Carbon Fiber Bending Resilience Testing Device

Abstract

The present invention discloses a test device for the bending resilience of carbon fiber, comprising: a gauge, a base point, a shear line, a positioning post and a limiting member; angle graduation lines for measuring angles are engraved on the gauge, and the angle graduation lines take a point on the gauge as the graduation center; the base point is arranged on the 0° graduation line of the angle graduation lines; the shear line is arranged between the graduation center and the base point and is perpendicular to the 0° graduation line of the angle graduation lines; the positioning post is arranged on the gauge and is located at the graduation center of the angle graduation lines; the limiting member is used to limit the carbon fiber on the positioning post. The test device for the bending resilience of carbon fiber provided by the present invention is not only simple in structure and convenient to use; moreover, through this test device for bending resilience, the rebound angle and the original angle of the carbon fiber can be measured, and the ratio of the two is used as the result data of the bending resilience of the carbon fiber, so as to characterize the hardness of the carbon fiber, and can scientifically guide the incoming inspection work of carbon fiber for downstream users.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon fiber detection, and particularly relates to a device for testing the bending resilience of carbon fiber. Background Art

[0002] Carbon fiber is light in weight and high in strength. With the acceleration of the localization process, it is widely used in various fields such as aerospace, rail transit, leisure sports, and building reinforcement.

[0003] For high-end carbon fiber models, carbon fiber enterprises often produce according to orders, and even in short supply. However, for general carbon fiber models, in addition to order production, inventory supply is also adopted. For carbon fiber in inventory, due to different sizing agent components on the surface and different storage periods, some become hard. The hard carbon fiber will cause problems such as incomplete impregnation during prepreg processing or warping of the fabric surface during prepreg layup, affecting the quality of the parts.

[0004] Therefore, how to detect the hardness of carbon fiber is an urgent problem to be solved. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for testing the bending resilience of carbon fiber with simple structure and convenient operation, by testing the bending resilience of carbon fiber and characterizing the hardness of carbon fiber with the bending resilience, so as to solve the problems in the prior art.

[0006] In order to achieve the above purpose, the technical solution provided by the present invention is as follows:

[0007] A device for testing the bending resilience of carbon fiber, comprising: a gauge, a base point, a shear line, a positioning post, and a limiting member;

[0008] Angle scale lines for measuring angles are engraved on the gauge, and the angle scale lines are centered on a point on the gauge;

[0009] The base point is located on the 0° scale line of the angle scale line;

[0010] The shear line is provided between the scale center and the base point and is perpendicular to the 0° scale line of the angle scale line;

[0011] The positioning post is provided on the gauge and is located at the scale center of the angle scale line;

[0012] The limiting member is used to limit the carbon fiber on the positioning post.

[0013] Further, the range of the angle scale line of the gauge is 0 - 120°.

[0014] Further, the accuracy of the angle scale line is 1°.

[0015] Further, the positioning post is configured to be cylindrical. The bottom surface of the positioning post is tangent to the 0° graduation line of the angular graduation line, and the center of the bottom surface of the positioning post is located on the 90° graduation line of the angular graduation line.

[0016] Further, the radius of the positioning post is 20 - 40 mm, and the height of the positioning post is 40 - 60 mm.

[0017] Further, a positioning groove is recessed in the positioning post, and the depth of the positioning groove is 2 - 5 mm.

[0018] Further, the gauge is configured to be a disc with a radius of 150 - 300 mm, and the center of the gauge is the graduation center of the angular graduation line.

[0019] Further, the distance between the graduation center and the base point is 40 - 100 mm, and the distance between the shear line and the base point is 10 mm.

[0020] Further, the limiting member is configured to be a metal block with a weight of 100 - 1000 g.

[0021] Advantages of the present invention:

[0022] Compared with the prior art, the carbon fiber bending resilience testing device provided by the present invention is not only simple in structure and convenient to use; moreover, through this bending resilience testing device, the rebound angle and the original angle of the carbon fiber can be measured, and the ratio of the two is used as the result data of the carbon fiber bending resilience, so as to characterize the hardness of the carbon fiber, and it can scientifically guide the incoming inspection work of carbon fiber for downstream users. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present application in a use state;

[0025] Figure 2 is Figure 1 A schematic structural diagram of the shown embodiment in another use state.

[0026] Explanation of the reference numerals in the drawings: 10 - gauge; 11 - graduation center; 12 - 0° graduation line; 20 - base point; 30 - shear line; 40 - positioning post; 41 - positioning groove; 50 - limiting member; 61 - first section; 62 - second section. Detailed implementation manners

[0027] The present invention will be described in detail below in conjunction with the various implementation manners shown in the drawings. However, these implementation manners do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these implementation manners is included within the protection scope of the present invention.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In the illustrated embodiments, the directions such as up, down, left, right, front, and back are relative and are used to explain the relative structures and movements of different components in the present application. When the components are in the positions shown in the figures, these representations are appropriate. However, if the description of the element positions changes, then it is considered that these representations will also change accordingly.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] Please refer to Figure 1 As shown, a carbon fiber bending resilience testing device in an implementation manner provided by the present invention includes a gauge 10, a base point 20, a shear line 30, a positioning post 40, and a limiting member 50.

[0031] The gauge 10 is configured as a disc with a radius of 150 - 300 mm. Angle graduation lines for measuring angles are engraved on the surface of the gauge 10, and the angle graduation lines are centered at the scale center 11 on the gauge 10. The range of the angular graduation lines on the gauge 10 is 0 - 120°, and the accuracy of the angular graduation lines is 1°.

