Electromagnetic winding device and winding method for electronic products

Abstract

The present invention discloses an electromagnetic winding device for electronic products and a winding method thereof, comprising a pay-off frame, a guide frame and a winding mechanism arranged in sequence; the winding mechanism comprises: a rotating platform, a servo motor, a base plate, a telescopic pressure ring and a pressure block driving assembly; the telescopic pressure ring is arranged on the upper part of the base plate, and is composed of a plurality of independent sector-shaped pressure blocks, covering the winding area of ​​the electromagnetic coil; the pressure block driving assembly is used to drive each sector-shaped pressure block to move radially outward from the center of the base plate. The precise winding of the electromagnetic coil is achieved by the rotating platform, and the telescopic pressure ring and the gasket are used to apply a pressing force to the wound electromagnetic coil to maintain flatness and consistency, while avoiding damage to the copper wire surface. This solves the problem in the prior art that in the winding process of a single-layer planar hollow electromagnetic coil, warping, collapse or uneven turn spacing due to internal stress release or external disturbance is easy to occur, which seriously affects the flatness and electrical consistency of the coil.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic coil winding, and in particular to an electromagnetic winding device for electronic products and a winding method thereof. Background Art

[0002] Single-layer, planar, hollow electromagnetic coils, due to their coreless structure, offer low hysteresis losses, excellent high-frequency response, and strong heat dissipation. They are widely used in fields such as radio frequency identification (RFID), wireless energy transmission, and high-frequency resonant circuits. Currently, the mainstream winding method for these coils is the cast-on-bond method: the wire is wound onto a temporary mandrel, coated with curing adhesive, and then the mandrel is removed to form a self-supporting hollow structure.

[0003] However, when winding this method, as the number of coil turns increases, the hollow electromagnetic coil lacks rigid constraints and is prone to warping, collapse, or uneven turn spacing due to internal stress release or external disturbances, seriously affecting the flatness and electrical consistency of the coil.

[0004] Therefore, it is necessary to provide an electromagnetic winding device and a winding method for electronic products to solve the above technical problems. Summary of the Invention

[0005] The present invention overcomes the deficiencies of the prior art and provides an electromagnetic winding device and a winding method for an electronic product.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: an electromagnetic winding device for electronic products, comprising a pay-off frame, a guide frame and a winding mechanism arranged in sequence; the winding mechanism comprises:

[0007] Rotating platform;

[0008] A servo motor is provided at the lower portion of the rotating platform, and is used to drive the rotating platform to rotate horizontally in a clockwise or counterclockwise direction;

[0009] A base plate is provided on the upper surface of the rotating platform, and the base plate is adapted to the inner diameter shape of the electromagnetic coil;

[0010] The telescopic pressure ring is arranged on the upper part of the base plate and is composed of a plurality of independent sector-shaped pressure blocks, covering the winding area of ​​the electromagnetic coil;

[0011] and a pressing block driving assembly for driving each of the sector-shaped pressing blocks to move radially outward from the center of the base plate.

[0012] In a preferred embodiment of the present invention, the rotating platform includes: a rotatable movable platform and a fixed platform located radially outside the movable platform.

[0013] In a preferred embodiment of the present invention, the base plate adopts a modular structure and is installed at the center of the upper surface of the rotating platform by means of threads, buckles, pins, etc.

[0014] In a preferred embodiment of the present invention, the base plate is adapted to the inner diameter shape of the electromagnetic coil to be wound, including circular, rectangular, polygonal, etc.

[0015] In a preferred embodiment of the present invention, a gasket is provided between the telescopic pressure ring and the base plate. The edge of the gasket naturally rises in a relaxed state, and its surface contacts the wound electromagnetic coil in a tightened state.

[0016] In a preferred embodiment of the present invention, the shape of the gasket is similar to that of the electromagnetic coil to be wound, but slightly larger than the size of the electromagnetic coil to be wound.

[0017] In a preferred embodiment of the present invention, the gasket is made of silicone, polyurethane or memory metal material.

[0018] In a preferred embodiment of the present invention, a guide rail frame is provided above the telescopic pressure ring, and the guide rail frame is detachably connected to the base plate.

[0019] In a preferred embodiment of the present invention, a plurality of guide grooves are provided on the surface of the guide rail frame, each of the guide grooves corresponds to a sector-shaped pressure block, a slider is provided on the upper surface of the corresponding sector-shaped pressure block, and the slider is slidably connected to the inside of the corresponding guide groove.

