Window opening type front edge forming mode

Abstract

The invention discloses a windowing type front edge forming mode in the technical field of composite materials. The windowing type front edge forming mode comprises the following steps: S1, positioning; determining the position of the design window on the leading edge component; s2, outer skin forming, wherein composite prepreg is laid on the mold and cured, and the outer skin is formed; a first bonding layer, a honeycomb core, a second bonding layer, the inner skin and an electromagnetic shielding layer are sequentially laid on the surface of the outer skin, a honeycomb window is formed in the position, corresponding to the design window, of the honeycomb core, and the inner skin covers the edge of the honeycomb window to form a local reinforcing structure; and S4, overall curing is conducted, specifically, the laid structure is cured, and the windowing type front edge is obtained through demolding after curing. The laser projector is used for comparing the position of the projection pattern with the position of the datum point on the mold and gradually performing fine adjustment, accurate positioning of the design window is achieved, traditional manual measurement marking is replaced, personal errors are reduced, and product consistency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, and more particularly to a windowed leading edge forming method. BACKGROUND

[0002] In the high-end manufacturing field of aerospace, automobiles, ships, etc., lightweight and high-strength structural components are one of the core requirements for improving product performance. The composite sandwich structure with excellent specific strength, specific stiffness and fatigue resistance has become the preferred solution for such key components. Among them, the leading edge component with specific functional opening design needs to achieve lightweight while ensuring the load-bearing capacity of the opening area and the continuity of the overall structure to meet the stringent requirements of high-end equipment for structural reliability.

[0003] At present, the opening machining of such composite material leading edge components is mainly realized by mechanical cutting or cutting after forming. In the opening position determination link, manual measurement and marking are mainly relied on for positioning. The mechanical processing after forming needs to adjust the process parameters according to the characteristics of the composite material, and the manual positioning completely relies on the experience of the operator to control the opening position accuracy.

[0004] However, the existing technology has certain problems: on the one hand, the composite material itself has anisotropy, and there is a combination interface of core material and skin inside the sandwich structure. After forming, mechanical processing is easy to damage the integrity of the internal structure of the material, causing delamination, tearing and other damage, which seriously affects the mechanical properties and service life of the component. On the other hand, the manual positioning method is greatly affected by human operation errors, and it is difficult to ensure the accuracy of the opening position, which may lead to deviation of the opening from the design requirements, thereby affecting the function implementation of the component. At the same time, the traditional processing method does not specially process the opening edge, which is easy to cause stress concentration and structural deformation, further reducing the overall reliability of the component and bringing hidden dangers to the safe operation of high-end equipment. Therefore, we urgently need a windowed leading edge forming method to solve the above problems. SUMMARY

[0005] An object of the present application is to provide a new technical solution for a windowed leading edge forming method, which realizes the windowed leading edge without delamination and tearing defects by precise positioning of a laser projector, windowed pre-laying and local strengthening, and smooth transition processing of the window edge, without mechanical processing after forming, thereby improving the structural strength, window load-bearing capacity and product consistency.

[0006] The object of the present application is achieved by a windowed leading edge forming method, comprising the following steps:

[0007] S1 positioning; determining the position of the design window on the leading edge component;

[0008] S2 outer skin forming: laying and curing composite material prepreg on the mold to form the outer skin;

[0009] S3 core layer and inner skin laying: laying first adhesive layer, honeycomb core, second adhesive layer, inner skin and electromagnetic shielding layer on the surface of the outer skin in sequence, the honeycomb core is provided with a honeycomb window at the corresponding position of the design window, and the inner skin covers the edge of the honeycomb window to form a local reinforced structure;

[0010] S4 overall curing: curing the laid structure, and obtaining the windowed leading edge through demolding after curing.

[0011] Optionally, in step S1, a laser projection positioning device is used to project the contour of the design window to the laying surface, and the projection position is adjusted to realize accurate positioning of the design window by comparing the projected contour with the reference point on the mold.

[0012] Optionally, in step S3, the edge of the honeycomb window is chamfered before the honeycomb core is laid.

[0013] Optionally, in step S3, when the inner skin is laid, the inner skin needs to completely cover the chamfered area of the honeycomb window.

[0014] Optionally, the size of the honeycomb window is greater than that of the design window, and the size of the honeycomb window in the length and width directions is greater than that of the design window in the corresponding direction.

