CN113904479B

CN113904479B - Magnetic part, vibration device, magnetizer and integrated magnetizing method

Info

Publication number: CN113904479B
Application number: CN202111062238.3A
Authority: CN
Inventors: 陈娟; 曹洪斌
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2023-03-21
Anticipated expiration: 2041-09-10
Also published as: CN113904479A; WO2023036301A1

Abstract

The invention discloses a magnetic part, a vibration device, a magnetizer and an integrated magnetizing method, wherein the magnetic part comprises at least two magnet parts (10), and each magnet part (10) comprises two magnetic poles; and the non-magnetic parts (11) are arranged between the two adjacent magnetic parts (10), and the magnetic poles of the magnetic parts (10) and the non-magnetic parts (11) are arranged along the axis of the magnetic part. The vibration device of the present invention includes a magnetic member. The magnetizer and the integrated magnetizing method are used for manufacturing the magnetic piece. According to the invention, the magnetic part is an integrated part, the dimensional accuracy of the magnetic part can be ensured through a processing technology, compared with a mode of connecting through a plurality of magnets, the magnetic part is higher in dimensional accuracy, and higher assembly accuracy can be obtained when the magnetic part is assembled with other parts, so that the overall operation performance of a product is improved.

Description

Magnetic part, vibration device, magnetizer and integrated magnetizing method

Technical Field

The invention relates to the technical field of magnetization, in particular to a magnetic part, a vibration device, a magnetizer and an integrated magnetization method.

Background

Magnetic materials, such as magnets, which are magnetic and can attract ferromagnetic substances, are widely used in daily production and daily life, for example, as vibrators of vibration devices such as bone conduction sound generators and linear vibration motors.

In order to increase the magnetic force of the vibrator, the vibrator generally includes a plurality of magnets, and adjacent two magnets are separated by a magnetizer. The number of the parts is increased by the plurality of connected magnets and the magnetizers, so that the assembly is more difficult, and the precision of the assembly is poor. In addition, a plurality of connected magnets need to use magnetizer intervals, so that the whole volume is increased, and the utilization rate of space is influenced.

A bone conduction sound generator or a linear vibration motor, which is an example of a vibration device, generally includes a housing, a coil connected to the housing, and a vibrator coupled in the coil, where the vibrator includes a plurality of magnets and a magnetizer connected between two adjacent magnets. When the coil is energized, the vibrator can vibrate reciprocally in response to changes in the magnetic field of the coil. The existing vibrator is formed by connecting a plurality of parts, so that the size of the vibrator is large, repulsion exists between a magnet and the magnet in the assembling process, the assembling process is complex, the size of an assembly after assembling is difficult to guarantee, the assembling precision between the vibrator and a coil is further difficult to guarantee, the vibrator is easy to contact with the coil or surrounding parts in the vibrating process, the sounding quality is influenced or the noise is overlarge, and related parts are damaged even due to impact.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

Disclosure of Invention

The invention aims to provide a magnetic part, a vibration device, a magnetizer and an integrated magnetizing method, wherein the size precision of the magnetic part is easier to guarantee.

To achieve the above object, according to a first aspect, the present invention provides a magnetic member, including:

at least two magnet portions, each of the magnet portions comprising two magnetic poles; and

and the non-magnetic parts are arranged between the adjacent two magnet parts, and the magnetic poles of the magnet parts and the non-magnetic parts are arranged along the axis of the magnetic part.

Further, the polarities of the two adjacent magnetic poles of the two adjacent magnet portions are the same.

Furthermore, a groove is formed in the peripheral surface of the magnetic part;

the groove is annular and is arranged on the peripheral surface of the magnetic part in a surrounding manner;

or, the peripheral surface of the magnetic part comprises a plurality of side surfaces, and at least one side surface is provided with the groove.

Further, the thickness of no magnetism portion is more than 0.3 mm.

In a second aspect, the invention provides a vibration device comprising a magnetic member as described in any one of the above.

In a third aspect, the present invention provides a magnetizing apparatus, including:

the tool is used for placing a to-be-magnetized piece, and comprises at least one magnetic conductive sleeve, the to-be-magnetized piece is arranged in the magnetic conductive sleeve, and the to-be-magnetized piece comprises a first part covered by the magnetic conductive sleeve and a second part separated by the first part; and (c) a second step of,

the magnetic field generating devices are arranged on the outer side of the outer peripheral surface of the second part and used for generating a magnetic field so as to magnetize the second part.

Further, the magnetic field generating device comprises a magnetizing coil, and the magnetizing coil generates the magnetic field after being electrified.

Further, the axis of the magnetizing coil is parallel to the axis of the piece to be magnetized.

Further, the magnetic field generating device comprises a plurality of magnetizing coils;

the plurality of magnetizing coils are positioned on two sides of the piece to be magnetized; alternatively, the first and second electrodes may be,

and the magnetizing coils are arranged around the periphery of the piece to be magnetized.

Further, the frock still include with the connecting piece that the flux sleeve links to each other, the connecting piece is located the second portion is outside.

Furthermore, the connecting piece is annular and is matched with the magnetic sleeve to form a mounting hole, and the piece to be magnetized is arranged in the mounting hole.

