Pressing mechanism and application of pressing magnetorheological coarse sheet

Abstract

The application provides a pressing mechanism and application of the pressing mechanism for rough sheets of gyromagnetic ferrite, relates to the technical field of automatic assembly of gyromagnetic ferrite devices, and comprises a base, a rotary table driving part mounted on the base and a rotary table intermittently rotating under the driving of the rotary table driving part, a plurality of jigs are arranged on the rotary table along the axis of the rotary table, a ring body loading assembly, a glue throwing assembly, a rough sheet loading assembly and a combined body unloading assembly are sequentially arranged on the periphery of the rotary table, the rough sheet loading assembly is provided with a pressing assembly, and the pressing assembly is used for adsorbing the rough sheet and loading the rough sheet into the ring body. Through the multi-station linkage mode of the rotary table, the ring body loading, the glue throwing, the rough sheet loading and the combined body unloading are arranged in the process sequence on the periphery of the rotary table, the intermittent rotation of the rotary table is matched, each jig sequentially passes through each station, the full-automatic continuous production of the pressing operation of the gyromagnetic ferrite device is realized, the production efficiency is significantly improved, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of automated assembly technology for ferromagnetic ferrite devices, and particularly to a pressing mechanism and its application in pressing ferromagnetic ferrite sheets. Background Technology

[0002] Rotary ferrite magnets are key components in microwave communications, radar systems, satellite communications, and other fields, and their assembly quality directly determines the performance and reliability of the product. In the manufacturing and assembly process of such devices, coarse rotary ferrite sheets are typically fitted into corresponding rings, and a stable connection is formed between them using a binder or a specific fluid.

[0003] Currently, this assembly process mainly relies on manual labor using tweezers to hold the coarse sheet and press it into the ring body. Then, the tiny gap between the coarse sheet and the ring body is manually filled with adhesive or fluid. However, this manual pressing method has significant quality defects: Firstly, when manually clamping and pressing the coarse sheet, it is difficult to maintain a consistent feel and pressure, which can easily lead to a height difference between the coarse sheet and the ring, resulting in poor assembly consistency and inconsistent product parameters. Secondly, the manual filling operation of adhesives or fluids is not regular, and some adhesives or fluids are easily spilled on the surface of the ring or coarse sheet, causing problems such as uneven product surface and poor cleanliness. Third, manual assembly is inefficient and cannot meet the needs of large-scale production, and the fatigue level of operators directly affects the product yield.

[0004] In summary, there is an urgent need to develop a fully automated pressing mechanism to solve the technical problems of poor consistency, low cleanliness, and low efficiency in existing manual assembly processes. Summary of the Invention

[0005] The purpose of this invention is to provide a pressing mechanism and its application in pressing spin magnetite ferrite sheets, thereby achieving automated pressing of spin magnetite ferrite sheets and rings, improving assembly consistency and product cleanliness, and significantly increasing production efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The pressing mechanism includes a base, a turntable drive unit mounted on the base, and a turntable that is driven to rotate intermittently. Several fixtures are provided on the turntable along its axis. A ring feeding assembly, a glue-spinning assembly, a coarse sheet feeding assembly, and a combined unloading assembly are arranged in sequence around the turntable. The coarse sheet feeding assembly is equipped with a pressing assembly. The pressing assembly is used to adsorb the coarse sheet and load it into the ring body. During the pressing process, the coarse sheet is driven to perform axial reciprocating motion and combined with rotation within the ring body.

[0007] Preferably, a groove is provided on the vertical line of the midpoint of the shortest connecting line between adjacent fixtures, and a limiter is installed on the base. The limiter has a controllable telescopic pin, and the shape of the pin end matches the groove.

[0008] Preferably, the top of the fixture has a strip groove, and the center of the strip groove has an arc groove extending to two groove walls. The two arc grooves face each other and together with the strip groove form a receiving space for fitting the ring.

[0009] Preferably, the ring-shaped feeding assembly includes a first multi-axis motion part bracket, a first multi-axis motion part mounted on the first multi-axis motion part bracket, a first clamp mounted on the conveying end of the first multi-axis motion part, and also includes a first material rail bracket, a first material rail fixed on the first material rail bracket, and a first material platform fixed on the first material rail bracket. The top of the first material platform is provided with a T-shaped groove communicating with the first material rail.

[0010] Preferably, the slinging assembly includes a linear motion part bracket, a linear motion part mounted on the linear motion part bracket, and a mounting base driven by the linear motion part to move up and down. The mounting base is equipped with a motor with its drive end facing down on its side, and the drive end of the motor is connected to a slinging disc with an outer diameter smaller than the inner diameter of the ring. The material throwing disc is a cup-shaped structure with several through holes on its side wall. A glue pump is also installed on the mounting base. The glue pump delivers glue or fluid to the material throwing disc through a glue tube.

[0011] Preferably, the coarse sheet feeding assembly includes a second multi-axis motion part bracket and a second multi-axis motion part mounted on the second multi-axis motion part bracket, and the pressing assembly is mounted on the conveying end of the second multi-axis motion part; It also includes a second material rail bracket, a second material rail fixed on the second material rail bracket, and a second material platform fixed by a second material platform bracket. The top of the second material platform is provided with a T-shaped groove communicating with the second material rail, and a rotatable platform is embedded in the T-shaped groove.

