Inner circle grinding fixture structure for target material processing

By designing the internal grinding fixture structure, the electric motor drives the threaded rod and transmission wheel to ensure uniform force on the target material, solving the problems of target material damage and positioning errors caused by small clamping force points, and improving machining accuracy.

CN116141195BActive Publication Date: 2026-06-05WUHU YINGRI TECH CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHU YINGRI TECH CO LTD
Filing Date
2023-02-28
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing inner circle of the target material has a small clamping force point during grinding, which easily damages the target material and causes inaccurate positioning, resulting in processing errors.

Method used

An internal grinding fixture structure is adopted, including a first clamping plate and a second clamping plate. The threaded rod driven by the motor drives the arc-shaped clamping assembly to clamp the target material. The force is evenly distributed through the transmission wheel and the control rod, and the reset spring is used for quick reset.

Benefits of technology

This method achieves uniform clamping and fixation of the target material, avoiding damage and positioning errors, and improving processing accuracy.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116141195B_ABST
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Abstract

The utility model provides a kind of inner circle grinding fixture structure for target material processing, belong to fixture technical field, to solve the smaller stress point when clamping, and currently in processing, possibly repeatedly positioning, lead to the problem of target material damage when clamping is very easy to cause, very easy to appear error, the inner wall of installation slot is rotatably connected with middle connecting rod in the utility model, and the both ends of middle connecting rod are respectively fixedly connected with first threaded rod and second threaded rod, the outer wall of first threaded rod is threadedly connected with first movable platform, the outer wall of second threaded rod is threadedly connected with second movable platform, and the end, away from second threaded rod, of first threaded rod is connected with motor, rotates first threaded rod and second threaded rod using motor, drives first arc-shaped clamping component and second arc-shaped clamping component to clamp target material to be processed, and the target material to be processed is wrapped and clamped and fixed, without repeatedly positioning, also avoid the problem that target material damage when clamping is very easy to cause due to the smaller stress point.
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Description

Technical Field

[0001] This invention relates to the field of fixture technology, and in particular to a fixture structure for internal grinding of target material. Background Technology

[0002] The target material is the material targeted by high-speed charged particles. By changing different target materials (such as aluminum, copper, stainless steel, titanium, nickel targets, etc.), different film systems (such as ultra-hard, wear-resistant, and corrosion-resistant alloy films, etc.) can be obtained.

[0003] Currently, when processing target materials, it is necessary to grind the inner circle of the target material. However, when grinding the inner circle of the target material, it is necessary to use a clamp to hold and fix it from both sides of the outer wall of the target material. Since the outer wall of the target material is arc-shaped, the contact surface of the clamp is small, resulting in a small force point during clamping. Furthermore, during processing, repeated positioning may be required, which can easily damage the target material during clamping and easily lead to errors.

[0004] To address the aforementioned problems, a structure for an internal grinding fixture for target material processing is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an internal grinding fixture structure for target material processing, which solves the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an internal cylindrical grinding fixture structure for target material processing, comprising a cylindrical grinding processing body and a mounting platform disposed on one side of the cylindrical grinding processing body. The upper end of the mounting platform is provided with a first clamping plate and a second clamping plate. The lower end of the first clamping plate is fixedly connected with a first sliding plate, and the lower end of the second clamping plate is fixedly connected with a second sliding plate. A middle connecting plate assembly is slidably disposed at one end of the first sliding plate and the second sliding plate, the middle connecting plate assembly being used to store the first sliding plate and the second sliding plate. A first arc-shaped clamping assembly is disposed on one side of the first sliding plate, and a second arc-shaped clamping assembly is disposed on one side of the second sliding plate. The first arc-shaped clamping assembly and the second arc-shaped clamping assembly are used to clamp the target material to be processed.

