CN116021796A - H-beam structure composite material supporting plate and forming method and forming device thereof - Google Patents

Abstract

The present invention relates to the technical field of composite material forming methods, and in particular to an H-beam structure composite material support plate and its forming method and forming device. The forming device of the H-beam structure composite material support plate includes a base plate, a split valve, a positioning device and an equalizing plate The molding method of the H-beam structure composite support plate includes: making a support plate forming device, preparing a prepreg, assembling the forming device and laying the prepreg, curing the prepreg in an autoclave, removing the forming device to obtain the H Composite support plates for beam structures. The invention can improve the internal quality of the product and the size requirements of the outer surface of the product, avoid quality defects in the web position from affecting the strength requirements of the product, and ensure the accuracy of the outer surface of the product to avoid misalignment and product scrapping.

Description

H-beam structure composite support plate and its forming method and forming device

technical field

The invention relates to the technical field of composite material forming methods, in particular to an H-beam structure composite material support plate, a forming method and a forming device thereof.

Background technique

In recent years, due to the rapid development of composite materials due to their excellent properties, the aerospace industry, high-speed rail industry and other industrial fields have launched in-depth research on composite materials. Among them, H-beam structural composite parts are mostly used in support structures of launch vehicles, missiles, etc., and their main characteristics are high strength, high specific modulus, low cost, light weight, short production cycle, high stability, and high structural efficiency. . With the continuous development of the field of composite materials and the continuous improvement of requirements, such support structure materials are constantly updated, and the structure is continuously optimized to become more and more complex, and the requirements for the forming and manufacturing process of composite structural parts are also constantly increasing.

At present, there are two commonly used molding methods for composite H-beam structures: one is the metal-to-mold molding process. Due to the structural form of the product, the web of the H-beam structure is prone to flaw detection defects, and the internal quality is affected. And there are steps on the outer surface of the product when the metal outer mold is closed, which has a great impact on the mechanical properties and appearance quality of the product; the other is the autoclave molding process, and the mold structure and process implementation of the modified molding process are relatively Simple, but the outer surface of the product obtained by this molding process will have large steps, poor dimensional accuracy, unable to meet the use requirements, and easily lead to scrap.

Contents of the invention

The purpose of the present invention is to overcome the defect of prior art, propose a kind of H-beam structure composite material support plate and its forming method and forming device, H-beam structure composite material support plate forming device improves the upper and lower sides of H-beam structure through positioning device Parts are prone to misalignment; the forming method of the H-beam structure composite material support plate can solve the problems of complex forming process and easy internal quality defects of the H-shaped structural web.

To achieve the above object, the present invention adopts the following specific technical solutions:

An H-beam structure composite support plate molding device provided by the present invention includes a base plate, a split plate and an equalizing plate, the split plate and the base plate are combined and installed, and the equalizing plate is placed on the periphery of the assembled base plate and the split plate to ensure the safety of the product Dimensions.

Furthermore, the split valve is composed of a plurality of parts spliced together, and each part can be disassembled and installed independently, which is convenient for product demoulding.

Furthermore, the molding device also includes a positioning device, which is used to fix the positions of the base plate and the split flaps, and prevent misalignment during assembly.

The forming method of a kind of H-beam structure composite support plate provided by the invention comprises the following steps:

S1, making H-beam structure composite support plate forming device;

S2, preparing a prepreg comprising a matrix material and a reinforcing material;

S3. Assemble the split of the molding device, use prepreg to lay webs on the split, and vacuumize and pre-press after laying 8-12 layers every time, and discharge air bubbles to make the layers of prepreg more compact;

S4. Use the positioning device in the molding device to fix the positions of the substrate and the splits, assemble the substrate and the splits, and use prepreg to wrap the joint between the substrate and the splits;

S5. Remove the positioning device, and use prepreg to lay the wing plate;

S6. After the wing plate is laid, the equalizing plates in the forming device are placed on the outside of the wing plate in turn to closely adhere to the prepreg to ensure the outer shape of the product wing plate;

S7, performing autoclave curing molding on the prepreg;

S8, removing the base plate, the split flap and the equalizing plate to obtain the H-beam structure composite support plate.

