High polymer material anti-fatigue testing device

Abstract

The utility model discloses an anti-fatigue testing device for a high polymer material. The anti-fatigue testing device comprises a base; the fixed end of the linear driver is arranged on the base, and the movable end of the linear driver moves in the vertical direction; the lifting plate is arranged at the moving end of the linear driver; and each material clamping part comprises two material clamping devices, one material clamping device is arranged on the base, the other material clamping device is arranged on the lifting plate, and the two material clamping devices are used for clamping the two ends of the high polymer material respectively. The device can be used for carrying out anti-fatigue test on a plurality of high polymer materials at the same time, improves the test efficiency, and is mainly used for evaluating the mechanical property change of the high polymer materials under alternating load.

Description

Polymer material fatigue testing device Technical Field

[0001] This utility model relates to the field of mechanical property testing technology. More specifically, this utility model relates to a fatigue resistance testing device for polymer materials. Background Technology

[0002] Polymer materials (such as fibers and plastics) are widely used in modern industry. Their fatigue resistance is an important indicator for measuring material quality and service life. Especially for polymer materials in alternating load application scenarios, fatigue testing can assess the changes in their mechanical properties by applying force to the material and stretching it repeatedly, thereby predicting the material's performance in actual applications in advance.

[0003] Patent CN215179325U discloses a reciprocating tensile fatigue testing device, including a body with two fixing clamps. The ends of the polymer material (fiber thread) to be tested are fixedly connected to the two clamps respectively. By sliding one of the clamps, the fiber thread is reciprocally stretched, thus performing fatigue testing. When the fiber thread is fixed to the clamp, it is held between a clamping plate and a fixing block, facilitating fatigue testing. However, this type of device can only test a single fiber thread at a time, resulting in low testing efficiency.

[0004] Therefore, it is worth considering how to design the structure of a fatigue testing device for polymer materials to address the aforementioned technical deficiencies. Summary of the Invention

[0005] One objective of this invention is to provide a fatigue testing device for polymer materials, comprising:

[0006] Base;

[0007] A linear actuator, the fixed end of which is disposed on the base, and the moving end of the linear actuator moves in the vertical direction;

[0008] A lifting plate is provided on the moving end of the linear actuator;

[0009] Multiple clamping sections, each including two clamps, one clamp on the base and the other on the lifting plate, the two clamps being used to clamp the two ends of the polymer material respectively.

[0010] Preferably, a pair of support columns are also erected on the base, with the pair of support columns respectively located on both sides of the lifting plate. A first slide rail is vertically provided on the inner side of the support column, and a first slider is slidably provided on the first slide rail. The pair of first sliders are respectively fixedly connected to both sides of the lifting plate.

[0011] Preferably, the clamp includes:

[0012] A pair of clamping plates are arranged to slide relative to each other, and an arc-shaped clamping opening is recessed on one side of the pair of clamping plates;

[0013] A fixing screw is movably mounted on a pair of clamping plates, and both ends of the fixing screw are limited and fixed by nuts.

[0014] Preferably, an anti-slip layer is applied to the opposite side of the pair of clamping plates.

[0015] Preferably, both the base and the lifting plate are provided with a plurality of second slide rails horizontally, and a plurality of second sliders are slidably provided on the second slide rails. The plurality of second sliders are fixedly connected to the clamping plates of the plurality of clamps in a one-to-one correspondence.

[0016] Preferably, the second slide rail is provided with a plurality of first positioning holes along its length;

[0017] The second slider is provided with a second positioning hole corresponding to the first positioning hole. Positioning pins are detachably inserted into the corresponding second positioning hole and the first positioning hole. The two ends of the positioning pins are limited and fixed by nuts.

[0018] Preferably, the surface of the clamping plate is recessed with a winding channel communicating with the clamping opening, the winding channel being used to wind and accommodate soft polymer materials.

[0019] Preferably, an elastic buffer layer is provided on the inner wall of the winding channel.

[0020] Preferably, the lifting plate is equipped with a counter.

