Airfoil wall plate curing forming tool and using method thereof

Abstract

The invention belongs to the technical field of composite material wallboard manufacturing, and discloses an airfoil wallboard curing forming tool and a using method thereof. The airfoil wallboard curing forming tool comprises a first forming mold, a skin, a second forming mold, a stringer and a plurality of cover plates. The skin is formed on the first forming mold, and the multiple second forming molds are detachably located on the first forming mold at intervals. The stringers are formed in the second forming dies, the stringers and the second forming dies are arranged in a one-to-one correspondence mode, the stringers are provided with first areas, first gaps are formed between the adjacent stringers in the first areas, and second gaps are formed between the adjacent second forming dies. The cover plates are in one-to-one correspondence with the second gaps, the cover plates cover the stringer and are located in the second gaps, the cover plates are provided with notches corresponding to the first gaps, the notches are provided with first barrier strips, and the first barrier strips cover the first gaps. The curing pressurization sufficiency can be improved, and the curing forming quality is improved.

Description

Technical Field

[0001] This invention relates to the field of composite material wall panel manufacturing technology, and in particular to a wing-shaped wall panel curing and molding tooling and its application method. Background Technology

[0002] With the continuous development of aviation technology and the increasing complexity of aircraft design, practical engineering research and development tasks have placed new demands on the structure of wet stringer stiffened panels. In practical applications, the structure of wet stringer stiffened panels at the wing root, as a structurally complex and critical part of the aircraft, has undergone significant changes.

[0003] In the wing root region, due to the overall structural layout and force transmission requirements of the aircraft, the spacing between adjacent stringer flanges becomes smaller, and the net dimensions of the stringer flanges are also strictly limited. The smaller stringer flange spacing makes it difficult to implement traditional stringer forming tooling design ideas. The tooling needs to be designed to match the shape and size of the stringer more precisely, and any slight deviation may cause quality problems in the stringer during the forming process.

[0004] Existing mold structures have significant shortcomings in ensuring sufficient pressure during the curing of wet stringers. For example, in areas where the stringer flanges are not fully enclosed by the mold, pressure may not be effectively transmitted, leading to internal defects in these areas. These internal defects not only reduce the strength and stiffness of the wet stringer but may also cause safety hazards during aircraft service, such as the initiation and propagation of fatigue cracks, seriously affecting the aircraft's service life and flight safety. Summary of the Invention

[0005] The purpose of this invention is to provide a curing and molding fixture for wing panels and its application method, which aims to solve the problems in the prior art where the small spacing between stringer flanges makes the design and processing of the molding fixture difficult, and the existing fixtures cannot guarantee sufficient pressure during curing of wet stringers. This curing and molding fixture for wing panels and its application method can improve the sufficiency of curing pressure and improve the quality of curing and molding.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The tooling for curing and molding wing-shaped panels includes:

[0008] First molding die;

[0009] The skin is formed in the first forming mold;

[0010] Multiple second molding dies are provided, and the multiple second molding dies are spaced apart and detachably positioned on the first molding die;

[0011] A stringer is formed in the second forming mold. Multiple stringers are provided, and the multiple stringers and the multiple second forming molds are arranged in a one-to-one correspondence. The stringer is set on the skin. The stringer has a first region. In the first region, a first gap is formed between adjacent stringers, and a second gap is formed between adjacent second forming molds.

[0012] Multiple cover plates correspond one-to-one with multiple second gaps. The cover plates cover the stringer and are located in the second gaps. The cover plates have notches corresponding to the first gaps. The notches are provided with first stop bars, and the first stop bars cover the first gaps.

[0013] In some possible implementations, the second forming mold includes a first mold and a second mold that fit together, the first mold and the second mold together forming a cavity for receiving the material layer for laying the stringer, a second baffle is provided between the first mold and the second mold, and a third baffle is provided between the first mold and the skin, and between the second mold and the skin.

[0014] In some possible implementations, the first mold includes at least two first segment molds detachably connected along the length direction; the second mold includes at least two second segment molds detachably connected along the length direction.

[0015] In some possible implementations, both the second and third baffles are made of silicone rubber.