[0020] In a preferred embodiment of the present invention, the micro electric cylinders are mounted on the guide rail frame in a circular array, with their output ends facing the center of the base plate and connected to the sector-shaped pressing blocks.

[0021] In a preferred embodiment of the present invention, the guide rail frame is provided with a plurality of limit rods corresponding to the lower surface of the telescopic pressure ring, the number of the limit rods is consistent with the fan-shaped pressure block, and a limit groove is provided on the surface of the fan-shaped pressure block, the limit groove is coaxial with the outward radial movement path of the fan-shaped pressure block, the limit rod passes through the limit groove, and the circumferential surface of the limit rod is slidably connected to the inner wall of the limit groove.

[0022] In a preferred embodiment of the present invention, the number of the sector-shaped pressing blocks is 6-12.

[0023] In a preferred embodiment of the present invention, the pressing block driving assembly includes: a plurality of micro electric cylinders, the output end of each micro electric cylinder is fixedly connected to one of the sector-shaped pressing blocks, and independently drives the sector-shaped pressing blocks to move.

[0024] In a preferred embodiment of the present invention, the pressing block driving assembly includes:

[0025] A plurality of micro electric cylinders, each of which has a linkage member at its output end;

[0026] A plurality of connecting rods are provided at both ends of the linkage member, and the other end of each connecting rod is connected to one of the sector-shaped pressing blocks;

[0027] Wherein, one of the micro electric cylinders drives the synchronous displacement of a plurality of the sector-shaped pressing blocks through the linkage member and the connecting rod.

[0028] In a preferred embodiment of the present invention, one end of the connecting rod is rotatably connected to the sector-shaped pressing block.

[0029] In a preferred embodiment of the present invention, the pay-off frame is provided with a pay-off drum; the guide frame is provided with a clamping roller frame, and the clamping roller frame is provided with a pair of horizontally arranged clamping rollers.

[0030] A method for winding an electromagnetic coil comprises the following steps:

[0031] S1. Select and install a matching base plate according to the shape and size of the electromagnetic coil to be wound;

[0032] S2. Fix the copper wire end and adjust the initial position of the fan-shaped pressing block according to the shape and size of the electromagnetic coil;

[0033] S3. Start the servo motor to drive the rotating platform to rotate at a set speed and start winding the electromagnetic coil. At the same time, the pressing block driving assembly drives the fan-shaped pressing block to move radially outward from the initial position, and applies a pressing force to the wound part through the gasket.

[0034] In a preferred embodiment of the present invention, in said S2, when the sector-shaped pressing block is located at the initial position, the outer end thereof is aligned with the edge of the base plate.

[0035] In a preferred embodiment of the present invention, in S3, the radial displacement of the sector-shaped pressing block is controlled as follows:

[0036] When winding the nth turn of coil, the outer end of the sector-shaped pressing block corresponds to the outer radius of the n-1 or n-2 turns of coil before pressing;

[0037] The displacement of the sector pressing block: , where w is the width of each turn of the coil, when k=1, the first n-1 turns are suppressed, or when k=2, the first n-2 turns are suppressed.

[0038] In a preferred embodiment of the present invention, in S3, the feed rate and time control of the micro electric cylinder includes:

[0039] Step timing: The micro-electric cylinder is driven between turns, and the winding time of the nth turn is: , when the spindle encoder feedback angle When one turn is completed, the micro electric cylinder is triggered to drive;

[0040] Drive speed: step distance ;

[0041] Moving time window : .

[0042] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0043] This invention provides an electromagnetic winding device for electronic products. This device uses a rotating platform to precisely wind electromagnetic coils. It also uses a retractable pressure ring and gaskets to apply pressure to the wound electromagnetic coils, maintaining flatness and consistency while preventing damage to the copper wire surface. This device addresses the existing problem of single-layer, planar, hollow electromagnetic coils, which are prone to warping, collapse, or uneven turn spacing due to internal stress release or external disturbances during winding, seriously affecting the coil's flatness and electrical consistency.

[0044] The present invention provides an electromagnetic winding device for electronic products, in which a whole gasket is arranged between a sector-shaped pressing block and a coil winding area. During the winding process of the electromagnetic coil, the sector-shaped pressing block is synchronously displaced to apply a pressing force to the wound electromagnetic coil. The gasket protects the wound electromagnetic coil and prevents the sector-shaped pressing block from directly contacting the wound electromagnetic coil when displaced, thereby causing problems such as scratches, distortion, and tension changes on the copper wire surface.

