A method and device for fast multi-pole magnetization of micro magnets

Abstract

The present invention provides a method and device for rapid multi-pole magnetization of micro magnets, which relates to the field of magnetization technology and solves the technical problems in the prior art of small size of micro magnets, distinction between magnetization direction and non-magnetization direction, and inconvenience in handling. The method for rapid multi-pole magnetization of micro magnets includes weak magnetization of multiple micro magnets, where weak magnetization is unipolar magnetization, so that the magnetization direction of the micro magnets exhibits adsorption; stacking the micro magnets into a long magnet group; and performing multi-pole strong magnetization on each of the micro magnets in the long magnet group. The present invention arranges the weakly magnetized micro magnets into a long magnet group with a larger volume, making it easier to handle and able to straighten the magnetization direction of each micro magnet in the same direction. The magnetization direction and non-magnetization direction of the long magnet group have obvious positional distinctions, making it easier for the operator to distinguish and making subsequent multi-pole magnetization operations more convenient.

Description

Technical Field

[0001] The present invention relates to the field of magnetization technology, in particular to a method and device for fast multi-pole magnetization of a micro magnet. Background Art

[0002] During the forming process of the blank stage, the magnet's magnetization direction and non-magnetization direction have been fixed. Only by accurately distinguishing the magnet's magnetization direction and applying current in the magnetization direction can the magnet obtain the maximum magnetic field strength.

[0003] As consumer electronics develop towards being lighter and thinner, the requirements for magnets are also developing towards miniaturization, and magnets need to become smaller and thinner. As the size of magnets becomes smaller and smaller, the magnetization direction and non-magnetization direction of the magnets become closer and closer, which makes it impossible to identify the magnetization direction through common vibration plate screening and limit differentiation methods, and thus makes it impossible to ensure that the magnetization direction of the magnet is the same as the magnetization current direction. This will cause the magnet to be unable to be magnetized and saturated, and it is impossible to ensure that the magnet obtains the maximum magnetic field strength, resulting in magnet function defects. The main application scenario of magnets in consumer electronics is to form mutual attraction through the interaction between the north and south poles of the magnets based on the principle of opposites attracting each other. Under the premise of the same size, multi-pole magnetization (refer to Figure 2 ) Compared with conventional single-pole magnetization (refer to Figure 1 ), resulting in a more uniform magnetic field and a greater suction force than conventional single-pole magnetization. Therefore, to achieve both a small magnet size and maximum suction force, multi-pole magnetization is the first option considered. However, due to the small size of the magnet, there are also challenges such as the inability to quickly distinguish the magnetization direction and the difficulty in handling the magnet.

[0004] The multi-pole magnetization method of the magnet is to place the magnet in a positioning fixture, and through different inlay methods of the coils in the magnetizing pole head, currents in different directions are generated, thereby forming a planar multi-pole magnetization of the magnet.

[0005] At present, for the multi-pole magnetization method of magnets, it is first necessary to customize special magnetization equipment and positioning tooling. Among them, the positioning tooling needs to be slotted, and the slot position needs to correspond to the coil position of the magnetizing pole head. Then the magnet is placed in the slot of the positioning tooling. This process requires the magnetization direction of the magnet to be the same as the direction of the coil. Finally, the magnet is magnetized by the magnetic field formed by the instantaneous pulse current in the magnetization equipment.

[0006] The above magnetization process is a general process of the multi-pole magnetization method. For magnets whose non-magnetized direction and magnetized direction can be clearly distinguished, the distinction and control can be carried out through the slots of the positioning tooling or the vibration plate screening or limiting method. However, for tiny magnets, especially magnets whose magnetized direction and non-magnetized direction are close to the same, the applicability of the above process is greatly reduced.

[0007] At present, the multi-stage magnetization method of magnets is mainly to manually find the magnetization direction, place the magnet in the slot of the positioning tool, and then perform multi-pole magnetization. However, for micro magnets, since the dimensions of the magnetization direction and the non-magnetization direction tend to be consistent, the human eye can no longer accurately identify the magnetization direction of the magnet. As a result, the multi-pole magnetization operation may be performed without accurately identifying the magnetization direction and the non-magnetization direction, causing functional defects of the magnet.

[0008] When placing micro magnets in the slots of the positioning fixture, due to their small size, they are difficult to pick up whether they are picked up manually or by a robot, resulting in low efficiency. In addition, since the magnetized and non-magnetized directions of the micro magnets are of similar size, the magnetized direction cannot be identified through vibration plate screening and limit differentiation, and cannot be accurately distinguished by the naked eye, which greatly reduces the placement efficiency and accuracy.