[0016] In some possible implementations, the stringer has a second region in which the second molding die wraps around both sides of the stringer, and a stop is provided between the cover plate and the skin at the junction of the first region and the second region.

[0017] In some possible implementations, the stop is made of silicone rubber.

[0018] In some possible implementations, the cover plate is made of a composite material.

[0019] In some possible implementations, the first baffle is made of silicone rubber.

[0020] In some possible implementations, the first molding die is made of metal.

[0021] The method of using the wing panel curing and molding fixture, applied to the wing panel curing and molding fixture as described in any of the above embodiments, includes the following steps:

[0022] Assemble the second molding mold and lay the material layer of the stringer onto the second molding mold;

[0023] The second molding die is installed and positioned on top of the first molding die;

[0024] Install the cover plate and the first stop bar.

[0025] The beneficial effects of this invention are:

[0026] The wing panel curing and molding fixture provided by this invention, by setting a cover plate, during curing, is used to cover the part of the stringer that cannot be enveloped by the second molding mold, thereby improving the sufficiency of curing pressure and improving the curing quality; by setting a first stop bar, which works in conjunction with the second molding mold and the cover plate, it can compensate for the dimensional deviation between the second molding mold and the cover plate; the setting of the cover plate and the first stop bar can reduce the structural design difficulty of the second molding mold, avoid structural interference caused by the first gap being too small, and at the same time improve the curing quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the wing panel curing and molding tooling provided in an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 Sectional view at point AA;

[0029] Figure 3 yes Figure 2 A magnified view of a section at point D;

[0030] Figure 4 yes Figure 2 A magnified view of a section at point E in the middle;

[0031] Figure 5 yes Figure 1 Sectional view at point BB;

[0032] Figure 6 yes Figure 1 Sectional view at CC;

[0033] Figure 7 This is a schematic diagram of the assembly direction of the segmented mold provided in an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the assembly direction of the first mold and the second mold provided in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the second molding die formed after the first mold and the second mold are assembled according to an embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the assembly direction of the second molding die on the positioning component provided in an embodiment of the present invention;

[0037] Figure 11 This is a partial exploded view of the wing panel curing and molding tooling provided in an embodiment of the present invention.

[0038] In the picture:

[0039] 100, First forming mold; 200, Skin; 300, Second forming mold; 310, First mold; 311, First segment mold; 320, Second mold; 321, Second segment mold; 400, Long stringer; 410, First area; 420, Second area; 500, Cover plate; 600, First stop bar; 700, Second stop bar; 800, Third stop bar; 900, Stop block; 1000, Positioning component; 1100, First gap. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] like Figures 1 to 11As shown, the present invention provides a wing panel curing and molding fixture, including a first molding die 100, a skin 200, a second molding die 300, a stringer 400, and multiple cover plates 500. The skin 200 is formed on the first molding die 100, and multiple second molding dies 300 are provided, spaced apart and detachably positioned on the first molding die 100. For example, a positioning element 1000 is provided on the first molding die 100, and the second molding dies 300 are detachably inserted into the positioning groove of the positioning element 1000, facilitating disassembly and assembly. The positioning element 1000 can effectively improve the installation accuracy of the second molding dies 300. A stringer 400 is formed on a second forming mold 300. Multiple stringers 400 are provided, with each stringer 400 corresponding to one of the multiple second forming molds 300. The stringers 400 are mounted on the skin 200. Each stringer 400 has a first region 410. A first gap 1100 is formed between adjacent stringers 400 in the first region 410, and a second gap is formed between adjacent second forming molds 300. Optionally, the stringer 400 can be shaped as an inverted T, an I-beam, or an L. Multiple cover plates 500 correspond one-to-one with multiple second gaps. The cover plates 500 cover the stringers 400 and are located within the second gaps. Each cover plate 500 has a notch corresponding to the first gap 1100, and a first stop bar 600 is provided at the notch, covering the first gap 1100.

[0045] The wing panel curing fixture provided in this embodiment, by setting a cover plate 500, is used to cover the part of the stringer 400 that cannot be enveloped by the second forming mold 300 during curing, thereby improving the sufficiency of curing pressure and improving the curing quality. By setting a first baffle 600, which works in conjunction with the second forming mold 300 and the cover plate 500, the dimensional deviation between the second forming mold 300 and the cover plate 500 can be compensated. The setting of the cover plate 500 and the first baffle 600 can reduce the structural design difficulty of the second forming mold 300, avoid structural interference caused by the first gap 1100 being too small, and at the same time improve the curing quality.

