A magnetic component pressure-maintaining device and a method for improving the shear force of a magnetic component

Abstract

The present invention discloses a magnetic component pressure-maintaining device and a method for improving the shear force of a magnetic component. The pressure-maintaining device includes a machine body and a material transfer component arranged on the machine body, a placement table for placing a jig, a hot pressing component, a limit pressure block and a control component; the limit pressure block forms a first pressing plate and a second pressing plate with a height difference, and the first pressing plate and the second pressing plate are used to control the thickness of the glue layer between the steel sheet and the magnet of the magnetic component; the present invention also discloses a method for improving the shear force of a magnetic component, using the pressure-maintaining device. The pressure-maintaining device of the present invention can control the thickness of the glue layer between the steel sheet and the magnet of the magnetic component through the height difference between the first pressing plate and the second pressing plate. The method for improving the shear force of a magnetic component of the present invention uses the pressure-maintaining device, so that the thickness of the glue layer between the steel sheet and the magnet of the magnetic component is controlled between 0.01-0.02mm, the constant temperature of the heating block is controlled to 75°C by the electric control box, and the hot pressing time is 80 seconds, which can effectively improve the shear force of the magnetic component.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic component processing, and in particular to a magnetic component pressure-maintaining device and a method for improving the shear force of a magnetic component. Background Art

[0002] The shear force of a magnetic component refers to its ability to resist deformation and the actual amount of deformation when it is subjected to shear force. Shear force is one of the criteria for evaluating the quality of magnetic components. The shear force performance of a magnetic component directly affects the overall performance and stability of the equipment. By testing the shear force performance of a magnetic component, it can be determined whether it meets the design requirements or industry standards.

[0003] In the current production process, the assembly process of the magnetic component usually adopts a pressure-holding device for constant temperature pressing or uses a tunnel furnace to initially solidify the glue between the steel sheet and the magnet of the magnetic component. The structure of the existing pressure-holding device is relatively complex, and the assembly process does not control the thickness of the glue layer between the steel sheet and the magnet, resulting in low shear force of the magnetic component and poor product quality. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic assembly pressure maintaining device and a method for improving the shear force of the magnetic assembly, which has a simple structure and can effectively control the thickness of the glue layer between the steel sheet and the magnet, improve the shear force of the magnetic assembly, and improve product quality.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a magnetic component pressure maintaining device, including a machine body and a material moving assembly arranged on the machine body, a placement table for placing a jig, a hot pressing assembly, a limit pressure block and a control assembly; the material moving assembly is arranged at the bottom of the machine body, the placement table is arranged on the material moving assembly, and the material moving assembly is used to carry the magnetic assembly on the jig; the hot pressing assembly is vertically arranged on the top of the machine body, the limit pressure block is detachably arranged at the lower end of the hot pressing assembly and facing the placement table, and a limit pressure head is provided on the limit pressure block, and a first pressure plate and a second pressure plate with a height difference are formed on the limit pressure head, the first pressure plate and the second pressure plate respectively abut against the steel sheets of the jig and the magnetic assembly, and the first pressure plate and the second pressure plate are used to control the thickness of the glue layer between the steel sheet of the magnetic assembly and the magnet; the control assembly is arranged on the machine body, and the control assembly is electrically connected to the hot pressing assembly and the material moving assembly, respectively.

[0006] In a preferred embodiment, the limit pressure block also includes a guide block, a cover plate and a compression spring. The guide block is provided with a plurality of guide grooves for sliding and assembling the limit pressure head. A flange is provided in the guide groove, and the limit pressure head slides against the flange. The cover plate is arranged on the side of the guide block away from the flange, and the compression spring is arranged between the limit pressure head and the cover plate.

[0007] In a preferred embodiment, the limiting pressure head is in the shape of a rectangular parallelepiped, and the four corners of the bottom of the limiting pressure head are respectively provided with a first pressure plate, and a second pressure plate is provided between the two first pressure plates on one side of the bottom of the limiting pressure head, and the first pressure plate and the second pressure plate are both in the shape of sheets, and the length of the first pressure plate is greater than the length of the second pressure plate, the first pressure plate abuts on the jig, and the second pressure plate abuts on the steel sheet of the magnetic assembly.

