Magnetization clamp and isotropic plane dipolar sine wave magnetization method

Abstract

The invention discloses a magnetizing clamp and a same-polarity plane dipolar sine wave magnetizing method, and belongs to the technical field of magnetis.The magnetizing clamp comprises a bearing platform and magnetizing pole heads, the magnetizing pole heads comprise the first pole head and the second pole head, the first pole head and the second pole head are arranged on the bearing platform in parallel, and the magnetizing ends of the first pole head and the second pole head are in a spherical surface shape; and coils are arranged on the first pole head and the second pole head. The like-polarity planar dipolar sine wave magnetization method is implemented by adopting the magnetization clamp and comprises the following steps: S1, placing a circular-ring-shaped product to be magnetized on one side of the magnetization ends of the first pole head and the second pole head, and enabling the inner diameter and the outer diameter of the product to be magnetized to be at the median position; and S2, the magnetization clamp is connected into a magnetizer, and the product to be magnetized is magnetized. According to the scheme, the sinusoidal waveform magnetic field intensity can be formed after the annular product to be magnetized is magnetized, so that the production requirements of enterprises are met.

Description

Technical Field

[0001] The invention relates to a magnetizing fixture and a magnetizing method, and more particularly to a magnetizing fixture and a homopolar plane two-pole sinusoidal wave magnetizing method. Background Art

[0002] With the increasing application of magnetic materials, some companies require more and more methods and types of magnetization and testing, and the samples (circular) are homogeneous products with medium inner and outer diameters and thin thickness. Although the sample size tolerance is not strict, there are special requirements for the surface magnetic density distribution, which is mainly manifested in the 360° surface magnetic test at 1-2mm above the inner and outer diameter median (above the thickness median) instead of close to the surface of the magnetized area during the test, and the peak value is ≥750Gs, and the waveform is a standard sine wave (such as Figure 1 As shown), the magnetization requirement cannot be achieved using the existing traditional magnetization method.

[0003] For example: Chinese patent announcement number CN204257316U, announcement date April 8, 2015, the name of the invention is a planar multi-pole magnetization device of a large outer diameter and high thickness magnetic ring, including a base, a magnetizing mechanism is provided on the top of the base, a cooling device is provided at the bottom of the base, and a non-magnetic thin sheet is provided on the upper end face of the magnetizing mechanism. This solution directly applies a thin layer of wear-resistant and smooth material on the surface of a large-size magnetizing fixture, thereby reducing the pulling resistance and thereby increasing the pulling speed, but it does not involve the waveform problem of the magnetic pole. Summary of the invention

[0004] The present invention overcomes the problem that the traditional magnetizing fixture cannot form a sinusoidal magnetic field strength after magnetizing the sample to be magnetized, and provides a magnetizing fixture and a homosexual plane dipole sinusoidal magnetization method. This scheme can form a sinusoidal magnetic field strength after magnetizing the circular ring-shaped product to be magnetized to meet the production needs of the enterprise.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a magnetizing fixture, including a support platform and a magnetizing pole head, the magnetizing pole head includes a first pole head and a second pole head, the first pole head and the second pole head are arranged in parallel on the support platform, the magnetizing ends of the first pole head and the second pole head are spherical, and coils are arranged on the first pole head and the second pole head. In this solution, the support platform is used to place the magnetizing pole head, the magnetizing pole head can generate a magnetic field, and the product to be magnetized is magnetized by the magnetic field generated by the magnetizing pole head. The first pole head and the second pole head are respectively used to form two symmetrical magnetic poles on the product to be magnetized, wherein one end of the first pole head and the second pole head used for magnetizing the product is spherical, so that the magnetic lines of force generated at the magnetizing ends of the first pole head and the second pole head are uniformly divergent, and the magnetic field intensity generated by the magnetization of the product part close to the magnetizing end is higher, and the magnetic field intensity of the product part farther from the magnetizing end is lower, so that the product to be magnetized can form a sinusoidal magnetic field intensity distribution to meet the production needs of the enterprise.

[0006] Preferably, a jacket is provided on the support platform, the first pole head and the second pole head are provided in the jacket, and curing glue is provided between the jacket and the magnetizing pole head. The jacket is used to hold the magnetizing pole head and the curing glue, so as to ensure that the first pole head and the second pole head can be stably fixed on the support platform. After the curing glue solidifies, the first pole head and the second pole head need to be kept parallel and fixed in position.