Furthermore, the polarity directions of the magnetic fields generated by the magnetizing coils of the magnetic field generating devices are the same, and the polarity directions of the magnetic fields generated by the magnetizing coils of two adjacent magnetic field generating devices are opposite.

In a fourth aspect, the invention provides an integrated magnetizing method, which includes the following steps:

s1, providing a magnetic sleeve and a magnetic field generating device;

s2, a to-be-magnetized piece is arranged in the magnetic conduction sleeve in a penetrating mode, and the magnetic field generating device is located on the outer side of the outer peripheral face of the second portion;

s3, adjusting the relative positions of the magnetic field generating device and the to-be-magnetized piece, wherein the to-be-magnetized piece comprises a first part covered by the magnetic sleeve and a second part separated by the first part;

and S4, generating a magnetic field through the magnetic field generating device, and magnetizing the second part of the piece to be magnetized.

Further, the integrated magnetizing method further comprises the following steps:

s5, measuring the parameter value of the part to be magnetized after magnetization;

s6, judging whether the measured parameter value is within an allowable error range, if not, firstly adjusting the magnetizing parameter of the magnetic field generating device according to the measured parameter value, then generating a magnetic field through the magnetic field generating device, and magnetizing the second part of the piece to be magnetized;

and S7, repeating the step S5 and the step S6 until the measured parameter value is in an allowable error range.

Further, the magnetic fields generated by two adjacent magnetic field generating devices have opposite polarity directions.

Further, the magnetic field generating device comprises at least one magnetizing coil, and the magnetizing coil is electrified to generate a magnetic field.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the magnetic part comprises the magnetic part and the non-magnetic part, the magnetic part is an integrated part, the size precision of the magnetic part can be ensured through a processing technology, compared with a mode of connecting through a plurality of magnets, the size precision of the magnetic part is higher, and when the magnetic part is assembled with other parts, higher assembly precision can be obtained, so that the integral operation performance is improved.

Drawings

Fig. 1 is a schematic structural view of a magnetic member according to an embodiment of the present invention.

Fig. 2 is a schematic view of the magnetic member of fig. 1 fitted in the coil.

Fig. 3 is a schematic structural diagram of a magnetic component according to an embodiment of the present invention, wherein the magnetic component has two nonmagnetic parts.

Fig. 4 is a schematic structural view of a magnetic member according to an embodiment of the present invention, in which two ends of the magnetic member have rectangular cross sections and the middle has a circular cross section.

Fig. 5 is a schematic structural diagram of a magnetic member according to an embodiment of the present invention, in which a magnet portion and a non-magnet portion of the magnetic member are not symmetrical with respect to a first plane of symmetry.

Fig. 6 is a schematic structural view of a magnetic member according to an embodiment of the present invention, in which the magnetic member has a circular groove.

Fig. 7 is a schematic structural view of a magnetic member according to an embodiment of the present invention, in which the magnetic member is a rectangular parallelepiped as a whole.

Fig. 8 is a schematic structural view of a magnetic member according to an embodiment of the present invention, in which a groove of the magnetic member is formed on a non-magnetic portion.

Fig. 9 is a schematic structural diagram of a magnetic member according to an embodiment of the present invention, in which a groove of the magnetic member is formed in a magnet portion.

Fig. 10 is a schematic structural diagram of a bone conduction sound-generating device according to an embodiment of the present invention.

Fig. 11 is a schematic view of the magnetic member shown in fig. 3 fitted in a coil.

Fig. 12 is a schematic structural view of a magnetizing apparatus according to an embodiment of the present invention.

FIG. 13 is a schematic view of the block to be magnetized in the tool according to the present invention.

Fig. 14 is a schematic structural diagram of the flux sleeve of the present invention.

FIG. 15 is a schematic view of an embodiment of the present invention in which magnetizing coils are disposed on both sides of a block to be magnetized.

Fig. 16 is a schematic diagram of another embodiment of the present invention when magnetizing coils are provided on both sides of a block to be magnetized.

Fig. 17 is a schematic diagram of the block to be magnetized according to the present invention, wherein a plurality of magnetizing coils are arranged around the outside of the block.

Fig. 18 is a schematic view of a magnetic member formed by magnetizing the magnetizer shown in fig. 12.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures associated with the present application are shown in the drawings, not all of them. 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 application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

As shown in fig. 1, a magnetic member 1 corresponding to a preferred embodiment of the present invention is made of a magnetic material, such as ferrite, neodymium iron boron, alnico, and samarium cobalt, etc., and the magnetic member 1 is capable of generating a magnetic field for attracting, for example, ferromagnetic substances after being magnetized.

The magnetic member 1 has two end surfaces 15 and an outer peripheral surface connected between the end surfaces 15, and the magnetic member 1 further has an axis 16 passing through geometric centers of the two end surfaces 15, the axis being perpendicular to the two end surfaces 15.

