Processing clamping device and process method of carbon fiber wound pipe

Abstract

The application provides a processing clamping device for carbon fiber winding pipe, which fixes the carbon fiber winding pipe through a chuck, and realizes winding processing of the carbon fiber winding outer pipe through a rotating end plate and a winding shaft. The processing method of the carbon fiber winding pipe mainly comprises the following steps: introducing carbon fiber tows into a tension adjusting device to adjust the tension; introducing the carbon fiber tows into the tension adjusting device to adjust the tension; fixing a core mold on a winding machine to perform winding, to obtain a carbon fiber winding inner pipe; and then performing heating and curing, and finally completing the processing of the carbon fiber winding outer pipe according to the above process. The method of the application introduces winding angle setting and tension adjustment of the carbon fiber tows, and ensures the close degree of the carbon fiber tows and the surface of the core mold. The device of the application solves the problems of loosening and deformation in the reprocessing of the carbon fiber winding outer pipe, and ensures the close degree of the carbon fiber winding outer pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon fiber pipe forming, and particularly provides a processing clamping device and process method for carbon fiber winding pipe. BACKGROUND

[0002] The carbon fiber pipe is also called carbon fiber pipe, and is also called carbon pipe. The carbon fiber pipe has excellent corrosion resistance, environmental resistance, temperature influence and other characteristics, and has high ring stiffness, high strength, strong impact resistance, low density, high modulus and other excellent performances. Therefore, the carbon fiber pipe is widely used in devices and fields such as automobiles, model airplanes, lamp supports, PC device rotating shafts, etching machines, medical devices, sports equipment and the like.

[0003] The carbon fiber pipe is mainly formed by winding carbon fiber tows or by laminating and molding carbon fiber cloth. The laminating and molding technology is relatively simple and easy to implement. However, the carbon fiber pipe formed by laminating and molding carbon fiber cloth has poor ring stiffness and is more easily deformed under external force. The deformation amount is larger during the heating and curing process, and the size precision is lower. The carbon fiber winding pipe formed by winding carbon fiber tows also has the following difficulties in the production process:

[0004] 1. During winding, the carbon fiber tows are not closely attached to the surface of the core mold, which often causes the surface of the carbon fiber winding pipe to be uneven after forming, the appearance quality is poor, and the production efficiency is affected.

[0005] 2. When an outer pipe needs to be wound outside several carbon fiber winding pipes, the internal carbon fiber winding pipes and the core mold are easily loose or deformed, which causes the carbon fiber winding pipes to be not closely attached to the outer pipe. SUMMARY

[0006] To solve the above problems, the present application provides a processing process for carbon fiber winding pipe, and designs a processing clamping device for carbon fiber winding pipe.

[0007] The processing clamping device for carbon fiber winding pipe provided by the present application comprises: a chuck, two rotating end plates, positioning bolts and winding shafts.

[0008] The chucks are two groups and are used for fixing on both sides of the carbon fiber winding pipe. One end of the chuck for fixing the carbon fiber winding pipe is a hollow cylinder, and the other end of the chuck is a regular hexagonal prism. The hollow cylinder is the largest cylinder that can be accommodated in the regular hexagonal prism. A threaded hole is formed in the center of the regular hexagonal prism, and a corresponding hole is also formed in the rotating end plate. The chuck is fixed on the rotating end plate through the positioning bolt. The center of the rotating end plate is connected with the winding shaft. The winding shafts on both sides are fixed on the winding machine, and N outer pipes of the carbon fiber winding pipe can be wound and processed, wherein N is greater than or equal to 2.

[0009] The position distribution of the corresponding holes on the rotating end plate is designed according to the production requirement, so that the outer pipe of the carbon fiber winding pipe with different arrangement forms can be wound and processed.

