Intelligent paper tape wear resistance testing machine and use method thereof

Abstract

The invention discloses an intelligent paper tape wear resistance tester and a use method thereof, and relates to the field of wear resistance testers, the intelligent paper tape wear resistance tester comprises a paper tape driving member, a power supply module and a pressing seat, an electromagnet is designed to cooperate with a permanent magnet, during use, the electromagnet is started through the power supply module, and the paper tape is driven by the pressing seat; meanwhile, a current modulator and an H-bridge module in the power supply module are used for changing the magnitude, frequency, amplitude and direction of current, so that the magnetic force and magnetic pole of an electromagnet are changed, the electromagnet forms magnetic attraction force on a permanent magnet, the extrusion state of a pressing wheel and a test piece is changed, and a final pressure value is determined through a pressure sensor; therefore, different testing modes of constant pressure, variable pressure and point contact are achieved, the pressure and the change frequency are adjustable, compared with a traditional balance weight mode, the pressure adjusting range, the pressing mode and the testing mode are remarkably improved, the device is more suitable for different industries and materials, and the testing scheme is practical.

Description

Technical Field

[0001] This invention relates to the field of abrasion testing machines, and in particular to an intelligent paper tape abrasion testing machine and its usage method. Background Technology

[0002] The paper tape abrasion tester is a tester that uses a special paper tape to continuously move over the surface of a test piece. The number of rubs is used to reflect the abrasion resistance of the test piece. It is commonly used for strength testing of electronic product casings, product coatings, and other smooth surfaces formed after treatment.

[0003] Existing paper tape abrasion testers have a relatively simple structure. The pressure rollers used to press down the paper tape naturally rely on gravity, and a counterweight at the other end is used through leverage to reduce the downward pressure, thereby changing the pressure magnitude. However, while this design is convenient for traditional single-type tests, it cannot effectively simulate real-world usage environments in current industrial production, such as in the manufacture of special coatings. It cannot accurately control the pressure, speed, and friction mode of the paper tape during friction. Furthermore, in long-cycle testing, existing paper tape abrasion testers drive the paper tape winding by rotation at the winding end. As more paper tape is wound, the diameter of the paper rollers increases, while the motor output power remains constant, resulting in a constant motor angular velocity. This leads to an excessive increase in the linear velocity of the paper tape, affecting the test structure. Therefore, an intelligent paper tape abrasion tester and its usage method are provided. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent paper tape abrasion tester and its usage method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an intelligent paper tape abrasion resistance testing machine, comprising: Test bench; A paper roll release frame is fixedly installed at one end of the test bench; A paper roller winding frame is fixedly installed at the other end of the test bench; A paper tape drive unit is disposed between the paper roll release frame and the paper roll take-up frame, and has two closely fitted drive rollers on it for pulling the paper tape to move. A test piece stage is disposed between the paper roller release frame and the paper belt drive component; The power supply module is fixedly mounted on the test bench and integrates a current modulator and an H-bridge module. A pressure seat is fixedly installed on the back of the test piece stage, and a paper pressing component is slidably installed on the pressure seat. An electromagnet is fixedly installed on the inner bottom of the pressure seat, and a permanent magnet connected to the paper pressing component is movably installed on the top of the electromagnet. The electromagnet is connected to the power module through the current modulator and H-bridge module, thereby changing the magnetic force and magnetic poles of the electromagnet, so that the paper pressing component is in a preset state on the test bench.

[0006] Preferably, the paper pressing component includes a carrier frame slidably disposed on the pressing base, a connecting frame fixedly installed on the outer surface of the carrier frame, a connecting column movably disposed at the bottom of the connecting frame, a pressure sensor disposed at the top of the connecting column, a pressure roller detachably disposed at the bottom end of the connecting column, and limit rollers disposed on both sides of the connecting column.

[0007] Preferably, an electric telescopic rod is fixedly installed at the inner end of the carrier, a support plate is fixedly installed between the electric telescopic rod and the permanent magnet, slide rails are fixedly installed on both sides of the inner wall of the pressure seat, the two ends of the support plate are slidably arranged on the slide rails, and a memory spring for supporting the support plate is movably sleeved at the bottom end of the slide rails.

