A high-efficiency shot blasting device for spring inner wall

Abstract

The application discloses a high-efficiency shot blasting equipment for the inner wall of a pipe body or a spring, which comprises a supporting plate, a flow guide pressing plate, an integrated plate, a lifter, a shot blasting pipe and a shot collecting bin. The supporting plate is horizontally fixed and provided with uniformly distributed through holes on the plate surface. The lifter is arranged above the supporting plate in parallel. The integrated plate is arranged below the supporting plate in an inclined manner relative to the horizontal plane and is connected with the lifter. The sidewall of the shot blasting pipe is uniformly provided with shot blasting holes, and the shot blasting pipe is vertically fixed on the upper surface of the integrated plate. Each through hole corresponds to a shot blasting pipe, thereby forming an array type shot blasting gun mechanism. The shot collecting bin is in a conical structure and is arranged below the integrated plate. The shot blasting equipment can realize batch shot blasting treatment for the inner wall of the pipe body or the spring, the shot blasting uniformity is high, the shot blasting treatment efficiency for the special parts is significantly improved, and the treatment cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of shot peening technology, and in particular to a high-efficiency shot peening device for the inner wall of a tube or spring. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Shot peening utilizes high-speed steel shot, ceramic shot, or similar materials to continuously impact the surface of a workpiece, causing plastic deformation and forming a residual compressive stress layer. This layer helps to offset some of the tensile stress experienced during the workpiece's service life, improving its fatigue strength and wear resistance. This surface strengthening process is currently widely used in the processing of mechanical parts. Traditional shot peening equipment is mostly used for strengthening the outer surfaces of parts. However, for workpieces with inner surfaces, such as tubes or springs, existing shot peening technologies struggle to effectively cover the inner walls. Furthermore, when performing shot peening on inner surfaces, the uniformity of the shot is poor, making it difficult to achieve the desired cleaning and strengthening effects.

[0004] To overcome the above problems, over-peening is currently commonly used to ensure that the inner surface of the tube or spring is treated as comprehensively as possible. However, this method is not only more time-consuming, increasing production costs and extending the production cycle, but over-peening can also easily cause excessive damage to localized areas of the workpiece. In addition, current shot peening equipment has low efficiency in the recovery and reuse of shot, making it unsuitable for shot peening the inner walls of tubes or springs. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a high-efficiency shot peening device for the inner walls of pipes or springs. This device enables batch shot peening of the inner walls of pipes or springs, and achieves high shot peening uniformity, significantly improving the efficiency of shot peening for these special components and reducing processing costs. Specifically, the technical solution of this invention is as follows.

[0006] A high-efficiency shot peening device for the inner wall of a pipe or spring includes: a support plate, a flow guide plate, a first lifter, an integrated plate, a second lifter, a shot peening pipe, and a shot collection bin. The support plate is horizontally fixed and has uniformly distributed through holes on its surface. The flow guide plate is parallel to the support plate and fixedly connected to the first lifter above it. The integrated plate is inclined relative to the horizontal plane and positioned directly below the support plate, and is connected to the second lifter to drive its lifting and lowering. The sidewall of the shot peening pipe is uniformly covered with shot peening holes, and the upper end of the pipe is closed while the lower end is open. The shot peening pipe is vertically fixed to the upper surface of the integrated plate, with each through hole corresponding to one shot peening pipe, forming an array-type shot peening gun mechanism. The outer diameter of the shot peening pipe is smaller than the diameter of the through holes, allowing the shot peening pipe to enter the pipe or spring through the through holes. The shot collection bin has a conical structure and is located below the integrated plate to collect the shot discharged from the shot blasting pipe onto the integrated plate and then rolling down for recycling.

[0007] Furthermore, the shot peening pipe, shot storage tank, and air compressor are connected in sequence to use high-speed airflow to deliver the shot from the shot storage tank to the shot peening pipe for shot peening. The shot collection bin is connected to the shot storage tank.