[0032] The base point 20 is provided on the 0° graduation line 12 of the angular graduation lines of the gauge 10, and the distance between the base point 20 and the scale center 11 is 40 - 100 mm. A fixing device is provided at the base point 20, and through this fixing device, the carbon fiber can be fixed at the base point 20.

[0033] The shear line 30 is provided between the scale center 11 and the base point 20 and is perpendicular to the 0° graduation line 12 of the angular graduation lines. The distance between the shear line 30 and the base point 20 is 10 mm, and the shear line 30 extends from the 0° graduation line 12 of the angular graduation lines to the edge of the gauge 10.

[0034] The positioning post 40 is fixedly arranged on the gauge 10 and is located at the scale center 11 of the angular scale line. Among them, the positioning post 40 is configured to be cylindrical, the bottom surface of the positioning post 40 is tangent to the 0° scale line 12 of the angular scale line, and the center of the bottom surface of the positioning post 40 falls on the 90° scale line of the angular scale line.

[0035] Among them, the radius of the positioning post 40 is 20 - 40 mm, and the height of the positioning post 40 is 40 - 60 mm. A positioning groove 41 is also recessed on the positioning post 40, and the depth of the positioning groove 41 is 2 - 5 mm. The setting of the positioning groove 41 can facilitate the limitation of the carbon fiber when the carbon fiber is wound around the positioning post 40.

[0036] The limiting member 50 is used to limit the carbon fiber wound around the positioning post 40 on the positioning post 40 to prevent the carbon fiber from detaching from the positioning post 40. The positioning post 40 is configured as a smooth cylindrical or square metal block with a weight of 100 - 1000 g.

[0037] The present invention will be further described below in conjunction with specific usage scenarios:

[0038] Please refer to Figure 1 and Figure 2 As shown, during use, select a section of carbon fiber with a length of 160 - 300 mm, wind the carbon fiber around the positioning groove 41 of the positioning post 40, and pull the two ends of the carbon fiber with appropriate force to make the carbon fiber taut; then cross - fix the two ends of the carbon fiber at the base point 20 to keep the carbon fiber in a taut state, so that a first section 61 and a second section 62 of the carbon fiber form an angle at the base point 20; abut the limiting member 50 against a predetermined position of the positioning post 40 to limit the carbon fiber wound around the positioning post 40; use a protractor to measure the angle of the carbon fiber at the base point 20 to obtain angle A; cut the second section 62 of the carbon fiber with scissors based on the cutting line 30, the second section 62 of the carbon fiber will bounce open at a certain angle, and read the angle corresponding to the end of the second section 62 of the cut carbon fiber on the gauge 10 to obtain angle B; use B / A to characterize the bending resilience of the carbon fiber.

[0039] According to the present invention, the bending resilience of the in - stock domestic carbon fiber is tested, and the data is as follows:

[0040] Carbon fiber model Storage period Quantity A (mean value) B (mean value) Rebound resilience (B / A) T300 grade - 3K 12 months 10 rolls 25° 38° 1.52 T300 grade - 3K 24 months 10 rolls 25° 46° 1.84 T300 grade - 3K 36 months 10 rolls 25° 63° 2.52 T800 grade - 12K 12 months 10 rolls 25° 36° 1.44 T800 grade - 12K 24 months 10 rolls 25° 52° 2.08 T800 grade - 12K 36 months 10 rolls 25° 76° 3.04

[0041] The carbon fiber bending resilience testing device provided by the present invention is not only simple in structure and convenient to use; moreover, through this bending resilience testing device, the rebound angle B and the original angle A of the carbon fiber can be measured, and the ratio of the two is used as the result data of the carbon fiber bending resilience, so as to characterize the softness and hardness of the carbon fiber, and can scientifically guide the incoming inspection work of carbon fiber for downstream users.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0043] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A carbon fiber bending resilience testing device, characterized in that Including: A gauge, a base point, a shear line, a positioning post, and a limiting member; Angle graduation lines for measuring angles are engraved on the gauge, and the angle graduation lines are centered at a point on the gauge; The base point is provided on the 0° graduation line of the angle graduation lines; The shear line is provided between the graduation center and the base point and is perpendicular to the 0° graduation line of the angle graduation lines; The positioning post is provided on the gauge and is located at the graduation center of the angle graduation lines; The limiting member is used to limit the carbon fiber to the positioning post.

2. The carbon fiber bending resilience testing device according to claim 1, wherein, The measuring range of the angle graduation lines of the gauge is 0 to 120°; 3. The carbon fiber flexural resilience testing device according to claim 2, wherein, The accuracy of the angle graduation lines is 1°; 4. The carbon fiber bending resilience testing device according to claim 2, characterized in that, The positioning post is configured to be cylindrical. The bottom surface of the positioning post is tangent to the 0° graduation line of the angle graduation lines, and the center of the bottom surface of the positioning post is located on the 90° graduation line of the angle graduation lines; 5. The carbon fiber bending resilience testing device according to claim 4, wherein The radius of the positioning post is 20 to 40 mm, and the height of the positioning post is 40 to 60 mm; 6. The carbon fiber bending resilience testing device according to claim 5, wherein A positioning groove is further recessed on the positioning post, and the depth of the positioning groove is 2 to 5 mm; 7. The carbon fiber flexural resilience testing device according to claim 1, wherein The gauge is configured to be a disc with a radius of 150 to 300 mm, and the center of the gauge is the graduation center of the angle graduation lines; 8. The carbon fiber bending resilience testing device according to claim 1, wherein The distance between the graduation center and the base point is 40 to 100 mm, and the distance between the shear line and the base point is 10 mm; 9. The carbon fiber bending resilience testing device according to claim 1, wherein, The limiting member is configured to be a metal block with a weight of 100 to 1000 g.

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