A forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process

Abstract

The present invention relates to the technical field of composite material mold design, and in particular to a forming mold for preparing a carbon fiber tube with metal embedded parts based on a winding process, comprising a metal embedded part, a thin-walled aluminum tube, a center rod, a limit plate and a locking rod; the metal embedded part, the thin-walled aluminum tube and the limit plate are hollow inside to accommodate the center rod; a plurality of thin-walled aluminum tubes are provided, and adjacent thin-walled aluminum tubes are connected by metal embedded parts to form a mold body; the center rod extends out of the mold body, the limit plates are provided at the two ends of the mold body and sleeved on the outside of the center rod, the locking rod is provided at the two ends of the center rod, is threadedly connected to the center rod, and presses the limit plates; wherein annular grooves are provided at intervals on the outside of the metal embedded parts. The forming mold realizes the embedding of metal parts in local positions during the molding of the carbon fiber tube, and the prepared carbon fiber tube is light in weight and simple in structure.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material mold design, in particular to a forming mold for preparing a carbon fiber tube with a metal embedded part based on a winding process. Background Art

[0002] In recent years, with the continuous expansion of carbon fiber material applications, operating conditions and requirements have become increasingly demanding, further increasing the demand for carbon fiber composite products containing metal embedded parts. Due to the anisotropy of carbon fiber composites and the special manufacturing process, the matrix after molding is not suitable for mechanical processing, otherwise it will destroy the continuity of the matrix fibers and affect the mechanical properties. To ensure the installation accuracy and performance requirements of carbon fiber composite components, metal embedded parts are usually pre-placed on the carbon fiber composite matrix. The embedded parts are processed to ensure the component accuracy and performance requirements.

[0003] Currently, most carbon fiber products with embedded metal parts are non-rotating. These are formed using a prepreg layup method, where the metal parts are placed in prepreg-preserved spaces and then placed into a composite mold for curing under heat and pressure. This method has low production efficiency and high costs, making it unsuitable for mass production.

[0004] Therefore, it is very important to provide a molding die that can solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned issues, the present invention provides a forming die for producing carbon fiber tubes with embedded metal parts based on a winding process. This invention achieves the goal of embedding metal parts in localized locations during the forming of the carbon fiber tube. The carbon fiber tube produced using the forming die provided by the present invention is lightweight, simple in structure, and accurately positions the embedded metal parts. Furthermore, the embedded metal parts can be assembled with other components.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a forming die for preparing a carbon fiber tube with a metal embedded part based on a winding process, comprising a metal embedded part, a thin-walled aluminum tube, a center rod, a limit plate and a locking rod;

[0008] The metal embedded parts, thin-walled aluminum tubes and limit plates are hollow inside to accommodate the center rod;

[0009] A plurality of thin-walled aluminum tubes are provided, and adjacent thin-walled aluminum tubes are connected by metal embedded parts to form a mold body (with high straightness); the center rod is located in the mold body and extends out of the mold body; the limit plates are provided at both ends of the mold body and sleeved on the outside of the center rod; the locking rods are provided at both ends of the center rod and are threadedly connected to the center rod to tighten the limit plates;

[0010] Among them, annular grooves are arranged at intervals on the outside of the metal embedded part (when carbon fiber winding is performed, the carbon fiber can be embedded in the annular groove, and after solidification and molding, axial displacement between the metal embedded part and the carbon fiber layer can be avoided).

[0011] In one embodiment of the present invention, the metal embedded part includes a ring-shaped embedded part body and first positioning steps provided at two ends of the embedded part body;

[0012] The embedded part body is connected to the thin-walled aluminum tube via a first positioning step;

[0013] Annular grooves are arranged at intervals on the outer surface of the embedded component body.

[0014] In one embodiment of the present invention, the outer diameter of the first positioning step is adapted to the inner diameter of the thin-walled aluminum tube;

[0015] The inner diameter of the first positioning step is the same as the inner diameter of the embedded part body;

[0016] The thin-walled aluminum tube is bonded to the first positioning step.

