A device and method for rapid detection of the tensile modulus of elasticity of a fabric under load

Abstract

The application discloses a kind of fabric fixed load tensile elastic modulus rapid detection device, including workbench, and lifting platform and rotating ring on workbench, the top surface of lifting platform is provided with lower detection table, the upper detection table is arranged in parallel above lower detection table, a plurality of upper notches are opened in the upper detection table, a plurality of lower notches are opened in the lower detection table, upper clamping assembly is arranged in the upper notch, lower clamping assembly is arranged in the lower notch, vertical pushing assembly for driving upper clamping assembly down is arranged on the upper detection table, and the upper clamping assembly includes upper clamping block, and the lower clamping assembly includes lower clamping block.The application can automatically complete fixed load tensile elastic modulus test in any angle in the range of 0°-90° once sample is loaded, so that the tedious procedures of multiple sample cutting and repeated clamping are saved, and single sample full-angle detection efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of fabric testing equipment technology, and more specifically, to a rapid testing device and method for the tensile modulus of elasticity of fabric under constant load. Background Technology

[0002] The tensile modulus of elasticity of a fabric is a core indicator characterizing the mechanical properties of a fabric. It directly reflects the fabric's resistance to deformation, elastic recovery performance, and dimensional stability, and is an important basis for textile fabric research and development, factory quality inspection, and garment process design.

[0003] Currently, the mainstream method for testing the tensile modulus of fabrics is the uniaxial strip tensile test, which requires pre-cutting multiple rectangular strip samples at different angles, clamping and loading them one by one using a uniaxial tensile testing machine to complete the test. However, this testing method still has shortcomings: Because fabrics are woven from warp and weft yarns, they have significant anisotropic characteristics. The elastic modulus varies significantly under different stretching angles. In order to obtain anisotropic data at all angles, it is usually necessary to cut multiple sets of samples at different angles. However, manual cutting is prone to dimensional errors and angle deviations. Furthermore, the fabric is prone to angle deviations during each clamping process, which reduces the accuracy of the test. Completing a set of full-angle tests requires multiple rounds of sample cutting, clamping, and testing cycles. The operation steps are cumbersome, and a single set of full-angle tests takes a long time. This cannot meet the needs of batch quality inspection, rapid screening on production lines, and other scenarios, and greatly limits the efficiency of the testing work. In conclusion, the current detection device still has shortcomings and needs to be improved. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, the purpose of this invention is to provide a rapid testing device for the tensile modulus of elasticity of fabric under constant load, including a worktable, and a lifting platform and a rotating ring located on the worktable. The lifting platform has a lower inspection platform on its top surface, and an upper inspection platform is arranged parallel to the lower inspection platform above it. The upper inspection platform has multiple upper recesses, and the lower inspection platform has multiple lower recesses. An upper clamping assembly is installed within each of the upper recesses, and a lower clamping assembly is installed within each of the lower recesses. The upper detection platform is equipped with a vertical pushing component for driving the upper clamping component downward. The upper clamping assembly includes an upper clamping block, the side of which is connected to an upper pull plate via a crossbar. The lower clamping assembly includes a lower clamping block, the side of which is connected to a pull-down plate via a connecting post. Both the upper and lower pull plates are equipped with magnet blocks on their sides. A vertical plate is provided on the rotating ring, and an electromagnet is provided on the vertical plate.

[0006] As a preferred technical solution: As described above, in a rapid testing device for the tensile modulus of elasticity of a fabric under constant load, a groove is provided on the top surface of the worktable, and a hydraulic cylinder is installed on the inner wall of the worktable. Both the lifting platform and the rotating ring are located within the groove. The outer circular wall of the rotating ring is connected to the groove wall bearing. A set of guide rods is welded to the bottom surface of the lifting platform. The bottom end of the guide rods penetrates the worktable wall. The piston rod of the hydraulic cylinder penetrates the worktable wall and is bolted to the bottom surface of the lifting platform.

[0007] With the above technical solution, the rotating ring is sleeved around the periphery of the lifting platform, and the inner diameter of the rotating ring is larger than the outer diameter of the lifting platform. In this way, the rotational movement of the rotating ring and the vertical movement of the lifting platform do not interfere with each other.

[0008] As described above, in a rapid detection device for the tensile modulus of elasticity of a fabric under constant load, the upper notch is distributed in a ring on the upper detection platform, the lower notch is distributed in a ring on the lower detection platform, the bottom surface of the upper detection platform is located above the bottom surface of the upper clamping block, and the top surfaces of the lower detection platform and the lower clamping block are flush.

