Device and method for testing wear resistance of carbon fiber

Abstract

The invention discloses a carbon fiber wear resistance testing device and method.The carbon fiber wear resistance testing device comprises a testing platform, a moving platform, a left side fiber fixing clamp, a right side fiber fixing clamp, a balance weight and a traction rope, and the left side fiber fixing clamp and the right side fiber fixing clamp are arranged at the left end and the right end of the top surface of the testing platform respectively; the motion platform is arranged on the test platform, a friction rod group is arranged on the motion platform, a moving block is arranged at the top of the friction rod group, the friction rod group moves up and down, a to-be-tested carbon fiber penetrates through the friction rod group, and two ends of the to-be-tested carbon fiber are fixedly connected with the left fiber fixing clamp and the right fiber fixing clamp respectively and are tensioned by a counterweight; and the horizontal movement and the vertical movement of the friction rod group can be respectively used for carrying out transverse and longitudinal wear resistance tests on the carbon fibers. According to the invention, transverse and longitudinal wear resistance tests can be simultaneously carried out on the carbon fibers, and complex wear resistance test conditions are provided for the carbon fibers, so that powerful evaluation parameters are provided for research and development of the carbon fibers.

Description

Technical Field

[0001] The invention relates to a device and a method for testing the wear resistance of carbon fiber, and belongs to the technical field of carbon fiber wear resistance testing. Background Art

[0002] Carbon fiber is a new type of material. Compared with general metal products, carbon fiber has excellent weight reduction effect under the premise of equal performance. It has been widely used in aerospace, chemical, automobile and construction fields. With the continuous advancement of science and technology, carbon fiber will be applied in a wider range of fields and will create more value for human material development.

[0003] The evaluation of the performance of carbon fiber process applicability has always been a prominent problem. Manufacturers and customers often hold different opinions and refuse to give in to each other, making it difficult to reach a consensus. Therefore, proposing a test evaluation method that is recognized by both parties is of guiding significance to the industry. Wear between the fiber and the hook during the preparation of the carbon fiber preform is one of the main causes of fiber damage, so accurate characterization of wear resistance helps to obtain more accurate design parameters in the design process of carbon fiber composite products.

[0004] Chinese patent CN105445131A discloses a method and device for testing the wear resistance of fiber bundles. The fiber is passed through a chrome-plated stainless steel rod with an angle of 60°. CCD cameras are set before and after the rod to measure the amount of fiber fuzzing during friction. However, the tension of the traction fiber cannot be controlled, and the traction speed of the device is slow, only 0.1-10 rpm. Chinese patent CN201310203231.7 discloses a method for testing the wear resistance of carbon fiber bundles. The invention method can realize the wear resistance test of different carbon fibers by setting parameters such as tension and friction speed, but its too small test range cannot reflect the specific friction conditions during the carbon fiber processing process. Chinese patent CN111551461A discloses a device and method for testing the wear resistance of high-performance fiber bundles. The method can arbitrarily design the fiber bending angle during friction and adjust the fiber traction tension, but the patent cannot provide a longitudinal wear resistance test of the fiber.

[0005] The testing methods for carbon fiber or other fibers in the above patents all test the transverse direction of the fiber. However, in the actual preform weaving process, there is also longitudinal friction between the fiber and the needle structure. In other application fields of the fiber, there is also the phenomenon of simultaneous existence of transverse and longitudinal friction. Summary of the invention