[0008] Preferably, the hot pressing assembly includes a pressing cylinder, a heat insulation plate, a heating block and a heating rod, wherein the pressing cylinder is fixedly arranged on the top of the machine body, the output end of the pressing cylinder is fixedly connected to the heating block, the heat insulation plate is arranged between the output end of the pressing cylinder and the heating block, and the heating rod is arranged inside the heating block.

[0009] In a preferred embodiment, the control component includes an electric control box, a temperature controller, and a temperature sensor. The electric control box is electrically connected to the heating rod, the temperature controller, and the temperature sensor, respectively. The electric control box is arranged on the rear side of the machine body to control the heating temperature transmitted from the heating rod to the heating block. The temperature controller is arranged on the front side of the machine body to control the constant temperature of the heating block. The temperature sensor is arranged on the downward pressure cylinder to detect the temperature of the heating block.

[0010] Preferably, a plurality of adsorption magnets and positioning pins are provided at the bottom of the heating block, a first positioning groove is provided at the top of the cover plate, and the cover plate is embedded in the first positioning groove through the positioning pins and is detachably fixed on the heating block in cooperation with the adsorption magnets.

[0011] In a preferred embodiment, the material moving assembly includes a mobile cylinder, a connecting plate, a slide rail and a slider. The mobile cylinder is fixedly arranged at the bottom of the machine body, the slide rail is fixedly arranged on one side of the mobile cylinder and is consistent with the movement direction of the output end of the mobile cylinder, the slider is slidably arranged on the slide rail, the bottom of the connecting plate is fixedly arranged on the slider, the side of the connecting plate is connected to the output end of the mobile cylinder, and the placing table is fixedly arranged on the connecting plate.

[0012] In a preferred embodiment, the placing table includes a fixed plate, a limiting guide plate, a reverse thrust spring, a guide column and a placing plate, wherein the fixed plate is fixedly arranged on the connecting plate of the material moving assembly, limiting guide plates are fixedly arranged on both sides of the fixed plate, guide columns are arranged on the fixed plate, a blind hole is arranged at the bottom of the placing plate, one end of the reverse thrust spring is sleeved on the guide column, and the other end of the reverse thrust spring rests on the blind hole, so that the placing plate can move up and down between the limiting guide plates on both sides of the fixed plate, and the jig is placed on the placing plate.

[0013] The preferred embodiment also includes a positioning plate and a pin. The positioning plate cover is arranged on the top of the fixture. The positioning plate is provided with a positioning portion matching the magnetic assembly. The fixture is provided with a second positioning groove. The positioning plate is provided with a positioning through hole at a position matching the second positioning groove. The pin passes through the positioning through hole and is embedded in the second positioning groove so that the positioning portion is aligned with the magnetic assembly.

[0014] A method for improving the shear force of a magnetic assembly, using the above-mentioned pressure-maintaining device, comprises the following steps:

[0015] S1: Place the magnet with glue dispensed on it in the jig, set the positioning sheet cover on the top surface of the jig, position it with the pins, and place the steel sheet on the magnet of the positioning part;

[0016] S2: Place the jig together with the positioning sheet as a whole on the placement plate. The placement plate keeps the jig at the upper limit position of the limit guide plate under the action of the reverse thrust spring;

[0017] S3: The electric control box drives the moving cylinder to drive the connecting plate to move along the slide rail through the slider, and the fixture on the connecting plate moves to the pressing station. The electric control box drives the pressing cylinder to press downward, so that the limit pressing block abuts against the fixture, the fixture moves downward, and the edges of both ends of the positioning piece abut against the limit guide plate;

[0018] S4: The jig continues to move downward until the guide column abuts against the top of the blind hole of the jig, and the positioning sheet is separated from the jig;

[0019] S5: The first pressing plate of the limiting pressure head rests on the fixture, and the second pressing plate of the limiting pressure head rests on the steel sheet of the magnetic assembly. The height difference between the first pressing plate and the second pressing plate controls the thickness of the glue layer between the steel sheet of the magnetic assembly and the magnet to be between 0.01-0.02mm. The electric control box controls the constant temperature of the heating block to 75°C, and the hot pressing time is 80 seconds.