The magnetic part 1 comprises at least two magnet parts 10 and a non-magnetic part 11 positioned between the two adjacent magnet parts 10, the non-magnetic part 11 is directly connected with the magnet parts 10, and the two adjacent magnet parts 10 are separated by the non-magnetic part 11. It will be appreciated that the magnet portion 10 and the non-magnetic portion 11 are part of the magnetic member 1 and not separate components. Each magnet portion 10 includes two magnetic poles, an N pole and an S pole, respectively, and the two magnetic poles are arranged along the axis of the magnetic member 1.

As a preferred embodiment, the polarities of the two magnetic poles oppositely disposed (or adjacent) adjacent to the two magnet portions 10 are the same, so that, referring to fig. 2, when it is fitted into the coil 20 of the vibration device such as a bone conduction sound-generating device or a linear vibration motor, magnetic lines of force can be concentrated to approximately vertically pass through the coil 20, and after the coil 20 is energized, a larger driving force can be generated, thereby improving the driving force, sensitivity and vibration amount of the vibration device. The plurality of magnet portions 10 are arranged along the axis 16 of the magnetic member 1, and the non-magnetic portion 11 separates two adjacent magnet portions 10, that is, the magnetic poles of the magnet portions 10 and the non-magnetic portions 11 are arranged along the axis 16 of the magnetic member 1.

The magnetic member 1 shown in fig. 1 and 2 includes one nonmagnetic portion 11 and two magnet portions 10, but the number thereof is not limited thereto, and for example, as shown in fig. 3, the magnetic member 1 shown in fig. 3 has two nonmagnetic portions 11 and three magnet portions 10, and so on for the case where there are more nonmagnetic portions 11. In the case where there are a plurality of nonmagnetic parts 11, the thicknesses of the plurality of nonmagnetic parts 11 may be the same or different. In a preferred embodiment, the thickness of the non-magnetic part 11 is more than 0.3mm, and the maximum value is less than the minimum value of the thickness of any one of the magnet parts 10, if the thickness of the non-magnetic part 11 is too small, the boundary between the magnet part 10 and the non-magnetic part 11 is not clear, and the performance of the magnetic member 1 is affected, and if the thickness of the non-magnetic part 11 is too large, the magnet part 10 is correspondingly small, and the magnetic flux and the value B are affected.

The cross-sectional shape of the magnetic member 1 is not limited (referring to a cross-section perpendicular to the axis 16), and for example, the cross-sectional shape may be a circle, an ellipse, a triangle, a rectangle, or other polygons, and parameters such as the cross-sectional shape and the size of the cross-sectional shape of the magnetic member 1 at different positions may be the same or different, as shown in fig. 4, in which the cross-sectional shape of both ends of the magnetic member 1 shown in fig. 4 is a rectangle, and the middle portion is a circle. In a preferred embodiment, the parameters of the cross-sectional shape and the size of the cross-sectional shape of the magnetic member 1 at different positions are consistent, so that the magnetic member has a more flat surface. In this way, the transition between each magnet portion 10 and the non-magnet portion 11 of the magnetic member 1 is smooth, so that the surface magnetic field of the magnetic member 1 forms a relatively complete sine wave state distribution.

In addition, the magnetic part 10 and the non-magnetic part 11 formed on the magnetic member 1 may be symmetrical or asymmetrical with respect to a first symmetrical surface 12 of the magnetic member 1, the first symmetrical surface 12 being perpendicular to an axis 16 of the magnetic member 1, as shown in fig. 5 in a case of asymmetry.

Obviously, because the magnetic member 1 is a single magnetized component, the dimensional accuracy thereof can be ensured by the processing accuracy, and compared with the mode of connecting a plurality of magnets, the magnetic member has higher dimensional accuracy, thereby further improving the assembly accuracy of the magnetic member 1 and other components. For example, when the magnetic part is installed in the coil 20 of the vibration device, the assembly precision of the magnetic part and the coil 20 is higher, so that the magnetic part 1 is not easy to contact and collide with the coil 20 when vibrating, the reliability and the stability of operation are ensured, and the magnetic circuit loss caused by assembly errors can be avoided.

In addition, when a plurality of magnets are connected, the magnets are connected into a mode that the homopolar poles of the two magnets are close to each other, due to the existence of repulsive force, the connection difficulty is very high, the size precision of the connected magnets is further reduced, the magnetic part 1 is manufactured in a magnetizing mode, the processing is more convenient, the accessory cost and the labor cost in the assembling process can be reduced, and the production efficiency is improved.

As a preferred embodiment, the magnetic member 1 has a groove 13 formed on its outer circumferential surface. For the outer circumferential surface of the magnetic member 1 having a circular cross section (i.e., cylindrical), referring to fig. 6, the groove 13 thereof may be provided as an annular groove around the outer circumferential surface of the magnetic member 1, the axis of the annular groove coinciding with the axis 16 of the magnetic member 1; in the case of the outer peripheral surface of the magnetic member 1 having a polygonal cross section (for example, the polygonal-prism-shaped magnetic member 1), as shown in fig. 7 and 8, the outer peripheral surface includes a plurality of end-to-end side surfaces 14, in which case, the groove 13 may be disposed on one or more side surfaces 14, preferably, the center line 130 of the groove 13 is perpendicular to the axis 16 of the magnetic member 1, and both ends of the groove extend to two side surfaces 14 adjacent to the side surface 14. When the grooves 13 are formed on all the side surfaces 14 and the opening heights of the grooves 13 are the same, the grooves 13 form an annular groove around the outer peripheral surface of the magnetic member 1.

