Anti-deformation composite board for compartment

Abstract

The utility model discloses an anti-deformation composite board for a compartment, which comprises two skins and a middle filling layer adhered between the two skins, at least one of the skins is provided with an anti-deformation modeling section, a plurality of micro-concave models are integrally processed on the anti-deformation modeling section, and the micro-concave models are arranged in an arrayed manner. The micro-concave model is arranged in a shallow groove shape longitudinally penetrating through the skin. According to the utility model, the micro-concave shapes are integrally processed on the two skins, so that stronger resistance is formed in the direction perpendicular to the surfaces of the skins, the middle filling layer can be comprehensively bonded with the skins, and the deformation resistance of the composite board is obviously improved. The effect of improving the deformation resistance of the composite board can still be achieved under the condition that the board thickness is not increased or even reduced, and cost reduction and weight reduction are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of compartment components, in particular to an anti-deformation composite plate for compartments. Background Art

[0002] Vans utilize a closed cabin to transport goods. Some, such as light trucks, utilize composite panels to reduce vehicle weight while meeting insulation and earthquake resistance requirements. Especially with the increasing number of new energy vehicles, lightweight design has become a key consideration in reducing energy consumption and improving range.

[0003] Among them, Figure 9 As shown, the composite panels used in the above compartments are typically constructed by bonding two flat skins to a central filling layer. There are two main manufacturing processes: one involves pressing and bonding the two skins to a preformed, planar filling layer coated with colloid; the other involves filling the space between the two skins with foam material and then bonding the two together. Regardless of the manufacturing process, the bonding ultimately creates a solid, integrated panel structure between the two skins and the filling layer, ensuring the overall load-bearing performance of the composite panel.

[0004] During long-term use, the side panels of a vehicle body are inevitably subject to various types of compression, bumps, and other damage. These can easily cause significant bending, deformation, or denting of the composite panels, and in severe cases, can even lead to cracking and damage. In these cases, the composite panels need to be repaired or replaced, resulting in high maintenance costs for the vehicle body. To improve the composite panels' resistance to deformation, current methods include increasing the thickness of the skin, improving the skin material, and adding fiberglass to further enhance the panels' inherent strength. However, these methods increase the manufacturing cost of the composite panels and can easily lead to weight gain.

[0005] To this end, it is necessary to comprehensively consider factors such as the cost and weight of the vehicle body and provide a means to improve the deformation resistance of the composite panels to improve the above situation. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an anti-deformation composite plate for compartments which significantly improves the anti-deformation capability and is conducive to reducing costs and weight.

[0007] In order to solve the above technical problems, the technical solution of the utility model is: an anti-deformation composite panel for a compartment, comprising two skins and an intermediate filling layer bonded between the two skins, at least one of the skins being provided with an anti-deformation shaping section, and the anti-deformation shaping section being integrally processed with a plurality of arranged micro-concave shapes, and the micro-concave shapes being arranged in the shape of shallow grooves running vertically through the skins.

[0008] As a preferred technical solution, the cross-section of the micro-dimpled shape is triangular, wavy, trapezoidal or rectangular.

[0009] As a preferred technical solution, the thickness of the skin is 0.1 to 0.8 mm.

[0010] As a preferred technical solution, the depth of the micro-concave shape is 0.5 to 3 mm.

[0011] As a preferred technical solution, the spacing between adjacent micro-dimples is 10 to 60 mm.

[0012] As a preferred technical solution, one end of the two skins is respectively integrally processed with a connecting protrusion section, and the two connecting protrusion sections are interlocked to form a connecting protrusion structure; the other end of the two skins is respectively integrally processed with a connecting slot section, and the two connecting slot sections are interlocked to form a connecting slot structure.

[0013] As a preferred technical solution, the connecting protrusion section and / or the connecting slot section are / is integrally machined with a groove shape.

[0014] Due to the adoption of the above technical solution, the utility model achieves the following beneficial effects:

[0015] (1) The micro-concave shapes are integrally processed on the two skins to form a stronger resistance in the direction perpendicular to the skin surface; in addition, whether the composite board is prefabricated with an intermediate filling layer and then pressed into shape, or directly filled with foaming molding, the intermediate filling layer can easily enter between adjacent micro-concave shapes and form a comprehensive bond with the skin to achieve overall force. This, combined with the micro-concave shape, significantly improves the deformation resistance of the composite board;

[0016] (2) The present invention can achieve the effect of improving the deformation resistance of the composite plate without increasing the plate thickness, or even reducing the plate thickness. The thickness of the required skin raw material is only reduced, not increased. For composite plates whose weight mainly comes from the skin, this is beneficial to weight reduction. The reduction in the thickness of the skin raw material has little effect on the intermediate filling layer, which is beneficial to reducing manufacturing costs.

