Tensile property detection device for rubber product production

Abstract

The invention relates to a tensile property detection device for rubber product production in the field of test equipment, and the tensile property detection device performs multi-point clamping and tensile detection on a rubber ring through a plurality of tensile blocks which are circumferentially and equidistantly distributed, so that each part of the rubber ring is uniformly stressed during tensile detection, and the detection quality is improved; meanwhile, the detected rubber rings are released and ejected through the ejector rods which are arranged between the adjacent stretching blocks and are in linkage with the stretching blocks, traditional manual blanking operation is replaced, and the blanking efficiency is improved; in addition, a rotating disc for driving multiple groups of stretching assemblies to do circumferential intermittent rotation is matched, so that the automation level of the detection device is improved, the problem that a traditional stretching detection device is tedious in operation is solved, and batch production detection of rubber rings is adapted; in addition, crack defect detection is carried out on the rubber ring subjected to the tensile test through the ultrasonic flaw detector rotating circumferentially, the tensile test quality is further improved, and the sorting efficiency of qualified products in the production process is improved.

Description

Technical Field

[0001] The present invention relates to a tensile performance detection device, in particular to a tensile performance detection device for rubber product production applied in the field of testing equipment. Background Art

[0002] The primary purpose of tensile testing on rubber seals is to evaluate the mechanical properties and durability of the material under stress, ensuring reliable sealing in practical applications. By testing parameters such as tensile strength, elongation at break, and elastic modulus, the seal's ability to resist deformation and recover under installation compression, dynamic friction, or extreme environments (such as high temperature, high pressure, and chemical corrosion) can be verified. This helps prevent leakage risks caused by material aging, stress relaxation, or fracture, ensuring product safety and service life.

[0003] The existing patent with publication number CN112378760B discloses a rubber ring strength testing device with a bidirectional stretching mechanism, comprising a set supporting and stretching mechanism and a mobile stretching mechanism, wherein the mobile stretching mechanism is fixedly installed on the set supporting and stretching mechanism. When the tensile strength test is performed on a rubber ring with a smaller diameter, the rubber ring is set in the set groove opened by the fixed box seat, and the turntable is driven to rotate by the driving motor so that the arc-shaped support rod passes through the rod outlet to perform the stretching test on the rubber ring, which can well simulate the stretching of the rubber ring in the set state, making the tensile strength test of the rubber ring more specific; when the tensile strength test is performed on a rubber ring with a larger diameter, one end of the rubber ring is set in the set groove and the other end is set on the arc-shaped positioning plate, and the push rod welded on the side of the slot connecting block is pushed so that the set rod drives the moving block to move, thereby completing the tensile test of the rubber ring by the arc-shaped positioning plate, and facilitating the tensile strength test of rubber rings with different diameters.

[0004] The above-mentioned prior art uses an extendable arc-shaped support rod to perform tensile testing on the rubber ring, which can adapt to the testing of rubber rings of different specifications. However, the arc-shaped support rod cannot fit well with the inner wall of the rubber ring, resulting in uneven force on various parts of the rubber ring during the tensile test, which reduces the test quality and makes the loading and unloading operations cumbersome. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the tensile component of the existing tensile testing device does not have sufficient contact with the rubber ring, resulting in uneven force during the tensile test.

[0006] To solve the above problems, the present invention provides a tensile properties testing device for rubber product production, comprising a base and a mounting plate vertically fixed to the base; the mounting plate is rotatably connected to a rotating disk, the rotating disk is connected to the output shaft of a first motor, and the first motor is fixedly connected to the mounting plate via a fixing frame;

[0007] A plurality of stretching assemblies equidistantly distributed around the circumference are fixedly connected to the front end of the rotating disk, the stretching assembly including a fixed disk fixedly connected to the rotating disk, a plurality of stretching blocks equidistantly distributed around the circumference are slidably connected to the front end of the fixed disk, and a groove for clamping a rubber ring is provided on the stretching block; radial screws rotatably installed in the fixed disk are respectively threadedly connected to the inner sides of the plurality of stretching blocks, one end of the radial screw facing the center position of the fixed disk is fixedly connected to a driven gear, the driven gear is meshed with a center gear, and the center gear is fixedly connected to the output shaft of a second motor fixedly connected to the rotating disk;