[0008] Preferably, the paper tape drive includes a drive frame, a power motor is installed at the bottom of the drive frame, a drive belt is installed between the power motor and the drive roller, a split belt is installed between the drive roller and the paper roller winding frame, and the drive roller is provided with an anti-slip part and a limiting part.

[0009] Preferably, a take-up shaft is rotatably mounted on the paper roller take-up frame, a paper winding head is movably sleeved on the take-up shaft, and a friction rubber pad for transmitting power is installed between the paper winding head and the take-up shaft. A drive shaft is rotatably mounted on one side of the take-up shaft, and meshing power gears are fixedly sleeved on the drive shaft and the take-up shaft, respectively.

[0010] Preferably, the drive roller includes a first roller and a second roller rotatably disposed on both sides of the top of the drive frame; the anti-slip part includes a silicone anti-slip sleeve fixedly disposed on the outer wall of the first roller and the second roller; the limiting part includes a positioning clamp movably disposed on the outer wall of the second roller; the ends of the two sets of drive rollers are respectively equipped with mutually meshing transmission gears; the drive belt is installed between the power motor and the first roller; and the two ends of the distribution belt are installed between the second roller and the transmission shaft.

[0011] Preferably, the drive roller includes a threaded roller rotatably disposed on the top of the drive frame, the limiting part includes a threaded paper roll groove formed on the outer wall of the threaded roller, the anti-slip part includes a silicone pad fixedly pasted to the bottom of the threaded paper roll groove, the drive belt is installed between the power motor and the threaded roller, and the transfer belt is installed between the threaded roller and the drive shaft.

[0012] Preferably, the paper roll take-up frame includes a support arm fixed on the test bench, the take-up shaft is rotatably connected in the support arm, the outer wall of the take-up shaft is provided with two clamps, the paper roll head is disposed between the two clamps, and there are two sets of friction rubber pads, which are respectively fixedly disposed on the inner side of the two clamps. The outer end of the take-up shaft is threaded with a locking nut.

[0013] Preferably, the drive frame is provided with a feeding positioning roller and a tensioning roller inside. The feeding positioning roller is rotatably mounted on the drive frame. The drive frame has grooves on both sides. The two ends of the tensioning roller slide in the grooves, and a tensioning spring is installed between the inner top of the groove and the tensioning roller.

[0014] A method for using an intelligent paper tape abrasion tester includes the following steps: S1. Select the appropriate test mode through the power supply module according to the test method, including constant voltage mode, transformer mode and contact mode; S2. After loading the sample, the pressure roller is moved down by the power module so that the test paper contacts the sample and the pressure sensor value is zero. S3. Adjust the current modulator and H-bridge module according to the test pressure range; In constant voltage mode, the electromagnet is adjusted to the target constant magnetic force; In transformer mode, the amplitude and frequency of the current are adjusted to achieve periodic changes in the magnetic force of the electromagnet within a threshold range; In touch mode, the electromagnet is adjusted to the target constant magnetic force, and then the magnetic poles are changed periodically through the H-bridge module.

[0015] The technical effects and advantages of this invention are as follows: 1. This intelligent paper tape abrasion tester utilizes a design that combines an electromagnet and a permanent magnet. During operation, the electromagnet is activated via a power module. Simultaneously, the current modulator and H-bridge module within the power module alter the current magnitude, frequency, amplitude, and direction, thereby changing the electromagnet's magnetic force and poles. The electromagnet attracts the permanent magnet, causing the pressure roller to compress the specimen. A pressure sensor determines the final pressure and compares it to a preset value for pressure adjustment during paper tape abrasion testing. Compared to traditional counterweight methods, this design offers significant improvements in pressure adjustment range, compression method, and testing method, making it more suitable for various industries, materials, and testing solutions.

[0016] 2. The method of using the intelligent paper tape abrasion tester: In this method, the power module integrates a current modulator and an H-bridge module. The current modulator can adjust the current value and change the current periodically. At the same time, the H-bridge module can also periodically adjust the current direction. Thus, in actual use, it can have multiple test modes such as constant voltage, variable voltage and point contact, which is more convenient and versatile.

