Ribbed wallboard manufacturing mold

Abstract

The utility model belongs to the technical field of aircraft manufacturing, and discloses a stiffened wallboard manufacturing mold. The stiffened wall plate manufacturing mold comprises a mold body, an air bag and an air bag protection tool, the air bag protection tool comprises a base body, the base body is attached to the cavity wall of a cavity, one end of the base body can be attached to a stringer plate in the center line direction of the cavity, the air bag protection tool further comprises two transition parts, and the two transition parts are arranged in the center line direction of the cavity. The transition part comprises a first end and a second end, the first end of the transition part is used for being attached to the end face of a rhodomyrtus tomentosa strip, the first end coincides with the outline of the end face of the rhodomyrtus tomentosa strip in the direction of the center line of the cavity, the transition part is in smooth transition from the first end to the second end, and the second end of the transition part is flush with the cavity wall of the cavity. Therefore, the air bag can be prevented from being compacted at the joint of the end of the rhodomyrtus tomentosa strip and the mold, the internal pressure of the air bag is prevented from being overhigh or the bag is prevented from being exploded, and the quality of the stiffened wall plate is prevented from being influenced.

Description

Technical Field

[0001] This utility model relates to the field of aircraft manufacturing technology, and in particular to a mold for manufacturing stiffened wall panels. Background Technology

[0002] Stiffened panels are a common structural form in aircraft manufacturing. Among them, the cap-shaped stringer stiffened panel is widely used in the manufacture of fuselage sections for large passenger aircraft due to its excellent structural stability. The cap-shaped stringer stiffened panel consists of stringers, twill strips, and skin. Its manufacturing generally employs autoclave technology, mainly including mold cleaning, material laying, vacuum bag pressurization, curing, and post-processing. Because the ends of the stringers are relatively sharp, they can easily tear the vacuum bag during the pressurization and curing processes.

[0003] In the prior art, a cap-shaped stringer end protective sleeve is used to prevent the vacuum bag from being torn by embedding the protective sleeve into the stringer end. However, due to the complex end area formed by the twist strip, stringer, skin, and mold, there is a steep area between the twist strip end and the mold when the vacuum bag is pressurized. This may cause the vacuum bag to be compacted at the connection between the twist strip end and the mold, which may lead to overpressure inside the vacuum bag or "burst" of the bag, affecting the quality of the reinforced wall panel. Utility Model Content

[0004] The purpose of this utility model is to provide a mold for manufacturing reinforced wall panels. This mold can prevent the air bag from being compacted at the connection between the end of the twist strip and the mold, which would lead to excessive pressure inside the air bag or "bursting" the air bag and affect the quality of the reinforced wall panel.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A mold for manufacturing reinforced wall panels is provided. The mold is used to manufacture reinforced wall panels. The reinforced wall panels include a skin, a long stringer, and two tweezers. The long stringer is a soft material before curing and is flexible. After curing, it is a plate-shaped material and is rigid. The long stringer and the skin form a cavity. The two tweezers are located in the cavity and are respectively embedded at the two included angles between the skin and the long stringer. Along the center line of the inner cavity, the skin, the tweezers, and the two ends of the long stringer are all flush.

[0007] The mold for manufacturing reinforced wall panels includes a mold body and an air bag. The mold body has a cavity, the length of which is configured to be greater than the length of the stringer. A portion of the air bag is located inside the cavity, and another portion of the air bag extends out of the cavity. The cavity wall is used to fit the stringer before curing, and the air bag is used to fill with gas and press the stringer against the cavity wall.

[0008] The reinforced wall panel manufacturing mold also includes an air bag protection fixture, which includes a base body that fits against the cavity wall of the cavity. Along the centerline of the cavity, one end of the base body can fit against the long stringer. The air bag protection fixture also includes two transition parts. Along the centerline of the cavity, the transition parts include a first end and a second end. The first end of the transition part is used to fit against the end face of the twist strip. Along the centerline of the cavity, the first end coincides with the contour of the end face of the twist strip. The transition part smoothly transitions from the first end to the second end, and the second end of the transition part is flush with the cavity wall of the cavity.