[0006] The purpose of the present invention is to provide a test device for the wear resistance of carbon fiber, so as to solve the technical defect that the test device for the wear resistance of carbon fiber in the prior art can only perform transverse wear resistance test on the fiber but cannot perform longitudinal wear resistance test on the carbon fiber.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is: a testing device for the wear resistance of carbon fiber, including a testing platform, a moving platform, a left fiber fixing clamp, a right fiber fixing clamp, a counterweight and a traction rope, the left fiber fixing clamp and the right fiber fixing clamp are respectively arranged at the left and right ends of the top surface of the testing platform, wherein the right fiber fixing clamp is fixed on the testing platform, and the left fiber fixing clamp can move left and right on the testing platform, one end of the traction rope is connected to the left fiber fixing clamp, and the other end is bent downward from the edge of the testing platform and connected to the counterweight, the moving platform is arranged on the testing platform, and can move left and right on the testing platform, and more than one friction rod group is arranged on the moving platform, and the friction rod group moves with the moving platform The friction rod group moves up and down synchronously with the up and down movement of the moving block. The friction rod group passes through the moving platform and can move vertically relative to the moving platform. A moving block is arranged on the top of the friction rod group, and a vertical supporting plate is arranged on the moving platform. The moving block is arranged on the vertical supporting plate and forms a vertical moving pair with the vertical supporting plate. A vertical driving device is arranged on the vertical supporting plate, and the vertical driving device is connected with the moving block to drive the moving block to move up and down. The friction rod group moves up and down synchronously with the up and down movement of the moving block. The carbon fiber to be tested passes through the friction rod group, and its two ends are respectively fixedly connected to the left fiber fixing clamp and the right fiber fixing clamp, and are tightened by the counterweight. The horizontal and vertical movements of the friction rod group can be used for transverse and longitudinal wear resistance tests of the carbon fiber, respectively.

[0008] As a further improvement of the present invention, it also includes a fixed block, which is fixed on the test platform. After the traction rope is fixed to the left fiber fixing clamp, it passes through the fixed block and is connected to the counterweight. A guide rod is arranged on the fixed block, and the guide rod passes through the left fiber fixing clamp. The left fiber fixing clamp can move along the length direction of the guide rod. A counting number is arranged on the test platform for recording the number of horizontal and / or vertical movements of the friction rod group. After the carbon fiber is worn off, the counterweight pulls the left fiber fixing clamp to hit the fixed block through the traction rope, and the counter stops counting.

[0009] As a further improvement of the present invention, there are two guide rods, which are parallel and fixedly connected to the fixing block at one end. Both guide rods pass through the left fiber fixing clamp. When in use, the end of the carbon fiber is fixed between the two guide rods.

[0010] As a further improvement of the present invention, a horizontal support plate is fixed on the top of the vertical support plate, one or more guide rods are arranged between the horizontal support plate and the moving platform, the moving block is slidably arranged on the guide rods, and the vertical driving device is arranged on the horizontal support plate.

[0011] As a further improvement of the present invention, the vertical drive device is a drive motor, whose output shaft passes downward through the horizontal support plate and is connected to a screw rod. The bottom end of the screw rod is rotatably connected to the motion platform. The screw rod passes through the moving block and cooperates with the moving block thread. The drive motor drives the screw rod to rotate, thereby driving the moving block to move vertically.

[0012] As a further improvement of the present invention, a connecting plate is fixed to a side of the moving block away from the vertical supporting plate, the connecting plate is fixedly connected to the moving block, and the top end of the friction rod group is fixedly connected to the connecting plate.

[0013] As a further improvement of the present invention, the left fiber fixing clamp and the right fiber fixing clamp have the same structure, both including an upper clamp block and a lower clamp block, the upper clamp block is provided with a fastening bolt, the fastening bolt passes through the upper clamp block and cooperates with the thread of the lower clamp block, and tightening the fastening bolt is used to clamp the carbon fiber between the upper clamp block and the lower clamp block, the lower clamp block of the left fiber fixing clamp can be moved on the test platform, and the lower clamp block of the right fiber fixing clamp is fixed on the test platform.

[0014] As a further improvement of the present invention, a through groove is opened on the test platform in the left and right directions, and the bottom end of the friction rod extends into the through groove. A horizontal driving device is arranged in the test platform, and the horizontal driving device is connected to the motion platform for driving the motion platform to move left and right.

