Device and method for testing radial expansion of fuzz button after pressure bearing

Abstract

The invention discloses a device and method for testing radial expansion of fuzz buttons after pressure bearing, and belongs to the technical field of fuzz button pressure bearing tests.The device and method for testing radial expansion of fuzz buttons after pressure bearing comprise a detection frame and two sets of hydraulic drivers fixed to the detection frame, and the two sets of hydraulic drivers are correspondingly distributed up and down; the output end of the hydraulic driver is connected with pressure test blocks, a detection ring seat is arranged between the upper pressure test block and the lower pressure test block, the detection ring seat is movably arranged on the detection frame, and two sets of installation seats are symmetrically and slidably connected to the detection ring seat in the axis direction. A semicircular pressure sensor which wraps the fuzz button and is used for detecting the radial expansion force is mounted on the mounting seat; the mounting base is provided with an assembling structure capable of assembling semicircular pressure sensors of various sizes. The semi-annular pressure sensor matched with the fuzz button is selected according to the size of the fuzz button to be installed on the detection ring base, and the testing device is high in adaptability and convenient to apply.

Description

Technical Field

[0001] The invention relates to the technical field of pressure-bearing testing of hair buttons, and in particular to a device and method for testing radial expansion of hair buttons after being subjected to pressure. Background Art

[0002] The pressure-bearing capacity of the wool button can be evaluated when it is subjected to external pressure to ensure its safety and reliability in practical applications. Pressure equipment is used to apply pressure to both ends of the wool button in the axial direction. After being compressed, the wool button expands radially outward. The lateral force test of the outward expansion of the wool button can assist in evaluating the pressure-bearing capacity of the wool button.

[0003] For example, patent publication number CN210221467U discloses a performance testing device for wool buttons. The device comprises a support mechanism equipped with a balance and displacement measurement mechanism, a load mechanism, a load measurement mechanism, a balance mechanism, a display unit, and a power supply unit. The balance and displacement measurement mechanism is used to clamp the wool buttons and calibrate the balance of the entire device before and after the buttons are placed. The axial displacement of multiple groups of wool buttons is then measured based on the different loads provided by the load mechanism. The load mechanism is used to load and unload the wool buttons during measurement. The load measurement mechanism measures the external force applied by the load mechanism to the wool buttons. Multiple sets of wool button test data can be obtained simultaneously, resulting in an elastic performance curve for the wool buttons. By interpreting this curve, a scientific evaluation of the wool button's performance can be made.

[0004] For example, the patent publication number CN110542802B discloses an electronic component testing device, which mainly includes a lower base, an upper base and a pressure generating module. When the electronic component is to be tested, the electronic component is placed in the chip accommodating groove of the lower base. The lower base and the upper base form relative sliding with the guidance of the first sliding guide device and the second sliding guide device, so that the pressure generating module located between the lower base and the upper base is positioned at the electronic component and applies pressure to the electronic component; the volume occupied by the device can be greatly reduced, and the number of test devices or test areas can be increased, so as to maximize the test efficiency; in addition, it can also withstand the action force and reaction force, achieve internal force balance, and improve the stability and service life of the equipment.

[0005] During the pressure operation, the wool button expands in the radial direction. The sensor installed on its outside can sense and detect the change of lateral force. However, the wool buttons come in various sizes. When conducting lateral force tests of expansion, the sensor position needs to be adjusted according to the change of the wool button size. Some existing testing devices are not convenient for adjusting the detection according to the change of the wool button size, and the detection adaptability is limited. In addition, the wool button is deformed in the radial direction after being under pressure and is tightly stuck in the detection equipment. Its outside is restricted by the position of the detection sensor, which makes it inconvenient to remove the material.

