A U-shaped closed-angle long string reinforced wallboard co-curing forming die and forming method

Abstract

The application discloses a U-shaped closed-angle stringer reinforced wallboard co-curing forming die and a forming method. The forming die comprises a die main body and a rigid U-shaped closed-angle stringer forming slider. The rigid U-shaped closed-angle stringer forming slider is divided into a U-shaped closed-angle stringer forming slider main body and an insert block. A "G"-shaped missing corner is arranged on one side of the U-shaped closed-angle stringer forming slider main body along the length direction. The insert block is approximately trapezoidal in cross section and is fitted with the "G"-shaped missing corner to form the profile of the U-shaped closed-angle stringer. The insert block comprises a first die closing surface and a second die closing surface. The first die closing surface is an inclined surface. The second die closing surface is connected and installed with the U-shaped closed-angle stringer forming slider main body, and the second die closing surface is higher than the height of the web of the U-shaped closed-angle stringer. By dividing the rigid U-shaped closed-angle stringer forming slider into blocks and combining the demolding method, the technical difficulty of difficult demolding caused by the closed-angle structure of the U-shaped closed-angle stringer is solved. In addition, the deformation risk of the slender strip slider manufacturing is reduced, and the mold manufacturing difficulty and manufacturing cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aeronautical composite structure design and manufacturing, in particular to a U-shaped closed-angle stringer stiffened panel co-curing forming die and forming method. BACKGROUND

[0002] Advanced composite materials are widely used in aerospace due to their advantages such as light weight, high strength, fatigue resistance and corrosion resistance. Stringer stiffened panel is a common structure form in aerospace structures, and composite materials are gradually used to achieve the purpose of lightweight. In the prior art, the stringer stiffened panel usually has a T-shaped stringer stiffened panel structure and a U-shaped stringer stiffened panel structure. The U-shaped stringer stiffened panel structure has a larger bonding area with the skin structure than the T-shaped stringer stiffened panel structure, which can significantly improve the bonding quality and effectively avoid the problem that the stringer debonding affects the entire panel structure.

[0003] At present, the U-shaped stringer stiffened panel structure usually adopts a U-shaped stringer and panel skin co-curing forming process. First, the panel skin patch laying is completed on the panel skin die, and the U-shaped stringer patch laying is completed on the U-shaped stringer forming slide. Second, the U-shaped stringer forming slide needs to be flipped using a flipping tool, and then the U-shaped stringer slide is positioned and combined to the panel skin die. Finally, the whole bag is made for co-curing. However, for the U-shaped stringer stiffened panel with hyperbolic characteristics (i.e. in the coordinate system, the U-shaped stringer stiffened panel is curved in the X direction and the Y direction), and in order to ensure the structural strength, the web of the U-shaped stringer is generally arranged in the normal direction of the panel. Therefore, the closed angle is easily formed between the two webs of the U-shaped stringer. When the co-curing forming process is used for the U-shaped closed-angle stringer stiffened panel with hyperbolic characteristics, the following technical problems exist: (1) the forming slide of the U-shaped closed-angle stringer has the problem of difficult demolding; (2) when the U-shaped stringer forming slide is flipped after the patch laying, the flipping process is relatively complex, and the fiber of the patch (prepreg) is prone to slip and twist. SUMMARY

[0004] The present application aims to provide a U-shaped closed-angle stringer stiffened panel co-curing forming die and forming method, which can solve the problem of difficult demolding of the U-shaped closed-angle stringer forming slide in the co-curing forming process of the U-shaped closed-angle stringer stiffened panel. In addition, the flipping structure of the U-shaped closed-angle stringer forming slide is simplified, the difficulty and cost of die manufacturing are reduced, and the forming process is simplified.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A U-shaped closed-angle stringer stiffened panel co-curing forming die, comprising:

[0007] The mold body is provided with a profile for forming a hyperbolic skin wall plate.

