Forming die for preparing carbon fiber tube with metal embedded part based on winding process

Abstract

The 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, which comprises the metal embedded part, a thin-wall aluminum tube, a center rod, a limiting disc and a locking rod, the metal embedded part, the thin-wall aluminum pipe and the limiting disc are hollow and used for containing the center rod. The multiple thin-wall aluminum pipes are arranged, and the adjacent thin-wall aluminum pipes are connected through the metal embedded parts to form a mold body. The center rod extends out of the die body, the limiting discs are arranged at the two ends of the die body and arranged on the outer side of the center rod in a sleeving mode, and the locking rods are arranged at the two ends of the center rod, connected with the center rod in a threaded mode and tightly press the limiting discs. Annular grooves are formed in the outer side of the metal embedded part at intervals. According to the forming die, the metal part is pre-buried in the local position when the carbon fiber pipe is formed, and the prepared carbon fiber pipe is light in weight and simple in structure.

Description

Technical Field

[0001] The 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 a metal embedded part based on a winding process. Background Art

[0002] In recent years, with the continuous expansion of the application field of carbon fiber materials, the use conditions and requirements are becoming higher and higher, and the demand for carbon fiber composite products containing metal embedded parts is increasing. Due to the anisotropy of carbon fiber composite materials and the special manufacturing process, the matrix after molding is not suitable for mechanical processing, otherwise it will destroy the continuity of the matrix fiber and affect the mechanical properties. In order to ensure the installation accuracy and performance requirements of carbon fiber composite components, metal embedded parts are usually placed in advance on the carbon fiber composite matrix, and the component accuracy and performance requirements are ensured by processing the embedded parts.

[0003] At present, most carbon fiber products with metal embedded parts are non-rotational. The molding method uses prepreg layering to place metal parts on the reserved position of the prepreg, and then put them into a composite mold for heating and pressurizing to cure. This method has low production efficiency and high cost, and is not suitable 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] In order to solve the above problems, the purpose of the present invention is to provide a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process. The present invention realizes the embedding of metal parts at local positions when the carbon fiber tube is formed. The carbon fiber tube prepared by the forming die provided by the present invention is light in weight, simple in structure, and the embedded metal parts are accurately positioned. At the same time, 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] The thin-walled aluminum tubes are provided in a plurality, 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 plate is provided at two ends of the mold body and sleeved on the outside of the center rod, and the locking rod is provided at two ends of the center rod, is threadedly connected with the center rod, and presses the limit plate;

[0010] Among them, annular grooves are arranged at intervals on the outer side of the metal embedded part (when the carbon fiber is wound, 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 arranged 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] The outer surface of the embedded component body is provided with annular grooves at intervals.

[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 quantity 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 the length of the mold body, and the length of the light circle segment is less than the length of the mold body.

[0022] In one embodiment of the present invention, the smooth circular segment is a steel non-threaded smooth 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 one 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 a 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 matched with 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 greater than the inner diameter of the center 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 matched therewith (to prevent the carbon fiber yarn from slipping at the end when winding).

[0034] In one embodiment of the present invention, the metal pin is bonded to the pin hole 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, 40 pin holes are evenly distributed.

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

[0038] The molding die provided by the present invention can realize the winding molding of the carbon fiber tube with the metal embedded parts, and the metal embedded parts can be accurately positioned as required, and the molded carbon fiber tube product 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 It is a structural schematic diagram of a forming mold for preparing a carbon fiber tube with metal embedded parts based on a winding process of 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 of the present invention;

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

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

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

[0044] Figure 6 It is a structural schematic diagram of a locking rod in a forming mold for preparing a carbon fiber tube with a metal embedded part based on a winding process of 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 section; 32. Threaded section; 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 is described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0049] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description 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; the thin-walled aluminum tubes 2 are provided with a plurality of them, and the 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 arranged at the two ends of the mold body, and is sleeved on the outside of the center rod 3, and the locking rod 6 is arranged at the two 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 grooves 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 two 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 step 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 circle section 31 (for supporting the mold body) in the middle; the length of the center rod 3 is greater than the length of the mold body, and the length of the smooth circle section 31 is less than the length of the mold body.

[0058] Furthermore, the smooth circle segment 31 is a steel polished rod, 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 limiting disk 4, the outer surface of the limiting disk 4 is evenly provided with a plurality of pin holes 43; the positions of the pin holes 43 are provided with metal pins 5 adapted thereto (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 a metal embedded part based on a winding process, which is specifically as follows:

[0066] When in use, after the forming mold is assembled, it is placed on the machine bed of the winding machine, and a locking rod 6 is clamped by a three-tooth clamp, and then the other locking rod 6 is supported by the surrounding top (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 to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the explanation 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. According to claim 1, a forming die for preparing a carbon fiber tube with metal embedded parts based on a winding process is characterized in that: The metal embedded part (1) comprises an annular embedded part body (11) and first positioning steps (13) arranged at two ends of the embedded part body (11); The embedded component 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 component body (11); The thin-walled aluminum tube (2) is bonded and connected 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) matches 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 greater than the inner diameter of the center 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 central axis of the limiting plate (4), a plurality of pin holes (43) are evenly distributed on the outer surface of the limiting plate (4); The position of the pin hole (43) is provided with a metal pin (5) matched therewith.

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