H-beam structure composite material support plate and forming method and forming device thereof

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 petal, a positioning device and a pressure equalizing plate; the forming method of the H-beam structure composite material support plate includes: making a support plate forming device, preparing prepreg, assembling a forming device and laying the prepreg, curing and forming the prepreg in an autoclave, and dismantling the forming device to obtain the H-beam structure composite material support plate. The present invention can improve the internal quality of the product and the product appearance surface size requirements, avoid quality defects at the web position affecting the product strength requirements, and ensure the accuracy of the product appearance surface to avoid misalignment that leads to product scrapping.

Description

Technical Field

[0001] 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 a forming method and a forming device thereof. Background Art

[0002] In recent years, due to the rapid development of composite materials due to their excellent performance, various industrial fields such as the aerospace industry and the high-speed rail industry have carried out in-depth research on composite materials. Among them, H-beam structure composite parts are mostly used in the 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 composite material field and the continuous improvement of requirements, such support structure materials are constantly updated, the structure is constantly optimized and becomes more and more complex, and the requirements for the molding and manufacturing process of composite structural parts are also constantly increasing.

[0003] At present, there are two commonly used forming methods for composite H-beam structures: one is the metal die forming process. Due to the structural form of the product, the web of the H-beam structure is very likely to have flaws, which affects the internal quality. In addition, 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 forming process. The mold structure and process implementation of this forming process are relatively simple, but the outer surface of the product obtained by this forming process will have large steps, poor dimensional accuracy, cannot meet the use requirements, and is very likely to be scrapped. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and to propose an H-beam structure composite material support plate and a forming method and a forming device thereof. The H-beam structure composite material support plate forming device improves the problem of misalignment between the upper and lower parts of the H-beam structure through a positioning device; the forming method of the H-beam structure composite material support plate can solve the problems of complex forming process operation flow and easy defects in the internal quality of the H-shaped structure web.

[0005] To achieve the above object, the present invention adopts the following specific technical solutions:

[0006] The present invention provides an H-beam structure composite material support plate forming device, which includes a base plate, petals and a pressure equalizing plate. The petals are installed in combination with the base plate, and the pressure equalizing plate is placed on the periphery of the combined and installed base plate and petals to ensure the product's external dimensions.

[0007] Furthermore, the petals are assembled from a plurality of parts, and each part can be disassembled and installed separately, so that the product can be easily demoulded.

[0008] Furthermore, the molding device also includes a positioning device for fixing the positions of the base plate and the petals to prevent misalignment during assembly.

[0009] The present invention provides a method for forming a composite material support plate of an H-beam structure, comprising the following steps:

[0010] S1. A forming device for manufacturing a composite material support plate of an H-beam structure;

[0011] S2, preparing a prepreg comprising a matrix material and a reinforcing material;

[0012] S3, assemble the petals of the molding device, lay the web and wing plates on the petals using prepreg, and perform vacuum pre-pressing after laying 8-12 layers to remove bubbles and make the prepreg layers more compact;

[0013] S4, using the positioning device in the molding device to fix the positions of the substrate and the petals, assembling the substrate and the petals, and using the prepreg to wrap the joints between the upper and lower petals;

[0014] S5. Remove the positioning device and lay the wing panel using prepreg;

[0015] S6. After the wing panel is laid, the pressure equalizing plates in the molding device are placed on the outside of the wing panel in sequence to fit closely with the prepreg to ensure the overall dimensions of the product wing panel;

[0016] S7, performing autoclave curing and molding on the prepreg;

[0017] S8. Remove the base plate, petals and pressure equalizing plate to obtain the H-beam structure composite material support plate.

[0018] Furthermore, the matrix material is cyanate resin, the reinforcement material is T700 grade carbon fiber, and the prepreg is prepared by a hot melt preparation process.

[0019] Furthermore, laying the web on the petals using the prepreg comprises the following steps:

[0020] The entire support plate is divided into two symmetrical parts with the middle surface of the web as the symmetry plane and the prepreg is laid separately. The prepreg is laid with each edge of the web as the 0° direction and overlapped at ±45° at the corners of the support plate to ensure the continuity of the fiber layup and the overall structural strength.

[0021] Further, the base plate and the petals are assembled using dowel pins and bolts.

[0022] Furthermore, the process conditions of autoclave curing molding are: vacuum degree not greater than -0.095MPa, curing temperature 130°C to 180°C, and pressure 0.2MPa to 0.3MPa.

[0023] The present invention provides an H-beam structure composite material support plate, which is manufactured by a forming method of an H-beam structure composite material support plate.

[0024] The present invention can achieve the following technical effects:

[0025] The forming device provided by the present invention improves the problem of misalignment between the upper and lower parts of the H-beam structure through a positioning device, and ensures the accuracy of the contour size of the product surface by using a pressure plate, ensuring that the product meets the use requirements. At the same time, the forming method provided by the present invention can simplify the forming process and facilitate operation, and improve the quality of the web of the H-beam structure by using a hot autoclave forming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an H-beam structure composite material support plate forming device provided according to an embodiment of the present invention.

[0027] Figure 2 It is a structural schematic diagram of a positioning device in an H-beam structure composite material support plate forming device provided according to an embodiment of the present invention.

[0028] Figure 3 It is a schematic diagram of the appearance of an H-beam structure composite material support plate product manufactured by the molding method provided in an embodiment of the present invention.