[0015] Another object of the present invention is to provide a method for testing the wear resistance of carbon fiber, which uses a testing device for the wear resistance of carbon fiber; first, fix the carbon fiber to be tested, pass the carbon fiber through all the friction rod groups, and fix the two ends of the carbon fiber to the left fiber fixing clamp and the right fiber fixing clamp respectively; second, test the wear resistance of the carbon fiber. If only the lateral wear resistance of the carbon fiber needs to be tested, the friction rod group is horizontally moved on the test platform by the motion platform to make the carbon fiber rub laterally; if only the longitudinal wear resistance of the carbon fiber needs to be tested, the friction rod group is vertically moved by the moving block to make the carbon fiber rub longitudinally; if both the lateral and longitudinal wear resistance of the carbon fiber need to be tested at the same time, the moving platform is horizontally moved while the moving block is vertically moved; when the carbon fiber is worn off, the counterweight pulls the left fiber fixing clamp to hit the fixed block, and the counter stops counting and records the number of frictions.

[0016] As a further improvement of the present invention, fixing the carbon fiber to be tested includes fixing one end of the carbon fiber to be tested on the right fiber fixing fixture, passing the other end of the carbon fiber to be tested through the friction rod group in sequence, then pulling the left fiber fixing fixture toward the right fiber fixing fixture, and fixing the other end of the carbon fiber to be tested on the left fiber fixing fixture.

[0017] To sum up, the beneficial effects of the present invention are as follows: the motion platform in the present invention moves horizontally on the test platform, and the friction rod group moves horizontally synchronously therewith; the horizontal movement of the friction rod group relative to the carbon fiber to be tested can realize the transverse wear resistance test of the carbon fiber, and the vertical movement of the friction rod group relative to the motion platform makes the friction rod group move in the vertical direction relative to the carbon fiber, thereby realizing the longitudinal wear resistance test of the carbon fiber; in the present invention, the friction rod group moves horizontally with the motion platform and moves vertically on the motion platform at the same time, thereby simultaneously performing transverse and longitudinal wear resistance tests on the carbon fiber, thereby providing complex wear resistance test conditions for the carbon fiber, thereby providing powerful evaluation parameters for the research and development of carbon fiber.

[0018] The present invention arranges a fixed block on the test platform, which can, on the one hand, effectively prevent the counterweight from falling to the ground by pulling the left fiber fixing clamp through the traction rope after the carbon fiber to be tested breaks; on the other hand, the counter stops counting through the contact between the left fiber fixing clamp and the fixed block, and the guide rod on the fixed block can guide the movement of the left fiber fixing clamp.

[0019] The present invention arranges two guide rods on the fixing block so that the left fiber fixing fixture is subjected to more uniform force when moving. After the carbon fiber is broken during the test, the left fiber fixing fixture contacts the fixing block quickly to stop counting, so that the test data is more accurate.

[0020] The invention makes the vertical movement of the moving block smoother through the cooperation between the guide rod and the moving block, and the friction rod group will not get stuck when moving up and down.

[0021] The present invention adopts a driving motor to drive the screw to rotate, and the screw converts its rotation into linear motion of a moving block, so that the moving block moves vertically, and the friction rod group moves up and down with the vertical movement of the moving block, so as to perform a longitudinal wear resistance test on the carbon fiber.

[0022] The present invention arranges a connecting plate on the moving block, which, on the one hand, increases the space for fixing the friction rod group, and on the other hand, facilitates the fixing of the friction rod group.

[0023] The present invention adopts the cooperation of the upper clamping block and the lower clamping block to clamp the carbon fiber, thereby facilitating the fixation of the carbon fiber.

[0024] The present invention drives the motion platform to move horizontally on the test platform through a horizontal driving device, and a through slot is provided on the test platform, which can effectively prevent the test platform from hindering the horizontal movement of the friction rod group.

[0025] The invention can perform transverse and longitudinal wear resistance tests on carbon fibers separately or simultaneously. The test method is simple, easy to operate and has high test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the present invention from another angle.

