Stretching detection device for stretch fabric production

Abstract

The utility model relates to the technical field of elastic cloth production, especially is a kind of tensile testing device for elastic cloth production, including processing table, be provided with tensile detection mechanism on the processing table and be used for elastic cloth tensile detection, tensile detection mechanism includes: clamping component, including the left and right sides of the pedestal being set on the processing table, the first shaft rod and the second shaft rod of the upper end rotationally mounted in the inside of pedestal and be arranged, both ends of first shaft rod and second shaft rod are fixed with first clamping arm and second clamping arm, first clamping plate is fixed between two ends of first clamping arm, second clamping plate is fixed between two ends of second clamping arm, both ends of first shaft rod are fixed with first gear, both ends of second shaft rod are fixed with second gear and are engaged with first gear transmission;By symmetrical synchronous clamping, it is ensured that sample stress is uniform and firm without slip, and clamping and stretching movement are decoupled, so that the high stability of stretching process and the accurate and reliable measurement data are realized.

Description

Technical Field

[0001] This utility model relates to the field of elastic fabric production technology, specifically to a tensile testing device for elastic fabric production. Background Technology

[0002] Elastic fabric, as a functional fabric widely used in clothing, medical, sports and home furnishing fields, has elastic properties that are the core indicators determining the comfort, shaping effect and service life of products. According to CN223611238U, a device for testing the tensile strength of high-strength fiber cloth tape is disclosed. This technology discloses a device comprising: "a base, with a fixing component fixed to one end of the top of the base and another fixing component movably installed at the other end of the top of the base; the fixing component includes a base plate, with two C-shaped plates fixed to the top of the base plate; a connecting plate is fixed to both C-shaped plates; guide rods are fixed to both ends of the top of the base plate; connecting rods are slidably fitted onto the two guide rods; and pressure plates are fixed to both ends of the bottom of the connecting rods. Through the design of the base plate, C-shaped plates, connecting plates, and pressure plates, simultaneous testing of tapes of the same length but different thicknesses, as well as tapes of the same thickness but different lengths, can be achieved during use. Since frequent tape disassembly and installation are unnecessary, the workload of operators is significantly reduced, improving overall testing efficiency." In existing technologies, elastic fabric tensile testing devices generally employ independently controlled upper and lower clamping components, with the clamping action typically performed by two separate drive mechanisms. Due to unavoidable dimensional tolerances in machining and assembly, and inherent differences in response speed and control precision between the two independent drive systems, it is difficult for the upper and lower clamping plates to achieve true synchronous movement during the closing process. This asynchrony directly causes uneven distribution of clamping force on the elastic fabric sample in the width direction in both time and space, resulting in one end of the sample being compacted before the other. Consequently, at the moment clamping is completed, asymmetrical initial stress and local wrinkles have already formed inside the sample. This uneven pre-tightening state becomes a source of interference in subsequent tensile tests, causing the sample to exhibit unnatural deformation patterns in the early stages of tensile testing. Ultimately, this distorts the measured key data such as breaking strength and elongation, failing to accurately reflect the homogeneous mechanical properties of the material. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a tensile testing device for elastic fabric production. By using symmetrical and synchronous clamping, it ensures that the sample is subjected to uniform force and is firmly fixed without slippage, and decouples the clamping from the tensile motion, thereby achieving high stability of the tensile process and accurate and reliable measurement data.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tensile testing device for elastic fabric production, comprising a processing table, wherein a tensile testing mechanism is provided on the processing table for tensile testing of the elastic fabric, the tensile testing mechanism comprising: The clamping assembly includes uprights on the left and right sides above the processing table. Inside the uprights, a first shaft and a second shaft are rotatably mounted on the upper end and arranged vertically. A first clamping arm and a second clamping arm are fixed at both ends of the first shaft and the second shaft. A first clamping plate is fixed between the first clamping arms at both ends and a second clamping plate is fixed between the second clamping arms at both ends. A first gear is fixed at both ends of the first shaft and a second gear is fixed at both ends of the second shaft and meshes with the first gear for transmission. A support rod is fixed on the outer wall of the middle part of the first shaft, and guide wheels are rotatably mounted on both sides of the lower end of the support rod. The drive assembly includes a first cylinder pivotally connected to the lower end of the inside of the processing table, a guide crossbar pivotally connected to the upper output end of the first cylinder, guide crossbar grooves are provided inside both the left and right ends of the guide crossbar, and the guide wheel is located inside the guide crossbar groove. The measuring component includes a second cylinder pivotally connected to the left and right ends of the top of the machining table. A force sensor is installed at the output end of the second cylinder, and the force sensor is connected to the stand.