[0012] Preferably, the pressing assembly includes a first sleeve fixedly connected to the conveying end of the coarse sheet feeding assembly. A second sleeve and a third sleeve are coaxially arranged at intervals within the first sleeve. A ratchet is provided in the interval area between the second sleeve and the third sleeve. A bearing is installed inside the third sleeve, and the central extension of the ratchet is inserted into the bearing. The ratchet has a limiting channel at its center, and a limiting rod that can slide relative to the ratchet is installed in the channel. The limiting rod passes through the end of the first sleeve and extends outward. A torsion spring is installed in the third sleeve. One end of the torsion spring is fixedly connected to the end of the first sleeve, and the other end is connected to the central extension of the ratchet.

[0013] Preferably, the second sleeve is provided with a main shaft, the outer wall of the main shaft is provided with a spiral groove, the inner wall of the second sleeve is provided with a pin that extends into the spiral groove, and the end of the limiting rod located inside the tube is fixedly connected to the main shaft; the limiting rod is provided with a pipeline for connecting to a negative pressure system, and a suction cup is installed at the end of the main shaft that extends outward.

[0014] Preferably, the first sleeve is further provided with a push rod, which is located in the interlayer between the second sleeve and the first sleeve. A push rod limiting sleeve is installed in the interlayer, and the push rod extends out from the bottom of the first sleeve and forms a height difference with the suction cup. The part of the push rod located in the interlayer is provided with a push rod extension. A spring is also sleeved on the push rod, and the two ends of the spring are fixedly connected to the push rod extension and the push rod limiting sleeve, respectively. The inner wall of the first sleeve is provided with a rotatable pawl, which engages in the outer tooth groove of the ratchet to restrict the ratchet from rotating in the opposite direction; the push rod has a tapered portion that extends from the push rod limiting sleeve to the lateral position of the pawl.

[0015] The beneficial effects of this invention are: 1. This invention uses a multi-station turntable linkage to arrange the ring feeding, glue spinning, coarse sheet feeding and assembly unloading in the process sequence on the outer periphery of the turntable. With the intermittent rotation of the turntable, each fixture passes through each station in sequence, realizing fully automated continuous production of rotary magnetic ferrite device pressing operation, significantly improving production efficiency and reducing labor costs.

[0016] 2. The press-fit assembly utilizes the spiral groove on the outer wall of the spindle and the engagement of the pin to convert the axial motion of the downward movement of the adsorbed coarse piece into a synchronous action of rotation and sliding. This action is used to store energy in the torsion spring, and after energy storage, it is locked in one direction by the chuck. After the coarse piece enters the ring body, the chuck is released by the push rod, and the torsion spring releases kinetic energy to drive the coarse piece to slide back and forth in the ring body and rotate in both directions. This evenly distributes the adhesive or fluid thrown into the inner wall of the ring body into the gap between the ring body and the coarse piece, significantly improving the connection strength and assembly consistency. Attached Figure Description

[0017] Figure 1 This includes a structural diagram of the pressing mechanism and enlarged views of some of its components; Figure 2 for Figure 1 Top view of the mechanism shown; Figure 3 This is a schematic diagram of the feeding assembly used to transfer the ring body onto the fixture. Figure 4 This is a schematic diagram of the spunbond assembly. Figure 5 A schematic diagram of the gripping assembly used during the unloading of the assembly; Figure 6A schematic diagram of the feeding and pressing components used to transfer the rough sheet onto the fixture; Figure 7 This is a cross-sectional view of the press-fit assembly; Reference numerals: 1. Base; 2. Turntable drive unit; 3. Turntable; 4. Fixture; 5. Ring body feeding assembly; 6. Glue-spinning assembly; 7. Coarse sheet feeding assembly; 8. Assembly unloading assembly; 9. Pressing assembly; 10. Groove; 11. Limiter; 100. Ring body; 200. Coarse sheet; 51. First multi-axis motion unit support; 52. First multi-axis motion unit; 53. First material platform support; 54. First material platform; 55. First material rail support; 56. First material rail; 57. First clamp; 61. Linear motion unit support; 62. Linear motion unit; 63. Mounting base; 64. Motor; 65. Glue pump; 66. Glue hose; 67. Dispensing tray; 71. Second multi-axis motion unit support; 72. Second multi-axis motion unit; 73. Second material platform support; 74. Second material platform; 75. Second material rail support; 76. Second material rail; 81. Third multi-axis motion unit support; 82. Third multi-axis motion unit; 83. Second clamp; 91. First sleeve; 92. Torsion spring; 93. Ratchet; 94. Main shaft; 95. Helical groove; 96. Second sleeve; 97. Third sleeve; 98. Limiting rod; 99. Pin; 910. Claw; 911. Bearing; 912. Push rod limiting sleeve; 913. Spring; 914. Push rod extension; 915. Suction cup; 916. Push rod. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0020] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0021] Example 1 Please see Figures 1-7This embodiment provides a press-fitting mechanism, which is mainly used in the fully automated assembly process of ferromagnetic ferrite devices to achieve precise press-fitting and connection between the ferromagnetic ferrite sheet 200 and the ring body 100.

[0022] The pressing mechanism uses base 1 as the overall supporting foundation. Base 1 is a frame structure assembled from profiles. A turntable drive unit 2 is installed in the middle of the platform of base 1. In this embodiment, the turntable drive unit 2 is implemented by using a direct drive motor in conjunction with a high-precision encoder. The specific structural form can be selected according to the production cycle and precision requirements, and this invention does not limit it.

