Rubber and plastic material tensile strength detection equipment

Abstract

The utility model discloses rubber and plastic material tensile strength detection equipment, which belongs to the technical field of rubber and plastic material detection, and adopts the technical scheme that the rubber and plastic material tensile strength detection equipment comprises a detection table, four-axis detection mechanisms are movably connected to the top and the bottom of the detection table, and buffer clamping mechanisms are movably connected to the outer sides of the four-axis detection mechanisms; four linkage structures can be driven by a servo motor to synchronously expand outwards, a four-axis synchronous tensile test on a rubber and plastic material is realized, the mechanical response of the material in a complex stress field is effectively simulated, on one hand, a cambered surface transmission structure of a guide disc and a sliding block is adopted, rotary motion is converted into multidirectional linear displacement, and synchronous expansion of four extension plates is ensured; on the other hand, by means of multidirectional stress loading, internal stress distribution of the material is closer to actual working conditions, authenticity and credibility of detection data are remarkably improved, the problem that a traditional detection method cannot simulate multidirectional stress is solved, and a reliable means is provided for performance evaluation of the rubber and plastic material in a complex load environment.

Description

Technical Field

[0001] This utility model relates to the field of rubber and plastic material testing technology, and in particular to a device for testing the tensile strength of rubber and plastic materials. Background Technology

[0002] Tensile strength testing of rubber and plastic materials is a core technology for evaluating their mechanical properties and is widely used in quality control and R&D in the automotive, construction, and electronics industries. Tensile strength, as a key indicator of a material's resistance to static tensile failure, directly affects product reliability and lifespan. Traditional testing is based on universal testing machines, which use clamps to fix dumbbell-shaped specimens and stretch them at a rate of 50 mm / min until fracture. Standards such as ASTM D638 and ISO 527 are used to control specimen size, loading rate, and environmental conditions. In recent years, non-contact strain measurement technology has improved the accuracy of strain field analysis, while the introduction of artificial intelligence algorithms has accelerated the prediction of failure modes of complex materials. The development of this technology provides data support for the optimization of rubber and plastic material formulations and lays the foundation for performance evaluation under extreme working conditions.

[0003] In the existing technology, there are different testing methods for various rubber products. For example, to test the tensile strength of rubber bands, it is often necessary to cut the rubber band in the middle and then perform tensile testing on the rubber band. However, the rubber product is not a whole when this testing method is used, and the error is relatively large.

[0004] To address the aforementioned issues, an existing patent (publication number: CN213181020U) proposes a tensile strength testing device for rubber and plastic materials. This device utilizes a switch, motors, and a tensile support. The switch is located in the lower left corner of the main unit's front panel, and the tensile support is located on the upper surface of the main unit. Four motors are mounted on the side of the tensile support. Because this invention includes a tensile rod and motors, the rotation of the motors drives the rotation of the tensile rod, thereby achieving the stretching of the rubber product. Furthermore, because this invention includes a protractor, accurate readings can be obtained, and specific data can be calculated. Moreover, since the tensile strength of the tested material is a complete rubber product, the experimental results have a smaller error.

[0005] To address the aforementioned issues, existing patents offer solutions. Current tensile strength testing of rubber and plastic materials typically involves uniaxial or biaxial tensile testing, which has significant limitations and cannot accurately simulate the material's performance under multiaxial stress. Furthermore, existing strength testing equipment uses clamps or fasteners to fix the workpiece, resulting in high clamping forces that can easily lead to misinterpretation of clamping force damage as tensile strength test data.

[0006] Therefore, a device for testing the tensile strength of rubber and plastic materials is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a tensile strength testing device for rubber and plastic materials, which can solve the problems of existing devices being unable to simulate complex stress conditions and the impact of clamping damage on test data.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a tensile strength testing device for rubber and plastic materials, including a testing platform, wherein a four-axis testing mechanism is movably connected to both the top and bottom of the testing platform, and a buffer clamping mechanism is movably connected to the outer side of the four-axis testing mechanism;

[0009] The four-axis detection mechanism includes a support block, an extension plate, a linkage block, and a four-axis drive assembly. The extension plate is slidably connected to the top of the detection platform, the support block is fixedly connected to the top of the extension plate, the linkage block is slidably connected to the bottom of the detection platform, the linkage block is fixedly connected to the bottom of the extension plate, and the four-axis drive assembly is movably connected to the bottom of the linkage block.

