A multi-directional testing device for tensile properties of textile fabrics

Abstract

The invention relates to a multi-directional testing device for tensile properties of textile fabrics applied to the technical field of testing devices. The device comprises a clamp symmetrically arranged up and down, and the clamp realizes multi-directional stretching through an electromagnetic driving mechanism; the clamp adopts a novel winding roller-spike structure and a segmented adjusting wheel-locking frame structure to realize rapid clamping and disassembly of a sample; the electromagnetic driving mechanism adopts a permanent magnet-electromagnetic coil structure, cooperates with a weight sheet to provide precise tension, and cooperates with a distance sensor and an adjusting rod to realize constant tension control; a laser projection ruler provides precise deformation measurement; a controller realizes automatic control of the entire test process, can apply tension to textile fabrics in multiple directions, and has comprehensive evaluation; the clamping is quick and the test is efficient; the tension adjustment is precise; the deformation measurement is precise, and the performance evaluation is accurate; the operation is intelligent and flexible; the device is suitable for various types of textile fabrics, has strong versatility, and can improve the efficiency, precision and reliability of tensile property testing of textile fabrics.

Description

Technical Field

[0001] The present invention relates to a multi-directional testing device for the tensile properties of textile fabrics, and in particular to a multi-directional testing device for the tensile properties of textile fabrics applied in the technical field of testing devices. Background Art

[0002] The tensile properties of textile fabrics are an important indicator for evaluating fabric quality and performance. At present, the test of the tensile properties of textile fabrics mainly adopts the unidirectional tensile test method, that is, applying tension to the fabric along the warp or weft direction to test its mechanical performance parameters. However, in actual use, textile fabrics are often subjected to tensile forces in multiple directions. The unidirectional tensile test is difficult to fully evaluate the actual mechanical properties of the fabric. Therefore, it is of great significance to develop a device that can realize the multi-directional tensile performance test of textile fabrics.

[0003] Chinese invention patent CN115979819B discloses a stretching device with IPC classification number G01N for testing the elasticity of textile fabrics. The device is equipped with through holes and clamping blocks to clamp and fix the fabric. The clamping plate is driven by an electric telescopic rod to apply tension to the fabric. However, the device can only perform unidirectional tensile testing and cannot evaluate the multi-directional tensile performance of the fabric. In addition, the fixing and clamping of the fabric need to be completed manually, resulting in low testing efficiency.

[0004] Chinese invention patent CN111751205B discloses a random testing device for the lateral tensile properties of fabrics used in textile processing. The device is driven by a single motor and uses telescopic plates and clamps to clamp and stretch fabrics of different thicknesses, thereby testing the lateral tensile properties of the fabrics. However, the stretching direction of the device is limited to a single lateral direction and cannot achieve 360° multi-directional stretching testing. At the same time, the device has a complex structure, numerous components, and high assembly and maintenance costs.

[0005] In summary, most of the existing textile fabric tensile performance testing devices use unidirectional tensile testing methods, which cannot comprehensively evaluate the multidirectional mechanical properties of the fabric. In addition, the testing efficiency is low, the device structure is complex, and the use and maintenance costs are high. Therefore, designing a textile fabric tensile performance multidirectional testing device with diversified testing methods, automated operation, simple and efficient structure is of great significance to improving the level of textile fabric performance testing and quality assessment. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides a multi-directional testing device for the tensile properties of textile fabrics, which aims to realize the automated testing of the tensile properties of textile fabrics in multiple directions, improve the testing efficiency and the comprehensiveness of the evaluation.

[0007] To solve the above problems, the present invention provides a multi-directional testing device for tensile properties of textile fabrics, comprising a controller and an upper clamp and a lower clamp symmetrically arranged above and below, the textile fabric being fixedly connected between the upper clamp and the lower clamp, the bottom end of the lower clamp being fixedly connected to a plurality of weight pieces, the bottom end of the weight piece located at the bottom end of the plurality of weight pieces being fixedly connected to a permanent magnet, a coil fixing frame being provided on the lower side of the permanent magnet, the top end of the coil fixing frame being fixedly connected to a distance sensor, and the bottom end of the electromagnetic coil group being fixedly connected to the controller, the bottom end of the electromagnetic coil group being fixedly connected to an adjusting rod, the outer end of the adjusting rod being threadedly connected to a bracket, the adjusting rod passing through the bracket, and the outer end of the penetrating portion being slidably connected to a driven pulley, the outer end of the adjusting rod being provided with a plurality of sliding grooves parallel to the axis of the adjusting rod, and the sliding grooves being slidably connected to the inner wall of the driven pulley, the outer end of the driven pulley being cooperated with a synchronous belt, the end of the synchronous belt away from the driven pulley being cooperated with a driving pulley, and the bottom end of the bracket being fixedly connected to a motor at a corresponding position of the driving pulley.

