Lightweight high-strength honeycomb core aluminum plate

Abstract

The utility model provides a kind of lightweight high-strength honeycomb core aluminum plate, belong to metal sheet field, including aluminum plate base body, the surface of aluminum plate base body is provided with the composite mechanism for improving the strength of aluminum plate base body. 3 , 8-10% lower than traditional aluminum alloy, tensile strength reaches 550-600MPa, yield strength is greater than or equal to 500MPa, meets the structural load demand, aramid paper honeycomb density is only 40-80kg / m 3 , aramid honeycomb shear strength is greater than or equal to 3MPa, effectively resist transverse load, by crushing deformation absorption impact energy, modified epoxy resin adhesive film T type peel strength is greater than or equal to 15N / cm, ensure that honeycomb core and panel long-term combination, set up carbon fiber reinforced polymer, make overall bending modulus increase 40-60%, tensile strength reaches 1500MPa, panel layer uses 7075-T6 aluminum alloy, surface hardness reaches 150HB, scratch resistance is superior to ordinary aluminum plate, polyvinylidene fluoride fluorocarbon coating QUV accelerated aging 5000h after light retention rate is greater than or equal to 85%, applicable to outdoor scene.

Description

Technical Field

[0001] This utility model relates to the field of metal sheets, and more specifically, to a lightweight, high-strength honeycomb core aluminum sheet. Background Technology

[0002] In modern industry and construction, honeycomb structures, as a unique biomimetic structure, have excellent mechanical properties. Their hexagonal honeycomb cells can effectively disperse and withstand external forces, providing a new approach to improving the performance of aluminum plates.

[0003] However, some honeycomb core aluminum panels on the market still have shortcomings in terms of process and material matching, resulting in strength that does not meet the ideal state, or in the failure to fully tap the potential in terms of lightweighting.

[0004] Therefore, a lightweight, high-strength honeycomb core aluminum plate is proposed. Utility Model Content

[0005] The purpose of this utility model is to address the problem that some honeycomb core aluminum panels on the market still have shortcomings in terms of process and material matching, resulting in unsatisfactory strength or insufficient potential in terms of lightweighting.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] The present invention is as follows: a lightweight high-strength honeycomb core aluminum plate, comprising an aluminum plate substrate, wherein a composite mechanism for improving the strength of the aluminum plate substrate is provided on the surface of the aluminum plate substrate;

[0008] The composite structure includes a honeycomb core layer disposed on the outer surface of an aluminum plate substrate, an anti-creep adhesive layer disposed on the outer surface of the honeycomb core layer, a reinforcing layer for improving bending stiffness disposed on the outer side of the adhesive layer, a panel layer disposed on the reinforcing layer, and a surface functional layer disposed on the outer surface of the panel layer.

[0009] As a preferred technical solution of this utility model, the aluminum plate substrate is made of aluminum-lithium alloy material plate, which serves as the supporting base of the overall structure and provides initial rigidity.

[0010] As a preferred technical solution of this utility model, the honeycomb core layer adopts an aramid paper honeycomb structure, and the honeycomb core layer is hot-pressed and laminated with an aluminum plate substrate by an epoxy resin film (temperature 120-150℃, pressure 0.5-1.0MPa).

[0011] As a preferred technical solution of this utility model, the adhesive layer is made of modified epoxy resin film material, and the adhesive layer and the honeycomb core layer are co-cured by hot pressing to form a chemical bond.

[0012] As a preferred technical solution of this utility model, the reinforcing layer is made of carbon fiber reinforced polymer, which is co-cured with the adhesive layer through a vacuum bag pressing process to form a molecular-level bond.

[0013] As a preferred technical solution of this utility model, the panel layer is made of 7075-T6 aluminum alloy, which is hot-pressed together with the reinforcing layer, and the surface is anodized (thickness ≥10μm) to improve the bonding force.

[0014] As a preferred technical solution of this utility model, the surface functional layer adopts a polyvinylidene fluoride fluorocarbon coating, which forms a physical intercalation and chemical adsorption with the panel layer through electrostatic spraying or roller coating processes.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. The aluminum-lithium alloy used has a density of approximately 2.55 g / cm³. 3 Compared to traditional aluminum alloys, it reduces costs by 8-10%, achieves a tensile strength of 550-600 MPa, and a yield strength ≥500 MPa, meeting structural load-bearing requirements. The aramid paper honeycomb density is only 40-80 kg / m³. 3 The aramid honeycomb shear strength is ≥3MPa, effectively resisting lateral loads and absorbing impact energy through crushing deformation. The modified epoxy resin film has a T-peel strength ≥15N / cm, ensuring long-term bonding between the honeycomb core and the panel.