[0009] Therefore, how to solve the technical problems of small size, distinction between magnetization direction and non-magnetization direction, and inconvenience in handling of micro magnets in the prior art has become an important technical problem that needs to be solved by people in this field. Summary of the Invention

[0010] The present invention aims to provide a method and apparatus for rapid multi-pole magnetization of micro-magnets, addressing the existing technical issues of small size, distinguishable magnetization and non-magnetization directions, and inconvenient handling of micro-magnets. The various technical effects achieved by the preferred solution among the various technical solutions provided by the present invention are detailed below.

[0011] To achieve the above objectives, the present invention provides the following technical solutions:

[0012] The present invention provides a micro-magnet fast multi-pole magnetization method, comprising:

[0013] performing weak magnetization on the plurality of micro-magnets, wherein the weak magnetization is unipolar magnetization, so that the magnetization directions of the micro-magnets exhibit adsorption properties;

[0014] Stacking the micro magnets into long strip magnet groups;

[0015] Each of the micro magnets in the long magnet group is subjected to multi-pole strong magnetization.

[0016] Furthermore, the weak magnetization of the plurality of micro magnets comprises:

[0017] placing the non-magnetic micro magnet into a magnetizing box;

[0018] Adjust the magnetizing voltage to the working range of weak magnetizing voltage;

[0019] The magnetization box containing the micro magnet is placed into a weak magnetization coil for a weak magnetization process.

[0020] Furthermore, the micro-magnets are stacked and arranged into a long magnet group, and the magnetization directions of the micro-magnets are attracted to each other to form a long magnet group that is easy to pick up.

[0021] Furthermore, in the weak magnetization process, the working range of the weak magnetization voltage is 80V-120V.

[0022] Furthermore, the multi-pole strong magnetization of each of the micro magnets in the long magnet group includes:

[0023] Adjust the voltage of multi-pole magnetization;

[0024] Take the long magnet group and place each of the micro magnets in the long magnet group into the positioning tool respectively;

[0025] Performing a multi-pole strong magnetization operation on the combination of the positioning fixture and the micro magnet;

[0026] Wherein, the magnetization direction of the micro magnet is the same as the direction of the multi-pole magnetization coil in the multi-pole strong magnetization operation process.

[0027] Furthermore, the method of taking the long magnet group is manual taking or robotic hand taking.

[0028] The micro-magnet fast multi-pole magnetization device provided by the present invention comprises:

[0029] A first magnetizer is used to perform weak magnetization on a plurality of micro magnets, wherein the weak magnetization is unipolar magnetization, so that the magnetization direction of the micro magnets exhibits adsorption;

[0030] A strip arrangement mechanism for stacking the micro-magnets into a long strip magnet group;

[0031] The second magnetizer is used to perform multi-pole strong magnetization on each of the micro magnets in the long magnet group.

[0032] Furthermore, the strip sorting mechanism is a robot structure.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The micro-magnet rapid multi-pole magnetization method provided by the present invention first weakly magnetizes multiple micro-magnets so that the multiple micro-magnets exhibit adsorption in the magnetization direction, and then stacks and arranges the multiple micro-magnets into a larger long magnet group, so that the multiple micro-magnets are arranged along the magnetization direction, which is more convenient to take, and the magnetization directions of each micro-magnet can be straightened in the same direction. The magnetization direction and non-magnetization direction of the long magnet group have obvious positional differences, which are easier for operators to distinguish, and the multi-pole magnetization operation is more convenient. While quickly distinguishing the magnetization directions of the micro-magnets, the multi-pole magnetization efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is the magnetic field effect diagram of monopole magnetization;

[0037] Figure 2 This is a diagram of the magnetic field effect of multi-pole magnetization;

[0038] Figure 3 Schematic diagram of a method for rapid multi-pole magnetization of a micro-magnet provided by an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the process of rapid multi-pole magnetization of a micro magnet provided by an embodiment of the present invention.