[0021] This utility model has at least the following beneficial effects:

[0022] First, this utility model is equipped with multiple clamping parts, which can simultaneously perform fatigue tests on multiple polymer materials, greatly improving testing efficiency, saving time and labor costs, meeting the needs of large-scale material testing, and helping to accelerate the progress of material research and development and quality inspection.

[0023] Secondly, this utility model provides a better clamping method for soft polymer materials by setting up a winding channel. By winding and accommodating the material in the winding channel, the clamping effect on soft materials is improved, which solves the problem of poor fixation of soft materials by ordinary clamping methods and can prevent the material from slipping out of the clamping plate during the test.

[0024] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0025] Figure 1 is a side view of the testing device according to one of the technical solutions of this utility model;

[0026] Figure 2 is an enlarged view of structure A in Figure 1;

[0027] Figure 3 is a top view of the clamping device according to one of the technical solutions of this utility model;

[0028] Figure 4 is a side view of the clamping plate according to one of the technical solutions of this utility model;

[0029] Figure 5 is a top view of the testing device according to one of the technical solutions of this utility model;

[0030] Figure 6 is a top view of the base according to one of the technical solutions of this utility model.

[0031] The labels in each of the attached figures are as follows:

[0032] 1. Base; 2. Linear actuator; 3. Lifting plate; 4. Support column; 5. Clamping plate; 6. Fixing screw; 7. Clamping port; 8. Second slider; 9. Rolling channel; 10. Second slide rail. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0034] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] As shown in Figures 1-6, this utility model provides a fatigue testing device for polymer materials, comprising:

[0036] Base 1; Specifically, the base 1 may be made of aluminum alloy or steel, and the base 1 may be provided with mounting holes for fixing the linear actuator 2 to stabilize the load-bearing component's force;

[0037] A linear actuator 2, with its fixed end mounted on the base 1, has a moving end that moves vertically. Specifically, the linear actuator 2 can be an electric push rod, a linear cylinder, a linear hydraulic cylinder, etc. The fixed end of the linear actuator 2 can be bolted to the base 1, and the moving end of the linear actuator 2 can be welded or bolted to the lifting plate 3 described below. The linear actuator 2 is used to provide power for the vertical movement of the lifting plate 3.

[0038] The lifting plate 3 is disposed on the moving end of the linear actuator 2. Specifically, the lifting plate 3 is made of stainless steel or high-strength aluminum alloy in the shape of a rectangular plate. The lifting plate 3 can be connected to the moving end of the linear actuator 2 by welding or bolting. The bottom of the lifting plate 3 can be provided with an installation structure for installing the clamp described below.

[0039] Multiple clamping sections are provided, each including two clamps. One clamp is located on the base 1, and the other clamp is located on the lifting plate 3. The two clamps are used to clamp the two ends of the polymer material. Specifically, the clamping section consists of two clamps. For sheet or strip materials, a clamp-type clamp can be used. The clamping surface of the clamp can be treated with anti-slip treatment. The clamps are installed in mounting slots or holes at corresponding positions on the base 1 and the lifting plate 3. After fixing the two ends of the polymer material to the clamps on the base 1 and the lifting plate 3 respectively, the linear actuator 2 is started to perform a fatigue test.

[0040] In the above technical solution, the clamps (vertically symmetrical) located on the base 1 and the lifting plate 3 in each clamping part are opened. Then, the two ends of multiple polymer materials are sequentially placed into the corresponding clamps. The clamps are closed to firmly clamp the two ends of the materials. The power supply of the linear actuator 2 is turned on. The operating parameters, such as movement speed, stroke and number of cycles, are set according to the test requirements. The linear actuator 2 is started, and its moving end will reciprocate in the vertical direction, driving the lifting plate 3 to move up and down. Due to the presence of multiple clamping parts, multiple polymer materials will be subjected to periodic stretching and compression simultaneously under the action of the clamps at both ends, simulating the stress situation in actual use, thereby conducting fatigue tests simultaneously and helping to improve test efficiency.