[0007] Preferably, the curing glue is filled in the outer shell and is flush with the outer shell and the end of the magnetizing pole head. After the curing glue is filled in the outer shell, the first pole head and the second pole head are wrapped, and the filling height is flush with the magnetizing end of the magnetizing pole head, which is conducive to arranging the product to be magnetized on the upper part of the first pole head and the second pole head.

[0008] Preferably, a cooling pool is provided in the support, and a water inlet and a water outlet are provided on the cooling pool. The cooling pool is arranged in the support to take away the heat generated by the coil during the magnetization process and reduce the temperature of the magnetization fixture. The water inlet and the water outlet on the cooling pool can keep the cooling water in the cooling pool flowing to ensure the cooling effect.

[0009] Preferably, the thickness of the support on which the magnetized pole head is arranged is 8 mm to 15 mm. The thickness of the support is designed to be between 8 mm and 15 mm. If the thickness of the support is too large, the heat conduction efficiency will be reduced. If the thickness is too small, the heat conduction efficiency will be improved, but the magnetic conduction capacity will be reduced.

[0010] As a preferred embodiment, the material of the outer jacket is 45# steel. The outer jacket can be made of 45# steel, which can prevent the outer jacket from being softened by heat when the curing glue is poured and heated.

[0011] A homosexual plane two-pole sinusoidal wave magnetization method is implemented using the above-mentioned magnetization fixture, and includes the following steps: S1: placing the annular product to be magnetized on one side of the magnetization end of the first pole head and the second pole head, and making the inner and outer diameters of the product to be magnetized at the median position; S2: connecting the magnetization fixture to the magnetizer to magnetize the product to be magnetized. In this scheme, the first pole head and the second pole head are arranged at the median position of the inner and outer diameters of the annular product to be magnetized, so as to ensure that after the magnetized product is magnetized, the magnetic field strength on both sides of the inner and outer diameters of the product can also form a distribution with a large middle and small sides; finally, the magnetization fixture is connected to the magnetizer for magnetization to complete the magnetization of the product.

[0012] Preferably, the first pole head and the second pole head are arranged on two symmetrical sides of the product to be magnetized. The first pole head and the second pole head are symmetrically arranged on the product to be magnetized, and symmetrical magnetization is formed on the two symmetrical sides of the product to be magnetized.

[0013] Preferably, the coil currents connected to the first pole and the second pole are in opposite directions. The coil currents on the first pole and the second pole are opposite, and it is necessary to ensure that the current magnitude of the coil on the first pole is the same as the current magnitude of the coil on the second pole, so that the magnetic field strengths generated on the first pole and the second pole are the same and opposite in direction, and a sinusoidal magnetic field strength can be formed after the magnetized product is magnetized.

[0014] Preferably, the number of coil turns is 30 to 40, and the wire diameter of the coil is 1 mm to 1.5 mm. The number of coil turns is set to 30 to 40, and the wire diameter is set to between 1 mm and 1.5 mm. The specific settings are adjusted according to the actual required magnetized products.

[0015] Compared with the prior art, the present invention has the following advantages: (1) the overall structure of the magnetizing fixture is simple, the magnetizing method is simple and easy to implement, and the production efficiency of the enterprise is improved; (2) the magnetizing effect is stable, and the circular ring-shaped product to be magnetized can be magnetized to form a sinusoidal magnetic field strength to meet the production needs of the enterprise; (3) it has a cooling system to ensure the service life of the magnetizing fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a diagram showing the surface magnetic test of the magnetized product of the present invention.

[0017] Figure 2 Schematic diagram of the magnetizing fixture of the present invention.

[0018] Figure 3 It is a side view of the magnetized pole head and the support platform of the present invention.

[0019] Figure 4 It is a schematic diagram of the sinusoidal magnetic field distribution formed after the magnetized product of the present invention is magnetized.