[0046] Optionally, the stringer 400 has a second region 420. At the second region 420, a second molding die 300 wraps around both sides of the stringer 400. At the connection between the first region 410 and the second region 420, a stop 900 is provided between the cover plate 500 and the skin 200. The stop 900 is used to cover the transition area of ​​the stringer 400. During curing and heating, the stringer 400 expands, and the stop 900 provides lateral compressive force to the stringer 400, ensuring the molding quality of the side facade. In this embodiment, the stringer 400 is configured as an inverted T-shape. The stringer 400 includes a first and second perpendicular plate, connected to the middle portion of the first plate. The first plate is attached to the skin 200. Along the length of the stringer 400, the width of the first plate varies. The portion with a larger width forms the first region 410 of the stringer 400, and the portion with a smaller width forms the second region 420. In other embodiments, the first region 410 and the second region 420 can be set as needed to meet the molding requirements.

[0047] As a preferred option, the material of the stop block 900 is silicone rubber. Silicone rubber has good high temperature resistance, as well as good elasticity and flexibility, which can adapt to the sealing or buffering requirements under different working conditions.

[0048] Optionally, the cover plate 500 is made of composite material. Composite material can effectively reduce the weight of the cover plate 500, has good heat resistance, and has a low coefficient of thermal expansion, which can reduce deformation. For example, the composite material can be glass fiber composite material.

[0049] Optionally, the first stop bar 600 is made of silicone rubber, which has good high temperature resistance, as well as good elasticity and flexibility, and can form a good fit with the second molding mold 300 and the cover plate 500.

[0050] Optionally, the first forming mold 100 is made of metal. Metal has excellent mechanical properties, is not easily deformed or damaged during long-term use, and has a long service life; moreover, metal molds have high-temperature airtightness and high dimensional forming accuracy. For example, the first forming mold 100 can be made of mold steel or aluminum alloy.

[0051] In some possible embodiments, the second molding die 300 includes a first die 310 and a second die 320 that meet each other. The first die 310 and the second die 320 together form a cavity for receiving the material layer for laying the stringer 400. A second baffle 700 is provided between the first die 310 and the second die 320. A third baffle 800 is provided between the first die 310 and the skin 200, and between the second die 320 and the skin 200. The second baffle 700 is used to achieve a seal between the first die 310 and the second die 320; the third baffle 800 is used to achieve a seal between the second molding die 300 and the edge of the stringer 400 to prevent curing and glue flow. Optionally, a first groove for receiving the second baffle 700 may be provided on the first die 310 or the second die 320; a second groove for receiving the third baffle 800 may be provided on both the first die 310 and the second die 320.

[0052] Optionally, the second stop bar 700 and the third stop bar 800 are both made of silicone rubber. Silicone rubber has good high temperature resistance and can maintain elasticity and sealing performance over a wide temperature range, and fit tightly against the sealing surface.

[0053] Optionally, the first mold 310 includes at least two first segment molds 311 detachably connected along its length; the second mold 320 includes at least two second segment molds 321 detachably connected along its length. This facilitates disassembly, assembly, and storage. For example, adjacent first segment molds 311 can be sealed together via a snap-fit ​​and slot structure; adjacent second segment molds 321 can also be sealed together via a snap-fit ​​and slot structure.

[0054] It should be noted that the specific dimensions of the first stop bar 600, the second stop bar 700, the third stop bar 800, the stop block 900, and the cover plate 500 in this embodiment can all be adjusted as needed to achieve their respective functions.

[0055] This embodiment also provides a method for using a wing panel curing and molding fixture, including the following steps:

[0056] S1. Assemble the second forming mold 300 and lay the material layer of the stringer 400 onto the second forming mold 300;

[0057] S2. Install and position the second forming mold 300 on the first forming mold 100;

[0058] S3. Install cover plate 500 and first stop bar 600.

