A splicing structure and method of large-size variable-height right-angle paper honeycomb parts

Abstract

The application discloses a large-size variable-height right-angle paper honeycomb part splicing structure and a splicing method, which are arranged on a workbench and comprise a honeycomb interlayer, the honeycomb interlayer comprises first honeycomb connecting blocks and second honeycomb connecting blocks, and the first honeycomb connecting blocks and the second honeycomb connecting blocks are arranged on the workbench; a splicing joint is arranged between the first honeycomb connecting blocks and the second honeycomb connecting blocks, foaming glue is arranged at the splicing joint, a first isolation layer and a bottom peelable cloth are sequentially arranged on the workbench from bottom to top, the top of each of the first honeycomb connecting blocks and the second honeycomb connecting blocks is provided with a second isolation layer, and a first pressing plate is arranged on the second isolation layer; the application has the beneficial effects that the first honeycomb connecting blocks and the second honeycomb connecting blocks can be kept stable during solidification by pressing the first pressing plate, and the splicing joint is prevented from being enlarged due to foaming glue expansion, so that the quality and the qualified rate of the honeycomb interlayer after splicing are affected.

Description

Technical Field

[0001] This invention relates to a splicing structure and splicing method for large-size variable-height right-angled paper honeycomb parts. Background Technology

[0002] Honeycomb sandwich composite parts consist of two high-strength upper and lower composite panels sandwiching a honeycomb core. They are widely used due to their advantages such as light weight, high flexural strength and stiffness, strong resistance to instability, fatigue aging resistance, and good sound absorption, sound insulation, and heat insulation properties. Particularly in the aerospace field, honeycomb sandwich composite materials are extensively used in aircraft structures such as wings, fuselages, tail fins, radomes, floors, and interior trim. The superior performance of honeycomb sandwich structures has made them an indispensable structural material in this field.

[0003] When the required size of the core material in a composite sandwich structure is larger than the size of the raw material, expanding foam is often used for splicing to ensure filling and weight reduction. However, expanding foam has a large coefficient of thermal expansion during curing, which can easily lead to problems such as honeycomb slippage, seam depression, air bubbles in the seams, seam step differences, and seam dimensional deviations, affecting the appearance quality of the honeycomb core parts. In view of this, this invention proposes a splicing structure and splicing method for large-size variable-height right-angled paper honeycomb parts to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a splicing structure for large-size variable-height right-angled paper honeycomb parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A splicing structure for a large-size variable-height right-angled paper honeycomb part is set on a workbench and includes a honeycomb interlayer. The honeycomb interlayer includes a first honeycomb connecting block and a second honeycomb connecting block, both of which are set on the workbench.

[0007] A splicing seam is provided between the first honeycomb connecting block and the second honeycomb connecting block, and foam adhesive is provided at the splicing seam. A first isolation layer and a bottom peelable fabric are arranged sequentially from bottom to top on the worktable. The first honeycomb connecting block and the second honeycomb connecting block are arranged on the bottom peelable fabric. A second isolation layer is provided on the top of the first honeycomb connecting block and the second honeycomb connecting block. A first pressure plate is provided on the second isolation layer.

[0008] As an improvement to the above technical solution, a peelable splicing fabric is provided at the splicing seam to wrap the splicing seam.

[0009] A pad is provided on the spliced ​​peelable fabric, a third isolation layer is provided on the pad, and a second pressure plate is provided on the third isolation layer.

[0010] As an improvement to the above technical solution, both the first honeycomb connecting block and the second honeycomb connecting block are aramid paper honeycomb.

[0011] As an improvement to the above technical solution, the first isolation layer, the second isolation layer, and the third isolation layer are all isolation membranes.

[0012] As an improvement to the above technical solution, the first pressure plate and the second pressure plate are made of one or more combinations of metal materials and composite materials.

[0013] As an improvement to the above technical solution, the gasket is made of one or more combinations of metal materials and composite materials, and the thickness of the gasket is less than 1.5 mm.

[0014] As an improvement to the above technical solution, the height of the first cellular connector is higher than the height of the second cellular connector;

[0015] The second pressure plate is attached to the vertical right-angle side of the first honeycomb connecting block.