[0017] (3) The micro-concave shape has little effect on the surface flatness of the composite panel. After being assembled into a car body, the joint between the composite panel and the crossbeam has little effect, the driving wind resistance has little effect, and it is still convenient to perform operations such as advertising pasting, so it has little impact on the overall production and use environment of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0019] Figure 1 This is a transverse cross-sectional structural diagram of the composite panel of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at position Ⅰ;

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure when the micro-concave shape uses a wave shape;

[0022] Figure 4 yes Figure 2 Schematic diagram of the structure when the concave shape uses a trapezoid;

[0023] Figure 5 yes Figure 2 Schematic diagram of the structure when the concave shape uses a rectangle;

[0024] Figure 6 This is a schematic diagram of the structure of the utility model when the middle filling layer adopts two materials;

[0025] Figure 7 This is a schematic diagram of a Z-shaped support structure provided in the middle filling layer of the present invention;

[0026] Figure 8 This is a schematic diagram of a plate-shaped support structure provided in the middle filling layer of the utility model;

[0027] Figure 9 It is a transverse cross-sectional structural diagram of an existing composite panel.

[0028] In the figure: 1-skin; 11-connecting protrusion section; 12-connecting slot section; 13-groove shape; 2-middle filling layer; 3-connecting protrusion structure; 4-connecting slot structure; 5-anti-deformation shape section; 51-micro-concave shape; 6-support structure. DETAILED DESCRIPTION

[0029] The present invention is further described below with reference to the accompanying drawings and examples. In the detailed description that follows, certain exemplary embodiments of the present invention are described by way of illustration only. It goes without saying that those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of the claims.

[0030] like Figure 1As shown, the anti-deformation composite panel for a car body comprises two skins 1 and an intermediate filling layer 2 bonded between the two skins 1. Conventionally, one end of each of the two skins 1 is integrally machined with a connecting protrusion section 11, which interlocks to form a connecting protrusion structure 3; the other end of each of the two skins 1 is integrally machined with a connecting slot section 12, which interlocks to form a connecting slot structure 4. The above is well known in the art and will not be elaborated on here.

[0031] The intermediate filling layer 2 can be prefabricated into a plate shape and then bonded to the two skins 1 by colloid pressing, or can be formed by filling a foaming material between the two skins 1, or can be mixed and used, without limitation. Of course, the intermediate filling layer 2 can be made of one material or two or more materials. For example, when two materials are used, Figure 6 As shown, the middle portion of the two skins 1 can be made of a prefabricated plate, and the connecting protrusion structures 3 and the connecting slot structures 4 at both ends can be filled with foam material to form the intermediate filling layer 2. In this case, the connecting protrusion structures 3 and the connecting slot structures 4 at both ends can be made of a material with high strength after curing. This can significantly improve the filling effect and structural strength at both ends without significantly increasing manufacturing costs. The above solutions are all within the scope of protection of this utility model.

[0032] like Figure 1 As shown, at least one of the skins 1 in the composite panel is provided with an anti-deformation molding section 5, and the anti-deformation molding section 5 is integrally processed with a plurality of arranged micro-dimpled moldings 51, and the micro-dimpled moldings 51 are arranged in the shape of shallow grooves running through the skin 1. The micro-dimpled moldings 51 form micro-deformations on the skin 1, and the micro-deformations are arranged vertically, so that the skin 1 has a stronger resistance in the direction perpendicular to the surface. The micro-dimpled moldings 51 are easy to process, and after processing, as shown in FIG. Figures 2 to 5 As shown, no obvious deep grooves are formed between adjacent micro-concave shapes 51. Regardless of whether the composite panel is prefabricated with an intermediate filling layer 2 and then pressed into shape, or directly filled and foamed, the intermediate filling layer 2 can easily enter between adjacent micro-concave shapes 51 and form a comprehensive bond with the skin 1 to achieve overall force. This, combined with the micro-concave shapes 51, significantly improves the composite panel's ability to resist deformation.

