CN117465075A - Folded paper composite sandwich board structure and manufacturing method - Google Patents

Abstract

The invention relates to the technical field of composite materials, in particular to a paper folding composite sandwich plate structure and a manufacturing method, wherein the paper folding composite sandwich plate structure comprises a plurality of unit cells, each unit cell comprises an upper bottom plate and a lower bottom plate which are arranged in parallel at intervals, a core layer is arranged between the upper bottom plate and the lower bottom plate, first accommodating cavities are respectively formed in the peripheral side surfaces of the core layer, the core layer is respectively connected with the upper bottom plate and the lower bottom plate, a first supporting body can be filled in the first accommodating cavities, and a plurality of unit cells can be connected to form a whole paper folding composite sandwich plate. The vehicle part and the additional part manufactured by adopting the folded paper composite sandwich plate structure can meet the requirement of light weight and simultaneously have high strength and high rigidity.

Description

Folded paper composite sandwich board structure and manufacturing method

Technical Field

The invention relates to the technical field of composite materials, in particular to a paper folding composite sandwich plate structure and a manufacturing method.

Background

With the development of the automobile industry, more and more automobiles enter the production and living fields. Under the current energy-saving and emission-reducing background, the light-weight design trend of the automobile parts and the added parts is not satisfied, the use of energy sources can be effectively reduced by light weight, and the fuel efficiency can be improved by 6 to 8 percent and the maneuverability of the automobile is obviously enhanced when the weight is reduced by 10 percent. Meanwhile, in view of safety performance, the functions of dynamic energy absorption, impact resistance, bulletproof, explosion prevention and the like of the automobile parts and the added parts are important attention in the current application. The existing automobile parts and add the material of installing the piece and adopt steel sheet or alloy plate generally, can't guarantee the light-weighted while effectively, have high strength and high rigidity concurrently.

Accordingly, there is a need for a folded paper composite sandwich panel structure and method of manufacture that addresses the above-described problems.

Disclosure of Invention

The invention aims to provide a paper folding composite sandwich plate structure and a manufacturing method thereof, and vehicle parts and additional parts manufactured by the paper folding composite sandwich plate structure can meet the requirement of light weight and simultaneously have high strength and high rigidity.

To achieve the purpose, the invention adopts the following technical scheme:

a folded paper composite sandwich panel structure comprising: the unit cell comprises a plurality of unit cell bodies, wherein the unit cell bodies comprise an upper bottom plate and a lower bottom plate which are arranged at intervals in parallel, a core layer is arranged between the upper bottom plate and the lower bottom plate, first accommodating cavities are formed in the peripheral side faces of the core layer, the core layer is respectively connected with the upper bottom plate and the lower bottom plate, first supporting bodies can be filled in the first accommodating cavities, and the unit cell bodies can be connected to form a whole paper folding composite sandwich plate.

Further, the core layer comprises two core plates, the peripheral edges of the core plates are in a shape of a Chinese character 'ji', the middle part of the core plate is provided with a middle protruding plane, the peripheral corners of the core plate are provided with corner protruding planes, grooves are formed between the adjacent corner protruding planes, and the two core plates are symmetrically connected to form the core layer with the first accommodating cavity at the periphery and the two second accommodating cavities at the middle part.

Further, a second supporting body is filled in the second accommodating cavity of the core layer.

Further, the unit cell is projected as a square from the upper base plate to the lower base plate.

Further, the length and the width of the unit cell are the same, the length of the unit cell is 10mm-35mm, and the height of the unit cell is 6.0mm-8.5mm.

Further, the depth of the groove is 1.5mm-5.0mm.

Further, the angle of inclination of the corner projection plane of the core plate and the transitional inclined wall surface of the groove is 30-55 degrees.

Further, the transition inclined wall surface is in arc transition with the corner convex plane, and the radius of the transition arc is 0.8mm-3.0mm.

Further, the core layer, the upper bottom plate and the lower bottom plate are glued or welded.

The manufacturing method is used for manufacturing the folded paper composite sandwich plate structure, and comprises the following steps of:

s1, blanking an upper bottom plate, a lower bottom plate and a raw material plate forming a core layer, stamping the raw material plate to form a core plate, and symmetrically connecting two core plates to form the core layer;

s2, manufacturing a first support body, and filling the first support body into a first accommodating cavity of the core layer;

s3, connecting the core layer with the upper bottom plate and the lower bottom plate to form a unit cell;

and S4, splicing a plurality of the single bodies, and then adopting vacuum diffusion welding to form the folded paper composite sandwich plate structure.