[0008] As a further improvement of the present application, the motor is electrically connected to the controller, the motor power shaft is fixedly connected to the driving pulley, and the upper clamp and the lower clamp both include a clamping bracket.

[0009] As a further improvement of the present application, the clamping bracket is a U-shaped structure, and the squeezing roller and the winding roller are rotatably connected inside the U-shaped structure, and a plurality of spikes are fixedly connected to the outer end of the winding roller, and the plurality of spikes are distributed in a circular array around the axis of the winding roller.

[0010] As a further improvement of the present application, the height of the multiple spikes is equal to the thickness of the textile fabric, the squeezing roller and the winding roller both pass through the clamping bracket, and the penetrating parts are fixedly connected to the clamping adjustment wheel.

[0011] As another improvement of the present application, the outer ends of the two clamping adjustment wheels located on the same side of the extrusion roller and the winding roller are clamped with the same locking frame, and the clamping adjustment wheel has a hexagonal prism structure at one end close to the clamping bracket and a cylindrical structure at the other end away from the clamping bracket, and the diameter of the circumscribed circle of the hexagonal prism is smaller than the diameter of the cylinder.

[0012] As another improved supplement of the present application, a locking groove and a rotating groove matching the outer end of the clamping adjustment wheel are opened in the locking frame, and the locking groove is slidingly connected to the outer end of the clamping adjustment wheel prism for locking the clamping adjustment wheel.

[0013] As another improved supplement of the present application, the diameter of the rotating groove is larger than the diameter of the circumscribed circle of the hexagonal prism on the clamping adjustment wheel, so that the clamping adjustment wheel can rotate in the rotating groove, and the clamping bracket is fixedly connected to the end away from the winding roller with a screw.

[0014] As another improvement of the present application, the screw on the clamping bracket on the upper clamp is fixedly connected to the top of the bracket, the screw on the clamping bracket on the lower clamp is used to fix the weight plate and the permanent magnet, and a laser projection ruler is fixedly connected to the bracket, and the laser projection ruler is electrically connected to the controller.

[0015] The laser projection ruler is set vertically and has multiple scales on it. The scales can project the laser onto the textile fabric. The coil fixing frame is an arc structure, and the center of the circle is located at the center point of the upper clamp and the bracket.

[0016] The method of using the method includes the following steps:

[0017] S1. Place the ends of the cut textile fabric in contact with the winding rollers of the upper and lower clamps, respectively. Rotate the clamping adjustment wheel to pass the textile fabric through the squeezing roller and the winding roller. Use the spikes on the outer end of the winding roller to penetrate into the interior of the textile fabric and secure it. Then, lock the clamping adjustment wheel with a locking frame to quickly and firmly secure the textile fabric.

[0018] S2. Select an appropriate number of weights and fix them to the bottom of the lower fixture. Use the gravity of the weights to apply vertical tension to the textile fabric to perform stretching and rebound tests.

[0019] S3, controlling the power state of each coil in the electromagnetic coil assembly, changing the magnetic field distribution, driving the permanent magnet to swing at any angle above the coil fixing frame, and driving the textile fabric to perform multi-directional tensile testing at corresponding angles;

[0020] S4, the distance sensor monitors the change in the distance between the permanent magnet and the coil holder. When the change reaches the set value, the adjustment rod is controlled to move up and down to compensate for the displacement of the permanent magnet, keep the distance constant, and achieve stable multi-directional pulling force;

[0021] S5. Use a laser projection ruler to project the laser onto the surface of the textile fabric, analyze the displacement of the projection point, and calculate the tensile deformation of the textile fabric by the controller in combination with the movement distance of the adjustment rod to accurately evaluate the tensile properties;

[0022] S6. Repeat the above steps according to the test requirements to obtain the tensile performance parameters of the textile fabric under different conditions and complete a comprehensive tensile performance test.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. Diverse testing methods and comprehensive evaluation. The device adopts a symmetrical fixture structure arranged vertically and an electromagnetic drive mechanism composed of permanent magnets and electromagnetic coils. It can apply tension in the vertical direction to achieve conventional tensile and rebound performance tests. At the same time, by controlling the power state of the electromagnetic coil, the permanent magnet can be driven to drive the fixture and sample to swing at any angle to achieve multi-directional tensile testing. This structure can comprehensively and systematically evaluate the tensile properties of textile fabrics in all directions, providing more complete and reliable data support for textile performance optimization and product design.