[0020] After adopting the above scheme, the beneficial effect of the present invention is that the pressure-maintaining device of the present invention can control the thickness of the glue layer between the steel sheet and the magnet of the magnetic assembly through the height difference between the first pressing plate and the second pressing plate, and the structure is simple and easy to use. The method of improving the shear force of the magnetic assembly of the present invention uses the pressure-maintaining device to control the thickness of the glue layer between the steel sheet and the magnet of the magnetic assembly to be between 0.01-0.02mm, and the constant temperature of the heating block is controlled to 75°C by the electric control box, and the hot pressing time is 80 seconds, which can effectively improve the shear force of the magnetic assembly and improve the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the pressure-maintaining device of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 It is a schematic diagram of the position limiting pressing block of the pressure maintaining device of the present invention being installed on the hot pressing assembly;

[0024] Figure 4 It is a bottom view of the limit pressing block of the pressure-maintaining device of the present invention removed from the hot pressing assembly;

[0025] Figure 5 It is a top view of the limiting pressing block of the pressure-maintaining device of the present invention removed from the hot pressing assembly;

[0026] Figure 6 It is a schematic diagram of the limiting pressure head of the limiting pressure block of the pressure-maintaining device of the present invention pressing on the jig and the steel sheet;

[0027] Figure 7 yes Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 8 It is a schematic diagram of a partial explosion structure of a limit pressure block of a pressure-maintaining device of the present invention;

[0029] Fig. 9 It is a top view of the limiting pressure head of the pressure maintaining device of the present invention;

[0030] Fig.10 It is a front view of the limiting pressure head of the pressure maintaining device of the present invention;

[0031] Fig.11 is a schematic diagram of a material moving assembly of a pressure-maintaining device of the present invention;

[0032] Fig.12 It is a schematic diagram of a partial exploded structure of a pressure-maintaining device placement platform of the present invention;

[0033] Fig.13 This is a shear force fitting distribution comparison diagram of the product produced by process D using the method for improving the shear force of a magnetic component of the present invention and the products produced by other processes, wherein the abscissa is the process type and the ordinate is the shear force value in Newtons;

[0034] Fig.14 This is a shear force test table for magnetic components with different adhesive layer thicknesses.

[0035] Description of labels:

[0036] 1. Machine body; 11. Top plate; 12. Bottom plate; 13. Support column; 2. Material moving assembly; 21. Moving cylinder; 22. Connecting plate; 23. Slide rail; 24. Slider; 3. Placement table; 31. Fixed plate; 32. Limiting guide plate; 33. Reverse thrust spring; 34. Guide column; 35. Placement plate; 36. Positioning sheet; 4. Hot pressing assembly; 41. Pressing cylinder; 42. Heat insulation board; 43. Heating block; 4 31. Adsorption magnet; 432. Positioning pin; 5. Limiting pressure block; 50. Limiting pressure head; 51. First pressure plate; 52. Second pressure plate; 53. Guide block; 531. Guide groove; 532. Flange; 54. Cover plate; 541. First positioning groove; 55. Compression spring; 6. Control assembly; 61. Electric control box; 62. Temperature controller; 63. Temperature sensor; 7. Fixture; 71. Magnet; 72. Steel sheet. DETAILED DESCRIPTION

[0037] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0038] This embodiment provides a magnetic component pressure maintaining device, such as Figures 1 to 12 As shown, it includes a body 1 and a material moving component 2 arranged on the body 1, a placement table 3 for placing a jig 7, a hot pressing component 4, a limiting pressure block 5 and a control component 6; the material moving component 2 is arranged at the bottom of the body 1, the placement table 3 is arranged on the material moving component 2, and the material moving component 2 is used to carry the magnetic component on the jig 7; the hot pressing component 4 is vertically arranged on the top of the body 1, the limiting pressure block 5 is detachably arranged at the lower end of the hot pressing component 4 and faces the placement table 3, and a limiting pressure head 50 is provided on the limiting pressure block 5, and a first pressing plate 51 and a second pressing plate 52 with a height difference are formed on the limiting pressure head 50, the first pressing plate 51 and the second pressing plate 52 respectively abut against the jig 7 and the steel sheet 72 of the magnetic component, and the first pressing plate 51 and the second pressing plate 52 are used to control the thickness of the glue layer between the steel sheet 72 of the magnetic component and the magnet 71; the control component 6 is arranged on the body 1, and the control component 6 is electrically connected to the hot pressing component 4 and the material moving component 2 respectively.

