A static tensile test detection device for rubber material

Abstract

The application discloses a kind of rubber material static tensile test detection device, it is related to new material detection technical field, including detection frame and drive assembly, the top of detection frame is equipped with servo motor, and the output of servo motor is provided with screw rod, the outer surface of screw rod is equipped with slide with thread, the bottom of slide is equipped with limiting assembly for auxiliary location clamping, two groups of limiting assembly are provided with fixed plate between, and fixed plate is rotatably installed with reel inside, and the drive assembly for providing drive clamping force is set below limiting assembly.This kind of rubber material static tensile test detection device adopts reel curved surface winding clamping cooperation arc limiting plate compression double clamping structure, different from the local extrusion clamping mode of traditional rigid clamp, reel circular curved surface can be fully adhered to contact with rubber sample, can evenly disperse sample end stress when clamping, avoid sample edge extrusion damage from the root.

Description

Technical Field

[0001] This invention relates to the field of new material testing technology, specifically to a static tensile testing device for rubber materials. Background Technology

[0002] The ozone aging resistance of rubber materials is a core indicator for measuring their service life and stability. During the production and testing of rubber products, rubber samples must first undergo a long-term static tensile pretreatment before being subjected to ozone aging tests. The effectiveness of the pretreatment directly determines the accuracy of subsequent test data.

[0003] For example, the invention with application number CN219757927U discloses a static tensile testing device for rubber materials, including a base and a protective structure. This device features a protective structure mounted on top of the base, which covers the device during operation. This reduces the risk of injury to workers should the rubber material break during tensile testing, thus enhancing the safety performance of the device. However, the static tensile testing device uses rigid clamps to hold and fix the sample ends. The clamps and samples often use line contact or partial surface contact, which can easily cause edge compression damage to the rubber sample ends during clamping. Furthermore, it is prone to localized stress concentration and uneven stress distribution, leading to defects such as hidden damage and localized deformation during the tensile pretreatment stage. Summary of the Invention

[0004] The purpose of this invention is to provide a static tensile testing device for rubber materials to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a static tensile testing device for rubber materials, comprising a testing frame and a driving assembly. A servo motor is mounted on the top of the testing frame, and a lead screw is provided at the output end of the servo motor. A slide block is threaded onto the outer surface of the lead screw, and a limiting assembly for auxiliary limiting clamping is provided at the bottom of the slide block. A fixing plate is provided between the two sets of limiting assemblies, and a roller is rotatably mounted inside the fixing plate. The driving assembly for providing driving clamping force is located below the limiting assemblies, and the driving assembly includes a reversible motor, a bidirectional lead screw, a connecting plate, a rod one, and a rod two. The bidirectional lead screw is mounted on the output end of the reversible motor, and a connecting plate is threaded onto the outer surface of the bidirectional lead screw. Rod one is mounted on the top of the connecting plate, and rod two is slidably arranged inside rod one.

[0006] Furthermore, the limiting component includes a groove, a slider, and a limiting plate. The groove is provided in the middle of the slide block, and a slider is slidably installed inside the groove. A limiting plate is provided at the bottom of the slider.

[0007] Furthermore, the end of the limiting plate has an arc-shaped structure, and the fixing plate is fixedly connected to the bottom of the slide.

[0008] Furthermore, a base plate is installed at the bottom of the drive assembly, and the four corners of the base plate are fixedly connected to the bottom of the detection frame by bolts.

[0009] Furthermore, a rotating shaft is rotatably mounted on the middle of the front side of the slide, and a baffle is fixedly provided at the end of the rotating shaft.

[0010] Furthermore, a controller is installed on one side of the bottom of the detection frame, and a base is provided at the bottom of the detection frame.

[0011] Furthermore, one side of the slide block is slidably connected to the inside of the detection frame, and the inside of the detection frame has a hollow structure.

[0012] Furthermore, two sets of fixing plates and rollers are provided, with the other set of fixing plates and rollers located on the outer surface of the base plate.

