Composite ear piece and method for manufacturing the same

Abstract

The present invention discloses a composite material ear piece and a manufacturing method thereof, wherein the composite material ear piece comprises: a composite material sleeve, which is annular and has a through hole; a composite material body, which is formed by paving outside the sleeve; and a composite material outer shell, which is provided with a receiving cavity for placing the composite material sleeve and the composite material body, wherein the composite material ear piece is integrally formed. The composite material ear piece of the present invention replaces the metal joint in the original ear piece with a composite material sleeve, and continues to use the composite material body and the composite material outer shell in the composite material sleeve, thereby increasing the overall strength of the ear piece. The composite material ear piece of the present invention is integrally formed, thereby avoiding the introduction of new defects to the ear piece by secondary bonding.

Description

Technical Field

[0001] The invention relates to the field of composite materials, in particular to a composite material ear piece and a manufacturing method thereof. Background Art

[0002] At present, large and complex composite assemblies are widely designed and used with hinged connections with ears as a connection joint with a certain degree of freedom. Metal joints are more stable than composite joints, but their weight is significantly increased. If the parts connected to the joints are composite materials, the connection between the metal joints and the composite materials needs to be considered, which increases the complexity of the design and the risk of failure. The connection strength of the connection surface between the metal joint and the composite material is lower than the strength of the metal joint or the composite material itself, so the ears are prone to cracking and failure.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a composite material ear piece and a manufacturing method thereof, which can improve the self strength of the ear piece and reduce the weight of the ear piece.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a composite ear piece, comprising: a composite sleeve, which is annular and has a through hole; a composite body, which is paved and formed outside the sleeve; and a composite outer sleeve, which is provided with a accommodating cavity for placing the composite sleeve and the composite body, wherein the composite ear piece is formed in one piece.

[0006] In one or more embodiments of the present invention, the composite ear piece further includes a filler for filling defects of the composite ear piece that occur during the integral molding process.

[0007] In one or more embodiments of the present invention, the filler is located in a gap formed by the composite material sleeve, the composite material body, and the composite material outer sleeve.

[0008] In one or more embodiments of the present invention, the composite material body is formed by paving and stacking a plurality of paving layers, and the filler is located between two adjacent paving layers.

[0009] In one or more embodiments of the present invention, the filler is a unidirectional composite material or a fabric composite material.

[0010] In one or more embodiments of the present invention, the composite material jacket is made of a woven glass fiber reinforced resin-based composite material or a woven carbon fiber reinforced resin-based composite material.

[0011] In one or more embodiments of the present invention, the composite material body is laid and formed on the radially outer side of the sleeve.

[0012] In one or more embodiments of the present invention, the composite material body is made of a unidirectional carbon fiber reinforced resin-based composite material.

[0013] An embodiment of the present invention also provides a method for manufacturing a composite ear piece, comprising the following steps: preparing a composite sleeve; forming a composite body outside the composite sleeve to obtain a semi-finished product; forming a composite outer sleeve outside the composite sleeve and the composite body to obtain a preformed product; and integrally curing the preform to obtain the composite ear piece.

[0014] In one or more embodiments of the present invention, the manufacturing method further comprises: laying a filler in the composite material body; or laying a filler in the preform.

[0015] Compared with the prior art, the composite ear piece and the manufacturing method thereof according to the embodiment of the present invention use a composite sleeve to replace the metal joint in the original ear piece, and continue to use a composite body and a composite jacket in the composite sleeve, thereby increasing the overall strength of the ear piece. The composite ear piece of the present invention is integrally formed, avoiding the introduction of new defects to the ear piece by secondary bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a composite bushing according to an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of a composite material body according to one embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of a composite jacket according to one embodiment of the present invention;

[0019] Figure 4 is an overall schematic diagram of a composite ear piece according to one embodiment of the present invention;

[0020] Figure 5 is a cross-sectional view of a composite ear piece according to one embodiment of the present invention;

[0021] Figure 6 yes Figure 5 The enlarged view of point A in the middle;

[0022] Figure 7 is a partial cross-sectional view of a composite ear piece according to another embodiment of the present invention.