The invention has the beneficial effects that:

the invention provides a paper folding composite sandwich plate structure, which comprises a plurality of unit cells, wherein each unit cell comprises an upper bottom plate and a lower bottom plate which are arranged in parallel at intervals, a core layer is arranged between the upper bottom plate and the lower bottom plate, first accommodating cavities are respectively formed in the peripheral side surfaces of the core layer, the core layer is respectively connected with the upper bottom plate and the lower bottom plate, first supporting bodies can be filled in the first accommodating cavities, and then the plurality of unit cells can be connected to form a whole paper folding composite sandwich plate. In the use process, the first supporting body can be filled or not filled according to the requirement, and the material and the performance of the first supporting body can be selected according to the actual requirement. Through adopting above-mentioned structure, the automobile-used part and the additional piece of adopting paper folding compound sandwich plate structure to make can satisfy the lightweight simultaneously, pack first supporter as required to make automobile-used part and additional piece have high strength and high rigidity concurrently, can also make automobile-used part and additional piece have functions such as shock resistance energy-absorbing, damping, sound insulation, bulletproof explosion-proof through selecting material and the performance of first supporter moreover.

The manufacturing method provided by the invention is used for manufacturing the paper folding composite sandwich plate structure, the vehicle part and the additional member manufactured by adopting the paper folding composite sandwich plate structure can be light and simultaneously be filled with the first support body according to the requirement, so that the vehicle part and the additional member have high strength and high rigidity, and the vehicle part and the additional member can have the functions of shock resistance, energy absorption, vibration reduction, sound insulation, bulletproof, explosion prevention and the like by selecting the materials and the performances of the first support body.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a unit cell in a folded paper composite sandwich structure of the present invention;

FIG. 2 is a schematic illustration of a core panel of a folded paper composite sandwich panel structure of the present invention;

FIG. 3 is a schematic illustration of a core layer in a folded paper composite sandwich panel structure of the present invention;

fig. 4 is a flow chart of a method of manufacture of the present invention.

In the figure:

10. an upper base plate; 11. a lower base plate; 12. a core layer; 121. a middle bulge plane; 122. corner convex plane; 123. a groove; 124. a transitional inclined wall surface; 125. a second accommodation chamber; 126. a first accommodation chamber.

Detailed Description

Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings.

In this application, the terms "comprises," "comprising," "has," "having," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the present application, the term "and/or" is an association relationship describing an association object, meaning that three relationships may exist. For example, a folded paper composite sandwich structure and/or a folded paper composite sandwich structure may represent: the paper folding composite sandwich plate structure and the paper folding composite sandwich plate structure exist independently, and the three conditions of the paper folding composite sandwich plate structure and the paper folding composite sandwich plate structure exist independently. In addition, the character "/" in this application generally indicates that the front-rear association object is an "and/or" relationship.

The terms "connected," "coupled," and "mounted" are used herein to describe either a direct connection, a coupling, or an installation, or an indirect connection, a coupling, or an installation. By way of example, two parts or components are connected together without intermediate members, and by indirect connection is meant that the two parts or components are respectively connected to at least one intermediate member, through which the two parts or components are connected. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings, and may include electrical connections or couplings.

In this application, one of ordinary skill in the art will understand that relative terms (e.g., "about," "approximately," "substantially," etc.) used in connection with quantities or conditions are intended to include the values and have the meanings indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a particular value, the tolerance associated with a particular value resulting from manufacture, assembly, use, and the like. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to the addition or subtraction of a percentage (e.g., 1%,5%,10% or more) of the indicated value. Numerical values, not employing relative terms, should also be construed as having specific values of tolerance. Further, "substantially" when referring to relative angular positional relationships (e.g., substantially parallel, substantially perpendicular) may refer to adding or subtracting a degree (e.g., 1 degree, 5 degrees, 10 degrees, or more) from the indicated angle.

In this application, one of ordinary skill in the art will understand that a function performed by a component may be performed by one component, multiple components, a part, or multiple parts. Also, the functions performed by the elements may be performed by one element, by an assembly, or by a combination of elements.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", and the like are described in terms of orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements. It should also be understood that the terms upper, lower, left, right, front, back, etc. are not only intended to represent positive orientations, but also to be construed as lateral orientations. For example, the lower side may include a right lower side, a left lower side, a right lower side, a front lower side, a rear lower side, and the like.