[0016] A method for splicing large-size variable-height right-angled paper honeycomb parts includes the following steps:

[0017] S1. Cutting:

[0018] The honeycomb interlayer is cut according to the actual use, so that the honeycomb interlayer forms the first honeycomb connecting block and the second honeycomb connecting block;

[0019] S2, One-time laying:

[0020] The first isolation layer and the bottom peelable fabric are laid on the workbench from bottom to top. The first honeycomb connecting block and the second honeycomb connecting block are laid on the bottom peelable fabric, and expanding foam is applied at the joint of the first honeycomb connecting block and the second honeycomb connecting block.

[0021] S3, Secondary Laying:

[0022] After S2 is completed, a second isolation layer is laid on both sides of the splice seam, and a first pressure plate is laid on the second isolation layer;

[0023] S4, Three-stage laying:

[0024] After S3 is completed, the spliced ​​peelable fabric, the third isolation layer, the gasket and the second pressure plate are laid from bottom to top at the splice seam;

[0025] S5, Curing:

[0026] The assembled structure is sealed in a sealed bag and then cured.

[0027] As an improvement to the above technical solution, in S2, when applying expanding foam at the splicing seam, a hot air gun is used to heat and soften the splicing seam, and the expanding foam is manually squeezed into the core cells of the first honeycomb connecting block and the second honeycomb connecting block before splicing.

[0028] As an improvement to the above technical solution, when the hot air gun is used to heat and soften the foam, the distance between the hot air gun outlet and the foam should be no less than 150mm, the maximum air temperature at a distance of 75mm from the outlet should not exceed 93℃, and the hot air gun outlet should be moved continuously.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] During the molding process, the honeycomb interlayer is cut to form the first honeycomb connecting block and the second honeycomb connecting block. Then, the first isolation layer and the bottom peelable fabric are set on the workbench from bottom to top. The first honeycomb connecting block and the second honeycomb connecting block are placed on the bottom peelable fabric, and foam is applied at the seam. Then, the second isolation layer and the first pressure plate are laid on the first honeycomb connecting block and the second honeycomb connecting block from bottom to top. Finally, a curing process is carried out.

[0031] By applying pressure to the first pressure plate, the first and second honeycomb connecting blocks can remain stable during the curing process, preventing the expansion of the foam from causing the splicing seam to widen and affecting the quality and pass rate of the honeycomb interlayer after splicing. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] Figure 2 This is a cross-sectional schematic diagram of the splicing structure of the present invention.

[0034] In the diagram: 1. Workbench; 2. Honeycomb interlayer; 21. First honeycomb connecting block; 22. Second honeycomb connecting block; 3. Splicing seam; 4. First isolation layer; 5. Second isolation layer; 6. Third isolation layer; 7. First pressure plate; 8. Spliced ​​peelable fabric; 9. Gasket; 10. Second pressure plate; 11. Bottom peelable fabric. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example:

[0037] like Figure 1-2 As shown, this embodiment proposes a splicing structure for large-size variable-height right-angled paper honeycomb parts, which is set on a workbench 1 and includes a honeycomb interlayer 2. The honeycomb interlayer 2 includes a first honeycomb connecting block 21 and a second honeycomb connecting block 22, both of which are set on the workbench 1.

[0038] A splicing seam 3 is provided between the first honeycomb connecting block 21 and the second honeycomb connecting block 22, and foam adhesive is provided at the splicing seam 3. A first isolation layer 4 and a bottom peelable fabric 11 are arranged sequentially from bottom to top on the workbench 1. The first honeycomb connecting block 21 and the second honeycomb connecting block 22 are arranged on the bottom peelable fabric 11. A second isolation layer 5 is provided on the top of the first honeycomb connecting block 21 and the second honeycomb connecting block 22. A first pressure plate 7 is provided on the second isolation layer 5.

[0039] In this embodiment, during the molding process, the honeycomb interlayer 2 is cut to form a first honeycomb connecting block 21 and a second honeycomb connecting block 22. Then, a first isolation layer 4 and a bottom peelable fabric 11 are sequentially arranged from bottom to top on the workbench 1. The first honeycomb connecting block 21 and the second honeycomb connecting block 22 are placed on the bottom peelable fabric 11, and foaming adhesive is applied at the splice seam 3. Then, a second isolation layer 5 and a first pressure plate 7 are sequentially laid from bottom to top on the first honeycomb connecting block 21 and the second honeycomb connecting block 22. Finally, a curing process is performed.