[0059] The method of using the wing panel curing and molding tooling provided in this embodiment is simple to operate.

[0060] like Figures 7 to 9As shown, optionally, when assembling the second forming mold 300 and applying the material layer of the stringer 400 to the second forming mold 300, at least two first segment molds 311 and at least two second segment molds 321 need to be installed sequentially to form separate first molds 310 and second molds 320. Then, the material layer is applied to the first mold 310 or the second mold 320, the second stop bar 700 is installed, and finally the first mold 310 and the second mold 320 are assembled together. The order of applying the material layer and installing the second stop bar 700 can be adjusted; that is, the material layer can be applied first, and then the second stop bar 700 can be installed, or the second stop bar 700 can be installed first, and then the material layer can be applied.

[0061] like Figure 10 As shown, installing and positioning the second molding mold 300 on the first molding mold 100 includes installing third stop bars 800 on the first mold 310 and the second mold 320 respectively, using special equipment to transport the second molding mold 300 above the first molding mold 100, and precisely positioning and installing the second molding mold 300 on the positioning member 1000.

[0062] Optionally, after the second molding mold 300 is installed and positioned in the first molding mold 100, and before the cover plate 500 and the first stop bar 600 are installed, the stop block 900 needs to be installed at the connection between the first region 410 and the second region 420 to fill the transition area between the first region 410 and the second region 420.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A tooling for curing and molding wing-shaped wall panels, characterized in that, include: First molding die (100); Skin (200) is formed in the first molding die (100); Multiple second molding dies (300) are provided, and the multiple second molding dies (300) are spaced apart and detachably positioned on the first molding die (100); A stringer (400) is formed in the second forming mold (300). Multiple strings (400) are provided, and the multiple strings (400) and the multiple second forming molds (300) are arranged in a one-to-one correspondence. The strings (400) are provided on the skin (200). The strings (400) have a first region (410). In the first region (410), a first gap (1100) is formed between adjacent strings (400), and a second gap is formed between adjacent second forming molds (300). Multiple cover plates (500) correspond one-to-one with multiple second gaps. The cover plates (500) cover the stringer (400) and are located in the second gaps. The cover plates (500) have notches corresponding to the first gaps (1100). The notches are provided with first stop bars (600), and the first stop bars (600) cover the first gaps (1100).

2. The wing panel curing and molding fixture according to claim 1, characterized in that, The second forming mold (300) includes a first mold (310) and a second mold (320) that are mated to each other. The first mold (310) and the second mold (320) together form a cavity for receiving the material layer of the stringer (400). A second baffle (700) is provided between the first mold (310) and the second mold (320). A third baffle (800) is provided between the first mold (310) and the skin (200) and between the second mold (320) and the skin (200).

3. The wing panel curing and molding fixture according to claim 2, characterized in that, The first mold (310) includes at least two first segment molds (311) that are detachably connected along the length direction; the second mold (320) includes at least two second segment molds (321) that are detachably connected along the length direction.

4. The wing panel curing and molding fixture according to claim 2, characterized in that, The second baffle (700) and the third baffle (800) are both made of silicone rubber.

5. The wing panel curing and molding fixture according to claim 1, characterized in that, The stringer (400) has a second region (420), in which the second molding die (300) wraps around both sides of the stringer (400), and at the connection between the first region (410) and the second region (420), a stop (900) is provided between the cover plate (500) and the skin (200).

6. The wing panel curing and molding fixture according to claim 5, characterized in that, The stop (900) is made of silicone rubber.

7. The wing panel curing and molding fixture according to claim 1, characterized in that, The cover plate (500) is made of composite material.

8. The wing panel curing and molding fixture according to claim 1, characterized in that, The first baffle (600) is made of silicone rubber.

9. The wing panel curing and molding fixture according to claim 1, characterized in that, The first molding die (100) is made of metal.

10. The method of using the wing panel curing and molding fixture, characterized in that, The tooling for curing and molding wing panel as described in any one of claims 1-9, the method of use includes the following steps: Assemble the second molding mold (300) and lay the material layer of the stringer (400) onto the second molding mold (300); The second molding die (300) is installed and positioned on the first molding die (100); Install the cover plate (500) and the first stop bar (600).

Images