A semi-automatic polishing jig for the inner hole of a magnetic core

Abstract

The utility model provides a kind of semi-automatic polishing magnetic core inner hole's tool jig, it is related to magnetic core processing technical field, including workbench, for placing to be polished magnetic core;Polishing assembly, it is suspended above the workbench, including pneumatic component and the polishing stick being set on the pneumatic component;Moving assembly, including fixed column, moving plate and handle being set on the fixed column, the polishing stick is set on the moving plate, and the handle is connected with the moving plate by connecting component;Wherein, by pressing the handle to make the moving plate drive polishing stick to the magnetic core movement, so that the pneumatic component is driven the polishing stick rotation by air pipe to carry out polishing to the inner hole of the magnetic core.A kind of semi-automatic polishing magnetic core inner hole's tool jig in the utility model, solve the problem that there is no low cost, high precision and high efficiency's semi-automatic polishing magnetic core inner hole's tool jig in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic core processing technology, and specifically relates to a tooling fixture for semi-automatic grinding of the inner hole of a magnetic core. Background Technology

[0002] As an indispensable basic component in electronic devices, magnetic cores play a crucial role in devices such as inductors and transformers. Their performance and quality directly affect the operational stability and reliability of the entire electronic device. During the manufacturing process of magnetic cores, some toroidal magnetic cores require precise drilling in their middle positions to meet the needs of subsequent assembly and use. At the same time, if there are burrs or warped edges on the end face after drilling, it will not only affect the appearance quality of the magnetic core, but may also scratch other parts during subsequent assembly, and may even change the electromagnetic properties of the magnetic core, leading to a decrease in equipment performance. Therefore, after drilling the magnetic core, it is necessary to polish the end face of the drilled hole to prevent burrs or warped edges from existing on the magnetic core.

[0003] Existing magnetic core surface treatment technologies include fully automated grinding devices and manual grinding. Manual grinding has the advantage of high applicability, capable of grinding the inner rings of all types of magnetic cores, and is relatively inexpensive, but it is also less efficient and the grinding precision is difficult to control. Fully automated grinding offers the advantages of high efficiency and high precision, but its cost is higher, and due to the wide variety of magnetic core specifications, multiple automated grinding devices or various grinding and positioning components need to be replaced, further increasing production costs. Moreover, magnetic cores that do not require drilling have a wider range of applications and greater demand, making it less economically efficient to purchase high-cost automated grinding equipment for a small number of applications. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a tooling fixture for semi-automatic grinding of the inner hole of a magnetic core, aiming to solve the problem of the lack of a low-cost, high-precision and high-efficiency tooling fixture for semi-automatic grinding of the inner hole of a magnetic core in the prior art.

[0005] This utility model proposes a semi-automatic tooling fixture for grinding the inner hole of a magnetic core, characterized in that it includes:

[0006] A worktable is used to place the magnetic core to be polished; a polishing assembly is suspended above the worktable and includes a pneumatic component and a polishing rod disposed on the pneumatic component; a moving assembly includes a fixed column, a moving plate disposed on the fixed column, and a handle, wherein the polishing rod is disposed on the moving plate, and the handle is connected to the moving plate through a connecting component; wherein, by pressing down the handle, the moving plate moves the polishing rod toward the magnetic core, so that the pneumatic component drives the polishing rod to rotate through an air pipe to polish the inner hole of the magnetic core.

[0007] The aforementioned semi-automatic fixture for grinding the inner hole of a magnetic core utilizes a worktable for placing the magnetic core to be ground. A handle in the moving assembly moves a moving plate relative to a fixed column, causing the grinding assembly on the moving plate to move accordingly. This aligns the grinding rod with and approaches the inner hole of the magnetic core. Once the grinding rod is in place, air is supplied to the pneumatic components, causing them to rotate the grinding rod. This results in rapid and efficient grinding of the inner hole of the magnetic core, and the automatic grinding by pneumatic drive ensures grinding precision. Furthermore, this device can be manufactured using existing pneumatic components and multiple welded plates, resulting in a simple structure, convenient operation, and low cost. Therefore, this invention solves the problem of the lack of a low-cost, high-precision, and high-efficiency semi-automatic fixture for grinding the inner hole of magnetic cores in the prior art.