[0013] Furthermore, the second rod and the first rod form a telescopic guide structure, with the top end of the second rod abutting against the bottom end of the limiting component. By telescopically adapting to the sliding stroke of the limiting plate, adaptive clamping and limiting of rubber samples of different widths can be achieved. Furthermore, the baffle is rotatably connected to the slide block via a rotating shaft. The baffle can rotate to shield the tensile working area of ​​the device, protecting the tensile-fractured rubber sample and debris, thus improving the safety of the equipment test.

[0014] This invention provides a static tensile testing device for rubber materials, which has the following advantages: 1. The present invention adopts a dual clamping structure of winding and clamping with a curved surface of the roller and pressing with an arc-shaped limiting plate. Unlike the local squeezing clamping method of traditional rigid clamps, the circular curved surface of the roller can fully fit and contact the rubber sample. During clamping, the force on the end of the sample can be evenly distributed, thus avoiding the problem of edge squeezing damage and local stress concentration of the sample from the root.

[0015] 2. This invention achieves adaptive fine-tuning clamping through a two-way lead screw, telescopic rod, and limiting component, which can accurately adapt to the clamping and fixing requirements of rubber samples of different specifications. The arc-shaped limiting plate and the roller work together to ensure that the sample is firmly clamped and does not slip during the stretching process, while preserving the integrity of the rubber material to the greatest extent, eliminating hidden damage in the pretreatment stage, and effectively ensuring uniform stretching of the rubber sample throughout the process. This provides standardized and defect-free test samples for subsequent ozone aging tests, greatly improving the accuracy and reliability of the test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a static tensile testing device for rubber materials according to the present invention; Figure 2 This is a schematic diagram of the detection frame structure of a static tensile testing device for rubber materials according to the present invention; Figure 3 This is a schematic diagram of the limiting component structure of a static tensile testing device for rubber materials according to the present invention; Figure 4 This is a schematic diagram of the drive assembly structure of a static tensile testing device for rubber materials according to the present invention; Figure 5 This is a schematic diagram of the slide and baffle unfolded structure of a static tensile testing device for rubber materials according to the present invention.