Further, cyanate resin is selected as the matrix material, T700 grade carbon fiber is selected as the reinforcing material, and the prepreg is prepared by a hot-melt preparation process.

Further, using the prepreg to lay the web on the split includes the following steps:

The entire support plate is divided into two symmetrical parts with the mid-plane of the web as the symmetrical plane, and the prepregs are placed separately with each side of the web as the 0° direction, and the corner position of the support plate ± 45° lap laying to ensure the continuity of the fiber layup and the overall structural strength.

Further, the base plate and the split flaps are assembled using positioning pins and bolts.

Furthermore, the process conditions for curing and molding in an autoclave are: the degree of vacuum is not greater than -0.095MPa, the curing temperature is 130°C-180°C, and the pressure is 0.2MPa-0.3MPa.

The invention provides an H-beam structure composite material support plate, which is manufactured by the forming method of the H-beam structure composite material support plate.

The present invention can obtain following technical effect:

The molding device provided by the present invention improves the problem of misalignment between the upper and lower parts of the H-beam structure through the positioning device, and ensures the dimension accuracy of the product shape and surface profile through the use of pressure equalizing plates to ensure that the product meets the use requirements. At the same time, the forming method provided by the invention can simplify the forming process for easy operation, and adopt the autoclave forming process to improve the quality of the H-beam structural web.

Description of drawings

Fig. 1 is a schematic structural view of an H-beam structure composite support plate forming device provided according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a positioning device in a forming device for a composite support plate with an H-beam structure according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the appearance of the H-beam structure composite material support plate manufactured according to the forming method provided by the embodiment of the present invention.

Reference signs therein include:

Base plate 1, split flap 2, pressure equalizing plate 3, web plate 4, wing plate 5.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same blocks are denoted by the same reference numerals. With the same reference numerals, their names and functions are also the same. Therefore, its detailed description will not be repeated.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

Figure 1 shows the structure of an H-beam structure composite support plate forming device provided according to an embodiment of the present invention, including a base plate, split flaps, a positioning device and a pressure equalizing plate, the split flaps are installed in combination with the base plate, and the positioning device is used to fix the base plate and The location of the split flaps prevents misalignment during assembly, and the pressure equalizing plate is placed on the periphery of the assembled substrate and split flaps to ensure the overall dimensions of the product.

Fig. 2 shows the structure of the positioning device in the forming device for the support plate of the H-beam structure composite material provided according to the embodiment of the present invention.

The molding device is equipped with a positioning device to improve the problem of misalignment between the upper and lower parts of the H-beam structure, and through the use of pressure equalizing plates to ensure the accuracy of the product's shape and contour dimensions, and to ensure that the product meets the use requirements.

The forming method of a kind of H-beam structure composite support plate provided by the invention comprises the following steps:

S1. Making the H-beam structure composite support plate forming device.

S2. Prepare a prepreg comprising a matrix material and a reinforcing material.

The base material is cyanate resin, the reinforcement material is T700 carbon fiber, and the prepreg is prepared by hot-melt preparation process.

S3. Assemble the splits of the molding device. Use prepregs to lay webs on the splits. After laying 8-12 layers, perform vacuum preloading to discharge air bubbles to make the layers of prepregs more compact.

Laying up the web on the split using prepreg consists of the following steps:

The entire support plate is divided into two symmetrical parts with the mid-plane of the web as the symmetrical plane, and the prepregs are placed separately with each side of the web as the 0° direction, and the corner position of the support plate ± 45° lap laying to ensure the continuity of the fiber layup and the overall structural strength.

S4. Use the positioning device in the molding device to fix the positions of the substrate and the splits, assemble the substrate and the splits, and use prepreg to wrap the joints of the upper and lower parts of the splits.

The base plate and splits are assembled using dowels and bolts.

