CN108010658B - Radial quadrupole high-precision sine magnetizing clamp - Google Patents
Radial quadrupole high-precision sine magnetizing clamp Download PDFInfo
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- CN108010658B CN108010658B CN201711485192.XA CN201711485192A CN108010658B CN 108010658 B CN108010658 B CN 108010658B CN 201711485192 A CN201711485192 A CN 201711485192A CN 108010658 B CN108010658 B CN 108010658B
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
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Abstract
The invention discloses a radial quadrupole sine magnetizing clamp, which comprises: the magnetizing tool bears a product to be magnetized, radial four-pole magnetization is carried out on the product to be magnetized, and the magnetic distribution on the outer peripheral surface of the product is in a high-precision sine waveform; the binding post connects the magnetizing assembly and the power supply. The radial four-pole sine magnetizing clamp provided by the scheme can magnetize a bonded ferrite magnetic ring or a bonded neodymium iron boron magnetic ring, and can realize that the surface magnetism of the outer periphery of a product is distributed into sine waves.
Description
Technical Field
The invention relates to machining equipment, in particular to a magnetizing clamp.
Background
At present, the application field of magnetic materials is very wide, the magnetic circuit designs of different applications are different, the shapes and the magnetizing directions of the used magnets are also different, and the shapes of the magnets mainly comprise: cylindrical, annular, square and tile-shaped, the magnetizing direction is more common along the axial direction and the radial direction.
In a specific application, a high-precision sensor for an automobile needs a four-pole magnetizing circular ring-shaped magnet with the surface magnetism presenting standard sine wave distribution on the outer periphery, and can realize the function of precise measurement.
However, in actual production, the waveform when performing radial quadrupole magnetization is a square wave or a triangular waveform, so that the magnetic distribution on the outer peripheral surface of the product cannot be a high-precision sine waveform, and the requirements of specific applications cannot be met.
Disclosure of Invention
Aiming at the problem that the existing radial four-pole magnetizing scheme can not realize that the magnetic distribution on the outer peripheral surface of a product is sine wave, a new magnetizing scheme is needed.
Therefore, the technical problem to be solved by the invention is to provide a radial four-pole sine magnetizing clamp so as to realize that the magnetic distribution on the outer peripheral surface of a product is a high-precision sine waveform.
In order to solve the technical problem, the radial quadrupole sine magnetizing clamp provided by the invention mainly comprises:
the magnetizing tool bears a product to be magnetized, radial four-pole magnetization is carried out on the product to be magnetized, and the magnetic distribution on the outer peripheral surface of the product is in a high-precision sine waveform;
and the wiring terminal is connected with the magnetizing assembly and the power supply.
In this scheme, the frock of magnetizing includes:
the pole head part is used for bearing a product to be magnetized, generating a 4-pole radiation magnetic field perpendicular to the peripheral direction of the product for the product to be magnetized, taking the magnetic field as an external magnetizing field, magnetizing the periphery of the product, and matching with the correction iron core to enable the surface magnetism of the periphery of the product after the product is magnetized to be in sine wave distribution;
and the pushing-out part is matched with the pole head part and is used for pushing the finished magnetized product out of the pole head part.
In the scheme, the pole head part comprises an external charging iron core, an external charging winding group, a correction iron core and filling resin; the external charging iron core is wound with an external charging winding group to form an external magnetizing unit; the correction iron core is not wound with wires and penetrates through the external charging iron core, and the correction iron core and the external charging iron core are matched to enclose a magnetizing effective area for placing a product to be magnetized; and the filling resin encapsulates the matched external filling iron core and the correction iron core.
In the scheme, the pole head part also comprises a non-magnetic conductive shell and an end cover.
In the scheme, the wire inlet end of the external charging winding group is externally connected with the positive electrode of a power supply, and the wire outlet end of the external charging winding group is externally connected with the negative electrode of the power supply.
In the scheme, the external charging wire group winds the phi 2.0 copper wire for 2 turns.
In the scheme, the shape of the correction iron core is in a four-claw shape so as to correct the magnetic field generated by the external charging iron core.
In the scheme, the push-out part comprises a cushion block, a plurality of ejector rods, a push-out plate and a push-out base plate, wherein the cushion block is positioned in a magnetizing effective area formed by the matching and enclosing of the correction iron core and the external charging iron core so as to support a product to be magnetized and move up and down in the magnetizing effective area; the push-out plate is fixedly connected with the push-out base plate; the ejector rods penetrate through the pole head part, the upper ends of the ejector rods are in contact with the cushion block, and the lower ends of the ejector rods are fixed between the push-out plate and the push-out base plate.
In this scheme, a plurality of ejector pins are along circumferencial direction equidistance distribution.