[0040] In the figure, 1-first magnetizer; 2-second magnetizer; 3-magnetizing box; 4-weak magnetizing coil; 5-positioning tooling; 6-upper pole head of the first magnetizer; 7-lower pole head of the first magnetizer; 8-upper pole head of the second magnetizer; 9-lower pole head of the second magnetizer; 10-micro magnet; 11-long magnet group. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0042] The purpose of the present invention is to provide a method and device for rapid multi-pole magnetization of micro magnets, which solves the technical problems in the prior art of small size of micro magnets, distinction between magnetization direction and non-magnetization direction, and inconvenience in handling.

[0043] The following embodiments are described with reference to the accompanying drawings. The embodiments described below do not limit the invention as set forth in the claims. Furthermore, the entire contents of the configurations shown in the following embodiments are not necessarily required to serve as solutions to the invention as set forth in the claims.

[0044] The technical solution of the present invention is described in detail below with reference to specific embodiments.

[0045] Example 1:

[0046] Reference Figure 3-4 The micro-magnet fast multi-pole magnetization method provided in this embodiment includes:

[0047] Multiple micro magnets 10 are weakly magnetized, and weak magnetization is unipolar magnetization, so that the magnetization direction of the micro magnet 10 shows adsorption, that is, the micro magnet 10 has a magnetization direction and a non-magnetization direction, and the magnetization direction is an easy magnetization direction. After the micro magnet 10 is weakly magnetized, the micro magnet 10 is in a unipolar form, and the micro magnet 10 shows adsorption in the magnetization direction. The micro magnets 10 can adsorb each other in the magnetization direction, thereby accurately identifying the magnetization direction of the micro magnet 10, thereby avoiding the problem of incorrect identification of the magnetization direction of the micro magnet 10.

[0048] The micro magnets 10 are stacked and arranged into a long magnet group 11 , that is, the micro magnets 10 can be attracted to each other in the magnetization direction, and multiple micro magnets 10 can be attracted to each other and can be stacked and arranged to form a long magnet group 11 with a larger volume.

[0049] The multi-pole strong magnetization is performed on each micro magnet 10 in the long magnet group 11, that is, each micro magnet 10 is oriented and fixed, and the multi-pole strong magnetization operation is performed on each micro magnet 10. The long magnet group 11 is more convenient to pick up and operate, and the magnetization direction and non-magnetization direction of the long magnet group 11 are easier to distinguish. The magnetization directions of each micro magnet 10 in the long magnet group 11 are all in the same direction, and the orientation and fixation of each micro magnet 10 and the multi-pole magnetization operation are more convenient.

[0050] With such a configuration, the present invention first weakly magnetizes the plurality of micro magnets 10 so that the plurality of micro magnets 10 exhibit adsorption properties in the magnetization direction, and stacks and arranges the plurality of micro magnets 10 into a larger elongated magnet group 11, so that the plurality of micro magnets 10 are arranged along the magnetization direction, making it more convenient to take and straighten the magnetization directions of each micro magnet 10 in the same direction. The magnetization direction and the non-magnetization direction of the elongated magnet group 11 have obvious positional distinctions, making it easier for the operator to distinguish them. The subsequent multi-pole magnetization operation is more convenient, and the multi-pole magnetization efficiency can be improved while quickly distinguishing the magnetization directions of the micro magnets 10, thereby solving the technical problems in the prior art of small size of micro magnets, distinction between magnetization directions and non-magnetization directions, and inconvenience in taking.

[0051] As an optional implementation method of the embodiment of the present invention, weak magnetization of the plurality of micro magnets 10 includes:

[0052] The micro magnets 10 in a non-magnetic state are placed in a magnetizing box 3. The material of the magnetizing box 3 can be, but is not limited to, non-ferromagnetic materials, or insulating materials such as plastic or rubber. The magnetizing box 3 serves to store and limit the multiple micro magnets 10. The magnetizing box 3 is a supporting carrier for the micro magnets 10 during the magnetization process.

[0053] The magnetizing voltage is adjusted to the working range of the weak magnetizing voltage, that is, the first magnetizer 1 uses the weak magnetizing voltage to perform magnetizing work.

[0054] The magnetizing box 3 containing the micro magnets 10 is placed into the weak magnetizing coil 4 to perform a weak magnetizing process, so as to perform a weak magnetizing operation on the multiple micro magnets 10 in the magnetizing box 3 .

[0055] With this arrangement, multiple micro magnets 10 are placed in the magnetizing box 3, and the magnetizing box 3 and the micro magnets 10 can be placed together in the weak magnetizing coil 4 of the first magnetizer 1 for weak magnetization operation. The removal operation is simple and the scattering of multiple micro magnets 10 is avoided.

