Nut positioning device for carbon fiber composite product

Abstract

The utility model provides a nut positioning device for a carbon fiber composite product, and belongs to the technical field of embedded nuts. The nut positioning device of the carbon fiber composite product comprises an embedded nut and further comprises a mold plate, a carbon fiber cloth layer and a locking screw, the embedded nut is arranged in the carbon fiber cloth layer in a sleeved mode, the carbon fiber cloth layer comprises upper-layer carbon fiber cloth and lower-layer carbon fiber cloth, and the lower-layer carbon fiber cloth is arranged on the surface of the embedded nut in a sleeved mode. According to the utility model, the carbon fiber cloth layer and the mold plate are arranged, the limiting cavity at the bottom of the pre-embedded nut is aligned with a processed product for sleeving, the lower carbon fiber cloth is sleeved on the surface of the pre-embedded nut, the upper carbon fiber cloth is laid on the top of the pre-embedded nut, and the locking screw is in threaded connection with the pre-embedded nut; the pre-embedded nut and the carbon fiber cloth layer are integrally formed by adopting various modes such as wet forming, autoclave forming and compression molding, so that the preparation method does not need secondary processing.

Description

Technical Field

[0001] The utility model relates to the technical field of embedded nuts, in particular to a nut positioning device for a carbon fiber composite material product. Background Art

[0002] The existing technology for achieving the location of the component installation surface on the inner surface of the carbon fiber composite product is mainly to bond the parts with threaded holes to the inner surface by structural adhesive after the carbon fiber composite product is formed, and to punch holes in the carbon fiber composite product after it is formed and fix it with fasteners.

[0003] The disadvantage of bonding parts with threaded holes to the inner surface with structural adhesive after the carbon fiber composite product is formed is that the bonding after the carbon fiber composite product is formed requires secondary processing, which is not suitable for mass production, has low production efficiency, and increases production costs. By bonding parts with threaded holes to the inner surface of the carbon fiber composite product, the installation dimensional accuracy of the parts cannot be guaranteed and the flatness of the bonding surface is difficult to constrain. The bonding force and load-bearing capacity of the bonding process are poor, and the appearance uniformity of the product is poor. The disadvantage of punching holes and fixing them with fasteners after the carbon fiber composite product is formed is that the product parts need to be fixed with fasteners after the carbon fiber composite product is formed. The fasteners are exposed on the surface of the carbon fiber composite product, which affects the appearance of the product and is not conducive to placement and assembly. For products with special requirements such as sealing, this method has great limitations. Summary of the invention

[0004] In order to make up for the above deficiencies, the utility model provides a nut positioning device for a carbon fiber composite material product, which overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a nut positioning device for a carbon fiber composite material product, comprising a pre-embedded nut, a mold plate, a carbon fiber cloth layer and a locking screw. The pre-embedded nut is sleeved inside the carbon fiber cloth layer.

[0007] In a preferred solution, the carbon fiber cloth layer includes an upper carbon fiber cloth layer and a lower carbon fiber cloth layer, the lower carbon fiber cloth layer is sleeved on the surface of the embedded nut, and the upper carbon fiber cloth layer is arranged on the top of the embedded nut.

[0008] In a preferred solution, openings are provided on both the left and right sides of the embedded nut, knurling is provided on the surface of the embedded nut, and a limiting cavity is provided on the bottom of the embedded nut.

[0009] In a preferred solution, the mold plate is arranged on the top of the upper carbon fiber cloth, a positioning hole is opened between the mold plate and the upper carbon fiber cloth, and the positioning hole is communicated with the inner cavity of the embedded nut.

[0010] In a preferred solution, the locking screw is sleeved inside the positioning hole, and the locking screw and the embedded nut are threadedly connected.

[0011] In a preferred solution, the interior of the positioning hole is filled with a filler, the height of the filler is flush with the upper layer of carbon fiber cloth, and the height of the lower layer of carbon fiber cloth is flush with the embedded nut.

[0012] The utility model provides a nut positioning device for a carbon fiber composite material product, and its beneficial effects include:

[0013] 1. By setting a carbon fiber cloth layer and a mold plate, the limiting cavity at the bottom of the embedded nut is aligned with the processed product, the lower carbon fiber cloth is sleeved on the surface of the embedded nut, the upper carbon fiber cloth is laid on the top of the embedded nut, the locking screw is threadedly connected with the embedded nut, and the embedded nut and the carbon fiber cloth layer are integrally formed by wet molding, autoclave molding, compression molding and other methods, so that the preparation method does not require secondary processing.

