A testing machine for detecting the adhesion properties of capsule skin

Abstract

This utility model discloses a testing machine for detecting the adhesion performance of a capsule skin, including a steel ring drive mechanism. The steel ring drive mechanism drives a steel ring to reciprocate inside and outside the capsule skin to simulate the working conditions of the capsule skin. The driving torque of the steel ring drive mechanism can be adjusted to facilitate the detection of the wear and delamination degree of the capsule skin under different steel ring drive torques. This application simulates the wear of the capsule skin under actual working conditions by setting a steel ring drive mechanism to drive the steel ring to reciprocate inside the capsule skin and rubbing the steel ring against the capsule skin wall. The movement stroke of the steel ring driven mechanism inside the capsule skin is adjusted to change the driving torque of the steel ring. Based on the delamination of the capsule skin after testing with different driving torques, the influence of wear caused by different steel ring drive torques on the adhesion performance of the capsule skin can be determined, the range of wear torques that the capsule skin can withstand is evaluated, and the adhesion performance of the capsule skin can be tested, providing experimental support for the production and research and development of capsule skins.

Description

Technical Field

[0001] This utility model relates to the field of material mechanical property testing technology, specifically to a testing machine for detecting the adhesion performance of capsule skin. Background Technology

[0002] With the increasing popularity of electric vehicles, their heavier weight and unique driving characteristics pose more stringent challenges to suspension systems. Air suspension, due to its unique advantages, has become a key technology for addressing these challenges. The air suspension system has a complex structure, and as the core component of the air spring, the performance of the air spring skin is crucial. Therefore, the adhesion between the inner and outer layers of the air spring skin has become a critical indicator that receives considerable attention.

[0003] Currently, quality testing for air spring skins generally focuses on fatigue life and peel tests. Existing testing equipment cannot effectively test the adhesion performance between the inner and outer layers of the skin. Utility Model Content

[0004] To address the shortcomings of existing technologies, a testing machine for detecting the adhesion performance of the capsule shell is proposed, which solves the problem that existing testing equipment cannot effectively detect the adhesion performance between the inner and outer layers of the capsule shell.

[0005] To achieve the above objectives, the present invention proposes the following technologies:

[0006] A testing machine for detecting the adhesion performance of a capsule skin includes a steel ring drive mechanism. The steel ring drive mechanism drives a steel ring to reciprocate in and out of the capsule skin to simulate the working conditions of the capsule skin. The driving torque of the steel ring drive mechanism can be adjusted to facilitate the detection of the degree of wear and delamination of the capsule skin under different steel ring driving torques.

[0007] Furthermore, it also includes an expansion mechanism for stretching the opening of the expansion sac to facilitate the steel ring drive mechanism to drive the steel ring into the sac.

[0008] Furthermore, the expansion mechanism includes several stretching claws arranged in a circular array. After clamping the bladder skin, the stretching claws move horizontally to enlarge the opening size at the end of the bladder skin, making it easier for the steel ring to extend into the bladder skin.

[0009] Furthermore, the steel ring driving mechanism includes a driving unit and a fixed shaft for fixing the steel ring. The fixed shaft is connected to the driving unit in a transmission manner, and the driving unit drives the fixed shaft to reciprocate to realize the insertion and removal of the steel ring in the bladder.

[0010] Furthermore, it also includes a clamping mechanism disposed opposite to the expansion mechanism, the clamping mechanism clamping the end of the bladder skin away from the expansion mechanism, so as to prevent the bladder skin from being driven to flip over when the steel ring comes out.

[0011] Furthermore, the clamping mechanism includes two opposing clamping heads and a mandrel that can be inserted into the bladder skin. The two clamping heads approach each other and press the bladder skin against the periphery of the mandrel to fix the end of the bladder skin.

[0012] Furthermore, the steel ring drive mechanism also includes a guide unit, which includes a guide plate fixedly connected to the fixed shaft. The two ends of the guide plate are respectively sleeved on the optical shaft and slidably connected to the optical shaft. The two optical shafts are fixedly connected to the drive mechanism through a positioning plate.

[0013] Furthermore, the stretching gripper includes an inner hook mouth and an outer pressure block. The outer pressure block is driven by a first telescopic cylinder to clamp the cyst skin near the inner hook mouth. Then, a second telescopic cylinder connected to the inner hook mouth drives the stretching gripper and the clamped cyst skin to move outward to expand the opening of the cyst skin.