[0010] Preferably, the buffer clamping mechanism includes a clamping rod, a telescopic support, a compression spring, a buffer rod, a linkage rod, a pull block, a lifting block, and an electronic telescopic rod.

[0011] Preferably, the clamping rod is slidably connected to the outside of the support block, the telescopic support column is fixedly connected to the outside of the clamping rod, the compression spring is fixedly connected to the outside of the telescopic support column, and the buffer rod is fixedly connected to the outside of the telescopic support column.

[0012] Preferably, the linkage rod is fixedly connected to the top of the clamping rod, the pull block is rotatably connected to the outside of the linkage rod, the pull block is rotatably connected to the outside of the lifting block, the lifting block is set on the top of the support block, the electronic telescopic rod is fixedly connected to the bottom of the lifting block, and the electronic telescopic rod is fixedly connected to the top of the support block.

[0013] Preferably, the four-axis drive assembly includes a sliding block, a guide plate, an arc groove, and a servo motor.

[0014] Preferably, the sliding block is fixedly connected to the bottom of the linkage block, the sliding block is movably connected to the inner side of the arc-shaped groove, the arc-shaped groove is opened on the inner side of the guide plate, the guide plate is set at the bottom of the detection table, and the guide plate is fixedly connected to the output end of the servo motor.

[0015] Preferably, the bottom of the servo motor is fixedly connected to a support base, and the support base is fixedly connected to the bottom of the outer side of the testing table.

[0016] Preferably, the outer side of the buffer rod is provided with an anti-slip stress groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application, by setting up a four-axis detection mechanism, can drive four sets of linkage structures to expand synchronously outward through servo motors, thereby realizing four-axis synchronous tensile testing of rubber and plastic materials. This effectively simulates the mechanical response of materials under complex stress fields. On the one hand, the arc-shaped transmission structure of the guide plate and sliding block is adopted to convert the rotational motion into multi-directional linear displacement, ensuring that the four sets of extension plates expand synchronously outward. On the other hand, multi-directional stress loading makes the internal stress distribution of the material closer to the actual working conditions, significantly improving the authenticity and reliability of the test data. This solves the problem that traditional testing methods cannot simulate multi-directional stress, and provides a reliable means for performance evaluation of rubber and plastic materials under complex load environments.

[0019] 2. This application effectively solves the problem of misjudgment caused by excessive clamping force in traditional clamps by setting up a buffer clamping mechanism. On the one hand, the buffer structure combining compression springs and telescopic support columns ensures that the clamping rod contacts the workpiece first through the buffer rod during clamping, and the elastic potential energy of the compression spring absorbs the impact energy, avoiding direct damage to the workpiece from rigid clamping. On the other hand, the adaptive clamping rod system can dynamically adjust the clamping range through electronic telescopic rods, which is compatible with workpieces of different sizes and reduces manual adjustment time. Furthermore, the four-point synchronous clamping mechanism ensures uniform force on the cross-shaped workpiece, avoids local stress concentration, and controls the clamping force within a safe threshold through physical buffering and dynamic compensation, eliminating the potential material damage caused by excessive extrusion in traditional clamps and ensuring the authenticity and reliability of tensile strength test data. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the rubber and plastic material tensile strength testing equipment of this utility model;

[0021] Figure 2 This is a partial structural diagram of the testing station of this utility model;

[0022] Figure 3 This is an overall structural diagram of the four-axis detection mechanism of this utility model;

[0023] Figure 4 This is an overall structural diagram of the four-axis drive assembly of this utility model;

[0024] Figure 5 This is an overall structural diagram of the buffer clamping mechanism of this utility model.