[0025] 2. Fast and convenient clamping, high test efficiency. A U-shaped clamping bracket is used with a squeezing roller and a winding roller with spikes. The specimen is wrapped around the rotating winding roller and fixed with spikes. Combined with the segmented clamping adjustment wheel and the locking slot / rotating slot locking frame, the specimen can be quickly clamped and removed. Compared with traditional flat-plate fixtures, the clamping operation of this device is simpler and faster, and the fixing strength is greater, which can effectively shorten the test preparation time and improve the test efficiency.

[0026] 3. Precise tension adjustment and stable and reliable testing. Weights are used to apply uniform and accurate initial tension to the specimen, ensuring consistent test conditions. During the multi-directional tensile test, the distance sensor integrated in the coil holder monitors the distance change between the permanent magnet and the coil holder in real time. When the distance change reaches the set threshold, the controller activates the motor on the adjustment rod, driving the screw nut mechanism to move the adjustment rod up and down, thereby compensating for the vertical displacement of the permanent magnet, keeping the permanent magnet in the optimal working position and ensuring constant tension. Compared with fixed or spring-type force-applying devices, this mechanism can accurately adjust the tension over a wider range and maintain stable tension even during dynamically changing multi-directional stretching processes, improving the reliability and repeatability of test results.

[0027] 4. Accurate deformation measurement and performance evaluation. A high-precision laser projection ruler is used to perform non-contact measurement of sample deformation, avoiding the impact that contact displacement sensors may have on the sample. By projecting a series of laser scale lines onto the sample surface, the elongation of each part of the sample can be accurately measured. Combined with the displacement parameters of the screw-nut mechanism, the controller automatically calculates the tensile strain and evaluates the tensile performance index. Compared with the traditional manual reading method, this measurement method is fully automated, has high measurement accuracy, and can more accurately and comprehensively evaluate the tensile properties of textile fabrics.

[0028] 5. High versatility and wide range of applications. The testing device and method provided by the present invention are applicable to all types of textile fabrics, including woven, knitted, non-woven fabrics, etc., as well as fabrics of different materials (cotton, linen, wool, silk, chemical fiber, etc.) and different structures (plain, twill, satin, jacquard, etc.). They have high versatility. In addition, the device adopts a standardized design, and various technical parameters (such as fixture size, force range, measurement accuracy, etc.) can be flexibly configured according to the characteristics of the object to be tested and the test standards. It has a wide range of applications. At the same time, the testing device of the present invention has a compact structure and occupies a small area. It can be highly integrated into a multifunctional textile material physical property analyzer, and can also be used as an independent test unit for production process control and quality inspection of textile fabrics, thereby promoting the intelligent development of the textile industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the overall structure diagram of this application;

[0030] Figure 2 This is an overall exploded view of this application;

[0031] Figure 3 Local explosion for this application Figure 1 ;

[0032] Figure 4 Local explosion for this application Figure 2 ;

[0033] Figure 5 Local explosion for this application Figure 3 ;

[0034] Figure 6 This is the front view of the application;

[0035] Figure 7 For this application Figure 6 Middle AA section view;

[0036] Figure 8 For this application Figure 7 Middle BB section;

[0037] Figure 9 For this application Figure 7 Enlarged view of point C in the middle;

[0038] Figure 10 This is the appearance structure diagram of this application.

[0039] Description of the numbers in the figure:

[0040] 1. Upper fixture; 2. Lower fixture; 3. Textile fabric; 4. Weight plate; 5. Permanent magnet; 6. Coil fixing frame; 7. Electromagnetic coil assembly; 8. Adjustment rod; 9. Bracket; 10. Driven pulley; 11. Synchronous belt; 12. Driving pulley; 13. Motor; 14. Clamping bracket; 15. Squeeze roller; 16. Winding roller; 17. Spike; 18. Clamping adjustment wheel; 19. Locking frame; 20. Lock slot; 21. Rotation slot; 22. Laser projection ruler. DETAILED DESCRIPTION

[0041] The following describes three implementation methods of the present application in detail with reference to the accompanying drawings.