[0017] 2. By using carbon fiber reinforced polymer, the overall flexural modulus is increased by 40-60%, and the tensile strength reaches 1500MPa. The panel layer is made of 7075-T6 aluminum alloy with a surface hardness of 150HB. Its scratch resistance is better than that of ordinary aluminum plates. The polyvinylidene fluoride fluorocarbon coating retains ≥85% of its gloss after 5000 hours of QUV accelerated aging, making it suitable for outdoor scenarios. Attached Figure Description

[0018] Figure 1 A schematic diagram of the lightweight, high-strength honeycomb core aluminum plate provided by this utility model;

[0019] Figure 2 A cross-sectional view of the lightweight, high-strength honeycomb core aluminum plate provided by this utility model;

[0020] Figure 3 An exploded structural diagram of the lightweight, high-strength honeycomb core aluminum plate provided by this utility model;

[0021] Figure 4 The lightweight, high-strength honeycomb core aluminum plate provided by this utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0022] The diagram shows: 1. Aluminum plate substrate; 2. Composite structure; 201. Honeycomb core layer; 202. Adhesive layer; 203. Reinforcing layer; 204. Panel layer; 205. Surface functional layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0024] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] like Figures 1-4 As shown, this embodiment proposes a lightweight high-strength honeycomb core layer aluminum plate, including an aluminum plate substrate 1, and a composite mechanism 2 for improving the strength of the aluminum plate substrate 1 is provided on the surface of the aluminum plate substrate 1.

[0028] The composite structure 2 includes a honeycomb core layer 201 disposed on the outer surface of the aluminum plate substrate 1, an anti-creep adhesive layer 202 disposed on the outer surface of the honeycomb core layer 201, a reinforcing layer 203 for improving bending stiffness disposed on the outer side of the adhesive layer 202, a panel layer 204 disposed on the reinforcing layer 203, and a surface functional layer 205 disposed on the outer surface of the panel layer 204.

[0029] like Figure 3 As shown, in a preferred embodiment, based on the above method, the aluminum plate substrate 1 is further made of aluminum-lithium alloy material plate as the supporting base of the overall structure, providing initial stiffness, which is higher than that of traditional aluminum alloys (such as 6061-T6, 2.7g / cm). 3 It reduces weight by 8-10%, and the fatigue limit of aluminum-lithium alloy reaches 200MPa, while the fatigue crack propagation rate is reduced by 30% compared with traditional aluminum alloy.

[0030] like Figure 3As shown, in a preferred embodiment, based on the above method, the honeycomb core layer 201 further adopts an aramid paper honeycomb structure. The honeycomb core layer 201 is hot-pressed and bonded to the aluminum plate substrate 1 with an epoxy resin film (temperature 120-150℃, pressure 0.5-1.0MPa). The density of the aramid paper honeycomb is only 40-80kg / m³. 3 It weighs only 50-60% of aluminum alloy honeycomb and 70-80% less than solid aluminum plates. The honeycomb hexagonal structure absorbs impact energy through controllable crushing deformation, with a specific energy absorption of 50-80 kJ / kg, which is 3-5 times that of solid aluminum plates.

[0031] like Figure 3 As shown, in a preferred embodiment, based on the above method, the adhesive layer 202 is further made of modified epoxy resin film material. The adhesive layer 202 and the honeycomb core layer 201 are co-cured by hot pressing to form a chemical bond. The T-type peel strength of the modified epoxy film is ≥15N / cm, which far exceeds the standard of structural adhesives (≥8N / cm), ensuring long-term load-bearing without delamination.

[0032] like Figure 3 As shown, in a preferred embodiment, based on the above method, the reinforcing layer 203 is made of carbon fiber reinforced polymer, which is co-cured with the adhesive layer 202 through a vacuum bag pressing process to form a molecular-level bond. The carbon fiber reinforced polymer increases the overall flexural modulus by 40-60% and the tensile strength reaches 1500MPa, which is 3-4 times that of aluminum alloy.