[0009] Preferably, the thickness of the substrate is configured to be consistent with the thickness of the truss along the centerline of the cavity.

[0010] Preferably, along the circumference of the twist strip, the twist strip includes a first outer surface, a second outer surface, and a third outer surface that intersect in sequence. The transition portion along the circumference of the twist strip includes a top surface, a first side surface, and a second side surface that intersect in sequence. One end of the top surface, the first side surface, and the second side surface can abut against the first outer surface, the second outer surface, and the third outer surface in a one-to-one correspondence. The first side surface fits against the cavity wall of the mold cavity, and the second side surface fits against the outer surface of the air bag.

[0011] Preferably, the transition portion further includes a transition surface, which intersects with the first side surface to form a first intersection line, intersects with the top surface to form a second intersection line, and intersects with the second side surface to form a third intersection line. Both the second and third intersection lines are closer to the first end than the first intersection line.

[0012] Preferably, the transition surface is an arc-shaped surface.

[0013] Preferably, the intersections of the transition surface with the top surface, the first side surface, and the second side surface are all provided with rounded corners.

[0014] Preferably, the second side surface is an arc surface, and the connection between the top surface and the second side surface is provided with a rounded corner.

[0015] Preferably, the air bag protection fixture also includes two connecting plates, both of which are connected to the base and are located on both sides of the cavity, with the connecting plates and the upper surface of the mold body fitting together.

[0016] Preferably, the base, transition section and connecting plate are integrally formed.

[0017] Preferably, the coefficient of thermal expansion of the airbag protection fixture is configured to match that of the long truss.

[0018] The beneficial effects of this utility model are as follows: It provides a mold for manufacturing reinforced wall panels. The mold for manufacturing reinforced wall panels is equipped with an air bag protection fixture. The first end of the transition part of the air bag protection fixture is in contact with the end face of the twist strip. Along the center line of the cavity, the first end coincides with the contour of the end face of the twist strip. The transition part smoothly transitions from the first end to the second end, and the second end of the transition part is flush with the cavity wall. This avoids the air bag from being compressed at one end due to the steep change of the cavity wall in the direction of the twist strip towards the mold body, which would cause the air bag to over-pressure or "burst" and affect the quality of the reinforced wall panel. Attached Figure Description

[0019] Figure 1 This is an exploded view of the mold for manufacturing reinforced wall panels provided by this utility model;

[0020] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0021] Figure 3 This is a structural diagram of the airbag protection tooling for the reinforced wall panel manufacturing mold provided by this utility model;

[0022] Figure 4 yes Figure 3 A magnified view of part B in the middle section;

[0023] Figure 5 This is an assembly drawing of the reinforcing wall panel manufacturing mold provided by this utility model;

[0024] Figure 6 This is a cross-sectional view of the reinforcing wall panel manufacturing mold provided by this utility model.

[0025] In the diagram: 100, stiffened wall panel; 110, skin; 120, long stringer; 130, twill strip; 140, cavity;

[0026] 1. Mold body; 11. Cavity;

[0027] 2. Airbag;

[0028] 3. Airbag protection fixture; 31. Base; 32. Transition section; 321. Top surface; 322. First side surface; 323. Second side surface; 324. Transition surface; 33. Connecting plate. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, 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, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly 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 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 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.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] Please refer to Figures 1 to 6 This embodiment provides a mold for manufacturing a stiffened wall panel. The mold is used to manufacture a stiffened wall panel 100, which includes a skin 110, a stringer 120, and two twisted strips 130. The stringer 120 is a soft material before curing and has flexibility; after curing, it becomes a rigid plate. The stringer 120 and the skin 110 form a cavity 140. The two twisted strips 130 are located within the cavity 140 and are respectively embedded at the two included angles between the skin 110 and the stringer 120. Along the centerline of the cavity, the ends of the skin 110, the twisted strips 130, and the stringer 120 are all flush. Preferably, the stringer 120 is cap-shaped after curing. The cap-shaped stringer structure has good stability and high axial load transmission efficiency, and is widely used in the aerospace field. Specifically, the skin 110, the stringer 120, and the two twisted strips 130 are all made of carbon fiber material.