[0008] Furthermore, it also includes a workpiece positioning device, wherein the upper end of the tapered tube has an outer edge plate, and the inner wall of the lower end has spaced protrusions. The through hole on the support plate is a tapered opening that matches the tapered tube, and the tapered tube is located in the through hole. The outer edge plate is supported on the upper surface of the support plate, and the shot peening pipe can enter and exit the lower end of the tapered tube.

[0009] Furthermore, the through hole is located in a groove on the upper surface of the support plate, and the outer edge plate is located in the groove and is flush with the upper surface of the support plate.

[0010] Furthermore, the inclination angle of the tapered sidewall of the tapered tube is 5~15°, so that the tube body or spring can be automatically aligned when placed in the tapered tube.

[0011] Furthermore, the integrated plate is tilted at an angle of 10 to 30° relative to the horizontal plane, so that the shot particles discharged downward from the through holes after shot peening can fall onto the integrated plate and automatically roll into the shot collection bin below for recycling.

[0012] Furthermore, the device also includes a removal mechanism for the workpiece positioning device, which comprises a hollow truncated cone and a handle. The hollow truncated cone contains an electromagnet, and is fixedly connected to the lower end of the handle. The hollow truncated cone can enter the tapered tube, with both sides adhering to each other.

[0013] Furthermore, the upper surface of the handle has a switch connected to the electromagnet to control the opening and closing of the electromagnet.

[0014] Furthermore, the lower surface of the flow guiding plate has a flexible sealing layer. Optionally, the flexible sealing layer is made of any one of rubber, plastic, etc.

[0015] Furthermore, a movable cleaning mechanism is provided on one side of the upper surface of the support plate, which can reciprocate between the two sides of the support plate to remove debris from the support plate. Optionally, the cleaning unit in the movable cleaning mechanism includes any one of a brush or a blower.

[0016] Compared with existing technologies, the present invention has at least the following beneficial technical effects: The shot peening equipment of the present invention adopts a novel structure different from traditional equipment of this type, enabling batch shot peening of the inner walls of tubes or springs, and achieving high shot peening uniformity, significantly improving the efficiency of shot peening for these special components and reducing processing costs. First, the present invention utilizes the support plate to achieve batch placement of tubes or springs to be processed, and then the guide plate presses the tubes or springs firmly onto the support plate. At this time, the integrated plate carries an array of shot peening tubes that penetrate into the inner cavity of the tube or spring through its through holes below the support plate. The shot peening tubes use the shot they spray in all directions to impact the inner wall of the tube or spring, achieving not only uniform coverage of the inner wall and reducing dead angles and blind spots, but also high efficiency. At the same time, when shot peening springs, the pressure of the guide plate can transform the unclosed sidewalls of the springs into a closed, tubular structure, thereby preventing shot from flying out from the gaps on the sides of the springs and improving the efficiency of shot peening. Furthermore, the guide plate seals the upper port of the tube or spring, ensuring that the carrier gas carrying the shot ejected from the shot peening pipe can only exit from the lower port of the tube or spring. This improves the efficiency of shot discharge and collection, preventing shot from splashing everywhere in the shot peening chamber and hindering collection. In addition, the shot peening equipment of this invention also features a workpiece positioning device detachably installed in the through hole of the support plate. This special structure, formed by the central tapered tube, the outer edge plate protruding from the upper port, and the inner protrusion at the lower port, not only allows for automatic alignment using the tapered hole and the tube or spring, but also ensures that the tube or spring and the shot peening pipe remain as coaxial as possible, improving the uniformity of the shot peening process. Simultaneously, the protrusion supports the tube or spring and also serves to remove impurities. Moreover, this detachably installed workpiece positioning device allows for changing the tube diameter by altering the thickness of the tapered tube's sidewall, making it suitable for positioning and installing tubes or springs of different diameters within a certain range without changing the size of the through hole in the support plate. Furthermore, it can also simultaneously process tubes or springs of different specifications. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 The following is a schematic diagram of the shot peening equipment in the embodiments below.

