Resin glue draining device for carbon fiber tensile sample strip

Abstract

The utility model discloses a resin glue draining device of a carbon fiber tensile spline, which comprises a motor support and a bearing which are fixedly arranged with a device fixing frame (not drawn), a variable frequency motor is fixedly arranged on one side of the motor support, and a driving shaft is fixedly arranged in the middle of the bearing in a penetrating manner. The top of the driving shaft is in transmission connection with the output end of a variable frequency motor, a lifting pull rod is slidably connected to the middle of the driving shaft in a penetrating mode, a linkage pin is slidably connected to the bottom of the peripheral face of the driving shaft in a penetrating mode, a gum dipping groove is formed under the lifting pull rod, and a working clamp is fixedly installed at the bottom of the lifting pull rod. And a wire winding frame is clamped and fixed in the working clamp, and a first positioning hole is formed in the middle of the lifting pull rod. The problem of poor manual control consistency is fundamentally solved, the consistency of fiber tensile sample strip resin content control is ensured, and the accuracy and stability of test data are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material property characterization testing, in particular to a resin draining device for a carbon fiber tensile spline. Background Technique

[0002] Carbon fiber is a new type of inorganic polymer material with a carbon content of more than 90%. It has comprehensive excellent properties such as light weight, high strength, high modulus, corrosion resistance, low expansion, fatigue resistance, erosion resistance, self-lubrication, and good compatibility with organisms, etc. Therefore, it is widely used in the fields of aviation, aerospace, leisure sports, and civil use.

[0003] The main methods for evaluating the tensile properties of carbon fiber are the single-filament tensile method and the multifilament tensile method. Since the single-filament tensile method measures the mechanical properties of a single fiber, the data obtained has a large discreteness and it is difficult to reflect the mechanical properties of its composite materials. The multifilament tensile method is to test the tensile properties of a composite material formed by impregnating a bundle of carbon fibers with resin and then curing. The data obtained in this way has a smaller discreteness and can better reflect the mechanical properties of its composite materials. Therefore, it is more widely used and the research in this aspect at home and abroad is relatively more sufficient.

[0004] Both GB / T 3362-2017 "Test Method for Tensile Properties of Carbon Fiber Multifilaments" and GB / T 26749-2011 "Determination of Tensile Properties of Carbon Fiber Impregnated Yarn", as well as the American Society for Testing and Materials standard ASTM D4018 "Standard Test Methods for Properties of Continuous Filament Carbon and Graphite Fiber Tows", stipulate the resin content of the tensile spline formed after carbon fiber is impregnated with resin and cured at high temperature. The stability of the resin content of the fiber spline after impregnation is directly related to the accuracy of mechanical property characterization. The larger the tow, the more difficult it is to control the resin content of the spline after impregnation manually. Manually controlling the resin content of the fiber after impregnation is not only not conducive to the characterization of the tensile strength of the fiber, but also increases the coefficient of variation of the tensile strength.

[0005] At present, most domestic carbon fiber manufacturers mostly use manual winding to make samples, then put them into the glue solution for impregnation, and use absorbent paper to adsorb the glue solution on the surface of the impregnated fiber. This method often introduces too much subjective human judgment and cannot ensure the consistency of the glue solution between tows during the adsorption process. Moreover, the resin content between sample batches will also vary greatly due to human reasons.

[0006]

[0007] ​With the increasing application fields of various types of carbon fibers, in order to meet the requirements for the characterization and evaluation of the mechanical properties of carbon fibers, ensure the consistency and stability of the resin content control of the splines after the fibers are impregnated with resin, and overcome the drawbacks of manual control, there is an urgent need to design a device for draining glue from carbon fibers impregnated with resin.

[0008] For this reason, we propose a device for draining resin from carbon fiber tensile splines. Utility Model Content

[0009] The purpose of the present utility model is to provide a device for draining resin from carbon fiber tensile splines to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above object, the present utility model provides the following technical solution: A device for draining resin from carbon fiber tensile splines, including a motor bracket and a bearing fixedly installed on a device fixing bracket (not shown). A variable-frequency motor is fixedly installed on one side of the motor bracket. A driving shaft is fixedly installed through the middle of the bearing. The top of the driving shaft is in transmission connection with the output end of the variable-frequency motor. A top lifting pull rod is slidably connected through the middle of the driving shaft. A linkage pin is slidably connected through the bottom of the outer peripheral surface of the driving shaft. An impregnation tank is arranged directly below the lifting pull rod. A working fixture is fixedly installed at the bottom of the lifting pull rod. A wire winding frame is clamped and fixed inside the working fixture. A first positioning hole is opened in the middle of the lifting pull rod. A second positioning hole is opened in the middle of the lifting pull rod below the first positioning hole. A third positioning hole is opened in the middle of the lifting pull rod below the second positioning hole.