[0006] In view of the above problems, it is urgent to carry out innovative design based on the original hair button radial expansion test device. Summary of the Invention

[0007] The purpose of the present invention is to provide a device and method for testing the radial expansion of a wool button after being subjected to pressure, so as to solve the problem raised in the above background technology that some existing testing devices are not convenient for adjusting the detection according to the changes in the size of the wool button, and the detection adaptability is limited. In addition, the wool button is deformed in the radial direction after being subjected to pressure and is tightly engaged in the detection equipment. Its exterior is restricted by the position of the detection sensor, making it inconvenient to remove the material.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device and method for testing the radial expansion of a wool button after being subjected to pressure, comprising a detection frame and two groups of hydraulic drivers on a fixed detection frame, the two groups of hydraulic drivers being correspondingly distributed up and down, and the output ends of the hydraulic drivers being connected to pressure test blocks, a detection ring seat being arranged between the upper and lower pressure test blocks, the detection ring seat being movably arranged on the detection frame, and two groups of mounting seats being symmetrically slidably connected to the detection ring seat along the axial direction, a semi-annular pressure sensor wrapped around the outside of the wool button to detect the radial expansion force being installed on the mounting seat; an assembly structure for assembling semi-annular pressure sensors of various sizes being arranged on the mounting seat.

[0009] Preferably, the assembly structure includes a plurality of mounting grooves provided on the mounting seat at equal intervals; a mounting column which is engaged with the mounting groove is fixedly mounted on the bottom of the semi-annular pressure sensor.

[0010] Preferably, an elastic block is fixed inside the mounting groove in the mounting seat along the axial direction; and a trapezoidal groove is formed at the bottom of the mounting column and is engaged with the elastic block.

[0011] Preferably, the detection frame is provided with a blanking mechanism for controlling the autonomous discharge of the hair buttons after pressure testing; wherein the blanking mechanism controls the lateral movement and flipping movement of the detection ring seat, and the blanking mechanism controls the separation movement of the two groups of semi-annular pressure sensors.

[0012] Preferably, the blanking mechanism includes guide rails fixedly installed on both sides of the inside of the detection frame, with slides slidably connected to the guide rails, and the two slides are fitted on both sides of the detection ring seat; a rotating rod is rotatably connected to the slide, and the rotating rod is fixedly connected to the outer side of the detection ring seat; a movable channel is opened on the detection frame, and the rotating rod passes through and is movably arranged in the movable channel.

[0013] Preferably, the detection frame is threadedly connected to a screw rod, the screw rod is threadedly sleeved with an internal thread block, and the internal thread block is fixed on a slide on one side; a support is fixedly installed on the side of the detection frame close to the pressure test block, and the support is arranged at the bottom of the detection ring seat.

[0014] Preferably, a large gear is fixedly mounted on the end of the rotating rod, and the large gear is located outside the detection frame; a support frame is fixedly mounted on the outside of the detection frame, and a lower rack meshing with the large gear is fixedly mounted on the support frame.

[0015] Preferably, the blanking mechanism also includes a slideway provided on the detection ring seat, a guide slider is slidably connected inside the slideway, and the guide slider is fixedly installed at the bottom of the mounting seat; a slide bar is fixedly installed in the detection ring seat, and the mounting seat is engaged and slidably connected to the outside of the slide bar.

[0016] Preferably, the interior of the detection ring seat is located below the mounting seat and is rotatably connected to a threaded rod, and the guide slider is threadedly sleeved on the outside of the threaded rod; the threaded rod passes through and is rotatably connected to the rotating rod and the large gear, and the end face of the threaded rod is fixedly connected to a small gear; an upper rack meshing with the small gear is fixedly installed on the support frame.

[0017] A method for testing radial expansion of a fur button after being subjected to pressure, applied to the aforementioned device for testing radial expansion of a fur button after being subjected to pressure, comprises the following steps: S1. Install the sensor According to the diameter of the hair button, a semi-annular pressure sensor of appropriate size is selected and assembled on the mounting base. The hair button is placed on the detection ring base, and the semi-annular pressure sensor is wrapped around the outside of the hair button. S2. Pressure test The hydraulic actuator is operated to control the movement of the two pressure test blocks, which apply axial pressure to the upper and lower end surfaces of the fur button, causing the fur button to be compressed by 1-30%. During the compression, the lateral force generated by the radial expansion of the fur button is detected by the semi-annular pressure sensor; S3, autonomous nesting After the pressure test, the wool button is deformed. By controlling the movement and flipping of the detection ring seat, and controlling the movement and separation of the two semi-annular pressure sensors, the deformed wool button falls off the detection ring seat and is discharged.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the device and method for testing the radial expansion of a wool button under pressure apply axial pressure to the wool button through two sets of upper and lower pressure test blocks. The wool button expands radially when under pressure, and the lateral force of the expansion is detected by a semi-annular pressure sensor wrapped around the outside of the wool button to assist in determining the pressure-bearing capacity of the wool button.