The radial four-pole sine magnetizing clamp provided by the scheme can magnetize a bonded ferrite magnetic ring or a bonded neodymium iron boron magnetic ring, and can realize that the surface magnetism of the outer periphery of a product is distributed into sine waves.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a front view of a radial quadrupole sinusoidal magnetizing fixture in an example of the present invention;
FIG. 2 is a top view of a radial quadrupole sinusoidal magnetizing fixture in an example of the present invention.
Reference numerals:
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the embodiment, at the moment of electrifying, a corresponding external charging winding is utilized to generate a 4-pole radiation magnetic field vertical to the peripheral direction of the product, and the magnetic field is used as an external charging magnetic field to magnetize the periphery of the product; meanwhile, the correction iron core is matched to correct a 4-pole radiation magnetic field (external charging magnetic field) which is generated by the external charging winding and is perpendicular to the peripheral direction of the product, so that the product is saturated and magnetized by the peripheral radiation magnetic field at the moment of electrifying, and the surface magnetism of the peripheral surface of the product after magnetization is distributed in a sine wave shape.
Referring to fig. 1 and fig. 2, there are shown schematic structural diagrams of a radial quadrupole sinusoidal magnetizing fixture provided by the present example based on the above-mentioned principle. The clamp can carry out radial quadrupole magnetization on a product to be magnetized, and the magnetic distribution on the outer peripheral surface of the product is sinusoidal.
As can be seen from the figure, the radial two-pole magnetizing clamp mainly comprises a bottom plate 1, pole head parts (4, 5, 6, 8, 9, 10 and 12) fixed above the bottom plate, push-out parts (10, 11, 15 and 16) and a connecting terminal 2.
The base plate 1 serves as a base for the entire jig for carrying other component parts. The upper surface of the bottom plate 1 is a mounting surface for mounting other components, and four corners of the lower surface are respectively padded with four insulating padding feet 19, 20, 23 and 24.
The connecting terminal 2 is used for an external power supply and is fixed on the bottom plate 1 through a fourth screw 21 and a fifth screw 22.
The pole head part is a magnetizing execution part in the whole fixture and is used for bearing a product to be magnetized, and the product to be magnetized is subjected to radial four-pole magnetization by utilizing the corrected external magnetizing field, so that the magnetic distribution on the outer peripheral surface of the product is in a sine waveform shape.
The pole head part is arranged on the bottom plate 1 through the first support rod 13, the second support rod 14 and the third support rod 26 relative to the wiring terminal 2 and is fixed through the first screw 17, the second screw 18 and the third screw 27, specifically, the bottom end of the pole head part is fixedly connected through the top ends of the first support rod 13, the second support rod 14 and the third support rod 26, and the connection mode can be threaded connection; the bottom ends of the first support bar 13, the second support bar 14 and the third support bar 26 are in contact with the bottom plate 1 and are fixed by the first screw 17, the second screw 18 and the third screw 27, respectively.
In order to ensure the stability of the pole head part, the first support rod 13, the second support rod 14 and the third support rod 26 are distributed at equal intervals along the circumferential direction.
The pole head part arranged in this way is connected to the wiring terminal 2 through the magnet wire 3 and the magnet wire 25, and then is externally connected with a power supply through the wiring terminal 2.
The push-out part in the clamp is matched with the pole head part to form a magnetizing assembly of the clamp. The pushing-out part is used for pushing the finished magnetizing product out of the pole head part, is specifically arranged between the pole head part and the bottom plate, and can move up and down relative to the pole head part, so that the finished magnetizing product is pushed out of the pole head part.
When the scheme is implemented specifically, the pole head part specifically comprises a non-magnetic conduction shell 4, a correction iron core 5, an external charging iron core 9, an external charging winding group 8, an end cover 6 and filling resin 12.
The shell 4 is in an integral cylindrical shape and is divided into an upper part and a lower part, the upper part is provided with a corresponding assembly hole for arranging a corresponding external charging iron core 9 and a corresponding correction iron core 5, and meanwhile, the bottom of the upper part is provided with a mounting step for fixing the correction iron core 5; the lower portion inside the housing 4 is encapsulated with a filling resin 12.
The correction core 5 is fitted with the external charging core 9 and the external charging winding group 8 to constitute a main body part of the pole head portion. Wherein, the external charging iron core 9 is wound with the external charging winding group 8 to form an external magnetizing unit; the lower end of the outer core 9 is fixed in the fitting hole of the housing 4, and the upper end is fixed by the end cap 6 and sealed with the filling resin 13.
The correction iron core 5 is inserted into the outer iron core 9, and the lower end thereof is fixed on the mounting step of the housing 4 through the outer iron core 9 and encapsulated with the filling resin 13.
The gap formed by the matching and surrounding of the external charging iron core 9 and the correction iron core 5 is an effective magnetizing area, and the product 7 is fixed in the effective magnetizing area during magnetizing so as to magnetize the product.