[0020] In the figure: 1. base, 2. first pole, 3. second pole, 4. spiral coil tube, 5. outer jacket, 6. curing glue, 7. cooling pool, 8. water outlet, 9. water inlet, 10. product to be magnetized, 11. surface magnetic tester. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0022] Example 1: Figures 2 to 4 A magnetizing fixture and a homogeneous plane two-pole sinusoidal wave magnetizing method are shown; the magnetizing fixture includes a support platform 1, and a magnetizing pole head is arranged on the upper surface of the support platform 1, and the magnetizing pole head includes a first pole head 2 and a second pole head 3, and the first pole head 2 and the second pole head 3 both include a magnetizing end and a fixed end, and the fixed end of the first pole head 2 and the fixed end of the second pole head 3 are close to the upper surface of the support platform 1 and contact the upper surface of the support platform 1, while the magnetizing end of the first pole head 2 and the magnetizing end of the second pole head 3 are arranged upward at a position away from the upper surface of the support platform 1. The first pole head 2 and the second pole head 3 are both cylindrical structures, and the first pole head 2 and the second pole head 3 are arranged in parallel on the upper surface of the support platform 1; a spiral coil tube 4 is arranged on the first pole head 2 and the second pole head 3, and specifically, the spiral coil tube 4 is sleeved on the outside of the first pole head 2 and the second pole head 3. When current is passed through the spiral coil 4, the first pole head 1 and the second pole head 2 are magnetized to form an electromagnet, generating a magnetic field.

[0023] In the present solution, the support platform 1 is used to place the magnetizing pole head, which can generate a magnetic field. The product 10 to be magnetized is magnetized by the magnetic field generated by the magnetizing pole head. The first pole head 2 and the second pole head 3 are respectively used to form two symmetrical magnetic poles on the product 10 to be magnetized, wherein one end of the first pole head 2 and the second pole head 3 used for magnetizing the product is spherical in shape, so that the magnetic lines of force generated at the magnetizing ends of the first pole head 2 and the second pole head 3 are uniformly divergent, and the surface of the product to be magnetized is close to the top position of the spherical surface of the first pole head 2 and the second pole head 3, and the magnetic field intensity generated by the magnetization of the product part close to the magnetizing end is higher, and the magnetic field intensity of the product part farther away from the magnetizing end after magnetization is lower, so that the product 10 to be magnetized can form a sinusoidal magnetic field intensity distribution to meet the production needs of the enterprise.

[0024] It should be noted that the product 10 to be magnetized in this solution is a circular ring structure, and the first pole head 2 and the second pole head 3 are respectively arranged at two symmetrical positions of the product 10 to be magnetized, so that two symmetrically distributed magnetic field intensities can be generated on the product 10 to be magnetized. Specifically, Figure 4 As shown, the design of this scheme requires that the magnetic field strength of the product to be magnetized 10 forms a sine wave distribution, that is, when the surface magnetic test of the magnetized product is performed, the magnetic field strength of the magnetized product is measured to be Figure 4 The waveform is consistent. Specifically, Figure 1 The following is a surface magnetic test method for the product. The main performance is that during the test, the surface magnetic test is performed 360° at a distance of 1mm to 2mm above the median of the inner and outer diameters of the magnetized product instead of being close to the surface of the magnetized area. The measured results are similar to Figure 4 The waveform is consistent, and the maximum measured surface magnetism is greater than 750Gs. On the product 10 to be magnetized and located at the position of the symmetry plane of the first pole head 2 and the second pole head 3, the magnetic field intensity on the product 10 to be magnetized is zero, and on the product 10 to be magnetized and located at the position of the first pole head 2 and the second pole head 3, the magnetic field intensity corresponding to the product 10 to be magnetized reaches the two peak positions of the sine wave.

[0025] In order to ensure that the magnetic field strengths of the N pole and the S pole at the left and right ends of the product 10 to be magnetized are the same, the spiral coil tube 4 on the first pole head 2 and the spiral coil tube 4 on the second pole head 3 are connected in series, that is, the currents on the two spiral coil tubes 4 are the same; in addition, the spiral directions of the spiral coil tube 4 on the first pole head 2 and the spiral coil tube 4 on the second pole head 3 are opposite, ensuring that the first pole head 2 and the second pole head 3 can generate magnetic fields of the same size and opposite directions to magnetize the product 10 to be magnetized.

[0026] A method for isotropic planar dipole sinusoidal wave magnetization is implemented using the above-mentioned magnetization fixture and includes the following steps.

[0027] First, the first pole head 2 and the second pole head 3 are arranged on the support platform 1 so that the distance between the first pole head 2 and the second pole head 3 matches the distance between the median positions of the inner and outer diameters of the symmetrical points on both sides of the annular product 10 to be magnetized.