[0023] The drive section of the turntable drive unit 2 is positioned upwards, and a circular turntable 3 is horizontally mounted on it. Driven by the turntable drive unit 2, the turntable 3 performs intermittent rotational motion along a preset direction. The intermittent frequency and single rotation angle can be programmed and set by an external PLC control system. In this embodiment, eight fixtures 4 are evenly distributed around the turntable 3. Correspondingly, the turntable 3 rotates 45° each time, meaning that after completing one work cycle, the turntable 3 moves forward one workstation. It should be noted that the number of fixtures 4 is not limited to eight. Those skilled in the art can set it to six, ten, twelve, or other suitable numbers according to the number of workstations and cycle requirements, all without departing from the scope of protection of this invention.

[0024] See Figure 2 As shown, fixture 4 is one of the key components for achieving precise positioning of the ring 100 in this invention. Its top is machined with a strip-shaped groove, and two symmetrical arc-shaped grooves extending towards the two groove walls are located in the center of the strip-shaped groove. These two arc-shaped grooves face each other and, together with the strip-shaped groove, form a receiving space for accommodating the ring 100. The shape of this receiving space is adapted to the outer shape of the ring 100, so that after the ring 100 is installed, it can be radially limited by the arc-shaped groove and circumferentially supported by the strip-shaped groove. This ensures the positional stability of the ring 100 during subsequent glue application and pressing operations, and also facilitates the rapid installation of the ring 100 and the rapid removal of the assembled unit.

[0025] To prevent the turntable 3 from slightly deflecting due to the forces of other workstation components during intermittent pauses, a groove 10 is machined on the side wall of the turntable 3, specifically on the perpendicular line from the midpoint of the shortest connecting line between two adjacent fixtures 4. Correspondingly, a limiter 11 is installed on the base 1 adjacent to the turntable 3. The limiter 11 contains a controllable telescopic pin driven by a cylinder or electromagnetic push rod. The end shape of the pin matches the shape of the groove 10, preferably wedge-shaped or semi-circular, to facilitate a self-centering fit between the pin and the groove 10. During operation, each time the turntable 3 completes a 45° intermittent rotation, the limiter 11 receives a control system command, driving the pin to extend and embed into the nearest groove 10, thus achieving a secondary locking of the turntable 3's stopping position. When the next cycle begins, the pin retracts under a control signal, releasing the lock on the turntable 3. The locking mechanism effectively resists the lateral impact force generated by the pressing component 9 during the pressing process, the glue-spinning component 6 during the lifting process, and the clamp during the clamping process, ensuring the positional accuracy of each workstation.

[0026] Around the turntable 3, along its rotation direction, there are four working components: ring feeding component 5, glue-spinning component 6, coarse sheet feeding component 7, and combined unloading component 8. Empty stations are left between each component as cycle buffers to make the process more stable.

[0027] See Figure 3 As shown, the ring feeding assembly 5 is used to transfer the ring 100 from the vibratory feeder conveying end to the fixture 4, thereby realizing the automated feeding of the ring 100.

[0028] Specifically, the ring-shaped feeding assembly 5 includes a first multi-axis motion unit bracket 51 mounted above the base 1, and a first multi-axis motion unit 52 mounted on the first multi-axis motion unit bracket 51. In this embodiment, the first multi-axis motion unit 52 preferably adopts a three-axis Cartesian coordinate robot structure, that is, it includes three mutually perpendicular linear motion units: the X-axis, the Y-axis, and the Z-axis. Each motion unit is driven by a servo motor in conjunction with a ball screw or synchronous belt drive, which has high positioning accuracy and response speed. A first gripper 57 is installed at the conveying end of the first multi-axis motion unit 52, that is, the lower end of the Z-axis.

[0029] The first clamp 57 is a pneumatic clamp, which consists of two opposing jaws. Driven by an air source, the two jaws can move closer or further apart synchronously to grip and release the ring 100.

[0030] The ring feeding assembly 5 also includes a first material rail bracket 55, which is also installed above the base 1. A first material rail 56 is horizontally fixed on the first material rail bracket 55. The feed end of the first material rail 56 is connected to an external vibratory feeder (not shown in the figure). Several rings 100 stored in the vibratory feeder are orderly fed out under the action of the spiral vibration structure in the vibratory feeder and enter the preset track groove of the first material rail 56 in a straight line arrangement, and are gradually pushed forward along the track groove.

[0031] A first material platform support 53 is also fixed on the first material rail support 55. A first material platform 54 is fixed at the top of the first material platform support 53. A T-shaped groove is machined on the top of the first material platform 54. The T-shaped groove is connected to the track groove in the first material rail 56. The ring 100 located in the first material rail 56 is pushed into the T-shaped groove on the top of the first material platform 54 one by one under the continuous pushing action of the vibrating plate, and stops stably at the end of the T-shaped groove.

[0032] During operation, the first multi-axis motion unit 52 drives the first gripper 57 to move directly above the first material table 54, and then lowers it so that the two grippers of the first gripper 57 extend into the T-slot, closing to clamp the ring 100. Subsequently, the first multi-axis motion unit 52 drives the first gripper 57 upwards, then horizontally to directly above the loading station fixture 4, and then downwards until the ring 100 is accurately placed into the receiving space of the fixture 4. At this point, the grippers of the first gripper 57 release, completing a single loading action. The first multi-axis motion unit 52 drives the first gripper 57 to reset, waiting for the next cycle. This process is repeated continuously to achieve continuous automatic loading of the ring 100.