[0039] The machine body 1 of this embodiment includes a top plate 11 and a bottom plate 12, which are connected and fixed by four support columns 13, but are not limited thereto. Both the top plate 11 and the bottom plate 12 are rectangular, and the size of the top plate 11 is smaller than that of the bottom plate 12. The material moving assembly 2 is fixedly arranged on the bottom plate 12, and is used to drive the placement table 3 to move along the front and rear direction of the bottom plate 12. The hot pressing assembly 4 is arranged at the bottom of the top plate 11, and the output end of the hot pressing assembly 4 is arranged vertically downward. The limiting pressure block 5 is provided with a limiting pressure head 50, and the thickness of the glue layer between the steel sheet 72 and the magnet 71 of the magnetic assembly can be controlled by the height difference between the first pressing plate 51 and the second pressing plate 52. The structure is simple. If the thickness of the glue layer needs to be adjusted, it is only necessary to adjust the height difference between the first pressing plate 51 and the second pressing plate 52. The control assembly 6 is arranged at the rear side of the top plate 11, and is used to control the hot pressing assembly 4 to perform hot pressing and the moving assembly to carry the magnetic assembly, and can perform semi-automatic operation to reduce the manual burden.

[0040] like Figure 8As shown, the limit pressing block 5 of this embodiment also includes a guide block 53, a cover plate 54 and a compression spring 55. The guide block 53 is provided with a plurality of guide grooves 531 for sliding assembly of the limit pressing head 50, which provide guidance for the sliding of the limit pressing head 50 and ensure the accuracy of the limit pressing head 50 when pressing down on the magnetic assembly. A flange 532 is provided in the guide groove 531, and the limit pressing head 50 slides against the flange 532. The cover plate 54 is covered on the side of the guide block 53 away from the flange 532, and the compression spring 55 is arranged between the limit pressing head 50 and the cover plate 54. Each limit pressing head 50 of this embodiment is individually provided with a compression spring 55, which can ensure that the limit pressing head 50 is fully pressed down on the magnetic assembly, ensure the consistency of each magnetic assembly, and improve product quality.

[0041] like Fig. 9 and Fig.10 As shown, the limiting pressure head 50 of this embodiment is in the shape of a rectangular parallelepiped, but is not limited thereto. The four corners of the bottom of the limiting pressure head 50 are respectively provided with a first pressing plate 51, and the bottom of the limiting pressure head 50 is provided with a second pressing plate 52 between the two first pressing plates 51 on one side. The first pressing plate 51 and the second pressing plate 52 are both in the shape of a sheet, and the length of the first pressing plate 51 is greater than the length of the second pressing plate 52, and the two form a height difference. The first pressing plate 51 abuts on the fixture 7, and the second pressing plate 52 abuts on the steel sheet 72 of the magnetic assembly. The first pressing plates 51 at the four corners provide a stable support for the limiting pressure head 50, while the second pressing plate 52 directly applies pressure to the steel sheet 72 of the magnetic assembly, so that the pressure applied by the limiting pressure head 50 is more evenly distributed on the magnetic assembly, avoiding the problem of local stress concentration caused by single-point pressure. The limiting pressure head 50 of this embodiment is provided with four groups, and four groups of magnetic assemblies can be placed on the corresponding fixture 7. In other embodiments, the number of magnetic assemblies on the limiting pressure head 50 and the fixture 7 can also be adjusted.

[0042] like Figures 3 to 5 As shown, the hot pressing assembly 4 includes a pressing cylinder 41, a heat insulation plate 42, a heating block 43 and a heating rod (not shown in the figure), the pressing cylinder 41 is fixedly arranged on the top of the machine body 1, the output end of the pressing cylinder 41 is fixedly connected to the heating block 43, the heat insulation plate 42 is arranged between the output end of the pressing cylinder 41 and the heating block 43, and the heating rod is arranged inside the heating block 43.

[0043] The downward pressure cylinder 41 of this embodiment serves as a power source and can accurately control the downward pressure depth and speed of the heating block 43, ensuring that the internal glue layer of the magnetic assembly can be fully compressed and solidified when subjected to uniform and constant pressure, thereby improving the overall performance of the magnetic assembly. The heating rod arranged inside the heating block 43 can quickly and evenly heat the entire surface of the heating block 43, ensuring that the magnetic assembly is subjected to uniform heat transfer during the pressure-maintaining process. The heat insulation plate 42 not only prevents the downward pressure cylinder 41 from being damaged by high temperature, but also reduces heat loss, improves heat conduction efficiency, and ensures that the heat generated by the heating block 43 can fully act on the magnetic assembly instead of being wasted in the surrounding environment.