[0056] Furthermore, in the weak magnetization process, the working range of the weak magnetization voltage is 80V-120V. Within this voltage range, multiple micro magnets 10 can obtain a certain magnetism and show a certain adsorption property in the magnetization direction, but it will not be too large, causing magnetic force waste and affecting subsequent multi-pole magnetization operations.

[0057] As an optional implementation method of an embodiment of the present invention, the micro magnets 10 are stacked and arranged into a long magnet group 11, including the magnetization directions of the micro magnets 10 adsorbing each other to form an easy-to-grab long magnet group 11, that is, multiple micro magnets 10 are adsorbed together along the magnetization direction to form a larger long magnet group 11, and the magnetization directions of the multiple micro magnets 10 are all facing the same direction, which can also provide convenience for subsequent multi-pole magnetization.

[0058] As an optional implementation method of the embodiment of the present invention, each micro magnet 10 in the long magnet group 11 is subjected to multi-pole strong magnetization, including:

[0059] Adjust the voltage of multi-pole magnetization, wherein the voltage range of multi-pole magnetization can be selected according to the multi-pole magnetization requirements of the micro magnet 10, and the optional range can be but is not limited to 200V-3000V.

[0060] Take the long magnet group 11 and place each micro magnet 10 of the long magnet group 11 into the positioning tool 5 respectively. Then, the long magnet group 11 can be taken as a whole, and each micro magnet 10 in the long magnet group 11 can be inserted one by one into the fixed position of the positioning tool 5 for positioning and fixing. The positioning and fixing of each micro magnet 10 can be in the same direction, and the multi-pole magnetization operation of each micro magnet 10 is more accurate and convenient.

[0061] The combination of the positioning tool 5 and the micro magnet 10 is subjected to a multi-pole strong magnetization operation process, wherein the magnetization direction of the micro magnet 10 is the same as the direction of the multi-pole magnetization coil in the multi-pole strong magnetization operation process, so that the micro magnet 10 is more easily magnetized and saturated, and a larger magnetic field strength can be obtained.

[0062] With this arrangement, each micro magnet 10 in the long magnet group 11 can be clamped and fixed as a whole in the positioning fixture 5, and the positioning fixture 5 can support, clamp and position the micro magnet 10, so that the magnetization direction of the micro magnet 10 can be uniformly fixed, and the multi-pole magnetization operation is more convenient.

[0063] Furthermore, the long magnet group 11 can be picked up manually or by a robot, that is, the long magnet group 11 can be transferred from the magnetizing box 3 to the positioning tool 5 by the operator directly manually, or it can be grabbed by a robot on the production line and then transferred and placed, both of which can perform convenient picking operations.

[0064] In summary, see Figure 4 , a general description of the fast multi-pole magnetization method for micro magnets is given:

[0065] Serial number (1) shows the micro magnet 10 in a non-magnetic state, and the arrow on the left indicates that the magnetization direction of the micro magnet 10 is vertical;

[0066] Serial number (2) shows a magnetizing box 3, in which a plurality of micro magnets 10 can be stored;

[0067] Serial number (3) shows that the magnetizing box 3 with the micro magnet 10 is placed on the first magnetizing machine 1 to perform a weak magnetizing process. The magnetizing box 3 is placed in the weak magnetizing coil 4, and the magnetizing box 3 is clamped by the upper pole head 6 and the lower pole head 7 of the first magnetizing machine, thereby performing a weak magnetizing operation.

[0068] Serial number (4) shows the micro magnet 10 after weak magnetization, which has shown adsorption in the vertical magnetization direction;

[0069] Serial number (5) shows that multiple micro magnets 10 can be arranged into a long strip magnet group 11 by attracting each other. When arranged, multiple micro magnets 10 are attracted to each other along the magnetization direction.

[0070] Serial number (6) shows that each micro magnet 10 in the long magnet group 11 is pushed into the fixing groove of the positioning tool 5 for limiting and fixing;

[0071] Serial number (7) shows that the positioning tool 5 and the micro magnet 10 assembly are clamped between the upper pole head 8 of the second magnetizer and the lower pole head 9 of the second magnetizer to perform multi-pole magnetization operation;

[0072] Serial number (8) shows the micro magnet 10 in a planar multipolar state;

[0073] Serial number (9) shows the magnetic pole arrangement from the perspective of the eye in serial number (8). The upper part shows the magnetic pole arrangement when looking down, and the lower part shows the magnetic pole arrangement when looking up. This is the magnetic pole arrangement effect after the micro magnet 10 multi-pole magnetization.