[0015] Optionally, the laying range of the inner skin exceeds the edge of the honeycomb window.

[0016] Optionally, before step S4, the laying boundary of the inner skin at the design window is trimmed so that the opening contour of the inner skin is consistent with the design window.

[0017] Optionally, in step S3, the electromagnetic shielding layer covers the surface of the inner skin in the whole laying mode.

[0018] Optionally, the curing in step S2 and the curing in step S4 are performed twice, and the outer skin is glued to the subsequent laying layer through the first adhesive layer.

[0019] Optionally, the curing in step S2 and the curing in step S4 are performed twice, and the outer skin is glued to the subsequent laying layer through the first adhesive layer.

[0020] Compared with the prior art, the beneficial effects of the present application are as follows:

[0021] 1. According to one embodiment of the present disclosure, the windowed leading edge forming method realizes accurate positioning of the design window by comparing the projected pattern with the position of the reference point on the mold through the laser projector and gradually fine-tuning, replacing the traditional manual measurement marking, reducing human error, and significantly improving product consistency.

[0022] 2. According to one embodiment of the present disclosure, the windowed leading edge forming method avoids composite material delamination, tearing and other defects from the root by reserving the window position during the laying process, expanding the design window by 20mm in length and width direction compared with the honeycomb window, trimming the inner skin after over-laying, and simplifying the process flow.

[0023] 3. According to one embodiment of the present disclosure, the windowed leading edge forming method avoids stress concentration by chamfering the honeycomb periphery and window boundary, and the inner skin completely covers the chamfered area and realizes smooth transition of the window edge, effectively improving the overall structural strength of the leading edge and the bearing capacity of the window area.

[0024] 4. According to one embodiment of the present disclosure, the windowed leading edge forming method improves the interlayer adhesion reliability through the step-by-step process of "first curing the outer skin and then secondary bonding and curing", and guarantees the overall coverage of the electromagnetic shielding layer (lightning protection copper mesh) by differentiating the pre-vacuum compaction treatment at each laying stage, taking into account the structural stability and functional integrity, and further improving the forming quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0026] Figure 1 The flowchart of the present application.

[0027] Figure 2 The structural schematic diagram of the present application.

[0028] Figure 3 The positioning schematic diagram of the laser projector of the present application.

[0029] Figure 4 The honeycomb and inner skin window boundary schematic diagram of the present application.

[0030] The symbols in the figure are as follows: 1, mold; 2, outer skin; 3, adhesive film; 4, honeycomb; 5, inner skin; 6, reference point; 7, honeycomb window boundary; 8, inner skin window boundary. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] As shown in the figure, a windowed leading edge forming method comprises the following steps: Figures 1-4

[0033] S1 positioning; determining the position of the design window on the leading edge component.

[0034] Here, the blanking drawing of the windowed leading edge is made by means of the CPD module of the Catia software, the shape and size parameters of the design window are determined, and accurate size basis is provided for subsequent positioning and laying of each layer of material, so as to ensure that each link is consistent with the design requirements, and the positioning process is based on the structure reference of the mold 1.

[0035] Further, the laser projection positioning device is used to project the complete contour of the design window onto the laying surface, the reference point 6 on the mold 1 is a preset fixed marking point, the corresponding relationship between the projected contour and the reference point 6 is compared point by point, the projection position is adjusted gradually, and the deviation in the positioning process is reduced.

[0036] Further, after the positioning is completed, the consistency of the projected contour and the design parameters of the blanking drawing is checked again, temporary marks are made after it is confirmed that there is no deviation, and the adaptability of the projected window to the honeycomb 4 and the inner skin 5 for subsequent laying is checked, so as to avoid errors in the connection between positioning and subsequent processes, and lay a precise foundation for the entire forming process.

[0037] In step S1, the laser projection positioning device is used to project the contour of the design window onto the laying surface, and the projection position is adjusted to realize accurate positioning of the design window by comparing the projected contour with the reference point 6 on the mold 1.

[0038] Here, the laser projection positioning device is matched and calibrated in advance with the digital model of the design window, so as to ensure that the projected contour completely matches the design size and shape, and the projection range needs to cover the preset area of the honeycomb window boundary 7.