[0044] like Figure 1 As shown, the control component 6 includes an electric control box 61, a temperature controller 62, and a temperature sensor 63. The electric control box 61 is electrically connected to the heating rod, the temperature controller 62, and the temperature sensor 63, respectively. The electric control box 61 is arranged on the rear side of the machine body 1, and is used to control the heating temperature transmitted from the heating rod to the heating block 43. The temperature controller 62 is arranged on the front side of the machine body 1, and is used to control the constant temperature of the heating block 43. The temperature sensor 63 is arranged on the downward pressure cylinder 41, and is used to detect the temperature of the heating block 43.

[0045] In this embodiment, the temperature controller 62 is arranged on the front side of the machine body 1, and can intuitively display and adjust the temperature of the heating block 43. By cooperating with the electric control box 61, the temperature controller 62 can accurately control the heating power transmitted from the heating rod to the heating block 43, thereby realizing constant control of the temperature of the heating block 43, ensuring that the magnetic assembly is subjected to uniform and stable temperature during the pressure holding process, and improving the pressure holding quality. The temperature sensor 63 is arranged on the pressing cylinder 41, close to the heating block 43, and can detect the temperature of the heating block 43 in real time. Once the temperature deviates from the set value, the electric control box 61 can quickly adjust the heating power of the heating rod to restore the constant temperature, thereby ensuring the stability and reliability of the pressure holding process.

[0046] like Figure 4 and Figure 5 As shown, the bottom of the heating block 43 is provided with a plurality of adsorption magnets 431 and positioning pins 432, and the top of the cover plate 54 is provided with a first positioning groove 541. The cover plate 54 is detachably fixed on the heating block 43 by being embedded in the first positioning groove 541 through the positioning pin 432 and cooperating with the adsorption magnet 431. The limiting pressing block 5 of this embodiment is fast loaded and unloaded by cooperating with the adsorption magnet 431 and the positioning pin 432 through the first positioning groove 541 of the cover plate 54. When the limiting pressing block 5 of different specifications needs to be replaced, the magnetic force of the adsorption magnet 431 can be easily released, making the disassembly process simpler and faster.

[0047] like Figure 2 and Fig.11As shown, the material moving assembly 2 includes a moving cylinder 21, a connecting plate 22, a slide rail 23 and a slider 24. The moving cylinder 21 is fixedly arranged at the bottom of the body 1, the slide rail 23 is fixedly arranged on one side of the moving cylinder 21, and is consistent with the movement direction of the output end of the moving cylinder 21. The slider 24 is slidably arranged on the slide rail 23, the bottom of the connecting plate 22 is fixedly arranged on the slider 24, the side of the connecting plate 22 is connected to the output end of the moving cylinder 21, and the placing table 3 is fixedly arranged on the connecting plate 22.

[0048] The movable cylinder 21 of this embodiment is used to drive the magnetic assembly on the jig 7 to move to the pressing station below the limiting pressure head 50. When the magnetic assembly completes the pressure maintenance, the movable cylinder 21 is used to drive the magnetic assembly on the jig 7 away from the pressing station to realize semi-automatic operation. It can ensure that the magnetic assembly is accurately moved to the hot pressing station, reduce position deviation or error, and improve production efficiency and product quality.

[0049] like Figure 2 and Fig.12 As shown, the placement table 3 includes a fixed plate 31, a limiting guide plate 32, a reverse thrust spring 33, a guide column 34 and a placement plate 35. The fixed plate 31 is fixedly arranged on the connecting plate 22 of the material moving assembly 2. The limiting guide plates 32 are fixedly arranged on both sides of the fixed plate 31. The limiting guide plates 32 limit the movement of the placement plate 35 in the horizontal direction, effectively preventing the deviation caused by vibration or external force, and ensuring the accuracy and stability of the placement of the fixture 7. A guide column 34 is arranged on the fixed plate 31, and a blind hole is arranged at the bottom of the placement plate 35. One end of the reverse thrust spring 33 is sleeved on the guide column 34, and the other end of the reverse thrust spring 33 is against the blind hole, so that the placement plate 35 is movably arranged between the limiting guide plates 32 on both sides of the fixed plate 31. The fixture 7 is placed on the placement plate 35. By arranging the reverse thrust spring 33, a buffering effect can be played to improve the stability of this assembly during pressure maintenance.