[0045] There is no fan-shaped pressing block above the gasket area in the relaxed state of the present invention. The gasket in this area is in a raised state, and there is enough gap with the coil winding area to allow the copper wire to pass smoothly, avoiding wire jamming, friction and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] 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 described in the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0047] Figure 1 It is a schematic diagram of a single-layer hollow coil;

[0048] Figure 2 Schematic diagram of an electromagnetic winding device according to a preferred embodiment 1 of the present invention;

[0049] Figure 3 1 is a three-dimensional structural diagram of a winding mechanism according to a preferred embodiment 1 of the present invention;

[0050] Figure 4 1 is a three-dimensional structural diagram of a pressing block driving assembly according to a preferred embodiment 1 of the present invention;

[0051] Figure 5 3D diagram of the fan-shaped pressing block according to the preferred embodiment 1 of the present invention;

[0052] Figure 6 2. It is a bottom view of the telescopic pressure ring of the preferred embodiment 1 of the present invention;

[0053] Figure 7 1 is a top view of the telescopic pressure ring and the linkage member of the preferred embodiment 2 of the present invention;

[0054] Figure 8 is a flow chart of a method for winding an electromagnetic coil according to a preferred embodiment 3 of the present invention;

[0055] In the figure: 1. Pay-off frame; 2. Guide frame; 3. Winding mechanism; 31. Rotating platform; 32. Servo motor; 33. Gasket; 34. Telescopic pressure ring; 35. Pressure block drive assembly; 36. Guide rail frame; 311. Movable platform; 312. Fixed platform; 341. Fan-shaped pressure block; 342. Slider; 343. Limiting groove; 351. Micro electric cylinder; 352. Linkage; 353. Connecting rod; 361. Guide groove; 362. Limiting rod. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0057] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0058] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as limiting the scope of protection of this application.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0060] Figure 1 A schematic diagram of a single-layer planar hollow electromagnetic coil is shown. This type of electromagnetic coil has no magnetic core and is single-layer. As the number of coil turns increases, automated winding becomes increasingly difficult. To ensure the flatness and consistency of the wound coil, the present invention provides an electromagnetic winding device and winding method for electronic products, which resolves the contradiction between pressing and feeding during the winding process, ensures the shape consistency of the single-layer planar hollow coil, and avoids damage to the copper wire.

[0061] It should be noted that unevenness during coil winding can cause local wire twisting and bulging, which can easily lead to various problems with the coil: first, the coil thickness may exceed the standard, or require subsequent finishing; second, it can lead to uneven spacing between coil turns, deviation of inductance from the design value, and uneven distributed capacitance between turns, increasing high-frequency eddy current losses and reducing the Q value. If enameled wire is used to wind the coil, the insulation layer of the enameled wire has a certain degree of elasticity and viscosity. When the wire is tightly wound, adjacent turns will be squeezed against each other due to mechanical pressure, causing slight deformation of the insulation layer and forming a weak mechanical fit between the turns to maintain the coil shape. If local wire twisting and bulging occur during the enameled wire winding process, if not handled in a timely manner, the enameled wire's ability to maintain its shape will cause resistance during the subsequent finishing process, which is time-consuming and labor-intensive, and the coil winding efficiency is low.

[0062] Example 1:

[0063] like Figure 2 As shown, the present invention provides an electromagnetic winding device for electronic products, comprising a pay-off frame 1, a guide frame 2, and a winding mechanism 3, which are arranged in sequence. The pay-off frame 1 is provided with a pay-off reel; the guide frame 2 is provided with a clamping roller frame, and the clamping roller frame is provided with a pair of horizontally arranged clamping rollers.

[0064] The payout frame 1 is equipped with a vertically mounted payout reel for winding the wire. The reel is wound around the wire and released by rotating the axis. A tension sensor and an automatic adjustment mechanism (friction clutch or servo drive) are connected to the bottom of the payout reel. This mechanism monitors the wire tension in real time and dynamically adjusts the payout speed to prevent wire breakage due to excessive tension or loose coils due to insufficient tension. After passing through the guide frame 2, the wire on the payout reel is wound by the winding mechanism 3 into a single-layer, planar, hollow electromagnetic coil.

