can be magnetized to 80% -90% of the saturation magnetization intensity under a low magnetic field, namely, the initial permeability is high, the saturation magnetization intensity is high, the soft magnetic powder is used in an alternating magnetic field, a magnetic hysteresis loop of the soft magnetic material is as small as possible, the magnetic loss is in direct proportion to the area of the magnetic hysteresis loop, the soft magnetic material is required to have high initial permeability, high saturation magnetization intensity and low coercive force at low frequency, but the requirement of high saturation magnetization intensity is limited when the soft magnetic material is used at higher frequency, and the requirement of high resistance of the soft magnetic material is most important when the soft magnetic material is used at very high frequency because the eddy current loss is in direct proportion to the square of the frequency; in the step (5), the diameter of the soft magnetic powder is small, so that the soft magnetic powder is difficult to solidify into the curable resin and is inconvenient for workers to use; in the step (6), workers collect the immobilized dust core and conveniently prepare the dust core, the dust core is mainly prepared by adding insulating agent and binder into pure iron powder and performing extrusion molding, the general initial magnetic permeability is below 75, the product has very high saturation magnetic flux density, and the general product is not suitable for a circuit above 200KHz due to small surface resistance, and is only suitable for the improvement of the technology along with the continuous occurrence of high-frequency materials, and the iron powder core is generally used for a power type magnetic ring inductor and is more commonly used on various switching power supplies; the processing part comprises a mixing drum 1, a motor box 2 is installed in the middle of the top of the mixing drum 1, one side of the inner wall of the motor box 2 is connected with a driving motor 3 through a fixed ring thread, a rotating rod 4 is installed at the output end of the driving motor 3, a driving rod 5 is installed at the bottom end of the rotating rod 4, a crushing blade 6 is installed at one side of the surface of the driving rod 5, and a filter screen 7 is installed at the bottom end of the driving rod 5;
through the arrangement of the mixing drum 1, the motor box 2, the driving motor 3, the rotating rod 4, the driving rod 5, the crushing blade 6 and the filter screen 7, when in use, a worker needs to crush materials inside the device, because a feeding pipe is arranged at the top of the mixing drum 1, the worker adds the materials into the mixing drum 1 through the feeding pipe, the motor box 2 is arranged at the top of the mixing drum 1, the driving motor 3 is arranged inside the motor box 2 through a fixing ring, the worker connects the driving motor 3 with a power supply, the output end of the driving motor 3 drives the rotating rod 4 to rotate, the driving rod 5 is arranged at the bottom end of the rotating rod 4, the rotating rod 4 drives the driving rod 5 to rotate, the crushing blade 6 is arranged on the surface of the driving rod 5, the driving rod 5 drives the crushing blade 6 to rotate, and then the crushing blade 6 crushes the raw materials inside, and be provided with filter screen 7 in the bottom for the raw materials that stir spill, thereby make things convenient for the staff to use, and be convenient for smash the material.
A discharge pipe 8 is arranged on one side of the inner wall of the mixing drum 1, a valve 9 is arranged on one side of the inner wall of the discharge pipe 8, a connecting plate 10 is arranged on one side of the bottom of the mixing drum 1, and a storage drum 11 is lapped on the middle of the top of the connecting plate 10;
through discharging pipe 8, valve 9, connection plate 10 and storage cylinder 11's setting, during the use, the staff need collect the inside of storage cylinder 11 through the discharging pipe with the inside powder pressing magnetic core that stirs garrulous of device, because of be provided with valve 9 in the inside of discharging pipe 8, be convenient for control its ejection of compact, and be provided with connection plate 10 in the bottom, connection plate 10's top overlap joint has storage cylinder 11, make the inside of storage cylinder 11 be equipped with the powder pressing magnetic core, thereby make the powder pressing magnetic core be convenient for collect the use, and the staff of being convenient for operates.