[0008] The mold body is provided with a profile for forming a hyperbolic skin wall plate.

[0009] The rigid U-shaped closed-angle stringer forming slide block comprises a U-shaped closed-angle stringer forming slide block body and an insert block; one "Г"-shaped missing corner is arranged on one side of the profile of the U-shaped closed-angle stringer forming slide block body along the length direction; the insert block is approximately trapezoidal in cross section and fits the "Г"-shaped missing corner of the U-shaped closed-angle stringer forming slide block body to form the profile of the U-shaped closed-angle stringer; the insert block comprises a first mold closing surface and a second mold closing surface; the first mold closing surface is an inclined surface; the second mold closing surface is connected and installed with the U-shaped closed-angle stringer forming slide block body; and the second mold closing surface of the insert block is higher than the web height of the U-shaped closed-angle stringer.

[0010] In another embodiment, a long circular through hole is arranged on the U-shaped closed-angle stringer forming slide block body, the length direction of the long circular through hole is the same as the width direction of the U-shaped closed-angle stringer forming slide block body, a bolt hole is arranged on the second mold closing surface of the insert block and cooperates with the long circular through hole on the U-shaped closed-angle stringer forming slide block body to lock the U-shaped closed-angle stringer forming slide block body and the insert block through a bolt.

[0011] In another embodiment, a plurality of positioning grooves are arranged on the second mold closing surface of the insert block, and a plurality of positioning bosses are arranged on the surface of the U-shaped closed-angle stringer forming slide block body which cooperates with the second mold closing surface of the insert block to cooperate with the positioning grooves.

[0012] In another embodiment, the insert block is divided into a plurality of segments along the length direction.

[0013] In another embodiment, U-shaped closed-angle stringer forming slide block positioning blocks are arranged on both ends of the mold body; positioning tiger mouths are arranged on both sides of the end position of the rigid U-shaped closed-angle stringer forming slide block to cooperate with two adjacent U-shaped closed-angle stringer forming slide block positioning blocks for positioning.

[0014] In another embodiment, universal rotation lifting rings are further arranged on both ends of the U-shaped closed-angle stringer forming slide block body.

[0015] In another embodiment, the U-shaped closed-angle stringer reinforced wall plate co-curing forming mold further comprises a flexible U-shaped closed-angle stringer forming slide block.

[0016] In another embodiment, the rigid U-shaped closed-angle stringer forming slide block and the flexible U-shaped closed-angle stringer forming slide block are arranged at intervals on the mold body.

[0017] In a second aspect, a co-curing forming method of a U-shaped closed-angle stringer stiffened wallboard is provided, which uses the co-curing forming mold described above, and the forming method comprises demolding, specifically comprising: first, removing the connection between the auxiliary material and the rigid U-shaped closed-angle stringer forming slider and the mold body, then loosening the connection between the U-shaped closed-angle stringer forming slider body and the insert block, then moving the U-shaped closed-angle stringer forming slider body in a normal direction to separate the U-shaped closed-angle stringer forming slider body from the mold closing surface of the insert block, then moving the insert block horizontally along the width direction to the U-shaped closed-angle stringer forming slider body, so that the first mold closing surface is close to the U-shaped closed-angle stringer forming slider body, thereby making the overall width of the U-shaped closed-angle stringer forming slider smaller than the minimum opening width of the U-shaped closed-angle stringer, and finally smoothly taking out.

[0018] In the present application, the loosening of the connection between the U-shaped closed-angle stringer forming slider body and the insert block can mean that the connection between the U-shaped closed-angle stringer slider body and the insert block is completely released, and under the condition of not being limited by other structures, it can be completely separated; or it can mean that the connection between the U-shaped closed-angle stringer slider body and the insert block still exists, and under the condition of not being limited by other structures, it cannot be completely separated, but it can move between each other. When the connection between the U-shaped closed-angle stringer slider body and the insert block is completely released, the U-shaped closed-angle stringer slider body and the insert block can be taken out in sequence; when the connection between the U-shaped closed-angle stringer slider body and the insert block still exists, the U-shaped closed-angle stringer forming slider body and the insert block can be taken out in a normal direction as a whole at one time.