[0007] A rotating column is installed at the lower end of the intermediate plate assembly. A connecting block mounted on the mounting platform is rotatably connected to the lower end of the rotating column. A mounting groove is provided through the center of the connecting block. An intermediate rod is rotatably connected to the inner wall of the mounting groove. A first threaded rod and a second threaded rod are fixedly connected to the two ends of the intermediate rod, respectively. The thread structures between the first threaded rod and the second threaded rod are opposite. A first movable platform is threadedly connected to the outer wall of the first threaded rod, and a second movable platform is threadedly connected to the outer wall of the second threaded rod. A motor is connected to the end of the first threaded rod away from the second threaded rod.

[0008] Furthermore, a first transmission wheel is fixedly installed on the output shaft of the motor connected to the first threaded rod. There are two sets of the first transmission wheels, and they are symmetrically distributed about the center of the mounting platform.

[0009] Furthermore, a second transmission wheel is provided on one side of the first transmission wheel, and a control rod is fixedly connected to the inner wall of the second transmission wheel. The control rod is rotatably connected to one side of the first movable platform and the second movable platform. A control block is threadedly connected to the outer wall of the control rod, and a top plate body is fixedly connected to one side of the control block. The top plate body is slidably connected to the first movable platform and the second movable platform respectively.

[0010] Furthermore, the first drive wheel and the second drive wheel are connected by a drive belt.

[0011] Furthermore, the intermediate plate assembly includes an outer plate body, with movable grooves at both ends of the outer plate body. The two sets of movable grooves are slidably connected to the first sliding plate and the second sliding plate, respectively. A push rod is fixedly connected to the bottom plate inside the cavity of the movable groove, and a return spring is fixedly connected to one end of the push rod.

[0012] Furthermore, one end of the return spring in each of the two sets of movable slots is fixedly connected to the first sliding plate and the second sliding plate, respectively.

[0013] Furthermore, the first arc-shaped clamping assembly and the second arc-shaped clamping assembly have the same structural composition.

[0014] Furthermore, the second arc-shaped clamping assembly includes a side connecting rod with one end fixedly connected to the first clamping plate, and a central pivot is provided at the end of the side connecting rod away from the first clamping plate.

[0015] Furthermore, movable channels are provided on both the upper and lower sides of the side connecting rod. The upper arc block and the lower arc block are movably installed in the two sets of movable channels respectively. One end of the upper arc block and the lower arc block are rotatably connected to the central rotating shaft. A reset torsion spring is provided in the cavity of the central rotating shaft. The reset torsion spring is connected to the upper arc block and the lower arc block.

[0016] Another technical solution proposed by the present invention: a method for implementing an internal grinding fixture structure for target material processing, comprising the following steps:

[0017] S1: Place the target material to be processed between the first clamping plate and the second clamping plate, start the motor, and use the motor to drive the first threaded rod and the second threaded rod to rotate, so that the first movable table and the second movable table approach each other through the mounting table, thus squeezing the first clamping plate and the second clamping plate, and driving the upper arc block and the lower arc block to wrap and clamp the target material to be processed.

[0018] S2: When the motor drives the first threaded rod and the second threaded rod to rotate, the control rod can be driven to rotate through the cooperation of the first transmission wheel and the second transmission wheel, so that the top plate body slides on the first movable table and the second movable table. Therefore, when the first movable table and the second movable table squeeze the first arc-shaped clamping assembly and the second arc-shaped clamping assembly to clamp the target material to be processed, the top plate body squeezes the upper part at the same time, which can ensure the uniformity of the force points.

[0019] S3: When the first and second clamping plates are pressed, both the first and second sliding plates move towards the inner wall of the movable groove. Through cooperation with the push rod, the return spring is pressed to a tight state. After the target material is processed, the pressing of the first and second clamping plates is released. Through the reaction of the return spring, the first and second sliding plates are driven to quickly return to their original positions, which facilitates subsequent processing.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. An internal grinding fixture structure for target material processing, wherein when performing internal grinding on the target material, the target material to be processed is first placed between the first clamping plate and the second clamping plate, the motor is started, and the motor drives the first threaded rod and the second threaded rod to rotate, thereby driving the first arc-shaped clamping component and the second arc-shaped clamping component to clamp the target material to be processed, thereby providing a wrap-around clamping and fixing of the target material to be processed, eliminating the need for repeated positioning, and also avoiding the problem that the target material is easily damaged during clamping due to the small force point.