[0028] Then the wire is wound into a coil of a predetermined shape, and the wound spiral coil tube 4 is placed on the first pole head 2 and the second pole head 3 that have been insulated. The spiral coil tubes 4 on the first pole head 2 and the second pole head 3 are connected in series and the spiral directions of the two spiral coil tubes 4 are opposite.

[0029] Connect the magnetizing fixture to the magnetizing machine and perform magnetization according to the pre-determined magnetizing process to complete the magnetization of the product to be magnetized.

[0030] Among them, some parameters of the magnetizer and coil are shown in the following table.

[0031] In addition, in this embodiment, the height H of the first pole head 2 and the second pole head 3 is 20 to 30 mm, and the pole head radius R of the magnetized end of the first pole head 2 and the second pole head 3 is 5 to 10 mm. In the actual production process, the parameters of each structure can be optimized according to the requirements.

[0032] Example 2: Figures 2 to 4 A magnetizing fixture and a homogeneous plane two-pole sinusoidal wave magnetizing method are shown; the magnetizing fixture includes a support platform 1, and a magnetizing pole head is arranged on the upper surface of the support platform 1, and the magnetizing pole head includes a first pole head 2 and a second pole head 3, and the first pole head 2 and the second pole head 3 both include a magnetizing end and a fixed end, and the fixed end of the first pole head 2 and the fixed end of the second pole head 3 are close to the upper surface of the support platform 1 and contact the upper surface of the support platform 1, while the magnetizing end of the first pole head 2 and the magnetizing end of the second pole head 3 are arranged upward at a position away from the upper surface of the support platform 1. The first pole head 2 and the second pole head 3 are both cylindrical structures, and the first pole head 2 and the second pole head 3 are arranged in parallel on the upper surface of the support platform 1; a spiral coil tube 4 is arranged on the first pole head 2 and the second pole head 3, and specifically, the spiral coil tube 4 is sleeved on the outside of the first pole head 2 and the second pole head 3. When current is passed through the spiral coil 4, the first pole head 1 and the second pole head 2 are magnetized to form an electromagnet, generating a magnetic field.

[0033] In the present solution, the support platform 1 is used to place the magnetizing pole head, which can generate a magnetic field. The product 10 to be magnetized is magnetized by the magnetic field generated by the magnetizing pole head. The first pole head 2 and the second pole head 3 are respectively used to form two symmetrical magnetic poles on the product 10 to be magnetized, wherein one end of the first pole head 2 and the second pole head 3 used for magnetizing the product is spherical in shape, so that the magnetic lines of force generated at the magnetizing ends of the first pole head 2 and the second pole head 3 are uniformly divergent, and the surface of the product to be magnetized is close to the top position of the spherical surface of the first pole head 2 and the second pole head 3, and the magnetic field intensity generated by the magnetization of the product part close to the magnetizing end is higher, and the magnetic field intensity of the product part farther away from the magnetizing end after magnetization is lower, so that the product 10 to be magnetized can form a sinusoidal magnetic field intensity distribution to meet the production needs of the enterprise.

[0034] It should be noted that the product 10 to be magnetized in this solution is a circular ring structure, and the first pole head 2 and the second pole head 3 are respectively arranged at two symmetrical positions of the product 10 to be magnetized, so that two symmetrically distributed magnetic field intensities can be generated on the product 10 to be magnetized. Specifically, Figure 4 As shown, the design of this scheme requires that the magnetic field strength of the product to be magnetized 10 forms a sine wave distribution, that is, when the surface magnetic test of the magnetized product is performed, the magnetic field strength of the magnetized product is measured to be Figure 4 The waveform is consistent. Specifically, Figure 1 The following is a surface magnetic test method for the product. The main performance is that during the test, the surface magnetic test is performed 360° at a distance of 1mm to 2mm above the median of the inner and outer diameters of the magnetized product instead of being close to the surface of the magnetized area. The measured results are similar to Figure 4The waveform is consistent, and the maximum measured surface magnetism is greater than 750Gs. On the product 10 to be magnetized and located at the position of the symmetry plane of the first pole head 2 and the second pole head 3, the magnetic field intensity on the product 10 to be magnetized is zero, and on the product 10 to be magnetized and located at the position of the first pole head 2 and the second pole head 3, the magnetic field intensity corresponding to the product 10 to be magnetized reaches the two peak positions of the sine wave.