[0019] In another embodiment, the co-curing forming method of the U-shaped closed-angle stringer stiffened wallboard comprises the following steps:

[0020] S1, mold preparation;

[0021] S2, laying up of the material sheet; the material sheet is laid up on the mold body and the rigid U-shaped closed-angle stringer forming slider surface according to the design of the lay-up;

[0022] S3, the rigid U-shaped closed-angle stringer forming slider with the laid-up material sheet is turned over and installed and fixed on the mold body through the positioning structure at the U-shaped closed-angle stringer forming position;

[0023] S4, at the U-shaped closed-angle stringer position where the rigid U-shaped closed-angle stringer forming slider is not placed, the material sheet is laid up along the U-shaped closed-angle stringer surface, and the un-vulcanized silicone rubber is laid to fill or the flexible U-shaped closed-angle stringer forming slider is inserted, and the filling height of the silicone rubber is higher than the height of the stringer web;

[0024] S5, bagging and vacuumizing;

[0025] S6, heating and curing;

[0026] S7, demolding.

[0027] The beneficial effects of the present application: by dividing the U-shaped closed angle long string forming slider into a slider body and an insert block, combined with the demolding method of the present application, the technical difficulties of the U-shaped closed angle long string structure are solved; at the same time, the insert block is divided into multiple sections, which reduces the manufacturing deformation risk of the slender strip, reduces the mold manufacturing difficulty and manufacturing cost; by setting universal rotating lifting rings at both ends of the rigid U-shaped closed angle long string forming slider, it is convenient to lift and overturn, reduces the investment of overturning tooling, reduces the mold tooling investment cost, and the fiber slip distortion caused by the overturning tooling; the U-shaped closed angle long string forming slider can adopt the incomplete disengagement demolding and molding mode, which reduces the manpower and time required for demolding and molding, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 1 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0029] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 2 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0030] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 3 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0031] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 4 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0032] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 5 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0033] Figure 6 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0034] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 7 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0035] Figure 8 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0036] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 9 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0037] Figure 10 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0038] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 11 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0039] Figure 12 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;

[0040] FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure; Figure 13 FIG. 1 is a schematic diagram of a U-shaped closed angle long string reinforced wallboard structure;​​​​

[0041] Figure 1 is a schematic diagram of a D-D section of a rigid U-shaped closed-angle stringer forming slide block; Figure 14 Figure 2 is a schematic diagram of a D-D section of a flexible U-shaped closed-angle stringer forming slide block;

[0042] Figure 3 is a schematic diagram of the cooperation of the rigid U-shaped closed-angle stringer forming slide block and the flexible U-shaped closed-angle stringer forming slide block; Figure 15 Figure 4 is a schematic diagram of the demolding principle of the rigid U-shaped closed-angle stringer forming slide block;

[0043] Figure 16 Figure 5 is a schematic diagram of the demolding principle of the flexible U-shaped closed-angle stringer forming slide block;

[0044] Wherein: 1-skin wall plate; 2-U-shaped closed-angle stringer; 3-mold main body; 31-mold surface of double-curved skin wall plate; 32-U-shaped closed-angle stringer forming slide block positioning block; 4-rigid U-shaped closed-angle stringer forming slide block; 41-U-shaped closed-angle stringer forming slide block main body; 411-positioning boss; 412-long circular through hole; 413-universal rotating lifting ring; 414-thimble hole; 42-insert block; 421-first mold closing surface; 422-second mold closing surface; 423-positioning groove; 424-bolt hole; 5-flexible U-shaped closed-angle stringer forming slide block; 6-fastening bolt. DETAILED DESCRIPTION

[0045] In order to make the technical problems to be solved by the present application, the technical solutions and the beneficial effects clearer and more apparent, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0046] In the description of the present application, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly specified and limited.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium.