[0022] 2. A grinding fixture structure for target material processing, wherein when the motor drives the first threaded rod and the second threaded rod to rotate, the control rod can be driven to rotate through the cooperation of the first transmission wheel and the second transmission wheel, so that the top plate body slides on the first movable table and the second movable table. Therefore, when the first movable table and the second movable table press the first arc-shaped clamping assembly and the second arc-shaped clamping assembly to clamp the target material to be processed, the top plate body is simultaneously pressed on the upper part, which can ensure the uniformity of the force points. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an internal grinding fixture for target material processing according to the present invention;

[0024] Figure 2 This is a schematic diagram of the overall planar structure of an internal grinding fixture for target material processing according to the present invention;

[0025] Figure 3 This is a schematic diagram of the first and second clamping plates of an internal grinding fixture for target material processing according to the present invention.

[0026] Figure 4 This is a schematic diagram of the first movable stage and the second movable stage of an internal grinding fixture structure for target material processing according to the present invention;

[0027] Figure 5 This is a schematic diagram of the first arc-shaped clamping component and the second arc-shaped clamping component of an internal cylindrical grinding fixture for target material processing according to the present invention;

[0028] Figure 6 This is a schematic diagram of the control rod and control block structure of an internal grinding fixture for target material processing according to the present invention;

[0029] Figure 7 This invention relates to an internal grinding fixture structure for target material processing. Figure 5 A magnified structural diagram at point A;

[0030] Figure 8 This is a schematic diagram of the planar structure of the second arc-shaped clamping component of an internal grinding fixture for target material processing according to the present invention.

[0031] In the diagram: 1. Circular grinding body; 2. Mounting platform; 3. First clamping plate; 4. Second clamping plate; 5. First sliding plate; 6. Second sliding plate; 7. Middle connecting plate assembly; 71. Outer plate; 72. Movable groove; 73. Top rod; 74. Return spring; 8. Rotating column; 9. Connecting block; 10. Mounting groove; 11. First threaded rod; 12. Second threaded rod; 13. First movable platform; 14. Second movable platform; 15. Motor; 16. First transmission wheel; 17. Second transmission wheel; 18. Control rod; 19. Control block; 110. Top plate body; 111. First arc-shaped clamping assembly; 112. Second arc-shaped clamping assembly; 1121. Side connecting rod; 1122. Central rotating shaft; 1123. Movable channel; 1124. Upper arc block; 1125. Lower arc block; 1126. Return torsion spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-8 To address the issue of a small force point during clamping, and the fact that repeated positioning during processing can easily damage the target material and lead to errors, the following preferred technical solution is provided:

[0034] An internal grinding fixture structure for target processing includes a grinding body 1 and a mounting platform 2 disposed on one side of the grinding body 1. The upper end of the mounting platform 2 is provided with a first clamping plate 3 and a second clamping plate 4. The lower end of the first clamping plate 3 is fixedly connected to a first sliding plate 5, and the lower end of the second clamping plate 4 is fixedly connected to a second sliding plate 6. A middle connecting plate assembly 7 is slidably disposed at the end of the first sliding plate 5 and the second sliding plate 6 that are close to each other. The middle connecting plate assembly 7 is used to store the first sliding plate 5 and the second sliding plate 6.

[0035] A rotating column 8 is installed at the lower end of the intermediate plate assembly 7. A connecting block 9 installed on the mounting platform 2 is rotatably connected to the lower end of the rotating column 8. A mounting groove 10 is provided through the center of the connecting block 9. An intermediate rod is rotatably connected to the inner wall of the mounting groove 10. A first threaded rod 11 and a second threaded rod 12 are fixedly connected to the two ends of the intermediate rod, respectively. The thread structure between the first threaded rod 11 and the second threaded rod 12 is opposite. A first movable platform 13 is threadedly connected to the outer wall of the first threaded rod 11. A second movable platform 14 is threadedly connected to the outer wall of the second threaded rod 12. A motor 15 is connected to the end of the first threaded rod 11 away from the second threaded rod 12.