[0017] In one embodiment of the present invention, the inner diameter of the metal embedded part is adapted to the outer diameter of the center rod;

[0018] The outer diameter of the metal embedded part is the same as the outer diameter of the thin-walled aluminum tube.

[0019] In one embodiment of the present invention, the thickness of the thin-walled aluminum tube is 1 mm, and the length is determined according to the position and number of the metal embedded parts in the carbon fiber tube.

[0020] In one embodiment of the present invention, the center rod is a stepped rod with threaded sections at both ends and a smooth circular section in the middle (for supporting the mold body);

[0021] The length of the central rod is greater than that of the mold body, and the length of the light circle segment is less than that of the mold body.

[0022] In one embodiment of the present invention, the polished circular segment is a steel non-threaded polished rod.

[0023] In one embodiment of the present invention, the outer surface of the threaded segment is provided with an external thread.

[0024] In one embodiment of the present invention, an internal threaded hole is provided on a side of the locking rod close to the limiting plate;

[0025] The internal threaded hole cooperates with the threaded section.

[0026] In one embodiment of the present invention, the limiting plate is provided with a second positioning step and a center hole is provided at the center;

[0027] The second positioning step is arranged on the side of the limiting plate close to the thin-walled aluminum tube;

[0028] The inner diameter of the center hole of the limiting plate is larger than the outer diameter of the threaded section;

[0029] The outer diameter of the second positioning step is adapted to the inner diameter of the thin-walled aluminum tube.

[0030] In one embodiment of the present invention, the locking rod is a stepped shaft.

[0031] In one embodiment of the present invention, the outer diameter of the side of the locking rod connected to the threaded section is larger than the inner diameter of the central hole.

[0032] In one embodiment of the present invention, a plurality of pin holes are evenly distributed on the outer surface of the limiting disk along the direction of the center axis of the limiting disk;

[0033] The position of the pin hole is provided with a metal pin that matches it (to prevent the carbon fiber yarn from slipping at the end during winding).

[0034] In one embodiment of the present invention, the metal pin and the pin hole are bonded together by an adhesive.

[0035] In one embodiment of the present invention, the diameter of the metal pin is 1 mm, the length of the pin is 10 mm, and the diameter of the pin hole is 1.1 mm;

[0036] Preferably, there are 40 pin holes evenly distributed.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The forming die provided by the present invention can realize the winding forming of carbon fiber tubes with metal embedded parts, and the metal embedded parts can be accurately positioned as needed. The formed carbon fiber tube products can be machined and assembled with other parts; the overall manufacturing cost is low and the structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to the present invention;

[0040] Figure 2 A cross-sectional view of a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to the present invention;

[0041] Figure 3 This is a schematic structural diagram of a metal embedded part in a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to the present invention;

[0042] Figure 4 This is a schematic structural diagram of a center rod in a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to the present invention;

[0043] Figure 5 This is a schematic structural diagram of a limiting plate in a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to the present invention;

[0044] Figure 6 This is a schematic structural diagram of a locking rod in a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to the present invention;

[0045] Numbers in the figure: 1. Metal embedded part; 11. Embedded part body; 12. Annular groove; 13. First positioning step; 2. Thin-walled aluminum tube; 3. Center rod; 31. Smooth circular segment; 32. Threaded segment; 4. Limiting plate; 41. Center hole; 42. Second positioning step; 43. Pin hole; 5. Metal pin; 6. Locking rod; 7. Internal threaded hole. DETAILED DESCRIPTION

[0046] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] In the following embodiments, unless otherwise specified, the structures or components used are conventional structures or components in the art, as long as they can achieve the corresponding functions.