[0065] The guide frame 2 is located between the pay-off frame 1 and the winding mechanism 3. Its main function is to guide the wire into the winding area along a predetermined path and ensure that the wire maintains stable tension and direction during the winding process. The clamping roller frame consists of a pair of horizontally arranged clamping rollers. The roller surface is covered with rubber or polyurethane coating to reduce the friction coefficient between the wire and the roller and reduce the risk of scratches. The distance between the two rollers can be adjusted by motor drive to accommodate wires of different diameters. The surface of the clamping roller is provided with an arc-shaped guide groove, which matches the rotation trajectory of the rotating platform 31 to ensure that the wire is aligned with the edge of the base disk when entering the winding area to avoid deviation.

[0066] It should be noted that the wire is preferably enameled wire, which does not require additional insulation treatment after winding, and the coil is directly fixed by self-adhesion of the paint layer.

[0067] The winding mechanism 3 in this embodiment includes: a rotating platform 31 , a servo motor 32 , a base plate, a telescopic pressure ring 34 and a pressure block driving assembly 35 .

[0068] The rotating platform 31 comprises a rotatable movable platform 311 and a fixed platform 312 radially outward of the movable platform 311. A vertical servo motor 32 is located at the center of the movable platform 311, i.e., the bottom surface of the rotating platform 31. The servo motor 32 drives the rotating platform 31 to rotate horizontally in either a clockwise or counterclockwise direction at any angle.

[0069] The base plate adopts a modular structure and is mounted at the center of the upper surface of the rotating platform 31 using threads, clips, pins, etc. It rotates as the rotating platform 31 rotates. The base plate adapts to the inner diameter of the electromagnetic coil to be wound, and can be in various shapes and sizes, such as circular, rectangular, and polygonal. It is used to fix the inner diameter of the electromagnetic coil. The base plate has a thickness that matches the electromagnetic coil to be wound.

[0070] The telescopic pressure ring 34 is arranged on the upper part of the base plate and is composed of multiple independent fan-shaped pressure blocks 341, covering the winding area of ​​the electromagnetic coil; the telescopic pressure ring 34 ensures the flatness of the coil and the consistency of the turn spacing by dynamically pressing the wound wire.

[0071] Specifically, the telescopic pressure ring 34 is composed of 6-12 independent sector-shaped pressure blocks 341. Each sector-shaped pressure block 341 is driven by a pressure block driving assembly 35. The number and distribution angle of the sector-shaped pressure blocks 341 are dynamically adjusted according to the shape of the base plate. For example:

[0072] Circular base: The sector-shaped pressing blocks 341 are evenly distributed 360°, and the centerline spacing between adjacent sector-shaped pressing blocks 341 is 30° to 60°;

[0073] Quasi-rectangular base plate: The sector-shaped pressing blocks 341 are concentrated in the long side direction, and the number in the short side direction is reduced to avoid stress concentration.

[0074] Furthermore, a number of elastic bands are arranged between adjacent fan-shaped pressure blocks 341, and the two ends of the elastic bands are respectively connected to the side walls of adjacent fan-shaped pressure blocks 341. As the fan-shaped pressure blocks 341 move radially outward, the distance between adjacent fan-shaped pressure blocks 341 becomes larger and larger, indicating that the actual pressing area of ​​the entire telescopic pressure ring 34 is gradually decreasing. The setting of the elastic band makes the elastic band tighter as the distance between adjacent fan-shaped pressure blocks 341 becomes larger and larger, and the lower surface of the elastic band is flush with the lower surface of the fan-shaped pressure block 341, providing pressing force for the area of ​​the gasket 33 that the fan-shaped pressure block 341 does not contact.

[0075] Furthermore, a guide rail 36 is disposed above the telescopic pressure ring 34 and is detachably connected to the base plate. The surface of the guide rail 36 is provided with a plurality of guide grooves 361, each corresponding to a sector-shaped pressure block 341. A slider 342 is disposed on the upper surface of each sector-shaped pressure block 341 and slidably engages within the corresponding guide groove 361. This restricts radial outward movement of the sector-shaped pressure block 341 to axial movement only along the guide groove 361, preventing it from deviating in any other direction.

[0076] The pressure block drive assembly 35 in this embodiment is used to synchronously drive each sector-shaped pressure block 341 to move radially outward from the center of the base plate. The pressure block drive assembly 35 includes several micro-electric cylinders 351. The output end of each micro-electric cylinder 351 is fixedly connected to a sector-shaped pressure block 341, independently driving the displacement of the sector-shaped pressure block 341.

[0077] If the base is large in size, several micro-electric cylinders 351 are installed on the base in a circular array, with their output ends facing outward and connected to the fan-shaped pressure blocks 341. Through servo closed-loop control, all fan-shaped pressure blocks 341 are driven (extended) to move synchronously, covering the gasket 33 above the wound electromagnetic coil, applying a pressing force to the wound electromagnetic coil to keep it flat.