[0074] Example 2:

[0075] Reference Figure 4 The micro-magnet fast multi-pole magnetization device provided in this embodiment includes:

[0076] The first magnetizer 1 is used to perform weak magnetization on the plurality of micro magnets 10. The weak magnetization is unipolar magnetization, so that the magnetization direction of the micro magnets 10 exhibits adsorption.

[0077] A strip arrangement mechanism for stacking the micro magnets 10 into a long strip magnet group 11;

[0078] The second magnetizer 2 is used to perform multi-pole strong magnetization on each micro magnet 10 in the long magnet group 11.

[0079] With such an arrangement, the first magnetizer 1 can be used to first weakly magnetize the plurality of micro magnets 10 so that the micro magnets 10 exhibit adsorption in the magnetization direction, thereby making the micro magnets 10 have a magnetized direction and a non-magnetized direction. The striping mechanism can stack and arrange the plurality of micro magnets 10 after weak magnetization, and the plurality of micro magnets 10 can adsorb each other in the magnetization direction so as to be stacked and arranged into a long magnet group 11. Compared with a single micro magnet 10, the long magnet group 11 has a larger volume and is more convenient to take, and the magnetization direction and non-magnetization direction of the long magnet group 11 are easier to distinguish. The long magnet group 11 can be taken as a whole and sent to the second magnetizer 2. The positioning tool of the second magnetizer 2 orients and fixes each micro magnet 10 respectively, which is more convenient for the multi-pole magnetization operation of the micro magnet 10.

[0080] Furthermore, the striping mechanism is a robot structure, that is, as a preferred implementation method of this embodiment, the robot structure can be used to stack and organize multiple micro magnets 10, which is more convenient and intelligent. After the striping mechanism arranges multiple micro magnets 10 into a long magnet group 11, the long magnet group 11 can be directly transferred from the magnetizing box 3 to the positioning tool 5 by the striping mechanism. Of course, it can also be manually transferred by the operator, and subsequent multi-pole magnetizing processing operations can be carried out smoothly.

[0081] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0082] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A micro-magnet fast multi-pole magnetization method, characterized in that: include: performing weak magnetization on the plurality of micro-magnets, wherein the weak magnetization is unipolar magnetization, so that the magnetization directions of the micro-magnets exhibit adsorption properties; Stacking the micro magnets into long strip magnet groups; The magnetization directions of the micro magnets are mutually attracted to form an easy-to-grab long magnet group; Performing multi-pole strong magnetization on each of the micro magnets in the long magnet group; In the weak magnetization process, the working range of the weak magnetization voltage is 80V-120V; The voltage range of the multi-pole strong magnetization is 200V-3000V; The multi-pole strong magnetization of each of the micro magnets in the long magnet group includes: Adjust the voltage of multi-pole magnetization; Take the long magnet group and place each of the micro magnets in the long magnet group into the positioning tool respectively; Performing a multi-pole strong magnetization operation on the combination of the positioning fixture and the micro magnet; Wherein, the magnetization direction of the micro magnet is the same as the direction of the multi-pole magnetization coil in the multi-pole strong magnetization operation process.

2. The micro-magnet fast multi-pole magnetization method according to claim 1, characterized in that: The weak magnetization of the plurality of micro magnets comprises: placing the non-magnetic micro magnet into a magnetizing box; Adjust the magnetizing voltage to the working range of weak magnetizing voltage; The magnetization box containing the micro magnet is placed into a weak magnetization coil for a weak magnetization process.

3. The micro-magnet fast multi-pole magnetization method according to claim 1, characterized in that: The method of taking the long magnet group is manual taking or mechanical hand taking.

4. A micro-magnet fast multi-pole magnetization device, applied to the micro-magnet fast multi-pole magnetization method according to claim 1, characterized in that: include: A first magnetizer is used to perform weak magnetization on a plurality of micro magnets, wherein the weak magnetization is unipolar magnetization, so that the magnetization direction of the micro magnets exhibits adsorption; A strip arrangement mechanism for stacking the micro-magnets into a long strip magnet group; The second magnetizer is used to perform multi-pole strong magnetization on each of the micro magnets in the long magnet group.

5. The micro-magnet fast multi-pole magnetization device according to claim 4, characterized in that: The strip sorting mechanism is a robot structure.

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