Anti-deformation composite board for compartment

Abstract

The invention discloses an anti-deformation composite board for a compartment, which comprises two skins and a middle filling layer bonded between the two skins, at least one of the skins is provided with an anti-deformation modeling section, a plurality of micro-concave models arranged in an array are integrally processed on the anti-deformation modeling section, and the micro-concave models are arranged in a shallow groove shape longitudinally penetrating through the skins. According to the invention, the micro-concave models 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 invention relates to the technical field of box body components, and in particular to an anti-deformation composite plate for a box. Background Art

[0002] Vans use the closed environment of the compartment to transport goods. Some trucks, such as light goods, use composite panels to reduce the weight of the vehicle while meeting the requirements of heat preservation and earthquake resistance. Especially at this stage, with the increasing number of new energy vehicles, lightweight design of the vehicle body has always been an important consideration for new energy vehicles to reduce energy consumption and increase endurance.

[0003] Among them, Fig. 9 As shown in the figure, the composite panel used in the above compartment is usually made of two flat skins and a filling layer in the middle. There are two main manufacturing processes: one is to press and bond the two skins and the middle filling layer pre-formed into a plate shape with colloid, and the other is to fill the space between the two skins with foaming material and bond the two skins together. Regardless of the manufacturing process, the two skins and the middle filling layer form a full plate structure through bonding to ensure the overall stress performance of the composite panel.

[0004] During long-term use, the side panels of the car body will inevitably be subjected to various squeezes, bumps, etc. Squeezing and bumps can easily cause obvious bending deformation or pits in the composite panel, and in severe cases directly lead to its rupture and damage. In this case, the composite panel needs to be repaired or replaced, resulting in high maintenance costs for the car body. In order to improve the deformation resistance of the composite panel, the current main methods are to increase the thickness of the skin, improve the skin material, add glass fiber, etc. to further improve the strength of the composite panel itself, but these methods will increase the manufacturing cost of the composite panel and are very likely to increase weight.

[0005] In this regard, it is necessary to comprehensively consider factors such as the cost and weight of the car body and provide a means to improve the deformation resistance of the composite panel to improve the above situation. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an anti-deformation composite plate for a compartment which has significantly improved anti-deformation capability and is conducive to cost reduction and weight reduction.

[0007] In order to solve the above technical problems, the technical solution of the present invention 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 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 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 0.1-0.8 mm.

[0010] As a preferred technical solution, the depth of the micro-dimpled 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 present invention achieves the following beneficial effects:

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

[0016] (2) The present invention can achieve the effect of improving the anti-deformation ability of the composite plate without increasing the plate thickness, or even reducing the plate thickness. The thickness of the required skin raw material can only be reduced but not increased. For the composite plate whose weight is mainly generated by the skin, it is beneficial to form weight reduction. The reduction in the thickness of the skin raw material has little effect on the middle filling layer, which is beneficial to reduce the manufacturing cost.

[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 cross-sectional structural diagram of the composite plate of the present invention;

[0020] Figure 2 yes Figure 1Schematic 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 Structural diagram of the micro-dimpled shape using a trapezoid;

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

[0024] Figure 6 It is a schematic diagram of the structure when the middle filling layer of the present invention adopts two materials;

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

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

[0027] Fig. 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 in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill 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 protection of the claims.

[0030] like Figure 1 As shown, the anti-deformation composite plate for a car includes two skins 1 and an intermediate filling layer 2 bonded between the two skins 1. Conventionally, one end of the two skins 1 is respectively integrally processed with a connecting protrusion section 11, and the two connecting protrusion sections 11 are mutually buckled to form a connecting protrusion structure 3; the other end of the two skins 1 is respectively integrally processed with a connecting slot section 12, and the two connecting slot sections 12 are mutually buckled to form a connecting slot structure 4. The above is a well-known technology in the art and will not be repeated here.

[0031] The intermediate filling layer 2 can be prefabricated into a plate shape and then bonded to the two skins 1 by colloid pressure, or can be formed by filling a foaming material between the two skins 1, or can be mixed and used, which is not limited here. Of course, the intermediate filling layer 2 can be made of one material, or made of two or more materials. For example, when two materials are used, Figure 6 As shown, the middle part 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 foaming materials to form the middle filling layer 2 together; in this case, the parts of the connecting protrusion structures 3 and the connecting slot structures 4 at both ends can be made of materials with higher strength after curing, which can significantly improve the filling effect and structural strength at both ends without significantly increasing the manufacturing cost. The above solutions should all be within the protection scope of the present invention.