[0010] A processing method of a carbon fiber winding pipe comprises the following steps:

[0011] S1, the carbon fiber tows are introduced into a tension adjusting device to adjust the tension of the carbon fiber tows, so that the carbon fiber tows are tightly attached to the core mold during winding;

[0012] S2, the carbon fiber tows are introduced into a resin infiltration device, and then the winding angle of the carbon fiber tows is adjusted through an angle adjusting device;

[0013] S3, the core mold is fixed on a winding machine, the core mold rotates to drive the carbon fiber tows to wind, so that the carbon fiber winding inner pipe is obtained; and then the carbon fiber winding inner pipe is heated and solidified;

[0014] S4, the carbon fiber winding inner pipe is taken out from the core mold;

[0015] S5, the M carbon fiber winding inner pipes are side-glued, and the M carbon fiber winding inner pipes are clamped and fixed by using the processing clamping device of the carbon fiber winding pipe as claimed in claim 1, and the processing process of S1-S3 is repeated to complete the processing process of the carbon fiber winding outer pipe.

[0016] Preferably, the winding angle is set to ±30°, ±45°, ±60° or ±90° with respect to the axial direction of the carbon fiber winding inner pipe.

[0017] Compared with the prior art, the present application can achieve the following beneficial effects:

[0018] The processing clamping device of the carbon fiber winding pipe provided by the present application solves the problems of loosening and deformation in the reprocessing of the carbon fiber winding outer pipe, ensures the tightness of the carbon fiber winding outer pipe, realizes the winding of the carbon fiber on the outside of several carbon fiber winding pipes, and can be applied on a large scale in actual production.

[0019] The processing method of the carbon fiber winding pipe provided by the present application introduces the setting of the winding angle of the carbon fiber tows and the adjustment of the tension, ensures the tightness of the carbon fiber tows and the surface of the core mold, and can process the carbon fiber winding pipe with uneven thickness through the angle adjusting device to meet special requirements. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural diagram of the processing clamping device of the carbon fiber winding pipe provided according to an embodiment of the present application;

[0021] Figure 2 is a structural diagram of the chuck according to an embodiment of the present application;

[0022] Figure 3 is a flow chart of a processing method of a carbon fiber winding pipe according to an embodiment of the present application;

[0023] Figure 4 is a processing diagram of a carbon fiber winding inner pipe according to an embodiment of the present application;

[0024] Figure 5 is a clamping processing diagram of a carbon fiber winding outer pipe according to an embodiment of the present application;

[0025] Figure 6 is a final effect diagram of a carbon fiber winding pipe according to an embodiment of the present application.

[0026] The reference signs in the drawings include:

[0027] Chuck 1, hollow cylinder 11, regular hexagonal prism 12, threaded hole 13, rotating end plate 2, positioning bolt 3, winding shaft 4;

[0028] Anti-collision beam 5, carbon fiber winding inner pipe 51, carbon fiber winding outer pipe 52, carbon fiber tows rod 6, tension adjusting device 7, resin infiltration device 8, angle adjusting device 9, core mold 10. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the present application will be described with reference to the accompanying drawings. In the following description, the same modules are denoted by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

[0030] In order to make the objects, technical solutions, and advantages of the present application clearer, further detailed descriptions will be given to the present application in combination with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and do not constitute a limitation on the present application.

[0031] Figure 1 The structure of a processing clamping device of a carbon fiber winding pipe according to an embodiment of the present application is shown.

[0032] Figure 2 The structure of a chuck according to an embodiment of the present application is shown.

[0033] As shown in Figure 1 and Figure 2 , for the carbon fiber winding process on the outside of a plurality of carbon fiber winding pipes, an embodiment of the present application provides a processing clamping device of a carbon fiber winding pipe for clamping two ends of the carbon fiber winding pipe, specifically including a chuck 1, a rotating end plate 2, a positioning bolt 3, and a winding shaft 4, wherein:

[0034] The two clamping heads 1 are a group, used for clamping two ends of the same carbon fiber winding pipe, which is a prefabricated product of the core mold. One end of the clamping head 1 is a hollow cylinder 11, and the carbon fiber winding pipe is sleeved outside the hollow cylinder 11. The carbon fiber winding pipe is fixed by adjusting the spatial position of the group of clamping heads 1. The other end of the clamping head 1 is a regular hexagonal prism 12. At the connection between the hollow cylinder 11 and the regular hexagonal prism 12, the edges of the regular hexagonal prism 12 are tangent lines of the cross section of the hollow cylinder 11. The hollow cylinder 11 is the largest cylinder that can be accommodated in the regular hexagonal prism 12. The regular hexagonal prisms 12 can be clamped to each other to prevent the carbon fiber winding pipe from rotating. A threaded hole 13 is formed in the center of the regular hexagonal prism 12. A corresponding hole is also formed in the rotating end plate 2. The rotating end plate 2 is used to clamp and block the carbon fiber winding pipe to prevent the carbon fiber winding pipe from moving left and right. The clamping head 1 is fixed on the rotating end plate 2 by the positioning bolt 3. The center of the rotating end plate 2 is connected with the winding shaft 4. The winding shafts 4 on both sides are installed on the rotating mechanism of the winding machine. The winding machine is started to wind and process the outer pipes of multiple carbon fiber winding pipes. According to the structure and arrangement needs of the multiple carbon fiber winding pipes, the rotating end plate 2 with corresponding holes of different forms is selected, and different numbers of clamping heads 1 are used to clamp the multiple carbon fiber winding pipes according to the needs, so that the winding and processing of the outer pipes can be realized.

[0035] The device of the present application solves the problems of loosening and deformation in the reprocessing of carbon fiber winding outer pipes, ensures the close degree of the carbon fiber winding outer pipes, and realizes the winding of the carbon fibers outside several carbon fiber winding pipes. The arrangement mode of the inner carbon fiber winding pipes can be changed by changing the rotating end plate 2.

[0036] Figure 3 The flowchart of the processing method of the carbon fiber winding pipe is shown.

[0037] As shown in Figure 3 , in order to solve the difficulty of winding carbon fiber tows to form carbon fiber winding pipes in the production process, the processing method of the carbon fiber winding pipe is introduced in combination with the production of a carbon fiber automobile anti-collision beam.

[0038] Figure 4 The processing process of the carbon fiber winding inner pipe is shown.

[0039] Figure 5 The clamping and processing process of the carbon fiber winding outer pipe is shown.

[0040] Figure 6 The finished product of the carbon fiber winding pipe is shown.

[0041] As shown in Figure 4 , Figure 5 and Figure 6As shown, the carbon fiber automobile anti-collision beam includes an aluminum alloy energy absorption box structure, an anti-collision beam 5 and an energy absorption box base. The anti-collision beam 5 is a carbon fiber winding pipe. The anti-collision beam is composed of two different section, pipe diameter and wall thickness of the cylindrical carbon fiber winding inner pipe 51 and the carbon fiber winding outer pipe 52. The carbon fiber winding inner pipe 51 is arranged in a certain structure. The carbon fiber winding outer pipe 52 wraps the plurality of carbon fiber winding inner pipes 51 into one, and together constitutes the anti-collision beam 5.

[0042] The processing process of the carbon fiber winding pipe includes the following steps:

[0043] First, a plurality of carbon fiber winding inner pipes 51 need to be processed:

[0044] S1, fix the carbon fiber tows bar 6, and guide the carbon fiber tows into the tension adjusting device 7 through the guide roller. The tension adjusting device 7 can measure the tension of the carbon fiber tows. This function can be realized by a tension sensor and the like, which is prior art and will not be described here. The surface tension of the carbon fiber tows is adjusted according to the measured tension of the carbon fiber tows, so that the carbon fiber tows adhere to the core mold 10 during winding.

[0045] S2, the carbon fiber tows output from the tension adjusting device 7 are guided into the resin infiltration device 8, and the resin is fully coated on the carbon fiber tows. A certain proportion of release agent can be mixed in the resin infiltration device 8 to facilitate the separation of the carbon fiber winding inner pipe 51 and the core mold 10 in the later stage. Then the winding angle of the carbon fiber tows is adjusted through the angle adjusting device 9. The winding angle is set to ±30°, ±45°, ±60° or ±90° relative to the axial direction of the carbon fiber winding inner pipe. According to actual test, the above winding angle is beneficial to the winding of the carbon fiber tows and the enhancement of the ring stiffness and impact resistance of the carbon fiber winding inner pipe 51. The angle adjusting device 9 can ensure that the winding angle remains unchanged by adjusting.