[0009] The upper and lower clamping blocks are divided into two groups, one group of which has movable upper and lower clamping blocks, and the other group has fixed upper and lower clamping blocks.

[0010] With the above technical solution, multiple upper and lower clamping blocks are also arranged in a ring, so that the fabric can be stretched at any specified angle within 0°-90°, and the test results are more comprehensive.

[0011] As described above, a rapid detection device for the tensile modulus of elasticity of a fabric under constant load has a set of first holes and slots through itself on the upper pull plate, and a set of first inserts adapted to the first holes and slots are integrally formed on the top surface of the lower pull plate.

[0012] With the above technical solution, both the first insertion rod and the first slot are set vertically, so that when the pull-down plate moves upward, the first insertion rod can be inserted into the first slot.

[0013] As described above, a rapid detection device for the tensile modulus of elasticity of a fabric under constant load includes a vertical pushing component comprising a fixed box located within an upper recess. A set of vertical rods is welded and fixed to the top of the fixed box, and a spring is sleeved on the vertical rods. Both ends of the spring are welded and fixed to the top wall of the fixed box and the inner wall of the upper recess. The top of the vertical rods passes through the upper detection platform and is welded with an extrusion strip. The extrusion strip is arc-shaped, and both ends of the extrusion strip are beveled.

[0014] Through the above technical solution, the fixing box is a vertically movable structure, which can drive the upper clamping block inside to move vertically, thereby achieving the clamping and loosening of the fabric.

[0015] As described above, in a rapid detection device for the tensile modulus of elasticity of a fabric under constant load, the top of the fixed box is open, and vertical sliding grooves are formed on both sides of the upper recess. First sliders that conform to the vertical sliding grooves protrude from the outer sides of the fixed box. The upper clamping block is located inside the fixing box, and the crossbar on the upper clamping block passes through the side wall of the fixing box.

[0016] The above technical solution ensures that the bottom opening of the fixing box will not be blocked, thus ensuring that the clamping operation of the upper and lower clamping blocks on the fabric is not hindered.

[0017] As described above, in a rapid detection device for the tensile modulus of elasticity of a fabric under constant load, transverse sliding grooves are provided on both sides of the recess, and second sliders that are adapted to the transverse sliding grooves are protruding from both sides of the lower clamping block.

[0018] Through the above technical solution, the transverse sliding groove and the second slider play a guiding role, ensuring that the lower clamping block can only move horizontally within the recess. As described above, in a rapid testing device for the tensile modulus of elasticity of a fabric under constant load, the lower testing platform is disc-shaped, and the upper testing platform is annular. A fixed cylinder is welded and fixed to the inner circle of the lower testing platform, and a collar connected to its bearing is fitted on the outer wall of the fixed cylinder. The top end of the fixed cylinder is fixedly connected to the worktable via a set of connecting plates. A set of symmetrically distributed rotating rods are bolted to the outer circular wall of the collar. A sleeve connected to the bearing of the rotating rod is fitted on the rotating rod, and a fixing strip is welded to one end of the rotating rod.

[0019] Through the above technical solution, the structure of the upper testing platform is designed so that it does not obstruct the center of the fabric. This allows an industrial camera to capture images of the elastic strain at the center of the fabric under tension, thereby calculating the tensile modulus of elasticity of the fabric under constant load.

[0020] As described above, in a rapid detection device for the tensile modulus of elasticity of a fabric under constant load, a set of second holes and slots are provided on the vertical plate, and a set of second inserts adapted to the second holes and slots are integrally formed at the bottom end of the fixing strip.

[0021] With the above technical solution, the second slot and the second insert are set vertically, so that the fixing bar on the vertical plate is a vertically movable structure, and its position in the vertical direction can be freely adjusted.

[0022] A method for rapidly detecting the tensile modulus of elasticity of a fabric under constant load includes the following steps. S1. Lay the circular fabric to be tested flat in the center area of ​​the lower testing platform to complete the sample loading; S2. The lifting platform moves the lower testing platform upward to the clamping working position; S3. The rotating ring drives the electromagnet to rotate to the target test angle. The two upper clamping blocks at the corresponding angle begin to move downward under the drive of the vertical push component, and cooperate with the corresponding lower clamping block to clamp the fabric. S4. When the electromagnet is energized, the load is applied to the preset load and maintained using a force closed-loop control method. The magnetic force generated by the electromagnet and the magnetic block pulls one of the upper and lower clamping blocks to move radially along the fabric. S5. Collect the real strain data of the uniform strain zone in the center of the sample, and calculate and store the tensile elastic modulus of the fabric at the current angle by combining the real-time tensile force value. S6. The electromagnet is de-energized and unloaded, and the upper clamping block moves upward to reset and release the fabric. S7. The rotating ring drives the electromagnet to rotate to the next target test angle. Repeat steps S3-S6 until all preset angles are tested.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects: (1) The present invention is provided with an upper testing platform and a lower testing platform. Multiple clamping blocks are distributed in a ring on the upper and lower testing platforms. The testing angle can be achieved by switching different clamping blocks and adjusting the angle of the electromagnet. In this way, the constant load tensile modulus test can be automatically completed at any angle within the range of 0°-90° with one sample loading. This eliminates the tedious process of cutting multiple samples and repeatedly clamping them. Compared with the traditional strip method, the efficiency of single sample full-angle testing is greatly improved, which is fully suitable for batch quality inspection and rapid screening application scenarios.

