Device for detecting bending stiffness of fabric

Abstract

The utility model discloses a device for detecting the bending stiffness of a fabric. Comprising a test board, guide rails arranged on the test board in parallel, a sliding block arranged on the guide rails, a driving mechanism arranged on the test board and used for driving the sliding block to move front and back, a cloth pressing device arranged on the sliding block, an infrared receiving module and an infrared transmitting module, and the cloth pressing device controls the sliding block to move front and back through the driving mechanism. A fabric clamping plane is formed between the test board and the cloth pressing device, a fabric to be tested is pressed on the fabric clamping plane through the cloth pressing device and is pushed forwards, an inclined plane is arranged at the front end of the fabric clamping plane, the inclination angle of the inclined plane is 41.5 degrees, and the infrared receiving module and the infrared transmitting module are arranged at the top edge and the bottom edge of the inclined plane respectively. The problems that the subjective factor is too large or the equipment structure is complex and the fabric test application range is small when an existing device is used for testing the fabric bending stiffness can be solved, the structure is simple, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of fabric detection equipment, and particularly relates to a device for detecting the bending stiffness of fabrics. Background Technique

[0002] At present, when testing the stiffness of fabrics such as glass fiber fabrics or carbon fiber fabrics used in composite materials, the method of GB / T 7689.4-2013 is usually adopted. The standard method can be summarized as pushing the sample to be tested out of the platform. There is an inclined plane with a certain inclination angle on one side of the platform. When the suspended part of the sample bends under the action of gravity until it touches the inclined plane, the bending stiffness is calculated according to the bending length of the sample. The sample size in the above standard is 250×25mm. For fabrics with a large yarn width such as glass fiber fabrics or carbon fiber fabrics, when the sample is only 25mm wide, the number of yarns in the width direction is likely to be inconsistent during sample cutting, resulting in large differences between samples. In the test method, the sample is manually pushed by a person, and at the same time, it is judged by the naked eye whether the front end of the sample touches the inclined plane, which is highly subjective and causes different test effects for different individuals.

[0003] In recent years, powder-sprinkled shaped fabrics have begun to be popularly used for fabrics in composite materials. This kind of fabric has high stiffness, and its bending length in the inclined plane test is very easy to exceed 200mm. When testing its stiffness, samples of 400×250mm are often used, and the width of 250mm is selected to reduce the influence of different numbers of yarns in the width direction on the bending length test.

[0004] At present, some of the existing patents are still tested manually, with strong human subjective factors, such as CN 211426223U. Another part of the fully automatic test equipment has a complex structure, and the equipment space is basically occupied by various internal components, with a high cost. There is insufficient space for testing samples of about 400×250mm, such as CN 216410930U. Therefore, there is a need for a detection device that can be different from the pure manual test method, can avoid the disadvantage that the speed of the manual pushing process is difficult to control, and can adjust the equipment modules and structures according to needs to achieve a wider test size range for testing samples of different specifications. Summary of the Invention

[0005] In order to solve certain or some technical problems existing in the prior art, the purpose of this application is to provide a device for detecting the bending stiffness of fabrics, which can solve the problems of too large subjective factors or complex equipment structure and small applicable range of fabric testing in the existing device when testing the bending stiffness of fabrics, and has a simple structure, is easy to operate, and has a low manufacturing cost.

[0006] To solve the above-mentioned existing technical problems, the purpose of this application is achieved by adopting the following technical solutions:

[0007] A device for detecting the bending stiffness of a fabric, comprising a test bench, two guide rails arranged in parallel on the test bench, two sliders respectively arranged on the two guide rails, a driving mechanism arranged on the test bench for driving the sliders to move back and forth, a cloth pressing device arranged on the sliders, an infrared receiving module and an infrared transmitting module arranged on the test bench. The cloth pressing device controls the sliders to move back and forth through the driving mechanism. A fabric clamping plane is formed between the test bench and the cloth pressing device. The fabric to be tested is pressed on the fabric clamping plane through the cloth pressing device and pushed forward. The front end of the fabric clamping plane is provided with an inclined plane, and the inclination angle of the inclined plane is 41.5°. The infrared receiving module and the infrared transmitting module are respectively arranged at the top edge and the bottom edge of the inclined plane.