[0050] like Figure 2 , Figure 6 and Figure 7 As shown, it also includes a positioning piece 36 and a pin (not shown in the figure), the positioning piece 36 is covered on the top of the fixture 7, a positioning portion matching the magnetic assembly is provided on the positioning piece 36, a second positioning groove is provided on the fixture 7, and a positioning through hole is provided on the positioning piece 36 at a position matching the second positioning groove, and the pin passes through the positioning through hole and is embedded in the second positioning groove so that the positioning portion is aligned with the magnetic assembly.

[0051] The positioning portion that matches the magnetic assembly is provided on the positioning sheet 36 of this embodiment. By setting a second positioning groove to cooperate with the positioning through hole, it can ensure that the positioning portion of the positioning sheet 36 is aligned with the steel sheet 72 on the magnetic assembly, ensuring that the magnetic assembly can be accurately aligned when placed on the fixture 7, which is crucial for subsequent hot pressing processing and can avoid processing errors or defective products caused by position deviation.

[0052] The usage process of this embodiment is as follows:

[0053] The operator first places the magnet 71 with glue on it in the jig 7, covers the top surface of the jig 7 with the positioning sheet 36, positions it with the pins, and puts the steel sheet 72 on the magnet 71 of the positioning part.

[0054] Then, the jig 7 together with the positioning sheet 36 is placed on the placement plate 35 as a whole. Under the action of the reverse thrust spring 33 , the placement plate 35 keeps the jig 7 at the upper limit position of the limiting guide plate 32 .

[0055] Press the start button of the electric control box 61, the electric control box 61 drives the moving cylinder 21 to drive the connecting plate 22 to move along the slide rail 23 through the slider 24, the fixture 7 on the connecting plate 22 moves to the pressing station, the electric control box 61 drives the pressing cylinder 41 to move downward, so that the limiting pressure block 5 abuts against the fixture 7, the fixture 7 moves downward, and the edges at both ends of the positioning piece 36 abut against the limiting guide plate 32.

[0056] The jig 7 continues to move downward until the guide column 34 rests against the top of the blind hole of the jig 7. At this time, the positioning plate 36 is separated from the jig 7, and the first pressure plate 51 of the limiting pressure head 50 rests on the jig 7, and the second pressure plate 52 of the limiting pressure head 50 rests on the steel sheet 72 of the magnetic assembly. Through the pre-set height difference between the first pressure plate 51 and the second pressure plate 52, in conjunction with the hot pressing of the heating block 43, the magnetic assembly can be pressure-maintained to a certain thickness of the glue layer.

[0057] This embodiment also provides a method for improving the shear force of a magnetic assembly, using the above-mentioned pressure-maintaining device, comprising the following steps:

[0058] S1: Place the magnet 71 with glue dispensed on it in the jig 7, cover the top surface of the jig 7 with the positioning sheet 36, position it with the pins, and put the steel sheet 72 on the magnet 71 of the positioning part;

[0059] S2: The jig 7 and the positioning sheet 36 are placed on the placement plate 35 as a whole. The placement plate 35 keeps the jig 7 at the upper limit position of the limit guide plate 32 under the action of the reverse thrust spring 33;

[0060] S3: The electric control box 61 drives the moving cylinder 21 to drive the connecting plate 22 to move along the slide rail 23 through the slider 24, and the fixture 7 on the connecting plate 22 moves to the pressing position. The electric control box 61 drives the pressing cylinder 41 to press downward, so that the limit pressing block 5 abuts against the fixture 7, the fixture 7 moves downward, and the edges at both ends of the positioning piece 36 abut against the limit guide plate 32;

[0061] S4: the jig 7 continues to move downward until the guide column 34 abuts against the top of the blind hole of the jig 7, and the positioning sheet 36 is separated from the jig 7;

[0062] S5: The first pressing plate 51 of the limiting pressure head 50 abuts against the fixture 7, and the second pressing plate 52 of the limiting pressure head 50 abuts against the steel sheet 72 of the magnetic assembly. The height difference between the first pressing plate 51 and the second pressing plate 52 is used to control the thickness of the glue layer between the steel sheet 72 of the magnetic assembly and the magnet 71 to be between 0.01-0.02 mm. The electrical control box 61 controls the constant temperature of the heating block 43 to 75°C, and the hot pressing time is 80 seconds.