[0023] Description of main reference numerals:

[0024] 1. Composite material sleeve; 11. Through hole; 2. Composite material body; 21. Round hole; 22. Paving layer; 3. Composite material jacket; 31. Accommodating cavity; 32. External hole; 4. Filler. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0026] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0027] like Figures 1 to 4 As shown, the composite ear piece according to the preferred embodiment of the present invention comprises a composite sleeve 1, a composite body 2 formed outside the composite sleeve 1, and a composite jacket 3 wrapping the composite sleeve 1 and the composite body 2. The composite ear piece is made by integrally molding the composite sleeve 1, the composite body 2, and the composite jacket 3.

[0028] like Figure 1 As shown, the composite sleeve 1 may be annular and have a through hole 11. The composite sleeve 1 may reduce the stress concentration of the surrounding material when the ear hole of the ear piece is stressed, enhance the extrusion strength of the structure around the ear hole, and prevent the ear hole from failing. The composite sleeve 1 may be made of a unidirectional carbon fiber reinforced resin-based composite material.

[0029] The composite bushing 1 can also be considered as a cylinder with a through hole 11, and the through hole 11 passes through the upper and lower surfaces of the cylinder.

[0030] like Figure 2 As shown, a circular hole 21 may be provided on the composite body 2, and the composite sleeve 1 is located in the circular hole 21. That is, the inner diameter of the circular hole 21 may be the same as the outer diameter of the composite sleeve 1.

[0031] The composite body 2 can be made of a unidirectional carbon fiber reinforced resin-based composite material. That is, the composite body 2 can be formed by paving the unidirectional carbon fiber reinforced resin-based composite material on the radial outer side of the composite sleeve 1 to resist the deformation of the ear piece and transfer the load to the connected structure. The composite body 2 can be a multi-layer structure.

[0032] like Figure 3 As shown, a receiving cavity 31 for placing the composite sleeve 1 and the composite body 2 may be provided in the composite jacket 3. It can be understood that the composite jacket 3 can be wrapped around the outer surface of the composite body 2 and the end face of the composite sleeve 1. The composite jacket 3 can prevent the composite body 2 and the composite sleeve 1 from being damaged by external non-structural loads, and play a role in enhancing the connection performance of each part and preventing the end from delamination and cracking.

[0033] The composite jacket 3 may also be provided with an outer hole 32 in the same direction as the through hole 11. The outer hole 32 is connected to the accommodating cavity 31, and when the composite sleeve 1, the composite body 2 and the composite jacket 3 are installed, the outer hole 32 may partially overlap with the through hole 11.

[0034] The ear hole of the composite material ear piece of the present invention may include the outer hole 32 ; or the ear hole of the composite material ear piece may be understood to be formed by the outer hole 32 and the through hole 11 .

[0035] The composite material jacket 3 is made of a woven glass fiber reinforced resin-based composite material or a woven carbon fiber reinforced resin-based composite material.

[0036] The composite ear piece also includes a filler 4. It is used to fill the lack of material or glue in the structure due to differences in composite material design and process control. In order to ensure the compactness of the composite ear piece structure and reduce manufacturing defects, the filler 4 can fill the defects of the composite ear piece during the one-piece molding process.

[0037] like Figure 5 and Figure 6 As shown, in a specific implementation, the filler 4 can be located in the gap formed by the composite material sleeve 1, the composite material body 2, and the composite material outer sleeve 3.

[0038] like Figure 7 As shown, in another specific embodiment, the composite material body 2 can be formed by paving and stacking a plurality of paving layers 22 , and the filler 4 can be located between two adjacent paving layers 22 .

[0039] The filler 4 may be made of a unidirectional composite material or a fabric composite material.

[0040] The present invention also provides a method for manufacturing a composite material ear piece, comprising the following steps:

[0041] A composite material bushing 1 is prepared.

[0042] The above steps may specifically be as follows: a round tube mold with a diameter equal to that of the through hole 11 is selected to perform circumferential winding of the prepreg, and the composite material sleeve 1 is obtained after being heated and cured to a fixed length.