[0036] A first arc-shaped clamping component 111 is provided on one side of the first slide plate 5, and a second arc-shaped clamping component 112 is provided on one side of the second slide plate 6. The first arc-shaped clamping component 111 and the second arc-shaped clamping component 112 are used to clamp the target material to be processed.

[0037] Specifically, when performing internal grinding on the target material, the target material to be processed is first placed between the first clamping plate 3 and the second clamping plate 4. The motor 15 is started, and the motor 15 drives the first threaded rod 11 and the second threaded rod 12 to rotate, so that the first movable table 13 and the second movable table 14 move closer to each other through the mounting table 2. Therefore, the first clamping plate 3 and the second clamping plate 4 are squeezed, which drives the first sliding plate 5 and the second sliding plate 6 to move towards the inner wall of the connecting plate assembly 7. This drives the first arc-shaped clamping assembly 111 and the second arc-shaped clamping assembly 112 to clamp the target material to be processed and to perform a wrap-around clamping and fixing of the target material to be processed. There is no need for repeated positioning, and it also avoids the problem that the target material is easily damaged during clamping due to the small force point.

[0038] To ensure uniform force distribution, the following preferred technical solutions are provided:

[0039] A first transmission wheel 16 is fixedly mounted on the output shaft of the motor 15 connected to the first threaded rod 11. There are two sets of first transmission wheels 16, which are symmetrically distributed about the center of the mounting platform 2. A second transmission wheel 17 is provided on one side of the first transmission wheel 16. A control rod 18 is fixedly connected to the inner wall of the second transmission wheel 17. The control rod 18 is rotatably connected to one side of the first movable platform 13 and the second movable platform 14. A control block 19 is threadedly connected to the outer wall of the control rod 18. A top plate body 110 is fixedly connected to one side of the control block 19. The top plate body 110 is slidably connected to the first movable platform 13 and the second movable platform 14 respectively. The first transmission wheel 16 and the second transmission wheel 17 are connected by a transmission belt.

[0040] Specifically, when the motor 15 drives the first threaded rod 11 and the second threaded rod 12 to rotate, the control rod 18 can be driven to rotate through the cooperation of the first transmission wheel 16 and the second transmission wheel 17, so that the top plate body 110 slides on the first movable platform 13 and the second movable platform 14, and moves in the same direction as the first movable platform 13 and the second movable platform 14. Therefore, when the first movable platform 13 and the second movable platform 14 press the first arc-shaped clamping assembly 111 and the second arc-shaped clamping assembly 112 to clamp the target material to be processed, the top plate body 110 simultaneously presses the upper part, which can ensure the uniformity of the force points and has a significant effect.

[0041] To facilitate subsequent processing, the following preferred technical solutions are provided:

[0042] The intermediate plate assembly 7 includes an outer plate body 71. Both ends of the outer plate body 71 are provided with movable grooves 72. The two sets of movable grooves 72 are slidably connected to the first slide plate 5 and the second slide plate 6 respectively. The bottom plate inside the cavity of the movable groove 72 is fixedly connected with a push rod 73. One end of the push rod 73 is fixedly connected with a return spring 74. One end of the return spring 74 in the two sets of movable grooves 72 is fixedly connected to the first slide plate 5 and the second slide plate 6 respectively.

[0043] Specifically, when the first clamping plate 3 and the second clamping plate 4 are pressed, the first sliding plate 5 and the second sliding plate 6 move towards the inner wall of the movable groove 72. Through cooperation with the push rod 73, the return spring 74 is pressed to a tight state. After the target material is processed, the pressing of the first clamping plate 3 and the second clamping plate 4 is released. Through the reaction of the return spring 74, the first sliding plate 5 and the second sliding plate 6 are driven to quickly return to their original positions, which facilitates subsequent processing.

[0044] To further improve the uniformity of force distribution, the following preferred technical solutions are provided:

[0045] The first arc-shaped clamping assembly 111 and the second arc-shaped clamping assembly 112 have the same structure. The second arc-shaped clamping assembly 112 includes a side connecting rod 1121 with one end fixedly connected to the first clamping plate 3. A central pivot shaft 1122 is provided at the end of the side connecting rod 1121 away from the first clamping plate 3.