The position of the groove 13 is not limited, and for example, it may be opened only on the outer peripheral surface of the nonmagnetic part 11 without covering the magnet part 10; or only arranged on the peripheral surface of the magnet part 10 and not covered on the non-magnetic part 11; and also or simultaneously covers the magnet portion 10 and the non-magnetic portion 11. In addition, one or more of the above-mentioned slotting cases can be simultaneously provided on one magnetic element 1. In a possible case, as shown in fig. 8, the center line 130 of the groove 13 is located on a second symmetrical plane of the nonmagnetic part 11 (the nonmagnetic part 11 is symmetrical in the thickness D direction thereof with the second symmetrical plane), the second symmetrical plane is perpendicular to the axis 16 of the magnetic member 1, and the width B1 of the groove 13 is preferably equal to or greater than the thickness D of the nonmagnetic part 11. In another possible case, as shown in fig. 9, the center line 130 of the groove 13 is located on the magnet portion 10, and both ends thereof are overlaid onto the adjacent two nonmagnetic portions 11.

When the magnetic member 1 is matched with the matching hole of the coil or the shell, a layer of lubricating oil can be sprayed on the outer peripheral surface of the magnetic member 1, so that the magnetic member 1 and the matching hole are separated by the lubricating oil, and the movement is smoother. Because the groove 13 is arranged on the outer peripheral surface of the magnetic member 1, lubricating oil can be better stored in the groove 13, and the friction damping between the lubricating oil on the surface of the magnetic member 1 and the wall of the hole of the matching hole can be changed. Further, the damping received by the magnetic element 1 during vibration can be adjusted by changing the area of the groove 13, which facilitates adjustment of the vibration performance of the magnetic element 1.

The invention also provides a vibration device which comprises the magnetic part 1, and the vibration device can be a linear vibration motor or a bone conduction sound production device and the like.

Taking the bone conduction sound generating device as an example, as shown in fig. 10, the bone conduction sound generating device further includes a housing 2, a coil 20 disposed in the housing 2, and a spring plate 21 connected between the magnetic member 1 and the housing 2, wherein the magnetic member 1 is coupled in the coil 20, and can vibrate back and forth under the driving force of the magnetic field generated by the coil 20 after the coil 20 is energized. The two ends of the magnetic part 1 are both connected with elastic pieces 21, and the elastic pieces 21 are used for generating force for driving the magnetic part 1 to reset after the magnetic part 1 leaves the central position.

As described above, the magnetic member 1 manufactured by magnetizing has better dimensional accuracy, and therefore, the assembly accuracy with the coil 20 is higher, and the gap between the magnetic member 1 and the inner wall of the coil 20 can be smaller, for example, the gap between the inner wall of the coil 20 and the outer wall of the magnetic member 1 is set to 0.05-0.6 mm, and generally, the smaller the gap between the coil 20 and the magnetic member 1, the larger the driving force of the coil 20 to the magnetic member 1, the greater the sensitivity of the bone conduction sound generating device, and the smaller the gap, the easier the magnetic member 1 collides with the coil 20 during the movement. Therefore, it is further preferable that the gap is set to 0.15 to 0.3mm to ensure that the coil 20 has a sufficient driving force for the magnetic member 1 while ensuring a low risk of collision between the magnetic member 1 and the coil 20.

The position of the coil 20 corresponds to the non-magnetic part 11, that is, the coil 20 is arranged around the periphery of the non-magnetic part 11. The number of the coils 20 is not limited to one, and specifically, the number of the coils is the same as or less than that of the nonmagnetic parts 11, as shown in fig. 11, the magnetic member 1 shown in fig. 11 includes three magnet parts 10 and two nonmagnetic parts 11, and accordingly, the number of the coils 20 is also two, and the coils are correspondingly disposed on the peripheries of the two nonmagnetic parts 11. The height H of the coil 20 may be the same as the thickness D of the nonmagnetic portion 11, or may be larger than the thickness D of the nonmagnetic portion 11. Preferably, the height H of the coil 20 is greater than the thickness D of the non-magnetic part 11, so that the magnetic lines of force derived from the non-magnetic part 11 can pass through the coil 20 to generate the maximum possible lorentz force for driving, so that the response of the magnetic element 1 is more sensitive, and preferably, the coil 20 is symmetrically arranged on the non-magnetic part 11, and is symmetrical to the second plane of symmetry of the non-magnetic part 11, and covers the same width B of the two magnetic parts 10, so that the symmetry is better.