[0005] Preferably, the clamping assembly further includes anti-slip strips fixed to both the second clamping plate and the first clamping plate.

[0006] Preferably, the drive assembly further includes balance bars fixed to both sides of the lower end of the guide crossbeam and slidably mounted longitudinally through the processing table.

[0007] Preferably, the measuring component further includes a guide rail fixed to the top of the processing table, a slider fixed to the bottom of the stand, and the slider is slidably mounted on the guide rail.

[0008] Preferably, the top surface of the processing table is provided with a scale for observing and measuring the deformation of the elastic fabric.

[0009] Preferably, the first gear is coaxially and fixedly connected to the first shaft, and the second gear is coaxially and fixedly connected to the second shaft.

[0010] Beneficial effects This invention provides a tensile testing device for elastic fabric production. Compared with the prior art, it has the following advantages: 1. The guide crossbar is driven vertically by the first cylinder. Through the interaction between the guide cross grooves at both ends of the crossbar and the guide wheels fixed to the lower end of the support rod, the linear motion is converted into the swing of the support rod. The support rod is fixed to the first shaft, which drives the first shaft to rotate, thereby causing the first gear fixed at both ends of the first shaft to rotate synchronously. The first gear meshes with the second gear fixed to the second shaft, driving the second shaft to rotate synchronously in the opposite direction. The first clamping arm and the second clamping arm fixed at both ends of the first shaft and the second shaft, respectively, swing in opposite directions, causing the first clamping plate and the second clamping plate at their ends to perform synchronous and symmetrical opening or closing actions, thereby realizing the clamping and release of the sample. This ensures that the two ends of the sample are subjected to the same and uniformly distributed clamping force during clamping, effectively avoiding local stress concentration or slippage of the sample caused by uneven clamping force, and improving the repeatability and accuracy of the test.

[0011] 2. One of the clamping components is moved by the second cylinder to apply a tensile force to the sample. This force is transmitted to the force sensor and measured accurately in real time. After clamping, the clamping component can still move freely for stretching. This is because, in the clamping state, when the second cylinder drives the stand to move horizontally along the guide rail, the guide wheel can roll horizontally along the guide groove, so that the clamping action is completely decoupled from the subsequent horizontal stretching motion. This ensures that the clamping is stable and does not affect the smooth and linear stretching of the sample, thus ensuring the purity of the stretching process and the accuracy of the force measurement. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the outer end of the clamping component in this utility model; Figure 3 This is a schematic diagram of the side end of the clamping component in this utility model; Figure 4 This is a schematic diagram of the drive component and the measurement component in this utility model.

[0013] In the diagram: 1. Processing table; 2. Tensile testing mechanism; 21. Clamping assembly; 211. Stand; 212. First shaft; 213. Second shaft; 214. First clamping arm; 215. Second clamping arm; 216. First clamping plate; 217. Second clamping plate; 218. First gear; 219. Second gear; 2110. Support rod; 2111. Guide wheel; 2112. Anti-slip strip; 22. Drive assembly; 221. First cylinder; 222. Guide crossbeam; 223. Guide cross groove; 224. Balance bar; 23. Measuring assembly; 231. Second cylinder; 232. Force sensor; 233. Guide rail; 234. Slider. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a tensile testing device for elastic fabric production, including a processing table 1, on which a tensile testing mechanism 2 is provided for tensile testing of elastic fabric, the tensile testing mechanism 2 including: The clamping assembly 21 includes a stand 211 disposed on the left and right sides above the processing table 1. The upper end of the stand 211 is rotatably mounted with a first shaft 212 and a second shaft 213 arranged vertically. A first clamping arm 214 and a second clamping arm 215 are fixed at both ends of the first shaft 212 and the second shaft 213. A first clamping plate 216 is fixed between the two ends of the first clamping arm 214. A second clamping plate 217 is fixed between the two ends of the second clamping arm 215. A first gear 218 is fixed at both ends of the first shaft 212. A second gear 219 is fixed at both ends of the second shaft 213 and meshes with the first gear 218 for transmission. A support rod 2110 is fixed to the outer wall of the middle part of the first shaft 212. Guide wheels 2111 are rotatably mounted on both sides of the lower end of the support rod 2110. The drive assembly 22 includes a first cylinder 221 pivotally connected to the lower end of the inside of the processing table 1. A guide crossbeam 222 is pivotally connected to the upper output end of the first cylinder 221. Guide crossbeams 223 are provided inside both the left and right ends of the guide crossbeam 222, and the guide wheel 2111 is located inside the guide crossbeam 223. The measuring component 23 includes a second cylinder 231 pivotally connected to the left and right ends of the top of the processing table 1. A force sensor 232 is installed at the output end of the second cylinder 231, and the force sensor 232 is connected to the stand 211.