[0019] Figure 2 The following is a schematic diagram of the internal structure of the shot peening equipment in the embodiments below.

[0020] Figure 3 The following is a schematic diagram of the support plate in the embodiments.

[0021] Figure 4 The following is a schematic diagram of the array spray gun mechanism in the embodiments below.

[0022] Figure 5 The following is a schematic diagram of the workpiece positioning device in the embodiments below.

[0023] Figure 6 This is a top view of the workpiece positioning device in the following embodiments.

[0024] Figure 7 This is a cross-sectional view of the workpiece positioning device in the following embodiments.

[0025] Figure 8 The following is a schematic diagram of the structure of the extraction device in the embodiments below.

[0026] The markings in the above diagram represent: 1-support plate, 2-guide plate, 3-first lifter, 4-integrated plate, 5-second lifter, 6-shot peening pipe, 7-shot collection bin, 8-shot storage tank, 9-air compressor, 10-brush, 11-moving rod, 12-slider, 13-drive motor, 14-conical tube, 15-outer edge plate, 16-protrusion, 17-pipe body, 18-hollow truncated cone, 19-handle, 20-switch, 101-through hole, 102-groove, 201-shot peening chamber, 202-door, 203-support, 204-flexible sealing layer. Detailed Implementation

[0027] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves. They do not limit the structure and are merely for the purpose of facilitating the description of this invention and simplifying the description. They do not indicate or imply that the device or component referred to needs to have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] The high-efficiency shot peening equipment for the inner wall of tubes or springs of the present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0031] refer to Figures 1 to 4 Example of a high-efficiency shot peening device for the inner wall of a pipe or spring, which mainly includes the following components: a support plate 1, a guide plate 2, a first lifter 3, an integrated plate 4, a second lifter 5, a shot peening pipe 6, and a shot collection bin 7. Specifically: the support plate 1 is horizontally fixed, and its surface has a plurality of through holes 101 evenly distributed. The diameter of the through holes 101 is between the inner diameter and the outer diameter of the inner wall of the pipe or spring to be treated, so as to both support the bottom end of the inner wall of the pipe or spring and allow the shot particles in the inner wall of the pipe or spring to be discharged from the lower end of the pipe or spring after shot peening.

[0032] The flow guiding plate 2 is arranged parallel to the support plate 1 directly above it, and the flow guiding plate 2 is fixedly connected to the lower end of the lifting rod of the first lifting device 3 above it. The first lifting device 3 can be a hydraulic lifting device, etc., to drive the flow guiding plate 2 to rise and fall. In a more specific embodiment, refer to... Figure 1 The support plate 1 and the flow guide plate 2 can be installed in the shot peening chamber 201. The first lifter 3 is installed above the shot peening chamber 201, and its lifting rod passes through the top wall of the shot peening chamber 201 and is fixedly connected to the center of the upper surface of the flow guide plate 2. The shot peening chamber 201 has an openable and closable hatch 202 to allow for the loading and unloading of pipes or springs to be shot peened. The shot peening chamber 201 is supported on the ground by a bracket 203 so that the shot collection bin 7 can be installed at the bottom of the shot peening chamber 201. It should be understood that any other suitable shot peening chamber can also be used to confine the shot peening process to a closed space to prevent shot splashing.