[0008] In addition, the semi-automatic tooling fixture for grinding the inner hole of a magnetic core proposed in this utility model may also have the following additional technical features:

[0009] Preferably, the tooling fixture further includes a return assembly, which includes a fixed plate and springs connected at both ends to the fixed plate and the movable plate respectively. The fixed plate is disposed on the fixed column and located above the movable plate. A guide rod is provided above the movable plate, and a guide hole adapted to the guide rod is provided on the fixed plate.

[0010] Preferably, the connecting component is a transmission rod, one side of the handle is rotatably connected to the side of the fixed plate away from the grinding assembly, one end of the transmission rod is rotatably connected to the side of the handle near the fixed plate, and the other end is rotatably connected to the moving plate.

[0011] Preferably, the first segment is the part of the handle that extends from the side near the fixed plate to the point where it connects with the transmission rod, and the remaining part is the second segment. The length ratio between the first segment and the second segment is 1:(3-5).

[0012] Preferably, the tooling fixture further includes a positioning component, which includes two symmetrically arranged clamping blocks, a drive shaft disposed on one side of the clamping blocks, and a connecting plate connecting the drive shaft and the clamping blocks. The drive shaft has external threads with opposite directions at both ends. One end of the connecting plate is fixedly connected to the clamping blocks, and the other end is provided with a nut sleeved on the connecting shaft. The drive shaft rotates to drive the two clamping blocks closer or further apart.

[0013] Preferably, the tooling fixture further includes a linkage assembly, which includes a support block and an L-shaped plate disposed within the support block. The L-shaped plate has a rack portion at one end near the drive shaft, and a gear meshing with the rack portion is provided on the drive shaft. The other end of the L-shaped plate has an inclined surface. The bottom of the movable plate has a vertical plate with an inclined bottom, and the two inclined surfaces are adapted to each other. A slider is provided on the top side of the L-shaped plate away from the vertical plate. The support block has a groove adapted to the slider. Below the groove is a clearance groove for avoiding the L-shaped plate, and an elastic element is provided at the bottom of the groove.

[0014] Preferably, the clamping block includes an arc-shaped base plate, an arc-shaped top plate disposed above the arc-shaped base plate, and an arc-shaped connecting plate connecting the arc-shaped top plate and the arc-shaped base plate, wherein the inner contour of the arc-shaped connecting plate is adapted to the outer contour of the magnetic field.

[0015] Preferably, the area of ​​the arc-shaped top plate is smaller than the area of ​​the arc-shaped bottom plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a semi-automatic tooling fixture for grinding the inner hole of a magnetic core, as proposed in one embodiment of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of a tooling fixture for semi-automatic grinding of the inner hole of a magnetic core, after concealing the positioning component and the linkage component, according to one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the positioning component proposed in one embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the linkage component proposed in one embodiment of the present utility model;

[0020] Explanation of key component symbols:

[0021] pneumatic components 21 Polishing rod 22 Mobile component 30 Fixed column 31 mobile board 32 handle 33 Connecting components 34 Return component 40 Fixed plate 41 spring 42 Guide rod 35 Guide hole 411 Positioning components 50 Clamping block 51 transmission shaft 52 Connecting plate 53 Nut 54 Linkage components 60 support block 61 L-shaped board 62 rack section 621 bevel 622 gear 521 vertical board 36 slider 63 groove 611 clearance slot 612 elastic element 64 Curved base plate 511 Curved top plate 512 Arc-shaped connecting plate 513

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Please see Figures 1 to 4 The image shows a semi-automatic tooling fixture for grinding the inner hole of a magnetic core according to an embodiment of the present invention. It includes a worktable 10 for placing the magnetic core to be ground; a grinding assembly 20 suspended above the worktable 10, comprising a pneumatic component 21 and a grinding rod 22 mounted on the pneumatic component 21; and a moving assembly 30 including a fixed post 31, a moving plate 32 mounted on the fixed post 31, and a handle 33. The grinding rod 22 is mounted on the moving plate 32, and the handle 33 is connected to the moving plate 32 via a connecting component 34. By pressing down the handle 33, the moving plate 32 moves the grinding rod 22 toward the magnetic core, causing the pneumatic component 21 to drive the grinding rod 22 to rotate via an air pipe, thus grinding the inner hole of the magnetic core.