[0039] Further, the projection position is adjusted in a fine-tuning manner, the coincidence degree of the reference point 6 is compared after each adjustment, and the positioning accuracy of the honeycomb window boundary 7 is ensured to meet the design requirements until all the reference points 6 completely match the corresponding positions of the projected contour.

[0040] ​Furthermore, after confirming the positioning, the accuracy of the positioning is checked again, taking into account subsequent process requirements such as the enlarged size of the honeycomb window boundary 7 of honeycomb 4 and the inner skin window boundary 8 of inner skin 5 exceeding the range, to ensure that the window position can meet the needs of structural reinforcement and the laying of each layer of materials.

[0041] S2 Outer Skin 2 Forming: Composite material prepreg is laid on mold 1 and cured to form outer skin 2.

[0042] Here, the surface of mold 1 is first cleaned 3 to 5 times with acetone or anhydrous ethanol to ensure that there are no stains, dust or other impurities on the surface, so as to avoid affecting the fit between the prepreg and mold 1; cyanate quartz prepreg is used as the raw material for outer skin 2. The prepreg is cut according to the cutting drawing and placed on the baseline of the CNC cutting machine to ensure that the prepreg size is compliant.

[0043] Furthermore, the outer skin 2 adopts a whole-lay method. After the first layer is laid, the bag is pre-extracted for more than 15 minutes. After that, a pre-extraction and compaction is carried out every 4 layers laid, with each pre-extraction time being 5 minutes. A total of 10 layers of prepreg are laid. By pre-extracting in sections, the air between the layers is discharged to avoid defects such as bubbles and delamination after curing.

[0044] Furthermore, after the outer skin is laid out, the release film, breathable felt, and high-temperature vacuum bag are placed in sequence to complete the bag making process. Then, the outer skin is cured in an autoclave according to the specified curing parameters. The standardized bag making and curing process can improve the molding strength and density of the outer skin 2, laying a good foundation for subsequent secondary bonding.

[0045] S3 Core Layer and Inner Skin Laying: On the surface of the outer skin 2, the first adhesive layer, honeycomb 4, second adhesive layer, inner skin 5 and electromagnetic shielding layer are laid in sequence. The honeycomb 4 has honeycomb window boundary 7 at the corresponding position of the designed window. The inner skin 5 covers the edge of the honeycomb window boundary 7 to form a local reinforcement structure.

[0046] Here, both the first and second adhesive layers use H-3D-1 film 3, the honeycomb 4 is a 22mm thick honeycomb material, the inner skin 5 uses cyanate quartz prepreg, and the electromagnetic shielding layer is a lightning protection copper mesh. The first adhesive layer, the second adhesive layer, and the inner skin 5 all adopt a window design, and the window position corresponds precisely to the honeycomb window boundary 7, forming the preset range of the inner skin window boundary 8. It is worth noting that before laying, the release cloth needs to be cut according to the cutting diagram made by the Catia software using a cutting machine. After cutting, it is used in conjunction with the honeycomb 4. An additional layer of H-3D-1 film 3 needs to be laid between the inner skin 5 and the electromagnetic shielding layer (lightning protection copper mesh) as an adhesive layer.

[0047] Furthermore, a pre-extraction process is performed after every two layers of material are laid, with a pre-extraction time of 8 minutes. For the inner skin 5, an additional pre-extraction is performed after every four layers are laid, with the same pre-extraction time of 8 minutes. This segmented pre-extraction ensures that each layer is tightly bonded without gaps, improving the interlayer bonding strength and overall structural stability. Additionally, the honeycomb 4 near the tail end needs to be perforated according to the size and spacing of the release cloth to meet the subsequent demolding requirements.

[0048] Furthermore, the alignment of each layer is checked in real time during the installation process to ensure that the central axes of the first adhesive layer, honeycomb 4, second adhesive layer, inner skin 5, H-3D-1 adhesive film 3 and electromagnetic shielding layer are consistent, so as to avoid uneven stress caused by structural eccentricity. At the same time, it ensures the precise alignment of the honeycomb window boundary 7 and the inner skin window boundary 8. Before the honeycomb 4 is installed, the edges of the window and the surrounding perimeter must be chamfered.

[0049] In step S3, before laying the honeycomb 4, the edges of the honeycomb window boundary 7 are chamfered.