[0033] Among them, Figures 2 to 5As shown, the cross-section of the dimples 51 is triangular, wavy, trapezoidal, or rectangular. The thickness of the skin 1 is 0.1 to 0.8 mm, the depth of the dimples 51 is 0.5 to 3 mm, and the spacing between adjacent dimples 51 is 10 to 60 mm. The shapes and depths of adjacent dimples 51 can be the same or different, and the spacing between adjacent dimples 51 in the same anti-deformation segment 5 can be the same or different. The skin 1 can be completely covered with one anti-deformation segment 5, or one or more anti-deformation segments 5 can be set at the desired location as needed, and the present invention does not impose any restrictions on this.

[0034] The micro-concave shape 51 has little effect on the surface flatness of the composite panel. After being assembled into a car body, the buckle connection between the composite panel and the crossbeam is little affected, the driving wind resistance is little affected, and it is still convenient to perform operations such as advertising pasting, so it has little impact on the overall production and use environment of the vehicle.

[0035] Preferably, if Figure 7 and Figure 8 As shown, a support structure 6 for supporting the two skins 1 is provided in the middle filling layer 2 to further improve the anti-deformation capability of the present invention. The support structure 6 can be a Z-shaped support, a plate support, a rectangular frame support, etc., which is not limited here.

[0036] Preferably, if Figure 1 As shown, a groove shape 13 is integrally processed on the connecting protrusion section 11 and / or the connecting slot section 12. The groove shape 13 improves the deformation resistance of the connecting protrusion section 11 or the connecting slot section 12, ensuring reliable connection between the composite panels during assembly.

[0037] Some examples are listed below for bending resistance and local impact tests, wherein the plane projection of the skin used in the examples listed is 100mm×100mm, and the skin material is Q235.

[0038] Example 1: The skin thickness is 0.1 mm, the dimples are triangular, the depth is 0.5 mm, and the distance between adjacent dimples is 60 mm.

[0039] Example 2: The skin thickness is 0.2 mm, the dimples are triangular, the depth is 1 mm, and the distance between adjacent dimples is 20 mm.

[0040] Example 3: The skin thickness is 0.6 mm, the dimples are triangular, the depth is 2 mm, and the distance between adjacent dimples is 40 mm.

[0041] Example 4: The skin thickness is 0.8 mm, the dimples are triangular, the depth is 3 mm, and the distance between adjacent dimples is 10 mm.

[0042] Example 5: The skin thickness is 0.1 mm, the dimples are wavy, the depth is 0.5 mm, and the distance between adjacent dimples is 60 mm.

[0043] Example 6: The skin thickness is 0.2 mm, the dimples are wavy, the depth is 1 mm, and the distance between adjacent dimples is 20 mm.

[0044] Example 7: The skin thickness is 0.6 mm, the dimples are wavy, the depth is 2 mm, and the distance between adjacent dimples is 40 mm.

[0045] Example 8: The skin thickness is 0.8 mm, the dimples are wavy, the depth is 3 mm, and the distance between adjacent dimples is 10 mm.

[0046] Example 9: The skin thickness is 0.1 mm, the dimples are trapezoidal, the depth is 0.5 mm, and the distance between adjacent dimples is 60 mm.

[0047] Example 10: The skin thickness is 0.2 mm, the dimples are trapezoidal, the depth is 1 mm, and the distance between adjacent dimples is 20 mm.

[0048] Example 11: The skin thickness is 0.6 mm, the dimples are trapezoidal, the depth is 2 mm, and the distance between adjacent dimples is 40 mm.

[0049] Example 12: The skin thickness is 0.8 mm, the dimples are trapezoidal, the depth is 3 mm, and the distance between adjacent dimples is 10 mm.

[0050] Example 13: The skin thickness is 0.1 mm, the dimples are rectangular, the depth is 0.5 mm, and the distance between adjacent dimples is 60 mm.

[0051] Example 14: The skin thickness is 0.2 mm, the dimples are rectangular, the depth is 1 mm, and the distance between adjacent dimples is 20 mm.

[0052] Example 15: The skin thickness is 0.6 mm, the dimples are rectangular, the depth is 2 mm, and the distance between adjacent dimples is 40 mm.

[0053] Example 16: The skin thickness is 0.8 mm, the dimples are rectangular, the depth is 3 mm, and the distance between adjacent dimples is 10 mm.

[0054] Comparative Examples 1 to 4: The skins are all flat-plate type, and the thicknesses of the skins are 0.1 mm, 0.3 mm, 0.5 mm, and 0.8 mm, respectively.

[0055] The bending test method involves laying the skin flat, fixing 10mm lengths at each end, and applying a 100N pressure to the stress-bearing area in the middle, measuring 10mm x 100mm. The bending test results are shown in the table below.