When the automobile parts and the additional parts are manufactured, the folded paper composite sandwich plate structure is provided in the invention, so that the light weight design is realized and the energy saving effect is achieved in order to realize the light weight and the high strength at the same time, and as shown in fig. 1-3. The paper folding composite sandwich plate structure comprises a plurality of unit cell bodies, each unit cell body comprises an upper bottom plate 10 and a lower bottom plate 11 which are arranged at intervals in parallel, a core layer 12 is arranged between the upper bottom plate 10 and the lower bottom plate 11, first accommodating cavities 126 are respectively formed in the side faces of the periphery of the core layer 12, the core layer 12 is respectively connected with the upper bottom plate 10 and the lower bottom plate 11, first supporting bodies can be filled in the first accommodating cavities 126, and the plurality of unit cell bodies can be connected to form a whole paper folding composite sandwich plate. The upper base plate 10, the lower base plate 11 and the core layer 12 are made of 5-series or 6-series aluminum alloy materials.

In the use process, the first accommodating cavity 126 can be filled with the first supporting body or not filled with the first supporting body according to the requirement, and the material and the performance of the first supporting body can be selected according to the actual requirement. Through adopting above-mentioned structure, the automobile-used part and the additional piece of adopting paper folding compound sandwich plate structure to make can satisfy the lightweight simultaneously, pack first supporter as required to make automobile-used part and additional piece have high strength and high rigidity concurrently, can also make automobile-used part and additional piece have functions such as shock resistance energy-absorbing, damping, sound insulation, bulletproof explosion-proof through selecting material and the performance of first supporter moreover.

Further, in the process of splicing the plurality of unit cell bodies, the core layers 12 of the plurality of unit cell bodies can be spliced, and then the integral plate spliced by the upper base plate 10 and the integral plate spliced by the lower base plate 11 can be directly connected with the spliced core layers 12. For easy installation, the plurality of upper base plates 10 are of an integrated structure, and the plurality of lower base plates 11 are of an integrated structure.

Further, the core layer 12 includes two core plates, the peripheral edges of the core plates are shaped like a Chinese character 'ji', the middle part of the core plate is provided with a middle part convex plane 121, the peripheral corners of the core plates are provided with corner convex planes 122, a groove 123 is formed between the adjacent corner convex planes 122, and the two core plates are symmetrically connected to form the core layer 12 with the first accommodating cavity 126 at the periphery and the two second accommodating cavities 125 at the middle part. Specifically, the core plate may be manufactured through a stamping process, and by designing the core plate to have the above-described structure, the first and second accommodation chambers 126 and 125 can be formed while securing the strength of the core layer 12, thereby realizing a lightweight design.

Further, the second accommodating chamber 125 of the core layer 12 is filled with a second support. Specifically, the material and properties of the second support may be the same as or different from those of the first support, and the first support or the second support may be selectively filled, or neither the first support nor the second support may be filled, which is not limited herein. Through the arrangement, the second supporting body filled in the second accommodating cavity 125 is utilized to play a supporting role on one hand, and on the other hand, the performance of the folded paper composite sandwich plate structure can be improved according to the requirement.

Further, the unit cell is projected as a square from the upper plate 10 toward the lower plate 11. The square design of the unit cell bodies facilitates the splicing of a plurality of unit cell bodies to form a paper folding composite sandwich plate structure with larger volume. In other embodiments, rectangular, regular hexagonal, etc. forms may be used, and are not limited thereto.

Further, the length and the width of the unit cell are the same, the length of the unit cell is 10mm-35mm, and the height of the unit cell is 6.0mm-8.5mm. By limiting the size of the unit cell, the unit cell is ensured to meet the light-weight design, and meanwhile, the occupied space is smaller, so that the vehicle parts and the additional parts are prevented from occupying too much space when being built.

Further, the depth of the groove 123 is 1.5mm to 5.0mm. By defining the height of the core plate, the manufacturing is facilitated, and at the same time, tearing of the core plate in the stamping process is avoided.