[0028] Among them: 1. Test platform; 2. Motion platform; 3. Left fiber fixing fixture; 4. Right fiber fixing fixture; 5. Counterweight; 6. Traction rope; 7. Friction rod group; 8. Moving block; 9. Vertical support plate; 10. Vertical drive device; 11. Fixed pulley; 12. Fixed block; 13. Guide rod; 14. Horizontal support plate; 15. Guide rod; 16. Screw rod; 17. Connecting plate; 18. Upper clamping block; 19. Lower clamping block; 20. Fastening bolts. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings. Example 1

[0030] like Figure 1 and Figure 2 The test device for the wear resistance of carbon fiber shown in the figure comprises a test platform 1, a moving platform 2, a left fiber fixing fixture 3, a right fiber fixing fixture 4, a counterweight 5 and a traction rope 6, wherein the left fiber fixing fixture 3 and the right fiber fixing fixture 4 are respectively arranged at the left and right ends of the top surface of the test platform 1, and are respectively used to clamp the carbon fiber to be tested from both ends, wherein the right fiber fixing fixture 4 is fixed on the test platform 1, and its position on the test platform 1 is fixed in the use state, and it will not move relative to the test platform 1, the left fiber fixing fixture 3 can move left and right on the test platform 1, and a fixed pulley 11 is arranged at the left edge of the test platform 1, one end of the traction rope 6 is connected to the left fiber fixing fixture 3, and the other end is bent downward by bypassing the fixed pulley 11 at the edge of the test platform 1, and is connected to the counterweight 5, and the counterweight 5 in this embodiment adopts a weight, and the mass range of the weight is 10g~1000g, and when in use, different weights can be replaced as needed to change the weight of the counterweight.

[0031] like Figure 1 and Figure 2As shown, the motion platform 2 in this embodiment is arranged on the test platform 1, and can move left and right on the test platform 1, and more than one friction rod group 7 is arranged on the motion platform 2, each friction rod group 7 includes two friction rods, the two friction rods are arranged in parallel, and the distance between the two friction rods is slightly larger than the diameter of the carbon fiber to be tested. In the use state, the carbon fiber to be tested passes between the two friction rods, and the friction rod group 7 moves left and right synchronously with the left and right movement of the mobile platform. In the use state, since the two ends of the carbon fiber to be tested are fixed, the horizontal movement of the friction rod group 7 provides lateral friction for the carbon fiber to be tested. The friction rod in this embodiment is a stainless steel rod, and its height is 30 to 50 cm. The stainless steel rod in this embodiment can also be replaced with a friction rod such as plastic, fur, etc. to achieve friction testing between fibers and different materials.

[0032] like Figure 1 and Figure 2 As shown, the friction rod group 7 in this embodiment passes through the motion platform 2 and can move vertically relative to the motion platform 2. The vertical movement of the friction rod group 7 generates longitudinal friction on the carbon fiber to be tested. In this embodiment, a moving block 8 is arranged on the top of the friction rod group 7, and a vertical support plate 9 is arranged on the motion platform 2. The vertical support plate 9 moves synchronously with the movement of the motion platform 2. The moving block 8 is arranged on the vertical support plate 9 and forms a vertical moving pair with the vertical support plate 9. The vertical movement of the moving block 8 on the vertical support plate 9 causes the friction rod group 7 to move vertically. A vertical driving device 10 is arranged on the vertical support plate 9. The vertical driving device 10 is connected to the moving block 8 and is used to drive the moving block 8 to move up and down on the vertical support plate 9. The friction rod group 7 moves up and down synchronously with the up and down movement of the moving block 8.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, the carbon fiber to be tested passes through the friction rod group 7, and its two ends are fixedly connected to the left fiber fixing clamp 3 and the right fiber fixing clamp 4 respectively, and are tightened by the counterweight 5. The horizontal movement and vertical movement of the friction rod group 7 can be used to perform transverse and longitudinal wear resistance tests on the carbon fiber respectively. In this embodiment, if only the transverse wear resistance test is performed on the carbon fiber, it is only necessary to move the motion platform 2 horizontally on the test platform 1. In this state, the friction rod group 7 moves synchronously with the motion platform 2 to generate transverse friction on the carbon fiber; if only the longitudinal wear resistance test is performed on the carbon fiber, the motion platform 2 does not move, and it is only necessary to move the friction rod group 7 up and down to provide longitudinal friction to the carbon fiber; if it is necessary to perform transverse and longitudinal wear resistance tests on the carbon fiber at the same time, while the motion platform 2 moves horizontally on the test platform 1, the friction rod group 7 moves vertically relative to the motion platform 2, so that the friction rod group 7 generates friction on the carbon fiber in the horizontal and vertical directions respectively.