[0017] 3. This intelligent paper tape abrasion tester improves the paper tape traction method by changing the traditional paper tape roller traction to drive roller traction, thereby achieving constant speed movement of the paper tape. This avoids the drawback of the paper tape linear speed increasing significantly due to the increase in the amount of paper tape roller winding. At the same time, the drive roller has two forms to choose from, which are suitable for paper tapes with different strengths and friction coefficients. Attached Figure Description

[0018] Figure 1 This is a front view of the entire invention; Figure 2 This is a schematic diagram of the overall frontal outer surface structure of the present invention; Figure 3 This is a schematic diagram of the overall rear outer surface structure of the present invention; Figure 4 This is a cross-sectional view of the top structure of the paper roller take-up frame of the present invention; Figure 5 This is a top-view cross-sectional view of the inside of the paper roller winding frame of the present invention; Figure 6 This is a schematic diagram of the outer surface of the paper tape drive component of the present invention; Figure 7 This is a schematic diagram of the internal structure of the paper tape drive component of the present invention; Figure 8 This is a schematic diagram of the paper tape drive component and threaded roller structure of the present invention; Figure 9 This is a schematic diagram of the outer surface structure of the threaded roller of the present invention; Figure 10 This is a schematic diagram of the outer surface structure of the pressure seat of the present invention; Figure 11This is a schematic diagram of the outer surface structure of the paper pressing component of the present invention; Figure 12 This is a schematic diagram of the internal structure of the pressure seat of the present invention; Figure 13 This is a flowchart illustrating the usage method of the intelligent paper tape abrasion tester of the present invention.

[0019] In the diagram: 1. Test bench; 2. Paper roll release frame; 3. Specimen table; 4. Paper tape drive unit; 41. Drive frame; 42. Feed positioning roller; 43. Tension roller; 44. Power motor; 45. First rotating roller; 46. Second rotating roller; 47. Drive belt; 48. Transmission gear; 49. Tension spring; 410. Positioning clamp; 411. Threaded roller; 412. Threaded paper winding groove; 5. Paper roll take-up frame; 51. Support arm; 52. Clamping plate; 53. 54. Rewind shaft; 55. Drive shaft; 56. Power gear; 57. Paper roll turner; 6. Friction rubber pad; 78. Power module; 79. Pressure seat; 70. Paper pressing component; 71. Carrier frame; 72. Connecting frame; 723. Connecting column; 724. Pressure roller; 725. Pressure sensor; 726. Limit roller; 73. Electromagnet; 74. Memory spring; 75. Electric telescopic rod; 76. Permanent magnet; 77. Pallet; 78. Slide rail; 8. Transfer belt. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0021] This invention provides, for example Figures 1 to 12 The intelligent paper tape abrasion resistance tester shown includes a test bench 1; Paper roller release frame 2 is fixedly installed at one end of test bench 1; The paper roller winding frame 5 is fixedly installed at the other end of the test bench 1; The paper tape drive unit 4 is located between the paper roll release frame 2 and the paper roll take-up frame 5, and has two drive rollers that are closely attached to each other for pulling the paper tape to move. The test piece platform 3 is positioned between the paper roller release frame 2 and the paper belt drive component 4; The power supply module 6 is fixedly mounted on the test bench 1, and it integrates a current modulator and an H-bridge module. The pressure seat 7 is fixedly installed on the back of the test piece stage 3, and a paper pressing component 72 is slidably installed on the pressure seat 7. An electromagnet 73 is fixedly installed on the inner bottom of the pressure seat 7, and a permanent magnet 76 connected to the paper pressing component 72 is movably installed on the top of the electromagnet 73. Electromagnet 73 is connected to power module 6 through current modulator and H-bridge module, thereby changing the magnetic force and magnetic poles of electromagnet 73, so that the paper pressing part 72 is in a preset state on test bench 1.

[0022] The paper pressing component 72 includes a carrier frame 721 slidably disposed on the pressing base 7. A connecting frame 722 is fixedly installed on the outer surface of the carrier frame 721. A connecting column 723 is movably disposed at the bottom of the connecting frame 722. A pressure sensor 725 is disposed at the top of the connecting column 723. A pressure roller 724 is detachably installed at the bottom end of the connecting column 723. Limit rollers 726 are installed on both sides of the connecting column 723.