[0048] As Figure 1 and Figure 2 ​As shown, a structural schematic diagram of a U-shaped closed-angle stringer reinforced wall panel with hyperbolic characteristics is shown, which includes a skin wall panel 1 and a plurality of U-shaped closed-angle stringers 2 arranged side by side on the skin wall panel, and an L-shaped stringer arranged side by side with the U-shaped closed-angle stringer at the edge side of the skin, the skin wall panel is curved in the X direction and the Y direction in the coordinate system, the bottom plate of the U-shaped closed-angle stringer 2 connects the skin wall panel, and the webs of the U-shaped closed-angle stringer 2 and the L-shaped stringer are arranged normal to the skin wall panel 1, so that the adjacent two webs of the U-shaped closed-angle stringer 2 are easily formed into a closed angle, that is, the opening (distance) between the adjacent webs narrows from one side of the skin wall panel to the side away from the skin wall panel. When this type of structure is formed by a pre-impregnated material co-curing process, the U-shaped closed-angle stringer forming slider will have difficulty in demolding. In addition, due to the structural design limitation of the U-shaped closed-angle stringer forming slider, it is necessary to use a turnover tool to turn over after the pre-impregnated material sheet is laid, and the mold body is closed. During this process, the pre-impregnated material sheet will slip and twist, which will affect the appearance quality of the wall panel after the product is formed, and the mold tool manufacturing cost of the product is high.

[0049] Embodiment 1

[0050] For the above structure, taking a U-shaped closed-angle stringer reinforced wall panel with a forming outer dimension of about 4035mm, a width of about 2500mm, and a minimum distance between the two webs of the U-shaped closed-angle stringer 2 of 190mm as an example, a U-shaped closed-angle stringer reinforced wall panel co-curing forming mold and forming method are provided.

[0051] A U-shaped closed-angle stringer reinforced wall panel co-curing forming mold, as shown in Figures 3 to 14 , comprising: a mold body 3, a rigid U-shaped closed-angle stringer forming slider 4; the mold body 3 is provided with a forming surface 31 of a hyperbolic skin wall panel; the rigid U-shaped closed-angle stringer forming slider 4 includes a U-shaped closed-angle stringer forming slider body 41 and an insert block 42; the forming surface of the U-shaped closed-angle stringer forming slider body 41 is provided with a "Г" type missing corner along the length direction; the insert block 42 is approximately trapezoidal in cross section and fits with the "Г" type missing corner of the U-shaped closed-angle stringer forming slider body 41 to form the surface of the U-shaped closed-angle stringer 2 as a whole; the insert block 42 includes a first mold closing surface 421 and a second mold closing surface 422, the first mold closing surface 421 is an inclined surface, the second mold closing surface 422 is connected and installed with the U-shaped closed-angle stringer forming slider body 41, and the second mold closing surface 422 is higher than the height of the web of the U-shaped closed-angle stringer 2.

[0052] The U-shaped closed angle long string forming slider body 41 is provided with a long circular through hole 412, the length direction of the long circular through hole 412 is the width direction of the U-shaped closed angle long string forming slider body 41; the second mold closing surface 422 of the insert block 42 is provided with a bolt hole 424, which cooperates with the long circular through hole 412 on the U-shaped closed angle long string forming slider body 41, and the U-shaped closed angle long string forming slider body 41 and the insert block 42 are locked by the fastening bolt 6.

[0053] The second mold closing surface 422 of the insert block 42 is provided with a positioning groove 423, and the surface of the U-shaped closed angle long string forming slider body 41 that cooperates with the second mold closing surface 422 of the insert block 42 is provided with a positioning boss 411, which cooperates with the positioning groove 423.