[0033] See Figure 4 As shown, the spun glue assembly 6 is a key station for achieving uniform distribution of adhesive or specific fluid on the inner wall of the ring 100. Its design goal is to change the traditional dispensing or coating process and adopt a centrifugal spun glue method to uniformly attach a quantitative amount of adhesive in a star-shaped pattern to the upper half of the inner wall of the ring 100.

[0034] The spun glue assembly 6 includes a linear motion unit bracket 61 mounted on a base 1, and a linear motion unit 62 is mounted on the linear motion unit bracket 61. In this embodiment, the linear motion unit 62 preferably adopts a servo electric cylinder or pneumatic cylinder structure, and its driving direction is arranged vertically along the Z-axis. The output end of the linear motion unit 62 is connected to a mounting base 63, which can move up and down along the Z-axis under the drive of the linear motion unit 62.

[0035] A motor 64 is mounted on the side of the mounting base 63, with the drive end of the motor 64 facing downwards. The drive end of the motor 64 is connected to a slinging disc 67 via a coupling or flange. The slinging disc 67 is the core component of this assembly for centrifugal sling coating. Its outer diameter is slightly smaller than the inner diameter of the ring 100 to ensure that it can smoothly enter the ring 100. Specifically, the slinging disc 67 has a cup-shaped structure with the cup opening facing upwards and the cup bottom facing downwards. Several through holes are evenly distributed along the circumference of its side wall. The diameter and number of through holes are designed and selected according to the viscosity of the adhesive and the amount of sling coating per cycle.

[0036] A glue pump 65 is also installed on the mounting base 63. The glue pump 65 is preferably a screw pump or a precision gear pump, which can realize the precise metering supply of glue or specific fluids. The outlet of the glue pump 65 enters the sling plate 67 through the glue tube 66, so that the glue or fluid can be quantitatively and stably delivered into the inner cavity of the sling plate 67.

[0037] It should be noted that the axis of the material-spinning disc 67 is strictly coincident with the axis of the ring 100 assembled on the fixture 4 when it reaches the glue-spinning station. This coaxiality is guaranteed by the unified installation reference of each component.

[0038] During operation, the turntable 3 delivers the fixture 4 containing the ring 100 to the coating station and locks it with the limiter 11. The linear motion unit 62 then drives the mounting base 63 downwards, causing the coating disc 67 to descend synchronously and extend into the inner cavity of the ring 100. Once in position, the glue pump 65 starts, injecting a measured amount of glue or a specific fluid into the coating disc 67 via the glue tube 66. Simultaneously, the motor 64 drives the coating disc 67 to rotate at a preset speed. Under centrifugal force, the glue or fluid within the coating disc 67 is ejected at high speed through several through-holes in the side wall, forming fine, star-shaped dots that evenly adhere to the upper half of the inner wall of the ring 100. After coating is complete, the motor 64 stops, and the linear motion unit 62 drives the mounting base 63 to return to its original position, awaiting the next cycle.

[0039] See Figure 6 As shown, the rough sheet feeding assembly 7 is used to precisely press the rough sheet 200 into the receiving space of the fixture 4 where the ring body 100 is already installed, thereby realizing the precision assembly between the rough sheet 200 and the ring body 100.

[0040] The coarse sheet feeding assembly 7 includes a second multi-axis motion unit bracket 71 mounted above the base 1. A second multi-axis motion unit 72 is mounted on the second multi-axis motion unit bracket 71. The second multi-axis motion unit 72 preferably adopts a three-axis Cartesian coordinate robot structure. A pressing assembly 9 is installed at the conveying end of the second multi-axis motion unit 72. The pressing assembly 9 is one of the core innovations of this invention, and its specific structure will be described in detail later.

[0041] The coarse sheet feeding assembly 7 also includes a second material rail bracket 75, which is also installed above the base 1. A second material rail 76 is fixed on the second material rail bracket 75. The second material rail 76 is connected to another external vibratory feeder (not shown in the figure). Under the vibration of the vibratory feeder, several coarse sheets 200 are arranged in a straight line along a predetermined posture in the track groove of the second material rail 76.

[0042] A second material platform support 73 is also fixed on the second material rail support 75, and a second material platform 74 is fixed to the top of the second material platform support 73. The top of the second material platform 74 is also provided with a T-shaped groove, which is connected to the track groove in the second material rail 76.

[0043] It should be noted that in this embodiment, a rotatable platform is embedded in the T-slot of the second material stage 74. The platform is supported in the T-slot by a deep groove ball bearing or thrust bearing structure and can rotate freely around its own axis. The setting of this rotatable platform is of great significance because during the process of the suction cup 915 of the pressing assembly 9 adsorbing the coarse sheet 200 and making the coarse sheet 200 rotate with the main shaft 94, the coarse sheet 200 maintains no relative friction with its supporting surface, thereby avoiding scratches or wear on the bottom surface of the coarse sheet 200 and effectively protecting the integrity of the surface of the coarse sheet 200. This is of great value for maintaining the electromagnetic performance of the gyromagnetic ferrite device.

[0044] During operation, the coarse sheet 200 is pushed into the T-slot of the second material table 74 by the vibratory feeder and stops on the rotatable platform. The pressing assembly 9 moves to the top of the second material table 74 under the drive of the second multi-axis motion unit 72, and then moves down to the suction cup 915 to cover and adsorb the coarse sheet 200. During this process, the torsion spring 92 in the pressing assembly 9 synchronously completes energy storage. Then the pressing assembly 9 moves up and horizontally to the top of the pressing station fixture 4, and then moves down to perform the pressing action. After the pressing is completed, the pressing assembly 9 resets and waits for the next cycle.