Example two:
controlling the diameter of the powder to be more than 50 μm and less than 100 μm;
referring to fig. 1, 2 and 3, an embodiment of the present invention includes the following steps:
(1) screening the raw materials, and preparing the machined parts;
(2) crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled;
(3) collecting the crushed soft magnetic powder and storing;
(4) applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder;
(5) rapidly solidifying the soft magnetic powder;
(6) obtaining a powder magnetic core;
in the step (1), a worker prepares the raw materials perfectly, and a workpiece is arranged on one side, so that the worker can clean the interior of the workpiece and overhaul the workpiece, and the use process of the workpiece is smooth; in the step (2), a worker adds raw materials into the interior of the workpiece and switches on the power supply of the workpiece, so that the raw materials are crushed by a device in the interior of the workpiece; in the step (3), the soft magnetic powder crushed inside the workpiece needs to be collected by a worker, so that the soft magnetic powder is added into the container at the bottom of the workpiece; in the step (4), soft magnetic powder in the container is sequenced, a magnetic field is applied to the container by a worker, the soft magnetic powder is sequenced by the magnetic field to be convenient to swing, the soft magnetic powder can be magnetized to 80% -90% of the saturation magnetization intensity under a low magnetic field, namely, the initial permeability is high, the saturation magnetization intensity is high, the soft magnetic powder is used in an alternating magnetic field, a magnetic hysteresis loop of the soft magnetic material is as small as possible, the magnetic loss is in direct proportion to the area of the magnetic hysteresis loop, the soft magnetic material is required to have high initial permeability, high saturation magnetization intensity and low coercive force at low frequency, but the requirement of high saturation magnetization intensity is limited when the soft magnetic material is used at higher frequency, and the requirement of high resistance of the soft magnetic material is most important when the soft magnetic material is used at very high frequency because the eddy current loss is in direct proportion to the square of the frequency; in the step (5), the soft magnetic powder arranged in order is impregnated by curable resin to be cured, and the curable resin is cured while exhausting gas, so that the soft magnetic powder is convenient for workers to use; in the step (6), workers collect the immobilized dust core and conveniently prepare the dust core, the dust core is mainly prepared by adding insulating agent and binder into pure iron powder and performing extrusion molding, the general initial magnetic permeability is below 75, the product has very high saturation magnetic flux density, and the general product is not suitable for a circuit above 200KHz due to small surface resistance, and is only suitable for the improvement of the technology along with the continuous occurrence of high-frequency materials, and the iron powder core is generally used for a power type magnetic ring inductor and is more commonly used on various switching power supplies; the processing part comprises a mixing drum 1, a motor box 2 is installed in the middle of the top of the mixing drum 1, one side of the inner wall of the motor box 2 is connected with a driving motor 3 through a fixed ring thread, a rotating rod 4 is installed at the output end of the driving motor 3, a driving rod 5 is installed at the bottom end of the rotating rod 4, a crushing blade 6 is installed at one side of the surface of the driving rod 5, and a filter screen 7 is installed at the bottom end of the driving rod 5; through the arrangement of the mixing drum 1, the motor box 2, the driving motor 3, the rotating rod 4, the driving rod 5, the crushing blade 6 and the filter screen 7, when in use, a worker needs to crush materials inside the device, because a feeding pipe is arranged at the top of the mixing drum 1, the worker adds the materials into the mixing drum 1 through the feeding pipe, the motor box 2 is arranged at the top of the mixing drum 1, the driving motor 3 is arranged inside the motor box 2 through a fixing ring, the worker connects the driving motor 3 with a power supply, the output end of the driving motor 3 drives the rotating rod 4 to rotate, the driving rod 5 is arranged at the bottom end of the rotating rod 4, the rotating rod 4 drives the driving rod 5 to rotate, the crushing blade 6 is arranged on the surface of the driving rod 5, the driving rod 5 drives the crushing blade 6 to rotate, and then the crushing blade 6 crushes the raw materials inside, and be provided with filter screen 7 in the bottom for the raw materials that stir spill, thereby make things convenient for the staff to use, and be convenient for smash the material. A discharge pipe 8 is arranged on one side of the inner wall of the mixing drum 1, a valve 9 is arranged on one side of the inner wall of the discharge pipe 8, a connecting plate 10 is arranged on one side of the bottom of the mixing drum 1, and a storage drum 11 is lapped on the middle of the top of the connecting plate 10;
through discharging pipe 8, valve 9, connection plate 10 and storage cylinder 11's setting, during the use, the staff need collect the inside of storage cylinder 11 through the discharging pipe with the inside powder pressing magnetic core that stirs garrulous of device, because of be provided with valve 9 in the inside of discharging pipe 8, be convenient for control its ejection of compact, and be provided with connection plate 10 in the bottom, connection plate 10's top overlap joint has storage cylinder 11, make the inside of storage cylinder 11 be equipped with the powder pressing magnetic core, thereby make the powder pressing magnetic core be convenient for collect the use, and the staff of being convenient for operates.