[0034] like Figure 1and Figure 2 As shown, the present embodiment is provided with a fixed block 12, which is fixed on the test platform 1, and the fixed block 12 is located on the left side of the left fiber fixing fixture 3. The traction rope 6 passes through the fixed block 12 and can move relative to the fixed block 12. After the traction rope 6 is fixed to the left fiber fixing fixture 3, it passes through the fixed block 12 to the left and then bypasses the fixed pulley 11 to connect the counterweight 5. In order to guide the movement of the left fiber fixing fixture 3, the present embodiment is fixedly provided with guide rods 13 on the left and right sides of the fixed block 12. The guide rod 13 is located on the right side of the left fiber fixing fixture 3 and passes through the left fiber fixing fixture 3. The left fiber fixing fixture 3 can move along the length direction of the guide rod 13. The guide rod 13 guides and limits the left and right movement of the left fiber fixing clamp 3. In this embodiment, a counter is set on the test platform 1 to record the number of horizontal and / or vertical movements of the friction rod group 7. After the carbon fiber is worn off, the counterweight 5 pulls the left fiber fixing clamp 3 to hit the fixed block 12 through the traction rope 6, and the counter stops counting. The above counting records the number of horizontal movements of the motion platform 2 and the number of vertical movements of the moving block 8. In this embodiment, two counters can be set, which are respectively used to record the number of horizontal movements of the motion platform 2 and the number of vertical movements of the moving block 8 when the test starts until the carbon fiber is worn off. The counter itself and its connection method are both existing technologies and are not described in detail in this embodiment.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the optimal number of guide rods 13 is set to two, the two guide rods 13 are parallel and the left ends thereof are fixedly connected to the fixing block 12, and the two guide rods 13 both pass through the left fiber fixing fixture 3. When in use, the end of the carbon fiber is fixed between the two guide rods 13. The use of two guide rods 13 makes the movement of the left fiber fixing fixture 3 more stable, and because the carbon fiber is fixed to the left fiber fixing fixture 3 between the two guide rods 13, the force on the left fiber fixing fixture 3 is also more uniform.

[0036] like Figure 1 and Figure 2As shown in the figure, a horizontal support plate 14 is fixed to the top of the vertical support plate 9 in this embodiment. The horizontal support plate 14, the vertical support plate 9, and the moving platform 2 form a structure with a "C"-shaped longitudinal section. Between the horizontal support plate 14 and the moving platform 2, there are two left and right guide rods 15. The top and bottom ends of the guide rods 15 are respectively fixedly connected to the horizontal support plate 14 and the moving platform 2. The moving block 8 is slidably arranged on the guide rods 15. In this embodiment, the guide rods 15 pass through the moving block 8, enabling the moving block 8 to move vertically on the guide rods 15. The vertical movement of the moving block 8 is guided by the guide rods 15. The vertical driving device 10 is arranged on the horizontal support plate 14. The vertical driving device 10 in this embodiment is a driving motor detachably installed on the horizontal support plate 14 by bolts. The output shaft of the driving motor passes downward through the horizontal support plate 14 and is connected with a lead screw 16 by a coupling. The bottom end of the lead screw 16 is rotatably connected to the moving platform 2 by a bearing. The lead screw 16 passes through the moving block 8 and is in threaded cooperation with the moving block 8. The driving motor drives the lead screw 16 to rotate, and the rotation of the lead screw 16 is converted into a linear motion of the moving block 8 to drive the moving block 8 to move vertically.