[0042] Example 1

[0043] like Figures 1 to 10 As shown, the multi-directional testing device for the tensile properties of textile fabrics includes a controller and an upper clamp 1 and a lower clamp 2 symmetrically arranged above and below. The textile fabric 3 to be tested is fixedly connected between the upper clamp 1 and the lower clamp 2. A plurality of weights 4 for providing tensile force are fixedly connected to the bottom end of the lower clamp 2. A permanent magnet 5 is fixedly connected to the bottom end of the weight 4 located at the bottom end among the plurality of weights 4.

[0044] A coil fixing frame 6 is provided below the permanent magnet 5. The coil fixing frame 6 adopts an arc structure to adapt to the swing of the permanent magnet 5. The center of the circle is located at the center point of the fixed connection between the upper clamp 1 and the bracket 9. The top of the coil fixing frame 6 is fixedly connected to a distance sensor for real-time monitoring of the distance between the permanent magnet 5 and the coil fixing frame 6. The bottom end of the coil fixing frame 6 is fixedly connected to an electromagnetic coil group 7. The electromagnetic coil group 7 is electrically connected to the controller. The controller can adjust the power-on state of each coil to change the magnetic field distribution of the electromagnetic coil group 7, thereby controlling the movement of the permanent magnet 5.

[0045] The bottom end of the electromagnetic coil group 7 is fixedly connected to an adjusting rod 8, which can move up and down under the drive of the electromagnetic coil group 7. The outer end of the adjusting rod 8 is connected to a bracket 9 through a thread. The adjusting rod 8 passes through the bracket 9, and the appearance of the penetrating part is slidingly connected to a driven pulley 10. The outer end of the adjusting rod 8 is provided with a plurality of slide grooves parallel to its axis. These slide grooves are slidingly connected to the inner wall of the driven pulley 10, so that the driven pulley 10 can drive the adjusting rod 8 to rotate. The outer end of the driven pulley 10 is connected to the driving pulley 12 through a synchronous belt 11. The driving pulley 12 is driven by a motor 13 fixed to the bottom end of the bracket 9. The motor 13 is electrically connected to the controller and can be precisely controlled by the controller.

[0046] Both the upper clamp 1 and the lower clamp 2 include a clamping bracket 14 for stably clamping the two ends of the textile fabric 3. The clamping bracket 14 on the upper clamp 1 is fixedly connected to the top of the bracket 9 through a screw, and the clamping bracket 14 on the lower clamp 2 is fixedly connected to the weight plate 4 and the permanent magnet 5 through a screw.

[0047] A laser projection ruler 22 is also fixedly connected to the bracket 9. The laser projection ruler 22 is electrically connected to the controller. The laser projection ruler 22 is vertically arranged and has multiple scales on it. It can project laser onto the textile fabric 3 for accurately measuring the tensile deformation of the textile fabric 3.

[0048] During operation, the two ends of the textile fabric 3 to be tested are respectively fixed on the upper clamp 1 and the lower clamp 2, and then an appropriate number of weights 4 are installed on the lower clamp 2. The gravity of the weights 4 is used to apply an initial vertical pulling force to the textile fabric 3. Then, the controller adjusts the power supply state of each coil in the electromagnetic coil group 7 so that the permanent magnet 5 swings to a specified angle around the center of the coil fixing frame 6 under the action of the electromagnetic force, driving the lower clamp 2 and the textile fabric 3 to swing together to achieve a tensile force at any angle. During the stretching process, the distance sensor measures the distance change between the permanent magnet 5 and the coil fixing frame 6. When the distance change reaches the set value, the controller starts the motor 13 and drives the adjusting rod 8 up and down through the synchronous belt 11 to compensate for the distance change caused by the swing of the permanent magnet 5, thereby keeping the tension constant. At the same time, the laser projection ruler 22 projects the laser onto the scale on the surface of the textile fabric 3. By analyzing the displacement of the projection point and combining the moving distance of the adjusting rod 8, the controller calculates the tensile deformation of the textile fabric 3.