[0046] The side connecting rod 1121 has movable channels 1123 on both the upper and lower sides. The two sets of movable channels 1123 are respectively movably installed with an upper arc block 1124 and a lower arc block 1125. One end of the upper arc block 1124 and the lower arc block 1125 are rotatably connected to the central rotating shaft 1122. A reset torsion spring 1126 is provided in the cavity of the central rotating shaft 1122. The reset torsion spring 1126 is connected to the upper arc block 1124 and the lower arc block 1125.

[0047] Specifically, when the target material to be processed is clamped and fixed in a wrap-around manner, the cooperation between the upper arc block 1124, the lower arc block 1125 and the reset torsion spring 1126 will further improve the clamping and fixing efficiency and make the force points more uniform.

[0048] To further explain the above embodiments, the present invention also provides an implementation method for a target material processing internal grinding fixture structure, comprising the following steps:

[0049] Step 1: Place the target material to be processed between the first clamping plate 3 and the second clamping plate 4, start the motor 15, and use the motor 15 to drive the first threaded rod 11 and the second threaded rod 12 to rotate, so that the first movable table 13 and the second movable table 14 approach each other through the mounting table 2, thus squeezing the first clamping plate 3 and the second clamping plate 4, and driving the upper arc block 1124 and the lower arc block 1125 to wrap and clamp the target material to be processed.

[0050] Step 2: When the motor 15 drives the first threaded rod 11 and the second threaded rod 12 to rotate, the control rod 18 can be driven to rotate through the cooperation of the first transmission wheel 16 and the second transmission wheel 17, so that the top plate body 110 slides on the first movable table 13 and the second movable table 14. Therefore, when the first movable table 13 and the second movable table 14 press the first arc-shaped clamping assembly 111 and the second arc-shaped clamping assembly 112 to clamp the target material to be processed, the top plate body 110 presses the upper part at the same time, which can ensure the uniformity of the force points.

[0051] Step 3: When the first clamping plate 3 and the second clamping plate 4 are pressed, the first sliding plate 5 and the second sliding plate 6 move towards the inner wall of the movable groove 72. Through cooperation with the push rod 73, the return spring 74 is pressed to a tight state. After the target material is processed, the pressing of the first clamping plate 3 and the second clamping plate 4 is released. Through the reaction of the return spring 74, the first sliding plate 5 and the second sliding plate 6 are driven to quickly return to their original positions, which facilitates subsequent processing.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding fixture structure for target processing, comprising a grinding body (1) and a mounting table (2) disposed on one side of the grinding body (1), characterized in that: The upper end of the mounting platform (2) is provided with a first clamping plate (3) and a second clamping plate (4). The lower end of the first clamping plate (3) is fixedly connected to a first sliding plate (5), and the lower end of the second clamping plate (4) is fixedly connected to a second sliding plate (6). A middle plate assembly (7) is slidably provided at one end of the first sliding plate (5) and the second sliding plate (6). The middle plate assembly (7) is used to store the first sliding plate (5) and the second sliding plate (6). A first arc-shaped clamping assembly (111) is provided on one side of the first sliding plate (5), and a second arc-shaped clamping assembly (112) is provided on one side of the second sliding plate (6). The first arc-shaped clamping assembly (111) and the second arc-shaped clamping assembly (112) are used to clamp the target material to be processed. A rotating column (8) is installed at the lower end of the intermediate plate assembly (7). A connecting block (9) installed on the mounting platform (2) is rotatably connected to the lower end of the rotating column (8). A mounting groove (10) is provided through the center of the connecting block (9). An intermediate rod is rotatably connected to the inner wall of the mounting groove (10). A first threaded rod (11) and a second threaded rod (12) are fixedly connected to the two ends of the intermediate rod, respectively. The thread structure between the first threaded rod (11) and the second threaded rod (12) is opposite. A first movable platform (13) is threadedly connected to the outer wall of the first threaded rod (11). A second movable platform (14) is threadedly connected to the outer wall of the second threaded rod (12). A motor (15) is connected to the end of the first threaded rod (11) away from the second threaded rod (12). A first transmission wheel (16) is fixedly installed on the output shaft of the motor (15) connected to the first threaded rod (11). There are two sets of the first transmission wheel (16), which are symmetrically distributed about the center of the mounting platform (2). A second transmission wheel (17) is provided on one side of the first transmission wheel (16). A control rod (18) is fixedly connected to the inner wall of the second transmission wheel (17). The control rod (18) is rotatably connected to one side of the first movable platform (13) and the second movable platform (14). A control block (19) is threadedly connected to the outer wall of the control rod (18). A top plate body (110) is fixedly connected to one side of the control block (19). The top plate body (110) is slidably connected to the first movable platform (13) and the second movable platform (14) respectively. The first transmission wheel (16) and the second transmission wheel (17) are connected by a transmission belt. The second arc-shaped clamping assembly (112) includes a side connecting rod (1121) with one end fixedly connected to the first clamping plate (3). A central pivot (1122) is provided at the end of the side connecting rod (1121) away from the first clamping plate (3). Movable channels (1123) are provided on both the upper and lower sides of the side connecting rod (1121). An upper arc block (1124) and a lower arc block (1125) are movably installed in the two sets of movable channels (1123). One end of the upper arc block (1124) and the lower arc block (1125) are rotatably connected to the central pivot (1122). A reset torsion spring (1126) is provided in the cavity of the central pivot (1122). The reset torsion spring (1126) is connected to the upper arc block (1124) and the lower arc block (1125).

