A device for testing the bending fatigue performance of plastic filaments

Abstract

This utility model relates to the field of plastic filament testing technology and discloses a device for testing the bending fatigue performance of plastic filaments. The device includes a testing platform, a controller fixedly mounted on the side wall of the testing platform, a display fixedly mounted on the testing platform and electrically connected to the controller, a concave seat fixedly connected to the top surface of the testing platform, a tensioning component mounted on the concave seat, two sliding blocks symmetrically slidably connected to the concave seat, the sliding blocks slidingly engaging with the concave seat, a support base fixedly connected to the top surface of each of the two sliding blocks, a clamping component provided on the support base, and a plastic filament body clamped and mounted on the support base via the clamping component. A driving testing component is provided on the testing platform. This utility model not only allows the plastic filament to be adjusted to a naturally extended state, effectively ensuring the consistency of the bending fatigue test conditions, but also reduces frictional wear and damage to the plastic filament sample, ensuring that the test only reflects the bending fatigue performance of the material itself.

Description

Technical Field

[0001] This utility model relates to the field of plastic filament testing technology, specifically to a device for testing the bending fatigue performance of plastic filaments. Background Technology

[0002] Insect nets are commonly used insect control tools in agriculture, horticulture, and civilian fields. Their service life and protective stability depend directly on the performance of the materials used in their manufacture. Among these materials, plastic filaments are the core component of insect nets, and their bending fatigue performance is one of the key indicators.

[0003] In actual use, insect nets are exposed to the outdoor environment for a long time and are frequently subjected to wind loads and external force, causing the plastic filaments to undergo repeated bending deformation. If the bending fatigue performance is insufficient, problems such as breakage and embrittlement are likely to occur, which will cause holes in the insect net, lose its insect-proof function, and affect the protective effect and service life. Therefore, it is necessary to conduct bending fatigue tests on the plastic filaments.

[0004] Currently, bending fatigue performance tests on plastic filaments used in insect-proof netting are mostly conducted manually. This involves workers manually bending the filaments and visually judging the results. This method is not only inefficient, but also difficult to control the bending force, making it hard to ensure consistency in each bending action and easily damaging the plastic filaments. Furthermore, manual operation makes it difficult to keep the filaments in a naturally extended state, and the bending process can generate hard friction, further damaging the filaments and affecting the accuracy of the test results.

[0005] Therefore, this application proposes a device for testing the bending fatigue performance of plastic filaments in order to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a device for testing the bending fatigue performance of plastic filaments, so as to solve the problems mentioned in the background art, such as the reliance on manual operation, low efficiency, poor consistency, easy damage to the sample, and inaccurate test results in existing plastic filament bending fatigue tests.

[0007] This utility model provides the following technical solution: a plastic filament bending fatigue performance testing device, including a testing platform, a controller fixedly installed on the side wall of the testing platform, a display fixedly installed on the testing platform, the display being electrically connected to the controller, a concave seat fixedly connected to the top surface of the testing platform, a tensile component installed on the concave seat, two slide blocks symmetrically slidably connected to the concave seat, the slide blocks slidingly engaging with the concave seat, a support base fixedly connected to the top surface of each of the two slide blocks, a clamping component provided on the support base, a plastic filament body clamped and installed on the support base by the clamping component, and a driving testing component provided on the testing platform.

[0008] Preferably, the tensioning assembly includes a rotating rod rotatably connected within the concave seat, a bidirectional screw fixedly sleeved on the outer ring of the rotating rod, both slides being threadedly connected to the bidirectional screw, and a rocker arm fixedly connected to the end of the rotating rod extending out of the concave seat.

[0009] Preferably, the clamping assembly includes a fixed clamp fixedly connected to the support base, a sliding clamp slidably mounted on the support base, and flexible pads fixedly connected to the inner sides of both the fixed clamp and the sliding clamp.

[0010] Preferably, the top surface of the support base has a groove, a screw is rotatably connected inside the support base, a handwheel is fixedly connected to the end of the screw, a slider is threadedly connected to the outer ring of the screw, the slider slides in the groove, and the top surface of the slider is fixedly connected to the bottom surface of the sliding clamp.

[0011] Preferably, the drive test assembly includes a bracket fixedly installed on the test bench, a vertically arranged cylinder fixedly installed on the top of the bracket, a piston slidably assembled inside the cylinder, a pressure roller frame fixedly connected to the lower end of the piston, and a flexible pressure roller rotatably connected to the pressure roller frame, the flexible pressure roller being horizontally positioned directly above the plastic filament body.