[0008] An ejection assembly is provided on the inner side of the stretching block, which includes a fixed cylinder fixedly connected to the front center position of the fixed disk, an axial piston cylinder fixedly connected to the front end of the fixed cylinder, an axial piston rod slidably connected in the axial piston cylinder, a plurality of ejection rods equidistantly distributed in a circle are fixedly connected to the front end of the axial piston rod, and the ejection rods are located between adjacent stretching blocks; a plurality of radial piston cylinders are fixedly connected in the fixed cylinder, a radial piston rod extending to the outside of the fixed cylinder is slidably connected in the radial piston cylinder, a limit spring is sleeved on the radial piston rod, and the radial piston rod is opposite to the stretching block, and the fixed cylinder is filled with hydraulic oil.

[0009] In the above-mentioned tensile property testing device for rubber product production, the tensile blocks distributed in a circumference and provided with grooves are in full and uniform contact with the rubber ring to be tested, thereby improving the test quality and test efficiency.

[0010] As a further improvement of the present application, a flaw detection assembly is provided on the front side of the mounting plate and is arranged in cooperation with the stretching assembly. The rotating disk drives multiple stretching assemblies to intermittently rotate to the relative position of the flaw detection assembly. The flaw detection assembly includes an ultrasonic flaw detector and a driving mechanism for driving the ultrasonic flaw detector to perform circular motion. The ultrasonic flaw detector is arranged relative to the groove of the stretching block.

[0011] As a further improvement of the present application, the stretching block is an arc-shaped block, the groove is an arc-shaped groove with a semicircular cross-section, and the stretching block is provided with a guide surface at the front end of the groove, and the guide surface is an inclined arc-shaped surface.

[0012] As a further improvement of the present application, the fixed disk is provided with a plurality of radial grooves for radial sliding of the stretching block. The outer end of the radial screw is rotatably connected to the inner wall of the radial groove through a bearing. The end of the stretching block away from the groove slides and is nested in the radial groove and is provided with a threaded hole that cooperates with the radial screw.

[0013] As a further improvement of the present application, the driving mechanism includes a disc connected to the ultrasonic flaw detector, the disc is fixedly connected to the output shaft of the third motor, the third motor is fixedly connected to the mounting cylinder, the mounting cylinder is rotatably connected to the disc, and the mounting cylinder is fixedly connected to the mounting plate through a fixing rod.

[0014] As a further improvement of the present application, the ultrasonic flaw detector is fixedly connected to a radial slider, the radial slider is slidably connected to the disc, and the disc is rotatably connected to an adjusting screw threadedly connected to the radial slider.

[0015] As a further improvement of the present application, a sorting box located below the stretching assembly is fixedly connected to the base, and the sorting box has two independently arranged sorting cavities. The fixed disk is fixedly connected to a shielding cover arranged on the outside of the stretching block, and the ejection rod slides against the inner wall of the shielding cover. The two sorting cavities are used to store qualified rubber rings and unqualified rubber rings respectively. The first motor, the second motor and the third motor are respectively equipped with a first Hall sensor, a second Hall sensor and a third Hall sensor. The first Hall sensor is used to detect the position of each stretching assembly on the rotating disk, the second Hall sensor is used to detect the position of the stretching block, and the third Hall sensor is used to monitor the rotation position and number of rotations of the ultrasonic flaw detector. The first motor, the first Hall sensor, the second motor, the second Hall sensor, the third motor and the third Hall sensor are all electrically connected to the same controller.

[0016] As a further improvement of this application, the method includes the following steps:

[0017] Step 1: intermittent rotation, periodically starting the first motor so that the rotating disk drives the stretching assembly thereon to intermittently rotate;

[0018] Step 2: loading. When the rotating disk stops rotating, the rubber ring is placed on the stretching assembly at the loading station by manual or robotic picking, so that the rubber ring is located in the groove on the stretching block;

[0019] Step 3: Clamping: Start the second motor corresponding to the stretching assembly after loading, so that the multiple stretching blocks distributed in a circle perform synchronous centrifugal motion to the first set position, and the multiple stretching blocks expand, squeeze and clamp the rubber ring;

[0020] Step 4: stretching test, starting the second motor corresponding to the clamped stretching assembly, causing the stretching block to perform centrifugal motion to the second set position, and performing a stretching test on the clamped rubber ring;

[0021] Step 5: Release and eject. Start the second motor corresponding to the stretching assembly after the stretching test and reverse it, so that the stretching block moves centripetally to the third set position, and release and eject the rubber ring after the test.