[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 a shallow groove shape 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 forms a stronger resistance in a direction perpendicular to the surface, and 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. No matter whether the composite panel is prefabricated with the 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 5 As shown, the cross section of the dimple shape 51 is triangular, wavy, trapezoidal or rectangular. The thickness of the skin 1 is 0.1-0.8 mm, the depth of the dimple shape 51 is 0.5-3 mm, and the spacing between adjacent dimple shapes 51 is 10-60 mm. The shapes and depths of adjacent dimple shapes 51 can be the same or different, and the spacing between adjacent dimple shapes 51 in the same anti-deformation shaping section 5 can be the same or different. The skin 1 can be fully covered with one anti-deformation shaping section 5, or one or more anti-deformation shaping sections 5 can be set at the required position as needed, and the present invention is not limited thereto.

[0034] The micro-concave shape 51 has little effect on the surface flatness of the composite board. After being assembled into a car body, the buckle connection between the composite board 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-shaped support, a rectangular frame support, etc., which is not limited here.

[0036] Preferably, if Figure 1 As shown, the connecting protrusion section 11 and / or the connecting slot section 12 are integrally machined with a groove shape 13, and the groove shape 13 improves the deformation resistance of the connecting protrusion section 11 or the connecting slot section 12 to ensure reliable insertion between the composite panels during assembly.

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

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

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

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

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

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

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

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

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

[0046] Embodiment 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] Embodiment 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] Embodiment 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] Embodiment 12: The skin thickness is 0.8 mm, the micro-dimples are trapezoidal in shape, the depth is 3 mm, and the distance between adjacent micro-dimples is 10 mm.

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

[0051] Embodiment 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] Embodiment 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] Embodiment 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 is to lay the skin flat, fix 10mm length at both ends of the skin, the middle stress area is 10mm×100mm, and apply 100N pressure to the stress area. The bending test results are shown in the following table.

[0056]

[0057]

[0058] From the above data, it can be seen that, when compared with Example 1, Example 1, Example 13, and Example 14, and Example 15, Example 16, Example 17, Example 18, Example 19, Example 20, Example 21, Example 22, Example 23, Example 24, and Example 25, Example 26, Example 27, Example 28, Example 29, Example 29, Example 20, Example 21, Example 22, Example 23, Example 24, Example 25, Example 26, Example 27, Example 28, Example 29, Example 29, Example 20, Example 21, Example 29, Example 20, Example 21, Example 22, Example 23, Example 24, Example 25, Example 26, Example 27, Example 28, Example 29, Example 29, Example 20 ...0, Example 20, Example 21, Example 21, Example 22

[0059] In addition, it can be seen from Examples 1 to 16 that, under the same thickness, the same micro-dimple depth and spacing, the skin with rectangular micro-dimples has a more obvious ability to resist bending deformation than the skin with triangular, wavy, or trapezoidal micro-dimples, 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 elevations, but no inclined surfaces, compared to the triangle, wavy, or trapezoid, and under this structure, multiple micro-dimples have a stronger ability to resist the same linear load.

[0060] The local impact test method is to lay the skin flat, constrain all translational degrees of freedom on the four sides of the skin, use a spherical punch with a weight of 0.1kg and a diameter of 10mm, and drop it freely from a height of 3m. The punch impact energy is converted into an impact speed of 7.672m / s, and the impact is applied to the center of the skin to test the deformation displacement of the skin. The local impact test results are shown in the following table.

[0061]

[0062] In the test, when subjected to local impact, the flat skin, as well as the skin with triangular, wavy and trapezoidal dimples, all rebounded from the impact. Compared with Example 1, Examples 1, 5 and 9, and compared with Example 4, Examples 4, 8 and 12, the maximum deformation and final deformation of the skin with triangular, wavy and trapezoidal dimples are better than those of the flat skin with the same thickness, reflecting the enhanced anti-deformation ability under local impact.

[0063] When subjected to local impact, the skin with a rectangular micro-dimple shape has a relatively large deformation space due to its obvious folding characteristics, so there is no impact rebound. By comparing Example 1 with Comparative Example 1, the maximum deformation of the skin with a rectangular micro-dimple shape exceeds the maximum deformation of the flat plate process, but as the plate thickness increases, the gap between the final deformation of the flat plate gradually narrows. When the thickness reaches about 0.8 mm, as in Example 16 compared with Comparative Example 4, the final deformation is already less than the flat plate skin of the same thickness, that is, when the thickness is relatively thick, the skin with a rectangular micro-dimple shape shows an enhanced ability to resist deformation under local impact.

[0064] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

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

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

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

5. The anti-deformation composite plate for carriages according to claim 1, characterized in that: The spacing between adjacent micro-dimples is 10 to 60 mm.

6. The anti-deformation composite panel for carriages 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 plate 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.

Images