[0078] If the base is small in size, several micro-electric cylinders 351 are installed in a circular array on the guide rail frame 36, and their output ends are connected to the fan-shaped pressure blocks 341 toward the center of the base. Through servo closed-loop control, all fan-shaped pressure blocks 341 are driven (recovered) to move synchronously, covering the gasket 33 above the wound electromagnetic coil, applying a pressing force to the wound electromagnetic coil to keep it flat.

[0079] A gasket 33 is provided between the telescopic pressure ring 34 and the base in this embodiment. The shape of the gasket 33 is similar to that of the electromagnetic coil, but slightly larger than the size of the electromagnetic coil. A mounting hole is provided at the center of the gasket 33 for mounting the gasket 33 between the guide rail frame 36 and the base. Furthermore, the gasket 33 is mounted between the telescopic pressure ring 34 and the base. The gasket 33 is made of silicone, polyurethane or memory metal material. In its normal state, that is, in a relaxed state, it is in the shape of a bowl with naturally raised edges, forming a wire entry gap of 1mm to 5mm, allowing the wire to pass smoothly. When the fan-shaped pressure block 341 moves radially outward, the gasket 33 is flattened and contacts the wound electromagnetic coil, applying uniform pressure to keep it flat.

[0080] Furthermore, the lower surface of the guide rail frame 36 corresponding to the telescopic pressure ring 34 is provided with several The limiting rod 362, the number of the limiting rod 362 is consistent with the sector-shaped pressure block 341, and the surface of the sector-shaped pressure block 341 is provided with a limiting groove 343, the limiting groove 343 is coaxial with the outward radial movement path of the sector-shaped pressure block 341, the limiting rod 362 passes through the limiting groove 343, and the circumferential surface of the limiting rod 362 is slidably connected to the inner wall of the limiting groove 343.

[0081] It is worth noting that the length of the limiting rod 362 is greater than the thickness of the fan-shaped pressure block 341. A mounting hole is opened on the surface of the gasket 33 at a position corresponding to the limiting rod 362. The lower end of the limiting rod 362 is inserted into the mounting hole. The lower end of the limiting rod 362 abuts against the upper surface of the base plate, which is used to fix the gasket 33 so that it rotates with the rotating platform 31.

[0082] The present invention provides an electromagnetic winding device for electronic products, in which a whole gasket 33 is arranged between a fan-shaped pressure block 341 and the coil winding area. During the winding process of the electromagnetic coil, the fan-shaped pressure block 341 is synchronously displaced outward to apply a pressing force to the wound electromagnetic coil. Among them, the gasket 33 protects the wound electromagnetic coil and prevents the fan-shaped pressure block 341 from directly contacting the wound electromagnetic coil when it is displaced, thereby causing problems such as scratches, twisting, and tension changes on the wire surface.

[0083] There is no fan-shaped pressing block 341 above the area of ​​the gasket 33 in the relaxed state. The gasket 33 in this area is in a tilted state, and there is enough space between it and the coil winding area to allow the wire to pass smoothly and avoid wire jamming, friction, etc.

[0084] Example 2:

[0085] An electromagnetic winding device for electronic products comprises a pay-off frame 1, a guide frame and a winding mechanism 3 arranged in sequence. The winding mechanism 3 comprises a rotating platform 31, a servo motor 32, a base plate, a telescopic pressure ring 34 and a pressure block driving assembly 35.

[0086] The rotating platform 31 comprises a rotatable movable platform 311 and a fixed platform 312 radially outward of the movable platform 311. A vertical servo motor 32 is mounted at the center of the movable platform 311 (i.e., the bottom surface of the rotating platform 31) to drive the rotating platform 31. The servo motor 32 drives the rotating platform 31 to rotate horizontally in either a clockwise or counterclockwise direction at any angle.

[0087] The base adopts a modular structure and is installed at the center of the upper surface of the rotating platform 31 by means of threads, clips, pins, etc. It rotates as the rotating platform 31 rotates. The base adapts to the inner diameter shape of the electromagnetic coil, including different shapes and sizes such as circular, rectangular, and polygonal, and is used to fix the inner diameter shape of the electromagnetic coil.