[0054] The insert block 42 can be segmented as a whole, or segmented along the length direction. As shown in Figure 11 and 12 The insert block 42 is segmented into three segments, each of which is provided with a bolt hole 424 and a positioning groove 423. Segmenting the insert block 42 in length can prevent the deformation of the slender strip-shaped insert block during processing, thereby ensuring the processing precision of the profile.

[0055] As shown in Figure 5 and Figure 7 The mold body 3 is provided with U-shaped closed angle long string forming slider positioning blocks 32 at both ends, which are separately formed and then installed on the mold body 3 by fastening bolts or pins for the convenience of mold manufacturing and cost consideration; the two sides of the end position of the rigid U-shaped closed angle long string forming slider 4 are provided with positioning tiger mouths, which cooperate with two adjacent U-shaped closed angle long string forming slider positioning blocks 32 for positioning.

[0056] As shown in Figure 9 The two ends of the rigid U-shaped closed angle long string forming slider 4 are also provided with universal rotating lifting rings 413. The universal rotating lifting rings 413 can facilitate the lifting and turning of the rigid U-shaped closed angle long string forming slider 4, and reduce the investment in turning fixtures.

[0057] As shown in Figure 10 The rigid U-shaped closed angle long string forming slider 4 is also provided with a ejector pin hole 414, which can be a bolt hole, and then cooperates with a bolt to tighten or loosen for ejection or resetting.

[0058] Example 2

[0059] For the forming of the U-shaped closed angle long string ribbed wallboard, on the one hand, the U-shaped closed angle long string 2 needs to be maintained during the curing process, on the other hand, the position accuracy of the U-shaped long string is ensured, and in order to ensure that the internal damage of the U-shaped long string ribbed wallboard is not required, it is ensured that the ribbed wallboard can receive the maximum forming pressure everywhere, therefore, the rigid U-shaped closed angle long string forming slider is arranged at intervals, then the expansion amount of the unvulcanized silicone rubber or the flexible U-shaped closed angle long string forming slider is large, and the characteristics that the soft silicone rubber mold can well fit the inner cavity of the U-shaped long string, and the silicone rubber mold is soft and can be easily taken out from the inside of the U-shaped closed angle long string, and the unvulcanized silicone rubber or the flexible U-shaped closed angle long string forming slider is filled between the two parts of the metal long string slider, so as to ensure the position accuracy and forming quality of the U-shaped closed angle long string.

[0060] Therefore, as Figure 15 shown, the U-shaped closed angle long string ribbed wallboard co-curing forming mold further comprises a flexible U-shaped closed angle long string forming slider 5. The rigid U-shaped closed angle long string forming slider 4 and the flexible U-shaped closed angle long string forming slider 5 are arranged at intervals on the mold body.

[0061] Embodiment 3

[0062] Based on the above-mentioned U-shaped closed angle long string ribbed wallboard co-curing forming mold, a U-shaped closed angle long string ribbed wallboard co-curing forming method is also provided, comprising the steps of:

[0063] S1, mold preparation; including assembly of the rigid U-shaped closed angle long string forming slider 4, and turning over the combined rigid U-shaped closed angle long string forming slider 4 through the two end universal rotation lifting rings 413 to make the type surface upward, and then placing it on the lamination workbench;

[0064] S2, sheet lamination; according to the design of the laminated layer, respectively laminating the sheets on the type surface of the mold body 3 and the rigid U-shaped closed angle long string forming slider 4; once hot pressing pre-vacuumizing is performed every three layers to ensure that the internal gas of the laminated layer is completely discharged;

[0065] S3, turning over the rigid U-shaped closed angle long string forming slider 4 laminated with the sheets through the two end universal rotation lifting rings 413, and the type surface faces the type surface of the mold body 3, and then positioning through the cooperation of the positioning tiger mouth and the U-shaped closed angle long string forming slider positioning block 32 to fix the rigid U-shaped closed angle long string forming slider 4 on the mold body 3 at intervals;