[0033] The integrated plate 4 is inclined relative to the horizontal plane and positioned directly below the support plate 1. The side of the integrated plate 4 is fixedly connected to the lifting rod (such as a hydraulic rod or electric push rod) of the second lifting device 5, thereby driving the integrated plate 4 to rise and fall. The sidewall of the shot peening pipe 6 is evenly covered with shot peening holes, and the upper end of the shot peening pipe 6 is closed, while the lower end is open. The shot peening pipe 6 is vertically fixed to the upper surface of the integrated plate 4, and each through hole 101 on the support plate 1 corresponds to one shot peening pipe 6, thus forming an array-type spray gun mechanism. The outer diameter of the shot peening pipe 6 is smaller than the diameter of the through hole 101, so that the shot peening pipe 6 can enter the pipe body or spring through the through hole 101. Simultaneously, the integrated plate 4 has an opening communicating with the lower end of the shot peening pipe 6, so that shot for shot peening can be transported from below the integrated plate 4 into the shot peening pipe 6. During shot peening, the lower end of the shot peening pipe 6 is connected to the shot storage tank 8 via a sealed connecting pipe, and the shot storage tank 8 is connected to the air compressor 9. The shot storage tank 8 stores the shot required for shot peening. After the high-speed airflow provided by the air compressor 9 enters the shot storage tank 8, it pushes the shot in the tank through the sealed connecting pipe to the shot peening pipe 6, and sprays it at high speed from its shot peening holes onto the inner wall of the pipe or spring, causing slight plastic deformation on its surface, thereby increasing surface hardness, relieving stress, enhancing fatigue strength, and cleaning oxide layers or coatings.

[0034] The shot collection chamber 7 has a conical structure and is located on the bottom surface of the shot peening chamber 201 below the integrated plate 4, and is in communication with the shot peening chamber 201. The bottom of the shot collection chamber 7 is connected to the shot storage tank 8 located below it, so as to collect the shot discharged from the integrated plate 4 and add it back to the shot storage tank 8 for reuse. When shot peening is required on the inner wall of the tube or spring, the hatch 202 of the shot peening chamber 201 is opened, and then the tube or spring is placed on the support plate 1, and the lower end of the tube or spring is aligned with the through hole 101 on the support plate 1, so that the lower end is fully exposed in the through hole 101. Then the first lifter 3 is activated to drive the guide plate 2 to descend and press down on the tube or spring, so that it is pressed tightly onto the support plate 1. Then, the second lifting device 5 is activated to drive the array spray gun mechanism upward, causing the shot peening pipe 6 to enter the pipe body or spring. It should be understood that at this time, the integrated plate 4 is not attached to the support plate 1, but there is a gap between them, for example, the gap height is 2cm, 3cm, etc. In addition, the shot peening holes are not provided on the side wall of this part of the shot peening pipe 6 located outside / below the pipe body or spring. Finally, the air compressor 9 and other equipment are activated to use high-speed airflow / carrier air to send the shot in the shot storage tank 8 into the shot peening pipe 6. Then, the shot is evenly sprayed out from the shot peening holes on the side wall of the shot peening pipe 6 and impacts the inner wall of the pipe body or spring. After impact, the shot is discharged from the lower port and through hole 101 of the pipe body or spring and falls onto the integrated plate 4. Since the integrated plate 4 is inclined, the shot that falls on its upper surface can automatically roll off, thereby preventing accumulation on the integrated plate 4 and facilitating the recycling of shot. Optionally, the tilt angle of the integrated plate 4 relative to the horizontal plane can be arbitrarily selected between 10° and 30°, such as 10°, 15°, 20°, 25°, 30°, etc., or any other suitable angle can be used.

[0035] First, the shot peening equipment in this embodiment can perform batch shot peening of the inner walls of tubes or springs. Furthermore, the shot particles sprayed from the shot peening pipe 6 impact the inner walls of the tubes or springs, resulting in more uniform coverage and effectively avoiding dead zones or blind spots. This significantly improves the efficiency of shot peening for special components like tubes or springs, while reducing processing costs. Second, when shot peening springs, the pressure of the guide plate 2 transforms the unclosed sidewalls of the springs into a closed, tubular structure, preventing shot particles from flying out from the gaps on the sides of the springs and improving the efficiency of shot peening. Third, the guide plate 2 seals the upper port of the tube or spring, ensuring that the carrier gas ejected from the shot peening pipe 6 carrying the shot particles can only exit from the lower port of the tube or spring. This improves the efficiency of shot discharge and collection, preventing shot from splashing everywhere in the shot peening chamber and hindering collection.