[0023] An electric telescopic rod 75 is fixedly installed at the inner end of the carrier 721. A support plate 77 is fixedly installed between the electric telescopic rod 75 and the permanent magnet 76. Slide rails 78 are fixedly installed on both sides of the inner wall of the pressure seat 7. The two ends of the support plate 77 are slidably mounted on the slide rails 78, and a memory spring 74 for supporting the support plate 77 is movably sleeved at the bottom end of the slide rails 78.

[0024] The paper tape drive unit 4 includes a drive frame 41, a power motor 44 is installed at the bottom of the drive frame 41, a drive belt 47 is installed between the power motor 44 and the drive roller, a split belt 8 is installed between the drive roller and the paper roller winding frame 5, and the drive roller is provided with an anti-slip part and a limiting part.

[0025] The drive rollers include a first roller 45 and a second roller 46 rotatably mounted on both sides of the top of the drive frame 41. The anti-slip part includes silicone anti-slip sleeves fixedly mounted on the outer walls of the first roller 45 and the second roller 46. The limiting part includes a positioning clamp 410 movably mounted on the outer wall of the second roller 46. The positioning clamp 410 includes two clamping arms that slide on the drive frame 41. A bidirectional lead screw is installed in the two clamping arms. By rotating the bidirectional lead screw, the two clamping arms move towards or away from each other, so that the distance between the two clamping arms is equal to the width of the paper tape, thereby positioning the paper tape. The ends of the two sets of drive rollers are respectively equipped with mutually meshing transmission gears 48. The drive belt 47 is installed between the power motor 44 and the first roller 45. The two ends of the distribution belt 8 are installed between the second roller 46 and the drive shaft 54.

[0026] A take-up shaft 53 is rotatably mounted on the paper roller take-up frame 5. A paper winding head 56 is movably sleeved on the take-up shaft 53. A friction rubber pad 57 for transmitting power is installed between the paper winding head 56 and the take-up shaft 53. A drive shaft 54 ​​is rotatably mounted on one side of the take-up shaft 53. A meshing power gear 55 is fixedly sleeved on the drive shaft 54 ​​and the take-up shaft 53, respectively.

[0027] The paper roll take-up frame 5 includes a support arm 51 fixed on the test bench 1, a take-up shaft 53 rotatably connected in the support arm 51, two clamps 52 are provided on the outer wall of the take-up shaft 53, a paper roll head 56 is provided between the two clamps 52, and two sets of friction rubber pads 57 are fixedly provided on the inner side of the two clamps 52 respectively. A locking nut is threaded to the outer end of the take-up shaft 53.

[0028] The drive frame 41 is equipped with a feeding positioning roller 42 and a tensioning roller 43. The feeding positioning roller 42 is rotatably mounted on the drive frame 41. The drive frame 41 has grooves on both sides. The two ends of the tensioning roller 43 slide in the grooves, and a tensioning spring 49 is installed between the top of the groove and the tensioning roller 43.