[0012] Preferably, a vision probe is fixedly installed on the bracket, the vision probe is aligned with the middle position of the plastic filament body, and the vision probe is electrically connected to the controller and the display respectively.

[0013] This utility model has the following beneficial effects: This device can adjust the plastic filament to a naturally stretched state without excess pre-tension stress, ensuring a uniform and stable test standard and effectively guaranteeing the consistency of bending fatigue test conditions.

[0014] The device provides a gentle and smooth contact during the reciprocating bending test, which can significantly reduce the wear and damage to the plastic wire sample caused by friction, ensuring that the test only reflects the bending fatigue performance of the material itself.

[0015] The device is equipped with visual real-time monitoring and automatic judgment functions, eliminating the need for constant manual observation, reducing errors caused by subjective human judgment, and improving the accuracy and standardization of detection and judgment.

[0016] The device is easy and smooth to install and adjust, with uniform and moderate clamping force, and a stable grip that is not easy to slip or shift. At the same time, it can avoid damaging the plastic filaments.

[0017] This device can be adapted to clamp and test plastic wires of different thicknesses and specifications, and has strong versatility and adaptability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0020] Figure 3 This is a schematic diagram of the tensioning component and clamping component of this utility model.

[0021] Figure 4 For the present utility model Figure 3 Schematic diagram of the clamping component structure.

[0022] In the diagram: 1. Test bench; 2. Controller; 3. Display; 4. Concave seat; 5. Tensile assembly; 51. Rotating rod; 52. Bidirectional screw; 53. Rocker arm; 6. Slide seat; 7. Support seat; 8. Plastic filament body; 9. Clamping assembly; 91. Fixed clamp; 92. Sliding clamp; 93. Flexible pad; 94. Groove; 95. Screw; 96. Handwheel; 97. Slider; 10. Drive test assembly; 101. Bracket; 102. Cylinder; 103. Piston; 104. Pressure roller frame; 105. Flexible pressure roller; 106. Vision probe. Detailed Implementation

[0023] 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.

[0024] Example: This example aims to address the problems of existing plastic filament bending fatigue performance testing devices, such as inconvenient clamping, easy sample damage or slippage during clamping, difficulty in controlling tension to a natural extension state, easy frictional damage to the sample during bending testing, and low efficiency and accuracy due to the need for manual monitoring and judgment during the testing process. Please refer to [link to relevant documentation]. Figure 1 A device for testing the bending fatigue performance of plastic filaments includes a test platform 1, a controller 2 fixedly installed on the side wall of the test platform 1, a display 3 fixedly installed on the test platform 1, the display 3 being electrically connected to the controller 2, a concave seat 4 fixedly connected to the top surface of the test platform 1, a tensioning assembly 5 installed on the concave seat 4, the tensioning assembly 5 including a rotating rod 51 rotatably connected within the concave seat 4, a bidirectional screw 52 fixedly sleeved on the outer ring of the rotating rod 51, two sliding seats 6 being threadedly connected to the bidirectional screw 52, ​​and a rocker arm 53 fixedly connected to the end of the rotating rod 51 extending out of the concave seat 4.

[0025] Please see Figure 3and Figure 4 Two slide blocks 6 are symmetrically slidably connected to the concave seat 4. The slide blocks 6 are slidably engaged with the concave seat 4. The top surfaces of the two slide blocks 6 are fixedly connected to the support seats 7. The support seats 7 are provided with clamping components 9. The clamping components 9 include a fixed clamp 91 fixedly connected to the support seats 7 and a sliding clamp 92 slidably assembled on the support seats 7. Flexible pads 93 are fixedly connected to the inner sides of the fixed clamp 91 and the sliding clamp 92. The top surface of the support seats 7 is provided with a groove 94. A screw 95 is rotatably connected inside the support seats 7. A handwheel 96 is fixedly connected to the end of the screw 95. A slider 97 is threadedly connected to the outer ring of the screw 95. The slider 97 is set in a stepped structure. The groove 94 is adapted to it to form a vertical limit. The slider 97 and the groove 94 are slidably engaged. The top surface of the slider 97 is fixedly connected to the bottom surface of the sliding clamp 92.