[0008] Preferably, the driving mechanism comprises a servo motor arranged on the test bench, a lead screw connected to one of the sliders, and a connecting rod for connecting the two sliders in series. The lead screw rotates forward and backward through the servo motor.

[0009] Preferably, the cloth pressing device comprises a mounting seat with both ends arranged on the sliders, a pressing plate rotatably arranged on the mounting seat, and a pushing platform protruding downward at the rear end of the pressing plate. The fabric to be detected is pushed forward through the pushing platform.

[0010] Preferably, the mounting seat comprises a fixed shaft arranged between the two sliders and a rotating shaft arranged at one end of the pressing plate. The rotating shaft is sleeved on the fixed shaft.

[0011] Preferably, the rotating shaft adopts a C-shaped structure, and the pressing plate can be quickly replaced through the rotating shaft.

[0012] Preferably, a baffle is also arranged on the test bench along the guide rail.

[0013] Preferably, the test bench is provided with a plurality of positioning holes, and the baffle is detachably arranged in the positioning holes.

[0014] Preferably, a plurality of annular limiting grooves are arranged on the fixed shaft, and the rotating shaft is arranged in the limiting grooves.

[0015] Preferably, a scale plate is arranged on the test bench, and the starting position of the scale plate is aligned with the rear end face of the pressing plate.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] It can test the bending stiffness of fiberglass fabrics, carbon fiber fabrics, and powder-sprinkled and shaped fabrics. Different from the pure manual testing method, it uses a driving mechanism to push the sample, avoiding the disadvantage of difficult speed control during manual pushing. It detects the position of the front end of the sample through infrared, and feeds back to the driving mechanism to stop the pushing action, avoiding inaccurate human judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the combined structure of the present utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the cloth pressing device in the present utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the positioning hole in the present utility model;

[0021] In the figure: 1, test bench; 2, guide rail; 3, driving mechanism; 31, servo motor; 32, lead screw; 33, connecting rod; 4, slider; 5, cloth pressing device; 51, propulsion table; 52, mounting seat; 521, fixed shaft; 522, rotating shaft; 53, limiting groove; 54, pressing plate; 6, scale plate; 7, baffle; 8, infrared receiving module; 9, inclined plane; 10, infrared transmitting module; 11, positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, in combination with the drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0024] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0025] As Figure 1 shown, a device for detecting the bending stiffness of a fabric includes a test bench 1, two guide rails 2 arranged in parallel on the test bench 1, two sliders 4 respectively arranged on the two guide rails 2, a driving mechanism 3 arranged on the test bench 1 for driving the sliders 4 to move back and forth, a fabric pressing device 5 arranged on the sliders 4, an infrared receiving module 8 and an infrared transmitting module 10 arranged on the test bench 1. The fabric pressing device 5 controls the sliders 4 to move back and forth through the driving mechanism 3. A fabric clamping plane is formed between the test bench 1 and the fabric pressing device 5. The fabric to be tested is pressed on the fabric clamping plane through the fabric pressing device 5 and pushed forward. A slope 9 is arranged at the front end of the fabric clamping plane, and the inclination angle of the slope 9 is 41.5°. The infrared receiving module 8 and the infrared transmitting module 10 are respectively arranged at the top edge and the bottom edge of the slope 9.

[0026] During the actual test process, the infrared receiving module 8 and the infrared transmitting module 10 are respectively installed at the middle positions of the top edge and the bottom edge of the slope 9. The infrared rays emitted by the infrared transmitting module 10 form a loop after being received by the infrared receiving module 8. The fabric sample to be detected is placed on the fabric clamping plane of the test bench 1. After the fabric to be detected is pressed on the test bench 1 through the fabric pressing device 5, the driving mechanism 3 is started to control the sliders 4 to move forward along the guide rails 2, so that the fabric pressing device 5 pushes the fabric to be detected smoothly towards the slope 9. When the midpoint of the front edge of the fabric sample blocks the infrared rays, the loop formed by the infrared transmitting module 10 and the infrared receiving module 8 is interrupted, thereby controlling the driving mechanism 3 to stop rotating immediately. At this time, the moving distance of the fabric pressing device 5 is recorded as the bending length of the sample on the slope 9 with an angle of 41.5°. Through this structure, the bending stiffness of glass fiber fabrics, carbon fiber fabrics and powder-sprinkled shaped fabrics can be tested. Different from the pure manual test method, the driving mechanism 3 is used to push the sample, avoiding the disadvantage that the speed is difficult to control during the manual pushing process. By detecting the front-end position of the sample through infrared rays and feeding back to stop the pushing action of the driving mechanism 3, the situation of inaccurate human judgment is avoided, effectively solving the problems of too large subjective factors, too complex equipment structure and small applicable range of fabric testing existing in the existing device when testing the bending stiffness of fabrics. The overall structure is simple, the operation is convenient, and the manufacturing cost is low.