[0029] Working principle: In use, the device involves installing the entire roll of test paper onto the paper roll release frame 2, then passing the end of the paper strip sequentially through two limiting rollers 726, under the pressure roller 724, then through the top of the feed positioning roller 42, and then through the tension roller 43 from below, passing between the first rotating roller 45 and the second rotating roller 46, and finally mounting it on the paper roll turner 46 on the paper roll take-up frame 5. At this point, the entire assembly is as follows: Figure 2 The state shown; The specimen is then fixed on the specimen platform 3 and its height is adjusted so that the specimen is close to the pressure roller 724. Then, the electric telescopic rod 75 is retracted by the power module 6, so that the height of the pressure roller 724 decreases until the pressure roller 724 contacts the specimen. At this time, the pressure sensor 725 displays the pressure value. Then, the electric telescopic rod 75 is slowly extended, so that the pressure roller 724 moves upward until the pressure sensor 725 displays a value of zero. At this time, the pressure roller 724 and the specimen are in a "contact without squeezing" state, and the specimen installation is completed. By starting the power motor 44, the power motor 44 drives the first roller 45 to rotate. The first roller 45 drives the second roller 46 to rotate through the transmission gear 48, so that the first roller 45 and the second roller 46 are clamped to the paper tape through the silicone anti-slip sleeves on their surfaces, thereby pulling the paper tape to move at a constant speed. Meanwhile, the second roller 46 drives the drive shaft 54 ​​to rotate via the distribution belt 8. The drive shaft 54 ​​drives the take-up shaft 53 to rotate via the power gear 55. The take-up shaft 53 drives the paper roll head 56 to rotate via the friction rubber pad 57 on the chuck 52, thereby winding up the tested paper tape. In this process, since the two power gears 55 installed at the ends of the drive shaft 54 ​​and the take-up shaft 53 have a large transmission ratio, the linear velocity of the paper roll head 56 in the initial state is greater than the linear velocity of the paper tape, thus ensuring that the paper tape can be effectively wound up. Furthermore, the friction rubber pad 57 and the paper roll head 56 are driven by friction, which allows slippage between the paper roll head 56 and the take-up shaft 53. The friction force can be changed by adjusting the nut at the end of the paper roll shaft 53, thereby ensuring that the paper tape can be tightened without being torn. This is suitable for paper tapes with low strength and low coefficient of friction. During actual testing, the appropriate test mode can be selected according to the test requirements, including constant voltage mode, variable voltage mode and point contact mode. In constant voltage mode, the electromagnet 73 is started by the power module 6, and the current modulator in the power module 6 is used to change the current magnitude. At this time, the magnetic force of the electromagnet 73 gradually increases, and the electromagnet 73 forms a magnetic attraction force on the permanent magnet 76, which makes the permanent magnet 76 tend to move downward, thereby compressing the memory spring 74. At the same time, the pressure roller 724 is squeezed against the test piece. At this time, the value of the pressure sensor 725 increases. When the value of the pressure sensor 725 increases to the preset value, the current constant current magnitude is maintained. At this time, the pressure roller presses the paper tape onto the test piece with the preset pressure value to carry out continuous friction test. In the variable pressure mode, the frequency and amplitude of the current are adjusted by the current modulator to make the current change periodically within a preset threshold range. At the same time, the frequency determines the duration of the period, so that the downward pressure of the pressure roller 724 increases and decreases periodically, thereby realizing the continuous variable pressure test of the specimen. In point-touch mode, the current is adjusted to a preset value by the current modulator, at which point the static pressure of the pressure roller 724 on the specimen is constant. Then, the current direction is changed periodically by the current modulator and the H-bridge module. Due to the change in current direction, the magnetic poles of the electromagnet 73 change. Therefore, when the electromagnet 73 is close to the permanent magnet 76 and its magnetic properties are opposite, they attract each other, causing the pressure roller 724 to press the paper tape down. When the electromagnet 73 is close to the permanent magnet 76 and its magnetic properties are the same, they repel each other, causing the permanent magnet 76 to be lifted up. The permanent magnet 76 is in a magnetic levitation state. At this time, the paper tape does not contact the specimen. Through periodic adjustment, the paper tape contacts the specimen in a point-touch manner to perform friction testing. In the above process, as the pressure roller 724 moves up and down, the tension roller 43 automatically moves down under the action of gravity and the tension spring 49 to tighten the paper tape. This allows for arbitrary adjustment of the pressure value of the test object within the tolerance range of the paper tape throughout the entire testing process. Furthermore, the amplitude and speed of pressure changes can be adjusted arbitrarily during the test. It also offers the two modes of continuous testing and point contact testing found in traditional paper abrasion testing machines, making it more versatile in practical testing applications. Moreover, it eliminates the need for non-standard customization when testing some special materials and scenarios, allowing for arbitrary adjustments.

[0030] Example 2: The drive roller includes a threaded roller 411 rotatably mounted on the top of the drive frame 41, the limiting part includes a threaded paper roll groove 412 formed on the outer wall of the threaded roller 411, the anti-slip part includes a silicone pad fixedly pasted to the bottom of the threaded paper roll groove 412, the drive belt 47 is installed between the power motor 44 and the threaded roller 411, and the transfer belt 8 is installed between the threaded roller 411 and the drive shaft 54.