[0025] In the diagram, 1. Inspection table; 2. Four-axis inspection mechanism; 21. Support block; 22. Extension plate; 23. Linkage block; 24. Four-axis drive assembly; 24a. Sliding block; 24b. Guide plate; 24c. Arc groove; 24d. Servo motor; 3. Buffer clamping mechanism; 31. Clamping rod; 32. Telescopic support column; 33. Compression spring; 34. Buffer rod; 35. Linkage rod; 36. Pull block; 37. Lifting block; 38. Electronic telescopic rod; 4. Support base; 5. Anti-slip stress groove. Detailed Implementation

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

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] A tensile strength testing device for rubber and plastic materials includes a testing platform 1, a four-axis testing mechanism 2 movably connected to the top and bottom of the testing platform 1, and a buffer clamping mechanism 3 movably connected to the outside of the four-axis testing mechanism 2.

[0029] The four-axis inspection mechanism 2 includes a support block 21, an extension plate 22, a linkage block 23, and a four-axis drive assembly 24. The extension plate 22 is slidably connected to the top of the inspection table 1, the support block 21 is fixedly connected to the top of the extension plate 22, the linkage block 23 is slidably connected to the bottom of the inspection table 1, the linkage block 23 is fixedly connected to the bottom of the extension plate 22, and the four-axis drive assembly 24 is movably connected to the bottom of the linkage block 23.

[0030] In this embodiment: the support block 21 located at the top of the testing table 1 and the linkage block 23 located at the bottom of the testing table 1 are connected by the extension plate 22, and the linkage block 23 and the support block 21 are respectively located at both ends of the extension plate 22. The support block 21 is located outside the center of the testing table 1, and the linkage block 23 is located close to the center of the testing table 1 to achieve the effect of extending the tensile testing distance. The four-axis drive assembly 24 can drive the linkage block 23 to move outward at the same time, thereby achieving the effect of tensile strength testing in four directions for the four support blocks 21 and the workpiece to be tested clamped on their outer sides, which can simulate complex stress conditions.

[0031] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, the buffer clamping mechanism 3 includes a clamping rod 31, a telescopic support column 32, a compression spring 33, a buffer rod 34, a linkage rod 35, a pull block 36, a lifting block 37, and an electronic telescopic rod 38.

[0032] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, the clamping rod 31 is slidably connected to the outside of the support block 21, the telescopic support column 32 is fixedly connected to the outside of the clamping rod 31, the compression spring 33 is fixedly connected to the outside of the telescopic support column 32, and the buffer rod 34 is fixedly connected to the outside of the telescopic support column 32.

[0033] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, the linkage rod 35 is fixedly connected to the top of the clamping rod 31, the pull block 36 is rotatably connected to the outside of the linkage rod 35, the pull block 36 is rotatably connected to the outside of the lifting block 37, the lifting block 37 is set on the top of the support block 21, the electronic telescopic rod 38 is fixedly connected to the bottom of the lifting block 37, and the electronic telescopic rod 38 is fixedly connected to the top of the support block 21.

[0034] In this embodiment: the material to be tested is made into a cross-shaped rectangle and placed on the testing table 1, with the four protruding parts of the cross positioned between the two sets of clamping rods 31 on the outer sides of the four support blocks 21 of the testing table 1. Positioning can be done manually or with the aid of tools. Then, the electronic telescopic rods 38 at the top of the four support blocks 21 are simultaneously activated. The electronic telescopic rods 38 extend and raise the lifting block 37. As the lifting block 37 moves upward, its two side pull blocks 36 rotate around the outer axis, pulling the linkage rod 35 and the bottom clamping rod 31. This causes the clamping rod 31 to slide inward along the outer wall of the support block 21, clamping the protruding parts of the workpiece to be tested. The clamping rod 31 has a buffer structure on its outer side consisting of a buffer rod 34, a telescopic support column 32, and a compression spring 33. When the clamping rod 31 clamps the workpiece inward, the buffer rod 34 contacts the workpiece first. As the clamping rod 31 gradually tightens, the telescopic support column 32 and the outer compression spring 33 retract, using the elastic potential energy of the compression spring 33 to buffer the movement. The telescopic support column 32 acts as a limit to prevent the clamping rod 31 from tilting when it is tightened. Finally, the four corners of the cross-shaped rectangular workpiece are clamped and fixed. This installation method is quick and can adapt to workpieces of different sizes. The buffer structure at the clamping point can prevent damage to the workpiece due to excessive clamping force and prevent misjudgment of tensile strength test data.