[0027] Understandably, by setting up a worktable 10 to place the magnetic core to be polished, and by using the handle 33 in the moving assembly 30 to move the moving plate 32 relative to the fixed column 31, the polishing assembly 20 on the moving plate 32 moves accordingly, thereby aligning and approaching the polishing rod 22 with the inner hole of the magnetic core to be polished. After the polishing rod 22 moves into place, air is supplied to the pneumatic component 21, which drives the polishing rod 22 to rotate, thus enabling rapid and efficient polishing of the inner hole of the magnetic core. Furthermore, the automatic polishing by pneumatically driving the polishing rod 22 also ensures polishing accuracy. This device can be manufactured by welding existing pneumatic components 21 and multiple plates, resulting in a simple structure and low cost. Therefore, this invention solves the problem of the lack of a low-cost, high-precision, and high-efficiency semi-automatic tooling fixture for polishing the inner hole of magnetic cores in the prior art.

[0028] It should be noted that, in specific implementation, the pneumatic component 21 can be any component or structure that drives the grinding rod 22 to rotate through airflow. Its specific structure is not the focus of this solution. For example, it can be a vane-type pneumatic motor, a piston-type pneumatic motor, etc.

[0029] Specifically, the tooling fixture also includes a return assembly 40, which includes a fixed plate 41 and springs 42 connected to the fixed plate 41 and the moving plate 32 at both ends respectively. The fixed plate 41 is mounted on the fixed post 31 and located above the moving plate 32. A guide rod 35 is provided above the moving plate 32, and a guide hole 411 adapted to the guide rod 35 is provided on the fixed plate 41. In specific implementation, to ensure the grinding rod 22 returns to its original position after use, and that in the initial state, the grinding rod 22 is suspended above the worktable 10 with sufficient space for placing the magnetic core, springs 42 are provided. This allows the grinding plate and the moving plate 32 to be suspended above the worktable 10 without external force, and to be adjusted and fixed relative to the fasteners in real time. The springs 42 also provide an automatic reset effect, increasing the convenience and efficiency of use.

[0030] Additionally, the connecting component 34 is a transmission rod. One side of the handle 33 is rotatably connected to the side of the fixed plate 41 away from the grinding assembly 20, and one end of the transmission rod is rotatably connected to the side of the handle 33 near the fixed plate 41, while the other end is rotatably connected to the moving plate 32. In practical implementation, the handle 33 drives the moving plate 32 to move up and down via the transmission rod. The connection between the handle 33 and the moving plate 32 utilizes the lever principle to increase the length of the torque, allowing the operator to achieve the effect of driving the grinding rod 22 with a smaller force, avoiding the situation where the operator needs to directly resist the elastic force of the spring 42.

[0031] Specifically, the first segment is the part of the handle 33 closest to the fixed plate 41 that connects to the transmission rod, and the remaining part is the second segment. The length ratio between the first and second segments is 1:(3-5). In practice, by reasonably adjusting the length relationship between the first and second segments, a larger torque can be ensured to reduce the physical exertion required by the workers during polishing, while also ensuring sufficient length to allow the moving plate 32 to move up and down.