[0017] In the diagram: 1. Detection frame; 2. Controller; 3. Base; 4. Servo motor; 5. Lead screw; 6. Fixing plate; 7. Reel; 8. Slide; 9. Limiting assembly; 901. Slide groove; 902. Slider; 903. Limiting plate; 10. Drive assembly; 1001. Forward and reverse motor; 1002. Bidirectional lead screw; 1003. Connecting plate; 1004. Rod 1; 1005. Rod 2; 11. Base plate; 12. Rotating shaft; 13. Baffle. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0019] like Figures 1-5As shown, a static tensile testing device for rubber materials includes a testing frame 1, a controller 2, a base 3, a servo motor 4, a lead screw 5, a fixing plate 6, a roller 7, a slide block 8, a limiting assembly 9, a slide groove 901, a slider 902, a limiting plate 903, a drive assembly 10, a forward and reverse motor 1001, a bidirectional lead screw 1002, a connecting plate 1003, a first rod 1004, a second rod 1005, a base plate 11, a rotating shaft 12, and a baffle 13. The servo motor 4 is mounted on the top of the testing frame 1, and the output end of the servo motor 4 is equipped with a lead screw 5. The controller 2 is mounted on one side of the bottom of the testing frame 1, and the bottom of the testing frame 1... A base 3 is provided, and a slide 8 is threaded onto the outer surface of the lead screw 5. One side of the slide 8 is slidably connected to the inside of the detection frame 1. The inside of the detection frame 1 is a hollow structure. The detection frame 1 forms a vertical movement limit on the slide 8, strictly limiting horizontal displacement and ensuring that the subsequent tensile process is a purely vertical tension, thus preventing problems such as tensile ratio deviation and uneven sample stress caused by eccentric tensioning. The bottom of the slide 8 is provided with a limiting component 9 for auxiliary limiting and clamping. A fixing plate 6 is provided between the two sets of limiting components 9, and a roller 7 is rotatably installed inside the fixing plate 6 to provide drive. The clamping force driving assembly 10 is located below the limiting assembly 9, and the driving assembly 10 includes a forward and reverse motor 1001, a bidirectional lead screw 1002, a connecting plate 1003, a first rod 1004, and a second rod 1005. The output end of the forward and reverse motor 1001 is equipped with the bidirectional lead screw 1002, and the outer surface of the bidirectional lead screw 1002 is threaded with the connecting plate 1003. The first rod 1004 is installed on the top of the connecting plate 1003, and the second rod 1005 is slidably arranged inside the first rod 1004. The bottom of the driving assembly 10 is equipped with a base plate 11, and the four corners of the base plate 11 are fixed to the bottom of the detection frame 1 by bolts. Next, the limiting component 9 includes a slide groove 901, a slider 902, and a limiting plate 903. The slide base 8 has a slide groove 901 in the middle, and the slider 902 is slidably installed inside the slide groove 901. The bottom of the slider 902 is provided with a limiting plate 903. The end of the limiting plate 903 has an arc-shaped structure. The fixing plate 6 is fixedly connected to the bottom of the slide base 8. The adaptive locking clamping is achieved through the driving component 10. The forward and reverse motor 1001 receives the command from the controller 2 and starts, driving the bidirectional lead screw 1002 at the output end to rotate in the forward direction. The bidirectional thread structure of the bidirectional lead screw 1002 drives the connecting plates 1003 symmetrically distributed on both sides to slide synchronously towards each other.The first rod 1004, fixed to the top of the connecting plate 1003, moves laterally. Simultaneously, the second rod 1005 nested inside the first rod 1004 adaptively extends and retracts, precisely pushing the upper limiting component 9 to achieve fine-tuning of the clamping distance, adapting to the clamping requirements of rubber samples of different specifications. The limiting component 9 cooperates to complete precise limiting and locking. The slide groove 901 in the middle of the slide block 8 provides horizontal sliding guidance for the slider 902. Under the pushing action of the second rod 1005, the slider 902 slides smoothly along the slide groove 901, carrying... The bottom arc-shaped limiting plate 903 tightly fits and presses against both ends of the rubber sample. The servo motor 4 mounted on the top of the detection frame 1 receives commands and operates precisely, driving the lead screw 5 at its output end to rotate at a uniform speed. The lead screw 5, through threaded transmission, drives the slide 8 to move vertically and smoothly upwards along the inside of the detection frame 1. During the upward movement of the slide 8, it simultaneously lifts the upper fixing plate 6, the roller 7, and the limiting assembly 9 as a whole, while the lower clamping structure remains stationary, fixed to the base plate 11, applying a uniform and stable vertical static tensile force to the rubber sample.

[0020] like Figure 1 and Figure 5 As shown, a rotating shaft 12 is rotatably installed in the middle of the front side of the slide 8, and a baffle 13 is fixedly installed at the end of the rotating shaft 12. The baffle 13, which is rotatably installed in the front side of the slide 8 via the rotating shaft 12, can be manually rotated to the front of the working area to form a closed protective structure, effectively avoiding the risk of accidental breakage of the sample and the splashing of debris during long-term static stretching, and ensuring the long-term stable and safe operation of the equipment. There are two sets of fixed plates 6 and rollers 7. Another set of fixed plates 6 and rollers 7 are set on the outer surface of the base plate 11. The operator wraps the upper and lower ends of the rubber sample to be pretreated for ozone resistance around the surfaces of the two sets of rollers 7 respectively. The two sets of rollers 7 are rotatably assembled into the corresponding fixed plates 6. The upper fixed plate 6 is fixed to the bottom of the slide 8, and the lower fixed plate 6 is fixed to the outer surface of the base plate 11, forming a symmetrical clamping and stretching structure.

