A plastic product fatigue testing apparatus

Abstract

The utility model provides a kind of plastic product fatigue test equipment, including work base, support structure, support fixture, force clamp, force threaded rod, plastic product and test structure, wherein: support structure is fixedly installed in the both ends of work base surface, and support fixture is fixedly installed in the top of two groups of support structure, this force clamp is slidably installed on support fixture, and is fixed in position by force threaded rod;The plastic product is clamped between support fixture and force clamp;The test structure is fixedly installed in the middle position of work base surface;The utility model support structure and the setting of test structure, the fatigue test of plastic product can be accurately carried out, and sample stress can be close to real use state.

Description

Technical Field

[0001] This utility model relates to the field of plastic product testing technology, and in particular to a fatigue testing device for plastic products. Background Technology

[0002] In industrial production and product development, fatigue performance testing of plastic materials has significant engineering value. With the widespread application of polymer materials in automotive parts, electronics, and medical devices, traditional static mechanical testing methods can no longer meet the needs of material durability assessment. However, existing fatigue testing equipment for plastic products still suffers from limitations in accurately performing fatigue tests and in failing to accurately simulate real-world usage conditions.

[0003] Therefore, it is essential to invent a fatigue testing device for plastic products. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a fatigue testing device for plastic products, solving the issues that existing fatigue testing devices for plastic products still cannot accurately perform fatigue tests, and the stress on the samples cannot closely approximate the actual usage conditions. The fatigue testing device for plastic products includes a working base, a support structure, a support clamp, a force-applying clamp, a force-applying threaded rod, a plastic product, and a testing structure. The support structure is fixedly installed at both ends of the working base surface, and the support clamp is fixedly installed on top of the two sets of support structures. The force-applying clamp is slidably installed on the support clamp and its position is fixed by the force-applying threaded rod. The plastic product is clamped between the support clamp and the force-applying clamp. The testing structure is fixedly installed at the middle position of the working base surface.

[0005] The support structure includes a mounting base, a mating support plate, a connecting seat, and a connecting groove. The mounting base is fixedly installed at both ends of the surface of the working platform, and the mating support plate is fixedly installed above the mounting base. The connecting seat is fixedly installed at the top of the mating support plate, and the connecting groove is opened on the surface of the connecting seat. A support clamp is slidably installed inside the connecting groove.

[0006] The test structure includes a stabilizing support plate, a force-applying push rod, a movable base, and a force-guiding roller. The stabilizing support plate is fixedly installed at the middle position on the surface of the working platform, and the force-applying push rod is fixedly installed on the surface of the stabilizing support plate. The movable base is fixedly installed at the top of the force-applying push rod, and the force-guiding roller is rotatably installed on the surface of the movable base.

[0007] The connecting seats inside the support structure are made of a pair of stainless steel metal structures, and the connecting seats are connected to the support clamps through connecting grooves; the mating support plate is a set of rectangular plastic plates, and a steel sheet is embedded inside the mating support plate. The mating support plate is perpendicular to the working base when it is not under force; the mating support plate will bend when under force, and the bending of the mating support plate will return to its original position when the external force is removed; the mating support plate can bend to accommodate the bending of the plastic product.

[0008] The guide roller inside the test structure consists of two steel metal rollers, which are respectively attached to the upper and lower surfaces of the plastic product. The guide roller can rotate on the surface of the moving base when the plastic product is fed in. The guide roller can move back and forth in the vertical direction by being driven by the force-applying push rod, and the movement of the guide roller can pull the plastic product to produce continuous bending.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The support structure of this utility model is used to fix plastic products and provide dynamic elastic support. It is fixed to the working platform by a mounting base, and the support plate adopts a composite structure of steel core and plastic, ensuring initial rigid support while allowing for synchronous elastic deformation with the bending of the plastic product, avoiding stress concentration. The sliding groove on the connecting seat allows the support fixture to slide and adjust to accommodate different plastic product sizes. During testing, the support structure and the testing structure work together to form a dynamic three-point bending system, making the stress on the plastic product more closely resemble real working conditions. Simultaneously, the self-recovery characteristic after elastic deformation ensures the repeatability and accuracy of the test, making it particularly suitable for fatigue performance evaluation of flexible plastic products.

[0011] 2. The test structure of this utility model applies bending loads to plastic products by driving a guide roller with a force-applying push rod, achieving precise fatigue performance testing. Its rolling contact design ensures pure force application and can simulate various working conditions. Through its synergy with the elastic support plate of the support structure, a dynamic three-point bending system is formed, making the stress on the plastic product more closely resemble its actual usage state. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the support structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the test structure of this utility model.

[0015] In the picture:

[0016] 1. Working base, 2. Support structure, 21. Mounting base, 22. Matching support plate, 23. Connecting seat, 24. Connecting slide, 3. Support clamp, 4. Force-applying clamp, 5. Force-applying threaded rod, 6. Plastic product, 7. Testing structure, 71. Stabilizing support plate, 72. Force-applying push rod, 73. Moving base, 74. Guide roller. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] As attached Figure 1 To be continued Figure 3 As shown.

[0019] This utility model provides a fatigue testing device for plastic products, including a working base 1, a support structure 2, a support clamp 3, a force-applying clamp 4, a force-applying threaded rod 5, a plastic product 6, and a testing structure 7. The support structure 2 is fixedly installed at both ends of the surface of the working base 1, and the support clamp 3 is fixedly installed on the top of the two sets of support structures 2. The force-applying clamp 4 is slidably installed on the support clamp 3 and its position is fixed by the force-applying threaded rod 5. The plastic product 6 is clamped between the support clamp 3 and the force-applying clamp 4. The testing structure 7 is fixedly installed at the middle position of the surface of the working base 1.