[0032] Additionally, the tooling fixture also includes a positioning component 50. The positioning component 50 includes two symmetrically arranged clamping blocks 51, a drive shaft 52 positioned on one side of the clamping blocks 51, and a connecting plate 53 connecting the drive shaft 52 and the clamping blocks 51. The drive shaft 52 has external threads with opposite directions at both ends. One end of the connecting plate 53 is fixedly connected to the clamping blocks 51, and the other end has a nut 54 sleeved on the connecting shaft. The drive shaft 52 rotates to drive the two clamping blocks 51 closer to or further away. In specific implementation, by setting the positioning component 50, the rotation of the drive shaft 52, through the engagement of the external threads on the drive shaft 52 and the nut 54, causes the nut 54 to move relative to the length of the drive shaft 52, thereby causing the two clamping blocks 51 to move closer to or further away from each other. This achieves automatic positioning during magnetic core grinding, ensuring the accuracy of the magnetic core's position during grinding, and fixing the magnetic core to prevent it from rotating with the grinding rod 22 during grinding, thus affecting the grinding effect.

[0033] Specifically, the tooling fixture also includes a linkage component 60, which includes a support block 61 and an L-shaped plate 62 disposed within the support block 61. The L-shaped plate 62 has a rack portion 621 at one end near the drive shaft 52, and a gear 521 meshing with the rack portion 621 is provided on the drive shaft 52. The other end of the L-shaped plate 62 has an inclined surface 622. The bottom of the moving plate 32 has a vertical plate 36 with an inclined surface 622 at the bottom. The two inclined surfaces 622 are adapted to each other. A slider 63 is provided on the top side of the L-shaped plate 62 away from the vertical plate 36. The support block 61 has a groove 611 adapted to the slider 63. Below the groove 611 is a clearance groove 612 for avoiding the L-shaped plate 62. An elastic element 64 is provided at the bottom of the groove 611. In practice, pressing down the handle 33 drives the moving plate 32 downwards, causing the vertical plate 36 to press against the L-shaped plate. This causes the L-shaped plate to move towards the positioning component 50, resulting in the rack 621 engaging with the gear 521 to rotate the transmission shaft 52. This achieves self-positioning of the magnetic core. Simultaneously, the slider 63 presses against the elastic element 64. Once the two inclined surfaces 622 are no longer in contact, the vertical plate 36 stops pressing against the L-shaped plate, allowing the clamping block 51 to maintain its current clamping force to fix the magnetic core, preventing damage from excessive clamping force. After grinding, the vertical plate 36 resets, and the L-shaped plate, under the action of the elastic element 64, moves away from the positioning component 50 to achieve its reset, causing the two clamping blocks 51 to move away from each other, facilitating core replacement. Furthermore, the cooperation between the positioning component 50 and the linkage component 60 eliminates the need for repeated clamping and releasing of the magnetic core, further increasing work efficiency and avoiding inaccurate positioning during manual operation.

[0034] Additionally, the clamping block 51 includes an arc-shaped base plate 511, an arc-shaped top plate 512 disposed above the arc-shaped base plate 511, and an arc-shaped connecting plate 513 connecting the arc-shaped top plate 512 and the arc-shaped base plate 511. The inner contour of the arc-shaped connecting plate 513 is adapted to the outer contour of the magnetic core. In specific implementation, the clamping block 51 can adopt an arc-shaped structure, so that the two sides of the magnetic core are clamped between the upper arc-shaped top plate 512 and the lower arc-shaped base plate 511 to restrict the six degrees of freedom of the magnetic core. Through the arc-shaped connecting plate 513 and the outer contour of the magnetic core, there is sufficient contact area between the magnetic core and the arc-shaped connecting plate 513, thereby providing sufficient clamping force and applying it over a large area to avoid excessive force on a single point of the magnetic core.

[0035] Specifically, the area of ​​the curved top plate 512 is smaller than the area of ​​the curved bottom plate 513. In practice, by adjusting the area of ​​the curved top plate 512, the magnetic core can be roughly placed on the curved bottom plate 511 from the top during pre-positioning, between the two clamping blocks 51. Minimal positional adjustments are needed; the positioning component 50 will automatically position the core, thus improving work efficiency.