[0014] Furthermore, the inner hook nozzle is fixedly installed at the end of the sliding plate, the first telescopic cylinder is located above the sliding plate, and the sliding plate is fixedly connected to the output end of the second telescopic cylinder so that the second telescopic cylinder can drive the overall movement of the stretching gripper.

[0015] Furthermore, a slide rail is fixedly connected to the lower part of the sliding plate, and the slide rail is slidably connected inside the slider. The slider is fixedly installed above the fixed seat, and the second telescopic cylinder extends and retracts to drive the sliding plate to slide relative to the fixed seat.

[0016] Compared with the prior art, the comprehensive effects brought about by this utility model include:

[0017] This application uses a steel ring drive mechanism to drive a steel ring to reciprocate within the skin. By rubbing the steel ring against the skin wall, the wear of the skin under actual working conditions is simulated. The stroke of the steel ring drive mechanism within the skin is adjusted to change the driving torque. Based on the delamination of the skin after tests with different driving torques, the impact of wear caused by different steel ring driving torques on the skin's adhesive performance is determined, and the range of wear torques that the skin can withstand is evaluated. This enables the testing of the skin's adhesive performance and provides experimental support for the production and research and development of skins. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a front view schematic diagram of the internal structure of an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the shell structure of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the expansion mechanism structure according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the stretching gripper structure according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the steel ring drive mechanism in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the clamping mechanism in an embodiment of the present invention.

[0025] Legend: 1. Housing; 2. Clamping mechanism; 3. Expansion mechanism; 4. Fourth telescopic cylinder; 5. Steel ring drive mechanism; 6. Placement hole; 7. Shell; 8. Inner hook nozzle; 9. Upper partition plate; 10. Tensioning jaw; 11. Outer pressure block; 12. Second telescopic cylinder; 13. Slider; 14. Sliding plate; 15. First telescopic cylinder; 16. Optical axis; 17. Fifth telescopic cylinder; 18. Steel ring; 19. Fixed shaft; 20. Fixed plate; 21. Connecting plate; 22. Clamping head; 23. Mandrel; 24. U-shaped seat; 25. Third telescopic cylinder; 26. Optical axis; 27. Control unit; 28. Connecting plate. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In this document, terms such as “up,” “down,” “left,” “right,” and “top” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figures 1 to 7 As shown, a testing machine for detecting the adhesion performance of the skin 7 includes a steel ring drive mechanism 5. The steel ring drive mechanism 5 drives the steel ring 18 to reciprocate in and out of the skin 7 to simulate the working conditions of the skin 7. The driving torque of the steel ring drive mechanism 5 can be adjusted, which facilitates the detection of the wear and delamination degree of the skin 7 under different steel ring driving torques.

[0029] With the above setup, the steel ring drive mechanism 5 drives the steel ring 18 to reciprocate within the skin 7. By rubbing the steel ring 18 against the wall of the skin 7, the wear condition of the skin 7 under actual working conditions is simulated. The movement stroke of the steel ring drive mechanism 5 within the skin 7 is adjusted to change the driving torque of the steel ring. Based on the delamination of the skin 7 after different driving torque tests, the impact of wear caused by different steel ring driving torques on the adhesive performance of the skin 7 is determined, the range of wear torque that the skin 7 can withstand is evaluated, and the adhesive performance of the skin 7 is tested, providing experimental support for the production and research and development of the skin 7.

[0030] The testing machine for detecting the adhesion performance of the capsule skin in this embodiment also includes an expansion mechanism 3, which is used to stretch and expand the opening of the capsule skin 7 so that the steel ring drive mechanism 5 can drive the steel ring 18 to extend into the capsule skin 7.

[0031] Before processing, the bladder 7 used for processing air springs is cylindrical and usually has a small diameter. In order to facilitate the steel ring 18 to extend into the bladder 7 and rub against the inner wall of the bladder 7, an expansion mechanism 3 is provided to expand the opening at the end of the bladder 7. After the steel ring 18 enters through the large diameter opening, it expands and rubs other smaller diameter parts of the bladder 7 to simulate the wear conditions of the air spring in actual use.

[0032] Preferably, the expansion mechanism 3 is located below the bladder skin 7, and expands the bladder skin 7 from the bottom, so that the steel ring drive mechanism 5 can drive the steel ring 18 to extend into the bladder skin 7 from below.