[0041] In another technical solution, a pair of support columns 4 are also erected on the base 1, with the pair of support columns 4 respectively located on both sides of the lifting plate 3. A first slide rail is vertically provided on the inner side of the support column 4, and a first slider is slidably mounted on the first slide rail. The pair of first sliders are fixedly connected to both sides of the lifting plate 3. Specifically, the pair of support columns 4 on the base 1 are located on both sides of the lifting plate 3. The first slide rail on the inner side of the support column 4 provides a sliding path for the first slider. The pair of first sliders are fixed to both sides of the lifting plate 3. With this design, the lifting plate 3 can slide smoothly up and down along the first slide rail during the test, ensuring the stability of the device operation and the accuracy of the test results.

[0042] In another technical solution, the clamp includes:

[0043] A pair of clamping plates 5 are slidably arranged relative to each other, and an arc-shaped clamping opening 7 is recessed on one side of the pair of clamping plates 5. Specifically, the pair of clamping plates 5 can be made of high-strength stainless steel. The pair of clamping plates can be slidably arranged relative to each other through the cooperation of slide rail and slide groove. The setting of the clamping opening 7 helps the pair of clamping plates 5 to form a complete circular channel when closed, which is used to clamp cylindrical or sheet-shaped polymer materials and avoid damage to the edges of polymer materials due to stress concentration.

[0044] A fixing screw 6 is movably mounted on a pair of clamping plates 5. The two ends of the fixing screw 6 are fixed by nuts. Specifically, the fixing screw 6 passes through a pre-set through hole on the pair of clamping plates 5. The clamping plates 5 are slid to adjust the clamping distance. After placing the polymer material, the nuts are tightened to ensure that the clamping force is evenly distributed.

[0045] In the above technical solution, the polymer material is placed between the clamping openings 7 of a pair of clamping plates 5. The distance between the pair of clamping plates 5 is initially adjusted by the slide rail structure. Then, the fixing screw 6 is inserted into the pair of clamping plates 5, and the fixing screw 6 is pre-tightened by rotating the nut, so that the clamping openings 7 slightly clamp the material. The nut is further tightened to the set torque to ensure that the material is stable and does not slip. Then, the testing device is started, and the material clamped on the clamping device is reciprocated and stretched by the drive mechanism to complete the fatigue test. The clamping device can achieve quick clamping and reliable fixation, and is suitable for materials of different shapes and sizes, meeting the high precision requirements of polymer material fatigue testing.

[0046] In another technical solution, an anti-slip layer is applied to one side of a pair of clamping plates 5. Specifically, a polymer material is placed between the pair of clamping plates 5. Because the anti-slip layer (made of rubber, sponge, or other materials) is applied to the opposite side of the clamping plates 5, the anti-slip layer increases the friction between the clamping plates 5 and the material when the device applies tensile force to the material for fatigue testing. This prevents the material from sliding or falling out of the clamping plates 5, ensuring that the material is fixed and stable during the test, allowing the test to proceed smoothly, and effectively improving the accuracy and reliability of the test results.

[0047] In another technical solution, multiple second slide rails 10 are horizontally provided on both the base 1 and the lifting plate 3. Multiple second sliders 8 are slidably provided on the second slide rails 10, and the multiple second sliders 8 are fixedly connected to the clamping plates 5 of multiple clamps in a one-to-one correspondence. Specifically, the arrangement of the second slide rails 10 and the multiple second sliders 8 helps to flexibly move the second sliders 8 according to the size and specifications of the material, thereby driving the clamping plates 5 to adjust their position and fix them. This design can adapt to polymer materials of different sizes and shapes, realize the simultaneous testing of multiple materials, and effectively improve the testing efficiency and the versatility of the device.

[0048] In another technical solution, the second slide rail 10 is provided with a plurality of first positioning holes along its length direction;

[0049] The second slider 8 is provided with a second positioning hole corresponding to the first positioning hole. Positioning pins are detachably inserted into the corresponding second positioning hole and the first positioning hole. The two ends of the positioning pin are fixed by nuts. Specifically, when it is necessary to adjust the position of the second slider 8 on the second slide rail 10, that is, the position and size of the clamp, first remove the nuts at both ends of the positioning pin, pull out the positioning pin, move the second slider 8 to a suitable position so that the second positioning hole is aligned with the corresponding first positioning hole, insert the positioning pin, and then fix it at both ends with nuts. By moving the second slider 8, the clamp can adapt to the testing of materials of different sizes, enhance the versatility and practicality of the device, and ensure that the test is carried out smoothly.