[0031] Working principle; In this embodiment, a different drive roller scheme is provided compared to Embodiment 1. In this embodiment, the drive roller adopts a threaded roller form, such as... Figure 8-9 As shown, a threaded paper roll groove 412 with the same width as the paper strip is opened on the surface, and a silicone pad is pasted inside the threaded paper roll groove 412. When the paper strip passes through the threaded roller 411, it is wound in the threaded paper roll groove 412. At this time, one end of the paper strip is tightened by the tension roller 43, and the other end of the paper strip is wound on the surface of the paper roll head 56. When the power motor 44 is started, the linear speed of the paper roll head 56 is greater than the linear speed of the paper strip, so that the paper strip is tightened and the paper strip is pressed tightly against the surface of the silicone pad. At this time, as the threaded roller 411 rotates, one end of the threaded roller 411 continuously winds up the paper strip, and the other end continuously releases the paper strip, thereby achieving the traction of the paper strip at a constant linear speed. Compared with the solution of Embodiment 1, this solution is more convenient for paper strip installation and has a lower risk of paper strip deviation. It is suitable for paper strips with high strength and high coefficient of friction.

[0032] Example 3: The present invention provides, as follows Figures 1 to 11 The method of using an intelligent paper tape abrasion tester, as shown, includes the following steps: S1. Select the corresponding test mode through power module 6 according to the test method, including constant voltage mode, transformer mode and touch mode; S2. After loading the sample, the pressure roller 724 is moved down by the power module 6 so that the test paper contacts the sample and the pressure sensor 725 reads zero. S3. Adjust the current modulator and H-bridge module according to the test pressure range; In constant voltage mode, electromagnet 73 is adjusted to the target constant magnetic force; In transformer mode, the amplitude and frequency of the current are adjusted to achieve periodic changes in the magnetic force of electromagnet 73 within the threshold range; In touch mode, electromagnet 73 is adjusted to the target constant magnetic force, and then the magnetic poles are periodically changed through the H-bridge module.

[0033] Working principle: In this method, the power module 6 integrates a current modulator and an H-bridge module. The current modulator can adjust the current value and change the current periodically. At the same time, the H-bridge module can also periodically adjust the current direction. In actual use, different pressures and pressing methods are provided to the pressure roller 724 for different test modes to meet the requirements of different industries, materials and test intensity.