[0022] In summary, the present invention uses multiple stretching blocks equidistantly distributed around the circumference to clamp and stretch the rubber ring at multiple points, so that the rubber ring is evenly stressed during the stretching test, and the tensile performance of each position of the rubber ring is tested, thereby improving the test quality. At the same time, the ejector rod is arranged between adjacent stretching blocks and linked with the stretching blocks to release and eject the tested rubber ring, replacing the traditional manual unloading operation and improving the unloading efficiency. In addition, the rotating disk that drives multiple groups of stretching components to rotate intermittently in a circle improves the automation level of the detection device, overcomes the problem of cumbersome operation of traditional stretching detection devices, and adapts to mass production detection of rubber rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the present application from the front side perspective;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the application from the rear side perspective;

[0025] Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of the present application;

[0026] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 5 This is a schematic diagram of the exploded assembly structure of the tensile component in this application;

[0028] Figure 6 Schematic diagram of the cross-sectional structure of the stretching block in this application;

[0029] Figure 7 Schematic diagram of the cross-sectional structure of the ejection assembly in this application;

[0030] Figure 8 This is a schematic diagram of the detection of the rubber ring during circular rotation;

[0031] Figure 9 Schematic diagram of the rubber ring release and ejection status;

[0032] Figure 10 This is a schematic diagram of the explosive assembly structure of the flaw detection component in this application.

[0033] Description of the numbers in the figure:

[0034] 1. Base; 2. Mounting plate; 3. Rotating disk; 4. Stretching assembly; 5. Sorting box; 6. Controller; 7. Flaw detection assembly; 8. First motor; 9. Fixed frame; 10. Fixed disk; 11. Stretching block; 1101. Groove; 1102. Guide surface; 12. Radial screw; 13. Passive gear; 14. Central gear; 15. Second motor; 16. Shielding cover; 17. Ejector assembly; 18. Fixed cylinder; 19. Axial piston cylinder; 20. Axial piston rod; 21. Ejector rod; 22. Radial piston cylinder; 23. Radial piston rod; 24. Limiting spring; 25. Disc; 26. Third motor; 27. Mounting cylinder; 28. Fixed rod; 29. Ultrasonic flaw detector; 30. Radial slider; 31. Adjusting screw. DETAILED DESCRIPTION

[0035] The following describes two implementation methods of the present application in detail with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1-9 A tensile properties testing device for rubber product production is shown, comprising a base 1; a mounting plate 2 is fixedly connected to the base 1, a rotating disk 3 is rotatably connected to the mounting plate 2, and the rotating disk 3 is connected to the output shaft of a first motor 8. The first motor 8 is fixedly connected to the mounting plate 2 via a fixing bracket 9.

[0038] See also Figure 4 and Figure 5 The front end of the rotating disk 3 is fixedly connected to a plurality of stretching components 4 distributed equidistantly around the circumference. The stretching component 4 includes a fixed disk 10 fixedly connected to the rotating disk 3. The front end of the fixed disk 10 is slidably connected to a plurality of stretching blocks 11 distributed equidistantly around the circumference. A groove 1101 for clamping the rubber ring is provided on the stretching block 11; the inner sides of the plurality of stretching blocks 11 are respectively threadedly connected to radial screw rods 12 rotatably installed in the fixed disk 10, and the radial screw rods 12 are fixedly connected to a driven gear 13 at one end facing the center position of the fixed disk 10. The driven gear 13 is meshed with a center gear 14, and the center gear 14 is fixedly connected to the output shaft of a second motor 15 fixedly connected to the rotating disk 3; the second motor 15 drives the plurality of radial screw rods 12 to rotate through the center gear 14 and the driven gear 13, and the radial screw rods 12 drive the plurality of circumferentially distributed stretching blocks 11 to perform centripetal motion or centrifugal motion on the fixed disk 10;