[0024] (2) The present invention is equipped with an electromagnet, which stretches the fabric by electromagnetic force. Compared with traditional servo screw and other equipment, the response speed can reach the millisecond level. It can achieve step-by-step rapid loading to the target load, and can also maintain a constant load by dynamic current adjustment. Furthermore, the electromagnet can switch angles synchronously through the rotating ring, thereby realizing continuous detection operations at multiple angles, which is beneficial to improving work efficiency.

[0025] (3) The present invention uses a single circular fabric sample to complete the full-angle elastic modulus test. All angle tests are carried out based on the same sample and the same central reference, which eliminates the individual differences in material uniformity, thickness and other properties caused by multiple sample tests from the root, thereby avoiding the size error and clamping angle deviation caused by manual operation. In this way, the reference height of each angle test of the fabric is uniform, which can accurately reflect the true anisotropy of the fabric, and the accuracy of the test and the comparability of the data are effectively guaranteed. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional bottom view of the lifting platform and rotating ring of the present invention; Figure 3 This is a three-dimensional top view of the lifting platform and rotating ring of the present invention; Figure 4 This is a three-dimensional top view of the upper and lower testing platforms of the present invention; Figure 5 This is a perspective bottom view of the upper and lower testing platforms of the present invention; Figure 6 This is a perspective view of the upper detection stage and upper clamping block of the present invention; Figure 7 This is a perspective view of the lower detection stage and lower clamping block of the present invention; Figure 8 This is a perspective view of the fixing cylinder and collar of the present invention.

[0027] In the diagram: 1. Workbench; 2. Lifting platform; 3. Rotating ring; 4. Upper inspection platform; 5. Lower inspection platform; 6. Upper notch; 7. Fixing box; 8. Vertical rod; 9. Elastic spring; 10. Extrusion strip; 11. Vertical sliding groove; 12. First slider; 13. Upper clamping block; 14. Horizontal rod; 15. Upper pull plate; 16. First slot; 17. Lower notch; 18. Lower clamping block; 19. Horizontal sliding groove; 20. Second slider; 21. Connecting column; 22. Lower pull plate; 23. First insertion rod; 24. Magnet block; 25. Fixing cylinder; 26. Collar; 27. Rotating rod; 28. Sleeve; 29. ​​Vertical plate; 30. Electromagnet; 31. Second slot; 32. Second insertion rod; 33. Groove; 34. Guide rod; 35. Hydraulic cylinder; 36. Connecting plate; 37. Fixing strip. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0030] like Figures 1-8 As shown in the figure, an embodiment of the present invention discloses a rapid detection device for the tensile modulus of elasticity of fabric under constant load, including a worktable 1, a lifting platform 2 and a rotating ring 3 located on the worktable 1.

[0031] The top surface of the lifting platform 2 is provided with a lower inspection platform 5, and an upper inspection platform 4 is provided parallel above the lower inspection platform 5. The upper inspection platform 4 has multiple upper recesses 6, and the lower inspection platform 5 has multiple lower recesses 17. An upper clamping component is provided in the upper recess 6, and a lower clamping component is provided in the lower recess 17.

[0032] The upper inspection platform 4 is equipped with a vertical pushing component for driving the upper clamping component downward.

[0033] The upper clamping assembly includes an upper clamping block 13, the side of which is connected to an upper pull plate 15 via a crossbar 14.

[0034] The lower clamping assembly includes a lower clamping block 18, the side of which is connected to a connecting post 21 and a pull-down plate 22.

[0035] Magnet blocks 24 are provided on the sides of both the upper pull plate 15 and the lower pull plate 22.

[0036] A vertical plate 29 is provided on the rotating ring 3, and an electromagnet 30 is provided on the vertical plate 29.