[0014] 2. By setting the filler, when the one-piece molding is completed, rotate the locking screw in the opposite direction to disengage the locking screw from the inside of the positioning block, remove the mold plate, and pour the filler into the inside of the positioning hole. The type of filler can be epoxy resin filler, polyimide filler, polyamide filler, polyurethane filler and other fillers, and the height of the filler is flush with the upper carbon fiber cloth, so that the one-piece molded product has no gaps, improving the aesthetics and use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure provided by the implementation mode of the utility model;

[0017] Figure 2 A schematic diagram of the threaded connection between a locking screw and an embedded nut is provided for an embodiment of the utility model;

[0018] Figure 3A schematic diagram of an embodiment of the utility model after the product is integrally formed is provided;

[0019] Figure 4 A schematic diagram of a first embodiment is provided for the implementation of the utility model;

[0020] Figure 5 A second embodiment schematic diagram is provided for the implementation of the utility model.

[0021] In the figure: 1. embedded nut; 2. mold plate; 3. carbon fiber cloth layer; 301. upper carbon fiber cloth; 302. lower carbon fiber cloth; 4. locking screw; 5. limiting cavity; 6. positioning hole; 7. filler. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1-5 The utility model provides a technical solution: a nut positioning device 1 and a box body for a carbon fiber composite material product, comprising an embedded nut 1, a mold plate 2, a carbon fiber cloth layer 3 and a locking screw 4, the embedded nut 1 is sleeved inside the carbon fiber cloth layer 3, the top of the box body is provided with a cavity, the embedded nut 1 is sleeved inside the cavity, the carbon fiber cloth layer 3 comprises an upper carbon fiber cloth 301 and a lower carbon fiber cloth 302, the lower carbon fiber cloth 302 is sleeved on the surface of the embedded nut 1, the upper carbon fiber cloth 301 is arranged on the top of the embedded nut 1, the left and right sides of the embedded nut 1 are provided with openings, the surface of the embedded nut 1 is provided with knurling, and the bottom of the embedded nut 1 is provided with a limiting cavity 5, by arranging the carbon fiber cloth layer 3 and the mold plate 2, in the production process of the carbon fiber composite material product, the limiting cavity 5 at the bottom of the embedded nut 1 is aligned with the processed product and sleeved, and the limiting cavity 5 can be set to a variety of shapes such as a square to prevent the embedded nut 1 from rotating.

[0024] First embodiment:

[0025] as follows Figure 4 As shown, the lower carbon fiber cloth 302 is sleeved on the surface of the embedded nut 1; the lower carbon fiber cloth 302 can be sleeved on the surface of the embedded nut 1 in a spiral shape, and the free end of the lower carbon fiber cloth 302 is in contact with the inner wall of the cavity.

[0026] Second embodiment:

[0027] as follows Figure 5 As shown, the lower carbon fiber cloth 302 can also be set as multiple layers on the embedded nut 1, and the shape is set to be circular, and the intersections of the lower carbon fiber cloth 302 of adjacent layers are staggered, and the lower carbon fiber cloth 302 at this time will have two free ends. When installing, the two free ends can be adapted to contact;

[0028] In order to make the top of the lower carbon fiber cloth 302 flush with the top of the embedded nut 1, the surface of the embedded nut 1 is provided with knurling and openings to improve the bonding force with the lower carbon fiber cloth 302 and further prevent the embedded nut 1 from rotating. Then, multiple layers of upper carbon fiber cloth 301 are laid on the top of the embedded nut 1. After completion, the locking screw 4 is passed through the positioning hole 6, and the locking screw 4 is rotated to be threadedly connected with the embedded nut 1. After that, the embedded nut 1 and the carbon fiber cloth layer 3 can be integrally formed by various methods such as wet molding, autoclave molding, and compression molding, so that the parts installed on the nut are accurately positioned. The preparation method does not require secondary processing, enhances the structural strength between the embedded nut 1 and the carbon fiber composite material product, and has great practical value.