[0027] Further improved, the driving mechanism 3 includes a servo motor 31 arranged on the test bench 1, a lead screw 32 connected to one of the sliders 4, and a connecting rod 33 for connecting the two sliders 4 in series. The lead screw 32 rotates forward and backward through the servo motor 31.

[0028] The lead screw 32 is arranged in parallel along the guide rail 2. When moving the two sliders 4 back and forth along the guide rail 2, only by controlling the forward and reverse rotation of the servo motor 31 can the back-and-forth movement be achieved, making the forward and backward movement control of the cloth pressing device 5 simpler and more convenient. Especially after being combined with the infrared emission module 10, the effect of accurate automatic stop can be achieved, avoiding the precision error existing in manual stop operation and making the test data more accurate and objective.

[0029] Further improvement is made as follows. As Figure 2 shown, the cloth pressing device 5 includes a mounting seat 52 with both ends arranged on the slider 4, a pressing plate 54 rotatably arranged on the mounting seat 52, and a pushing platform 51 protruding downward at the rear end of the pressing plate 54. The fabric to be detected is pushed forward through the pushing platform 51.

[0030] When testing the fabric sample to be detected, after the pressing plate 54 is turned upward, the fabric sample to be detected can be placed flat on the fabric clamping plane. Then, after the pressing plate 54 is turned downward, the fabric sample to be detected is clamped in the fabric clamping plane. One side of the fabric sample to be detected is in contact with the pushing platform 51. When the cloth pressing device 5 moves forward, the fabric sample to be detected can be driven to move forward synchronously through the pushing platform 51, thus realizing the test.

[0031] Further improvement is made as follows. The mounting seat 52 includes a fixed shaft 521 arranged between the two sliders 4 and a rotating shaft 522 arranged at one end of the pressing plate 54. The rotating shaft 522 is sleeved on the fixed shaft 521.

[0032] It is simpler and more convenient to turn the pressing plate 54, and the overall structure is simple and the operation is convenient.

[0033] Further improvement is made as follows. The rotating shaft 522 adopts a C-shaped structure, and the pressing plate 54 can be quickly replaced through the rotating shaft 522.

[0034] When testing samples of different widths, it can be disassembled and replaced through the C-shaped notch on the rotating shaft 522, with higher flexibility and wider application range. The equipment module and structure can be adjusted according to needs to meet the requirements of testing samples of different specifications. The maximum size of the sample that can be tested is 400×250mm, and the minimum size is 250×25mm.

[0035] Further improvement is made as follows. A baffle 7 is also arranged on the test bench 1 along the guide rail 2.

[0036] The baffle 7 is installed on one or both sides of the pressing plate 54. When placing the fabric sample to be detected, the baffle 7 can limit the flatness of the fabric sample to be detected, avoiding the inclination problem after placement and also avoiding the phenomenon that the fabric sample to be detected deviates to one side or both sides during the advancing process.

[0037] Further improvement is made as follows. As Figure 3 shown, the test bench 1 is provided with a plurality of positioning holes 11, and the baffle 7 is detachably arranged in the positioning holes 11.

[0038] By installing in different positioning holes 11, the baffle 7 can be adapted to the widths of different fabric samples to be detected, avoiding the situation that it is difficult to make the middle part located on the infrared line after placing along the baffle 7 on one side when the sample size changes.

[0039] Still further improvement is made as follows. A plurality of annular limiting grooves 53 are provided on the fixed shaft 521, and the rotating shaft 522 is arranged in the limiting grooves 53.