[0037] The specific testing methods are as follows: S1. Lay the cut circular fabric to be tested flat on the surface of the lower testing platform 5, and mark the center of the fabric. The lower testing platform 5 has a hole in the center, so that the center mark of the fabric can be pressed into the hole, which can ensure that the fabric coincides with the center of the lower testing platform 5. This avoids eliminating the angle error and force deviation caused by eccentric loading from the root.

[0038] S2. The lifting platform 2 can drive the lower inspection platform 5 to move synchronously by moving vertically until the lower inspection platform 5 approaches the upper inspection platform 4 and reaches the preset clamping position. At this time, there is still a certain distance between the upper inspection platform 4 and the lower inspection platform 5, that is, the upper clamping block 13 does not contact the fabric.

[0039] S3. When 12 upper clamping blocks 13 and 12 lower clamping blocks 18 are set and evenly distributed along the circumference, each pair of opposing clamping blocks forms a test station with a station interval of 30°, which can cover preset test angles such as 0°, 30°, 60°, and 90°. The rotating ring 3 rotates circumferentially around the central axis of the test table, and drives the electromagnet 30 to rotate synchronously through the vertical plate 29 until the electromagnet 30 is precisely aligned with the clamping block side of the 0° test angle. The vertical pushing component synchronously drives the two pairs of upper clamping blocks 13 corresponding to the 0° angle to move down, and cooperates with the corresponding lower clamping block 18 to clamp the edge of the fabric.

[0040] S4. When the electromagnet 30 is energized, it generates electromagnetic attraction. The opposite sides of the electromagnet 30 and the magnet block 24 are opposite magnetic poles, thus generating an attraction force. The attracted magnet block 24 moves outward in a radial straight line, realizing unidirectional radial stretching of the fabric. During the loading process, the system forms a closed-loop force control by dynamically adjusting the driving current of the electromagnet, and accurately stabilizes the tension at the preset constant load value within milliseconds, and then enters the load holding stage.

[0041] S5. During the holding load stage, an industrial camera can be installed above the center of the upper testing platform 4. The speckle image of the sample surface can be continuously acquired through the industrial camera on the top. The true strain data of the uniform strain zone in the center of the sample can be calculated by the DIC digital image correlation algorithm, while avoiding the stress concentration area clamped at the edge, so as to obtain the true elastic strain of the material.

[0042] The control system combines real-time tensile force, sample thickness, and gauge length parameters, and automatically calculates the constant load tensile elastic modulus of the fabric at the current angle according to the calculation formula of constant load tensile elastic modulus, and stores the data in the system in association with the corresponding angle.

[0043] S6. After the current angle test is completed, the electromagnet 30 is de-energized, the electromagnetic attraction disappears immediately, and the upper clamping block 13 loses the drive of the vertical pushing component. The upper clamping block 13 is reset upwards. In this way, the clamping force of the upper clamping block 13 and the lower clamping block 18 is completely released from the edge of the fabric and returns to the non-working avoidance state, ensuring that the fabric boundary is completely free and without additional constraint interference during subsequent angle tests.

[0044] S7. The rotating ring 3 rotates axially and drives the electromagnet 30 to rotate synchronously through the vertical plate 29 until it rotates to the next test angle, such as 30°. Repeat the above steps S3-S6 to complete the elastic modulus test of all preset angles in sequence.

[0045] Throughout the testing process, the fabric remains fixed on the lower testing platform 5, eliminating the need for secondary clamping or sample rotation. This fundamentally eliminates individual differences in multi-sample testing and consistency errors caused by manual clamping. After all angle tests are completed, the system automatically integrates the modulus data from all angles, generating anisotropic curves of tensile modulus of elasticity from 0° to 90°, and simultaneously outputs a test report including derived parameters such as maximum and minimum values ​​and anisotropy rate. Subsequently, the lifting platform 2 drives the lower testing platform 5 to descend and reset, allowing the operator to remove the tested fabric sample, thus concluding a single full-angle testing process.

[0046] Because a tension sensor is installed between the upper clamping block 13 and the crossbar 14, or between the upper pull plate 15 and the crossbar 14, and fixed by a flange or other means, when the upper pull plate 15 is pulled by electromagnetic force to move radially linearly, the tension sensor can collect the pure radial tension value, and feed the analog signal back to the control system after analog-to-digital conversion; the system synchronously obtains the current air gap distance between the electromagnet 30 and the magnet block 24 according to the real-time displacement stroke of the clamping unit, calls the pre-stored calibration curve to correct the current reference in real time, and further fine-tunes the excitation current according to the real-time force value deviation through the PID algorithm. When the measured tension is lower than the target value, the excitation current is increased to enhance the electromagnetic attraction; when the measured tension is higher than the target value, the excitation current is decreased to reduce the electromagnetic attraction.