[0011] Optionally, a lifting ring is arranged at the top of the lifting pull rod. Impregnation glue liquid is arranged inside the impregnation tank. The distance from the liquid level of the impregnation glue liquid to the top of the impregnation tank is greater than the height of the wire winding frame.

[0012] Optionally, the diameters of the first positioning hole, the second positioning hole, and the third positioning hole are the same, and the diameters of the first positioning hole, the second positioning hole, and the third positioning hole are the same as the diameter of the linkage pin.

[0013] Optionally, a belt pulley is fixedly installed at the output end of the variable-frequency motor. Another belt pulley is fixedly installed at the top of the driving shaft. The two belt pulleys are in transmission connection through a V-belt.

[0014] Optionally, when the linkage pin is inserted into the first positioning hole, the working fixture is located below the liquid level of the impregnation glue liquid.

[0015] Optionally, when the linkage pin is inserted into the second positioning hole, the top of the working fixture is lower than the top of the impregnation tank, and the bottom of the wire winding frame is located above the liquid level of the impregnation glue liquid.

[0016] Optionally, when the linkage pin is inserted into the third positioning hole, the bottom of the wire winding frame is located above the dipping tank.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The resin draining device for the carbon fiber tensile spline can realize the integrated control of impregnation and resin draining. It can not only ensure the uniformity of the resin content of the same fiber bundle spline on the wire winding frame, but also ensure the consistency of the resin content of different fiber splines on the same wire winding frame, and can also ensure the consistency of the resin content of fiber splines on different wire winding frames, thereby ensuring the stability and consistency of spline preparation. Moreover, the device is simple to operate and has a low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of carbon fiber impregnating resin of the resin draining device for a carbon fiber tensile spline of the present utility model;

[0020] Figure 2 Schematic diagram of resin draining of the carbon fiber winding frame impregnating resin of the resin draining device for a carbon fiber tensile spline of the present utility model;

[0021] Figure 3 Schematic diagram of the completion of carbon fiber resin draining of the resin draining device for a carbon fiber tensile spline of the present utility model;

[0022] Figure 4 Schematic diagram of the lifting pull rod driven by a variable frequency motor to rotate in the resin draining device for a carbon fiber tensile spline of the present utility model.

[0023] In the figure: 1, dipping tank; 2, wire winding frame; 3, lifting pull rod; 4, impregnating glue; 5, linkage pin; 6, first positioning hole; 7, second positioning hole; 8, third positioning hole; 9, lifting ring; 10, working fixture; 11, variable frequency motor; 12, V-belt; 13, bearing; 14, driving shaft; 15, motor bracket; 16, pulley. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 to 4, the utility model provides a resin draining device for carbon fiber tensile splines, which includes a motor bracket 15 and a bearing 13 fixedly installed on a device fixing bracket (not shown). A variable-frequency motor 11 is fixedly installed on one side of the motor bracket 15. A driving shaft 14 is fixedly installed through the middle of the bearing 13. The top of the driving shaft 14 is in transmission connection with the output end of the variable-frequency motor 11. A pulley 16 is fixedly installed at the output end of the variable-frequency motor 11. Another pulley 16 is fixedly installed at the top of the driving shaft 14. The two pulleys 16 are in transmission connection through a V-belt 12. A top lifting pull rod 3 is slidably connected through the middle of the driving shaft 14. A linkage pin 5 is slidably connected through the bottom of the outer peripheral surface of the driving shaft 14. An impregnation tank 1 is arranged directly below the lifting pull rod 3. A working fixture 10 is fixedly installed at the bottom of the lifting pull rod 3. A wire winding frame 2 is clamped and fixed inside the working fixture 10. A first positioning hole 6 is opened in the middle of the lifting pull rod 3. A second positioning hole 7 is opened in the middle of the lifting pull rod 3 below the first positioning hole 6. A third positioning hole 8 is opened in the middle of the lifting pull rod 3 below the second positioning hole 7. The diameters of the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8 are the same. The diameters of the first positioning hole 6, the second positioning hole 7 and the third positioning hole 8 are the same as the diameter of the linkage pin 5. A lifting ring 9 is arranged at the top of the lifting pull rod 3. An impregnating glue solution 4 is arranged inside the impregnation tank 1. The distance from the liquid level of the impregnating glue solution 4 to the top of the impregnation tank 1 is greater than the height of the wire winding frame 2. When the linkage pin 5 is inserted into the first positioning hole 6, the working fixture 10 is located below the liquid level of the impregnating glue solution 4. When the linkage pin 5 is inserted into the second positioning hole 7, the top of the working fixture 10 is lower than the top of the impregnation tank 1, and the bottom of the wire winding frame 2 is located above the liquid level of the impregnating glue solution 4. When the linkage pin 5 is inserted into the third positioning hole 8, the bottom of the wire winding frame 2 is located above the impregnation tank 1, realizing the integrated control of impregnation and draining. It can not only ensure the uniformity of the resin content of the same fiber bundle spline on the wire winding frame 2, but also ensure the consistency of the resin content of different fiber splines on the same wire winding frame 2, and can also ensure the consistency of the resin content of the fiber splines on different wire winding frames 2, thus ensuring the stability and consistency of spline preparation. And this device is simple to operate and has a low manufacturing cost.