[0035] In order to ensure that the magnetic field strengths of the N pole and the S pole at the left and right ends of the product 10 to be magnetized are the same, the spiral coil tube 4 on the first pole head 2 and the spiral coil tube 4 on the second pole head 3 are connected in series, that is, the currents on the two spiral coil tubes 4 are the same; in addition, the spiral directions of the spiral coil tube 4 on the first pole head 2 and the spiral coil tube 4 on the second pole head 3 are opposite, ensuring that the first pole head 2 and the second pole head 3 can generate magnetic fields of the same size and opposite directions to magnetize the product 10 to be magnetized.

[0036] A jacket 5 is also provided on the upper surface of the base 1. The jacket 5 is an annular columnar structure. The jacket 5 is fixed on the upper surface of the base 1, and the first pole head 2 and the second pole head 3 are both located inside the jacket 5 and are symmetrically distributed inside the jacket 5. A curing glue 6 is also provided inside the jacket 5. The specific curing glue 6 is made of epoxy resin glue and fills the filling area where the magnetizing pole head is located, so that the filling height of the curing glue 6 is just flush with the magnetizing end of the magnetizing pole head; in this way, the curing glue 6 can also be used as a placement position for the product 10 to be magnetized, which is beneficial to the arrangement of the product 10 to be magnetized.

[0037] The outer sleeve 5 is made of 45 steel, so that during the heating and curing process of the curing glue 6, the outer sleeve 5 will not be softened by high temperature, affecting the distribution of the outer sleeve 5 and the curing glue 6, preventing the position of the first pole head 2 and the second pole head 3 from changing, and ensuring the magnetization effect of the product 10 to be magnetized.

[0038] A method for isotropic planar dipole sinusoidal wave magnetization is implemented using the above-mentioned magnetization fixture and includes the following steps.

[0039] First, the first pole head 2 and the second pole head 3 are arranged on the support platform 1 so that the distance between the first pole head 2 and the second pole head 3 matches the distance between the median positions of the inner and outer diameters of the symmetrical points on both sides of the annular product 10 to be magnetized.

[0040] Then the wire is wound into a coil of a predetermined shape, and the wound spiral coil tube 4 is placed on the first pole head 2 and the second pole head 3 that have been insulated. The spiral coil tubes 4 on the first pole head 2 and the second pole head 3 are connected in series and the spiral directions of the two spiral coil tubes 4 are opposite.

[0041] Fix the jacket 5 on the designated position of the base 1, and seal the area where the curing glue 6 is filled. Take an appropriate amount of epoxy resin glue mixed evenly in a certain ratio and fill it up in the area to be filled in the magnetizing fixture. Then heat and cure the fixture. After all the preparations before magnetization are completed, the fixture is assembled.

[0042] Connect the magnetizing fixture to the magnetizing machine and perform magnetization according to the pre-determined magnetizing process to complete the magnetization of the product to be magnetized.

[0043] Among them, some parameters of the magnetizer and coil are shown in the following table.

[0044] In addition, in this embodiment, the height H of the first pole head 2 and the second pole head 3 is 20 to 30 mm, and the pole head radius R of the magnetized end of the first pole head 2 and the second pole head 3 is 5 to 10 mm. In the actual production process, the parameters of each structure can be optimized according to the requirements.

[0045] Example 3: Figures 2 to 4 A magnetizing fixture and a homogeneous plane two-pole sinusoidal wave magnetizing method are shown; the magnetizing fixture includes a support platform 1, and a magnetizing pole head is arranged on the upper surface of the support platform 1, and the magnetizing pole head includes a first pole head 2 and a second pole head 3, and the first pole head 2 and the second pole head 3 both include a magnetizing end and a fixed end, and the fixed end of the first pole head 2 and the fixed end of the second pole head 3 are close to the upper surface of the support platform 1 and contact the upper surface of the support platform 1, while the magnetizing end of the first pole head 2 and the magnetizing end of the second pole head 3 are arranged upward at a position away from the upper surface of the support platform 1. The first pole head 2 and the second pole head 3 are both cylindrical structures, and the first pole head 2 and the second pole head 3 are arranged in parallel on the upper surface of the support platform 1; a spiral coil tube 4 is arranged on the first pole head 2 and the second pole head 3, and specifically, the spiral coil tube 4 is sleeved on the outside of the first pole head 2 and the second pole head 3. When current is passed through the spiral coil 4, the first pole head 1 and the second pole head 2 are magnetized to form an electromagnet, generating a magnetic field.