[0049] Compared with the prior art, the beneficial effects of this embodiment are:

[0050] By driving the lower fixture 2 to swing with a controllable electromagnetic structure, the textile fabric 3 can be stretched at any angle, which enriches the stretching test methods and improves the comprehensiveness of the test.

[0051] The laser projection ruler 22 is used to directly measure the deformation of the textile fabric, and combined with the displacement data of the adjustment rod 8, the stretching amount can be accurately detected, thereby improving the measurement accuracy;

[0052] The automation of the test process is realized and the test efficiency is improved. The device has a high degree of automation and can improve the accuracy, efficiency and applicability of tensile performance testing of textile fabrics, and has good application prospects.

[0053] Example 2

[0054] like Figures 1 to 10As shown, on the basis of Example 1, a clamping bracket 14 is provided on the upper clamp 1 and the lower clamp 2. The clamping bracket 14 adopts a U-shaped structure. A squeezing roller 15 and a winding roller 16 are rotatably connected within the U-shaped structure of the clamping bracket 14. The squeezing roller 15 and the winding roller 16 both pass through the clamping bracket 14. A plurality of spikes 17 are fixedly connected to the outer end of the winding roller 16. The plurality of spikes 17 are distributed in a circular array around the axis of the winding roller 16. The height of each spike 17 is equal to the thickness of the textile fabric 3 to be tested.

[0055] A clamping adjustment wheel 18 is fixedly connected to the part where the squeezing roller 15 and the winding roller 16 pass through the clamping bracket 14. The outer ends of the two clamping adjustment wheels 18 located on the same side of the squeezing roller 15 and the winding roller 16 are clamped with the same locking frame 19. The end of the clamping adjustment wheel 18 close to the clamping bracket 14 is a hexagonal prism structure, and the end away from the clamping bracket 14 is a cylindrical structure, and the diameter of the circumscribed circle of the hexagonal prism is smaller than the diameter of the cylinder.

[0056] A locking groove 20 and a rotating groove 21 are provided in the locking frame 19, which cooperate with the outer end of the clamping and adjusting wheel 18. The locking groove 20 is slidably connected to the outer end of the prism of the clamping and adjusting wheel 18 and is used to lock the clamping and adjusting wheel 18. The diameter of the rotating groove 21 is larger than the diameter of the circumscribed circle of the hexagonal prism on the clamping and adjusting wheel 18, so that the clamping and adjusting wheel 18 can rotate in the rotating groove 21.

[0057] A screw is fixedly connected to one end of the clamping bracket 14 away from the winding roller 16 , the screw on the upper clamp 1 is fixedly connected to the top of the bracket 9 , and the screw on the lower clamp 2 is used to fix the weight piece 4 and the permanent magnet 5 .

[0058] When using the clamping device, first, one end of the textile fabric 3 to be tested is passed around the squeezing roller 15 and the winding roller 16, so that the textile fabric 3 is close to the surface of the winding roller 16, and then the clamping adjustment wheel 18 is rotated to drive the winding roller 16 to rotate, so that the textile fabric 3 is wound on the winding roller 16. During the winding process, as the winding roller 16 rotates, the spikes 17 at its outer end will penetrate into the interior of the textile fabric 3, increasing the winding friction. When the textile fabric 3 has been wound several times, the spikes 17 have completely penetrated the textile fabric 3. At this time, the textile fabric 3 is firmly fixed on the winding roller 16. Finally, the locking frame 19 is slid so that the locking groove 20 clamps the hexagonal prism part of the clamping adjustment wheel 18, thereby locking the clamping adjustment wheel 18 and completing the clamping and fixation of the textile fabric 3.

[0059] When the textile fabric 3 needs to be replaced, the locking frame 19 is first slid to the rotation groove 21 position so that the clamping adjustment wheel 18 can rotate freely. The clamping adjustment wheel 18 is rotated in the reverse direction to drive the winding roller 16 to reverse, so that the textile fabric 3 is loosened from the winding roller 16. The textile fabric 3 is removed and replaced with a new sample to be tested.