[0039] See also Figure 5 and Figure 7, an ejection assembly 17 is provided on the inner side of the stretching block 11, and the ejection assembly 17 includes a fixed cylinder 18 fixedly connected to the front center position of the fixed disk 10, and the front end of the fixed cylinder 18 is fixedly connected to an axial piston cylinder 19, and an axial piston rod 20 is slidably connected in the axial piston cylinder 19. The front end of the axial piston rod 20 is fixedly connected to a plurality of ejection rods 21 distributed equidistantly around the circumference. The ejection rods 21 are located between adjacent stretching blocks 11. When the stretching block 11 moves centripetally or centrifugally, it will not collide or interfere with the ejection rods 21; a plurality of radial pistons are fixedly connected in the fixed cylinder 18. Cylinder 22, the radial piston cylinder 22 is slidably connected with a radial piston rod 23 extending to the outside of the fixed cylinder 18, the radial piston rod 23 is sleeved with a limit spring 24 that abuts against the outer wall of the fixed cylinder 18, the radial piston rod 23 is arranged opposite to the stretching block 11, and the fixed cylinder 18 is filled with hydraulic oil. When the stretching block 11 moves centripetally, the radial piston rod 23 is squeezed, and the hydraulic oil in the fixed cylinder 18 is squeezed into the axial piston cylinder 19, thereby pushing the axial piston rod 20 and the ejector rod 21 to move axially, and ejecting the rubber ring clamped on the stretching block 11.

[0040] When using a tensile properties testing device for rubber product production, please refer to Figure 8 and Figure 9 , comprising the following steps:

[0041] Step 1: intermittent rotation, periodically start the first motor 8, so that the rotating disk 3 drives the stretching assembly 4 thereon to intermittently rotate;

[0042] Step 2: loading. When the rotating disk 3 stops rotating, the rubber ring is placed on the stretching assembly 4 located at the loading station by manual or robotic picking, so that the rubber ring is located in the groove 1101 on the stretching block 11;

[0043] Step 3: Clamping: Start the second motor 15 corresponding to the stretched assembly 4 after loading, so that the multiple stretched blocks 11 distributed in a circle perform synchronous centrifugal motion to the first set position, and the multiple stretched blocks 11 expand, squeeze and clamp the rubber ring;

[0044] Step 4: stretching test, starting the second motor 15 corresponding to the clamped stretching assembly 4, so that the stretching block 11 performs centrifugal movement to the second set position, and performs a stretching test on the clamped rubber ring;

[0045] Step five, release and eject, start the second motor 15 corresponding to the stretching component 4 after the stretching detection and reverse it, so that the stretching block 11 moves centripetally to the third set position. During this process, the stretching block 11 releases the rubber ring. At the same time, the stretching block 11 squeezes and triggers the ejection component 17, and the ejection rod 21 of the ejection component 17 pushes the rubber ring out of the stretching block 11.

[0046] It should be noted that the above-mentioned "first set position", "second set position" and "third set position" are all manually set values, which are set specifically according to the diameter of the rubber ring to be tested so that the rubber ring can be clamped, stretched and released to be ejected.

[0047] Compared with the traditional rubber tensile testing device, the present invention uses multiple tensile blocks 11 distributed equidistantly around the circumference to clamp and stretch the rubber ring at multiple points, so that the rubber ring is evenly stressed during the tensile test, and the tensile performance of each position of the rubber ring is tested, thereby improving the test quality. At the same time, the ejector rod 21 is arranged between adjacent tensile blocks 11 and linked to the tensile blocks 11 to release and eject the tested rubber ring, replacing the traditional manual unloading operation and improving the unloading efficiency. In addition, the rotating disk 3 that cooperates with the multiple groups of tensile components 4 to make intermittent circular rotation improves the automation level of the detection device, overcomes the problem of cumbersome operation of the traditional tensile testing device, and adapts to the batch production detection of rubber rings.

[0048] See also Figure 5 and Figure 6 The stretching block 11 is an arc-shaped block, the groove 1101 is an arc-shaped groove with a semicircular cross-section, and the stretching block 11 is provided with a guide surface 1102 at the front end of the groove 1101, and the guide surface 1102 is an inclined arc-shaped surface.