[0021] In summary, this static tensile testing device for rubber materials firstly... Figures 1-5As shown in the diagram, before the test begins, the operator winds and fixes the upper and lower ends of the rubber sample to be pretreated for ozone resistance onto the surfaces of two sets of rollers 7. The two sets of rollers 7 are rotatably assembled inside the corresponding fixing plates 6. The upper fixing plate 6 is fixed to the bottom of the slide block 8, and the lower fixing plate 6 is fixed to the outer surface of the base plate 11, forming a symmetrical clamping and stretching structure. Unlike traditional rigid clamps, the circular curved surface structure of the rollers 7 can contact and fit with the surface of the rubber sample, which can evenly distribute the force on the end of the sample during the clamping stage, avoiding edge squeezing damage. Structurally, it ensures that the sample is subjected to uniform force and eliminates the problem of local tensile damage. After the sample is wound and positioned, the drive component 10 realizes adaptive locking and clamping, and the forward and reverse motor 1001 receives instructions from the controller 2. Upon startup, the bidirectional lead screw 1002 at the output end rotates forward. The bidirectional thread structure of the bidirectional lead screw 1002 drives the symmetrically distributed connecting plates 1003 on both sides to slide synchronously towards each other. The rod 1004 fixed at the top of the connecting plate 1003 moves laterally with it. At the same time, the rod 2 1005 nested inside the rod 1004 adapts to extend and retract, precisely pushing the upper limiting component 9 to achieve fine adjustment and adaptation of the clamping distance, adapting to the clamping requirements of rubber samples of different specifications. The limiting component 9 cooperates to complete precise limiting and locking. The slide groove 901 opened in the middle of the slide block 8 provides horizontal sliding guidance for the slider 902. Under the pushing action of the rod 2 1005, the slider 902 slides smoothly along the slide groove 901, driving the bottom arc-shaped limiting plate 903 to tightly fit and press the two ends of the rubber sample. The arc-shaped limiting plate 903 and the circular structure of the scroll 7 work together to optimize the stress state of the sample, ensuring both stable clamping without slippage and maximizing the protection of the rubber material's integrity. This avoids hidden damage to the sample during the pretreatment stage and ensures accurate and reliable ozone resistance test results. Before the tensile pretreatment operation starts, the equipment automatically completes initial position reset calibration. One side of the slide block 8 is slidably connected to the inside of the hollow detection frame 1. The detection frame 1 forms a vertical movement limit on the slide block 8, strictly limiting horizontal deviation and ensuring that the subsequent tensile process is a pure vertical tension, eliminating the problems of tensile ratio deviation and uneven sample stress caused by eccentric tensile testing. At the same time, the baffle 13, which is rotatably installed on the front side of the slide block 8 via the pivot 12, can be manually rotated to the front of the working area, forming a closed protective structure. This effectively avoids the risk of accidental sample breakage and debris splashing during long-term static tensile testing, ensuring the long-term stable and safe operation of the equipment. The base plate 11 is fastened to the bottom of the test frame 1 by four corner bolts, providing rigid support for the drive assembly 10 and the lower clamping structure, avoiding equipment vibration and displacement during the 48-hour long static stretching process, and ensuring test stability. After the sample is clamped and positioned and the protective structure is in place, the operator can accurately set the pre-processing parameters such as the 20% standard stretching ratio, stretching rate and static time through the controller 2, and start the equipment operation.The servo motor 4, mounted on the top of the testing frame 1, receives commands and operates precisely, driving the lead screw 5 at its output end to rotate at a uniform speed. The lead screw 5, through threaded transmission, drives the slide 8 to move vertically and smoothly upwards along the inside of the testing frame 1. During the upward movement of the slide 8, the upper fixing plate 6, the roller 7, and the limiting component 9 are simultaneously lifted, while the lower clamping structure remains stationary, fixed to the base plate 11. This applies a uniform and stable vertical static tensile force to the rubber sample. Relying on the servo motor 4, the rotation stroke of the lead screw 5 can be precisely controlled. During the subsequent 48-hour long-term static tensile test, the limiting component 9 maintains a stable clamping state. The structural advantage of the roller 7, which bears uniform force throughout its entire range, ensures that the rubber sample remains in a uniform tensile state throughout the entire process, without local stress concentration or local deformation and damage. This provides a standard and qualified test sample for the subsequent ozone aging test. After the sample completes the 48-hour constant temperature and pressure static tensile pretreatment, the equipment automatically enters the reset process. Servo motor 4 reverses to drive lead screw 5 to rotate in the opposite direction, causing slide 8 to smoothly move down and reset to its initial position, releasing the tensile state of the sample. Simultaneously, forward and reverse motor 1001 starts in the reverse direction, driving bidirectional lead screw 1002 to rotate in the opposite direction. The two connecting plates 1003 slide in opposite directions, and rods 1004 and 1005 retract to relieve force. Limit plate 903 releases the sample, allowing the operator to remove the pretreated rubber sample and send it into the ozone resistance test chamber for aging testing. The equipment can quickly reset and operate in cycles, continuously completing multiple batches of rubber sample pretreatment work, effectively improving the overall testing efficiency.