[0045] See Figure 7 As shown, the pressing assembly 9 is the core mechanism of this invention for achieving a uniform and stable connection between the coarse sheet 200 and the ring body 100. The pressing assembly 9 includes a first sleeve 91 fixedly connected to the conveying end of the second multi-axis motion part 72. The first sleeve 91 serves as the overall bearing shell of the pressing assembly 9, and its axis is perpendicular to the horizontal plane of the turntable 3. A second sleeve 96 and a third sleeve 97 are coaxially arranged in the inner cavity of the first sleeve 91. The two are spaced vertically along the axial direction, with the second sleeve 96 located below and the third sleeve 97 located above, forming a gap between them.

[0046] A ratchet 93 is provided in the space between the second sleeve 96 and the third sleeve 97. A bearing 911, preferably a deep groove ball bearing or an angular contact ball bearing, is installed inside the third sleeve 97. The ratchet 93 has an extension extending upward along its axis at its center, which is inserted into the inner ring of the bearing 911. Based on this structure, the ratchet 93 can rotate freely about its axis in the space between the second sleeve 96 and the third sleeve 97.

[0047] A limiting channel is formed along the axis at the center of the ratchet 93. The cross-sectional shape of the limiting channel can be triangular, rectangular, or other polygonal. Its function is to match the cross-sectional shape of the limiting rod 98, allowing the limiting rod 98 to slide axially within the channel, but forming a circumferential synchronization with the ratchet 93. That is, when the limiting rod 98 rotates axially, it will necessarily drive the ratchet 93 to rotate synchronously, and vice versa. The limiting rod 98 is installed inside the limiting channel, and the limiting rod 98 passes through the end of the first sleeve 91 and extends outward. It is important to emphasize that the limiting rod 98 and the ratchet 93 have a circumferentially synchronized and axially sliding fit relationship, which is the key foundation for the compound motion of the press-fitting assembly 9.

[0048] The third sleeve 97 also contains a torsion spring 92, which is fitted around the outer periphery of the central extension of the ratchet 93. One end of the torsion spring 92 is fixedly connected to the end of the first sleeve 91, and the other end is fixedly connected to the central extension of the ratchet 93. With this design, when the ratchet 93 rotates from its initial zero position, the torsion spring 92 will be further tensioned and accumulate torsional elastic potential energy.

[0049] The second sleeve 96 is coaxially equipped with a main shaft 94. The outer wall of the main shaft 94 is machined with a spiral groove 95 by precision etching or CNC milling. The helix angle of the spiral groove 95 is designed according to the required rotation-sliding conversion ratio. A pin 99 is radially fixed to the inner wall of the second sleeve 96. The end of the pin 99 extends into the spiral groove 95 and forms a sliding fit with the spiral groove 95.

[0050] Based on the mating structure of the spiral groove 95 and the pin 99, the movement of the main shaft 94 relative to the second sleeve 96 is geometrically constrained to be a composite motion of simultaneous rotation and sliding. That is, when the main shaft 94 slides upward, it rotates clockwise (or counterclockwise, depending on the spiral direction) simultaneously, and when the main shaft 94 slides downward, it rotates in the opposite direction simultaneously. This structure is similar in principle to a screw drive, but its motion conversion is bidirectional and reversible.

[0051] More importantly, the end of the limiting rod 98 located inside the tube is fixedly connected to the main shaft 94. Based on this connection method, the rotation of the main shaft 94 is transmitted to the ratchet 93 through the limiting rod 98, and the ratchet 93 rotates synchronously; the rotation of the ratchet 93 will then force the torsion spring 92 to store or release energy.

[0052] The limiting rod 98 has an axially extending connecting pipe inside, which extends upward through the extended end of the limiting rod 98 and connects to an external negative pressure system via a flexible air tube. A suction cup 915 is installed at the downward-extending end of the main shaft 94 relative to the first sleeve 91, and the suction chamber of the suction cup 915 connects to the internal connecting pipe of the limiting rod 98. This forms a negative pressure passage running through the center of the main shaft 94, allowing the suction cup 915 to adsorb the coarse sheet 200 under the action of the negative pressure system.

[0053] The first sleeve 91 is also equipped with a push rod 916. The push rod 916 is located in the annular interlayer between the second sleeve 96 and the first sleeve 91, and its axis is parallel to the axis of the main shaft 94 but offset. A push rod limiting sleeve 912 is installed in the interlayer. The inner hole of the push rod limiting sleeve 912 forms a sliding fit with the push rod 916, which restricts the push rod 916 to slide up and down in the axial direction and prevents circumferential deflection.

[0054] The push rod 916 extends from the bottom of the first sleeve 91, and the lower end of the protruding part forms a height difference with the lower end of the suction cup 915. Specifically, the lower end of the push rod 916 is closer to the fixture 4 (i.e., closer to the ground) than the lower end of the suction cup 915. This height difference ensures that during the pressing process of the pressing assembly 9, the push rod 916 can contact the upper surface of the ring 100 before the coarse sheet 200 adsorbed by the suction cup 915.

[0055] The portion of the push rod 916 located within the interlayer also has a push rod extension 914, which is a radially outward-protruding flange structure of the push rod 916, located below the push rod limiting sleeve 912. A compression spring 913 is also fitted onto the push rod 916, with both ends of the spring 913 fixed between the push rod extension 914 and the push rod limiting sleeve 912, respectively. In its free state, the spring 913 pushes the push rod 916 downward, maintaining it at its initial position at the lower end of its stroke. When the push rod 916 is pushed upward by an external force, the spring 913 is compressed and stores energy. After the external force is removed, the spring 913 releases its energy, driving the push rod 916 to its original position.