[0051] Example 1

[0052] This embodiment provides a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process, such as Figures 1 to 6 As shown, it includes a metal embedded part 1, a thin-walled aluminum tube 2, a center rod 3, a limit plate 4 and a locking rod 6; the metal embedded part 1, the thin-walled aluminum tube 2 and the limit plate 4 are hollow inside and are used to accommodate the center rod 3; a plurality of thin-walled aluminum tubes 2 are provided, and adjacent thin-walled aluminum tubes 2 are connected by the metal embedded part 1 to form a mold body (with high straightness); the center rod 3 is located in the mold body and extends out of the mold body, the limit plate 4 is provided at both ends of the mold body and is sleeved on the outside of the center rod 3, and the locking rod 6 is provided at both ends of the center rod 3, is threadedly connected to the center rod 3, and presses the limit plate 4;

[0053] Among them, annular grooves 12 are arranged at intervals on the outside of the metal embedded part 1 (when the carbon fiber tube is wound, the carbon fiber can be embedded in the annular groove 12, and after solidification, axial displacement between the metal embedded part 1 and the carbon fiber layer can be avoided).

[0054] Furthermore, the metal embedded part 1 includes an annular embedded part body 11 and first positioning steps 13 arranged at both ends of the embedded part body 11; the embedded part body 11 is connected to the thin-walled aluminum tube 2 through the first positioning steps 13; and annular grooves 12 are arranged at intervals on the outer surface of the embedded part body 11.

[0055] Furthermore, the outer diameter of the first positioning step 13 is adapted to the inner diameter of the thin-walled aluminum tube 2; the inner diameter of the first positioning step 13 is the same as the inner diameter of the embedded part body 11; the thin-walled aluminum tube 2 is bonded to the first positioning step 13; the inner diameter of the metal embedded part 1 is adapted to the outer diameter of the center rod 3; the outer diameter of the metal embedded part 1 is the same as the outer diameter of the thin-walled aluminum tube 2.

[0056] Furthermore, the thickness of the thin-walled aluminum tube 2 is 1 mm, and the length is determined according to the position and quantity of the metal embedded parts 1 in the carbon fiber tube.

[0057] Furthermore, the center rod 3 is a stepped rod with threaded sections 32 at both ends and a smooth circular section 31 in the middle (for supporting the mold body); the length of the center rod 3 is greater than the length of the mold body, and the length of the smooth circular section 31 is less than the length of the mold body.

[0058] Furthermore, the smooth circle segment 31 is a steel polished rod, and the outer surface of the threaded segment 32 is provided with an external thread, and the outer diameter of the threaded segment 32 is smaller than the outer diameter of the smooth circle segment 31 .

[0059] Furthermore, an internal threaded hole 7 is provided on a side of the locking rod 6 close to the limiting plate 4 ; the internal threaded hole 7 cooperates with the threaded section 32 .

[0060] Furthermore, the limiting plate 4 is provided with a second positioning step 42, and a center hole 41 is provided in the center; the second positioning step 42 is provided on the side of the limiting plate 4 close to the thin-walled aluminum tube 2; the inner diameter of the center hole 41 is larger than the outer diameter of the threaded section 32; the outer diameter of the second positioning step 42 is adapted to the inner diameter of the thin-walled aluminum tube 2.

[0061] Furthermore, the locking rod 6 is a stepped shaft, and the outer diameter of the side where the locking rod 6 is connected to the threaded section 32 of the center rod 3 is larger than the inner diameter of the center hole 41 of the limiting plate 4; a tail fixed center hole is provided on the side of the locking rod 6 away from the limiting plate 4;

[0062] Furthermore, along the direction of the central axis of the limit plate 4, the outer surface of the limit plate 4 is evenly distributed with a plurality of pin holes 43; the positions of the pin holes 43 are provided with metal pins 5 that match them (to prevent the yarn from slipping at the end during winding).

[0063] Furthermore, the metal pin 5 is bonded to the pin hole 43 by adhesive, the diameter of the metal pin 5 is 1 mm, the length of the pin is 10 mm, and the diameter of the pin hole 43 is 1.1 mm; preferably, 40 pin holes 43 are evenly distributed.