The invention also provides a magnetizer which is used for magnetizing the to-be-magnetized piece 1a to form the magnetic piece 1, for convenience of description, the to-be-magnetized piece 1 is called as the to-be-magnetized piece 1a, the to-be-magnetized piece 1a becomes the magnetic piece 1 after being magnetized, and the to-be-magnetized piece 1 can be a nonmagnetic blank or can be the magnetic piece 1 which needs to be magnetized again after magnetism is weakened. As shown in fig. 12 and 13, the magnetizing apparatus includes a fixture for placing a to-be-magnetized member 1a during magnetizing, a plurality of magnetic field generating devices arranged along an axis 16 of the to-be-magnetized member 1a, and a power supply controller electrically connected to the magnetic field generating devices.

The magnetic field generating device is used for generating a magnetic field so that the magnetic material placed in the magnetic field can be magnetized. As a preferred embodiment, the magnetic field generating means comprises at least one magnetizing coil 30, the axis of the magnetizing coil 30 being arranged parallel to the axis 16 of the magnetic member 1. The magnetizing coil 30 is capable of generating a magnetic field when energized, thereby magnetizing a magnetic material located in the magnetic field. The power supply controller is electrically connected with the magnetic field generating device, can supply power to the magnetic field generating device, and can also control parameters such as current and voltage introduced into the magnetic field generating device, so that the magnetic field generating device generates a magnetic field with required strength. The magnetizing method is not limited, and for example, the magnetizing may be constant current magnetizing or pulse magnetizing.

The fixture comprises a magnetic conductive sleeve 31, wherein the magnetic conductive sleeve 31 is made of a magnetic conductive material, such as an alloy formed by various iron products and rare earth elements, and the like.

The shape of the inner hole of the magnetic conductive sleeve 31 is consistent with that of the to-be-magnetized piece 1a, the to-be-magnetized piece 1a is arranged in the tool and then penetrates through the magnetic conductive sleeve 31, the magnetic conductive sleeve 31 covers the outside of the to-be-magnetized piece 1a, and the magnetic conductive sleeve 31 can be attached to the surface of the to-be-magnetized piece 1a or has a certain gap. The part to be magnetized 1a comprises a first portion covered by the flux sleeve 31 and at least two second portions separated by the first portion, the second portions not being covered by the flux sleeve 31.

The flux sleeve 31 is disposed between the magnetizing coil 30 and the to-be-magnetized member 1a, and is used for guiding out and guiding away magnetic lines of force of a magnetic field generated by the magnetizing coil 30, so as to generate an electromagnetic shielding effect, so that a first portion of the to-be-magnetized member 1a corresponding to the position of the flux sleeve 31 is prevented from being penetrated by the magnetic lines of force, and is further prevented from being magnetized, or is subjected to only a small magnetization effect, obviously, after the magnetization, the first portion of the to-be-magnetized member 1a corresponding to the position of the flux sleeve 31 forms the above-mentioned non-magnetic portion 11, and a second portion of the to-be-magnetized member 1a can be magnetized by the magnetic lines of force penetrating through the portion of material, so that the portion of material is magnetized, and forms the above-mentioned magnetic portion 10, referring to fig. 18, which shows the magnetic member 1 formed after the magnetization by the magnetizer shown in fig. 12.

It can be understood that the number of the flux sleeves 31 is determined according to the number of the non-magnetic portions 11 to be formed, and when the magnetic material is magnetized, the flux sleeves 31 are sleeved at the positions corresponding to the non-magnetic portions 11 to be formed, so that the non-magnetic portions 11 can be formed at the required positions after the magnetic material is magnetized.

As a preferred embodiment, the thickness D1 of the flux sleeve 31 is equal to or less than the thickness D of the corresponding nonmagnetic portion 11 because a certain transition region is generated between the magnet portion 10 and the nonmagnetic portion 11, and the magnetic field strength of the transition region is weak, so that the thickness D of the nonmagnetic portion 11 actually formed is greater than the thickness D1 of the flux sleeve 31, and the thickness D1 of the flux sleeve 31 is set to be equal to or less than the thickness of the corresponding nonmagnetic portion 11, thereby ensuring the dimensional accuracy of the thickness D of the formed nonmagnetic portion 11 as much as possible. Further preferably, the thickness D1 of the flux sleeve 31 is smaller than the thickness D of the corresponding non-magnetic portion 11, so that the size of the non-magnetic portion 11 is formed closer to the design value. In practice, the thickness D1 of the flux sleeve 31 may be set according to a deviation value between the thicknesses of the flux sleeve 31 and the non-magnetic portion 11, which is actually measured.

In a preferred embodiment, the flux sleeve 31 is a single annular part, for example it is a single round or square tubular part; in another preferred embodiment, the flux sleeve 31 is formed by splicing a plurality of components, for example, it may include a plurality of flux plates 310, and the plurality of flux plates 310 are connected to form the shape of the flux sleeve 31, and referring to fig. 14, fig. 14 shows a case where the cross section of the flux sleeve 31 is rectangular, and it is formed by splicing four flux plates 31.

The magnetic field generating devices correspond to the positions of the second portions of the member to be magnetized 1a, and when there are a plurality of magnet portions 10, the number of the second portions to be magnetized is also a plurality, and at this time, the number of the magnetic field generating devices is also a plurality. And magnetic field generating devices are correspondingly arranged on the outer sides of the second parts to be magnetized. Preferably, the axis of the magnetizing coil 30 is parallel to the axis 16 of the member to be magnetized 1a, so that the magnetic lines of force generated by the magnetizing coil 30 can pass through the second portion substantially along the direction of the axis 16, thereby magnetizing the member to be magnetized 1a more efficiently.