[0033] Specifically, the expansion mechanism 3 includes several stretching claws 10 arranged in a circular array. After clamping the bladder skin 7, the stretching claws 10 move in the horizontal direction to enlarge the opening size at the end of the bladder skin 7, so that the steel ring 18 can be inserted into the bladder skin 7.

[0034] Multiple tension grippers 10 are arranged along the circumference, so that there is enough space between the tension grippers 10 to accommodate the reciprocating motion of the steel ring 18, thereby realizing the wear test of the bladder skin 7. The tension grippers 10 slide radially along the circumference they form, thereby pulling the bladder skin 7 radially after clamping the bottom edge of the bladder skin 7, thereby expanding the diameter and making it easier for the steel ring 18 to extend into the bladder skin 7.

[0035] In this embodiment, the testing machine also includes a frame mechanism, which supports and protects each working mechanism. The frame mechanism includes a housing 1, with two partition plates in the middle of the housing 1, forming a sandwich between the partition plates. The tension gripper 10 is installed in the sandwich. The upper partition plate 9 has a placement hole 6 for placing the bladder skin 7 onto the tension gripper 10. The lower partition plate has a lifting hole for the steel ring 18 to pass through. The steel ring drive mechanism 5 is installed in the cavity below the lower partition plate. The various spaces separated by the housing 1 structure and the partition plates separate and protect each working mechanism.

[0036] In the testing machine for detecting the adhesion performance of the capsule skin in this embodiment, the tensile gripper 10 includes an inner hook nozzle 8 and an outer pressure block 11. After the outer pressure block 11 is driven by the first telescopic cylinder 15 to clamp the capsule skin 7 near the inner hook nozzle 8, the second telescopic cylinder 12 connected to the inner hook nozzle 8 drives the tensile gripper 10 and the clamped capsule skin 7 to move outward to expand the opening of the capsule skin 7.

[0037] With the above setup, the second telescopic cylinder 12 extends to bring the inner hook nozzle 8 closer, and multiple inner hook nozzles 8 form a circle with a diameter matching the inner diameter of the bladder skin 7. The bladder skin 7 is placed outside the circle. Then, the first telescopic cylinder 15 extends to bring the outer pressure block 11 closer to the inner hook nozzle 8 to clamp the bladder skin 7 from the outside. Then, the second telescopic cylinder 12 is controlled to retract, causing the inner hook nozzle 8, the outer pressure block 11, and the first telescopic cylinder 15, which are in the clamping state, to move radially outward, thereby expanding the opening diameter of the bladder skin 7.

[0038] Specifically, the inner hook nozzle 8 has an arc-shaped surface that contacts the bladder skin 7, thereby improving the tightness of the fit between the inner hook nozzle 8 and the inner wall of the bladder skin 7 and enhancing the clamping stability. Preferably, the top of the inner hook nozzle 8 has a protrusion facing the bladder skin 7, further improving the clamping effect on the bladder skin 7. Correspondingly, the surface of the outer pressure block 11 that contacts the bladder skin 7 is an arc-shaped surface that matches the inner hook nozzle 8. The height of the outer pressure block 11 is lower than the protrusion to facilitate fitting. The two arc-shaped surfaces clamp the bladder skin 7 from both the inner and outer sides, improving the clamping stability.

[0039] Preferably, grooves are provided on the arc surfaces of the inner hook nozzle 8 and the outer pressure block 11, and the groove structure enhances the friction between the arc surface and the surface of the bladder skin 7.

[0040] In this embodiment, the testing machine is also equipped with a control unit 27. The control unit 27 controls the telescopic movements of each telescopic cylinder, thereby controlling the stretching and expansion of the bladder skin 7 and the insertion and removal of the steel ring 18. The second telescopic cylinder 12, which drives the stretching gripper 10 and the stretching of the bladder skin 7, is connected to the control unit 27. The drive unit of the steel ring drive structure 5 is also connected to the control unit 27. The control unit 27 controls the distance of the stretching movement of the bladder skin 7 by the second telescopic cylinder 12, that is, adjusts the expansion radius of the bottom opening of the bladder skin 7, thereby adjusting the stretching torque of the second telescopic cylinder 12. This facilitates the detection of the delamination of the bladder skin 7 under different stretching torques, and thus obtains the limit value of the stretching torque that the bladder skin 7 can withstand, providing a reference for the improvement of the bladder skin 7 production process.