[0064] Example 2

[0065] This embodiment provides a method for using a forming mold (Example 1) for preparing a carbon fiber tube with metal embedded parts based on a winding process, as follows:

[0066] During use, after the forming mold is assembled, it is placed on the machine bed of the winding machine, and a three-tooth clamp is used to clamp one locking rod 6, and then the surrounding top is used to support the other locking rod 6 (the surrounding top is embedded in the tail center hole of the locking rod); then the winding machine is started, and the winding machine works, and the carbon fiber yarn is wound onto the surface of the mold body. After the winding is completed, after curing and forming, a carbon fiber tube with metal embedded parts is obtained.

[0067] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the explanations of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process, characterized in that: It comprises a metal embedded part (1), a thin-walled aluminum tube (2), a center rod (3), a limit plate (4) and a locking rod (6); The metal embedded part (1), the thin-walled aluminum tube (2) and the limiting plate (4) are hollow inside and are used to accommodate the center rod (3); A plurality of thin-walled aluminum tubes (2) are provided, and adjacent thin-walled aluminum tubes (2) are connected by metal embedded parts (1) to form a mold body; the center rod (3) is located in the mold body and extends out of the mold body; the limit plate (4) is provided at two ends of the mold body and sleeved on the outside of the center rod (3); the locking rod (6) is provided at two ends of the center rod (3), is threadedly connected to the center rod (3), and presses the limit plate (4); Wherein, annular grooves (12) are arranged at intervals on the outer side of the metal embedded part (1).

2. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 1, characterized in that: The metal embedded part (1) comprises a ring-shaped embedded part body (11) and first positioning steps (13) arranged at two ends of the embedded part body (11); The embedded part body (11) is connected to the thin-walled aluminum tube (2) via a first positioning step (13); Annular grooves (12) are arranged at intervals on the outer surface of the embedded component body (11).

3. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 2, characterized in that: The outer diameter of the first positioning step (13) is adapted to the inner diameter of the thin-walled aluminum tube (2); The inner diameter of the first positioning step (13) is the same as the inner diameter of the embedded part body (11); The thin-walled aluminum tube (2) is bonded to the first positioning step (13).

4. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 2, characterized in that: The inner diameter of the metal embedded part (1) is adapted to the outer diameter of the center rod (3); The outer diameter of the metal embedded part (1) is the same as the outer diameter of the thin-walled aluminum tube (2).

5. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 1, characterized in that: The central rod (3) is a stepped rod with threaded sections (32) at both ends and a smooth circular section (31) in the middle; The length of the central rod (3) is greater than the length of the mold body, and the length of the light circle segment (31) is less than the length of the mold body.

6. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 5, characterized in that: The outer surface of the threaded section (32) is provided with external threads.

7. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 6, characterized in that: An internal threaded hole (7) is provided on one side of the locking rod (6) close to the limiting plate (4); The internal threaded hole (7) cooperates with the threaded section (32).

8. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 7, characterized in that: The limiting plate (4) is provided with a second positioning step (42) and a center hole (41) is provided at the center; The second positioning step (42) is arranged on a side of the limiting plate (4) close to the thin-walled aluminum tube (2); The inner diameter of the central hole (41) is larger than the outer diameter of the threaded section (32); The outer diameter of the second positioning step (42) is adapted to the inner diameter of the thin-walled aluminum tube (2).

9. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 8, characterized in that: The outer diameter of the side of the locking rod (6) connected to the threaded section (32) is larger than the inner diameter of the central hole (41).

10. The forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process according to claim 8, characterized in that: Along the direction of the center axis of the limiting plate (4), the outer surface of the limiting plate (4) is evenly provided with a plurality of pin holes (43); The position of the pin hole (43) is provided with a metal pin (5) adapted thereto.

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