[0037] As Figure 1 and Figure 2 shown in the figure, on one side of the moving block 8 away from the vertical support plate 9, a connecting plate 17 is fixed. The connecting plate 17 is fixedly connected to the moving block 8, and the length of the connecting plate 17 is greater than the length of the moving block 8. In this embodiment, there are three groups of friction rod groups 7, and the three groups of friction rod groups 7 are distributed in an isosceles triangle with a vertex angle of 120°, enabling this embodiment to provide a 120° friction experiment for the fiber. The top ends of the friction rod groups 7 are fixedly connected to the connecting plate 17.

[0038] As Figure 1 and Figure 2 shown in the figure, the structures of the left fiber fixing fixture 3 and the right fiber fixing fixture 4 in this embodiment are the same, and both include an upper clamping block 18 and a lower clamping block 19. A fastening bolt 20 is arranged on the upper clamping block 18. The fastening bolt 20 passes through the upper clamping block 18 and is in threaded cooperation with the lower clamping block 19. Tightening the fastening bolt 20 is used to clamp the end of the carbon fiber between the upper clamping block 18 and the lower clamping block 19. The lower clamping block 19 of the left fiber fixing fixture 3 can move on the test platform 1, and both guide rods 13 pass through the lower clamping block 19. The lower clamping block 19 of the right fiber fixing fixture 4 is fixed on the test platform 1. In this embodiment, a plurality of V-shaped anti-slip grooves are arranged on the lower surface of the upper clamping block 18 and the upper surface of the lower clamping block 19 along the front-rear direction, making the fixation of the carbon fiber more firm and preventing the carbon fiber from detaching from the left fiber fixing fixture 3 and the right fiber fixing fixture 4 due to the tensile force during the test.

[0039] In this embodiment, a rectangular through groove (not shown in the figure) is opened on the test platform 1 along the left and right directions, and the bottom end of the friction rod extends into the through groove after passing through the motion platform. A horizontal driving device (not shown in the figure) is arranged on the test platform 1, and the horizontal driving device is connected to the motion platform 2, and is used to drive the motion platform 2 to move left and right. The horizontal driving device in this embodiment can adopt a servo motor to connect a lead screw (not shown in the figure), and the bottom of the motion platform 2 adopts two parallel linear rails (not shown in the figure) and sliders (not shown in the figure) on the linear rails that slide with them, which are slidably arranged on the test platform 1, and the lead screw is located between the two linear rails. The lead screw is driven to rotate by the servo motor, thereby driving the motion platform 2 to move horizontally along the left and right directions on the test platform 1. In this embodiment, if the distance between the upper surface of the test platform 1 and the motion platform 2 is large enough, the friction rod group 7 can be moved up and down normally without blocking the friction rod group 7, and the through groove can also be not opened on the test platform. Example 2

[0040] The present embodiment is a method for testing the wear resistance of carbon fiber, and adopts the testing device for the wear resistance of carbon fiber of Embodiment 1: first, fix the carbon fiber to be tested, pass the carbon fiber between two friction rods of all friction rod groups 7, and fix the two ends of the carbon fiber to the left fiber fixing clamp 3 and the right fiber fixing clamp 4 respectively.

[0041] Secondly, the wear resistance of the carbon fiber is tested. If only the transverse wear resistance of the carbon fiber needs to be tested, the servo motor drives the motion platform 2 to move horizontally on the test platform 1 so that the friction rod group 7 rubs the carbon fiber in the transverse direction, and the friction rod group 7 is kept not to move in the vertical direction; if only the longitudinal wear resistance of the carbon fiber needs to be tested, the vertical drive device 10 drives the moving block 8 to move vertically, so that the friction rod group 7 moves vertically synchronously with the vertical movement of the moving block 8, and the vertical movement of the friction rod group 7 rubs the carbon fiber in the longitudinal direction, and the motion platform 2 is kept not to move horizontally on the test platform 1; if the transverse and longitudinal wear resistance of the carbon fiber needs to be tested at the same time, while the servo motor drives the motion platform 2 to move horizontally, the vertical drive device 10 drives the moving block 8 to move vertically, and the horizontal and vertical movements of the friction rod group 7 produce transverse and longitudinal friction on the carbon fiber. In this embodiment, when testing the wear resistance of the carbon fiber, the lifting speed and number of the stainless steel thin rod can be adjusted to adjust the longitudinal friction speed and number of the fiber, and the left and right movement speed and number of the motion platform 2 can be used to condition the transverse friction speed and number of the fiber.