[0049] Specifically, by providing a groove 1101 with a semicircular cross-section, the rubber ring has a better limiting effect, reducing the probability of the rubber ring falling out during stretching, improving the stability during clamping and stretching, and by providing a guide surface 1102, the rubber ring is smoother during loading and unloading. It should be noted that the more stretching blocks 11 there are, the better the fit between the rubber ring and the multiple stretching blocks 11, the more uniform the force on the rubber ring during stretching, and the better the detection quality.

[0050] See also Figure 5 The fixed disk 10 is provided with a plurality of radial grooves for the stretching block 11 to slide radially. The outer end of the radial screw rod 12 is rotatably connected to the inner wall of the radial groove through a bearing. The end of the stretching block 11 away from the groove 1101 is slidably nested in the radial groove and is provided with a threaded hole that cooperates with the radial screw rod 12.

[0051] Specifically, when the stretching block 11 performs centripetal and centrifugal motions on the fixed disk 10 , the stretching block 11 moves along the radial slot, so that the stretching test has better stability.

[0052] See also Figure 7 The radial piston cylinder 22 is a cylindrical structure with two ends open. The outer end of the radial piston cylinder 22 is fixedly connected to the inner wall of the fixed cylinder 18, and the inner end of the radial piston cylinder 22 is connected to the inner cavity of the fixed cylinder 18.

[0053] Specifically, when the radial piston rod 23 is squeezed, the radial piston rod 23 pushes the hydraulic oil in the fixed cylinder 18 into the axial piston cylinder 19 .

[0054] Second implementation method:

[0055] Figure 1 、 Figure 3 、 Figure 4 and Figure 10 The present invention shows a tensile properties testing device for rubber product production. Based on the first embodiment, a flaw detection component 7 is provided on the front side of the mounting plate 2, which is arranged in cooperation with the tensile component 4. The rotating disk 3 drives multiple tensile components 4 to intermittently rotate to the relative position of the flaw detection component 7. The flaw detection component 7 includes an ultrasonic flaw detector 29 and a driving mechanism for driving the ultrasonic flaw detector 29 to perform circular motion. The ultrasonic flaw detector 29 is arranged relative to the groove 1101 of the tensile block 11.

[0056] Specifically, the ultrasonic flaw detector 29 that performs circular motion performs circumferential detection on the rubber ring, thereby promptly detecting cracks in the rubber ring and further promptly detecting damaged rubber rings, thereby replacing manual observation.

[0057] See also Figure 10 The driving mechanism includes a disc 25 connected to the ultrasonic flaw detector 29, the disc 25 is fixedly connected to the output shaft of the third motor 26, the third motor 26 is fixedly connected to the mounting cylinder 27, the mounting cylinder 27 is rotatably connected to the disc 25, and the mounting cylinder 27 is fixedly connected to the mounting plate 2 through a fixing rod 28.

[0058] Specifically, the third motor 26 drives the disc 25 to rotate, and the disc 25 drives the ultrasonic flaw detector 29 thereon to make a circular motion, and the ultrasonic flaw detector 29 performs a circumferential detection on the rubber ring.

[0059] See also Figure 10 The ultrasonic flaw detector 29 is fixedly connected to a radial slider 30 , the radial slider 30 is slidably connected to the disc 25 , and the disc 25 is rotatably connected to an adjusting screw 31 threadedly connected to the radial slider 30 .

[0060] Specifically, by rotating the adjusting screw 31, the radial slider 30 drives the ultrasonic flaw detector 29 to move on the disc 25, thereby changing the radius of the circular trajectory of the ultrasonic flaw detector 29 when it makes a circular motion, adapting to the flaw detection of rubber rings with different diameters and having good adaptability.

[0061] See also Figure 1 and Figure 10A sorting box 5 located below the stretching assembly 4 is fixedly connected to the base 1, and the sorting box 5 has two independently arranged sorting chambers. The fixed disk 10 is fixedly connected to a shielding cover 16 sleeved on the outside of the stretching block 11, and the ejection rod 21 slides against the inner wall of the shielding cover 16. The two sorting chambers are used to store qualified rubber rings and unqualified rubber rings respectively. The first motor 8, the second motor 15 and the third motor 26 are respectively equipped with a first Hall sensor, a second Hall sensor and a third Hall sensor. The first Hall sensor is used to detect the position of each stretching assembly 4 on the rotating disk 3, the second Hall sensor is used to detect the position of the stretching block 11, and the third Hall sensor is used to monitor the rotation position and number of rotations of the ultrasonic flaw detector 29. The first motor 8, the first Hall sensor, the second motor 15, the second Hall sensor, the third motor 26 and the third Hall sensor are all electrically connected to the same controller 6.