[0035] Specifically, such as Figure 3 , Figure 4 As shown, the four-axis drive assembly 24 includes a sliding block 24a, a guide plate 24b, an arc groove 24c, and a servo motor 24d.

[0036] Specifically, such as Figure 3 , Figure 4 As shown, the sliding block 24a is fixedly connected to the bottom of the linkage block 23, and the sliding block 24a is movably connected to the inner side of the arc groove 24c. The arc groove 24c is opened on the inner side of the guide plate 24b. The guide plate 24b is set at the bottom of the detection table 1 and is fixedly connected to the output end of the servo motor 24d.

[0037] In this embodiment: the servo motor 24d rotates to drive the guide disk 24b at the output end to rotate. The arc groove 24c on the inner side of the guide disk 24b presses the sliding block 24a that is movably connected in the arc groove 24c, causing the sliding block 24a to move along the arc groove 24c, thereby driving the top linkage block 23 to slide at the bottom of the testing table 1. The linkage block 23 is fixed to the bottom of one end of the extension plate 22, and the support block 21 is fixed to the bottom of the other end of the extension plate 22. The servo motor 24d drives the guide disk 24b, and multiple sets of sliding blocks 24a synchronously drive multiple sets of linkage blocks 23 and extension plate 22 to move outward, performing four-axis tensile strength testing on the workpiece to be tested clamped on the outside of the top support block 21 of the extension plate 22. This testing method can show the mechanical response of the workpiece under complex stress field, making the test data more accurate and reliable.

[0038] Specifically, such as Figure 1 , Figure 2 As shown, a support base 4 is fixedly connected to the bottom of the servo motor 24d, and the support base 4 is fixedly connected to the bottom of the outer side of the detection table 1.

[0039] Specifically, such as Figure 5 As shown, the outer side of the buffer rod 34 is provided with an anti-slip stress groove 5.

[0040] In this embodiment: the support base 4 can support the detection stage 1 and the servo motor 24d and its transmission, and the anti-slip stress groove 5 can increase the contact friction of the buffer rod 34 and reduce the contact stress.