[0042] When the carbon fiber is worn off, the counterweight 5 pulls the left fiber fixing fixture 3 to hit the fixing block 12. At this time, the counter stops counting and records the number of friction times, thereby achieving a test of the maximum number of friction times.

[0043] The fixing of the carbon fiber to be tested in this embodiment is specifically as follows: one end of the carbon fiber to be tested is fixed on the right fiber fixing fixture 4, the other end of the carbon fiber to be tested is passed through the two friction rods of the friction rod group 7 in sequence, and then the left fiber fixing fixture 3 is pulled toward the right fiber fixing fixture 4, and the other end of the carbon fiber to be tested is fixed to the left fiber fixing fixture 3. The steps of clamping the carbon fiber are to first loosen the fastening bolts 20 on the upper clamp block 18, lift the upper clamp block 18 upward, place the end of the carbon fiber on the lower clamp block 19, and then fix the upper clamp block 18 on the lower clamp block 19 with the fastening bolts 20, and the end of the carbon fiber is clamped and fixed by the upper clamp block 18 and the lower clamp block 19.

[0044] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. A test device for the wear resistance of carbon fiber, characterized in that: The invention comprises a test platform (1), a motion platform (2), a left fiber fixing fixture (3), a right fiber fixing fixture (4), a counterweight (5) and a traction rope (6), wherein the left fiber fixing fixture (3) and the right fiber fixing fixture (4) are respectively arranged at the left and right ends of the top surface of the test platform (1), wherein the right fiber fixing fixture (4) is fixed on the test platform (1), and the left fiber fixing fixture (3) can move left and right on the test platform (1); one end of the traction rope (6) is connected to the left fiber fixing fixture (3), and the other end is bent downward from the edge of the test platform (1) and connected to the counterweight (5); the motion platform (2) is arranged on the test platform (1) and can move left and right on the test platform (1); and one or more friction rod groups (7) are arranged on the motion platform (2); the friction rod groups (7) move left and right synchronously with the left and right movement of the motion platform; and the friction rod groups (7) are arranged on the test platform (1). (7) passes through the motion platform (2) and can move vertically relative to the motion platform (2); a moving block (8) is arranged on the top of the friction rod group (7); a vertical support plate (9) is arranged on the motion platform (2); the moving block (8) is arranged on the vertical support plate (9) and forms a vertical moving pair with the vertical support plate (9); a vertical driving device (10) is arranged on the vertical support plate (9); the vertical driving device (10) is connected to the moving block (8) and is used to drive the moving block (8) to move up and down; the friction rod group (7) moves up and down synchronously with the up and down movement of the moving block (8); the carbon fiber to be tested passes through the friction rod group (7), and its two ends are respectively fixedly connected to the left fiber fixing fixture (3) and the right fiber fixing fixture (4), and are tightened by the counterweight (5); the horizontal movement and vertical movement of the friction rod group (7) can be used to perform transverse and longitudinal wear resistance tests on the carbon fiber, respectively.

2. The testing device for the wear resistance of carbon fiber according to claim 1, characterized in that: The test platform (1) also includes a fixed block (12), the fixed block (12) being fixed on the test platform (1), the traction rope (6) being fixed to the left fiber fixing fixture (3) and then passing through the fixed block (12) and then connected to the counterweight (5), a guide rod (13) being arranged on the fixed block (12), the guide rod (13) passing through the left fiber fixing fixture (3), the left fiber fixing fixture (3) being movable along the length direction of the guide rod (13), a counter being arranged on the test platform (1) for counting the number of times the friction rod group (7) moves horizontally and / or vertically, and after the carbon fiber is worn off, the counterweight (5) pulls the left fiber fixing fixture (3) to hit the fixed block (12) via the traction rope (6), and the counter stops counting.