[0040] When the pressing plate 54 is connected to the fixed shaft 521 through the rotating shaft 522, the axial limitation of the rotating shaft 522 can be achieved through the limiting grooves 53, avoiding the phenomenon of left - right sliding after installation. When installing the pressing plate 54, it is no longer necessary to limit it through the baffle 7, making the installation position of the baffle 7 more flexible.

[0041] Still further improvement is made as follows. A scale piece 6 is provided on the test bench 1, and the starting position of the scale piece 6 is aligned with the rear end face of the pressing plate 54.

[0042] The starting position "0" of the scale piece 6 is aligned with the rear end face of the pressing plate 54. When the fabric sample to be detected is moving, the bending length of the fabric sample can be quickly obtained through the numbers exposed on the scale piece 6, avoiding the problem of later measurement and avoiding test errors caused by subjective operation errors.

[0043] The above - mentioned embodiments are only the preferred embodiments of the present application and cannot be used to limit the scope of protection of the present application. Any non - substantial changes and substitutions made by those skilled in the art based on the present application belong to the scope of protection required by the present application.

Claims

1. A device for detecting the bending stiffness of fabric, characterized in that: The invention comprises a test bench (1), two guide rails (2) arranged in parallel on the test bench (1), two sliders (4) respectively arranged on the two guide rails (2), a driving mechanism (3) arranged on the test bench (1) for driving the slider (4) to move forward and backward, a cloth pressing device (5) arranged on the slider (4), an infrared receiving module (8) and an infrared transmitting module (10) arranged on the test bench (1), wherein the cloth pressing device (5) controls the slider (4) to move forward and backward through the driving mechanism (3), a fabric clamping plane is formed between the test bench (1) and the cloth pressing device (5), the fabric to be tested is pressed on the fabric clamping plane by the cloth pressing device (5) and pushed forward, a slope (9) is arranged at the front end of the fabric clamping plane, the slope (9) has an inclination angle of 41.5°, and the infrared receiving module (8) and the infrared transmitting module (10) are respectively arranged at the top edge and the bottom edge of the slope (9).

2. The device for detecting the bending stiffness of fabric according to claim 1, characterized in that: The driving mechanism (3) comprises a servo motor (31) arranged on the test bench (1), a lead screw (32) connected to one of the sliders (4), and a connecting rod (33) for connecting two sliders (4) in series, wherein the lead screw (32) is rotated forward and reversely by the servo motor (31).

3. The device for detecting the bending stiffness of fabric according to claim 1, characterized in that: The cloth pressing device (5) comprises a mounting seat (52) with two ends arranged on the slider (4), a pressing plate (54) rotatably arranged on the mounting seat (52), and a pushing platform (51) protruding downwardly and arranged at the rear end of the pressing plate (54), and the fabric to be inspected is pushed forward by the pushing platform (51).

4. The device for detecting the bending stiffness of fabric according to claim 3, characterized in that: The mounting seat (52) comprises a fixed shaft (521) arranged between the two sliding blocks (4) and a rotating shaft (522) arranged at one end of the pressing plate (54), wherein the rotating shaft (522) is sleeved on the fixed shaft (521).

5. The device for detecting the bending stiffness of fabric according to claim 4, characterized in that: The rotating shaft (522) adopts a C-shaped structure, and the pressing plate (54) can be quickly replaced through the rotating shaft (522).

6. The device for detecting the bending stiffness of fabric according to claim 5, characterized in that: The test bench (1) is also provided with a baffle (7) arranged along the guide rail (2).

7. The device for detecting the bending stiffness of fabric according to claim 6, characterized in that: The test bench (1) is provided with a plurality of positioning holes (11), and the baffle (7) is detachably arranged in the positioning holes (11).

8. The device for detecting the bending stiffness of fabric according to claim 7, characterized in that: The fixed shaft (521) is provided with a plurality of annular limiting grooves (53), and the rotating shaft (522) is arranged in the limiting grooves (53).

9. A device for detecting bending stiffness of fabric according to any one of claims 3 to 8, characterized in that: The test bench (1) is provided with a scale plate (6), and the starting position of the scale plate (6) is aligned with the rear end surface of the pressing plate (54).

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