Example three:
controlling the diameter of the powder to be more than 100 mu m;
referring to fig. 1, 2 and 3, an embodiment of the present invention includes the following steps:
(1) screening the raw materials, and preparing the machined parts;
(2) crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled;
(3) collecting the crushed soft magnetic powder and storing;
(4) applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder;
(5) rapidly solidifying the soft magnetic powder;
(6) obtaining a powder magnetic core;
in the step (1), a worker prepares the raw materials perfectly, and a workpiece is arranged on one side, so that the worker can clean the interior of the workpiece and overhaul the workpiece, and the use process of the workpiece is smooth; in the step (2), a worker adds raw materials into the interior of the workpiece and switches on the power supply of the workpiece, so that the raw materials are crushed by a device in the interior of the workpiece; in the step (3), the soft magnetic powder crushed inside the workpiece needs to be collected by a worker, so that the soft magnetic powder is added into the container at the bottom of the workpiece; in the step (4), soft magnetic powder in the container is sequenced, a magnetic field is applied to the container by a worker, the soft magnetic powder is sequenced by the magnetic field to be convenient to swing, the soft magnetic powder can be magnetized to 80% -90% of the saturation magnetization intensity under a low magnetic field, namely, the initial permeability is high, the saturation magnetization intensity is high, the soft magnetic powder is used in an alternating magnetic field, a magnetic hysteresis loop of the soft magnetic material is as small as possible, the magnetic loss is in direct proportion to the area of the magnetic hysteresis loop, the soft magnetic material is required to have high initial permeability, high saturation magnetization intensity and low coercive force at low frequency, but the requirement of high saturation magnetization intensity is limited when the soft magnetic material is used at higher frequency, and the requirement of high resistance of the soft magnetic material is most important when the soft magnetic material is used at very high frequency because the eddy current loss is in direct proportion to the square of the frequency; in the step (5), the diameter of the soft magnetic powder is small, so that the soft magnetic powder is difficult to solidify into the curable resin and is inconvenient for workers to use; in the step (6), workers collect the immobilized dust core and conveniently prepare the dust core, the dust core is mainly prepared by adding insulating agent and binder into pure iron powder and performing extrusion molding, the general initial magnetic permeability is below 75, the product has very high saturation magnetic flux density, and the general product is not suitable for a circuit above 200KHz due to small surface resistance, and is only suitable for the improvement of the technology along with the continuous occurrence of high-frequency materials, and the iron powder core is generally used for a power type magnetic ring inductor and is more commonly used on various switching power supplies; the processing part comprises a mixing drum 1, a motor box 2 is installed in the middle of the top of the mixing drum 1, one side of the inner wall of the motor box 2 is connected with a driving motor 3 through a fixed ring thread, a rotating rod 4 is installed at the output end of the driving motor 3, a driving rod 5 is installed at the bottom end of the rotating rod 4, a crushing blade 6 is installed at one side of the surface of the driving rod 5, and a filter screen 7 is installed at the bottom end of the driving rod 5; through the arrangement of the mixing drum 1, the motor box 2, the driving motor 3, the rotating rod 4, the driving rod 5, the crushing blade 6 and the filter screen 7, when in use, a worker needs to crush materials inside the device, because a feeding pipe is arranged at the top of the mixing drum 1, the worker adds the materials into the mixing drum 1 through the feeding pipe, the motor box 2 is arranged at the top of the mixing drum 1, the driving motor 3 is arranged inside the motor box 2 through a fixing ring, the worker connects the driving motor 3 with a power supply, the output end of the driving motor 3 drives the rotating rod 4 to rotate, the driving rod 5 is arranged at the bottom end of the rotating rod 4, the rotating rod 4 drives the driving rod 5 to rotate, the crushing blade 6 is arranged on the surface of the driving rod 5, the driving rod 5 drives the crushing blade 6 to rotate, and then the crushing blade 6 crushes the raw materials inside, and be provided with filter screen 7 in the bottom for the raw materials that stir spill, thereby make things convenient for the staff to use, and be convenient for smash the material. A discharge pipe 8 is arranged on one side of the inner wall of the mixing drum 1, a valve 9 is arranged on one side of the inner wall of the discharge pipe 8, a connecting plate 10 is arranged on one side of the bottom of the mixing drum 1, and a storage drum 11 is lapped on the middle of the top of the connecting plate 10;
through discharging pipe 8, valve 9, connection plate 10 and storage cylinder 11's setting, during the use, the staff need collect the inside of storage cylinder 11 through the discharging pipe with the inside powder pressing magnetic core that stirs garrulous of device, because of be provided with valve 9 in the inside of discharging pipe 8, be convenient for control its ejection of compact, and be provided with connection plate 10 in the bottom, connection plate 10's top overlap joint has storage cylinder 11, make the inside of storage cylinder 11 be equipped with the powder pressing magnetic core, thereby make the powder pressing magnetic core be convenient for collect the use, and the staff of being convenient for operates.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A method of making a powder magnetic core with low loss, comprising: the method comprises the following working steps:
screening the raw materials, and preparing the machined parts;
crushing the raw materials in the machining part, wherein the size of the raw materials needs to be controlled;
collecting the crushed soft magnetic powder and storing;
applying a magnetic field in the soft magnetic powder to sort the soft magnetic powder;
rapidly solidifying the soft magnetic powder;
and obtaining the powder magnetic core.