[0033] like Figure 3 As shown, in a preferred embodiment, based on the above method, the panel layer 204 is made of 7075-T6 aluminum alloy and is hot-pressed together with the reinforcing layer 203. The surface is anodized (thickness ≥10μm) to improve the bonding force, resulting in ultra-high strength and a surface hardness of 150HB. Its scratch resistance is better than that of ordinary aluminum plates. After anodizing (thickness ≥10μm), a dense aluminum oxide film is formed on the surface, and its salt spray resistance reaches more than 1000h.

[0034] like Figure 3 As shown, in a preferred embodiment, based on the above method, the surface functional layer 205 is further made of polyvinylidene fluoride fluorocarbon coating, which forms physical interlocking and chemical adsorption with the panel layer 204 through electrostatic spraying or roller coating process, providing weather resistance, self-cleaning and wear resistance.

[0035] Specifically, in use, the lightweight high-strength honeycomb core aluminum panel works as follows: the aluminum substrate 1 serves as the supporting base for the overall structure, providing initial rigidity; the honeycomb core layer 201 is hot-pressed to the aluminum substrate 1 via an epoxy resin film (temperature 120-150℃, pressure 0.5-1.0MPa); the adhesive layer 202 is co-cured with the honeycomb core layer 201 via hot pressing to form a chemical bond; the reinforcing layer 203 uses carbon fiber reinforced polymer, which is co-cured with the adhesive layer 202 via a vacuum bagging process to form a molecular-level bond; and the panel layer 204 uses 7... The 075-T6 aluminum alloy is hot-pressed and composited with the reinforcing layer 203. The surface is anodized (thickness ≥10μm) to improve the bonding strength. The surface functional layer 205 adopts a polyvinylidene fluoride fluorocarbon coating, which is formed with the panel layer 204 through electrostatic spraying or roller coating process to form physical interlocking and chemical adsorption. The honeycomb core layer 201 reduces the weight by 60-70%, and the aramid paper further reduces the weight by 30% compared with the aluminum alloy. The reinforcing layer 203 increases the bending stiffness by 2-3 times and significantly enhances the resistance to deformation. The honeycomb structure absorbs impact energy through controllable crushing and protects the core structure.

[0036] All technical features in this embodiment can be freely combined according to actual needs.

[0037] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A lightweight, high-strength honeycomb core aluminum plate, comprising an aluminum plate substrate (1), characterized in that, The surface of the aluminum plate substrate (1) is provided with a composite structure (2) for improving the strength of the aluminum plate substrate (1). The composite structure (2) includes a honeycomb core layer (201) disposed on the outer surface of the aluminum plate substrate (1), an anti-creep adhesive layer (202) disposed on the outer surface of the honeycomb core layer (201), an enhancement layer (203) for improving bending stiffness disposed on the outer side of the adhesive layer (202), a panel layer (204) disposed on the enhancement layer (203), and a surface functional layer (205) disposed on the outer surface of the panel layer (204).

2. The lightweight high-strength honeycomb core aluminum plate according to claim 1, characterized in that, The aluminum plate substrate (1) is made of aluminum-lithium alloy material plate, which serves as the supporting base of the overall structure and provides initial stiffness.

3. The lightweight high-strength honeycomb core aluminum plate according to claim 1, characterized in that, The honeycomb core layer (201) adopts an aramid paper honeycomb structure. The honeycomb core layer (201) is hot-pressed with an aluminum plate substrate (1) through an epoxy resin film at a temperature of 120-150℃ and a pressure of 0.5-1.0MPa.

4. The lightweight high-strength honeycomb core aluminum plate according to claim 1, characterized in that, The adhesive layer (202) is made of modified epoxy resin film material. The adhesive layer (202) and the honeycomb core layer (201) are chemically bonded by hot pressing and co-curing.

5. The lightweight, high-strength honeycomb core aluminum plate according to claim 1, characterized in that, The reinforcing layer (203) is made of carbon fiber reinforced polymer and is co-cured with the adhesive layer (202) through a vacuum bag pressing process to form a molecular-level bond.

6. The lightweight high-strength honeycomb core aluminum plate according to claim 1, characterized in that, The panel layer (204) is made of 7075-T6 aluminum alloy and is hot-pressed together with the reinforcing layer (203). The surface is anodized and the thickness is ≥10μm to improve the bonding force.

7. The lightweight, high-strength honeycomb core aluminum plate according to claim 1, characterized in that, The surface functional layer (205) is made of polyvinylidene fluoride fluorocarbon coating, which is physically integrated and chemically adsorbed with the panel layer (204) by electrostatic spraying or roller coating process.

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