[0066] S4, laminating the sheets along the U-shaped closed angle long string type surface at the position of the U-shaped closed angle long string where the rigid U-shaped closed angle long string forming slider 4 is not placed, and then laying the isolation film and the soft unvulcanized silicone rubber for filling, and the filling height of the silicone rubber is higher than the web height of the U-shaped closed angle long string; when laminating the sheets, the step S2 is synchronized, and once hot pressing pre-vacuumizing is needed every three layers;

[0067] S5, bagging and vacuumizing; including laying isolation film, air-permeable felt and vacuum bag in turn, and then vacuumizing and packaging;

[0068] S6, heating and curing; putting the whole mold which has passed the packaging into a hot press tank for heating and curing;

[0069] S7, demolding; the specific removal steps include:

[0070] S71, removing the vacuum bag, air-permeable felt, flexible U-shaped closed angle long string forming slider 5, isolation film and the like in turn;

[0071] S72, releasing the connection between the U-shaped closed angle long string forming slider 4 and the mold body 3;

[0072] S73, demolding of the rigid U-shaped closed angle long string forming slider 4, which specifically includes: loosening the connection between the U-shaped closed angle long string forming slider body 41 and the insert block 42 by loosening the fastening bolt 6 by 7-9 mm; then moving the U-shaped closed angle long string forming slider body alone in the normal direction by about 10 mm and separating from the closing surface of the insert block by tightening the bolt arranged in the thimble hole; then moving the insert block 4 along the width direction horizontally to the U-shaped closed angle long string forming slider body, so that the first closing surface is close to the U-shaped closed angle long string forming slider body, so that the overall width of the rigid U-shaped closed angle long string forming slider is less than the minimum opening width of the U-shaped closed angle long string, so that the rigid U-shaped closed angle long string forming slider can be smoothly demolded along the wallboard normal direction. The principle of the demolding process can be referred to in Figure 16 .

[0073] In this embodiment, during the demolding process of the rigid U-shaped closed angle long string forming slider, the U-shaped closed angle long string forming slider and the insert block are demolded as a whole while keeping the connection. When the next mold is used, only the fastening bolt which has been loosened needs to be tightened again, the insert block is pulled back to the position before sliding through the tiger mouth positioning and the boss guiding and fixed, and then it can be directly used, which reduces the time cost and labor cost of rehandling and turning over after disassembling the blocks, improves the mold use efficiency and simplifies the complex work.

[0074] Embodiment 4

[0075] In step S4 of embodiment 3, the filled soft unvulcanized silicone rubber will form a silicone rubber strip after curing, which has the profile of the U-shaped closed angle long string and becomes the flexible U-shaped closed angle long string forming slider 5 directly for use in the next mold.

[0076] Therefore, the difference between this embodiment and embodiment 3 is that in step S4, the flexible U-shaped closed angle long string forming slider 5 formed by curing in embodiment 3 is directly laid on the U-shaped closed angle long string position where the rigid U-shaped closed angle long string forming slider 4 is not placed after laying the material sheet.

[0077] Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the spirit and scope of the application. The particular embodiments described herein are offered by way of example only, and are not meant to be limiting in any way. The true scope of the application is set forth in the appended claims, and the specification and examples are offered merely to exemplify the true scope of the application.

Claims

1. A U-shaped closed angle stringer reinforced wallboard co-curing forming die, comprising a die body, a rigid U-shaped closed angle stringer forming slider; characterized in that, Also include flexible U-shaped closed angle stringer forming slider; The rigid U-shaped closed angle stringer forming slider and the flexible U-shaped closed angle stringer forming slider are arranged at intervals on the mold body; The mold body is provided with the profile of the forming double-curved skin wallboard; The rigid U-shaped closed angle stringer forming slider includes a U-shaped closed angle stringer forming slider body and an insert block; One "G" type missing angle is arranged on the length direction of the profile of the U-shaped closed angle stringer forming slider body; The cross section of the insert block is approximately trapezoidal, which is fitted with the "G" type missing angle of the U-shaped closed angle stringer forming slider body, and the whole constitutes the profile of the U-shaped closed angle stringer; The insert block includes a first mold closing surface and a second mold closing surface; The first mold closing surface is an inclined surface; The second mold closing surface is connected and installed with the U-shaped closed angle stringer forming slider body; The second mold closing surface of the insert block is higher than the height of the web of the U-shaped closed angle stringer.