[0041] Specifically, when the second telescopic cylinder 12 drives the bladder skin 7 to reach the set expansion diameter, the second telescopic cylinder 12 reads the tensile torque parameter at this time and transmits the value to the control unit 27 for display and storage, so that the staff can record the delamination tearing of the bladder skin 7 under different tensile torques, thereby obtaining the limit value as a research and development reference.

[0042] By combining the control of the tensile torque with the driving torque of the steel ring in the steel ring drive mechanism 5, the adhesive performance of the skin 7 is tested from different angles. After the test by the testing machine, the delamination of the skin 7 after the test is helpful to analyze the influencing factors of the adhesive performance of the skin 7 according to the change law of the torque value, and provide more reference for the production of skin 7 with excellent performance.

[0043] In the testing machine for detecting the adhesion performance of the capsule skin in this embodiment, the inner hook nozzle 8 is fixedly installed at the end of the sliding plate 14, the first telescopic cylinder 15 is located above the sliding plate 14, and the sliding plate 14 is fixedly connected to the output end of the second telescopic cylinder 12 so that the second telescopic cylinder 12 can drive the overall movement of the stretching gripper 10.

[0044] Specifically, the inner hook nozzle 8 is set perpendicular to the sliding plate 14, the first telescopic cylinder 15 is fixed on the sliding plate 14, and a guide rail is also set above the sliding plate 14. A guide groove is opened on the corresponding outer pressure block 11. The guide rail and the guide groove cooperate to guide the movement of the outer pressure block 11 along the radial direction of the skin 7, thereby improving the alignment effect with the inner hook nozzle 8. The second telescopic cylinder 12 drives the sliding plate 14 and the first telescopic cylinder 15 above it, as well as the stretching claw 10, to move along the radial direction of the skin 7, thereby stretching or resetting the skin 7, which facilitates the testing of the adhesion performance of the skin 7.

[0045] In this embodiment, a slide rail is fixedly connected to the lower part of the sliding plate 14. The slide rail is slidably connected inside the slider 13. The slider 13 is fixedly installed above the fixed seat. The second telescopic cylinder 12 extends and retracts to drive the sliding plate 14 to slide relative to the fixed seat.

[0046] Specifically, the slide rail is slidably connected in the groove opened at the top of the slider 13. The fixed seat is fixedly connected to the end of the second telescopic cylinder 12. The output end of the second telescopic cylinder 12 passes through the fixed seat and reciprocates below the slider 13 and the slide rail. A connecting plate 28 is provided on one side of the slide rail. The two ends of the connecting plate 28 are fixedly connected to the slide rail and the output end of the second telescopic cylinder 12, respectively. Through the above structure, the second telescopic cylinder 12 drives the slide rail and the sliding plate 14. The slide rail slider 13 structure guides the movement of the sliding plate 14.

[0047] Preferably, the fixed seat is fixedly installed below the lower partition plate, and two sliders 13 are arranged radially along the skin 7. Both sliders 13 are fixedly connected to the upper surface of the lower partition plate. The lower partition plate has a push groove corresponding to the connecting plate 28, so that the connecting plate 28 can reciprocate to drive the sliding plate 14 and the stretching claw 10 to move closer to or away from the skin 7.

[0048] In the testing machine for detecting the adhesion performance of the capsule skin in this embodiment, the steel ring drive mechanism 5 includes a drive unit and a fixed shaft 19 for fixing the steel ring 18. The fixed shaft 19 is connected to the drive unit for transmission. The drive unit drives the fixed shaft 19 to reciprocate so as to realize the insertion and removal of the steel ring 18 in the capsule skin 7.

[0049] Specifically, the top of the steel ring 18 is detachably connected to the fixed shaft 19. The steel ring 18 and the fixed shaft 19 are coaxially installed. The drive unit drives the fixed shaft 19 to rise and fall in the vertical direction, thereby enabling the steel ring 18 to change its height among several tension grippers 10, so as to extend into or out of the bladder 7.

[0050] In this embodiment, the steel ring drive mechanism 5 further includes a guide unit, which includes a guide plate fixedly connected to the fixed shaft 19. The two ends of the guide plate are respectively sleeved on the optical shaft 16 and slidably connected to the optical shaft 16. The two optical shafts 16 are fixedly connected to the drive unit through a positioning plate.