S5. Remove the positioning device, and use prepreg to lay the wing plate;

S6. After the wing plate is laid, the equalizing plates in the forming device are placed on the outside of the wing plate in turn to closely adhere to the prepreg to ensure the outer shape of the product wing plate;

S7, performing autoclave curing molding on the prepreg;

The process conditions of autoclave curing molding are: vacuum degree not greater than -0.095MPa, curing temperature 130°C-180°C, pressure 0.2MPa-0.3MPa.

S8, removing the base plate, the split flap and the equalizing plate to obtain the H-beam structure composite support plate.

The forming method provided by the invention can simplify the forming process and facilitate operation, and adopts the autoclave forming process to improve the quality of the web plate of the H-beam structure.

Fig. 3 shows the appearance of the H-beam structure composite material support plate manufactured according to the forming method provided by the embodiment of the present invention.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can 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 the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

The above specific implementation manners of the present invention do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and modifications made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (9)

1. A kind of H-beam structure composite material supporting plate forming device, it is characterized in that, comprise base plate, split and pressure equalizing plate, described split and described base plate are combined installation, and described pressure equalizing plate is placed on the described combination after installation The periphery of the substrate and split flaps ensures the overall dimensions of the product. 2. The H-beam structure composite material supporting plate forming device according to claim 1, wherein the split flap is formed by splicing and combining a plurality of parts, and each part can be disassembled and installed independently, which is convenient for demoulding of the product. 3. The H-beam structure composite support plate molding device according to claim 1, wherein the molding device also includes a positioning device for fixing the positions of the upper and lower parts of the base plate and the split flaps to prevent Dies misaligned during assembly. 4. a forming method of H-beam structure composite support plate, is characterized in that, comprises the steps: S1, making the H-beam structure composite material support plate forming device described in claim 3; S2, preparing a prepreg comprising a matrix material and a reinforcing material; S3. Assemble the splits of the forming device, use the prepreg to lay webs and wing plates on the splits, and vacuumize and pre-press after laying 8-12 layers, and discharge air bubbles to make the prepreg The material layer is more compact; S4. Use the positioning device in the molding device to fix the positions of the upper and lower parts of the substrate and the splits, assemble the substrate and the splits, and use the prepreg to wrap the upper and lower parts of the splits the docking point; S5. Remove the positioning device, and use the prepreg to place the wing plate; S6. After the wing plate is laid, place the pressure equalizing plate in the forming device on the outside of the wing plate in order to closely adhere to the prepreg, so as to ensure the outer dimension of the product wing plate; S7, performing autoclave curing molding on the prepreg; S8. Dismantling the base plate, split flaps and pressure equalizing plate to obtain an H-beam structure composite support plate. 5. The molding method of the H-beam structure composite material support plate according to claim 4, characterized in that, in the step S2, the base material is selected from cyanate resin, and the reinforcing material is selected from T700 grade carbon fiber, the The above-mentioned prepregs are prepared by a hot-melt preparation process. 6. The molding method of the H-beam structure composite material support plate according to claim 4, characterized in that, in the step S3, the use of prepreg to lay the web on the split comprises the following steps: The entire support plate is divided into two symmetrical parts with the middle surface of the web as the symmetrical plane, and the prepregs are laid separately using the prepregs. The corner position of the board is lapped at ±45° to ensure the continuity of the fiber layup and the overall structural strength. 7 . The method for forming a support plate made of composite material with an H-beam structure according to claim 4 , wherein, in the step S4 , the base plate and the split flaps are assembled using positioning pins and bolts. 8. The molding method of the H-beam structure composite material support plate according to claim 4, characterized in that, in the step S7, the process conditions of the autoclave curing molding are: the degree of vacuum is not greater than -0.095MPa, The curing temperature is 130℃～180℃, and the pressure is 0.2MPa-0.3MPa. 9. An H-beam structure composite material support plate, characterized in that it is manufactured by the molding method described in any one of claims 4-8.

Images