[0036] In another implementation, refer to Figure 2 In the above embodiment, a movable cleaning mechanism is also provided on one side of the upper surface of the support plate 1 of the shot peening equipment. The cleaning unit (such as a brush 10) is fixed to a movable rod 11. One end of the movable rod 11 is slidably connected to a sliding rod via a slider 12, and the other end is threadedly connected to a lead screw via a slider. One end of the lead screw is connected to a drive motor 13 to drive the lead screw to reciprocate, thereby causing the brush 10 to clean the shot, debris, etc., on the upper surface of the support plate 1. After cleaning, the brush 10 is driven to the side of the shot peening chamber 201. Alternatively, a blowpipe can be used as the cleaning unit. The blowpipe has inclined air jets facing the upper surface of the support plate 1. The blowpipe is connected to an air delivery mechanism to deliver air into the blowpipe to blow the support plate 1.

[0037] In another implementation, refer to Figure 2 In the shot peening equipment described above, a flexible sealing layer 204 is fixed on the lower surface of the flow guide plate 2. The material of the sealing layer 204 can be selected from rubber, plastic, etc. The flexible sealing layer 204 not only provides a better seal for the upper port of the tube or spring, but also helps to reduce the impact of the shot on the flow guide plate 2, avoiding an increase in the surface roughness of the flow guide plate 2, which would reduce the sealing effect on the upper port of the tube or spring and reduce the discharge efficiency of the shot.

[0038] In another embodiment, the shot peening equipment of the above embodiments further includes a workpiece positioning device. Specifically, refer to... Figure 5 , Figure 6 and Figure 7 The tapered tube 14 of the workpiece positioning device has an outer edge plate 15 on the outer wall of its upper port / larger diameter port. This outer edge plate can be circular or square, as long as it can support the tapered tube 14 on the support plate 1 when it is located in the through hole 101 on the support plate 1. The inclination angle of the tapered sidewall of the tapered tube 14 can be arbitrarily selected between 5 and 15°, such as 5°, 10°, 15°, etc.

[0039] The inner wall of the lower port / smaller diameter port of the tapered tube 14 has several spaced protrusions 16, and in this embodiment, there are four protrusions 16. The through hole 101 is a tapered opening that matches the tapered tube 14. In use, the tapered tube 14 is located in the through hole 101, the outer edge plate 15 is supported on the upper surface of the support plate 1, and the outer side wall of the tapered tube 14 is attached to the side wall of the through hole 101, thereby keeping the tapered tube 14 stable. The shot peening pipe 6 can enter and exit the lower port of the tapered tube 14. In use, the lower end of the tube body or spring is placed in the tapered tube 14. At this time, the special structure formed by the middle tapered tube 14, the outer edge plate 15 protruding from the upper port, and the protrusions 16 protruding from the lower port in this embodiment can not only automatically center the tapered hole and the tube body 17 or spring, but also keep the tube body or spring and the shot peening pipe 6 as coaxial as possible, thereby improving the uniformity of shot peening. Meanwhile, the protrusion 16 not only supports the tube or spring but also removes impurities, preventing impurities deposited in the tapered tube 14 from affecting the placement of the tube or spring. Furthermore, this detachable workpiece positioning device of this embodiment allows for changing the tube diameter by altering the thickness of the sidewall of the tapered tube 14, thus making it suitable for positioning and installing tubes or springs of different diameters within a certain range without changing the size of the through hole 101 in the support plate 1. This also enables simultaneous processing of tubes or springs of different specifications.

[0040] In another implementation, refer to Figure 7 In the above embodiment, each of the through holes 101 on the upper surface of the support plate 1 of the shot peening equipment has a groove 102 distributed around it in a circumferential direction, and when the outer edge plate 15 is located in the groove 102, the upper surface of the outer edge plate 15 is flush with the upper surface of the support plate 1.