[0056]

[0057]

[0058] From the above data, it can be seen that, when compared with Comparative Example 1, Examples 1, 5, 9, and 13, and when compared with Comparative Example 4, Examples 4, 8, 12, and 16, at the same thickness, the deformation of the skin with the micro-dimpled shape is significantly smaller. Furthermore, when compared with Comparative Example 2, Examples 2, 6, 10, and 14, and when compared with Comparative Example 4, Examples 3, 7, 11, and 15, it can be seen that, even when the plate thickness is reduced, the present invention can still improve the composite plate's ability to resist bending deformation, and the required thickness of the skin raw material is only reduced, not increased. For composite plates whose weight is primarily derived from the skin, this is beneficial for weight reduction. The reduction in the thickness of the skin raw material has little impact on the intermediate filling layer 2, but the amount of skin material used is reduced, which helps reduce manufacturing costs.

[0059] In addition, it can be seen from Examples 1 to 16 that, under the same thickness, the same micro-dimple shape depth and spacing, the skin with a rectangular micro-dimple shape has a more obvious ability to resist bending deformation than the skin with a triangular, wavy, or trapezoidal micro-dimple shape, and the ability to resist bending deformation is more prominent when the plate thickness is small; this is because the rectangle has only planes and vertical surfaces, but no inclined surfaces, compared to the triangle, wavy, and trapezoidal shapes, and under this structure, multiple micro-dimple shapes have a stronger ability to resist the same linear load.

[0060] The local impact test method involves laying the skin flat and constraining all translational degrees of freedom on all four sides. A spherical punch weighing 0.1 kg and 10 mm in diameter is dropped freely from a height of 3 m. The impact energy is converted to an impact velocity of 7.672 m / s, impacting the center of the skin to measure deformation and displacement. The local impact test results are shown in the table below.

[0061]

[0062] In the tests, flat skins, as well as skins with triangular, wavy, and trapezoidal dimples, all experienced rebound when subjected to localized impact. Comparing Examples 1, 5, and 9 to Comparative Example 1, and Examples 4, 8, and 12 to Comparative Example 4, revealed that skins with triangular, wavy, and trapezoidal dimples exhibited superior maximum and final deformations compared to flat skins of similar thickness, demonstrating enhanced resistance to deformation under localized impact.

[0063] When subjected to a localized impact, the skin with rectangular dimples, due to its distinct folding characteristics and relatively large deformation space, does not experience impact rebound. By comparing Example 1 with Comparative Example 1, the maximum deformation of the skin with rectangular dimples exceeds that of the flat plate. However, as the plate thickness increases, the gap between the final deformation and the flat plate gradually narrows. At a thickness of approximately 0.8 mm, as shown by comparing Example 16 with Comparative Example 4, the final deformation is already less than that of a flat plate of the same thickness. This means that even when the thickness is relatively thick, the skin with rectangular dimples exhibits enhanced resistance to deformation under localized impact.

[0064] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An anti-deformation composite panel for a vehicle compartment, comprising two skins and an intermediate filling layer bonded between the two skins, characterized in that: At least one of the skins is provided with an anti-deformation shaping section, and the anti-deformation shaping section is integrally processed with a plurality of arranged micro-concave shapes, and the micro-concave shapes are arranged in the shape of shallow grooves running vertically through the skin.

2. The anti-deformation composite panel for a compartment according to claim 1, characterized in that: The cross section of the micro-concave shape is triangular, wavy, trapezoidal or rectangular.

3. The anti-deformation composite panel for a compartment according to claim 1, characterized in that: The thickness of the skin is 0.1-0.8 mm.

4. The anti-deformation composite panel for a compartment according to claim 1, characterized in that: The depth of the micro-concave shape is 0.5 to 3 mm.

5. The anti-deformation composite panel for a compartment according to claim 1, characterized in that: The distance between adjacent micro-concave shapes is 10 to 60 mm.

6. The anti-deformation composite panel for a compartment according to claim 1, characterized in that: One end of the two skins is respectively integrally processed with a connecting protrusion section, and the two connecting protrusion sections are buckled together to form a connecting protrusion structure; the other end of the two skins is respectively integrally processed with a connecting slot section, and the two connecting slot sections are buckled together to form a connecting slot structure.

7. The anti-deformation composite panel for a compartment according to claim 6, characterized in that: The connecting protrusion section and / or the connecting slot section are / is integrally formed with a groove shape.

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