[0060] Compared with the prior art, the textile fabric clamping device of this embodiment has the following beneficial effects:

[0061] The winding roller 16 is combined with the spikes 17, and the spikes 17 penetrate into the interior of the textile fabric 3 to increase the friction force, thereby achieving a firm connection between the textile fabric 3 and the winding roller 16, effectively avoiding the problem of the textile fabric 3 slipping and falling off during the test, and improving the clamping reliability;

[0062] The winding roller 16 is driven to rotate by the clamping adjustment wheel 18, which can quickly wind and release the textile fabric 3, and is locked with the locking groove 20 of the locking frame 19. The operation is simple and convenient, and the clamping efficiency of the textile fabric 3 is improved;

[0063] By utilizing the segmented structure of the clamping adjustment wheel 18 and the lock slot 20 and the rotation slot 21 of the locking frame 19, a quick switch between clamping and loosening is achieved, making the replacement of the textile fabric 3 very convenient and improving the testing efficiency;

[0064] The entire clamping device has a compact structure and is connected to the main body of the testing device through a screw. It is easy to install and disassemble and has strong applicability. It can greatly improve the sample clamping problem in the tensile performance test of textile fabrics.

[0065] The textile fabric clamping device is easy to operate, has firm and reliable clamping, can improve the clamping efficiency and testing accuracy of textile fabric test samples, and has broad application prospects in the testing field of the textile industry.

[0066] Example 3

[0067] like Figures 1 to 10 As shown, based on Examples 1 and 2, the method for using the multi-directional testing device for tensile properties of textile fabrics includes the following steps:

[0068] S1. Cut the textile fabric 3 to be tested according to the test standard, and make the two ends of the cut textile fabric 3 contact the winding rollers 16 of the upper clamp 1 and the lower clamp 2 respectively. By rotating the clamping adjustment wheel 18 fixedly connected to the winding roller 16 on the upper clamp 1 and the lower clamp 2, the textile fabric 3 passes through the squeezing roller 15 and the winding roller 16, and is wound around the outer surface of the winding roller 16 under the rotation of the winding roller 16. During the winding process, the spikes 17 at the outer end of the winding roller 16 will penetrate into the interior of the textile fabric 3, firmly fixing the textile fabric 3 on the winding roller 16. After the winding is completed, slide the locking frame 19 and use the locking groove 20 on the locking frame 19 to lock the clamping adjustment wheel 18 to complete the quick and firm clamping and fixation of the textile fabric 3. Compared with traditional clamps, this clamping method is simpler to operate, faster, and more firmly fixed.

[0069] S2. According to the test requirements, select an appropriate number of weights 4 and fix them to the bottom end of the lower clamp 2. Use the gravity of the weights 4 to apply vertical tension to the textile fabric 3 to perform conventional tensile and rebound performance tests. By replacing weights 4 of different weights, the performance of the textile fabric 3 under different tensions can be tested.

[0070] S3. Control the power-on state of each coil in the electromagnetic coil group 7 to change the magnetic field distribution around the coil fixing frame 6. The electromagnetic force will drive the permanent magnet 5 to swing at any angle above the coil fixing frame 6. The swing of the permanent magnet 5 drives the lower clamp 2 and the textile fabric 3 to swing together, thereby realizing multi-directional tensile testing of the textile fabric 3 at any angle. By adjusting the power-on state of each coil, the swing angle of the permanent magnet 5 can be accurately controlled to realize a full range of tensile testing.

[0071] S4. During the multi-directional stretching test, the distance sensor fixed on the top of the coil fixing frame 6 monitors the distance change between the permanent magnet 5 and the coil fixing frame 6 in real time. When the distance change between the two reaches the set value, the controller starts the motor 13, and drives the adjusting rod 8 up and down through the synchronous belt 11. The adjusting rod 8 is connected to the bracket 9 by a thread. The rotation of the adjusting rod 8 will cause it to move up and down, compensating for the change in the distance between the permanent magnet 5 and the coil fixing frame 6 caused by the swinging of the permanent magnet 5, so that the distance between the two remains constant, thereby providing stable tension during the multi-directional stretching process.

[0072] S5. Use the laser projection ruler 22 to project the laser onto the surface of the textile fabric 3. By analyzing the displacement of the projection point on the surface of the textile fabric 3 and combining it with the movement distance data of the adjustment rod 8, the controller calculates the tensile deformation of the textile fabric 3 and accurately evaluates the tensile properties of the textile fabric 3.

[0073] S6. Repeat steps S2 to S5 according to the test standard requirements to test the tensile properties of textile fabric 3 under different tensions and angles, obtain a series of performance parameters, and complete a comprehensive and systematic tensile performance test of the textile fabric.