[0047] Once the measured tensile force value stabilizes within the allowable error range of the target load for a preset time, the system determines that it has entered the steady-state load-holding phase. During the load-holding process, closed-loop regulation continues to operate, offsetting force fluctuations caused by fabric creep and micro-deformation of the mechanism in real time, and maintaining constant tensile force. Simultaneously, the visual strain acquisition system is activated during the load-holding phase to acquire deformation data of the uniform strain zone at the center of the sample for subsequent elastic modulus calculation.

[0048] In one specific embodiment of the present invention, a groove 33 is provided on the top surface of the workbench 1, and a hydraulic cylinder 35 is provided on the inner wall of the workbench 1.

[0049] The lifting platform 2 and the rotating ring 3 are both located in the groove 33. The outer circular wall of the rotating ring 3 is connected to the groove wall of the groove 33 by a bearing. A set of guide rods 34 are welded to the bottom surface of the lifting platform 2. The bottom end of the guide rods 34 penetrates the wall of the worktable 1. The piston rod of the hydraulic cylinder 35 penetrates the wall of the worktable 1 and is bolted to the bottom surface of the lifting platform 2.

[0050] Specifically, such as Figure 2 and Figure 3 As shown, the lifting platform 2 can move vertically on the workbench 1 via a set of guide rods 34. When it is necessary to drive the lower inspection platform 5 to move vertically, the hydraulic cylinder 35 will be energized and operated. The hydraulic cylinder 35 can push the lifting platform 2 to move vertically. Since the lower inspection platform 5 is bolted to the lifting platform 2, the lower inspection platform 5 can move synchronously.

[0051] The workbench 1 has a hollow structure and a servo motor is installed inside. An internal gear ring is installed on the inner circular wall of the rotating ring 3. A gear that meshes with the internal gear ring is fixed on the spindle of the servo motor. When the electromagnet 30 needs to be rotated to a specified test angle, the servo motor is powered on and runs. The servo motor drives the internal gear ring to rotate axially through the gear. The internal gear ring drives the rotating ring 3 to rotate axially on the groove 33. Then, the rotating ring 3 drives the electromagnet 30 to adjust the angle through the vertical plate 29.

[0052] In one specific embodiment of the present invention, the upper recess 6 is distributed in a ring on the upper detection platform 4, the lower recess 17 is distributed in a ring on the lower detection platform 5, the bottom surface of the upper detection platform 4 is located above the bottom surface of the upper clamping block 13, and the top surfaces of the lower detection platform 5 and the lower clamping block 18 are flush.

[0053] The upper clamping block 13 and the lower clamping block 18 are divided into two groups. One group of upper clamping blocks 13 and lower clamping blocks 18 is a movable structure, while the other group of upper clamping blocks 13 and lower clamping blocks 18 is a fixed structure.

[0054] Specifically, such as Figure 4 and Figure 5 As shown, there are multiple upper clamping blocks 13 and lower clamping blocks 18 arranged in a ring, which can evenly cover the edge of the fabric. By using the corresponding upper clamping blocks 13 and lower clamping blocks 18, the edge of the fabric at a specified test angle can be clamped. In this way, the fabric does not need to be clamped frequently during the testing process, which not only simplifies the operation but also improves work efficiency.

[0055] When the fabric is clamped by two sets of upper clamping blocks 13 and lower clamping blocks 18, only one set of upper clamping blocks 13 and lower clamping blocks 18 moves horizontally and stretches the fabric, that is, it stretches the fabric in only one direction. Therefore, there is no need to set radial displacement components on the upper clamping blocks 13 and lower clamping blocks 18 which are fixed structures, that is, there is no need to set up components such as upper pull plate 15, lower pull plate 22 and magnet block 24. At the same time, the upper clamping block 13, which is a fixed structure, is fixed in the fixed box 7 by bolts and the lower clamping block 18, which is a fixed structure, is fixed in the lower recess 17 by bolts and the same method. In this way, while ensuring the mechanical properties of the tensile test, the number of moving parts is greatly reduced, effectively reducing the manufacturing cost and assembly difficulty of the equipment.

[0056] The bottom surface of the upper clamping block 13 has a protrusion, and the top surface of the lower clamping block 18 has a corresponding slot. The surface of the protrusion and the inner wall of the slot are both arc-shaped. When the upper clamping block 13 and the lower clamping block 18 clamp the fabric, the fabric is pressed into the slot under the action of the protrusion to form a bent shape. The contact area is larger than that of a pure plane, and the overall friction is improved. The mechanical interlocking effect generated by the bending can prevent the fabric from slipping along the stretching direction, especially for smooth and thin fabrics.