[0040] By applying pressure to the first pressure plate 7, the first honeycomb connecting block 21 and the second honeycomb connecting block 22 can remain stable during the curing process, thus preventing the expansion of the foam adhesive from causing the splicing seam 3 to become larger and affecting the quality and pass rate of the honeycomb interlayer 2 after splicing.

[0041] Specifically, a peelable fabric 8 is provided at the seam 3 to wrap the seam 3;

[0042] A pad 9 is provided on the spliced ​​peelable fabric 8, a third isolation layer 6 is provided on the pad 9, and a second pressure plate 10 is provided on the third isolation layer 6.

[0043] In this embodiment, when the first pressure plate 7 is pressed, the second pressure plate 10 is also pressed at the same time to prevent the splicing seam 3 of the first honeycomb connecting block 21 and the second honeycomb connecting block 22 from becoming larger.

[0044] Of course, the gasket 9 is placed at the splice seam 3 to evenly transmit pressure and prevent excessive pressure in one place from causing collapse.

[0045] Specifically, both the first honeycomb connecting block 21 and the second honeycomb connecting block 22 are aramid paper honeycomb.

[0046] The first isolation layer 4, the second isolation layer 5, and the third isolation layer 6 are all isolation membranes.

[0047] Specifically, the first pressure plate 7 and the second pressure plate 10 are made of one or more of the following materials: metal and composite materials.

[0048] Specifically, the gasket 9 is made of one or more of metal materials and composite materials, and the thickness of the gasket 9 is less than 1.5 mm.

[0049] Specifically, the height of the first cellular connector 21 is higher than the height of the second cellular connector 22;

[0050] The second pressure plate 10 is attached to the vertical right-angle side of the first honeycomb connecting block 21.

[0051] A method for splicing large-size variable-height right-angled paper honeycomb parts includes the following steps:

[0052] S1. Cutting:

[0053] Cut the honeycomb interlayer 2 according to the actual use, so that the honeycomb interlayer 2 forms the first honeycomb connecting block 21 and the second honeycomb connecting block 22.

[0054] S2, One-time laying:

[0055] On the workbench 1, the first isolation layer 4 and the bottom peelable fabric 11 are laid from bottom to top, and the first honeycomb connecting block 21 and the second honeycomb connecting block 22 are laid on the bottom peelable fabric 11. Foam is applied at the splice seam 3 of the first honeycomb connecting block 21 and the second honeycomb connecting block 22.

[0056] S3, Secondary Laying:

[0057] After S2 is completed, a second isolation layer 5 is laid on both sides of the splice seam 3, and a first pressure plate 7 is laid on the second isolation layer 5;

[0058] S4, Three-stage laying:

[0059] After S3 is completed, the spliced ​​peelable fabric 8, the third isolation layer 6, the gasket 9 and the second pressure plate 10 are laid from bottom to top at the splice seam 3.

[0060] S5, Curing:

[0061] The assembled structure completed by S4 is sealed in a sealed bag and then cured.

[0062] In this embodiment, the number of the first pressure plate 7 and the second pressure plate 10 is unlimited and can be determined according to the size of the first honeycomb connecting block 21 and the second honeycomb connecting block 22;

[0063] Of course, the pressure applied by the first pressure plate 7 and the second pressure plate 10 shall not exceed 45N;

[0064] By using the above splicing method, the width of the splicing seam 3 caused by the thermal expansion of the foam can be reduced, which can prevent misalignment of the first honeycomb connecting block 21 and the second honeycomb connecting block 22 during the curing and splicing process, thereby effectively improving the quality and pass rate of the spliced ​​product.

[0065] Of course, sealing and curing in a sealed bag allows the curing process to be completed under controlled pressure and temperature, ensuring the adhesive is fully cured and improving the strength and durability of the spliced ​​structure. Moreover, sealing and curing in a sealed bag can isolate external dust, moisture and other contaminants, ensuring the cleanliness of the splicing process and avoiding the impact of the external environment on the splicing quality.

[0066] In this case, the entire unit was placed in a heating device for curing during the fixing process. This heating device includes, but is not limited to, heating tubes and heating boxes.

[0067] Specifically, in S2, when applying expanding foam at the splicing seam 3, a hot air gun is used to heat and soften the splicing seam 3, and the expanding foam is manually squeezed into the core cells of the first honeycomb connecting block 21 and the second honeycomb connecting block 22 before splicing.