[0074] In summary, the multi-directional testing method for the tensile properties of textile fabrics provided in this embodiment fully utilizes the structural characteristics of the device of the present invention. Through a series of automated steps such as simple and fast textile fabric clamping, weighted stretching, electromagnetic force multi-directional stretching, distance feedback constant force stretching, and laser projection deformation measurement, the tensile properties of textile fabrics are comprehensively and systematically tested.

[0075] Compared with existing methods, this test method has the following benefits:

[0076] The winding roller 16 and the spikes 17 are used to quickly and firmly clamp the textile fabric 3, and the locking frame 19 is used to quickly lock the fabric. The clamping operation is simple and fast, and the clamping strength is high, which effectively improves the test efficiency and test accuracy.

[0077] The use of weights 4 can easily adjust the tension and achieve performance testing under different tension conditions. Combined with the electromagnetic drive of the permanent magnet 5, it can be stretched at any angle to achieve a full range of multi-directional tensile testing and comprehensively evaluate the tensile properties of textile fabrics in all directions.

[0078] The introduction of a distance sensor and a displacement compensation mechanism for the adjustment rod 8 allows for real-time adjustment of the distance between the permanent magnet 5 and the coil holder 6 during the multi-directional stretching process, ensuring a constant pulling force and effectively improving the stability of the test process and the accuracy of the test results.

[0079] The deformation of the textile fabric 3 is accurately measured using a laser projection ruler 22, and the tensile deformation is automatically calculated by the controller, with high measurement accuracy, avoiding errors caused by manual measurement;

[0080] The test process is automated by organically combining various test steps such as clamping textile fabrics, applying tension, adjusting angles, controlling constant forces, and measuring deformation, which greatly improves test efficiency and reduces test costs.

[0081] This testing method fully utilizes the technical advantages of the multi-directional testing device for tensile properties of textile fabrics of the present invention, and realizes comprehensive, accurate and efficient testing of the tensile properties of textile fabrics. It is of great significance for the performance evaluation and quality control of textile fabrics, and provides strong technical support for product development and quality improvement in the textile industry.

[0082] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A multi-directional testing device for tensile properties of textile fabrics, characterized by: The invention comprises a controller and an upper clamp (1) and a lower clamp (2) symmetrically arranged in an upper and lower direction, wherein a textile fabric (3) is fixedly connected between the upper clamp (1) and the lower clamp (2), a plurality of weight pieces (4) are fixedly connected to the bottom end of the lower clamp (2), a permanent magnet (5) is fixedly connected to the bottom end of the weight piece (4) located at the bottom end of the plurality of weight pieces (4), a coil fixing frame (6) is provided on the lower side of the permanent magnet (5), a distance sensor is fixedly connected to the top end of the coil fixing frame (6), and an electromagnetic coil group (7) is fixedly connected to the bottom end thereof, the electromagnetic coil group (7) is electrically connected to the controller, and the bottom end of the electromagnetic coil group (7) is fixedly connected to the electromagnetic coil group (7). An adjusting rod (8) is fixedly connected, and a bracket (9) is threadedly connected to the outer end of the adjusting rod (8). The adjusting rod (8) passes through the bracket (9), and the outer end of the passing portion is slidably connected to a driven pulley (10). The outer end of the adjusting rod (8) is provided with a plurality of sliding grooves parallel to the axis of the adjusting rod (8), and the sliding grooves are slidably connected to the inner wall of the driven pulley (10). A synchronous belt (11) is provided at the outer end of the driven pulley (10), and a driving pulley (12) is provided at one end of the synchronous belt (11) away from the driven pulley (10). A motor (13) is fixedly connected to the bottom end of the bracket (9) at a position corresponding to the driving pulley (12).

2. A multi-directional testing device for tensile properties of textile fabrics according to claim 1, characterized in that: The motor (13) is electrically connected to a controller, a power shaft of the motor (13) is fixedly connected to a driving pulley (12), and both the upper clamp (1) and the lower clamp (2) include a clamping bracket (14).

3. A multi-directional testing device for tensile properties of textile fabrics according to claim 2, characterized in that: The clamping bracket (14) is a U-shaped structure, and a squeezing roller (15) and a winding roller (16) are rotatably connected inside the U-shaped structure, and a plurality of spikes (17) are fixedly connected to the outer end of the winding roller (16), and the plurality of spikes (17) are distributed in a circular array around the axis of the winding roller (16).