[0063] The glue used in step S1 of this embodiment is AB glue 8540, which has the characteristics of high strength, high toughness, and fast curing, and can ensure the stability of the bonding between the magnet 71 and the steel sheet 72. In step S5, the shear force of different glue layer thicknesses is verified, such as Fig.14 As shown, the shear force is optimal when the thickness of the adhesive layer is between 0.01-0.02 mm, and the constant temperature of the heating block 43 is set to 75°C, which is lower than the demagnetization temperature of the magnet 71. Since the heat conduction rate of the heating block 43 on the hot pressing assembly 4 is greater than the heat conduction rate of the air in the tunnel furnace, the hot pressing time only needs to be set to 80 seconds, thereby improving production efficiency.

[0064] like Fig.13 As shown, compared with process A, process B and process C, process D of the method provided in this embodiment can effectively improve the shear force of the magnetic component.

[0065] Specifically, process A includes the following steps: A1: placing the magnetic assembly at the specified position of the fixture; A2: using a glue dispenser to dispense glue on the bonding surface, controlling the shape and amount of the glue dispensed, and ensuring that the glue can cover the bonding surface of the magnet and the steel sheet; A3: placing a positioning plate on the fixture, with a positioning groove set on the positioning plate, and placing the steel sheet on the glued magnet through the positioning groove; A4: using a pressing tool that does not control the thickness of the glue layer to press the steel sheet and the magnet until there is glue overflow around the bonding edge; A5: placing the pressed magnetic assembly together with the fixture as a whole into a tunnel furnace to solidify the glue layer. The time from the glue dispenser completing the glue dispenser to the time of placing the glue into the tunnel furnace is less than 40 seconds. The temperature of the tunnel furnace is 75°C, and the curing time is 150 seconds.

[0066] Process B includes five steps. Steps B1 to B3 and B5 are the same as steps A1 to A3 and A5 of process A. The difference is step B4: using a pressing tool that controls the thickness of the glue layer to press the steel sheet and the magnet until there is glue overflow around the bonding edge.

[0067] Process C includes four steps. Steps C1 to C3 are the same as steps A1 to A3 of process A. The difference is step C4: the steel sheet and the magnet are pressed into place using a hot pressing tool that does not control the thickness of the glue layer. The hot pressing tool temperature is 75°C and the hot pressing time is 80 seconds.

[0068] In this embodiment, the thickness of the glue layer between the steel sheet and the magnet of the magnetic assembly is controlled between 0.01-0.02 mm. By setting the constant temperature to 75°C and the hot pressing time to 80 seconds, the shear force of the magnetic assembly can be effectively improved, and the production efficiency and product quality can be improved.

[0069] The directional terms mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0070] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. A magnetic component pressure-maintaining device, characterized in that: It includes a machine body and a material transfer assembly arranged on the machine body, a placement table for placing a jig, a hot pressing assembly, a limit pressing block and a control assembly; The material moving assembly is arranged at the bottom of the machine body, and the placing table is arranged on the material moving assembly, and the material moving assembly is used to carry the magnetic assembly on the jig; The hot pressing assembly is vertically arranged on the top of the machine body, the limiting pressing block is detachably arranged at the lower end of the hot pressing assembly and faces the placing table, the limiting pressing block is provided with a limiting pressing head, a first pressing plate and a second pressing plate with a height difference are formed on the limiting pressing head, the first pressing plate and the second pressing plate are respectively against the steel sheet of the jig and the magnetic assembly, and the first pressing plate and the second pressing plate are used to control the thickness of the glue layer between the steel sheet of the magnetic assembly and the magnet; The control component is arranged on the machine body, and the control component is electrically connected to the hot pressing component and the material moving component respectively; The limit pressure block also includes a guide block, a cover plate and a compression spring. The guide block is provided with a plurality of guide grooves for sliding and assembling the limit pressure head. A flange is provided in the guide groove. The limit pressure head slides against the flange. The cover plate is provided on a side of the guide block away from the flange. The compression spring is provided between the limit pressure head and the cover plate. The control assembly includes an electric control box, a temperature controller, and a temperature sensor; The material moving assembly includes a moving cylinder, a connecting plate, a slide rail and a slider. The moving cylinder is fixedly arranged at the bottom of the machine body, the slide rail is fixedly arranged at one side of the moving cylinder and is consistent with the movement direction of the output end of the moving cylinder. The slider is slidably arranged on the slide rail, the bottom of the connecting plate is fixedly arranged on the slider, the side of the connecting plate is connected to the output end of the moving cylinder, and the placing table is fixedly arranged on the connecting plate; The placing table comprises a fixed plate, a limit guide plate, a reverse thrust spring, a guide column and a placing plate, wherein the fixed plate is fixedly arranged on the connecting plate of the material moving assembly, limit guide plates are fixedly arranged on both sides of the fixed plate, guide columns are arranged on the fixed plate, a blind hole is arranged at the bottom of the placing plate, one end of the reverse thrust spring is sleeved on the guide column, and the other end of the reverse thrust spring abuts against the blind hole, so that the placing plate is movably arranged between the limit guide plates on both sides of the fixed plate, and the fixture is placed on the placing plate; It also includes a positioning piece and a pin. The positioning piece cover is arranged on the top of the fixture. A positioning portion matching the magnetic assembly is provided on the positioning piece. A second positioning groove is provided on the fixture. A positioning through hole is provided on the positioning piece at a position matching the second positioning groove. The pin passes through the positioning through hole and is embedded in the second positioning groove so that the positioning portion is aligned with the magnetic assembly.