[0043] A composite material body 2 is formed outside the composite material sleeve 1 to obtain a semi-finished product.

[0044] The above steps may be specifically as follows: the cut paving layer 22 is stacked with its circular hole 21 aligned with the composite sleeve 1, the ply stacking direction is the thickness direction of the ear piece (i.e. the extension direction of the through hole 11), the circular hole 21 of the paving layer 22 completely covers the radial outer side of the composite sleeve 1, and the two form a semi-finished product. The theoretical thickness of the composite body 2 after molding is slightly smaller than the length of the composite sleeve 1 (i.e. the length along the extension direction of the through hole 11).

[0045] A composite outer shell 3 is formed outside the composite shaft sleeve 1 and the composite body 2 to obtain a preform.

[0046] The above steps may be specifically as follows: the composite jacket 3 is laid in the mold cavities of the upper mold and the lower mold, and then the semi-finished product is placed in the mold cavities of the upper mold and the lower mold, and the semi-finished product is positioned by the mutual position of the through hole 11 and the outer hole 32. After the upper mold and the lower mold are closed, the composite jacket 3 covers the surface of the composite shaft sleeve 1 and the composite body 2 (i.e., the semi-finished product).

[0047] And after the preform is integrally solidified, a composite ear piece is obtained.

[0048] like Figure 5 and Figure 6 As shown, in a specific embodiment, the manufacturing method further includes: paving a filler 4 in the composite material body 2. That is, the filler 4 is paved at the outer hole 32 of the composite material body 2.

[0049] like Figure 7 As shown, in another specific embodiment, the manufacturing method further comprises: paving a filler 4 in the preform, that is, paving the filler 4 between a plurality of paving layers 22 .

[0050] The position of the filler 4 can be determined according to the position of the defect generated during the design.

[0051] The integral molding step in the method for manufacturing the composite ear piece may adopt a prepreg compression molding process or an RTM molding process or a derivative process thereof.

[0052] In summary, the composite ear piece and the manufacturing method thereof according to the embodiment of the present invention have the following beneficial effects: the overall strength of the ear piece is increased by replacing the metal joint in the original ear piece with the composite sleeve 1, and continuing to use the composite body 2 and the composite jacket 3 in the composite sleeve 1. The composite ear piece of the present invention is integrally formed, avoiding the introduction of new defects to the ear piece by secondary bonding.

[0053] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A composite material ear piece, characterized in that: include: A composite material sleeve is annular and has a through hole; A composite material body is formed by paving outside the shaft sleeve, and the composite material body is formed by paving and stacking a plurality of paving layers; and A composite material outer shell, in which a receiving cavity for accommodating the composite material shaft sleeve and the composite material body is provided; A filler, used to fill defects of the composite ear piece during the one-piece molding process, the filler is located in a gap formed by the composite shaft sleeve, the composite body, and the composite jacket, and the filler is also located between two adjacent paving layers; The composite ear piece is integrally formed, and the composite material is mainly a unidirectional carbon fiber reinforced resin-based composite material.

2. The composite ear piece according to claim 1, characterized in that: The filler is a unidirectional composite material or a fabric composite material.

3. The composite ear piece according to claim 1, characterized in that: The composite material jacket is made of a woven glass fiber reinforced resin-based composite material or a woven carbon fiber reinforced resin-based composite material.

4. The composite ear piece according to claim 1, characterized in that: The composite material body is formed by paving on the radial outer side of the sleeve.

5. The composite ear piece according to claim 1, characterized in that: The composite material body is made of unidirectional carbon fiber reinforced resin-based composite material.

6. A method for manufacturing a composite material ear piece, characterized in that: The following steps are involved: preparing composite bushings; Forming a composite material body outside the composite material sleeve to obtain a semi-finished product; Forming a composite material outer shell outside the composite material shaft sleeve and the composite material body to obtain a preform; as well as After the preform is integrally solidified, the composite ear piece is obtained.

7. The method for manufacturing a composite material ear piece according to claim 6, characterized in that: The manufacturing method further comprises: laying a filler in the composite material body; or laying a filler in the preformed product.

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