[0050] Here, a special tool is used to smooth and chamfer the edges of the honeycomb window boundary 7 and the surrounding perimeter of the honeycomb 4. At the same time, the honeycomb 4 is cut according to the drawing, and the honeycomb 4 is hollowed out near the tail according to the size and spacing of the release cloth. The hollowed-out tail design can meet the subsequent demolding requirements and avoid damage to the structure during demolding.

[0051] Furthermore, the chamfer angle is designed to fully cover the inner skin 5, ensuring that the inner skin 5 can smoothly fit the chamfered surface during installation without any wrinkles, thus creating conditions for the subsequent tight covering of the inner skin 5.

[0052] Furthermore, after chamfering, debris at the edge of the honeycomb window boundary 7 is cleaned to ensure that no residual impurities affect the bonding effect between the first adhesive layer and the honeycomb 4, and between the honeycomb 4 and the second adhesive layer, thus ensuring the reliability of the interlayer connection.

[0053] In step S3, when laying the inner skin 5, the inner skin 5 must completely cover the chamfered area of ​​the honeycomb window boundary 7, and the laying range of the inner skin 5 extends beyond the edge of the honeycomb window boundary 7.

[0054] Here, when laying the inner skin 5, it is slowly attached along the beveled area of ​​the honeycomb window boundary 7 of the honeycomb 4 to ensure no wrinkles or curling edges, and to completely cover the beveled surface. The beveled part of the honeycomb 4 needs to be cut to ensure that the inner skin 5 can be tightly attached.

[0055] Furthermore, the inner skin 5 extends 20mm beyond the edge of the honeycomb window boundary 7. This dimension is consistent with the size of the honeycomb window boundary 7 compared to the designed window size, reserving sufficient material for local structural reinforcement in the window area, ensuring that the window load-bearing capacity meets the design requirements, and forming the initial range of the inner skin window boundary 8.

[0056] Furthermore, during the paving process, the flatness of the excess area is checked to ensure that there is no looseness or bulge in the excess area, and to ensure that the inner skin 5 is wrinkle-free and warped after paving, laying the foundation for the subsequent trimming of the inner skin window boundary 8.

[0057] The size of the cellular window boundary 7 is larger than the size of the design window, and the size of the cellular window boundary 7 in both the length and width directions is larger than the size of the design window in the corresponding direction.

[0058] Here, the dimensions of the cell window boundary 7 of cell 4 are 20mm larger than those of the corresponding design window in both the length and width directions.

[0059] Furthermore, the extent of size expansion is determined based on the load-bearing requirements of the window area, ensuring that the reserved material can meet the strength enhancement requirements while avoiding excessive expansion that would lead to material waste, thus achieving a balance between structural rationality and economy.

[0060] Furthermore, the dimensional error of the cellular window boundary 7 is strictly controlled within the design allowable range to ensure that the window enlargement size of each product is uniform, improve product consistency, and avoid affecting the overall performance due to individual size differences.

[0061] In step S3, the electromagnetic shielding layer is laid out in one piece to cover the surface of the inner skin 5.

[0062] Here, the electromagnetic shielding layer uses a lightning protection copper mesh. Before laying it, an H-3D-1 adhesive film 3 needs to be laid on the surface of the inner skin 5. When laying the copper mesh, it completely covers the surface of the inner skin 5 without any omissions or overlaps, ensuring full coverage of the electromagnetic shielding and lightning protection functions and meeting the functional requirements of the component.

[0063] Furthermore, the copper mesh is bonded and fixed to the inner skin 5 through the H-3D-1 adhesive film 3. When the adhesive film 3 is laid, it evenly covers the surface of the inner skin 5 without any gaps, ensuring that the copper mesh and the inner skin 5 are tightly bonded and preventing the copper mesh from falling off during use.

[0064] Furthermore, after the copper mesh is laid, check the surface flatness to ensure there are no wrinkles or damage. If wrinkles appear, smooth them out in time. If there is damage, replace the copper mesh in time to avoid affecting the electromagnetic shielding effect due to defects in the copper mesh.

[0065] S4 Overall Curing: The laid structure is cured. After curing, the open front edge is obtained by demolding. Before step S4, the laying boundary of the inner skin at the design window is trimmed so that the opening outline of the inner skin is consistent with the design window.