[0034] The mold for manufacturing reinforced wall panels includes a mold body 1 and an air bag 2. The mold body 1 has a cavity 11, the length of which is configured to be greater than the length of the long truss 120. A portion of the air bag 2 is located inside the cavity 140, and another portion of the air bag 2 extends out of the cavity 140. The cavity wall of the cavity 11 is used to fit against the long truss 120 before curing, and the air bag 2 is used to fill with gas and press the long truss 120 against the cavity wall of the cavity 11.

[0035] The reinforced wall panel manufacturing mold also includes an air bag protection fixture 3. The air bag protection fixture 3 includes a base 31, which fits against the cavity wall of the cavity 11. Along the center line of the cavity 140, one end of the base 31 can fit against the long stringer 120. The air bag protection fixture 3 also includes two transition parts 32. Along the center line of the cavity 140, the transition part 32 includes a first end and a second end. The first end of the transition part 32 is used to fit against the end face of the twist strip 130. Along the center line of the cavity 140, the first end coincides with the outline of the end face of the twist strip 130. Along the center line of the cavity 140, the transition part 32 smoothly transitions from the first end to the second end, and the second end of the transition part 32 is flush with the cavity wall of the cavity 11. With this configuration, the reinforced wall panel manufacturing mold is equipped with an air bag protection fixture 3. The first end of the transition part 32 of the air bag protection fixture 3 is in contact with the end face of the twist strip 130, and along the center line direction of the cavity 140, the first end coincides with the contour of the end face of the twist strip 130. The transition part 32 smoothly transitions from the first end to the second end, and the second end of the transition part 32 is flush with the cavity wall of the cavity 11. This avoids the air bag 2 from being compressed at one end due to the excessively steep change of the cavity wall of the cavity 11 in the direction of the twist strip 130 toward the mold body 1, which would cause the internal pressure of the air bag 2 to be too high or "burst", affecting the quality of the reinforced wall panel 100.

[0036] Optionally, the thickness of the substrate 31 is configured to be consistent with the thickness of the truss 120 along the centerline of the cavity 140. This configuration ensures a smooth transition at the connection between one end of the substrate 31 and the truss 120, preventing bridging of the air bag 2 during curing due to unevenness at the connection, which could lead to overpressure or bursting of the bag and affect the quality of the reinforced wall panel 100.

[0037] Alternatively, please refer to Figure 3 and Figure 4Along the circumference of the twist strip 130, the twist strip 130 includes a first outer surface, a second outer surface, and a third outer surface that intersect sequentially. The transition portion 32, along the circumference of the twist strip 130, includes a top surface 321, a first side surface 322, and a second side surface 323 that intersect sequentially. One end of the top surface 321, the first side surface 322, and the second side surface 323 can abut against the first outer surface, the second outer surface, and the third outer surface, respectively. The first side surface 322 fits against the cavity wall of the cavity 11, and the second side surface 323 fits against the outer surface of the air bag 2. This arrangement ensures that the first end of the transition portion 32 fits against the end face of the twist strip 130, and that the first end coincides with the contour of the end face of the twist strip 130 along the centerline of the cavity 140. This results in a smooth transition at the connection between the transition portion 32 and the twist strip 130, preventing a "bridging" phenomenon in the air bag 2, which could lead to overpressure or "bursting" inside the bag, affecting the quality of the reinforced wall panel 100.

[0038] Alternatively, please refer to Figure 4 The transition section 32 also includes a transition surface 324. The transition surface 324 intersects with the first side surface 322 to form a first intersection line, the transition surface 324 intersects with the top surface 321 to form a second intersection line, and the transition surface 324 intersects with the second side surface 323 to form a third intersection line. Both the second and third intersection lines are closer to the first end than the first intersection line. This arrangement ensures that the transition surface 324 forms a smooth transition from the first end to the second end along the centerline of the cavity 140, avoiding the "bridging" phenomenon of the air bag 2 during the curing process.