[0088] The telescopic pressure ring 34 is located on the top surface of the base plate and consists of multiple independent sector-shaped pressure blocks 341, covering the winding area of ​​the electromagnetic coil. The telescopic pressure ring 34 dynamically compresses the wound enameled wire to ensure coil flatness and consistent turn spacing. Specifically, the telescopic pressure ring 34 consists of 6-12 independent sector-shaped pressure blocks 341, each driven by a pressure block drive assembly 35.

[0089] Furthermore, adjacent sector-shaped pressing blocks 341 are provided with several The elastic band has two ends connected to the side walls of adjacent sector-shaped pressing blocks 341. As the sector-shaped pressing blocks 341 move radially outward, the distance between adjacent sector-shaped pressing blocks 341 becomes larger and larger, indicating that the actual pressing area of ​​the entire telescopic pressing ring 34 is gradually decreasing. The setting of the elastic band makes the elastic band tighter as the distance between adjacent sector-shaped pressing blocks 341 becomes larger and larger, and the lower surface of the elastic band is flush with the lower surface of the sector-shaped pressing blocks 341, providing pressing force for the area of ​​the gasket 33 that is not contacted by the sector-shaped pressing blocks 341.

[0090] Furthermore, a guide rail 36 is disposed above the telescopic pressure ring 34 and is detachably connected to the base plate. The lower surface of the guide rail 36 is provided with a plurality of guide grooves 361, each corresponding to a sector-shaped pressure block 341. A slider 342 is disposed on the upper surface of each sector-shaped pressure block 341, and the slider 342 is slidably connected to the corresponding guide groove 361. This ensures that when the sector-shaped pressure blocks 341 move radially outward, they can only move axially along the guide groove 361, without deflecting in any other direction.

[0091] like Figure 7As shown, the pressure block drive assembly 35 in this embodiment is used to synchronously drive each sector-shaped pressure block 341 to move radially outward from the center of the base plate. The pressure block drive assembly 35 comprises several micro-electric cylinders 351, each with a linkage 352 at its output end, which is a curved strip-shaped structural plate; and several connecting rods 353, each connected to a sector-shaped pressure block 341 at its other end. Through the linkages 352 and connecting rods 353, one micro-electric cylinder 351 drives the synchronous displacement of multiple sector-shaped pressure blocks 341.

[0092] Compared to Example 1, this embodiment utilizes fewer micro-electric cylinders 351, employing a single micro-electric cylinder 351 to drive the displacement of multiple sector-shaped pressure blocks 341. A linkage member 352 is fixedly connected to the micro-electric cylinder 351. The linkage member 352 is a curved, strip-shaped structural plate, with at least two connecting rods 353 positioned at each end. The other ends of the connecting rods 353 are rotatably connected to the corresponding sector-shaped pressure blocks 341. The micro-electric cylinder 351 drives the linkage member 352 to extend or retract, enabling the displacement of at least two sector-shaped pressure blocks 341 using a single micro-electric cylinder 351.

[0093] If the base is large in size, several micro-electric cylinders 351 are installed on the base in a circular array, with their output ends facing outward and connected to the fan-shaped pressure blocks 341. Through servo closed-loop control, all fan-shaped pressure blocks 341 are driven (extended) to move synchronously, covering the gasket 33 above the wound electromagnetic coil, and applying a pressing force to the wound electromagnetic coil.

[0094] If the base plate is of small size, several micro electric cylinders 351 are installed in a circular array on the guide rail frame 36, and their output ends are connected to the fan-shaped pressure blocks 341 toward the center of the circle. Through servo closed-loop control, all fan-shaped pressure blocks 341 are driven (recovered) to move synchronously, covering the gasket 33 above the wound electromagnetic coil, and applying a pressing force to the wound electromagnetic coil.

[0095] In this embodiment, a gasket 33 is provided between the telescopic pressure ring 34 and the base. The shape of the gasket 33 is similar to that of the electromagnetic coil, but slightly larger than the size of the electromagnetic coil. A mounting hole is provided at the center of the gasket 33 for mounting the gasket 33 between the guide rail frame 36 and the base. Furthermore, the gasket 33 is mounted between the telescopic pressure ring 34 and the base. The gasket 33 is made of silicone, polyurethane or memory metal material. In its normal state, that is, in a relaxed state, it is in the shape of a bowl with naturally raised edges, forming a wire entry gap of 1mm to 5mm, allowing the wire to pass smoothly. When the fan-shaped pressure block 341 moves radially outward, the gasket 33 is flattened and contacts the wound electromagnetic coil, exerting uniform pressure.