Further, in the case that the magnetic field generating device includes a plurality of magnetizing coils 30, the polarity directions of the magnetic fields generated by the plurality of magnetizing coils 30 are the same, so that the magnetic lines of force generated by the plurality of magnetizing coils 30 can penetrate from one side of the second portion to the other side of the second portion along the same direction, and the plurality of magnetizing coils 30 can make the magnetizing density of the second portion more uniform, make the magnetizing saturation better, and make the magnetized magnet portion 11 have stronger magnetism.

It is apparent that the polarity of the magnet portion 10 is opposite to the polarity of the magnetic field generated when the magnetizing coil 30 is magnetized. Thus, the magnetic field direction generated by the magnetizing coil 30 in each magnetic field generating device during magnetizing can be controlled to control the polarity of the corresponding magnet portion 11. When the directions of the magnetic fields generated by the magnetizing coils 30 of two adjacent magnetic field generating devices are opposite, the polarities of two adjacent magnetic poles of two adjacent magnet parts 10 on the magnetic member 1 are the same. The direction of the magnetic field generated by the magnetizing coil 30 can be controlled by the winding direction of the coil or the flow direction of the current.

In a preferred embodiment, as shown in fig. 15 and 16, the magnetizing coils 30 of the magnetic field generating device are arranged on both sides of the member to be magnetized 1a, such as the upper and lower sides or the left and right sides, and the number of the magnetizing coils 30 on each side may be one or two or more; in another embodiment, as shown in fig. 17, the magnetizing coils 30 of the magnetic field generating device are arranged around the periphery of the to-be-magnetized member 1a, the number of the magnetizing coils is three or more (6 in the figure), and preferably, the plurality of magnetizing coils 30 have the same size and have the same distance from the axis 16 of the to-be-magnetized member 1a, so as to generate a more uniform magnetic field for magnetizing.

Further, as shown in fig. 12 and 13, the magnetizer further includes a connecting member 32 connected to the flux sleeve 31, and the connecting member 32 is used for connecting the flux sleeve 31, so that the to-be-magnetized piece 1a can be better limited in the tool, and the connecting manner between the to-be-magnetized piece 1a and the to-be-magnetized piece is not limited, for example, the to-be-magnetized piece can be connected in an adhesive manner. The connecting member 32 is made of non-magnetic material, such as plastic, silicone, polyurethane, etc., preferably, the connecting member 32 is made of polyurethane, which has the advantages of easy processing and low cost.

The connecting member 32 is preferably annular in shape, and may be a single component or may be formed by connecting a plurality of connecting plates. Preferably, the connecting member 32 has the same shape as the flux sleeve 31, and is matched with the flux sleeve 31 to form the mounting hole 34, and when magnetizing, the to-be-magnetized member 1a is disposed in the mounting hole 34, so that the to-be-magnetized member 1a is more conveniently mounted, and the magnetic conduction effect of the flux sleeve 31 is better.

It is further preferable that the connecting members 32 at both ends extend beyond the outer end of the magnet portion 10, and the end of the connecting member 32 is connected with a magnetic conductive block 33 for sealing the mounting hole 34, so as to improve the magnetizing effect.

As a preferred embodiment, the magnetizer further comprises a position adjusting mechanism for adjusting the relative position of the magnetic field generating device and the member to be magnetized 1a, which may be manual, automatic or semi-automatic. Preferably, the position adjustment mechanism is automatic or semi-automatic and is connected with the magnetic field generation device, and the relative position of the magnetic field generation device and the piece to be magnetized 1a is adjusted by moving the magnetic field generation device. The position adjusting structure can at least drive the magnetic field generating device to move along the axis 16 of the to-be-magnetized piece 1a, and for example, the magnetic field generating device can be driven to move by a mechanism such as an electric cylinder, an air cylinder, an electric push rod, a servo module or a gear rack; preferably, the position adjusting mechanism can also drive the magnetic field generating device to be close to or far away from the piece to be magnetized 1a along the radial direction; further preferably, the position adjusting mechanism can also drive the magnetic field generating device to rotate around the axis 16 of the member to be magnetized 1a so as to adjust the angle. In this way, when magnetizing, parameters such as the positions and the sizes of the nonmagnetic part 11 and the magnet part 10 formed after magnetizing can be adjusted by changing the position of the magnetic field generating device.

Obviously, through foretell magnetizer, it is spacing in the frock only to need to treat the block 1a that magnetizes, then to magnetic field generating device circular telegram can treat the block 1a that magnetizes, and then convenient acquisition magnetic part 1, it is very convenient to use.