[0019] Furthermore, the mounting base is provided with an assembly structure that can assemble semi-annular pressure sensors of various sizes. According to the size of the hair button, a semi-annular pressure sensor that matches its size is selected and installed on the mounting base. The bottom of the semi-annular sensor is clamped to the outside of the elastic block inside the mounting groove by the mounting column to maintain its installation and detection stability. The semi-annular sensor is easy to disassemble and assemble, so that the test device can be adapted to detect various types of hair buttons.

[0020] Furthermore, the detection frame is provided with a blanking mechanism for controlling the autonomous discharge of the hair buttons after the pressure test. The hair buttons after the test are deformed in the radial direction, so that they are clamped in the semi-annular pressure sensor, controlling the detection ring seat to move laterally away from the pressure test block. At the same time, during the lateral movement of the detection ring seat, the meshing transmission of the large gear and the lower rack can drive the detection ring seat to rotate downward, controlling the hair buttons to be in a downward state, and assisting the subsequent autonomous blanking of the hair buttons.

[0021] During the lateral movement of the detection ring seat, the small gear moves and engages with the upper rack. Under the meshing transmission, the rotation of the screw rod can be controlled. The screw rod and the guide slider are threaded, so that the mounting seat can be controlled to move on the detection ring seat. The mounting seat drives the two sets of semi-annular pressure sensors to separate, thereby loosening the state of the hair button on the detection ring seat, so as to easily control the autonomous falling of the hair button. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the detection frame structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the pressure test block of the present invention.

[0024] Figure 3 This is a schematic structural diagram of the semi-annular pressure sensor of the present invention.

[0025] Figure 4 This is a schematic diagram of the mounting base structure of the present invention.

[0026] Figure 5 Schematic diagram of the slider structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the elastic clamping block structure of the present invention.

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the installation column of the present invention.

[0029] Figure 8 Schematic diagram of the guide rail structure of the present invention.

[0030] Figure 9 It is a schematic diagram of the slide structure of the present invention.

[0031] Figure 10It is a schematic diagram of the support structure of the present invention.

[0032] Figure 11 This is a schematic diagram of the detection ring seat structure of the present invention.

[0033] Figure 12 It is a schematic diagram of the cross-sectional structure of the rotating rod of the present invention.

[0034] Figure 13 It is a schematic diagram of the screw rod structure of the present invention.

[0035] Figure 14 This is a schematic diagram of the lower rack structure of the present invention.

[0036] Figure 15 It is a schematic diagram of the pinion structure of the present invention.

[0037] In the figure: 1. Detection frame; 2. Hydraulic drive; 3. Pressure test block; 4. Detection ring seat; 41. Guide rail; 42. Slide; 43. Screw; 44. Internal thread block; 45. Rotating rod; 46. Moving channel; 5. Mounting seat; 51. Slide; 52. Mounting groove; 53. Elastic clamp; 6. Semi-annular pressure sensor; 61. Mounting column; 62. Trapezoidal groove; 7. Large gear; 8. Support frame; 9. Lower rack; 10. Slide; 11. Guide slider; 12. Threaded rod; 13. Small gear; 14. Upper rack; 15. Support. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figures 1-6 The present invention provides the following technical solutions: a device and method for testing the radial expansion of a wool button after being subjected to pressure, comprising a detection frame 1 and two groups of hydraulic drivers 2 fixed on the detection frame 1, the two groups of hydraulic drivers 2 being correspondingly distributed up and down, and the output ends of the hydraulic drivers 2 being connected to pressure test blocks 3, a detection ring seat 4 being arranged between the upper and lower pressure test blocks 3, the detection ring seat 4 being movably arranged on the detection frame 1, and two groups of mounting seats 5 being symmetrically slidably connected to the detection ring seat 4 along the axial direction, the mounting seat 5 being installed with a semi-annular pressure sensor 6 wrapped around the outside of the wool button for detecting the radial expansion force; an assembly structure on which semi-annular pressure sensors 6 of various sizes can be assembled is provided.