2. The method for producing a low-loss dust core according to claim 1, wherein: in the step (1), the worker completes the preparation of the raw material, controls the diameter of the powder to be more than 50 microns and less than 100 microns, and is provided with a workpiece on one side, so that the worker can clean the inside of the workpiece and overhaul the workpiece, and the using process of the workpiece is smooth.
3. The method for producing a low-loss dust core according to claim 1, wherein: in the step (2), the staff adds the raw materials into the interior of the workpiece and switches on the power supply of the workpiece, so that the raw materials are crushed by the device in the interior of the workpiece.
4. The method for producing a low-loss dust core according to claim 1, wherein: in the step (3), the soft magnetic powder crushed inside the workpiece needs to be collected by the staff, so that the soft magnetic powder is added into the container at the bottom of the workpiece.
5. The method for producing a low-loss dust core according to claim 1, wherein: in the step (4), the soft magnetic powder in the container is sequenced, a magnetic field is applied to the container by a worker, the soft magnetic powder is sequenced in order by the magnetic field, the soft magnetic powder is convenient to swing, the soft magnetic powder can be magnetized to 80% -90% of the saturation magnetization intensity under a low magnetic field, namely, the initial permeability is high, the saturation magnetization intensity is high, the soft magnetic powder is used in an alternating magnetic field, a magnetic hysteresis loop of the soft magnetic material is as small as possible, the magnetic loss is in direct proportion to the area of the magnetic hysteresis loop, the soft magnetic material is required to have high initial permeability, high saturation magnetization intensity and low coercive force at low frequency, but the requirement of high saturation magnetization intensity is limited when the soft magnetic powder is used at high frequency, and the soft magnetic material is required to have high resistance because the eddy current loss is in direct proportion to the square of the frequency when the soft magnetic powder is used at very high frequency.
6. The method for producing a low-loss dust core according to claim 1, wherein: in the step (5), the soft magnetic powder arranged in alignment is impregnated with a curable resin to be cured, and the curable resin is cured while exhausting air for use by a worker.
7. The method for producing a low-loss dust core according to claim 1, wherein: in the step (6), the solidified dust core is collected and conveniently prepared by workers, the solidified dust core is mainly prepared by adding insulating agents and binding agents into pure iron powder and performing extrusion forming, the initial magnetic permeability is below 75, and the magnetic core has high saturation magnetic flux density.
8. The method for producing a low-loss dust core according to claim 2, wherein: the machined part includes churn (1), the mid-mounting at churn (1) top has motor box (2), there are driving motor (3) one side of motor box (2) inner wall through solid fixed ring threaded connection, dwang (4) are installed to the output of driving motor (3), actuating lever (5) are installed to the bottom of dwang (4), one side on actuating lever (5) surface is installed and is stirred garrulous blade (6), filter screen (7) are installed to the bottom of actuating lever (5).
9. The method of claim 8, wherein the method comprises the steps of: discharging pipe (8) are installed to one side of churn (1) inner wall, one side of discharging pipe (8) inner wall is provided with valve (9), link up plate (10) are installed to one side of churn (1) bottom, the middle part overlap joint at link up plate (10) top has storage section of thick bamboo (11).
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| CN108565109A (en) * | 2018-06-11 | 2018-09-21 | 彭晓领 | A kind of preparation method of soft-magnetic composite material |
| CN110233042A (en) * | 2019-06-05 | 2019-09-13 | 浙江鑫盛永磁科技有限公司 | A kind of ndfeb magnet manufacturing process |
| CN111681866A (en) * | 2019-03-11 | 2020-09-18 | 丰田自动车株式会社 | Method for manufacturing powder magnetic core |
| CN211879222U (en) * | 2020-04-27 | 2020-11-06 | 湖南京湘磁业有限公司 | A compounding device for magnetic processing |
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| CN108565109A (en) * | 2018-06-11 | 2018-09-21 | 彭晓领 | A kind of preparation method of soft-magnetic composite material |
| CN111681866A (en) * | 2019-03-11 | 2020-09-18 | 丰田自动车株式会社 | Method for manufacturing powder magnetic core |
| CN110233042A (en) * | 2019-06-05 | 2019-09-13 | 浙江鑫盛永磁科技有限公司 | A kind of ndfeb magnet manufacturing process |
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