[0041] In another embodiment, the shot peening equipment of the above embodiments further includes a removal device for the workpiece positioning device. See details. Figure 8 The removal device includes a hollow truncated cone 18 and a handle 20. An electromagnet is installed in the hollow truncated cone 18, which is fixedly connected to the lower end of the vertically positioned handle 20. The hollow truncated cone 18 can enter the tapered tube 14, with both sides of the cone adhering to each other. In use, the operator holds the upper end of the handle 20, places the hollow truncated cone 18 into the tapered tube 14, and then activates the electromagnet to magnetically connect the hollow truncated cone 18 and the tapered tube 14, facilitating the removal of the workpiece positioning device from the through hole 101. Turning off the electromagnet disengages the hollow truncated cone 18 from the tapered tube 14, facilitating the removal of the next workpiece positioning device. In a preferred embodiment, the upper surface of the handle 20 has a switch 19 connected to the electromagnet for more convenient control of the electromagnet's operation.

[0042] Finally, it should be noted that any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention. Although specific embodiments of this invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this invention are still within the scope of protection of this invention.

Claims

1. A high-efficiency shot peening device for the inner wall of a spring, characterized in that, include: A support plate, which is horizontally fixed and has uniformly distributed through holes on its surface; A flow guide plate is arranged parallel above the support plate and is fixedly connected to the first lifter above it. An integrated plate is disposed at an angle relative to the horizontal plane directly below the support plate, and the integrated plate is connected to the second lifter; The shot peening tube has shot peening holes evenly distributed on its sidewall, and the upper end of the shot peening tube is closed and the lower end is open. The shot peening tube is vertically fixed on the upper surface of the integrated plate. Each through hole corresponds to a shot peening tube to form an array-type spray gun mechanism. The outer diameter of the shot peening tube is smaller than the diameter of the through hole. A pellet collection bin, which has a conical structure, is located below the integrated plate; When the spring is shot peened, the unclosed sidewall of the spring is transformed into a closed tubular structure by the pressure of the flow guide plate, and the flow guide plate forms a seal on the upper port of the spring.

2. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 1, characterized in that, The shot peening pipe, shot storage tank, and air compressor are connected in sequence so that high-speed airflow can be used to send the shot from the shot storage tank into the shot peening pipe for shot peening; the shot collection bin is connected to the shot storage tank.

3. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 1, characterized in that, It also includes a workpiece positioning device, wherein the upper end of the tapered tube has an outer edge plate and the inner wall of the lower end has spaced protrusions; the through hole on the support plate is a tapered opening that matches the tapered tube, and the tapered tube is located in the through hole; the outer edge plate is supported on the upper surface of the support plate, and the shot peening pipe can enter and exit the lower end of the tapered tube.

4. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 3, characterized in that, The through hole is located in a groove on the upper surface of the support plate, and the outer edge plate is located in the groove and is flush with the upper surface of the support plate.

5. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 3, characterized in that, The inclination angle of the tapered sidewall of the tapered tube is 5 to 15 degrees.

6. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 3, characterized in that, It also includes a removal device for the workpiece positioning device, which includes a hollow truncated cone and a handle. The hollow truncated cone contains an electromagnet and is fixedly connected to the lower end of the handle. The hollow truncated cone can enter the tapered tube and the two are in contact with each other on their sidewalls.

7. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 6, characterized in that, The upper surface of the handle has a switch connected to the electromagnet to control the opening and closing of the electromagnet.

8. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 1, characterized in that, The angle of inclination of the integrated board relative to the horizontal plane is 10 to 30 degrees.

9. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 1, characterized in that, The lower surface of the flow guide plate has a flexible sealing layer.

10. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 9, characterized in that, The flexible sealing layer can be made of either rubber or plastic.

11. The high-efficiency shot peening equipment for the inner wall of a spring according to any one of claims 1-10, characterized in that, A movable cleaning mechanism is also provided on one side of the upper surface of the support plate, which can reciprocate between the two sides of the support plate.

12. The high-efficiency shot peening equipment for the inner wall of a spring according to claim 11, characterized in that, The cleaning unit in the mobile cleaning mechanism includes either a brush or a blower.

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