[0026] Please see Figure 2 A plastic filament body 8 is clamped and mounted on the support base 7 via a clamping assembly 9. A driving test assembly 10 is provided on the test bench 1. The driving test assembly 10 includes a bracket 101 fixedly mounted on the test bench 1. A vertically arranged cylinder 102 is fixedly mounted on the top of the bracket 101. A piston 103 is slidably assembled inside the cylinder 102. A pressure roller frame 104 is fixedly connected to the lower end of the piston 103. A flexible pressure roller 105 is rotatably connected to the pressure roller frame 104. The flexible pressure roller 105 is horizontally positioned directly above the plastic filament body 8. A vision probe 106 is fixedly mounted on the bracket 101. The vision probe 106 is an industrial-grade high-definition vision probe 106, such as the ED-AIC3000 model. This model is only an example; the appropriate model can be selected based on actual application requirements. The vision probe 106 is existing technology and will not be described in detail here. The vision probe 106 is aligned with the middle of the plastic filament body 8 and is electrically connected to the controller 2 and the display 3.

[0027] In this embodiment: When using this device to test the bending fatigue performance of plastic filaments, the operator first rotates the rocker arm 53 of the tensioning assembly 5. The rocker arm 53 drives the rotating rod 51 to rotate within the concave seat 4. When the rotating rod 51 rotates, it drives the bidirectional screw 52, ​​which is fixedly sleeved on the outer ring, to rotate synchronously. Since both slides 6 are threadedly connected to the bidirectional screw 52, ​​and the two ends of the bidirectional screw 52 have reverse threads, the rotation of the bidirectional screw 52 will drive the two slides 6 to slide symmetrically along the concave seat 4. At this time, the rotation direction of the rocker arm 53 is controlled so that the two slides 6 move closer to each other until the distance between the two support seats 7 is convenient for the operator to install the plastic filament body 8.

[0028] The operator then places both ends of the plastic filament body 8 to be tested on two support seats 7, with one side close to the fixed clamp 91. Then, the operator rotates the handwheel 96 on the support seat 7. The handwheel 96 drives the screw 95 to rotate inside the support seat 7. When the screw 95 rotates, it drives the slider 97 connected by the outer ring thread to slide along the groove 94 on the top surface of the support seat 7. When the slider 97 slides, it drives the sliding clamp 92 fixedly connected to the top surface to move synchronously, so that the sliding clamp 92 moves closer to the fixed clamp 91 until the flexible pad 93 on the inner side of the fixed clamp 91 and the sliding clamp 92 is tightly fitted with the plastic filament body 8, thus completing the clamping and fixing of the plastic filament body 8. The flexible pad 93 can avoid damage to the plastic filament body 8 during the clamping process, and at the same time enhance the stability of the clamping and prevent the plastic filament body 8 from slipping during the test.

[0029] After the plastic filament body 8 is clamped, the operator rotates the rocker arm 53 of the tensioning assembly 5 in the opposite direction, causing the rotating rod 51 and the bidirectional screw 52 to rotate in the opposite direction. This causes the two slide blocks 6 to slide along the concave seat 4 in a direction away from each other. The slide blocks 6 drive the support seat 7 and the clamped plastic filament body 8 to move synchronously until the plastic filament body 8 is stretched to its natural extension state. At this point, the rocker arm 53 is stopped, and the bidirectional screw 52 can achieve self-locking, keeping the two slide blocks 6 in their current positions. This ensures that the plastic filament body 8 is always in a state of natural extension, without slack or additional pre-tension, providing a stable test condition for subsequent bending fatigue testing.

[0030] Next, the operator sets the required number of bends and the reciprocating frequency of the cylinder 102 through the controller 2. After the parameters are set, the controller 2 starts the drive test component 10, and the cylinder 102 starts to work, driving the internally sliding piston 103 to move up and down. When the piston 103 moves up and down, it drives the pressure roller frame 104 fixedly connected at the lower end to move synchronously. The pressure roller frame 104 drives the flexible pressure roller 105 rotatably connected at the bottom to move up and down together.

[0031] Since the flexible pressure roller 105 is horizontally positioned directly above the plastic filament body 8, when the flexible pressure roller 105 moves downward, it will contact the middle of the plastic filament body 8 and apply downward pressure to the plastic filament body 8, causing the plastic filament body 8 to bend and deform. When the flexible pressure roller 105 moves upward, the plastic filament body 8 will rebound to its natural extended state under its own elasticity. This cycle repeats, realizing the periodic bending fatigue test of the plastic filament body 8. The flexible pressure roller 105 can rotate freely and form rolling contact when it contacts the plastic filament body 8, avoiding sliding friction from damaging the plastic filament body 8.