[0029] Reference Figure 1-5 The mold plate 2 is arranged on the top of the upper carbon fiber cloth 301, and a positioning hole 6 is opened between the mold plate 2 and the upper carbon fiber cloth 301. The positioning hole 6 is connected to the inner cavity of the embedded nut 1, and the locking screw 4 is sleeved inside the positioning hole 6. The locking screw 4 and the embedded nut 1 are threadedly connected. The interior of the positioning hole 6 is filled with a filler 7, and the height of the filler 7 is flush with the upper carbon fiber cloth 301, and the height of the lower carbon fiber cloth 302 is flush with the embedded nut 1. By setting the filler 7, when the one-piece molding is completed, the locking screw 4 is rotated in the opposite direction to disengage the locking screw 4 from the inside of the positioning block, and the mold plate 2 is removed. The filler 7 is poured into the interior of the positioning hole 6. The type of the filler 7 can be a variety of fillers 7 such as epoxy resin fillers, polyimide fillers, polyamide fillers and polyurethane fillers, and the height of the filler 7 is flush with the upper carbon fiber cloth 301, so that the one-piece molded product has no gaps, thereby improving the aesthetics and use effect.

[0030] Specifically, the working process or working principle of the nut positioning device 1 for a carbon fiber composite material product is as follows: when in use, during the production process of the carbon fiber composite material product, the limiting cavity 5 at the bottom of the embedded nut 1 is aligned with the processed product and sleeved, and the limiting cavity 5 can be set to a variety of shapes such as a square to prevent the embedded nut 1 from rotating, and the lower carbon fiber cloth 302 is sleeved on the surface of the embedded nut 1, and the lower carbon fiber cloth 302 can be sleeved on the surface of the embedded nut 1 in a spiral shape, or the lower carbon fiber cloth 302 can be set to be sleeved on the embedded nut 1 in multiple layers, and the shape is set to be circular, leaving no gaps between each layer, and the height of the top of the lower carbon fiber cloth 302 is flush with the top of the embedded nut 1, and the surface of the embedded nut 1 is provided with knurling and openings to improve the alignment with the lower carbon fiber cloth 302 The embedded nut 1 is bonded with a force to further prevent the embedded nut 1 from rotating, and then multiple layers of upper carbon fiber cloth 301 are laid on the top of the embedded nut 1. After completion, the locking screw 4 is passed through the positioning hole 6, and the locking screw 4 is rotated to be threadedly connected with the embedded nut 1. After that, various methods such as wet molding, autoclave molding, and compression molding can be used to integrally form the embedded nut 1 and the carbon fiber cloth layer 3. The locking screw 4 is rotated in the opposite direction to disengage the locking screw 4 from the inside of the positioning block, and the mold plate 2 is removed. Filler 7 is poured into the inside of the positioning hole 6. The type of filler 7 can be epoxy resin filler, polyimide filler, polyamide filler, polyurethane filler and other fillers, and the height of the filler 7 is flush with the upper carbon fiber cloth 301, so that the one-piece molded product has no gaps.

Claims

1. A nut positioning device for a carbon fiber composite material product, comprising an embedded nut (1), characterized in that: It also comprises a mould plate (2), a carbon fibre cloth layer (3) and a locking screw (4), wherein the embedded nut (1) is sleeved inside the carbon fibre cloth layer (3).

2. The nut positioning device for a carbon fiber composite material product according to claim 1, characterized in that: The carbon fiber cloth layer (3) comprises an upper carbon fiber cloth (301) and a lower carbon fiber cloth (302), wherein the lower carbon fiber cloth (302) is sleeved on the surface of the embedded nut (1), and the upper carbon fiber cloth (301) is arranged on the top of the embedded nut (1).

3. The nut positioning device for a carbon fiber composite material product according to claim 2, characterized in that: Openings are provided on both left and right sides of the embedded nut (1); a knurling is provided on the surface of the embedded nut (1); and a limiting cavity (5) is provided on the bottom of the embedded nut (1).

4. The nut positioning device for a carbon fiber composite material product according to claim 3, characterized in that: The mold plate (2) is arranged on top of the upper carbon fiber cloth (301), a positioning hole (6) is provided between the mold plate (2) and the upper carbon fiber cloth (301), and the positioning hole (6) is communicated with the inner cavity of the embedded nut (1).

5. The nut positioning device for a carbon fiber composite material product according to claim 4, characterized in that: The locking screw (4) is sleeved inside the positioning hole (6), and the locking screw (4) and the embedded nut (1) are threadedly connected.

6. The nut positioning device for a carbon fiber composite material product according to claim 5, characterized in that: The interior of the positioning hole (6) is filled with a filler (7), the height of the filler (7) is flush with the upper layer of carbon fiber cloth (301), and the height of the lower layer of carbon fiber cloth (302) is flush with the embedded nut (1).

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