[0066] Here, after the inner skin 5 is laid and the dimensions and flatness meet the requirements, a special tool is used to trim along the design window outline. During trimming, the thickness of the prepreg at the window edge needs to be smoothly transitioned to ensure that the trimming time is reasonable and to avoid premature trimming that may cause dimensional deviation. After trimming, the opening outline is checked again to ensure consistency with the dimensions of the design window. After confirming that there is no deviation, the debris generated during trimming is cleaned up before proceeding to the subsequent bag making process.

[0067] Furthermore, before curing, a comprehensive inspection of the laying of all layers is conducted to confirm that there are no defects such as missing layers, incorrect layers, or wrinkles. At the same time, the consistency between the opening outline of the inner skin 5 after trimming and the design window is checked. Then, according to the bag making requirements of secondary bonding, the release film, breathable felt, and high-temperature vacuum bag are placed in sequence to complete the bag making, so as to avoid irreparable quality problems after curing.

[0068] Furthermore, the temperature, pressure, and holding time of the autoclave are controlled according to preset curing parameters to ensure that the material is subjected to uniform stress and temperature during the curing process, so that each layer of material is fully cured, thereby improving the strength and density of the overall structure. After curing, the material is first cooled to room temperature, and then auxiliary materials such as the release film, breathable felt, and high-temperature vacuum bag are gradually removed for demolding. The demolding process is handled gently to avoid structural deformation. After demolding, the surface quality of the product is inspected in a timely manner to check for defects such as bubbles, delamination, and damage.

[0069] The curing in step S2 and the curing in step S4 are carried out in two separate steps. The outer skin 2 is bonded to the subsequent lay-up through the first adhesive layer.

[0070] Here, the first curing is the independent curing of the outer skin 2, which ensures the structural strength and stability of the outer skin 2 after molding, and provides a reliable base carrier for the subsequent laying and bonding of each layer; the second curing is the secondary bonding curing of the overall structure, which realizes the firm bonding of the outer skin 2 with the first adhesive layer, honeycomb 4, second adhesive layer, inner skin 5, H-3D-1 adhesive film 3 and electromagnetic shielding layer.

[0071] Furthermore, the first adhesive layer (H-3D-1 adhesive film 3) completely covers the surface of the outer skin 2 during application, with no gaps, ensuring the integrity of the adhesive surface between the outer skin 2 and the honeycomb 4, and improving the uniformity and reliability of the adhesive bonding.

[0072] Furthermore, after the outer skin 2 has cured, a surface quality inspection is carried out first. Visual inspection and special tools are used to check for defects such as bubbles, delamination, and damage. Only after confirming that there are no defects such as bubbles, delamination, and damage are the first adhesive layer and subsequent layers are laid. This prevents the defective outer skin 2 from entering the subsequent process and reduces rework costs.

[0073] Both steps S2 and S4 involve curing in an autoclave, and in both steps S2 and S3, pre-vacuum compaction is performed simultaneously during the material laying process.

[0074] Here, autoclave curing provides a uniform and stable temperature and pressure environment, ensuring that the material is subjected to uniform stress and consistent temperature transfer during the two curing processes, avoiding insufficient or over-curing in certain areas, and improving the consistency and stability of the product.

[0075] Furthermore, in step S2, the first layer of prepreg bag is pre-extracted for more than 15 minutes, and every 4 layers are pre-extracted for 5 minutes; in step S3, every 2 layers are pre-extracted for 8 minutes, and the inner skin 5 is pre-extracted for 8 minutes every 4 layers. The differentiated pre-extraction time settings are specifically adapted to the air removal needs of different layering stages to ensure that there is no air residue between layers.

[0076] Furthermore, after pre-extraction and compaction, subsequent laying or bag-making processes should be carried out promptly to avoid excessive intervals that could lead to loosening between layers or re-infiltration of air, thus ensuring the pre-extraction effect and further improving the interlayer bonding quality and overall curing effect. During bag making, high-temperature vacuum bags should be placed as required to ensure a stable vacuum environment.

[0077] In this invention, the surface of mold 1 is first cleaned 3-5 times with acetone / anhydrous ethanol. Then, the material cutting diagram is created using the CPD module of Catia software. Subsequently, a laser projector is used for precise window positioning. By comparing the projected pattern with the reference point 6 on mold 1, the projected position is gradually adjusted until it completely coincides with the design position, replacing traditional manual measurement and effectively avoiding positioning errors. After positioning is completed, cyanate quartz prepreg is laid on mold 1 as outer skin 2. Every 4 layers are pre-pressed for 5 minutes (the first layer is pre-pressed for more than 15 minutes). After a total of 10 layers are laid, the isolation film, breathable felt, and high-temperature vacuum bag are placed in sequence to form a bag. The bag is cured in a hot autoclave. After curing, the surface quality of outer skin 2 is inspected to ensure that there are no defects such as bubbles and delamination.