Wherein, the external charging winding group 8 winds phi 2.0 copper wires for 2 turns; the correction iron core is in a 4-claw shape and is used for correcting the magnetic field generated by the external charging iron core. The number of turns of the winding wire of the correction iron core and the external charging winding group 8 in the embodiment is correspondingly matched with the diameter of the winding wire, so that the 4-pole radiation magnetic field generated by the external charging winding group 8 and perpendicular to the peripheral direction of the product is optimally corrected, and the surface magnetism of the peripheral surface of the product after being magnetized is distributed in a sine wave manner.
The push-out part in the clamp is matched with the pole head part and specifically comprises a cushion block 10, three ejector rods 11, a push-out plate 15 and a push-out cushion plate 16. The cushion block 10 is integrally arranged in a magnetizing effective area surrounded by the shell 4, the external charging iron core 9 and the correction iron core 5, namely is sleeved on the correction iron core 5 and can move up and down in the magnetizing effective area along the axial direction of the correction iron core 5. The spacer 10 is intended to be placed on the lower end of the product 7 to position the product 7 in the effective area of magnetization.
The push-out plate 15 and the push-out backing plate 16 are fixedly connected and can move up and down at a gap between the shell 4 and the bottom plate 1; the total three ejector rods 12 are distributed along the circumferential direction at 120 degrees, respectively penetrate through the housing 4 and the abdicating holes filled with the resin 12, the lower ends of the three ejector rods are fixed between the push-out plate 15 and the push-out cushion plate 16, and the upper ends of the three ejector rods are in contact with the cushion block 10. The number of rams 12 is not limited thereto and other designs may be used as desired.
The wiring terminal 2 in the clamp comprises four wiring terminals A1, A2, B1 and B2, wherein A1 is conducted with A2, B1 is conducted with B2, and open circuits are formed among A1, A2, B1 and B2. A1 external power supply positive pole, A2 connects the inlet wire end of external charging wire group 8 through magnet wire 3; b1 is connected with the negative electrode of the external power supply, B2 is connected with the outlet end of the external charging winding group 8 through the electromagnetic wire 25; the correction iron core is not provided with a winding group.
When the radial quadrupole sine magnetizing clamp constructed according to the scheme performs secondary magnetizing operation on a product 7 to be magnetized, before magnetizing starts, the lower end of the backing plate 16 is pushed out to be attached to the bottom plate 1, the lower end of the cushion block 10 is attached to the fixed step of the shell 4, the lower end of the product 7 is attached to the cushion block 10, and the product 7 is fixed in a magnetizing effective area in a pole head part;
then, a power supply is switched on, a magnetizing key is pressed down, an external charging winding is wound on an external charging iron core of the product, at the moment of electrifying, the external charging winding can generate a 4-pole radiation magnetic field vertical to the peripheral direction of the product, and the magnetic field is used as an external magnetizing field to magnetize the periphery of the product; meanwhile, the correction iron core is matched to correct a 4-pole radiation magnetic field (external charging magnetic field) which is generated by the external charging winding and is perpendicular to the peripheral direction of the product, so that the product is saturated and magnetized by the peripheral radiation magnetic field at the moment of electrifying, and the surface magnetism of the peripheral surface of the product after magnetization is distributed in a sine wave shape. The whole magnetizing process is finished at the moment of brushing.
After the magnetizing is finished, the pushing plate 15 is pushed out upwards by means of external force, and the ejector rod 11 and the cushion block 10 are driven to push out the magnetized product 7 upwards together.
For the product magnetized according to the embodiment scheme, finite element simulation calculation and test verification show that when the product is magnetized by 10KA current, the magnetic flux density at the position of the outer diameter of the product can reach 2.5T (Tesla), the magnetizing requirements of the neodymium iron boron permanent magnet material and the ferrite permanent magnet material can be met, and the magnetic distribution on the outer periphery surface of the product is a perfect sine waveform.