[0020] The support structure 2 includes a mounting base 21, a mating support plate 22, a connecting seat 23, and a connecting groove 24. The mounting base 21 is fixedly installed at both ends of the surface of the working base 1, and the mating support plate 22 is fixedly installed above the mounting base 21. The connecting seat 23 is fixedly installed at the top of the mating support plate 22, and the connecting groove 24 is opened on the surface of the connecting seat 23. A support clamp 3 is slidably installed inside the connecting groove 24.

[0021] The test structure 7 includes a stabilizing support plate 71, a force-applying push rod 72, a movable base 73, and a guide roller 74. The stabilizing support plate 71 is fixedly installed at the middle position on the surface of the working base 1, and the force-applying push rod 72 is fixedly installed on the surface of the stabilizing support plate 71. The movable base 73 is fixedly installed at the top of the force-applying push rod 72, and the guide roller 74 is rotatably installed on the surface of the movable base 73.

[0022] The connecting seat 23 inside the support structure 2 is a pair of stainless steel metal structures, and the connecting seat 23 is connected to the support clamp 3 through the connecting groove 24; the mating support plate 22 is a set of rectangular plastic plates, and a steel sheet is embedded inside the mating support plate 22. The mating support plate 22 is perpendicular to the working base 1 when it is not under force; the mating support plate 22 will bend when under force, and the bending of the mating support plate 22 will return to its original position when the external force is removed; the mating support plate 22 can bend to accommodate the bending of the plastic product 6.

[0023] The guide roller 74 inside the test structure 7 consists of two steel metal rollers, and the guide roller 74 is respectively attached to the upper and lower surfaces of the plastic product 6. The guide roller 74 can rotate on the surface of the moving base 73 when the plastic product 6 is fed in. The guide roller 74 can reciprocate in the vertical direction by being driven by the force-applying push rod 72, and the movement of the guide roller 74 can pull the plastic product 6 to produce continuous bending.

[0024] This fatigue testing equipment for plastic products simulates the material fatigue process under actual working conditions through electromechanical synergy. First, the two ends of the plastic product 6 are fixed between the support clamp 3 and the force-applying clamp 4. During testing, the force-applying push rod 72 drives the double guide roller 74 to apply a precise and controllable cyclic bending load to the middle of the plastic product. Simultaneously, the elastic support plate 22 of the support structure 2 matches the deformation of the plastic product in real time, forming a dynamic three-point bending test system. This system ensures pure force application through rolling contact. Combined with the adjustable clamp and guide roller 74 design, it can accurately evaluate the fatigue characteristics of different specifications of plastic products under cyclic loads, such as crack propagation and mechanical property degradation, providing a standardized testing scheme for product durability verification.

[0025] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A fatigue testing device for plastic products, characterized in that: The device includes a working base (1), a support structure (2), a support clamp (3), a force-applying clamp (4), a force-applying threaded rod (5), a plastic product (6), and a test structure (7). The support structure (2) is fixedly installed at both ends of the surface of the working base (1), and the support clamp (3) is fixedly installed on the top of the two sets of support structures (2). The force-applying clamp (4) is slidably installed on the support clamp (3) and its position is fixed by the force-applying threaded rod (5). The plastic product (6) is clamped between the support clamp (3) and the force-applying clamp (4). The test structure (7) is fixedly installed at the middle position of the surface of the working base (1).

2. The fatigue testing equipment for plastic products as described in claim 1, characterized in that: The support structure (2) includes a mounting base (21), a mating support plate (22), a connecting seat (23), and a connecting groove (24). The mounting base (21) is fixedly installed at both ends of the surface of the working base (1), and the mating support plate (22) is fixedly installed above the mounting base (21). The connecting seat (23) is fixedly installed at the top of the mating support plate (22), and the connecting groove (24) is opened on the surface of the connecting seat (23). A support clamp (3) is slidably installed inside the connecting groove (24).

3. The fatigue testing equipment for plastic products as described in claim 1, characterized in that: The test structure (7) includes a stabilizing support plate (71), a force-applying push rod (72), a movable base (73), and a guide roller (74). The stabilizing support plate (71) is fixedly installed at the middle position on the surface of the working base (1), and the force-applying push rod (72) is fixedly installed on the surface of the stabilizing support plate (71). The movable base (73) is fixedly installed at the top of the force-applying push rod (72), and the guide roller (74) is rotatably installed on the surface of the movable base (73).

4. The fatigue testing equipment for plastic products as described in claim 2, characterized in that: The connecting seat (23) inside the support structure (2) is a pair of stainless steel metal structures, and the connecting seat (23) is connected to the support clamp (3) through the connecting groove (24); the mating support plate (22) is a set of rectangular plastic plates, and a steel sheet is embedded inside the mating support plate (22). When the mating support plate (22) is not under force, it is perpendicular to the working base (1); the mating support plate (22) will bend when under force, and the bending of the mating support plate (22) will return to its original position when the external force is removed; the mating support plate (22) can bend in accordance with the bending of the plastic product (6).

5. The fatigue testing equipment for plastic products as described in claim 3, characterized in that: The guide roller (74) inside the test structure (7) is made of two steel metal rollers, and the guide roller (74) is respectively attached to the upper and lower surfaces of the plastic product (6). The guide roller (74) can rotate on the surface of the moving base (73) when the plastic product (6) is fed in. The guide roller (74) can move back and forth in the vertical direction by being driven by the force push rod (72), and the movement of the guide roller (74) can pull the plastic product (6) to produce continuous bending.

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