[0062] Specifically, after the rubber ring has completed the stretching test, the stretching assembly 4 drives the rubber ring that has completed the stretching test to move to the relative position of the flaw detection assembly 7, and then the third motor 26 and the ultrasonic flaw detector 29 are started to perform flaw detection on the rubber ring. After the flaw detection is completed, the first motor 8 is started, and the rotating disk 3 drives the corresponding rubber ring to move to the top of the sorting cavity corresponding to the sorting box 5, and then the second motor 15 is started to release and eject the rubber ring, so that the rubber ring falls into the corresponding sorting cavity;

[0063] It should be noted that when the rubber ring breaks during the tensile test, the ultrasonic flaw detector 29 cannot obtain a complete circumferential flaw detection signal during detection, and the rubber ring can be judged as an unqualified rubber ring. When the rubber ring breaks, it is blocked by the shielding cover 16 and retained in the shielding cover 16. When unloading, the broken rubber ring in the shielding cover 16 is ejected by the ejection rod 21, and thus sorted into the unqualified sorting chamber.

[0064] Compared with the existing rubber product tensile testing device, the present invention performs circumferential flaw detection on the stretched rubber ring by providing a circumferentially rotating ultrasonic flaw detector 29, so as to timely detect tensile test damage, replace manual visual observation, reduce the probability of rubber rings with cracks in the tensile test being misjudged as qualified, and further improve the detection quality; at the same time, in conjunction with the controller 6, the shielding cover 16, the ejection rod 21 and the sorting box 5, automatic sorting of rubber rings is realized, especially the detection and sorting of rubber rings that are cracked and broken during the tensile test, thereby further improving production detection efficiency.

[0065] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A tensile properties testing device for rubber product production, characterized in that: It comprises a base (1) and a mounting plate (2) vertically fixed on the base (1); the mounting plate (2) is rotatably connected to a rotating disk (3), the rotating disk (3) is connected to the output shaft of a first motor (8), and the first motor (8) is fixedly connected to the mounting plate (2) via a fixing frame (9); The front end of the rotating disk (3) is fixedly connected to a plurality of stretching assemblies (4) distributed at equal intervals around the circumference. The stretching assemblies (4) include a fixed disk (10) fixedly connected to the rotating disk (3). The front end of the fixed disk (10) is slidably connected to a plurality of stretching blocks (11) distributed at equal intervals around the circumference. The stretching blocks (11) are provided with grooves (1101) for clamping the rubber rings. The inner sides of the plurality of stretching blocks (11) are respectively threadedly connected to radial screw rods (12) rotatably mounted in the fixed disk (10). One end of the radial screw rod (12) facing the center position of the fixed disk (10) is fixedly connected to a driven gear (13). The driven gear (13) is meshed with a central gear (14). The central gear (14) is fixedly connected to the output shaft of a second motor (15) fixedly connected to the rotating disk (3). An ejection assembly (17) is provided on the inner side of the stretching block (11). The ejection assembly (17) includes a fixed cylinder (18) fixedly connected to the front center position of the fixed disk (10). The front end of the fixed cylinder (18) is fixedly connected to an axial piston cylinder (19). An axial piston rod (20) is slidably connected in the axial piston cylinder (19). The front end of the axial piston rod (20) is fixedly connected to a plurality of ejection rods (21) distributed equidistantly around the circumference. The ejection rods (21) are located between adjacent stretching blocks (11); a plurality of radial piston cylinders (22) are fixedly connected in the fixed cylinder (18). A radial piston rod (23) extending to the outside of the fixed cylinder (18) is slidably connected in the radial piston cylinder (22). A limit spring (24) is sleeved on the radial piston rod (23) and abuts against the outer wall of the fixed cylinder (18). The radial piston rod (23) is arranged opposite to the stretching block (11). The fixed cylinder (18) is filled with hydraulic oil.