[0026] Working principle:

[0027] First, wind fibers around the wire winding frame 2 at equal intervals and install them on the working fixture 10 at the end of the lifting rod 3. Remove the linkage pin 5, hold the lifting ring 9 by hand, lower the lifting rod 3 with the wire winding frame 2 at one end into the dipping tank 1 filled with dipping adhesive 4, and fix the lifting rod 3 to the first positioning hole 6 with the linkage pin 5. At this time, it should be ensured that the wire winding frame 2 is fully immersed in the dipping adhesive 4; after reaching the specified dipping time, remove the linkage pin 5, hold the lifting ring 9 by hand, raise the lifting rod 3 upward to the second positioning hole 7, and fix it with the linkage pin 5; set the rotation speed of the variable-frequency motor 11, and turn on the switch of the variable-frequency motor 11. At this time, the variable-frequency motor 11 drives the V-belt 12 and the connected bearing 13 to rotate through the pulley 16. Since the bearing 13 is fixed to the lifting rod 3, the rotation of the bearing 13 drives the lifting rod 3 and the wire winding frame 2 at the end to rotate at a constant speed. Under the action of centrifugal force, the excess dipping adhesive 4 is drained off to achieve the purpose of draining the adhesive; after the draining of the adhesive is completed, remove the linkage pin 5, hold the lifting ring 9 by hand, raise the lifting rod 3 upward to the third positioning hole 8, and fix it with the linkage pin 5. Open the working fixture 10, remove the wire winding frame 2 after draining the adhesive, and place it in a high-temperature oven for curing.

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

Claims

1. A resin-leaching device for carbon fiber tensile splines, comprising a motor bracket (15) and a bearing (13) fixedly mounted on a device fixing frame, characterized in that: A variable frequency motor (11) is fixedly installed on one side of the motor bracket (15), a driving shaft (14) is fixedly installed through the middle of the bearing (13), the top of the driving shaft (14) is drivingly connected to the output end of the variable frequency motor (11), the middle of the driving shaft (14) is slidably connected with an upper lifting rod (3), the bottom of the outer peripheral surface of the driving shaft (14) is slidably connected with a linkage pin (5), a glue dipping tank (1) is arranged directly below the lifting rod (3), a working clamp (10) is fixedly installed at the bottom of the lifting rod (3), a wire winding frame (2) is clamped and fixed inside the working clamp (10), a first positioning hole (6) is opened in the middle of the lifting rod (3), a second positioning hole (7) located below the first positioning hole (6) is opened in the middle of the lifting rod (3), and a third positioning hole (8) located below the second positioning hole (7) is opened in the middle of the lifting rod (3).

2. A resin leaching device for carbon fiber tensile strips according to claim 1, characterized in that: A lifting ring (9) is arranged at the top of the lifting rod (3), and an impregnation glue solution (4) is arranged inside the impregnation glue tank (1). The distance from the liquid surface of the impregnation glue solution (4) to the top of the impregnation glue tank (1) is greater than the height of the wire winding frame (2).

3. A resin leaching device for carbon fiber tensile spline according to claim 1, characterized in that: The diameters of the first positioning hole (6), the second positioning hole (7) and the third positioning hole (8) are the same, and the diameters of the first positioning hole (6), the second positioning hole (7) and the third positioning hole (8) are the same as the diameter of the linkage pin (5).

4. A resin leaching device for carbon fiber tensile strips according to claim 1, characterized in that: A pulley (16) is fixedly mounted on the output end of the variable frequency motor (11), another pulley (16) is fixedly mounted on the top of the driving shaft (14), and the two pulleys (16) are connected in transmission via a V-belt (12).

5. A resin leaching device for carbon fiber tensile strips according to claim 2, characterized in that: When the linkage pin (5) is plugged into the first positioning hole (6), the working clamp (10) is located below the liquid level of the impregnating glue solution (4).

6. A resin leaching device for carbon fiber tensile strips according to claim 5, characterized in that: When the linkage pin (5) is plugged into the second positioning hole (7), the top of the working clamp (10) is lower than the top of the dipping tank (1), and the bottom of the wire winding frame (2) is located above the liquid level of the dipping glue (4).

7. A resin leaching device for carbon fiber tensile strips according to claim 6, characterized in that: When the linkage pin (5) is plugged into the third positioning hole (8), the bottom of the wire winding frame (2) is located above the glue dipping tank (1).

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