[0040] See also Figure 3-Figure 7The assembly structure includes multiple mounting slots 52 spaced evenly apart on the mounting base 5. A mounting post 61 is fixedly mounted on the bottom of the semi-annular pressure sensor 6 and engages with the mounting slots 52. An elastic clamping block 53 is fixed to the mounting base 5 along the axial direction within the mounting slots 52. A trapezoidal slot 62 is defined at the bottom of the mounting post 61 and engages with the elastic clamping block 53.

[0041] Before testing, first select a semi-annular pressure sensor 6 that matches the size of the wool button, and place the matching semi-annular pressure sensor 6 on the mounting base 5. The mounting column 61 at the bottom of the semi-annular pressure sensor 6 is engaged with the mounting groove 52 at the corresponding position on the mounting base 5. Press the semi-annular pressure sensor 6 downward so that the mounting column 61 is sleeved on the elastic block 53 inside the mounting groove 52. Since a trapezoidal groove 62 is provided at the bottom of the mounting column 61, the elastic block 53 can be clamped in the trapezoidal groove 62, keeping the semi-annular pressure sensor 6 stably installed on the mounting base 5.

[0042] Then place the wool button on the detection ring seat 4, and two semi-annular pressure sensors 6 are wrapped around the outside of the wool button. The hydraulic driver 2 is operated to push the pressure test block 3 to move and press it on the surface of the wool button. The upper and lower pressure test blocks 3 apply axial pressure on the two ends of the wool button to compress the wool button by 1-30%. During the compression process, the wool button expands radially, and the lateral force generated by the radial expansion of the wool button is detected by the semi-annular pressure sensor 6 wrapped around the outside, which assists in judging the pressure-bearing capacity of the wool button.

[0043] Example 2: Please refer to Figure 1 、 Figures 8-14 On the basis of the first embodiment, a blanking mechanism is also disclosed, and its specific structure is as follows: a blanking mechanism is provided on the detection frame 1 to control the autonomous discharge of the hair buttons after the pressure test; wherein, the blanking mechanism controls the lateral movement and flipping movement of the detection ring seat 4, and the blanking mechanism controls the separation movement of the two groups of semi-annular pressure sensors 6.

[0044] See also Figures 8-12 The blanking mechanism includes guide rails 41 fixedly installed on both sides of the inside of the detection frame 1, and slides 42 are slidably connected to the guide rails 41. The two slides 42 are arranged in a close relationship on both sides of the detection ring seat 4; a rotating rod 45 is rotatably connected to the slide 42, and the rotating rod 45 is fixedly connected to the outer side of the detection ring seat 4; a moving channel 46 is opened on the detection frame 1, and the rotating rod 45 passes through and is movably arranged in the moving channel 46.

[0045] See also Figures 8-14The detection frame 1 is threaded with a screw rod 43, which is threaded with an internal thread block 44. The internal thread block 44 is fixed to a slide 42 on one side. A support 15 is fixedly installed on the side of the detection frame 1 near the pressure test block 3. The support 15 is supported on the bottom of the detection ring base 4. The end of the rotating rod 45 is fixedly mounted with a large gear 7, which is located outside the detection frame 1. A support frame 8 is fixedly mounted on the outside of the detection frame 1, and a lower rack 9 is fixedly mounted on the support frame 8 to mesh with the large gear 7.

[0046] See also Figure 11-Figure 15 The blanking mechanism also includes a slideway 10 provided on the detection ring seat 4. A guide slider 11 is slidably connected to the interior of the slideway 10, and the guide slider 11 is fixedly mounted on the bottom of the mounting seat 5. A slide bar 51 is fixedly mounted in the detection ring seat 4, and the mounting seat 5 is engaged and slidably connected to the outside of the slide bar 51. A threaded rod 12 is rotatably connected to the interior of the detection ring seat 4 below the mounting seat 5, and the guide slider 11 is threadedly sleeved on the outside of the threaded rod 12. The threaded rod 12 extends through the rotating rod 45 and the large gear 7, and a small gear 13 is fixedly connected to the end face of the threaded rod 12. An upper rack 14 is fixedly mounted on the support frame 8 and meshes with the small gear 13.