[0050] In another technical solution, the surface of the clamping plate 5 is recessed with a winding channel 9 that communicates with the clamping opening 7. The winding channel 9 is used to wind and accommodate soft polymer materials. Specifically, one end of a soft polymer material such as sponge or fiber is inserted into the clamping opening 7 and wound along the winding channel 9. The winding channel 9 is a structure recessed on the surface of the clamping plate 5 and communicates with the clamping opening 7. During testing, the material is fixed by the clamping openings 7 of a pair of clamping plates 5, and then the excess polymer material is wound and accommodated in the winding channel 9 to prevent the excess polymer material from affecting the fatigue test, and there is no need to cut or damage the polymer material.

[0051] In another technical solution, an elastic buffer layer is provided on the inner wall of the winding channel 9; specifically, the elastic buffer layer can reduce the rigid collision and friction between the polymer material and the inner wall of the winding channel 9 during winding, so as to avoid damage to polymer materials such as fiber filaments.

[0052] In another technical solution, a counter is provided on the lifting plate 3. Specifically, mounting holes are preset on the lifting plate 3, and the counter base is fastened to the lifting plate 3 by bolts. The purpose of setting the counter on the lifting plate 3 is to accurately record the number of times the lifting plate 3 rises and falls. When the device performs fatigue resistance testing on polymer materials, the lifting plate 3 rises and falls repeatedly, and the counter works synchronously. By accurately counting the number of rises and falls, key data is provided for the test.

[0053] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A fatigue testing device for polymer materials, characterized in that, include: Base; A linear actuator, the fixed end of which is located on the base, and the moving end of the linear actuator moves in a vertical direction; a lifting plate, which is located on the moving end of the linear actuator; and multiple clamping parts, each clamping part including two clamps, one clamp being located on the base and the other clamping plate, the two clamps being used to clamp the two ends of the polymer material respectively.

2. The polymer material fatigue testing device as described in claim 1, characterized in that, A pair of support columns are also erected on the base, with the pair of support columns respectively located on both sides of the lifting plate. A first slide rail is vertically provided on the inner side of the support column, and a first slider is slidably provided on the first slide rail. The pair of first sliders are respectively fixedly connected to both sides of the lifting plate.

3. The polymer material fatigue testing device as described in claim 2, characterized in that, The clamping device includes: a pair of clamping plates, which are slidably arranged relative to each other, and an arc-shaped clamping opening is provided on one side of the pair of clamping plates; a fixing screw, which is movably arranged on the pair of clamping plates, and the two ends of the fixing screw are limited and fixed by nuts.

4. The polymer material fatigue testing device as described in claim 3, characterized in that, An anti-slip layer is applied to the opposite side of a pair of clamping plates.

5. The polymer material fatigue testing device as described in claim 3, characterized in that, Both the base and the lifting plate are horizontally provided with multiple second slide rails, and multiple second sliders are slidably provided on the second slide rails. The multiple second sliders are fixedly connected to the clamping plates of multiple clamping devices in a one-to-one correspondence.

6. The polymer material fatigue testing device as described in claim 5, characterized in that, The second slide rail is provided with a plurality of first positioning holes along its length; the second slider is provided with a second positioning hole corresponding to the first positioning hole, and positioning pins are detachably inserted into the corresponding second positioning hole and the first positioning hole, and the two ends of the positioning pins are limited and fixed by nuts.

7. The polymer material fatigue testing device as described in claim 3, characterized in that, The surface of the clamping plate is recessed with a winding channel that communicates with the clamping opening. The winding channel is used to wind and accommodate soft polymer materials.

8. The polymer material fatigue testing device as described in claim 7, characterized in that, An elastic buffer layer is provided on the inner wall of the winding channel.

9. The polymer material fatigue testing device as described in claim 1, characterized in that, A counter is provided on the lifting plate.

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