Therefore, the magnetizing fixture can magnetize the bonded ferrite magnetic ring or the bonded neodymium iron boron magnetic ring, and can realize that the magnetic distribution on the outer peripheral surface of the product is a high-precision sine wave.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. Radial quadrupole sine anchor clamps that magnetize, its characterized in that, anchor clamps include:
the magnetizing tool bears a product to be magnetized, radial four-pole magnetization is carried out on the product to be magnetized, and the magnetic distribution on the outer peripheral surface of the product is in a high-precision sine waveform; the magnetizing tool comprises a pole head part and a push-out part; the pole head part bears a product to be magnetized, and generates a 4-pole radiation magnetic field perpendicular to the peripheral direction of the product, the magnetic field is used as an external magnetic field to magnetize the periphery of the product, and the external magnetic field is corrected by matching with a correction iron core, so that the surface magnetism of the peripheral surface of the product after magnetization is distributed in a sine wave shape; the pole head part comprises an external charging iron core, an external charging winding group, a correction iron core and filling resin; the external charging iron core is wound with an external charging winding group to form an external magnetizing unit; the correction iron core is not wound with wires and penetrates through the external charging iron core, and the correction iron core and the external charging iron core are matched to enclose a magnetizing effective area for placing a product to be magnetized; the filling resin encapsulates the matched external filling iron core and the correction iron core; the external charging winding group 8 winds phi 2.0 copper wires for 2 turns; the correction iron core is in a 4-claw shape and is used for correcting a magnetic field generated by the external charging iron core; the number of winding turns of the correction iron core and the external charging winding group 8 are correspondingly matched with the diameter of the winding wire, so that the 4-pole radiation magnetic field generated by the external charging winding group 8 and vertical to the peripheral direction of the product is optimally corrected, and the surface magnetism of the peripheral surface of the product after being magnetized is distributed in a sine wave manner; the push-out part is matched with the pole head part and used for pushing the magnetized product out of the pole head part;
and the wiring terminal is connected with the magnetizing assembly and the power supply.
2. The radial quadrupole sinusoidal magnetizing fixture of claim 1, further comprising a non-magnetically conductive housing and an end cap in the pole head portion.
3. The radial quadrupole sine magnetizing clamp according to claim 1, wherein the wire inlet end of the outer charging winding set is externally connected with a positive power supply, and the wire outlet end of the outer charging winding set is externally connected with a negative power supply.
4. The radial quadrupole sine magnetizing clamp of claim 1, wherein the push-out part comprises a cushion block, a plurality of ejector rods, a push-out plate and a push-out base plate, the cushion block is positioned in a magnetizing effective area formed by the matching and enclosing of the correction iron core and the external charging iron core so as to support a product to be magnetized and move up and down in the magnetizing effective area; the push-out plate is fixedly connected with the push-out base plate; the ejector rods penetrate through the pole head part, the upper ends of the ejector rods are in contact with the cushion block, and the lower ends of the ejector rods are fixed between the push-out plate and the push-out base plate.
5. The radial quadrupole sinusoidal magnetizing fixture of claim 4, wherein the plurality of ejector rods are equidistantly distributed along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485192.XA CN108010658B (en) | 2017-12-29 | 2017-12-29 | Radial quadrupole high-precision sine magnetizing clamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485192.XA CN108010658B (en) | 2017-12-29 | 2017-12-29 | Radial quadrupole high-precision sine magnetizing clamp |
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| CN108010658A CN108010658A (en) | 2018-05-08 |
| CN108010658B true CN108010658B (en) | 2020-11-24 |
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| CN201711485192.XA Active CN108010658B (en) | 2017-12-29 | 2017-12-29 | Radial quadrupole high-precision sine magnetizing clamp |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616277B (en) * | 2018-12-28 | 2021-02-12 | 上海三环磁性材料有限公司 | End surface multipolar permanent magnet sine wave magnetizing clamp |
| CN111105918B (en) * | 2019-12-31 | 2022-07-29 | 上海三环磁性材料有限公司 | Compound magnetization device of permanent magnet rotor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008848A (en) * | 2013-12-20 | 2014-08-27 | 横店集团东磁股份有限公司 | Multi-pole magnetization device for magnetic ring |
| KR101556214B1 (en) * | 2014-03-28 | 2015-09-30 | (주)대한특수금속 | Magnetizing yoke device with cooling system |
| CN106710784A (en) * | 2016-12-30 | 2017-05-24 | 上海三环磁性材料有限公司 | Radial two-pole magnetizing fixture |
| CN107393679A (en) * | 2017-07-28 | 2017-11-24 | 始兴县标准微型马达有限公司 | A kind of DC micromotor magnetizer and the component that magnetizes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2399807Y (en) * | 1999-12-14 | 2000-10-04 | 皖南氟塑料泵阀厂 | Multiple polar heads magnetizing clamps |
| US9620275B2 (en) * | 2014-05-28 | 2017-04-11 | Baldor Electric Company | Method of constructing a rotor for a line start interior permanent magnet motor |
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2017
- 2017-12-29 CN CN201711485192.XA patent/CN108010658B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008848A (en) * | 2013-12-20 | 2014-08-27 | 横店集团东磁股份有限公司 | Multi-pole magnetization device for magnetic ring |
| KR101556214B1 (en) * | 2014-03-28 | 2015-09-30 | (주)대한특수금속 | Magnetizing yoke device with cooling system |
| CN106710784A (en) * | 2016-12-30 | 2017-05-24 | 上海三环磁性材料有限公司 | Radial two-pole magnetizing fixture |
| CN107393679A (en) * | 2017-07-28 | 2017-11-24 | 始兴县标准微型马达有限公司 | A kind of DC micromotor magnetizer and the component that magnetizes |
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