[0051] The bottom end of the fixed shaft 19 is fixedly connected to the middle of the guide plate. A connecting block is installed below the guide plate corresponding to the fixed shaft 19. The connecting block is connected to the output end of the drive unit. With the above arrangement, when the drive unit extends and retracts to drive the fixed shaft 19 and the steel ring 18 to move in the vertical direction, the optical shafts 16 on both sides guide the guide plate respectively to avoid the steel ring 18 from deflecting during movement, which would cause uneven contact between the steel ring 18 and the inner wall of the bladder 7 and affect the accuracy of the bladder 7 wear test.

[0052] Specifically, the drive unit is the fifth telescopic cylinder 17, which is signal-connected to the control unit 27. The control unit 27 controls the distance that the fifth telescopic cylinder 17 drives the steel ring 18 to reciprocate within the skin 7, facilitating the adjustment of the steel ring drive torque. This allows for a quantitative assessment of the impact of wear between the steel ring 18 and the skin 7 on the adhesion performance between the layers of the skin 7 under different steel ring drive torques. It also detects the impact of vertical force on the adhesion performance between the layers of the skin 7. Combined with the tensile torque of the drive tension gripper 10, this provides support for the research and development of improved product performance.

[0053] The testing machine for detecting the adhesion performance of the capsule skin in this embodiment also includes a clamping mechanism 2 disposed opposite to the expansion mechanism 3. The clamping mechanism 2 clamps the end of the capsule skin 7 away from the expansion mechanism 3 to prevent the capsule skin 7 from being driven to flip over when the steel ring 18 comes out.

[0054] The clamping mechanism 2 is located above the bladder skin 7. When the steel ring 18 is inserted into the bladder skin 7 to a certain depth and needs to be pulled out, the clamping mechanism 2 clamps the top of the bladder skin 7 and limits it in the vertical direction. This prevents the steel ring 18 from moving the bladder skin 7 downward due to the friction between the steel ring 18 and the inner wall of the bladder skin 7, which would make it difficult for the steel ring 18 to come out and affect the wear test of the steel ring 18 reciprocating in and out.

[0055] Specifically, the clamping mechanism 2 includes two opposing clamping heads 22 and a spindle 23 that can be inserted into the bladder skin 7. The two clamping heads 22 approach each other and press the bladder skin 7 against the periphery of the spindle 23 to fix the end of the bladder skin 7.

[0056] After the bottom end of the mandrel 23 is inserted into the bladder 7, the clamping heads 22 on both sides move closer to the mandrel 23 simultaneously, thereby clamping the bladder 7 on the outer surface of the mandrel 23, thus limiting the bladder 7, so that the steel ring drive mechanism 5 can drive the steel ring 18 to move downward and exit from the bladder 7.

[0057] Preferably, the side of the clamping head 22 near the spindle 23 is set as an arc-shaped surface, which matches the cylindrical structure of the bladder skin 7 and also matches the shape of the spindle 23, thereby improving the fit between the clamping head 22 and the outer wall of the bladder skin 7, ensuring the clamping effect on the bladder skin 7, and achieving effective positioning.

[0058] The top end of the spindle 23 is fixedly connected to the U-shaped seat 24. The opening of the U-shaped seat 24 faces downward. The bottom ends of its two side plates are respectively provided with third telescopic cylinders 25 for driving the movement of the clamping head 22. The two third telescopic cylinders 25 are horizontally and oppositely arranged. The spindle 23 is located in the middle of the two side plates, ensuring that the two clamping heads 22 move closer to or away from the spindle 23 synchronously to clamp or release the bladder skin 7, so that the bladder skin 7 is subjected to uniform force.

[0059] The clamping mechanism 2 is fixedly installed on the top of the housing 1. The U-shaped seat 24 is located in the cavity above the upper partition plate 9. The U-shaped seat 24 moves up and down in the cavity to approach or move away from the sac skin 7, clamping or releasing the sac skin 7.

[0060] Preferably, the output end of the fourth telescopic cylinder 4 is fixedly connected to the upper part of the U-shaped seat 24 corresponding to the mandrel 23. The fourth telescopic cylinder 4 drives the U-shaped seat 24, the mandrel 23 and the clamping head 22 to upgrade synchronously, so as to avoid affecting the placement and removal of the bladder skin 7 at the test position.