[0041] Working principle: Before conducting tensile strength testing on rubber and plastic materials, the material to be tested needs to be made into a cross-shaped rectangle using a mold or other processing technology. This cross is then placed on the testing platform 1, with the four protruding parts of the cross evenly distributed between the two sets of clamping rods 31 on the outer sides of the four support blocks 21 of the testing platform 1. Positioning can be done by hand or with the aid of tools. Then, simultaneously, the electronic telescopic rods 38 at the top of the four support blocks 21 are activated. The electronic telescopic rods 38 extend, raising the lifting block 37. As the lifting block 37 moves upward, the pull blocks 36 on both sides rotate around the outer axis, pulling the rotatably connected... The linkage rod 35 and the bottom clamping rod 31 drive the clamping rod 31 to slide inward along the outer wall of the support block 21, clamping the protruding part of the workpiece to be measured. The outer side of the clamping rod 31 is provided with a buffer structure consisting of a buffer rod 34, a telescopic support column 32, and a compression spring 33. When the clamping rod 31 clamps the workpiece inward, the buffer rod 34 contacts the workpiece first. During the gradual clamping process, the telescopic support column 32 and the outer compression spring 33 use the elastic potential energy of the compression spring 33 to buffer the movement. The telescopic support column 32 plays a limiting role, preventing the extension rod from skewing when the clamping rod 31 clamps. Finally, the clamping rod gradually... The clamping process is completed in one step, fixing the four corners of the cross-shaped rectangular workpiece. This installation method is quick and can adapt to workpieces of different sizes within a certain range. At the same time, the buffer structure of the clamping points can prevent damage to the workpiece due to excessive clamping force, thus avoiding misinterpretation of tensile strength test data. After clamping, the servo motor 24d at the top of the bottom support base 4 is activated. The guide plate 24b at the output end of the servo motor 24d rotates accordingly. The arc-shaped groove 24c on the inner side of the guide plate 24b presses against the sliding block 24a that is movably connected in the groove, causing it to move along the arc-shaped groove 24c and driving the linkage block 2 at the top. 3. Slides at the bottom of the testing table 1. The linkage block 23 is fixedly connected to the bottom of one end of the extension plate 22, and the support block 21 is fixedly connected to the bottom of the other end of the extension plate 22. The guide disk 24b is driven by the servo motor 24d. Multiple sets of sliding blocks 24a drive multiple sets of linkage blocks 23 and extension plates 22 to move outward simultaneously, thereby performing four-axis tensile strength testing on the workpiece to be tested clamped on the outside of the support block 21 at the top of the extension plate 22. This testing method can present the mechanical response of the workpiece under complex stress field, making the test data more accurate and real, and with higher credibility.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tensile strength testing device for rubber and plastic materials, comprising a testing table (1), characterized in that: The top and bottom of the testing platform (1) are movably connected to a four-axis testing mechanism (2), and the outer side of the four-axis testing mechanism (2) is movably connected to a buffer clamping mechanism (3). The four-axis detection mechanism (2) includes a support block (21), an extension plate (22), a linkage block (23), and a four-axis drive assembly (24). The extension plate (22) is slidably connected to the top of the detection table (1), the support block (21) is fixedly connected to the top of the extension plate (22), the linkage block (23) is slidably connected to the bottom of the detection table (1), the linkage block (23) is fixedly connected to the bottom of the extension plate (22), and the four-axis drive assembly (24) is movably connected to the bottom of the linkage block (23).

2. The tensile strength testing equipment for rubber and plastic materials according to claim 1, characterized in that: The buffer clamping mechanism (3) includes a clamping rod (31), a telescopic support column (32), a compression spring (33), a buffer rod (34), a linkage rod (35), a pull block (36), a lifting block (37), and an electronic telescopic rod (38).

3. The tensile strength testing equipment for rubber and plastic materials according to claim 2, characterized in that: The clamping rod (31) is slidably connected to the outside of the support block (21), the telescopic support column (32) is fixedly connected to the outside of the clamping rod (31), the compression spring (33) is fixedly connected to the outside of the telescopic support column (32), and the buffer rod (34) is fixedly connected to the outside of the telescopic support column (32).

4. The tensile strength testing equipment for rubber and plastic materials according to claim 2, characterized in that: The linkage rod (35) is fixedly connected to the top of the clamping rod (31), the pull block (36) is rotatably connected to the outside of the linkage rod (35), the pull block (36) is rotatably connected to the outside of the lifting block (37), the lifting block (37) is set on the top of the support block (21), the electronic telescopic rod (38) is fixedly connected to the bottom of the lifting block (37), and the electronic telescopic rod (38) is fixedly connected to the top of the support block (21).

5. The tensile strength testing equipment for rubber and plastic materials according to claim 1, characterized in that: The four-axis drive assembly (24) includes a sliding block (24a), a guide plate (24b), an arc groove (24c), and a servo motor (24d).

6. The tensile strength testing equipment for rubber and plastic materials according to claim 5, characterized in that: The sliding block (24a) is fixedly connected to the bottom of the linkage block (23), the sliding block (24a) is movably connected to the inner side of the arc groove (24c), the arc groove (24c) is opened on the inner side of the guide plate (24b), the guide plate (24b) is set at the bottom of the detection table (1), and the guide plate (24b) is fixedly connected to the output end of the servo motor (24d).

7. The tensile strength testing equipment for rubber and plastic materials according to claim 5, characterized in that: The bottom of the servo motor (24d) is fixedly connected to a support base (4), which is fixedly connected to the bottom of the outer side of the testing table (1).

8. The tensile strength testing equipment for rubber and plastic materials according to claim 2, characterized in that: The buffer rod (34) has an anti-slip stress groove (5) on its outer side.

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