[0096] The distance between the lower surface of the gasket 33 in a tightened state and the upper surface of the rotating platform 31 is adjusted according to the thickness of the electromagnetic coil.

[0097] The present invention provides an electromagnetic winding device for electronic products. This device utilizes a rotating platform 31 to precisely wind electromagnetic coils. A retractable pressure ring 34 and a gasket 33 simultaneously apply a compressive force to the wound electromagnetic coils, maintaining flatness and consistency while preventing surface damage. This device addresses the existing problem of single-layer, planar, hollow electromagnetic coils, which are prone to warping, collapse, or uneven turn spacing due to internal stress release or external disturbances during winding, seriously affecting the coil's flatness and electrical consistency.

[0098] Example 3:

[0099] like Figure 8 As shown, the present invention also provides a method for winding an electromagnetic coil, using an electromagnetic winding device for an electronic product of embodiment 1 or embodiment 2, the winding method includes the following steps:

[0100] Step S1: Select and install a matching base plate according to the shape and size of the electromagnetic coil to be wound; wherein, the base plate is selected according to the inner contour of the electromagnetic coil to be wound, and the outer diameter of the base plate is consistent with the inner diameter of the coil.

[0101] Step S2: Fix the head end of the wire and adjust the initial position of the fan-shaped pressure block according to the shape and size of the electromagnetic coil; wherein, the method for fixing the head end of the wire is that the wire passes through the clamping roller of the guide frame, and the head end is fixed to the starting point of the edge of the base plate with a detachable clamp; when the fan-shaped pressure block is in the initial position, its outer end is aligned with the edge of the base plate.

[0102] Step S3: Start the servo motor to drive the rotating platform to rotate at a set speed and start winding the electromagnetic coil. At the same time, the pressing block driving assembly drives the sector-shaped pressing block to move radially outward from the initial position, and applies a pressing force to the wound part through the gasket.

[0103] Among them, the radial displacement of the sector-shaped pressing block is controlled as follows:

[0104] When winding the nth turn of coil, the outer end of the sector pressing block corresponds to the outer radius of the n-1 or n-2 turns of coil before pressing; the displacement of the sector pressing block is: , where w is the width of each turn of the coil, when k=1, the first n-1 turns are suppressed, or when k=2, the first n-2 turns are suppressed.

[0105] When k=1:

[0106] n=1: D1=0 (the briquette is completely shrunk, no compression);

[0107] n=2: D2=w (suppress the first turn).

[0108] When k=2:

[0109] n=1: D1=0 (the briquette is completely shrunk, no compression);

[0110] n=2: D2=0 (the briquette is completely contracted, no compression);

[0111] n=3: D3=w (suppress the first turn).

[0112] After completing the nth turn, the push rod of the micro cylinder moves to the next position D n+1 : .

[0113] Furthermore, the feed rate and time control of the micro electric cylinder:

[0114] Step timing: The micro-electric cylinder is driven between turns, and the winding time of the nth turn is: ,in, The single-turn winding cycle indicates the time required to wind one coil. When the spindle encoder feedback angle When one turn is completed, the micro electric cylinder is triggered to drive.

[0115] Drive speed: step distance ; Moving time window : .

[0116] As described above, the present invention provides a method for winding an electromagnetic coil. This method utilizes a rotating platform to achieve precise coil winding. A retractable pressure ring and gasket simultaneously apply a compressive force to the wound coil to maintain flatness and consistency while preventing surface damage. This method addresses the prior art problem of single-layer, planar, hollow electromagnetic coils, which are susceptible to warping, collapse, or uneven turn spacing due to internal stress release or external disturbances, seriously affecting the coil's flatness and electrical consistency.

[0117] This electromagnetic coil winding method ensures consistent coil inner diameters through a base plate matching design. Combined with dynamic pressing control (supporting both k=1 conventional mode and k=2 high-precision mode), it offers flexible adaptation to various scenarios. The gasket protection mechanism works in tandem with the radial wire feed to ensure zero wire damage during the pressing process while also preventing wire jamming and friction.

[0118] Its efficient synchronous control system triggers the micro electric cylinder action through the spindle encoder to Precise step-by-step pressing. The modular base plate allows for rapid switching between rectangular and circular coils, while adjustable pressing parameters further enhance adaptability. This method improves the yield and efficiency of winding single-layer planar hollow electromagnetic coils, making it particularly suitable for mass production of RFID, medical sensor coils (k=2 mode), and wireless charging modules.