[0046] S3, the carbon fiber tows are wound on the core mold 10, and the core mold 10 is fixed on the rotating device of the winding machine. The core mold 10 rotates with the winding machine, and the rotation of the core mold 10 drives the carbon fiber tows to wind, so that the carbon fiber winding inner pipe 51 can be obtained. After winding and forming, the excess part is cut off and heated and solidified to shape.

[0047] S4, the carbon fiber winding inner pipe 51 is taken out of the core mold 10, and the processing of the carbon fiber winding inner pipe 51 is completed.

[0048] The processing process of the carbon fiber winding outer pipe 52:

[0049] S5. According to the structural design requirements of the anti-collision beam 5, multiple carbon fiber wound inner tubes 51 are bonded together with adhesive to fix their relative positions, assembling them into a pre-formed structure before the processing of the carbon fiber wound outer tube 52. The two ends of the pre-formed structure formed by the multiple carbon fiber wound inner tubes 51 are clamped and fixed using the processing clamping device of the carbon fiber wound tube, and placed on the rotating mechanism of the winding machine to perform the winding process of the carbon fiber wound outer tube 52, that is, repeating the processing process of S1 to S3 to complete the processing of the carbon fiber wound outer tube 52.

[0050] During the process of carbon fiber winding outer tube 52, the thickness of the carbon fiber bundle in the middle part of the carbon fiber winding outer tube 52 can be slightly greater than that on both sides by parameter control. This enhances the ability of the middle structure of the carbon fiber winding outer tube 52 to resist external forces, so that the overall anti-collision beam has a strong ability to resist external forces when it is subjected to collisions in different parts.

[0051] The processing method of carbon fiber wound tube provided in this embodiment of the invention has been widely used in actual production with extremely high yield. Furthermore, the carbon fiber wound inner tube 51 and carbon fiber wound outer tube 52 are not limited to cylindrical shapes. Other polygonal structures, such as hexagonal prisms and triangular prisms, can be adopted according to design and performance analysis requirements.

[0052] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0053] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A processing method for carbon fiber wound tubes, characterized in that, Includes the following steps: S1. Introduce the carbon fiber bundle into the tension adjustment device, adjust the tension of the carbon fiber bundle to ensure that the carbon fiber bundle is in close contact with the mandrel during the winding process. S2. The carbon fiber bundle is introduced into the resin impregnation device, and then the winding angle of the carbon fiber bundle is adjusted by the angle adjustment device; the winding angle is set to ±30°, ±45°, ±60° or ±90° relative to the axial direction of the carbon fiber winding inner tube. S3. Fix the mandrel on the winding machine, rotate the mandrel to drive the carbon fiber filament bundle to wind, and obtain the carbon fiber wound inner tube; then heat and cure the carbon fiber wound inner tube. S4. Remove the carbon fiber wound inner tube from the mandrel; S5. The M carbon fiber wound inner tubes are side-bonded, and the M carbon fiber wound inner tubes are clamped and fixed using the carbon fiber wound tube processing clamping device. The processing process of S1 to S3 is repeated to complete the processing process of the carbon fiber wound outer tube. The processing and clamping device for carbon fiber wound tubes includes: a chuck, two rotating end plates, positioning bolts, and a winding shaft; The clamps are used in pairs to fix the two sides of the carbon fiber wound tube. The clamp is used to fix one end of the carbon fiber winding tube as a hollow cylinder, and the other end of the clamp is a regular hexagonal prism. The hollow cylinder is the largest cylinder that can be accommodated in the regular hexagonal prism. A threaded hole is opened at the center of the regular hexagonal prism, and a corresponding hole is also opened on the rotating end plate. The clamp is fixed to the rotating end plate by the positioning bolt. The winding shaft is connected to the center of the rotating end plate. By fixing the winding shafts on both sides to the winding machine, the outer tubes of N carbon fiber winding tubes can be wound and processed, where N is greater than or equal to 2.

2. The processing method for carbon fiber wound tubes as described in claim 1, characterized in that, By designing the position distribution of the corresponding holes on the rotating end plate according to production requirements, the outer tube of the carbon fiber wound tube with different arrangements can be wound and processed.

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