[0056] The inner wall of the first sleeve 91 is also equipped with a rotatable pawl 910. The pawl 910 is hinged and contains an elastic body such as a spring or torsion spring. Under normal conditions, the pawl 910 is pushed by the elastic body, causing its front end to engage in the toothed groove on the periphery of the ratchet 93. This pawl 910 is a typical ratchet structure. Its working mechanism is that when the ratchet 93 rotates in one direction, the pawl 910 slides along the inclined surface of the toothed groove, allowing the ratchet 93 to rotate; while when the ratchet 93 rotates in the opposite direction, the pawl 910 is blocked by the steep surface of the toothed groove, thus restricting the ratchet 93 from rotating in the opposite direction. In other words, the pawl 910 gives the ratchet 93 the characteristic of unidirectional rotation, so that the torsion spring 92, after being energized by the rotation of the ratchet 93, cannot automatically unload the force due to its own elastic restoring force.

[0057] Specifically, the push rod 916 has a tapered section in its axial center, which gradually thickens along the upward direction of the push rod 916, extending from the push rod limiting sleeve 912 to the lateral position of the pawl 910. This tapered design is key to enabling the active unlocking of the pawl 910. When the push rod 916 is pushed upward from the bottom, it moves axially upward, and the gradually thickening tapered section approaches and contacts the side of the pawl 910. Through a wedge-shaped pressing action, the pawl 910 is pushed outward, causing its front end to disengage from the tooth groove of the ratchet 93, thereby releasing the one-way locking of the ratchet 93. When the push rod 916 resets, the pawl 910, under the elastic force of the built-in elastic body, re-engages into the tooth groove of the ratchet 93, restoring the one-way locking state of the ratchet 93.

[0058] Based on the above structural design, the complete operation process of press-fitting component 9 is as follows: The coarse sheet 200 is pushed onto the rotatable platform of the second material table 74 by the vibratory feeder. At this time, the second multi-axis motion unit 72 drives the pressing assembly 9 to translate along the X and Y axes to directly above the second material table 74, and then descends along the Z axis. During the descent, the suction cup 915 first contacts and presses against the coarse sheet 200, the negative pressure system is activated, and the suction cup 915 firmly adsorbs the coarse sheet 200. It should be noted that during this stage, the lower end of the push rod 916 still maintains a sufficient safety distance from the bottom of the T-slot of the second material table 74, so the push rod 916 is not subjected to an upward thrust and remains in its initial position, and the pawl 910 is still engaged in the tooth groove of the ratchet 93.

[0059] While the suction cup 915 presses down on the coarse sheet 200, due to the inertia of the pressing assembly 9 still moving downward along the Z-axis, the main shaft 94 experiences an upward reaction force (relative to the second sleeve 96). Constrained by the geometric shape of the spiral groove 95 and the pin 99, the main shaft 94 retracts and slides into the second sleeve 96, simultaneously rotating axially during this process. This rotation is transmitted to the ratchet 93 via the limit rod 98, causing the ratchet 93 to rotate synchronously, further tightening the torsion spring 92 and accumulating torsional elastic potential energy. During the rotation of the ratchet 93, the pawl 910 slides along the inclined surface of the tooth groove, allowing the ratchet 93 to rotate unidirectionally. When the main shaft 94 retracts and the ratchet 93 stops rotating, the pawl 910 immediately engages in the nearest tooth groove, locking the ratchet 93 and preventing the torsion spring 92 from releasing its energy.

[0060] It is worth noting that while the main shaft 94 rotates, the coarse sheet 200 adsorbed by the suction cup 915 also rotates along with the main shaft 94. Since a rotatable platform is embedded in the T-slot of the second material table 74, the coarse sheet 200 remains circumferentially stationary relative to the support surface of the platform (the platform rotates freely with the coarse sheet 200), thereby avoiding relative friction between the bottom surface of the coarse sheet 200 and the rigid support surface, effectively protecting the integrity of the surface of the coarse sheet 200.

[0061] After energy storage and adsorption are completed, the second multi-axis motion unit 72 drives the pressing assembly 9 to move upward along the Z-axis and translate along the X and Y axes to directly above the pressing station fixture 4, completing the aerial transfer of the rough sheet 200. During the transfer process, thanks to the one-way locking action of the chuck 910, the elastic potential energy stored in the torsion spring 92 is stably maintained, and the main shaft 94 will not slide downward relative to the second sleeve 96.

[0062] The pressing assembly 9 descends along the Z-axis, aligning the coarse piece 200 with the center of the inner ring 100 of the fixture 4. During the descent, the lower end of the push rod 916 first contacts the upper end face of the ring 100. Due to the certain reserved trigger stroke of the push rod 916 (i.e., the height difference between the push rod 916 and the suction cup 915), the pressing assembly 9 can continue to move downward. During this process, the push rod 916 slides upward relative to the first sleeve 91 (essentially, the first sleeve 91 moves downward while the push rod 916 is held still by the ring 100), and the spring 913 is compressed and stores energy.