[0036] In summary, the semi-automatic tooling fixture for grinding the inner hole of a magnetic core in the above embodiments of this utility model uses a worktable 10 to place the magnetic core to be ground. The handle 33 in the moving assembly 30 drives the moving plate 32 to move relative to the fixed column 31, causing the grinding assembly 20 on the moving plate 32 to move accordingly. This allows the grinding rod 22 to align with and approach the inner hole of the magnetic core. Once the grinding rod 22 is in place, air is supplied to the pneumatic component 21, causing it to rotate the grinding rod 22. This enables rapid and efficient grinding of the inner hole of the magnetic core, and the automatic grinding by pneumatically driving the grinding rod 22 ensures grinding accuracy. Furthermore, this device can be manufactured by welding existing pneumatic components 21 and multiple plates, resulting in a simple structure, convenient operation, and low cost. Therefore, this utility model solves the problem of the lack of a low-cost, high-precision, and high-efficiency semi-automatic tooling fixture for grinding the inner hole of magnetic cores in the prior art.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A semi-automatic tooling fixture for grinding the inner hole of a magnetic core, characterized in that, include A workbench, used to place the magnetic core to be polished; A grinding assembly, suspended above the worktable, includes a pneumatic component and a grinding rod mounted on the pneumatic component; A movable component includes a fixed post, a movable plate disposed on the fixed post, and a handle, wherein the grinding rod is disposed on the movable plate, and the handle is connected to the movable plate via a connecting component; Specifically, by pressing down the handle, the moving plate moves the polishing rod toward the magnetic core, and the pneumatic component drives the polishing rod to rotate through the air pipe to polish the inner hole of the magnetic core.

2. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 1, characterized in that, The tooling fixture also includes a return assembly, which includes a fixed plate and springs at both ends connected to the fixed plate and the movable plate, respectively. The fixed plate is disposed on the fixed column and located above the movable plate. A guide rod is provided above the movable plate, and a guide hole adapted to the guide rod is provided on the fixed plate.

3. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 2, characterized in that, The connecting component is a transmission rod. One side of the handle is rotatably connected to the side of the fixed plate away from the grinding assembly. One end of the transmission rod is rotatably connected to the side of the handle near the fixed plate, and the other end is rotatably connected to the moving plate.

4. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 3, characterized in that, The first segment is the part of the handle that is close to the fixed plate and connects to the transmission rod, and the remaining part is the second segment. The length ratio between the first segment and the second segment is 1:(3-5).

5. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 1, characterized in that, The tooling fixture also includes a positioning component, which includes two symmetrically arranged clamping blocks, a drive shaft disposed on one side of the clamping blocks, and a connecting plate connecting the drive shaft and the clamping blocks. The drive shaft has external threads with opposite directions at both ends. One end of the connecting plate is fixedly connected to the clamping block, and the other end is provided with a nut sleeved on the drive shaft. The drive shaft rotates to drive the two clamping blocks closer or further apart.

6. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 5, characterized in that, The tooling fixture also includes a linkage assembly, which includes a support block and an L-shaped plate disposed within the support block. The L-shaped plate has a rack portion near one end of the drive shaft, and a gear meshing with the rack portion is provided on the drive shaft. The other end of the L-shaped plate has an inclined surface. The bottom of the movable plate has a vertical plate with an inclined bottom, and the two inclined surfaces are adapted to each other. A slider is provided on the top side of the L-shaped plate away from the vertical plate. The support block has a groove adapted to the slider. Below the groove is a clearance groove for avoiding the L-shaped plate, and an elastic element is provided at the bottom of the groove.

7. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 6, characterized in that, The clamping block includes an arc-shaped base plate, an arc-shaped top plate disposed above the arc-shaped base plate, and an arc-shaped connecting plate connecting the arc-shaped top plate and the arc-shaped base plate. The inner contour of the arc-shaped connecting plate is adapted to the outer contour of the magnetic core.

8. The tooling fixture for semi-automatic grinding of the inner hole of a magnetic core according to claim 7, characterized in that, The area of ​​the arc-shaped top plate is smaller than the area of ​​the arc-shaped bottom plate.

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