[0016] In this embodiment, the first cylinder 221 drives the guide crossbar 222 to move vertically. The guide crossbar 222, through its two ends with guide grooves 223, interacts with the guide wheels 2111 fixed to the lower end of the support rod 2110, converting linear motion into the swinging motion of the support rod 2110. The support rod 2110 is fixed to the first shaft 212, causing the first shaft 212 to rotate, which in turn causes the first gears 218 fixed to its two ends to rotate synchronously. The first gears 218 mesh with the second gears 219 fixed to the second shaft 213, driving the second shaft 213 to rotate synchronously in the opposite direction. The first clamping arms 214 and 215, respectively fixed to the ends of the first shaft 212 and the second shaft 213, swing in opposite directions, causing the first clamping plates 216 and 217 at their ends to perform synchronous and symmetrical opening or closing actions, thereby achieving the clamping and release of the sample. Simultaneously, the second cylinder 231 drives one of the clamping components 21 to move, applying a tensile force to the sample. This force is transmitted to the force sensor 232 and measured accurately in real time. This ensures that both ends of the sample are subjected to the same and uniformly distributed clamping force during clamping, effectively avoiding local stress concentration or slippage caused by uneven clamping force, thus improving the repeatability and accuracy of the test. Furthermore, the clamping component 21 can still move freely for stretching after clamping. This is because, in the clamping state, when the second cylinder 231 drives the stand 211 to move horizontally along the guide rail 233, the guide wheel 2111 can roll horizontally along the guide groove 223, completely decoupling the clamping action from the subsequent horizontal stretching motion. This ensures stable clamping without affecting the smooth and linear stretching of the sample, ensuring the purity of the stretching process and the accuracy of the force measurement.

[0017] Specifically, the clamping assembly 21 also includes anti-slip strips 2112 fixed on both the second clamping plate 217 and the first clamping plate 216.

[0018] In this embodiment, the anti-slip strip 2112 can be made of an elastomer with a high coefficient of friction, such as rubber or polyurethane. When the first cylinder 221 drives the clamping plate to close, the anti-slip strip 2112 first contacts the elastic cloth sample and produces a moderate embedding effect within its elastic deformation range, thereby significantly improving the static friction between the clamping surface and the sample by increasing the actual contact area and local pressure distribution.

[0019] Specifically, the drive assembly 22 also includes balance bars 224 fixed on both sides of the lower end of the guide crossbeam 222 and slidably mounted through the processing table 1 longitudinally.

[0020] In this embodiment, when the first cylinder 221 drives the guide crossbeam 222 to move vertically, the double-sided sliding support formed by the balance bar 224 and the processing table 1 can effectively constrain any potential swaying or deflection of the guide crossbeam 222 in the horizontal direction, ensuring that the movement trajectory of the guide crossbeam 222 remains strictly vertical.

[0021] Specifically, the measuring component 23 also includes a guide rail 233 fixed to the top of the processing table 1, and a slider 234 fixed to the bottom of the stand 211, and the slider 234 is slidably mounted on the guide rail 233.

[0022] In this embodiment, when the second cylinder 231 drives the stand 211 to move horizontally to stretch the elastic fabric sample, the cooperation between the slider 234 and the guide rail 233 provides precise and low-friction linear guidance for the stand 211 and the entire clamping assembly 21 connected thereto.

[0023] Specifically, the top surface of the processing table 1 is provided with scale markings for observing and measuring the deformation of the elastic fabric.

[0024] In this embodiment, the scale provides the operator with an intuitive and reliable visual measurement benchmark. During the test, the operator can use this scale to directly observe and record the initial position of specific marked points or clamping edges on the elastic fabric sample, as well as the real-time displacement during the stretching process, thereby quickly obtaining the change in the elongation of the sample without relying on complex electronic equipment.

[0025] Specifically, the first gear 218 is coaxially and fixedly connected to the first shaft 212, and the second gear 219 is coaxially and fixedly connected to the second shaft 213.