2. A tensile properties testing device for rubber product production according to claim 1, characterized in that: A flaw detection assembly (7) is provided on the front side of the mounting plate (2) and is arranged in cooperation with the stretching assembly (4). The rotating disk (3) drives the plurality of stretching assemblies (4) to intermittently rotate to a relative position of the flaw detection assembly (7). The flaw detection assembly (7) includes an ultrasonic flaw detector (29) and a driving mechanism for driving the ultrasonic flaw detector (29) to perform circular motion. The ultrasonic flaw detector (29) is arranged relative to the groove (1101) of the stretching block (11).

3. The tensile properties testing device for rubber product production according to claim 1, characterized in that: The stretching block (11) is an arc-shaped block, the groove (1101) is an arc-shaped groove with a semicircular cross-section, and the stretching block (11) is provided with a guide surface (1102) at the front end of the groove (1101), and the guide surface (1102) is an inclined arc-shaped surface.

4. The tensile properties testing device for rubber product production according to claim 1, characterized in that: The fixed disk (10) is provided with a plurality of radial grooves for the stretching block (11) to slide radially, the outer end of the radial screw rod (12) is rotatably connected to the inner wall of the radial groove through a bearing, and the end of the stretching block (11) away from the groove (1101) is slidably nested in the radial groove and is provided with a threaded hole that cooperates with the radial screw rod (12).

5. The tensile properties testing device for rubber product production according to claim 2, characterized in that: The driving mechanism comprises a disc (25) connected to an ultrasonic flaw detector (29), the disc (25) being fixedly connected to an output shaft of a third motor (26), the third motor (26) being fixedly connected to a mounting cylinder (27), the mounting cylinder (27) being rotationally connected to the disc (25), and the mounting cylinder (27) being fixedly connected to a mounting plate (2) via a fixing rod (28).

6. A tensile properties testing device for rubber product production according to claim 5, characterized in that: The ultrasonic flaw detector (29) is fixedly connected to a radial slider (30), the radial slider (30) is slidably connected to the disc (25), and the disc (25) is rotatably connected to an adjusting screw (31) threadedly connected to the radial slider (30).

7. The tensile properties testing device for rubber product production according to claim 6, characterized in that: The base (1) is fixedly connected to a sorting box (5) located below the stretching assembly (4). The sorting box (5) has two independently arranged sorting chambers. The fixed disk (10) is fixedly connected to a shielding cover (16) sleeved on the outside of the stretching block (11). The ejection rod (21) slides against the inner wall of the shielding cover (16). The two sorting chambers are respectively used to store qualified rubber rings and unqualified rubber rings. The first motor (8), the second motor (15) and the third motor (26) are respectively equipped with a first Hall sensor, a second Hall sensor and a third Hall sensor. The first Hall sensor is used to detect the position of each stretching assembly (4) on the rotating disk (3), the second Hall sensor is used to detect the position of the stretching block (11), and the third Hall sensor is used to monitor the rotation position and number of rotations of the ultrasonic flaw detector (29). The first motor (8), the first Hall sensor, the second motor (15), the second Hall sensor, the third motor (26) and the third Hall sensor are all electrically connected to the same controller (6).

8. The tensile properties testing device for rubber product production according to claim 1, characterized in that: The use includes the following steps: Step 1: intermittent rotation, periodically starting the first motor (8), so that the rotating disk (3) drives the stretching assembly (4) thereon to intermittently rotate; Step 2: loading, when the rotating disk (3) stops rotating, the rubber ring is placed on the stretching assembly (4) located at the loading station by manual or mechanical picking up, so that the rubber ring is located in the groove (1101) on the stretching block (11); Step 3: Clamping: Start the second motor (15) corresponding to the stretched component (4) after loading, so that the multiple stretched blocks (11) distributed in a circumference perform synchronous centrifugal motion to the first set position, and the multiple stretched blocks (11) expand, squeeze and clamp the rubber ring; Step 4: stretching test, starting the second motor (15) corresponding to the clamped stretching assembly (4), so that the stretching block (11) performs centrifugal movement to the second set position, and performs stretching test on the clamped rubber ring; Step five, releasing and ejecting, starting the second motor (15) corresponding to the stretching assembly (4) after the stretching test and reversing it, so that the stretching block (11) moves centripetally to the third set position, and releasing and ejecting the rubber ring after the test.

Images