[0046] In the present solution, the support platform 1 is used to place the magnetizing pole head, which can generate a magnetic field. The product 10 to be magnetized is magnetized by the magnetic field generated by the magnetizing pole head. The first pole head 2 and the second pole head 3 are respectively used to form two symmetrical magnetic poles on the product 10 to be magnetized, wherein one end of the first pole head 2 and the second pole head 3 used for magnetizing the product is spherical in shape, so that the magnetic lines of force generated at the magnetizing ends of the first pole head 2 and the second pole head 3 are uniformly divergent, and the surface of the product to be magnetized is close to the top position of the spherical surface of the first pole head 2 and the second pole head 3, and the magnetic field intensity generated by the magnetization of the product part close to the magnetizing end is higher, and the magnetic field intensity of the product part farther away from the magnetizing end after magnetization is lower, so that the product 10 to be magnetized can form a sinusoidal magnetic field intensity distribution to meet the production needs of the enterprise.

[0047] It should be noted that the product 10 to be magnetized in this solution is a circular ring structure, and the first pole head 2 and the second pole head 3 are respectively arranged at two symmetrical positions of the product 10 to be magnetized, so that two symmetrically distributed magnetic field intensities can be generated on the product 10 to be magnetized. Specifically, Figure 4 As shown, the design of this scheme requires that the magnetic field strength of the product to be magnetized 10 forms a sine wave distribution, that is, when the surface magnetic test of the magnetized product is performed, the magnetic field strength of the magnetized product is measured to be Figure 4 The waveform is consistent. Specifically, Figure 1 The following is a surface magnetic test method for the product. The main performance is that during the test, the surface magnetic test is performed 360° at a distance of 1mm to 2mm above the median of the inner and outer diameters of the magnetized product instead of being close to the surface of the magnetized area. The measured results are similar to Figure 4 The waveform is consistent, and the maximum measured surface magnetism is greater than 750Gs. On the product 10 to be magnetized and located at the position of the symmetry plane of the first pole head 2 and the second pole head 3, the magnetic field intensity on the product 10 to be magnetized is zero, and on the product 10 to be magnetized and located at the position of the first pole head 2 and the second pole head 3, the magnetic field intensity corresponding to the product 10 to be magnetized reaches the two peak positions of the sine wave.

[0048] In order to ensure that the magnetic field strengths of the N pole and the S pole at the left and right ends of the product 10 to be magnetized are the same, the spiral coil tube 4 on the first pole head 2 and the spiral coil tube 4 on the second pole head 3 are connected in series, that is, the currents on the two spiral coil tubes 4 are the same; in addition, the spiral directions of the spiral coil tube 4 on the first pole head 2 and the spiral coil tube 4 on the second pole head 3 are opposite, ensuring that the first pole head 2 and the second pole head 3 can generate magnetic fields of the same size and opposite directions to magnetize the product 10 to be magnetized.

[0049] A jacket 5 is also provided on the upper surface of the base 1. The jacket 5 is an annular columnar structure. The jacket 5 is fixed on the upper surface of the base 1, and the first pole head 2 and the second pole head 3 are both located inside the jacket 5 and are symmetrically distributed inside the jacket 5. A curing glue 6 is also provided inside the jacket 5. The specific curing glue 6 is made of epoxy resin glue and fills the filling area where the magnetizing pole head is located, so that the filling height of the curing glue 6 is just flush with the magnetizing end of the magnetizing pole head; in this way, the curing glue 6 can also be used as a placement position for the product 10 to be magnetized, which is beneficial to the arrangement of the product 10 to be magnetized.

[0050] The outer sleeve 5 is made of 45 steel, so that during the heating and curing process of the curing glue 6, the outer sleeve 5 will not be softened by high temperature, affecting the distribution of the outer sleeve 5 and the curing glue 6, preventing the position of the first pole head 2 and the second pole head 3 from changing, and ensuring the magnetization effect of the product 10 to be magnetized.

[0051] It should also be noted that a cooling pool 7 is provided at the bottom of the base 1. The cooling pool 7 is arranged directly below the magnetizing pole head on the base 1. A water inlet 9 and a water outlet 8 are provided in the cooling pool 7. The water inlet 9 and the water outlet 8 are respectively arranged on opposite sides of the base 1 to ensure that cooling water can enter from one side of the base 1 and flow out from the other side, thereby effectively taking away the heat generated by the magnetizing fixture.