[0039] Optionally, the transition surface 324 is an arc-shaped surface. This design ensures a smooth transition between the transition surface 324 and the cavity wall of the cavity 11, preventing the air bag 2 from bridging at the connection between the transition surface 324 and the cavity wall of the cavity 11 during the curing process, thus ensuring the quality of the reinforced wall panel 100. In some embodiments, the transition surface 324 may also be a slope.

[0040] Optionally, the intersections of the transition surface 324 with the top surface 321, the first side surface 322, and the second side surface 323 are all rounded. This design prevents the intersections of the transition surface 324 with the top surface 321, the first side surface 322, and the second side surface 323 from tearing the air bag 2 during the curing process, which would affect the quality of the reinforced wall panel 100.

[0041] Optionally, the second side surface 323 is an arc surface, and the connection between the top surface 321 and the second side surface 323 is rounded. This design ensures a smooth transition between the second side surface 323 and the cavity wall of the cavity 11, ensuring that the air bag 2 will not be compressed at the connection between the transition surface 324 and the cavity wall of the cavity 11 during the curing process, which could lead to excessive internal pressure or "bursting" of the air bag 2. At the same time, the rounded corner at the connection between the top surface 321 and the second side surface 323 prevents the connection between the top surface 321 and the second side surface 323 from tearing the air bag 2 during the curing process, which could lead to air leakage and affect the quality of the reinforced wall panel 100.

[0042] Alternatively, please refer to Figures 3 to 5 The airbag protection fixture 3 also includes two connecting plates 33, both of which are connected to the base 31 and are located on both sides of the cavity 11. The connecting plates 33 are in contact with the upper surface of the mold body 1. This arrangement ensures that the airbag protection fixture 3 can be stably supported on the upper surface of the mold body 1, facilitating the assembly of the airbag protection fixture 3 and improving the production efficiency of the stiffened wall panel 100.

[0043] Optionally, the base 31, transition section 32, and connecting plate 33 are integrally formed. This configuration simplifies the installation and disassembly process of the airbag protection fixture 3, shortens assembly time, and improves the production efficiency of the stiffened wall panel 100.

[0044] Optionally, the coefficient of thermal expansion of the airbag protection fixture 3 is configured to be consistent with that of the girder 120. Specifically, the airbag protection fixture 3 is made of a high-molecular thermoplastic material, which has the characteristics of high temperature and high pressure resistance. It can adapt to the autoclave processing of the reinforced wall panel 100 while ensuring that the deformation of the airbag protection fixture 3 and the girder 120 is consistent during the autoclave processing. This avoids the misalignment of the first end of the transition part 32 and the end face of the twist strip 130 during the autoclave processing, which would cause the airbag 2 to "bridge" and result in overpressure or "bursting" of the airbag 2, affecting the quality of the reinforced wall panel 100.

[0045] The assembly steps for the mold used to manufacture the reinforced wall panel are as follows:

[0046] First, the pre-cured stringer 120, air bag 2, twill strip 130, and skin 110 are sequentially laid into the mold body 1. Next, along the center line of the cavity 140, the air bag protection fixture 3 is placed into the cavity 11 of the mold body 1, ensuring that the base 31 of the air bag protection fixture 3 is in contact with the cavity wall of the cavity 11, and that one end of the base 31 is in contact with the stringer 120 and twill strip 130 along the center line of the cavity 140. Then, the air bag 2 is inflated, pressurized, and sealed, the stringer 120 is cured, and the air bag 2 is evacuated and degassed. Finally, the degassed air bag 2, air bag protection fixture 3, and mold body 1 are removed sequentially to complete the manufacturing of the stiffened wall panel 100.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mold for manufacturing a reinforced wall panel, the mold being used to manufacture a reinforced wall panel (100), the reinforced wall panel (100) comprising a skin (110), a long truss (120) and two tweezers (130), the long truss (120) being a soft material before curing and having flexibility, and a plate-like, hard material after curing, the long truss (120) and the skin (110) forming a cavity (140), the two tweezers (130) being located in the cavity (140) and respectively embedded at the two included angles between the skin (110) and the long truss (120), the skin (110), the tweezers (130) and the long truss (120) being flush along the centerline of the cavity; The reinforced wall panel manufacturing mold includes a mold body (1) and an air bag (2). The mold body (1) has a cavity (11) with a length greater than that of the stringer (120). A portion of the air bag (2) is located inside the cavity (140), and another portion of the air bag (2) extends out of the cavity (140). The cavity wall of the cavity (11) is used to fit against the stringer (120) before curing, and the air bag (2) is used to fill with gas and press the stringer (120) against the cavity wall of the cavity (11). characterized in that The reinforced wall panel manufacturing mold also includes an air bag protection fixture (3), which includes a base (31) that fits against the cavity wall of the cavity (11) and, along the center line of the cavity (140), one end of the base (31) can fit against the long stringer (120). The air bag protection fixture (3) also includes two transition portions (32). Along the center line of the cavity (140), the transition portion (32) includes a first end and a second end. The first end of the transition portion (32) is used to fit against the end face of the twist strip (130), and along the center line of the cavity (140), the first end coincides with the outline of the end face of the twist strip (130). The transition portion (32) smoothly transitions from the first end to the second end, and the second end of the transition portion (32) is flush with the cavity wall of the cavity (11).

2. The reinforced wallboard manufacturing mold of claim 1, wherein, Along the centerline direction of the cavity (140), the thickness of the substrate (31) is configured to be consistent with the thickness of the truss (120).

3. A manufacturing tool for a web stiffened panel according to claim 1, wherein, Along the circumference of the twist strip (130), the twist strip (130) includes a first outer surface, a second outer surface and a third outer surface that intersect in sequence. The transition portion (32) along the circumference of the twist strip (130) includes a top surface (321), a first side surface (322) and a second side surface (323) that intersect in sequence. One end of the top surface (321), the first side surface (322) and the second side surface (323) can abut against the first outer surface, the second outer surface and the third outer surface respectively. The first side surface (322) fits against the cavity wall of the cavity (11) and the second side surface (323) fits against the outer surface of the air bag (2).

4. A manufacturing tool for a web stiffened panel according to claim 3, wherein, The transition portion (32) further includes a transition surface (324), which intersects with the first side surface (322) to form a first intersection line, intersects with the top surface (321) to form a second intersection line, and intersects with the second side surface (323) to form a third intersection line. Both the second intersection line and the third intersection line are closer to the first end than the first intersection line.

5. The reinforced wallboard manufacturing mold of claim 4, wherein, The transition surface (324) is an arc-shaped surface.

6. The reinforced wallboard manufacturing mold of claim 5, wherein, The transition surface (324) is provided with rounded corners at the intersections with the top surface (321), the first side surface (322), and the second side surface (323).

7. The reinforced wallboard manufacturing mold of claim 6, wherein, The second side surface (323) is an arc surface, and the connection between the top surface (321) and the second side surface (323) is provided with a rounded corner.

8. The reinforced wallboard manufacturing mold of claim 1, wherein, The air bag protection fixture (3) also includes two connecting plates (33), both connecting plates (33) are connected to the base (31), and the two connecting plates (33) are located on both sides of the cavity (11), and the connecting plates (33) are attached to the upper surface of the mold body (1).

9. The reinforced wallboard manufacturing mold of claim 8, wherein, The base (31), the transition section (32), and the connecting plate (33) are integrally formed.

10. The manufacturing tool for a web-stiffened panel according to any one of claims 1 to 9, wherein The coefficient of thermal expansion of the airbag protection fixture (3) is configured to be consistent with that of the long truss (120).

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