2. The U-closed angle long stringer stiffened panel co-curing forming tooling mold according to claim 1, wherein, A long circular hole is arranged in the thickness direction of the U-shaped closed angle stringer forming slider body, and the length direction of the long circular hole is the width direction of the U-shaped closed angle stringer slider body; A bolt hole is arranged on the second mold closing surface of the insert block, which cooperates with the long circular hole to lock the U-shaped closed angle stringer forming slider body and the insert block through a fastening bolt.

3. The U-closed angle long stringer stiffened panel co-curing forming tooling mold according to claim 1, wherein, A plurality of positioning grooves are arranged on the second mold closing surface of the insert block, and a plurality of positioning bosses are arranged on the surface of the U-shaped closed angle stringer forming slider body which cooperates with the second mold closing surface of the insert block, which cooperate with the positioning grooves.

4. The U-closed angle stringer stiffened panel co-curing forming tooling of claim 1, wherein, The insert block is divided into a plurality of segments along the length direction.

5. The U-closed angle stringer stiffened panel co-curing forming tooling of claim 1, wherein, U-shaped closed angle stringer forming slider positioning blocks are arranged at both ends of the mold body, and positioning tiger mouths are arranged on both sides of the end position of the rigid U-shaped closed angle stringer forming slider, which cooperate with the two adjacent U-shaped closed angle stringer forming slider positioning blocks to position.

6. The U-closed angle stringer stiffened panel co-curing forming tooling of claim 1, wherein, Universal rotation lifting rings are further arranged at both ends of the U-shaped closed angle stringer forming slider body.

7. A method of co-curing a U-closed angle stringer stiffened panel, based on the use of the co-curing mold according to any one of claims 1 to 6, characterized in that Demolding includes: first, remove the auxiliary material and release the connection between the rigid U-shaped closed angle stringer forming slider and the mold body, then loosen the connection between the U-shaped closed angle stringer forming slider body and the insert block, then separately move the U-shaped closed angle stringer forming slider body in the normal direction to separate from the mold closing surface of the insert block, then move the insert block horizontally along the width direction to the U-shaped closed angle stringer forming slider body, and the first mold closing surface is close to the U-shaped closed angle stringer forming slider body, so that the overall width of the rigid U-shaped closed angle stringer forming slider is less than the minimum opening width of the U-shaped closed angle stringer, and finally it is successfully taken out.

8. The method of claim 7, wherein the U-shaped closed angle long stringer wallboard co-curing forming method is characterized in that, The steps include: S1, mold preparation; S2, sheet laying; According to the design of the laying layer, lay the sheet on the profile of the mold body and the rigid U-shaped closed angle stringer forming slider; S3, turn over the rigid U-shaped closed angle stringer forming slider with laid sheet, so that the laying surface faces the mold body laying surface, and then install and fix the rigid U-shaped closed angle stringer forming slider on the mold body through the positioning structure according to the forming position of the U-shaped closed angle stringer; S4, lay the sheet at the position of the U-shaped closed angle stringer where the U-shaped closed angle stringer forming slider is not placed, along the profile of the U-shaped closed angle stringer; Then lay the unvulcanized silicone rubber to fill or insert the flexible U-shaped closed angle stringer forming slider; The filling height of the silicone rubber is higher than the web height of the U-shaped closed angle stringer; S5, bagging and vacuumizing; S6, heating and curing; S7, demolding.

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