3. The testing device for wear resistance of carbon fiber according to claim 2, characterized in that: There are two guide rods (13), the two guide rods (13) are parallel and one end of each guide rod is fixedly connected to the fixing block (12), the two guide rods (13) both pass through the left fiber fixing clamp (3), and in a use state, the end of the carbon fiber is fixed between the two guide rods (13).

4. The testing device for wear resistance of carbon fiber according to claim 1, characterized in that: A horizontal support plate (14) is fixed on the top of the vertical support plate (9), one or more guide rods (15) are arranged between the horizontal support plate (14) and the motion platform (2), the moving block (8) is slidably arranged on the guide rods (15), and the vertical drive device (10) is arranged on the horizontal support plate (14).

5. The testing device for the wear resistance of carbon fiber according to claim 4, characterized in that: The vertical drive device (10) is a drive motor, the output shaft of which passes downward through the horizontal support plate (14) and is connected to a screw rod (16). The bottom end of the screw rod (16) is rotatably connected to the motion platform (2). The screw rod (16) passes through the moving block (8) and is threadably engaged with the moving block (8). The drive motor drives the screw rod (16) to rotate, thereby driving the moving block (8) to move vertically.

6. The testing device for the wear resistance of carbon fiber according to claim 5, characterized in that: A connecting plate (17) is fixed to a side of the moving block (8) away from the vertical support plate (9), the connecting plate (17) is fixedly connected to the moving block (8), and the top end of the friction rod group (7) is fixedly connected to the connecting plate (17).

7. The testing device for wear resistance of carbon fiber according to claim 1, characterized in that: The left fiber fixing clamp (3) and the right fiber fixing clamp (4) have the same structure, both comprising an upper clamp block (18) and a lower clamp block (19); a fastening bolt (20) is provided on the upper clamp block (18); the fastening bolt (20) passes through the upper clamp block (18) and is threadably engaged with the lower clamp block (19); tightening the fastening bolt (20) is used to clamp the carbon fiber between the upper clamp block (18) and the lower clamp block (19); the lower clamp block (19) of the left fiber fixing clamp (3) can move on the test platform (1); and the lower clamp block (19) of the right fiber fixing clamp (4) is fixed on the test platform (1).

8. The testing device for wear resistance of carbon fiber according to claim 1, characterized in that: A through slot is provided on the upper side of the test platform (1) in the left-right direction, and the bottom end of the friction rod extends into the through slot. A horizontal driving device is provided in the test platform (1), and the horizontal driving device is connected to the motion platform (2) and is used to drive the motion platform (2) to move left and right.

9. A method for testing the wear resistance of carbon fiber, characterized in that: A test device for the wear resistance of carbon fiber according to any one of claims 1 to 8; First, fix the carbon fiber to be tested, pass the carbon fiber through all the friction rod groups (7), and fix the two ends of the carbon fiber to the left fiber fixing fixture (3) and the right fiber fixing fixture (4) respectively; Secondly, the wear resistance of the carbon fiber is tested. If only the transverse wear resistance of the carbon fiber needs to be tested, the motion platform (2) is moved horizontally on the test platform (1) to make the friction rod group (7) rub the carbon fiber transversely. If only the longitudinal wear resistance of the carbon fiber needs to be tested, the moving block (8) is moved vertically to make the friction rod group (7) rub the carbon fiber longitudinally. If both the transverse and longitudinal wear resistance of the carbon fiber need to be tested simultaneously, the motion platform (2) is moved horizontally while the moving block (8) is moved vertically. When the carbon fiber is worn off, the counterweight (5) pulls the left fiber fixing fixture (3) to hit the fixing block (12), and the counter stops counting and records the number of frictions.

10. The method for testing the wear resistance of carbon fiber according to claim 9, characterized in that: Fixing the carbon fiber to be tested comprises fixing one end of the carbon fiber to be tested on the right fiber fixing fixture (4), passing the other end of the carbon fiber to be tested through the friction rod group (7) in sequence, then pulling the left fiber fixing fixture (3) toward the right fiber fixing fixture (4), and fixing the other end of the carbon fiber to be tested on the left fiber fixing fixture (3).

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