[0063] As the pressing assembly 9 continues to press down, the coarse piece 200 partially enters the ring 100. The upward movement of the push rod 916 causes its tapered portion to gradually push against the pawl 910, pushing the pawl 910 outward from the tooth groove of the ratchet 93. At this moment, the one-way locking of the pawl 910 is released, and the torsional elastic potential energy previously accumulated by the torsion spring 92 is released instantaneously, driving the ratchet 93 to rotate in the opposite direction. This reverse rotation is transmitted to the main shaft 94 through the limit rod 98. Under the constraint of the helical groove 95 and the pin 99, the main shaft 94 slides downward synchronously and combines with axial rotation. In addition, after the torsion spring 92 releases its energy, due to the inertia of the moving parts such as the main shaft 94 and the limit rod 98, the system will overshoot and swing back after reaching the equilibrium position, that is, a damped oscillating motion alternates between clockwise and counterclockwise. The amplitude of this oscillation motion gradually decreases with damping until it stops.

[0064] It is this damped oscillating motion that causes the coarse sheet 200 adsorbed by the suction cup 915 to reciprocate axially within the ring 100 and rotate alternately in both directions. This combined motion is equivalent to applying a kneading effect between the ring 100 and the coarse sheet 200, causing the star-shaped adhesive or specific fluid previously spun into the upper part of the inner wall of the ring 100 by the adhesive slinging component 6 to be evenly coated and spread between the outer periphery of the coarse sheet 200 and the inner wall of the ring 100. Ultimately, a continuous, uniform, and dense bonding layer is formed in the tiny gap between the two, significantly improving the bonding strength and consistency between the coarse sheet 200 and the ring 100.

[0065] After the elastic potential energy of the torsion spring 92 is fully released and the oscillation stops, the negative pressure system is shut off, the suction cup 915 loses its adsorption force, and the coarse plate 200 is firmly retained in the ring 100 under the action of the inherent friction and connection force within the ring 100, and will not be carried out as the suction cup 915 moves upward. The pressing assembly 9 moves upward along the Z-axis to reset, the push rod 916 disengages from the ring 100, and resets to its initial position under the pushing action of the spring 913. The pawl 910 re-engages into the tooth groove of the ratchet 93 under the action of the elastic body, waiting to enter the next pressing cycle.

[0066] It should be noted that the design concept of this press-fitting component 9 is that it can mechanically complete the entire action chain of adsorption, energy storage, holding, energy release oscillation, press-fitting, and loosening by relying solely on the downward pressing action of the Z-axis. It does not require additional rotary motors, vibration motors, or special energy release drive components, which greatly simplifies the complexity of the control system and reduces the failure rate. At the same time, the oscillation action achieved by the purely mechanical means has a fast frequency response, natural amplitude attenuation, and the adhesive coating effect is better than that of electrically driven forced vibration.

[0067] See Figure 5 As shown, the assembly unloading component 8 is used to remove the assembled ring 100 and coarse sheet 200 from the fixture 4 and transfer them to the downstream conveyor belt for subsequent processes.

[0068] The assembly unloading component 8 includes a third multi-axis motion unit bracket 81 mounted on the base 1, and a third multi-axis motion unit 82 mounted on the third multi-axis motion unit bracket 81. The third multi-axis motion unit 82 preferably adopts a three-axis Cartesian coordinate robot structure. The conveying end of the third multi-axis motion unit 82 is equipped with a second gripper 83. The style and working principle of the second gripper 83 are completely consistent with the aforementioned first gripper 57. Both are pneumatic gripper structures, and the gripping and releasing of the assembly are achieved by opening and closing two opposing jaws.

[0069] During operation, the third multi-axis motion unit 82 drives the second clamp 83 to move directly above the unloading station fixture 4, and then moves downward until the jaws of the second clamp 83 extend into the receiving space of the fixture 4 on both sides; the jaws close, clamping the two sides of the assembly; the third multi-axis motion unit 82 drives the second clamp 83 to move upward, horizontally to directly above the downstream conveyor belt, and then downward; the jaws release, and the assembly is placed smoothly on the conveyor belt, flowing with the conveyor belt to the downstream process.

[0070] After integrating the above components, the complete workflow of the pressing mechanism of the present invention is as follows: The external feeding system transports the ring 100 and the coarse sheet 200 sequentially to the first feeding platform 54 of the ring feeding assembly 5 and the second feeding platform 74 of the coarse sheet feeding assembly 7 via their respective vibratory feeders. After the control system is activated, the turntable 3 enters an intermittent rotation state under the drive of the turntable drive unit 2. In each cycle, the components at each station operate in parallel: Loading station: The first clamp 57 of the ring loading assembly 5 clamps a ring 100 from the first material table 54 and loads it into the fixture 4 located at the station. Spinning station: The spinning disc 67 of the spinning assembly 6 descends into the inner ring 100 of the fixture 4, where it is injected with glue by the glue pump 65 and driven to rotate by the motor 64 to complete the centrifugal spinning operation. Pressing station: The pressing component 9 of the coarse sheet feeding component 7 first adsorbs the coarse sheet 200 at the second material table 74 and completes the energy storage of the torsion spring 92. Then it is transferred to the fixture 4 above the station to perform pressing energy release oscillation and complete the precision connection and assembly of the coarse sheet 200 and the ring body 100. Unloading station: The second clamp 83 of the assembly unloading component 8 removes the assembly from the fixture 4 and transfers it to the downstream conveyor belt.

[0071] After each station completes its work, turntable 3 enters the next cycle, and each fixture 4 is sequentially moved to the next station. This process is repeated continuously, achieving continuous, efficient, and automated production of rotary magnetic ferrite components.