The invention also provides an integrated magnetizing method for forming the magnetic piece 1 by magnetizing the piece to be magnetized 1a, wherein the integrated magnetizing method comprises the following steps:

s1, providing a magnetizer, wherein the magnetizer comprises a magnetic sleeve 31 and a magnetic field generating device;

s2, a to-be-magnetized piece 1a is arranged in the magnetic conduction sleeve 31 in a penetrating mode, and the magnetic field generating device is located on the outer side of the outer peripheral face of the second portion;

s3, adjusting the relative positions of the magnetic field generating device and the to-be-magnetized piece 1a, wherein the to-be-magnetized piece 1a comprises a first part covered by the magnetic sleeve 31 and a second part separated by the first part;

and S4, generating a magnetic field through the magnetic field generating device, and magnetizing the second part of the piece to be magnetized 1 a.

It can be understood that the first portion corresponds to the position where the non-magnetic portion 11 needs to be formed, and the second portion corresponds to the position where the magnetic portion 10 needs to be formed, when the magnetic field generating device magnetizes the second portion, the second portion forms the magnetic portion 10, and the first portion is not magnetized due to the shielding of the magnetic conductive sleeve 31, so that the non-magnetic portion 11 is formed.

As a preferred embodiment, the magnetizing apparatus in step S1 is the magnetizing apparatus described above, and the integrated magnetizing method of the present invention is implemented by the magnetizing apparatus described above.

In step S1, the flux sleeve 31 having a thickness corresponding to the thickness of the nonmagnetic portion 11 to be formed is selected. The magnetic field generating device comprises at least one magnetizing coil 30, and the magnetizing coil 30 is electrified to generate a magnetic field, and the polarity direction of the magnetic field can be determined and changed through the winding direction of the magnetizing coil 30 or the direction of current. As a preferred embodiment, the polarities of the magnetic fields generated by two adjacent magnetic field generating devices are opposite, so that the polarities of the two adjacent magnetic parts 10 are also opposite, and the polarities of the two opposite magnetic poles of the two adjacent magnetic parts 10 are the same, and by means of the oppositely charged manner of the magnetic fields generated by the two magnetic field generating devices, the non-magnetic area 11 can be reliably generated, and the stability of the generated non-magnetic area 11 is ensured.

In the step S2, the position of the flux sleeve 31 needs to be adjusted to correspond to the position of the portion of the to-be-magnetized member 1a where the non-magnetic portion 11 needs to be formed.

In the step S3, the relative position of the magnetic field generating device and the to-be-magnetized member 1a may be, for example, the position of the magnetic field generating device along the axis of the to-be-magnetized member 1a and/or the radial distance from the to-be-magnetized member 1 a. The relative position may be preset based on empirical or theoretical calculations.

In the step S4, a magnetic field is generated by the magnetic field generating device according to a preset magnetizing parameter, for example, the magnetizing parameter may be a parameter such as current and/or voltage, which may be preset according to an empirical value or a theoretical calculation value.

In order to make the magnetized magnet part 10 and the non-magnetic part 11 have higher dimensional accuracy and improve the quality of the magnetized magnetic member 1, the magnetic member 1a may be magnetized twice or more times. Specifically, the integrated magnetizing method further comprises the following steps:

s5, measuring the parameter value of the piece to be magnetized 1a;

s6, judging whether the measured parameter value is within an allowable error range, if not, firstly adjusting the magnetizing parameter of the magnetic field generating device according to the measured parameter value, then generating a magnetic field through the magnetic field generating device, and magnetizing the second part of the piece to be magnetized 1a;

and S7, repeating the step S5 and the step S6 until the measured parameter value is within an allowable error range.

Obviously, when the measured parameter value is within the allowable error range, the magnetization is completed.

In step S5, the to-be-magnetized piece 1a may be taken out first and then measured, so that the measurement is more convenient. The parameter values may be, for example, the magnitude of surface magnetism of each region of the magnetic material 1 formed after the magnetization of the material 1a to be magnetized, and the dimensional parameters such as the positions and thicknesses of the magnet portion 10 and the non-magnetic portion 11. Preferably, the magnitude of the meter magnetism is tested by a programmable meter magnetism tester; dimensional parameters such as the width and relative position of the magnet portion 10, the nonmagnetic region 11, and the like were tested by touching the magnetic liquid in conjunction with the image projector.

In step S6, the magnetizing parameter may be, for example, a relative position of the magnetic field generating device along the axis 16 of the to-be-magnetized member 1a, a radial distance between the magnetic field generating device and the to-be-magnetized member 1a, and a current and a voltage applied to the magnetic field generating device during magnetizing. The magnetizing parameters can be correspondingly adjusted according to the measured parameter values, so that the formed magnetic part 1 has better quality, for example, if the measured surface magnetism value is too small, the magnetizing parameters such as current and/or voltage of the magnetic field generating device can be improved, so that larger surface magnetism can be obtained when magnetizing again; if the measured non-magnetic part 11 is too thick, the positions of the two magnetic field generating devices on the two sides of the non-magnetic part 11 can be adjusted to make the two magnetic field generating devices approach each other, and the magnetic sleeve 31 with smaller thickness can be replaced according to the situation, so that the thickness of the non-magnetic part 11 becomes smaller after being magnetized again.

By the integrated magnetizing method, the magnetic part 1 can be conveniently manufactured, the size precision of the magnet part 10 and the non-magnetic part 11 of the obtained magnetic part 1 is high, and the magnetic field intensity can be reliably ensured.