[0034] Example 4: This example provides a practical application case of using the intelligent paper tape abrasion tester designed in this solution for umbrella fabric testing. In this example, the actual purpose is to test an umbrella material used for outdoor sun and rain protection. The material is made of composite polyester material with high strength. The outer layer is coated with a waterproof layer, followed by a scratch-resistant and abrasion-resistant coating, and the inner layer is coated with a waterproof layer. Now I need to test it using the paper tape abrasion tester. My solution is to first test the abrasion resistance of the main fabric material using a traditional constant pressure method, then test the inner waterproof layer using a variable pressure method, and finally test the performance of the outer scratch-resistant and abrasion-resistant coating using a periodic point pressure method. The experimental equipment selected in this plan includes: The intelligent paper tape abrasion tester supports constant pressure, variable pressure, and intermittent point pressure modes; the pressure range is 0~500g; and the lifting and lowering cycle is adjustable from 0.5 to 5s. RCA standard abrasion-resistant paper tape (width 17.46mm, thickness 0.08mm, length 200m). Magnifying glass (10x); Spray tester; Electronic balance (accuracy 0.001g); Option 1: Constant pressure mode test of the basic abrasion resistance of the main fabric material The core objective is to verify the tensile and abrasion resistance of the composite polyester substrate, which is the foundation for the durability of the umbrella surface. Test parameters include: pressure sensor 725 displaying a test pressure of 275g (RCA standard pressure); paper tape linear speed of 10cm / s; Termination conditions: A) 200m of paper tape is exhausted; B) The sample shows obvious damage. The test will stop when either condition is met. During the test, the paper tape will be checked every 50m of tape consumed (since the paper tape is driven at a constant speed, this can be achieved by timing the motor at 44 degrees Celsius, with an error within 0.1m). Test results: After 200m of paper tape was exhausted, the fabric surface showed only slight wear when observed under a microscope. The wear level was assessed by six observers and found to meet the industry standard FZ / T43024-2013 "Umbrella Fabrics". Option 2: Test the wear resistance stability of the inner waterproof layer using the variable pressure mode. Core objective: To verify the integrity of the inner waterproof layer under different pressure frictions. Since the umbrella surface will lose its rainproof function once the waterproof layer is damaged, it is necessary to simulate pressure changes under different usage scenarios. The test parameters are: pressure variation range (55g~275g stepless pressure change cycle); pressure switching cycle is 5s. Termination conditions: A. Three rolls of test paper are consumed consecutively; B. Waterproofing layer failure is detected. The test results showed that during the test, the test piece was removed every 100m of paper tape consumed and sprayed through a spray tester. In the end, three rolls of test paper were exhausted, but the umbrella waterproof layer did not leak and only showed slight wear. It was evaluated that it met the industry standard GB / T13775-2019 "Textiles - Determination of Abrasion Resistance - Flat Abrasion Method". Option 3: Periodic pressure testing of the outer scratch-resistant and wear-resistant coating performance. Core objective: To simulate the scenario of outdoor umbrella canopy being "scratched" by hard objects such as tree branches and pebbles, and to verify the impact and wear resistance of the outer anti-scratch coating. This is different from continuous friction, and intermittent point pressure is closer to the actual working condition of "scratching". The test parameters include: a test pressure of 350g (higher than the standard pressure, simulating the concentrated pressure of a hard object scraping); a lifting and lowering cycle of 2s / cycle (lifting for 0.5s and pressing down for 1.5s); and a friction stroke of 10mm (short stroke, focusing on localized wear). Termination conditions: A. One roll of paper tape is used up; B. The outer scratch-resistant and abrasion-resistant layer is worn down, exposing the surface waterproof layer. Test results: The entire roll of paper tape was completely consumed. During the test, the specimen was removed every 50m and the surface scratch-resistant and abrasion-resistant layer was observed under a microscope. The final result was that the scratch-resistant and abrasion-resistant layer surface only had slight scratches after the abrasion resistance test, with no exposed substrate. Finally, through observation under a high-precision optical microscope, the initial scratch-resistant and abrasion-resistant layer was 25μm, and after the test it was 21μm. Only 4μm was consumed during the test, which is a high-quality abrasion-resistant coating. Ultimately, it was determined that the umbrella material conforms to the industry standard GB / T23147-2018 "Umbrellas"; In summary, this device tests the main material, waterproof layer, and scratch-resistant and abrasion-resistant layer of the umbrella surface through three different testing modes. The final test results show that the umbrella surface material meets industry standards. Furthermore, to avoid errors, the abrasion resistance test was conducted under the same working conditions using a traditional abrasion resistance testing machine. The error between the two test results was less than the maximum allowable error range of 0.5%. Therefore, this intelligent paper tape abrasion resistance testing machine has abrasion resistance testing functions under multiple working conditions and preset test effects.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent paper tape abrasion resistance testing machine, characterized in that, include: Test bench (1); Paper roll release frame (2) is fixedly installed at one end of the test bench (1); Paper roller winding frame (5) is fixedly installed at the other end of the test bench (1); The paper belt drive unit (4) is located between the paper roll release frame (2) and the paper roll take-up frame (5), and has two closely attached drive rollers on it for pulling the paper belt to move. The test piece stage (3) is located between the paper roll release frame (2) and the paper belt drive (4); The power supply module (6) is fixedly installed on the test bench (1), and a current modulator and an H-bridge module are integrated inside it; A pressure seat (7) is fixedly installed on the back of the test piece stage (3), and a paper pressing component (72) is slidably installed on the pressure seat (7). An electromagnet (73) is fixedly installed on the inner bottom of the pressure seat (7), and a permanent magnet (76) connected to the paper pressing component (72) is movably installed on the top of the electromagnet (73). The electromagnet (73) is connected to the power module (6) through the current modulator and H-bridge module, thereby changing the magnetic force and magnetic poles of the electromagnet (73), so that the paper pressing part (72) is in a preset state on the test bench (1).

2. The intelligent paper tape abrasion resistance testing machine according to claim 1, characterized in that, The paper pressing component (72) includes a carrier frame (721) slidably disposed on the pressing base (7). A connecting frame (722) is fixedly installed on the outer surface of the carrier frame (721). A connecting column (723) is movably disposed at the bottom of the connecting frame (722). A pressure sensor (725) is disposed at the top of the connecting column (723). A pressure roller (724) is detachably installed at the bottom end of the connecting column (723). Limit rollers (726) are installed on both sides of the connecting column (723).