[0052] The water inlet 9 is arranged at a position lower than the water outlet 8, and the water outlet 8 is arranged close to the plane where the magnetized pole head is arranged on the support 1, so as to ensure that the water outlet 8 can be as close to the top as possible, and play an effective cooling role. The thickness of the support 1 arranged with the magnetized pole head is designed to be between 8mm and 15mm. If the thickness of the support 1 is too large, the heat conduction efficiency will be reduced. If the thickness is too small, the heat conduction efficiency will be improved, but the magnetic conduction capacity will be reduced.

[0053] A method for isotropic planar dipole sinusoidal wave magnetization is implemented using the above-mentioned magnetization fixture and includes the following steps.

[0054] First, the first pole head 2 and the second pole head 3 are arranged on the support platform 1 so that the distance between the first pole head 2 and the second pole head 3 matches the distance between the median positions of the inner and outer diameters of the symmetrical points on both sides of the annular product 10 to be magnetized.

[0055] Then the wire is wound into a coil of a predetermined shape, and the wound spiral coil tube 4 is placed on the first pole head 2 and the second pole head 3 that have been insulated. The spiral coil tubes 4 on the first pole head 2 and the second pole head 3 are connected in series and the spiral directions of the two spiral coil tubes 4 are opposite.

[0056] Fix the jacket 5 on the designated position of the base 1, and seal the area where the curing glue 6 is filled. Take an appropriate amount of epoxy resin glue mixed evenly in a certain ratio and fill it up in the area to be filled in the magnetizing fixture. Then heat and cure the fixture. After all the preparations before magnetization are completed, the fixture is assembled.

[0057] The magnetizing fixture is connected to the magnetizing machine, and magnetization is performed according to a predetermined magnetizing process. At the same time, cooling water is introduced into the cooling pool 7 to complete the magnetization of the product to be magnetized.

[0058] Among them, some parameters of the magnetizer and coil are shown in the following table.

[0059] In addition, in this embodiment, the height H of the first pole head 2 and the second pole head 3 is 20 to 30 mm, and the pole head radius R of the magnetized end of the first pole head 2 and the second pole head 3 is 5 to 10 mm. In the actual production process, the parameters of each structure can be optimized according to the requirements.

Claims

1. A magnetizing fixture, characterized in that: It includes a support platform and a magnetizing pole head. The magnetizing pole head includes a first pole head and a second pole head. The first pole head and the second pole head are arranged on the support platform in parallel. The magnetizing ends of the first pole head and the second pole head are spherical. Coils are arranged on the first pole head and the second pole head.

2. A magnetizing fixture according to claim 1, characterized in that: A jacket is arranged on the support platform, the first pole head and the second pole head are arranged in the jacket, and curing glue is arranged between the jacket and the magnetized pole head.

3. A magnetizing fixture according to claim 2, characterized in that: The curing adhesive is filled in the outer casing and is flush with the outer casing and the end of the magnetizing pole head.

4. A magnetizing fixture according to any one of claims 1 to 3, characterized in that: A cooling pool is arranged in the support platform, and a water inlet and a water outlet are arranged on the cooling pool.

5. A magnetizing fixture according to claim 4, characterized in that: The thickness of the support on which the magnetized pole head is arranged is 8 mm to 15 mm.

6. A magnetizing fixture according to claim 2 or 3, characterized in that: The material of the outer jacket is 45# steel.

7. A method for isotropic planar dipole sinusoidal magnetization, implemented by using a magnetization fixture as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1: placing the annular product to be magnetized on one side of the magnetizing end of the first pole head and the second pole head, and making the inner and outer diameters of the product to be magnetized at the middle position; S2: Connect the magnetizing fixture to the magnetizing machine to magnetize the product to be magnetized.

8. The isotropic planar dipole sinusoidal wave magnetization method according to claim 7, characterized in that: The first pole head and the second pole head are arranged on two symmetrical sides of the product to be magnetized.

9. The isotropic planar dipole sinusoidal wave magnetization method according to claim 7, characterized in that: The directions of the coil currents connected to the first pole and the second pole are opposite.

10. The isotropic planar dipole sinusoidal wave magnetization method according to claim 9, characterized in that: The number of turns of the coil is 30 to 40, and the wire diameter of the coil is 1 mm to 1.5 mm.

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