[0022] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A static tensile testing device for rubber materials, comprising a testing frame (1) and a driving assembly (10), characterized in that, A servo motor (4) is mounted on the top of the detection frame (1), and a lead screw (5) is provided at the output end of the servo motor (4). A slide block (8) is threaded onto the outer surface of the lead screw (5). A limiting component (9) for auxiliary limiting clamping is provided at the bottom of the slide block (8). A fixing plate (6) is provided between the two sets of limiting components (9), and a scroll (7) is rotatably mounted inside the fixing plate (6). The driving component (10) for providing driving clamping force is located below the limiting component (9), and The drive assembly (10) includes a reversible motor (1001), a bidirectional lead screw (1002), a connecting plate (1003), a rod one (1004), and a rod two (1005). The output end of the reversible motor (1001) is equipped with a bidirectional lead screw (1002), and the outer surface of the bidirectional lead screw (1002) is threaded with a connecting plate (1003). The top of the connecting plate (1003) is equipped with a rod one (1004), and the rod two (1005) is slidably arranged inside the rod one (1004).

2. The static tensile testing device for rubber materials according to claim 1, characterized in that, The limiting component (9) includes a groove (901), a slider (902) and a limiting plate (903). The middle part of the slide block (8) is provided with a groove (901), and the slider (902) is slidably installed inside the groove (901). The bottom of the slider (902) is provided with a limiting plate (903).

3. The static tensile testing device for rubber materials according to claim 2, characterized in that, The end of the limiting plate (903) has an arc-shaped structure, and the fixing plate (6) is fixedly connected to the bottom of the slide (8).

4. The static tensile testing device for rubber materials according to claim 3, characterized in that, The bottom of the drive assembly (10) is fitted with a base plate (11), and the four corners of the base plate (11) are fixedly connected to the bottom of the detection frame (1) by bolts.

5. The static tensile testing device for rubber materials according to claim 4, characterized in that, The slide (8) has a rotating shaft (12) rotatably mounted on the middle of its front side, and a baffle (13) is fixedly provided at the end of the rotating shaft (12).

6. The static tensile testing device for rubber materials according to claim 5, characterized in that, A controller (2) is installed on one side of the bottom of the detection frame (1), and a base (3) is provided at the bottom of the detection frame (1).

7. The static tensile testing device for rubber materials according to claim 6, characterized in that, One side of the slide (8) is slidably connected to the inside of the detection frame (1), and the inside of the detection frame (1) is a hollow structure.

8. The static tensile testing device for rubber materials according to claim 7, characterized in that, Two sets of the fixing plate (6) and the scroll (7) are provided, and another set of the fixing plate (6) and the scroll (7) is provided on the outer surface of the base plate (11).

9. The static tensile testing device for rubber materials according to claim 8, characterized in that, The second rod (1005) and the first rod (1004) form a telescopic guide structure, with the top end of the second rod (1005) abutting against the bottom end of the limiting component (9).

10. A static tensile testing device for rubber materials according to claim 9, characterized in that, The baffle (13) is rotatably connected to the slide (8) via a rotating shaft (12), and the baffle (13) can rotate to block the stretching operation area of ​​the device.

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