Forming die for composite negative-angle U-shaped wall of airplane

Abstract

The utility model relates to a forming die for an airplane wall, in particular to a forming die for an airplane composite material negative-angle U-shaped wall. A forming die for an airplane composite negative-angle U-shaped wall comprises a bottom plate and a core die, the core die is movably connected with the bottom plate, lifting parts and a paving part are arranged in the length direction of the core die, the lifting parts are located at the two ends of the paving part, and edge scribed lines of U-shaped wall parts are engraved on the paving part. The core mold comprises a core mold I, a core mold II and a core mold III which are the same in length, the core mold I and the core mold III are arranged on the two sides of the core mold II respectively, and the lifting parts are installed above the ends of the core mold I and the core mold III; and after the U-shaped wall part is formed, the lifting part is lifted by hands, and meanwhile, the core mold I, the core mold III and the U-shaped wall part move in the height direction of the mold. The U-shaped wall part has the advantages that the problem that the bent edges on the two sides of the U-shaped wall part have negative angles and are difficult to demould is solved; materials and processing time are saved; the structure is simple and operation is convenient.

Description

Technical Field

[0001] This utility model relates to a molding die for an aircraft wall, and more particularly to a molding die for a negative angle U-shaped wall made of aircraft composite materials. Background Technology

[0002] Aircraft contain numerous walls that bear the aircraft's torque. The structural types of these walls, depending on their assembly location, can be categorized into several types: J-shaped, H-shaped, U-shaped, etc. Composite materials are widely used in the aerospace and automotive industries, and the amount and application of composite materials in aircraft have become important indicators of the structural advancement of aircraft. Composite material wall components are already widely used in aircraft. Some composite material U-shaped wall components have negative angles on both sides, and some of these negative angles are quite large (e.g., Figure 1 As shown in the figure, in actual production, it is not easy or very difficult to demold from the mold. Even if demolding is forced, it is easy to scratch the surface and internal quality of U-shaped wall parts, resulting in defects. This is a great hidden danger to the quality of aircraft. Utility Model Content

[0003] The purpose of this invention is to provide a molding die for a negative angle U-shaped wall of aircraft composite material. This die can form U-shaped wall parts of negative angle composite material, and the forming process is simple and easy to demold.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a molding die for a negative angle U-shaped wall of aircraft composite material, comprising a base plate and a core mold, the core mold being movably connected to the base plate, and a lifting part and a laying part being provided along the length direction of the core mold, the lifting part being located at both ends of the laying part, the laying part being engraved with edge lines of the U-shaped wall part, wherein the core mold comprises core mold I, core mold II and core mold III of the same length, core mold I and core mold III being respectively located on both sides of core mold II, and the lifting part being installed above the ends of core mold I and core mold III; after the U-shaped wall part is formed, the lifting part is lifted by hand, and core mold I, core mold III and U-shaped wall part are moved along the height direction of the mold.

[0005] Preferably, core mold II is embedded in the base plate; core mold I and core mold III are connected and positioned by guide pins and the base plate, respectively.

[0006] Preferably, the guide pin is fitted with a bushing.

[0007] Preferably, the core mold II and the base plate are fitted together at a 90° angle along the height of the mold.

[0008] Preferably, the portion of the core mold II located above the base plate is provided with a draft angle.

[0009] Preferably, the mating parts of core mold I, core mold III, and core mold II maintain a 3° fit along the mold height.

[0010] Preferably, the lifting part is a straight handle.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. Solved the problem of difficult demolding of U-shaped wall parts with negative angles on both sides of the bend, and produced qualified U-shaped wall parts;

[0013] 2. The core mold II and the base plate are manufactured separately, saving materials and processing time;

[0014] 3. Install bushings on the guide pins to prevent wear and tear from prolonged use;

[0015] 4. Simple structure and easy operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the U-shaped wall-like parts structure in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 3 This is a top view of an embodiment of the present utility model;

[0019] Figure 4 yes Figure 3 AA view;