[0119] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. An electromagnetic winding device for electronic products, comprising a pay-off frame, a guide frame and a winding mechanism arranged in sequence, characterized in that: The winding mechanism comprises: Rotating platform; A servo motor is provided at the lower portion of the rotating platform, and is used to drive the rotating platform to rotate horizontally in a clockwise or counterclockwise direction; A base plate is provided on the upper surface of the rotating platform, and the base plate is adapted to the inner diameter shape of the electromagnetic coil; The telescopic pressure ring is arranged on the upper part of the base plate and is composed of a plurality of independent sector-shaped pressure blocks, covering the winding area of ​​the electromagnetic coil; and a pressing block driving assembly for driving each of the sector-shaped pressing blocks to move radially outward from the center of the base plate; A gasket is provided between the telescopic pressure ring and the base plate. The edge of the gasket naturally rises in a relaxed state, and its surface contacts the wound electromagnetic coil in a tightened state. A guide rail frame is provided above the telescopic pressure ring, and the guide rail frame is detachably connected to the base plate; a plurality of guide grooves are provided on the surface of the guide rail frame, each of which corresponds to a sector-shaped pressure block, and a slider is provided on the upper surface of the corresponding sector-shaped pressure block, and the slider is slidably connected to the inside of the corresponding guide groove; The guide rail frame is provided with a limit rod corresponding to the lower surface of the telescopic pressure ring, the number of the limit rods is consistent with the sector-shaped pressure block, and the surface of the sector-shaped pressure block is provided with a limit groove, the limit groove is coaxial with the outward radial movement path of the sector-shaped pressure block, the limit rod passes through the limit groove, and the circumferential surface of the limit rod is slidably connected to the inner wall of the limit groove; The length of the limiting rod is greater than the thickness of the sector-shaped pressure block, and a mounting hole is opened at a position on the surface of the gasket corresponding to the position of the limiting rod. The lower end of the limiting rod is inserted into the mounting hole, and the lower end of the limiting rod abuts against the upper surface of the base plate; An elastic band is provided between adjacent sector-shaped pressing blocks, and both ends of the elastic band are respectively connected to the side walls of the adjacent sector-shaped pressing blocks; the lower surface of the elastic band is flush with the lower surface of the sector-shaped pressing blocks.

2. The electromagnetic winding device for electronic products according to claim 1, characterized in that: The gasket is made of silica gel, polyurethane or memory metal material.

3. The electromagnetic winding device for electronic products according to claim 1, characterized in that: The base plate is adapted to the inner diameter shape of the electromagnetic coil to be wound, including circular, rectangular or polygonal.

4. The electromagnetic winding device for electronic products according to claim 1, characterized in that: The pressing block driving assembly includes: a micro electric cylinder, the output end of which is fixedly connected to the sector-shaped pressing block and independently drives the sector-shaped pressing block to move.

5. The electromagnetic winding device for electronic products according to claim 1, characterized in that: The pressing block driving assembly comprises: A micro electric cylinder, wherein the output end of the micro electric cylinder is provided with a linkage member; Connecting rods are provided at both ends of the linkage member, and the other ends of the connecting rods are connected to one of the sector-shaped pressing blocks; Wherein, the micro electric cylinder drives the plurality of sector-shaped pressing blocks to move synchronously through the linkage member and the connecting rod.

6. A method for winding an electromagnetic coil, based on the electromagnetic winding device for an electronic product according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Select and install a matching base plate according to the shape and size of the electromagnetic coil to be wound; S2. Fix the copper wire end and adjust the initial position of the fan-shaped pressing block according to the shape and size of the electromagnetic coil. The gasket is in a relaxed state. S3. Start the servo motor to drive the rotating platform to rotate at a set speed and start winding the electromagnetic coil. At the same time, the pressing block driving assembly drives the fan-shaped pressing block to move radially outward from the initial position, and applies a pressing force to the wound part through the gasket.

7. The electromagnetic coil winding method according to claim 6, characterized in that: In the step S2, when the sector-shaped pressing block is located at the initial position, the outer end thereof is aligned with the edge of the base plate.

8. The electromagnetic coil winding method according to claim 6, characterized in that: In S3, the radial displacement of the sector-shaped pressing block is controlled as follows: When winding the nth turn of coil, the outer end of the sector-shaped pressing block corresponds to the outer radius of the n-1 or n-2 turns of coil before pressing; The displacement of the sector pressing block: , where w is the width of each turn of the coil, when k=1, the first n-1 turns are suppressed, or when k=2, the first n-2 turns are suppressed.

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