[0026] The working principle and usage process of this utility model are as follows: First, the operator places both ends of the elastic fabric sample between the first clamping plate 216 and the second clamping plate 217 of the two clamping components 21. Then, the driving component 22 is activated, and the guide crossbar 222 is driven to move vertically downward through the first cylinder 221. The guide grooves 223 at both ends of the guide crossbar 222 interact with the guide wheels 2111 fixed to the lower end of the support rod 2110, converting the linear motion into the swing of the support rod 2110. The support rod 2110 is fixed to the first shaft 212 and drives it to rotate. This causes the first gear 218 fixed at both ends to rotate synchronously; the first gear 218 meshes with the second gear 219 fixed to the second shaft 213, driving the second shaft 213 to rotate synchronously in opposite directions; the first clamping arm 214 and the second clamping arm 215 fixed at both ends of the first shaft 212 and the second shaft 213 respectively swing in opposite directions, causing the first clamping plate 216 and the second clamping plate 217 at their ends to perform synchronous and symmetrical closing actions, thereby firmly clamping both ends of the sample between the anti-slip strips 2112 to ensure that the clamping force is evenly distributed; After the sample is clamped, the measuring component 23 is activated, and one of the clamping components 21 is driven to move horizontally through the second cylinder 231 to apply tensile force to the sample. During this process, since the guide wheel 2111 can roll freely horizontally along the guide groove 223, the clamping state is maintained and the tensile movement is not affected. The tensile force generated is directly transmitted to the force sensor 232 through the stand 211 for real-time accurate measurement. At the same time, the operator can observe the deformation of the sample with the help of the scale on the top of the processing table 1 until the sample breaks or reaches the predetermined tensile stroke, thus completing a complete tensile test.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensile testing device for elastic fabric production, comprising a processing table (1), characterized in that: The processing table (1) is equipped with a tensile testing mechanism (2) for testing the tensile strength of the elastic fabric. The tensile testing mechanism (2) includes: The clamping assembly (21) includes a stand (211) set on the left and right sides above the processing table (1). The upper end of the stand (211) is rotatably mounted with a first shaft (212) and a second shaft (213) arranged vertically. The first shaft (212) and the second shaft (213) are fixed with a first clamping arm (214) and a second clamping arm (215) at both ends. A first clamping plate (216) is fixed between the first clamping arms (214) at both ends. A second clamping plate (217) is fixed between the second clamping arms (215) at both ends. A first gear (218) is fixed at both ends of the first shaft (212). A second gear (219) is fixed at both ends of the second shaft (213) and meshes with the first gear (218) for transmission. A support rod (2110) is fixed on the outer wall of the middle part of the first shaft (212). Guide wheels (2111) are rotatably mounted on both sides of the lower end of the support rod (2110). The drive assembly (22) includes a first cylinder (221) pivotally connected to the lower end of the processing table (1), and a guide crossbeam (222) pivotally connected to the output end above the first cylinder (221). Guide crossbeams (223) are provided inside both the left and right ends of the guide crossbeam (222), and the guide wheel (2111) is located inside the guide crossbeam (223). The measuring component (23) includes a second cylinder (231) pivotally connected to the left and right ends of the top of the worktable (1). A force sensor (232) is installed at the output end of the second cylinder (231), and the force sensor (232) is connected to the stand (211).

2. The tensile testing device for elastic fabric production according to claim 1, characterized in that: The clamping assembly (21) also includes anti-slip strips (2112) fixed on both the second clamping plate (217) and the first clamping plate (216).

3. The tensile testing device for elastic fabric production according to claim 1, characterized in that: The drive assembly (22) also includes balance bars (224) fixed on both sides of the lower end of the guide crossbar (222) and slidably mounted longitudinally through the processing table (1).

4. The tensile testing device for elastic fabric production according to claim 1, characterized in that: The measuring component (23) also includes a guide rail (233) fixed on the top of the processing table (1), and a slider (234) fixed at the bottom of the stand (211), and the slider (234) is slidably mounted on the guide rail (233).

5. The tensile testing device for elastic fabric production according to claim 1, characterized in that: The top surface of the processing table (1) is provided with a scale for observing and measuring the deformation of the elastic fabric.

6. The tensile testing device for elastic fabric production according to claim 1, characterized in that: The first gear (218) is coaxially and fixedly connected to the first shaft (212), and the second gear (219) is coaxially and fixedly connected to the second shaft (213).

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