[0057] The upper clamping block 13 and the protrusion are detachably connected, for example, by bolt fixing. This allows for testing on smooth, slippery, and thin fabrics, and the installation of the protrusion improves the clamping effect.

[0058] For testing on thick, easily torn fabrics, the protrusions are removed and the fabric is directly clamped by the upper clamp 13 and the lower clamp 18.

[0059] In one specific embodiment of the present invention, the upper pull plate 15 is provided with a set of first holes 16 that penetrate itself, and the top surface of the lower pull plate 22 is integrally formed with a set of first inserts 23 that are adapted to the first holes 16.

[0060] Specifically, such as Figure 4 and Figure 5 As shown, when the upper clamping block 13 and the lower clamping block 18 clamp the fabric, the first insert 23 on the lower pull plate 22 can be inserted into the first slot 16 on the upper pull plate 15. At this time, the lower pull plate 22 and the upper pull plate 15 can form a whole, and the magnet blocks 24 on the lower pull plate 22 and the upper pull plate 15 are synchronously spliced ​​into a whole. When the electromagnet 30 is energized to generate electromagnetic attraction, the attraction force is evenly applied to the spliced ​​whole magnet. Through the symmetrical force layout, the upper pull plate 15 and the lower pull plate 22 are pulled to move synchronously in a radial straight line. Then, through the crossbar 14 and the connecting column 21, the upper clamping block 13 and the lower clamping block 18 are driven to move synchronously in a radial direction, realizing pure radial stretching of the fabric and avoiding the shear force generated by the misalignment of the upper and lower clamping blocks from the root.

[0061] The crossbar 14 is fixed to the upper clamping block 13 and the upper pull plate 15 by welding. The connecting column 21 is fixed to the lower clamping block 18 and the lower pull plate 22 by welding. Welding can ensure the structural strength and force transmission rigidity of the connection parts, ensure that the tensile force is stably and seamlessly transmitted to the clamping block, and ensure the force transmission accuracy and operational stability of the fabric tensile test.

[0062] The upper pull plate 15 and the lower pull plate 22 are made of non-magnetic materials such as stainless steel to avoid interfering with the magnetic force between the electromagnet 30 and the magnet block 24.

[0063] In one specific embodiment of the present invention, the lower detection platform 5 is disc-shaped and the upper detection platform 4 is annular. A fixing cylinder 25 is welded and fixed to the inner circle of the lower detection platform 5. A collar 26 connected to its bearing is fitted on the outer circular wall of the fixing cylinder 25. The top end of the fixing cylinder 25 is fixedly connected to the worktable 1 through a set of connecting plates 36.

[0064] A set of symmetrically distributed rotating rods 27 are bolted to the outer circular wall of the collar 26. A sleeve 28 connected to the bearing is fitted on the rotating rod 27. A fixing strip 37 is welded to one end of the rotating rod 27.

[0065] A set of second holes and slots 31 are provided on the vertical plate 29, and a set of second inserts 32 that are adapted to the second holes and slots 31 are integrally formed at the bottom end of the fixing strip 37.

[0066] Specifically, such as Figure 1 and Figure 8 As shown, since the collar 26 can rotate axially on the fixed cylinder 25, a set of rotating rods 27 can also rotate.

[0067] When the rotating ring 3 drives the electromagnet 30 to adjust the angle via the vertical plate 29, the vertical plate 29 can drive the fixing bar 37 to move synchronously via the second insert rod 32, and the fixing bar 37 drives a set of rotating rods 27 to rotate.

[0068] A base is welded to one end face of the rotating rod 27. Multiple threaded holes are opened on the outer circular wall of the base and the collar 26. By selecting different threaded holes, the position of the rotating rod 27 in the vertical direction can be adjusted. After adjustment, the degree of compression of the extrusion strip 10 by the sleeve 28 can be changed, thereby adjusting the downward distance of the upper clamping block 13 to adapt to fabrics of different thicknesses.

[0069] The connecting plate 36 can be used to fix the upper inspection platform 4 in place by fixing the fixing cylinder 25, so that the upper inspection platform 4 is in a suspended state.