[0078] When entering the secondary bonding and layering stage: first, lay the adhesive film 3 (first adhesive layer, model H-3D-1), then lay the 22mm thick honeycomb 4 with beveled edges (around the perimeter and window edges) and hollowed-out tail. The honeycomb window boundary 7 of the honeycomb 4 is 20mm larger than the designed window in both length and width. Then, lay the second adhesive layer (adhesive film 3) and the inner skin 5 with the window design. An adhesive film 3 needs to be laid between the inner skin 5 and the lightning protection copper mesh. The inner skin 5 needs to completely cover the beveled area of ​​the honeycomb window boundary 7, and the laying range extends 20mm beyond the boundary. Pre-dry for 8 minutes after laying two layers (pre-dry for an additional 8 minutes after every 4 layers of inner skin 5). Finally, lay the entire lightning protection copper mesh (electromagnetic shielding layer). After the inner skin 5 is laid, trim the excess part along the designed window outline. When trimming, the thickness of the prepreg at the window edge is smoothly transitioned to form a regular inner skin window boundary 8, achieving a smooth transition around the window, ensuring the continuity of the front edge structure, and avoiding stress concentration.

[0079] After trimming, the bags are made again (with the release film, breathable felt, and high-temperature vacuum bag placed inside). They are then cured a second time in an autoclave. After curing and cooling to room temperature, the bags are demolded, all auxiliary materials are removed, and the surface quality of the products is inspected.

[0080] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for forming a window-type leading edge, characterized in that: Includes the following steps: S1 Positioning; Determines the position of the design window on the leading edge component; S2 outer skin forming: Composite material prepreg is laid on the mold and cured to form the outer skin; S3 Core Layer and Inner Skin Laying: On the surface of the outer skin, the first adhesive layer, honeycomb core, second adhesive layer, inner skin and electromagnetic shielding layer are laid in sequence. The honeycomb core has honeycomb windows at the corresponding positions of the designed windows. The inner skin covers the edge of the honeycomb windows to form a local reinforcement structure. S4 Overall Curing: The structure after installation is cured, and after curing, it is demolded to obtain a window-shaped leading edge.

2. The method for forming a windowed leading edge according to claim 1, characterized in that: In step S1, a laser projection positioning device is used to project the outline of the design window onto the tiling surface. By comparing the projected outline with the reference point on the mold, the projection position is adjusted to achieve precise positioning of the design window.

3. The method for forming a windowed leading edge according to claim 1, characterized in that: In step S3, before laying the honeycomb core, the edges of the honeycomb window are chamfered.

4. The window-type leading edge forming method according to claim 3, characterized in that: In step S3, when the inner skin is laid, the inner skin must completely cover the chamfered area of ​​the honeycomb window.

5. The method for forming a windowed leading edge according to claim 1, characterized in that: The size of the cellular window is larger than the size of the design window, and the size of the cellular window in both the length and width directions is larger than the size of the design window in the corresponding direction.

6. The method for forming a windowed leading edge according to claim 5, characterized in that: The inner skin is laid beyond the edge of the honeycomb window.

7. The method for forming a windowed leading edge according to claim 6, characterized in that: Before step S4, the laying boundary of the inner skin at the design window is trimmed so that the opening outline of the inner skin is consistent with the design window.

8. The method for forming a windowed leading edge according to claim 1, characterized in that: In step S3, the electromagnetic shielding layer is laid out in a continuous manner to cover the surface of the inner skin.

9. The method for forming a windowed leading edge according to claim 1, characterized in that: The curing in step S2 and the curing in step S4 are carried out in two separate steps. The outer skin is bonded to the subsequent lay-up layers through the first adhesive layer.

10. The method for forming a windowed leading edge according to claim 1, characterized in that: Both steps S2 and S4 involve curing in an autoclave, and in both steps S2 and S3, pre-vacuum compaction is performed simultaneously during the material laying process.

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