4. A multi-directional testing device for tensile properties of textile fabrics according to claim 3, characterized in that: The height of the plurality of spikes (17) is equal to the thickness of the textile fabric (3); the squeezing roller (15) and the winding roller (16) both penetrate the clamping bracket (14), and the penetrated portions are fixedly connected to a clamping adjustment wheel (18).

5. A multi-directional testing device for tensile properties of textile fabrics according to claim 3, characterized in that: The outer ends of two clamping adjustment wheels (18) located on the same side of the squeezing roller (15) and the winding roller (16) are clamped with a same locking frame (19); the end of the clamping adjustment wheel (18) close to the clamping bracket (14) is a hexagonal prism structure, and the end away from the clamping bracket (14) is a cylindrical structure, and the diameter of the circumscribed circle of the hexagonal prism is smaller than the diameter of the cylinder.

6. A multi-directional testing device for tensile properties of textile fabrics according to claim 5, characterized in that: The locking frame (19) is provided with a locking groove (20) and a rotation groove (21) which match the outer end of the clamping and adjusting wheel (18). The locking groove (20) is slidably connected to the outer end of the prism of the clamping and adjusting wheel (18) and is used to lock the clamping and adjusting wheel (18).

7. A multi-directional testing device for tensile properties of textile fabrics according to claim 6, characterized in that: The diameter of the rotating groove (21) is larger than the diameter of the circumscribed circle of the hexagonal prism on the clamping and adjusting wheel (18), so that the clamping and adjusting wheel (18) can rotate in the rotating groove (21); and one end of the clamping bracket (14) away from the winding roller (16) is fixedly connected to a screw rod.

8. A multi-directional testing device for tensile properties of textile fabrics according to claim 7, characterized in that: The screw on the clamping bracket (14) on the upper clamp (1) is fixedly connected to the top of the bracket (9), the screw on the clamping bracket (14) on the lower clamp (2) is used to fix the weight sheet (4) and the permanent magnet (5), and the bracket (9) is fixedly connected with a laser projection ruler (22), and the laser projection ruler (22) is electrically connected to the controller.

9. A multi-directional testing device for tensile properties of textile fabrics according to claim 8, characterized in that: The laser projection ruler (22) is arranged vertically, and a plurality of scales are provided on the laser projection ruler (22), and the scales can project laser light onto the textile fabric (3); the coil fixing frame (6) is an arc structure, and the center of the circle is located at the center point of the fixing point of the upper clamp (1) and the bracket (9).

10. A multi-directional testing device for tensile properties of textile fabrics according to claim 9, characterized in that: How to use it The steps include: S1, bringing the two ends of the cut textile fabric (3) into contact with the winding rollers (16) of the upper clamp (1) and the lower clamp (2), respectively, and rotating the clamping adjustment wheel (18) to allow the textile fabric (3) to pass through the squeezing roller (15) and the winding roller (16), and using the spikes (17) at the outer end of the winding roller (16) to penetrate into the interior of the textile fabric (3) to fix it, and then locking the clamping adjustment wheel (18) with a locking frame (19), thereby completing the fast and firm fixation of the textile fabric (3); S2, selecting an appropriate number of weights (4) and fixing them to the bottom end of the lower fixture (2), using the gravity of the weights (4) to apply a vertical pulling force to the textile fabric (3), and performing a stretching and rebound test; S3, controlling the power-on state of each coil in the electromagnetic coil group (7), changing the magnetic field distribution, driving the permanent magnet (5) to swing at any angle above the coil fixing frame (6), and driving the textile fabric (3) to perform a multi-directional tensile test at a corresponding angle; S4, the distance sensor monitors the change in the distance between the permanent magnet (5) and the coil fixing frame (6). When the change reaches a set value, the adjustment rod (8) is controlled to move up and down to compensate for the displacement of the permanent magnet (5), keep the distance constant, and achieve stable multi-directional pulling force; S5, using a laser projection ruler (22) to project laser light onto the surface of the textile fabric (3), analyzing the displacement of the projection point, and combining the movement distance of the adjustment rod (8), the controller calculates the tensile deformation of the textile fabric (3) to accurately evaluate the tensile properties; S6. Repeat the above steps according to the test requirements to obtain the tensile performance parameters of the textile fabric under different conditions and complete a comprehensive tensile performance test.

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