[0072] The press-fitting mechanism of this invention is particularly suitable for the process of press-fitting coarse spin magnet ferrite sheets 200. As core components of microwave circulators, isolators, and other devices, the assembly quality of spin magnet ferrite devices directly affects key indicators such as the electromagnetic performance, insertion loss, and isolation of the finished product.

[0073] It should be further noted that the multi-axis motion units in this invention are preferably three-axis motion structures, that is, including three mutually orthogonal linear motion degrees of freedom (X, Y, and Z) to meet the requirements of three-dimensional positioning in space. Without departing from the core concept of this invention, those skilled in the art can replace the multi-axis motion units with four-axis or more-axis motion structures according to actual process requirements, such as adding a rotation axis for attitude adjustment. These changes should be considered equivalent substitutions of this invention.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A pressing mechanism comprising, characterized in that, It includes a base, a turntable drive unit mounted on the base, and a turntable that is driven to rotate intermittently. Several fixtures are provided on the turntable along its axis. A ring feeding assembly, a glue-spinning assembly, a coarse sheet feeding assembly, and a combined unloading assembly are arranged in sequence around the turntable. The coarse sheet feeding assembly is equipped with a pressing assembly, which is used to adsorb the coarse sheet and load it into the ring body. During the pressing process, the coarse sheet is driven to perform axial reciprocating motion and combined with rotation within the ring body.

2. The pressing mechanism according to claim 1, characterized in that, A groove is provided on the perpendicular line of the midpoint of the shortest connecting line between adjacent fixtures. A limiter is installed on the base. The limiter has a controllable telescopic pin. The shape of the pin end matches the groove.

3. The pressing mechanism according to claim 1, characterized in that, The fixture has a strip groove at the top, and an arc groove extending to the two groove walls is provided in the center of the strip groove. The two arc grooves face each other and together with the strip groove form a receiving space for fitting the ring.

4. The pressing mechanism according to claim 1, characterized in that, The ring-shaped feeding assembly includes a first multi-axis motion part bracket, a first multi-axis motion part mounted on the first multi-axis motion part bracket, a first clamp mounted on the conveying end of the first multi-axis motion part, and also includes a first material rail bracket, a first material rail fixed on the first material rail bracket, and a first material platform fixed on the first material rail bracket. The top of the first material platform is provided with a T-shaped groove communicating with the first material rail.

5. The pressing mechanism according to claim 1, characterized in that, The spun glue assembly includes a linear motion part bracket, a linear motion part mounted on the linear motion part bracket, and a mounting base driven by the linear motion part to move up and down. The mounting base is equipped with a motor with the drive end facing downwards, and the drive end of the motor is connected to a material throwing disc with an outer diameter smaller than the inner diameter of the ring. The material throwing disc is a cup-shaped structure with several through holes on its side wall. A glue pump is also installed on the mounting base. The glue pump delivers glue or fluid to the material throwing disc through a glue tube.

6. The pressing mechanism according to claim 1, characterized in that, The coarse sheet feeding assembly includes a second multi-axis motion part bracket and a second multi-axis motion part mounted on the second multi-axis motion part bracket. The pressing assembly is installed at the conveying end of the second multi-axis motion part. It also includes a second material rail bracket, a second material rail fixed on the second material rail bracket, and a second material platform fixed by a second material platform bracket. The top of the second material platform is provided with a T-shaped groove communicating with the second material rail, and a rotatable platform is embedded in the T-shaped groove.

7. The pressing mechanism according to claim 1, characterized in that, The pressing assembly includes a first sleeve fixedly connected to the conveying end of the coarse sheet feeding assembly. A second sleeve and a third sleeve are coaxially arranged at intervals within the first sleeve. A ratchet is provided in the interval area between the second sleeve and the third sleeve. A bearing is installed inside the third sleeve, and the central extension of the ratchet is inserted into the bearing. The ratchet has a limiting channel at its center, and a limiting rod that can slide relative to the ratchet is installed in the channel. The limiting rod passes through the end of the first sleeve and extends outward. The third sleeve is equipped with a torsion spring. One end of the torsion spring is fixedly connected to the end of the first sleeve, and the other end is connected to the central extension of the ratchet.

8. The pressing mechanism according to claim 7, characterized in that, The second sleeve is provided with a main shaft, the outer wall of the main shaft is provided with a spiral groove, the inner wall of the second sleeve is provided with a pin that extends into the spiral groove, and the end of the limiting rod located inside the tube is fixedly connected to the main shaft. The limiting rod is equipped with a pipe connected to the negative pressure system, and a suction cup is installed at the end of the main shaft that extends outward.

9. The pressing mechanism according to claim 8, characterized in that, The first sleeve is also equipped with a push rod, which is located in the interlayer between the second sleeve and the first sleeve. A push rod limiting sleeve is installed in the interlayer, which fits the push rod. The push rod extends out from the bottom of the first sleeve and forms a height difference with the suction cup. The part of the push rod located inside the interlayer is provided with a push rod extension. A spring is also sleeved on the push rod, and the two ends of the spring are fixedly connected to the push rod extension and the push rod limiting sleeve, respectively. The inner wall of the first sleeve is provided with a rotatable pawl, which engages in the outer tooth groove of the ratchet to restrict the ratchet from rotating in the opposite direction; The top rod has a tapered portion that extends from the top rod limiting sleeve to the lateral position of the chuck.

10. The application of the pressing mechanism according to any one of claims 1 to 9 in pressing rotary magnetic ferrite sheets.

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