[0020] Figure 1-4 In the middle, 1. base plate; 2. core mold I; 3. core mold II; 4. core mold III; 5. bushing; 6. guide pin; 7. straight handle. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 The present invention is further described in detail as follows: A molding die for a negative angle U-shaped wall of aircraft composite material includes a base plate 1 and a core mold. The core mold is movably connected to the base plate 1. A lifting part and a laying part are provided along the length direction of the core mold 1. The lifting part is located at both ends of the laying part. The laying part is engraved with edge lines of the U-shaped wall part. The core mold includes core mold I2, core mold II3 and core mold III4 of the same length. Core mold I2 and core mold III4 are respectively arranged on both sides of core mold II3. The lifting part is installed above the ends of core mold I2 and core mold III4. After the U-shaped wall part is formed, the lifting part is lifted by hand, and core mold I2, core mold III3 and U-shaped wall part are moved along the height direction of the mold.

[0022] In this embodiment, the specific structure is as follows:

[0023] like Figure 2As shown, the molding die mainly consists of three core molds and a base plate 1. Core mold II 3 is embedded in the base plate 1. Core molds I 2 and III 4 are each connected and positioned to the base plate via guide pins 6. To ensure that the guide pins 6 are not worn during long-term use, bushings 5 ​​are installed on the guide pins 6. The mating parts of core mold II 3 and the base plate maintain a 90° fit along the height of the die, facilitating die manufacturing and repair. Figure 4 As shown, the mating parts of core molds I2, III4, and II3 maintain a 3° fit along the mold height, facilitating the separation of core molds I2 and III4 from core mold II3. Straight handles 7 (lifting parts) are installed on core molds I2 and III4 to further aid in their separation from core mold II3. Edge lines for the U-shaped wall parts are etched on the core molds to facilitate part placement and molding.

[0024] The U-shaped wall parts are laid out on the molding die according to the edge markings. After laying, the molding die and the U-shaped wall are placed together in an autoclave for molding. After being removed from the autoclave and cooled, the operator holds the straight handle 7 and simultaneously moves the core molds I2, III4, and the U-shaped wall parts along the height of the die. Because core mold II3 has a 3° draft angle, it also facilitates the movement of the core molds and parts on both sides. After core molds I2, III4, and the U-shaped wall parts have moved along the height of the die, the space above the parts is freed up by core mold II3, making it easy to remove the parts.

[0025] The above embodiments are merely preferred embodiments of this utility model and do not constitute a limitation thereof. Any extensions, modifications, or equivalent substitutions made by those skilled in the art without departing from the principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A molding die for a negative angle U-shaped wall made of aircraft composite materials, characterized in that: The mold includes a base plate and a core mold, which are movably connected to the base plate. A lifting section and a laying section are provided along the length of the core mold. The lifting section is located at both ends of the laying section. The laying section is engraved with the edge lines of the U-shaped wall part. The core mold includes core mold I, core mold II and core mold III of the same length. Core mold I and core mold III are respectively located on both sides of core mold II. The lifting section is installed above the ends of core mold I and core mold III. After the U-shaped wall part is formed, the lifting section is lifted by hand, and core mold I, core mold III and U-shaped wall part are moved along the height direction of the mold.

2. The molding die for a negative angle U-shaped wall of aircraft composite materials according to claim 1, characterized in that: Core mold II is embedded in the base plate; core mold I and core mold III are connected and positioned by guide pins and the base plate, respectively.

3. The molding die for a negative angle U-shaped wall of aircraft composite materials according to claim 2, characterized in that: The guide pin is fitted with a bushing.

4. The molding die for a negative angle U-shaped wall of aircraft composite materials according to claim 1, characterized in that: The core mold II and the base plate are fitted together at a 90° angle along the height of the mold.

5. The molding die for a negative angle U-shaped wall of aircraft composite materials according to claim 1, characterized in that: The portion of core mold II located above the base plate has a draft angle.

6. The molding die for a negative angle U-shaped wall of aircraft composite materials according to claim 1, characterized in that: The mating parts of core mold I, core mold III, and core mold II maintain a 3° fit along the mold height.

7. The molding die for a negative angle U-shaped wall of aircraft composite materials according to claim 1, characterized in that: The lifting part has a straight handle.

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