[0029] Reference numerals include:

[0030] Base plate 1, petals 2, pressure equalizing plate 3, web plate 4, wing plate 5. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0033] Figure 1 The structure of an H-beam structure composite material support plate forming device provided according to an embodiment of the present invention is shown, including a base plate, a petal, a positioning device and a pressure equalizing plate. The petal is installed in combination with the base plate. The positioning device is used to fix the position of the base plate and the petal to prevent misalignment during assembly. The pressure equalizing plate is placed on the periphery of the combined and installed base plate and the petal to ensure the product's external dimensions.

[0034] Figure 2The structure of the positioning device in the H-beam structure composite material support plate forming device provided according to an embodiment of the present invention is shown.

[0035] The forming device improves the problem of misalignment between the upper and lower parts of the H-beam structure by setting a positioning device, and ensures the accuracy of the contour size of the product surface by using an equalizing plate to ensure that the product meets the use requirements.

[0036] The present invention provides a method for forming a composite material support plate of an H-beam structure, comprising the following steps:

[0037] S1. A forming device for manufacturing a composite material support plate of an H-beam structure.

[0038] S2. Preparing a prepreg comprising a matrix material and a reinforcing material.

[0039] The matrix material is cyanate resin, the reinforcement material is T700 grade carbon fiber, and the prepreg is prepared by hot melt preparation process.

[0040] S3. Assemble the petals of the molding device, use prepreg to lay the web and wing plates on the petals, and perform vacuum pre-pressing after laying 8-12 layers to expel bubbles and make the prepreg layers more compact.

[0041] Laying down the web on the flap using prepreg includes the following steps:

[0042] The entire support plate is divided into two symmetrical parts with the middle surface of the web as the symmetry plane and the prepreg is laid separately. The prepreg is laid with each edge of the web as the 0° direction and overlapped at ±45° at the corners of the support plate to ensure the continuity of the fiber layup and the overall structural strength.

[0043] S4. Use the positioning device in the molding device to fix the positions of the substrate and the petals, assemble the substrate and the petals, and use prepreg to wrap the joints between the upper and lower petals.

[0044] The base plate and the petals are assembled using dowel pins and bolts.

[0045] S5. Remove the positioning device and lay the wing panel using prepreg;

[0046] S6. After the wing panel is laid, the pressure equalizing plates in the molding device are placed on the outside of the wing panel in sequence to fit closely with the prepreg to ensure the overall dimensions of the product wing panel;

[0047] S7, performing autoclave curing and molding on the prepreg;

[0048] The process conditions for autoclave curing molding are: vacuum degree not greater than -0.095MPa, curing temperature 130℃~180℃, pressure 0.2MPa-0.3MPa.

[0049] S8. Remove the base plate, petals and pressure equalizing plate to obtain the H-beam structure composite material support plate.

[0050] The forming method provided by the present invention can simplify the forming process and facilitate operation, and adopts the autoclave forming process to improve the quality of the web of the H-beam structure.

[0051] Figure 3 The figure shows the appearance of a composite material support plate product of an H-beam structure manufactured by a molding method provided in an embodiment of the present invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0054] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for forming a composite support plate of an H-beam structure, characterized in that: The steps include: S1. A forming device for manufacturing a composite support plate of an H-beam structure includes a base plate, a petal and a pressure equalizing plate. The petal is assembled with the base plate, and the pressure equalizing plate is placed on the periphery of the assembled base plate and the petal to ensure the outer dimensions of the product; The petals are assembled from a plurality of parts, each of which can be disassembled and installed separately, so as to facilitate demoulding of the product; The molding device also includes a positioning device for fixing the positions of the upper and lower parts of the substrate and the petals to prevent the mold from being misplaced during assembly; S2, preparing a prepreg comprising a matrix material and a reinforcing material; S3, assembling the petals of the molding device, laying the web and wing plates on the petals using the prepreg, and performing vacuum pre-pressing after laying 8-12 layers to remove bubbles and make the prepreg layers more compact; S4, using the positioning device in the molding device to fix the positions of the upper and lower parts of the substrate and the petals, assembling the substrate and the petals, and using the prepreg to wrap the joints of the upper and lower parts of the petals; S5, removing the positioning device and using the prepreg to lay the wing panel; S6. After the wing panel is laid, the pressure equalizing plates in the molding device are sequentially placed on the outside of the wing panel to closely fit the prepreg to ensure the outer dimensions of the product wing panel; S7, subjecting the prepreg to autoclave curing and molding; S8. Remove the base plate, petals and pressure equalizing plate to obtain an H-beam structure composite material support plate.

2. The method for forming a composite material support plate of an H-beam structure according to claim 1, characterized in that: In the step S2, the matrix material is cyanate resin, the reinforcing material is T700 grade carbon fiber, and the prepreg is prepared by a hot melt preparation process.

3. The method for forming a composite material support plate of an H-beam structure according to claim 1, characterized in that: In the step S3, laying the web on the petals using the prepreg comprises the following steps: The entire support plate is divided into two symmetrical parts with the middle surface of the web as the symmetry plane and the prepreg is used to lay them separately. The prepreg is laid with each edge of the web as the 0° direction and overlapped at ±45° at the corner position of the support plate to ensure the continuity of the fiber layer and the overall structural strength.

4. The method for forming a composite material support plate of an H-beam structure according to claim 1, characterized in that: In the step S4, the base plate and the petals are assembled using positioning pins and bolts.

5. The method for forming a composite material support plate of an H-beam structure according to claim 1, characterized in that: In step S7, the process conditions of the autoclave curing molding are: vacuum degree not greater than -0.095 MPa, curing temperature 130°C to 180°C, and pressure 0.2MPa to 0.3MPa.

6. A composite material support plate of an H-beam structure, characterized in that: The invention is manufactured by the molding method described in any one of claims 1 to 5.

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