[0047] After the hair button is tested, it is deformed along the radial direction, causing it to be pressed in the semi-annular pressure sensor 6, which is inconvenient for manual material removal. At this time, the motor on the running detection frame 1 controls the screw 43 to rotate, and the screw 43 is threadedly connected to the internal thread block 44. Under the thread transmission, the slide 42 can be controlled to engage in the external lateral movement of the guide rail 41, and the slide 42 drives the detection ring seat 4 to move synchronously laterally (when the detection ring seat 4 is located in the middle area of ​​the pressure test block 3, the support 15 is supported below the detection ring seat 4 to keep the detection ring seat 4 in a horizontal state). During the movement of the detection ring seat 4, the large gear 7 is driven to move synchronously. When the detection ring seat 4 moves and separates from the support 15, the large gear 7 moves and contacts the lower rack 9. Under the meshing transmission, it can drive the large gear 7 to rotate. The large gear 7 drives the detection ring seat 4 to rotate synchronously through the rotating rod 45, so that the detection ring seat 4 flips downward so that the hair button on the surface of the detection ring seat 4 can fall off independently.

[0048] During the transverse movement of the detection ring seat 4, the large gear 7 contacts the lower rack 9, and the small gear 13 also engages with the upper rack 14 at the same time. Under the meshing transmission, the small gear 13 can be driven to rotate, and the small gear 13 drives the threaded rod 12 to rotate synchronously, so that the threaded rod 12 is connected to the inside of the detection ring seat 4 to rotate. The threaded rod 12 is threadedly connected to the guide slider 11. Under the threaded transmission, the guide slider 11 can be controlled to move along the slideway 10. The guide slider 11 is fixed to the bottom of the mounting seat 5 and can drive the mounting seat 5 to move synchronously, so that the two groups of semi-annular pressure sensors 6 on the detection ring seat 4 move and separate. At this time, the contact pressure between the hair button and the semi-annular pressure sensor 6 is reduced. When the hair button follows the detection ring seat 4 to flip downward, the hair button can fall from the detection ring seat 4 autonomously, thereby achieving the purpose of autonomous blanking.

[0049] A method for testing radial expansion of a fur button after being subjected to pressure, applied to the aforementioned device for testing radial expansion of a fur button after being subjected to pressure, comprises the following steps: S1. Install the sensor According to the diameter of the hair button, select a semi-annular pressure sensor 6 of suitable size and assemble it on the mounting base 5. Place the hair button on the detection ring base 4, and wrap the semi-annular pressure sensor 6 around the outside of the hair button. S2. Pressure test The hydraulic actuator 2 is operated to control the movement of the two pressure test blocks 3. The pressure test blocks 3 apply pressure to the upper and lower end surfaces of the fur button in the axial direction, causing the fur button to be compressed by 1-30%. During the compression, the lateral force generated by the radial expansion of the fur button is detected by the semi-annular pressure sensor 6. S3, autonomous nesting After the pressure test, the wool button is deformed. By controlling the detection ring seat 4 to move and flip, and controlling the two semi-annular pressure sensors 6 to move and separate, the deformed wool button falls off the detection ring seat 4 and is discharged.

[0050] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for testing radial expansion of a wool button after being subjected to pressure, comprising a testing frame (1) and two sets of hydraulic drivers (2) fixed on the testing frame (1), wherein the two sets of hydraulic drivers (2) are correspondingly distributed up and down, and the output end of the hydraulic driver (2) is connected to a pressure test block (3), characterized in that: A detection ring seat (4) is provided between the upper and lower pressure test blocks (3), the detection ring seat (4) is movably provided on the detection frame (1), and two sets of mounting seats (5) are symmetrically slidably connected to the detection ring seat (4) along the axial direction, and a semi-annular pressure sensor (6) wrapped around the outside of the wool button for detecting radial expansion force is installed on the mounting seat (5); An assembly structure capable of assembling semi-annular pressure sensors (6) of various sizes is provided on the mounting seat (5).

2. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 1, characterized in that: The assembly structure comprises a plurality of mounting grooves (52) provided on the mounting seat (5) at equal intervals; A mounting post (61) is fixedly mounted on the bottom of the semi-annular pressure sensor (6) and is engaged with the mounting groove (52).

3. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 2, characterized in that: An elastic clamping block (53) is fixed inside the mounting groove (52) in the mounting seat (5) along the axial direction; The bottom of the mounting column (61) is provided with a trapezoidal groove (62) that is engaged with the elastic clamping block (53).

4. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 1, characterized in that: The detection frame (1) is provided with a blanking mechanism for controlling the autonomous discharge of the wool buttons after pressure testing; The blanking mechanism controls the lateral movement and flipping movement of the detection ring seat (4), and the blanking mechanism controls the separation movement of the two groups of semi-annular pressure sensors (6).

5. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 4, characterized in that: The blanking mechanism comprises guide rails (41) fixedly mounted on both sides of the interior of the detection frame (1), a slide seat (42) being slidably connected to the guide rails (41), and the two slide seats (42) being arranged in close contact with each other on both sides of the detection ring seat (4); A rotating rod (45) is rotatably connected to the sliding seat (42), and the rotating rod (45) is fixedly connected to the outer side of the detection ring seat (4); A moving channel (46) is provided on the detection frame (1), and the rotating rod (45) passes through and is movably arranged in the moving channel (46).

6. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 4, characterized in that: The detection frame (1) is threadedly connected to a screw rod (43), and the screw rod (43) is threadedly sleeved with an internal thread block (44), and the internal thread block (44) is fixed to a slide seat (42) on one side; A support (15) is fixedly mounted on one side of the detection frame (1) close to the pressure test block (3), and the support (15) is supported and arranged on the bottom of the detection ring seat (4).

7. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 5, characterized in that: A large gear (7) is fixedly mounted on the end of the rotating rod (45), and the large gear (7) is located outside the detection frame (1); A support frame (8) is fixedly mounted on the outside of the detection frame (1), and a lower rack (9) meshingly connected with the large gear (7) is fixedly mounted on the support frame (8).

8. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 7, characterized in that: The blanking mechanism further comprises a slideway (10) provided on the detection ring seat (4), a guide slider (11) being slidably connected inside the slideway (10), and the guide slider (11) being fixedly mounted on the bottom of the mounting seat (5); A slide bar (51) is fixedly mounted in the detection ring seat (4), and the mounting seat (5) is engaged and slidably connected to the outside of the slide bar (51).

9. The device for testing radial expansion of wool buttons after being subjected to pressure according to claim 8, characterized in that: The detection ring seat (4) is located below the mounting seat (5) and is rotatably connected to a threaded rod (12), and the guide slider (11) is threadedly sleeved on the outside of the threaded rod (12); The threaded rod (12) is rotatably connected to the rotating rod (45) and the large gear (7), and the end surface of the threaded rod (12) is fixedly connected to the small gear (13); An upper rack (14) meshingly connected with the pinion (13) is fixedly mounted on the support frame (8).

10. A method for testing radial expansion of a wool button after being subjected to pressure, characterized in that: A device for testing radial expansion of a wool button under pressure as claimed in any one of claims 1 to 9 comprises the following steps: S1. Install the sensor According to the diameter of the hair button, a semi-annular pressure sensor (6) of suitable size is selected and assembled on the mounting seat (5), the hair button is placed on the detection ring seat (4), and the semi-annular pressure sensor (6) is wrapped around the outside of the hair button; S2. Pressure test The hydraulic driver (2) is operated to control the movement of the two pressure test blocks (3), and the pressure test blocks (3) apply pressure to the upper and lower end surfaces of the hair button in the axial direction, so that the hair button is compressed by 1-30%. At the same time, the lateral force generated by the radial expansion of the hair button is detected by the semi-annular pressure sensor (6); S3, autonomous nesting After the pressure test, the wool button is deformed, and by controlling the detection ring seat (4) to move and flip, and controlling the two semi-annular pressure sensors (6) to move and separate, the deformed wool button is allowed to fall off the detection ring seat (4) and be discharged.

Images