3. The intelligent paper tape abrasion resistance testing machine according to claim 2, characterized in that, An electric telescopic rod (75) is fixedly installed at the inner end of the carrier (721). A support plate (77) is fixedly installed between the electric telescopic rod (75) and the permanent magnet (76). Slide rails (78) are fixedly installed on both sides of the inner wall of the pressure seat (7). The two ends of the support plate (77) are slidably arranged on the slide rails (78), and a memory spring (74) for supporting the support plate (77) is movably sleeved at the bottom end of the slide rails (78).

4. The intelligent paper tape abrasion resistance testing machine according to claim 3, characterized in that, The paper tape drive unit (4) includes a drive frame (41), a power motor (44) is installed at the bottom of the drive frame (41), a drive belt (47) is installed between the power motor (44) and the drive roller, a split belt (8) is installed between the drive roller and the paper roller winding frame (5), and an anti-slip part and a limiting part are provided on the drive roller.

5. The intelligent paper tape abrasion resistance testing machine according to claim 4, characterized in that, A take-up shaft (53) is rotatably mounted on the paper roller take-up frame (5). A paper winding head (56) is movably sleeved on the take-up shaft (53). A friction rubber pad (57) for transmitting power is installed between the paper winding head (56) and the take-up shaft (53). A drive shaft (54) is rotatably mounted on one side of the take-up shaft (53). A meshing power gear (55) is fixedly sleeved on the drive shaft (54) and the take-up shaft (53).

6. The intelligent paper tape abrasion resistance testing machine according to claim 5, characterized in that, The drive rollers include a first roller (45) and a second roller (46) rotatably disposed on both sides of the top of the drive frame (41). The anti-slip part includes a silicone anti-slip sleeve fixedly disposed on the outer wall of the first roller (45) and the second roller (46). The limiting part includes a positioning clamp (410) movably disposed on the outer wall of the second roller (46). The ends of the two sets of drive rollers are respectively equipped with mutually meshing transmission gears (48). The drive belt (47) is installed between the power motor (44) and the first roller (45). The two ends of the distribution belt (8) are installed between the second roller (46) and the transmission shaft (54).

7. The intelligent paper tape abrasion resistance testing machine according to claim 5, characterized in that, The drive roller includes a threaded roller (411) rotatably mounted on the top of the drive frame (41), the limiting part includes a threaded paper roll groove (412) formed on the outer wall of the threaded roller (411), the anti-slip part includes a silicone pad fixedly pasted to the bottom of the threaded paper roll groove (412), the drive belt (47) is installed between the power motor (44) and the threaded roller (411), and the transfer belt (8) is installed between the threaded roller (411) and the drive shaft (54).

8. The intelligent paper tape abrasion resistance testing machine according to claim 5, characterized in that, The paper roll take-up frame (5) includes a support arm (51) fixed on the test bench (1), the take-up shaft (53) is rotatably connected in the support arm (51), the outer wall of the take-up shaft (53) is provided with two clamps (52), the paper roll head (56) is provided between the two clamps (52), and the friction rubber pads (57) are in two sets, respectively fixedly provided on the inner side of the two clamps (52), and the outer end of the take-up shaft (53) is threaded with a locking nut.

9. The intelligent paper tape abrasion resistance testing machine according to claim 4, characterized in that, The drive frame (41) is equipped with a feeding positioning roller (42) and a tensioning roller (43). The feeding positioning roller (42) is rotatably mounted on the drive frame (41). The drive frame (41) has grooves on both sides. The two ends of the tensioning roller (43) slide in the grooves, and a tensioning spring (49) is installed between the inner top of the groove and the tensioning roller (43).

10. A method of using an intelligent paper tape abrasion tester, based on the intelligent paper tape abrasion tester according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Select the corresponding test mode through the power supply module (6) according to the test method, including constant voltage mode, transformer mode and point contact mode; S2. After loading the sample, the pressure roller (724) is controlled to move down by the power module (6) so that the test paper contacts the sample and the pressure sensor (725) reads zero. S3. Adjust the current modulator and H-bridge module according to the test pressure range; In constant voltage mode, the electromagnet (73) is adjusted to the target constant magnetic force; In transformer mode, the amplitude and frequency of the current are adjusted to achieve periodic changes in the magnetic force of the electromagnet (73) within the threshold range; In touch mode, the electromagnet (73) is adjusted to the target constant magnetic force and then the magnetic poles are periodically changed through the H-bridge module.

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