[0070] In one specific embodiment of the present invention, the vertical pushing component includes a fixed box 7 located inside the upper recess 6. A set of vertical rods 8 are welded and fixed to the top of the fixed box 7. A spring spring 9 is sleeved on the vertical rod 8. Both ends of the spring spring 9 are welded and fixed to the top wall of the fixed box 7 and the inner wall of the upper recess 6. The top of the vertical rod 8 passes through the upper detection platform 4 and is welded with an extrusion strip 10. The extrusion strip 10 is arc-shaped, and both ends of the extrusion strip 10 are set with bevels.

[0071] Specifically, such as Figure 5 and Figure 6 As shown, when the fabric needs to be clamped, the rotating rod 27 rotates. During the rotation, the rotating rod 27 rotates to above the extrusion strip 10. At this time, the sleeve 28 on the rotating rod 27 contacts the inclined surface on one side of the extrusion strip 10 and rolls along the inclined surface to the top surface of the extrusion strip 10. During this process, the sleeve 28 applies a downward extrusion force to the extrusion strip 10, forcing the extrusion strip 10 to move downward. When the extrusion strip 10 moves, it can drive the fixed box 7 to move through a set of vertical rods 8. Since the upper clamping block 13 is located inside the fixed box 7, the fixed box 7 can drive the upper clamping block 13 to move downward synchronously. The upper clamping block 13 contacts the fabric and completes the clamping operation.

[0072] When the sleeve 28 separates from the extrusion bar 10, the extrusion bar 10 loses its extrusion force. Under the action of the elastic potential energy of the spring spring 9, the fixing box 7 and the extrusion bar 10 can reset and move upward, thereby driving the upper clamping block 13 to separate from the fabric.

[0073] In one specific embodiment of the present invention, the top of the fixing box 7 is open, and vertical sliding grooves 11 are provided on both sides of the upper recess 6. The outer walls on both sides of the fixing box 7 protrude to form first sliders 12 that are adapted to the vertical sliding grooves 11. The crossbar 14 on the upper clamping block 13 passes through the side wall of the fixing box 7.

[0074] Specifically, such as Figure 6 As shown, the first slider 12 can only slide vertically in the vertical sliding groove 11, thus the fixing box 7 is a vertically movable structure in the upper recess 6. The first slider 12 and the vertical sliding groove 11 play a guiding role to prevent the upper clamping block 13 from deviating when it moves downward, thus ensuring the subsequent clamping effect.

[0075] Meanwhile, the upper clamping block 13 is a horizontally operating structure within the fixed box 7 via a set of crossbars 14. The crossbars 14 serve as guides to ensure that the upper clamping block 13 does not deviate during horizontal movement, thus ensuring the radial stretching effect on the fabric.

[0076] In one specific embodiment of the present invention, transverse sliding grooves 19 are provided on both sides of the lower recess 17, and second sliders 20 that are adapted to the transverse sliding grooves 19 are protruding from both sides of the lower clamping block 18.

[0077] Specifically, such as Figure 7 As shown, the second slider 20 can only slide horizontally within the transverse sliding groove 19, and the lower clamping block 18 has a horizontally movable structure in the lower recess 17. Under the guidance of the second slider 20 and the transverse sliding groove 19, the lower clamping block 18 is prevented from shifting during horizontal movement, thus ensuring the radial stretching effect on the fabric.

[0078] In the description of this specification, terms such as "connection," "installation," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within this invention based on the specific circumstances.

[0079] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0080] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for rapid detection of tensile modulus of elasticity of fabric under constant load, comprising a worktable (1), a lifting platform (2) and a rotating ring (3) located on the worktable (1). Its features are: The lifting platform (2) has a lower inspection platform (5) on its top surface. An upper inspection platform (4) is arranged parallel above the lower inspection platform (5). The upper inspection platform (4) has multiple upper recesses (6), and the lower inspection platform (5) has multiple lower recesses (17). An upper clamping component is arranged in the upper recess (6), and a lower clamping component is arranged in the lower recess (17). The upper detection platform (4) is equipped with a vertical pushing component for driving the upper clamping component downward. The upper clamping assembly includes an upper clamping block (13), the side of which is connected to an upper pull plate (15) via a crossbar (14). The lower clamping assembly includes a lower clamping block (18), the side of which is connected to a lower pull plate (22) via a connecting post (21). Magnet blocks (24) are provided on the sides of both the upper pull plate (15) and the lower pull plate (22). A vertical plate (29) is provided on the rotating ring (3), and an electromagnet (30) is provided on the vertical plate (29).

2. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 1, characterized in that: The workbench (1) has a groove (33) on its top surface and a hydraulic cylinder (35) on its inner wall. The lifting platform (2) and the rotating ring (3) are both located in the groove (33). The outer circular wall of the rotating ring (3) is connected to the groove wall bearing of the groove (33). A set of guide rods (34) are welded to the bottom surface of the lifting platform (2). The bottom end of the guide rods (34) penetrates the wall of the worktable (1). The piston rod of the hydraulic cylinder (35) penetrates the wall of the worktable (1) and is bolted to the bottom surface of the lifting platform (2).

3. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 1, characterized in that: The upper notch (6) is arranged in a ring on the upper detection platform (4), and the lower notch (17) is arranged in a ring on the lower detection platform (5). The bottom surface of the upper detection platform (4) is located above the bottom surface of the upper clamping block (13), and the top surfaces of the lower detection platform (5) and the lower clamping block (18) are flush. The upper clamping block (13) and the lower clamping block (18) are divided into two groups. One group of the upper clamping block (13) and the lower clamping block (18) are movable structures, while the other group of the upper clamping block (13) and the lower clamping block (18) are fixed structures.

4. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 1, characterized in that: The upper pull plate (15) has a set of first holes (16) that penetrate itself, and the top surface of the lower pull plate (22) is integrally formed with a set of first inserts (23) that are adapted to the first holes (16).

5. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 1, characterized in that: The vertical pushing component includes a fixed box (7), which is located inside the upper recess (6). A set of vertical rods (8) are welded and fixed to the top of the fixed box (7). A spring spring (9) is sleeved on the vertical rod (8). Both ends of the spring spring (9) are welded and fixed to the top wall of the fixed box (7) and the inner wall of the upper recess (6). The top of the vertical rod (8) passes through the upper detection platform (4) and is welded with an extrusion strip (10). The extrusion strip (10) is arc-shaped, and both ends of the extrusion strip (10) are set with bevels.

6. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 5, characterized in that: The top of the fixed box (7) is open, and vertical sliding grooves (11) are provided on both sides of the upper recess (6). The outer walls on both sides of the fixed box (7) protrude to form a first slider (12) that matches the vertical sliding groove (11). The upper clamping block (13) is located inside the fixed box (7), and the crossbar (14) on the upper clamping block (13) passes through the side wall of the fixed box (7).

7. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 1, characterized in that: The lower recess (17) has transverse sliding grooves (19) on both sides of its side walls, and the lower clamping block (18) has protruding second sliders (20) that are adapted to the transverse sliding grooves (19) on both sides of its side walls.

8. The rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 1, characterized in that: The lower inspection platform (5) is disc-shaped, and the upper inspection platform (4) is annular. A fixing cylinder (25) is welded and fixed to the inner circle of the lower inspection platform (5). A collar (26) connected to its bearing is fitted on the outer wall of the fixing cylinder (25). The top of the fixing cylinder (25) is fixedly connected to the worktable (1) through a set of connecting plates (36). A set of symmetrically distributed rotating rods (27) are bolted to the outer circular wall of the collar (26). A sleeve (28) connected to its bearing is fitted on the rotating rod (27). A fixing strip (37) is welded to one end of the rotating rod (27).

9. A rapid detection device for the tensile modulus of elasticity of fabric under constant load according to claim 8, characterized in that: A set of second holes (31) are provided on the vertical plate (29), and a set of second inserts (32) that are adapted to the second holes (31) are integrally formed at the bottom end of the fixing strip (37).

10. A method for implementing a rapid detection device for the tensile modulus of elasticity of a fabric under constant load as described in any one of claims 1-9, characterized in that: Includes the following steps, S1. Lay the circular fabric to be tested flat in the center area of ​​the lower testing platform (5) to complete the sample loading; S2, The lifting platform (2) drives the lower testing platform (5) to move upward to the clamping working position; S3. The rotating ring (3) drives the electromagnet (30) to rotate to the target test angle. The two upper clamping blocks (13) at the corresponding angle begin to move downward under the drive of the vertical push component, and cooperate with the corresponding lower clamping block (18) to clamp the fabric. S4. When the electromagnet (30) is energized, it is loaded to the preset load and maintained by force closed-loop control. The magnetic force generated by the electromagnet (30) and the magnet block (24) pulls one of the upper clamping blocks (13) and the lower clamping block (18) to move along the fabric radially. S5. Collect the real strain data of the uniform strain zone in the center of the sample, and calculate and store the tensile elastic modulus of the fabric at the current angle by combining the real-time tensile force value. S6. The electromagnet (30) is de-energized and unloaded, and the upper clamp (13) moves upward to reset and release the fabric. S7. The rotating ring (3) drives the electromagnet (30) to rotate to the next target test angle. Repeat steps S3-S6 until all preset angle tests are completed.

Images