[0032] During the test, the vision probe 106 fixedly installed on the bracket 101 is always aligned with the middle position of the plastic filament body 8, and collects image information of the bent part of the plastic filament body 8 in real time. The vision probe 106 transmits the collected image information to the controller 2 and the display 3 in real time. The display 3 displays the status of the plastic filament body 8 and the current number of bends in real time, so that the operator can intuitively observe the test progress and the surface condition of the plastic filament body 8.

[0033] The controller 2 analyzes the image information transmitted by the vision probe 106 in real time to determine whether the plastic filament body 8 has failed due to breakage, obvious cracks, or other defects, and simultaneously counts the number of bends in real time. If the plastic filament body 8 breaks or develops obvious cracks before reaching the preset number of bends, the controller 2 determines that the bending fatigue performance of the plastic filament body 8 is unqualified, and automatically controls the cylinder 102 to stop working, locks the current test data, and the display 3 synchronously displays the test results and the reasons for failure.

[0034] If the preset number of bending cycles is reached and the plastic filament body 8 still does not break, and the image collected by the vision probe 106 shows that there are no obvious cracks or abnormal whitening on the surface of the plastic filament body 8, the controller 2 determines that the bending fatigue performance of the plastic filament body 8 is qualified. Then, the controller cylinder 102 is automatically stopped, and the test data and qualified results are stored and displayed on the display 3.

[0035] After the test is completed, the operator turns off the power to the device, rotates the handwheel 96 on the support base 7 to move the sliding clamp 92 away from the fixed clamp 91, releases the clamp on the plastic filament body 8, removes the tested plastic filament body 8, and then rotates the rocker arm 53 of the tensioning component 5 to bring the two sliding blocks 6 closer together, returning them to their initial positions for the next test. The entire testing process is controlled by the controller 2, which is easy to operate, provides accurate test data, and effectively enables precise detection of the bending fatigue performance of plastic filaments.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for testing the bending fatigue properties of plastic filaments, comprising a test bench (1), characterized in that: A controller (2) is fixedly installed on the side wall of the test bench (1). A display (3) is fixedly installed on the test bench (1). The display (3) is electrically connected to the controller (2). A concave seat (4) is fixedly connected to the top surface of the test bench (1). A tensioning component (5) is installed on the concave seat (4). Two slides (6) are symmetrically slidably connected to the concave seat (4). The slides (6) are slidably engaged with the concave seat (4). A support seat (7) is fixedly connected to the top surface of each of the two slides (6). A clamping component (9) is provided on the support seat (7). A plastic filament body (8) is clamped and installed on the support seat (7) by the clamping component (9). A driving test component (10) is provided on the test bench (1).

2. The device for testing the bending fatigue performance of plastic filaments according to claim 1, characterized in that: The tensioning assembly (5) includes a rotating rod (51) rotatably connected in the concave seat (4), a bidirectional screw (52) fixedly sleeved on the outer ring of the rotating rod (51), and both slides (6) threadedly connected to the bidirectional screw (52). A rocker arm (53) is fixedly connected to the end of the rotating rod (51) extending out of the concave seat (4).

3. The device of claim 1, wherein: The clamping assembly (9) includes a fixed clamp (91) fixedly connected to the support base (7), and a sliding clamp (92) slidably mounted on the support base (7). Flexible pads (93) are fixedly connected to the inner sides of the fixed clamp (91) and the sliding clamp (92).

4. The device of claim 3, wherein: The top surface of the support base (7) is provided with a groove (94), and a screw (95) is rotatably connected inside the support base (7). A handwheel (96) is fixedly connected to the end of the screw (95). A slider (97) is threadedly connected to the outer ring of the screw (95). The slider (97) slides with the groove (94), and the top surface of the slider (97) is fixedly connected to the bottom surface of the sliding clamp (92).

5. The device of claim 1, wherein: The drive test assembly (10) includes a bracket (101) fixedly installed on the test bench (1). A vertically arranged cylinder (102) is fixedly installed on the top of the bracket (101). A piston (103) is slidably assembled inside the cylinder (102). A pressure roller frame (104) is fixedly connected to the lower end of the piston (103). A flexible pressure roller (105) is rotatably connected to the pressure roller frame (104). The flexible pressure roller (105) is horizontally positioned directly above the plastic filament body (8).

6. The device of claim 5, wherein: A vision probe (106) is fixedly installed on the bracket (101). The vision probe (106) is aligned with the middle position of the plastic filament body (8). The vision probe (106) is electrically connected to the controller (2) and the display (3).

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