2. A magnetic assembly pressure maintaining device as claimed in claim 1, characterized in that: The limiting pressure head is in the shape of a rectangular parallelepiped, and the four corners of the bottom of the limiting pressure head are respectively provided with first pressure plates, and a second pressure plate is provided between the two first pressure plates on one side of the bottom of the limiting pressure head. The first pressure plate and the second pressure plate are both in the shape of sheets, and the length of the first pressure plate is greater than the length of the second pressure plate. The first pressure plate rests on the jig, and the second pressure plate rests on the steel sheet of the magnetic assembly.

3. A magnetic assembly pressure maintaining device according to claim 1, characterized in that: The hot pressing assembly includes a pressing cylinder, a heat insulation plate, a heating block and a heating rod. The pressing cylinder is fixedly arranged on the top of the machine body, the output end of the pressing cylinder is fixedly connected to the heating block, the heat insulation plate is arranged between the output end of the pressing cylinder and the heating block, and the heating rod is arranged inside the heating block.

4. A magnetic assembly pressure maintaining device as claimed in claim 3, characterized in that: The electric control box is electrically connected to the heating rod, the temperature controller and the temperature sensor respectively. The electric control box is arranged on the rear side of the machine body, and is used to control the heating temperature transmitted from the heating rod to the heating block. The temperature controller is arranged on the front side of the machine body, and is used to control the constant temperature of the heating block. The temperature sensor is arranged on the downward pressure cylinder, and is used to detect the temperature of the heating block.

5. A magnetic assembly pressure maintaining device as claimed in claim 3, characterized in that: A plurality of adsorption magnets and positioning pins are arranged at the bottom of the heating block, a first positioning groove is arranged at the top of the cover plate, and the cover plate is embedded in the first positioning groove through the positioning pin and is detachably fixed on the heating block in cooperation with the adsorption magnets.

6. A method for increasing the shear force of a magnetic assembly, using the pressure-maintaining device according to any one of claims 3 to 5, characterized in that: The following steps are involved: S1: Place the magnet with glue dispensed on it in the jig, set the positioning sheet cover on the top surface of the jig, position it with the pins, and place the steel sheet on the magnet of the positioning part; S2: Place the jig together with the positioning sheet as a whole on the placement plate. The placement plate keeps the jig at the upper limit position of the limit guide plate under the action of the reverse thrust spring; S3: The electric control box drives the moving cylinder to drive the connecting plate to move along the slide rail through the slider, and the fixture on the connecting plate moves to the pressing station. The electric control box drives the pressing cylinder to press downward, so that the limit pressing block abuts against the fixture, the fixture moves downward, and the edges of both ends of the positioning piece abut against the limit guide plate; S4: The jig continues to move downward until the guide column abuts against the top of the blind hole of the jig, and the positioning sheet is separated from the jig; S5: The first pressing plate of the limiting pressure head rests on the fixture, and the second pressing plate of the limiting pressure head rests on the steel sheet of the magnetic assembly. The height difference between the first pressing plate and the second pressing plate controls the thickness of the glue layer between the steel sheet of the magnetic assembly and the magnet to be between 0.01-0.02mm. The electric control box controls the constant temperature of the heating block to 75°C, and the hot pressing time is 80 seconds.

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