[0061] Another set of optical axes 26 is fixedly installed on the top of the U-shaped seat 24. The two optical axes 26 are symmetrically arranged on the U-shaped seat 24. The top ends of the two are fixedly connected to the connecting plate 21. The middle of the connecting plate 21 is provided with a clearance hole for installing the fourth telescopic cylinder 4. The fourth telescopic cylinder 4 is fixedly installed on the frame of the testing machine through the fixing plate 20. The output end of the fourth telescopic cylinder 4 extends through the fixing plate 20 to the optical axes 26 to connect the U-shaped seat 24. The two sides of the fixing plate 20 are slidably connected to the optical axes 26 through sleeves. The reciprocating movement of the optical axes 26 in the sleeves guides the lifting and lowering of the U-shaped seat 24.

[0062] Preferably, a limiting post runs through the fixed plate 20 and is fixedly connected to the fixed plate 20. The upper and lower ends of the limiting post extend to both sides of the fixed plate 20. The limiting post limits the sliding stroke of the optical axis 26 in the sleeve, so as to avoid the connecting plate being too low and colliding with the fixed plate 20, and to avoid the U-shaped seat 24 being too high and colliding with the fixed plate 20, thus avoiding damage to the parts.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "rotation", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] Although embodiments of the present invention have been shown and described in detail, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing machine for detecting the bonding properties of a capsule skin, characterized in that, It includes a steel ring drive mechanism, which drives the steel ring to reciprocate in and out of the bladder to simulate the working conditions of the bladder. The driving torque of the steel ring drive mechanism can be adjusted, which facilitates the detection of the wear and delamination degree of the bladder under different steel ring driving torques.

2. A test machine for detecting the adhesion properties of a capsule skin according to claim 1, characterized in that, It also includes an expansion mechanism for stretching the opening of the sac to allow the steel ring drive mechanism to drive the steel ring into the sac.

3. A test machine for detecting the adhesion properties of a capsule skin according to claim 2, characterized in that, The expansion mechanism includes several stretching claws arranged in a circular array. After clamping the bladder skin, the stretching claws move horizontally to enlarge the opening size at the end of the bladder skin, making it easier for the steel ring to extend into the bladder skin.

4. The test machine for detecting the adhesion of a leather according to claim 1, wherein The steel ring drive mechanism includes a drive unit and a fixed shaft for fixing the steel ring. The fixed shaft is connected to the drive unit for transmission. The drive unit drives the fixed shaft to reciprocate to realize the insertion and removal of the steel ring in the bladder.

5. A test machine for detecting the adhesion performance of a capsule skin according to claim 2, characterized in that, It also includes a clamping mechanism disposed opposite to the expansion mechanism, the clamping mechanism clamping the end of the bladder skin away from the expansion mechanism, so as to prevent the bladder skin from being driven to flip over when the steel ring comes out.

6. The testing machine for detecting the adhesion performance of capsule skin according to claim 5, characterized in that, The clamping mechanism includes two opposing clamping heads and a mandrel that can be inserted into the bladder skin. The two clamping heads approach each other and press the bladder skin against the periphery of the mandrel to fix the end of the bladder skin.

7. A test machine for detecting the adhesion properties of a capsule skin according to claim 4, characterized in that, The steel ring drive mechanism also includes a guide unit, which includes a guide plate fixedly connected to the fixed shaft. The two ends of the guide plate are respectively sleeved on the optical shaft and slidably connected to the optical shaft. The two optical shafts are fixedly connected to the drive mechanism through a positioning plate.

8. A test machine for detecting the adhesion performance of a capsule skin according to claim 3, characterized in that, The stretching gripper includes an inner hook mouth and an outer pressure block. The outer pressure block is driven by a first telescopic cylinder to clamp the cyst skin near the inner hook mouth. Then, a second telescopic cylinder connected to the inner hook mouth drives the stretching gripper and the clamped cyst skin to move outward to expand the opening of the cyst skin.

9. A test machine for detecting the adhesion properties of a capsule skin according to claim 8, characterized in that, The inner hook nozzle is fixedly installed at the end of the sliding plate, the first telescopic cylinder is located above the sliding plate, and the sliding plate is fixedly connected to the output end of the second telescopic cylinder so that the second telescopic cylinder can drive the overall movement of the stretching gripper.

10. A test machine for detecting the adhesion properties of a capsule skin according to claim 9, characterized in that, A slide rail is fixedly connected to the lower part of the sliding plate. The slide rail is slidably connected inside the slider. The slider is fixedly installed above the fixed seat. The second telescopic cylinder extends and retracts, causing the sliding plate to slide relative to the fixed seat.

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