[0068] Specifically, when using a hot air gun to heat and soften the foam, the distance between the hot air gun outlet and the foam should be no less than 150mm, the maximum air temperature at a distance of 75mm from the outlet should not exceed 93℃, and the hot air gun outlet should be continuously moved.

[0069] In this embodiment, when applying the expanding foam, a hot air gun is used to heat and soften the joint, and the expanding foam is manually squeezed into the core before splicing. This effectively controls the thermal expansion of the expanding foam and ensures the stability of the joint width.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A splice structure for large size variable height right angle paper honeycomb parts, characterized by: Be provided on the workbench (1), including honeycomb sandwich (2), the honeycomb sandwich (2) including first honeycomb connecting block (21), second honeycomb connecting block (22), the first honeycomb connecting block (21), second honeycomb connecting block (22) are provided on the workbench (1); The first honeycomb connecting block (21), second honeycomb connecting block (22) between the splicing seam (3) is provided with foaming glue, the workbench (1) is sequentially provided with first isolation layer (4), bottom peelable cloth (11) from bottom to top, the first honeycomb connecting block (21), second honeycomb connecting block (22) are provided on the bottom peelable cloth (11), the top of the first honeycomb connecting block (21), second honeycomb connecting block (22) is provided with second isolation layer (5), and the second isolation layer (5) is provided with first pressing plate (7); The splicing seam (3) is provided with splicing peelable cloth (8), and the splicing peelable cloth (8) is wrapped around the splicing seam (3); The splicing peelable cloth (8) is provided with a gasket (9), and the gasket (9) is provided with a third isolation layer (6), and the third isolation layer (6) is provided with a second pressing plate (10); The first honeycomb connecting block (21) is higher than the height of the second honeycomb connecting block (22); The second pressing plate (10) is attached to the vertical right angle edge of the first honeycomb connecting block (21).

2. The structure of claim 1, wherein: The first honeycomb connecting block (21), second honeycomb connecting block (22) are all aramid paper honeycomb.

3. The structure of claim 1, wherein: The first isolation layer (4), second isolation layer (5) and third isolation layer (6) are all isolation films.

4. The structure of claim 1, wherein: The first pressing plate (7) and the second pressing plate (10) are made of one or more combinations of metal materials and composite materials.

5. The structure of claim 1, wherein: The gasket (9) is made of one or more combinations of metal materials and composite materials, and the thickness of the gasket (9) is less than 1.5 mm.

6. A method of splicing a splice structure of large-size variable-height right-angle paper honeycomb parts according to any one of claims 1 to 5, characterized by: The following steps are included: S1, cutting: According to the actual use, the honeycomb sandwich (2) is cut, so that the honeycomb sandwich (2) forms the first honeycomb connecting block (21) and the second honeycomb connecting block (22); S2, first laying: The first isolation layer (4) and the bottom peelable cloth (11) are sequentially laid on the workbench (1) from bottom to top, and the first honeycomb connecting block (21) and the second honeycomb connecting block (22) are laid on the bottom peelable cloth (11), and the foaming glue is laid on the splicing seam (3) of the first honeycomb connecting block (21) and the second honeycomb connecting block (22); S3, second laying: After S2 is completed, the second isolation layer (5) is laid on both sides of the splicing seam (3), and the first pressing plate (7) is laid on the second isolation layer (5); S4, third laying: After S3 is completed, the splicing peelable cloth (8), the third isolation layer (6), the gasket (9) and the second pressing plate (10) are sequentially laid on the splicing seam (3) from bottom to top; S5, curing: The splicing structure completed in S4 is sealed with a sealing bag and cured.

7. The method of claim 6, wherein the method further comprises: In S2, when laying the foaming glue at the splicing joint (3), a hot air gun is used to heat and soften the splicing joint (3), and the foaming glue is manually extruded into the core of the first honeycomb connecting block (21) and the second honeycomb connecting block (22), and then splicing is performed. ​ 8. The method of claim 6, wherein the method further comprises: providing a plurality of large-size variable-height right-angle paper honeycomb parts; and connecting the plurality of large-size variable-height right-angle paper honeycomb parts to form a large-size variable-height right-angle paper honeycomb part assembly. When the hot air gun is used to heat and soften, the distance between the air outlet of the hot air gun and the foaming glue is not less than 150 mm, the maximum air temperature at a distance of 75 mm from the air outlet is not more than 93℃, and the air outlet of the hot air gun is constantly moved.

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