The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered to be within the scope of the present invention.

Claims

1. A magnetizing apparatus, comprising:

the tool is used for placing a to-be-magnetized piece (1 a), the to-be-magnetized piece (1 a) is an integrated part, the tool comprises at least one magnetic conductive sleeve (31), the to-be-magnetized piece (1 a) is arranged in the magnetic conductive sleeve (31), and the to-be-magnetized piece (1 a) comprises a first part covered by the magnetic conductive sleeve (31) and a second part separated by the first part; and (c) a second step of,

the magnetic field generating devices are correspondingly arranged on the outer sides of the outer peripheral surfaces of the second parts and are used for generating magnetic fields so as to magnetize the second parts; the magnetic field generating device comprises a magnetizing coil (30), the magnetizing coil (30) generates the magnetic field after being electrified, and the to-be-magnetized piece (1 a) is positioned on the outer side of the magnetizing coil (30);

the magnetic fields generated by two adjacent magnetic field generating devices have opposite polarity directions, and after the magnetic fields are charged, the polarities of two adjacent magnetic poles of two adjacent second parts are the same.

2. A charger as claimed in claim 1, characterized in that the axis of said coil (30) is parallel to the axis of said piece to be charged (1 a).

3. A magnetizer according to claim 2, wherein the magnetic field generating means includes a plurality of magnetizing coils (30);

the plurality of magnetizing coils (30) are positioned at two sides of the piece to be magnetized (1 a); alternatively, the first and second electrodes may be,

the plurality of magnetizing coils (30) are arranged around the periphery of the to-be-magnetized piece (1 a).

4. A magnetiser according to any of claims 1 to 3, wherein the tooling further comprises a connector (32) connected to the flux sleeve (31), the connector (32) being located externally of the second portion.

5. A magnetizer according to claim 4, wherein the connecting piece (32) is ring-shaped and cooperates with the magnetic sleeve (31) to form a mounting hole (34), and the piece (1 a) to be magnetized is arranged in the mounting hole (34).

6. A magnetic charger as claimed in claim 4, characterized in that the polarity directions of the magnetic fields generated by the magnetizing coils (30) of the magnetic field generating devices are the same, and the polarity directions of the magnetic fields generated by the magnetizing coils (30) of two adjacent magnetic field generating devices are opposite.

7. An integrated magnetizing method is characterized by comprising the following steps:

s1, providing a magnetic sleeve (31) and a magnetic field generating device, wherein the magnetic field generating device comprises a magnetizing coil (30);

s2, a to-be-magnetized piece (1 a) penetrates through the magnetic conductive sleeve (31), the to-be-magnetized piece (1 a) is an integral part, the to-be-magnetized piece (1 a) comprises a first part covered by the magnetic conductive sleeve (31) and a second part separated by the first part, and the outer sides of the outer peripheral surfaces of the second part are correspondingly provided with the magnetic field generating devices;

s3, placing the to-be-magnetized piece (1 a) outside the magnetizing coil (30), and adjusting the relative positions of the magnetic field generating device and the to-be-magnetized piece (1 a);

and S4, energizing a magnetizing coil (30) of the magnetic field generating device to generate a magnetic field, magnetizing the second part of the piece to be magnetized (1 a), wherein the polarity directions of the magnetic fields generated by two adjacent magnetic field generating devices are opposite, and after magnetizing, the polarities of two adjacent magnetic poles of the two adjacent second parts are the same.

8. The integrated magnetizing method of claim 7, further comprising the steps of:

s5, measuring the parameter value of the to-be-magnetized piece (1 a) after magnetization;

s6, judging whether the measured parameter value is within an allowable error range, if not, firstly adjusting the magnetizing parameter of the magnetic field generating device according to the measured parameter value, then generating a magnetic field through the magnetic field generating device, and magnetizing the second part of the piece (1 a) to be magnetized;

9. A magnetic member, comprising:

at least two magnet portions (10), each of said magnet portions (10) comprising two magnetic poles; and the number of the first and second groups,

the non-magnetic part (11) is arranged between two adjacent magnet parts (10), the magnetic poles of the magnet parts (10) and the non-magnetic part (11) are arranged along the axis of the magnetic part, and the polarities of two adjacent magnetic poles of two adjacent magnet parts (10) are the same;

the magnetic part is an integrated part;

the magnetic part is prepared by adopting the magnetizer according to any one of claims 1 to 6 or the integrated magnetizing method according to claim 7 or 8.

10. The magnetic element according to claim 9, characterized in that the peripheral surface of the magnetic element (1) is provided with a groove (13);

the groove (13) is annular and is arranged on the outer peripheral surface of the magnetic part (1) in a surrounding manner;

alternatively, the outer circumferential surface of the magnetic member (1) comprises a plurality of side surfaces (14), at least one of the side surfaces (14) being provided with the groove (13).

11. The magnetic member according to claim 9 or 10, wherein the thickness of the non-magnetic portion (11) is 0.3mm or more.

12. A vibration device, characterized in that it comprises a magnetic element (1) according to any one of claims 9 to 11.