2. The internal grinding fixture structure for target material processing as described in claim 1, characterized in that: The middle plate assembly (7) includes an outer plate body (71), and both ends of the outer plate body (71) are provided with movable grooves (72). The two sets of movable grooves (72) are slidably connected to the first slide plate (5) and the second slide plate (6) respectively. The bottom plate inside the cavity of the movable groove (72) is fixedly connected with a push rod (73), and one end of the push rod (73) is fixedly connected with a return spring (74).

3. The internal grinding fixture structure for target material processing as described in claim 2, characterized in that: One end of the return spring (74) in the two sets of movable slots (72) is fixedly connected to the first slide plate (5) and the second slide plate (6) respectively.

4. The internal grinding fixture structure for target material processing as described in claim 1, characterized in that: The first arc-shaped clamping assembly (111) and the second arc-shaped clamping assembly (112) have the same composition structure.

5. A method for implementing the internal grinding fixture structure for target material processing as described in claim 3, characterized in that, Includes the following steps: S1: Place the target material to be processed between the first clamping plate (3) and the second clamping plate (4), start the motor (15), and use the motor (15) to drive the first threaded rod (11) and the second threaded rod (12) to rotate, so that the first movable table (13) and the second movable table (14) approach each other through the mounting table (2), thus squeezing the first clamping plate (3) and the second clamping plate (4), and driving the upper arc block (1124) and the lower arc block (1125) to wrap and clamp the target material to be processed. S2: When the motor (15) drives the first threaded rod (11) and the second threaded rod (12) to rotate, the control rod (18) can be driven to rotate through the cooperation of the first transmission wheel (16) and the second transmission wheel (17), so that the top plate body (110) slides on the first movable table (13) and the second movable table (14). Therefore, when the first movable table (13) and the second movable table (14) squeeze the first arc-shaped clamping assembly (111) and the second arc-shaped clamping assembly (112) to clamp the target material to be processed, the top plate body (110) squeezes the upper part at the same time, which can ensure the uniformity of the force points. S3: When the first clamping plate (3) and the second clamping plate (4) are squeezed, the first sliding plate (5) and the second sliding plate (6) move towards the inner wall of the movable groove (72). Through the cooperation with the push rod (73), the return spring (74) is squeezed to a tight state. After the target material is processed, the squeezing of the first clamping plate (3) and the second clamping plate (4) is released. Through the reaction of the return spring (74), the first sliding plate (5) and the second sliding plate (6) are driven to quickly return to their original positions, which is convenient for subsequent processing.