Further, the corner projection plane 122 of the core plate is inclined at an angle of 30 ° -55 ° to the transition inclined wall surface 124 of the recess 123. Through the arrangement, stamping is convenient, and after stamping, the stamping head of the stamping machine is convenient to separate from the core plate. Also, the greater the angle of inclination of the corner projection plane 122 of the core plate with the transition inclined wall surface 124 of the groove 123, the deeper the depth of the groove 123 at the same size, the smaller the area of the core plate accordingly. In the process of processing the core plate, the inclination angle of the transition inclined wall surface 124 of the corner convex plane 122 and the groove 123 of the core plate is determined according to actual needs, and is not limited in any way.

Further, the transition inclined wall surface 124 is in arc transition with the corner convex plane 122, and the radius of the transition arc is 0.8mm-3.0mm. Specifically, the transition inclined wall surface 124 and the bottom surface of the groove 123 are also in arc transition. By employing the arc transition, the stamping fabrication is facilitated while avoiding stress concentrations at the corners, thereby ensuring the quality of the fabricated core layer 12.

Further, the core layer 12 is glued or welded to the upper plate 10 and the lower plate 11. Through adopting above-mentioned connected mode, can carry out the installation of upper plate 10 and lower plate 11 again after having filled first supporter and second supporter as required to when guaranteeing that first supporter and second supporter are filled, can closely laminate sandwich layer 12 and not have the hole, satisfy the demand of densely packing.

The paper folding composite sandwich plate structure adopts small-size single bodies to form a large-size paper folding composite sandwich plate structure in a lap joint and splicing mode, and products with different sizes are brought by the same design thought. Therefore, the cost of multiple mold opening caused by the requirement of the paper folding composite sandwich plate structure with different sizes in the process flow is saved; the first accommodating cavity 126 and the second accommodating cavity 125 can be filled with materials with different characteristics, so that an energy absorbing body meeting the requirements of multi-condition impact energy absorption, bulletproof and explosion-proof is created, and the multi-functional characteristics of the folded paper composite sandwich plate structure are met. The technical problems that the existing composite material is difficult to meet the requirements of multiple times of die sinking and forming in the process of adjusting parameter sizes at the same time are solved.

As shown in fig. 4, the present embodiment further provides a manufacturing method for manufacturing the folded paper composite sandwich panel structure, which includes the following steps:

s1, blanking an upper base plate 10, a lower base plate 11 and raw material plates forming a core layer 12, punching the raw material plates to form core plates, and symmetrically connecting the two core plates to form the core layer 12;

s2, manufacturing a first support body, and filling the first support body into the first accommodating cavity 126 of the core layer 12;

s3, connecting the core layer 12 with the upper base plate 10 and the lower base plate 11 to form a unit cell;

and S4, splicing a plurality of single bodies, and then adopting vacuum diffusion welding to form the folded paper composite sandwich plate structure.

Specifically, the structural form of the core layer 12 may be utilized to form a closed foaming container, the size of the foaming container needs to be equal to that of the core layer 12, foaming of the foam metal can be performed in the foaming container, because of viscosity and capillary action of liquid in the molten foaming process, the foam metal (including but not limited to aluminum foam and copper foam) obtained after foaming and cooling can be closely attached to the first accommodating cavity 126 and the second accommodating cavity 125 without pores, and then the folded paper composite sandwich plate structure is obtained by welding or gluing, so that the effect of the multifunctional composite material is satisfied. This step solves the problem that the filling material cannot be tightly attached to the core layer 12 due to curvature of the wall of the core layer 12 when the material is filled after molding, so that the need of compact filling cannot be met due to the free space. In other embodiments, the core layer 12 may be connected according to actual needs, and then be placed as a mold into a foaming container for filling, and the liquid foam is tightly attached to the curve of the core layer mold due to the large liquid flexibility in the foaming process, so that the foam and the core layer 12 can be tightly attached after cooling, and the redundant parts of the first accommodating cavity 126 and the second accommodating cavity 125 can be cut and trimmed after filling. And different unit cells can be filled with materials with different performance densities, so that the actual use requirements are better met.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (10)

1. The paper folding composite sandwich board structure is characterized by comprising: the utility model provides a polylith unit cell body, the unit cell body includes upper plate (10) and lower plate (11) that parallel interval set up, in upper plate (10) with be provided with sandwich layer (12) between lower plate (11), sandwich layer (12) all have first holding chamber (126) around the side, sandwich layer (12) respectively with upper plate (10) and lower plate (11) are connected, can fill first supporter in first holding chamber (126), the polylith unit cell body can be connected and form the compound sandwich panel of monoblock paper folding.

2. The paper folding composite sandwich board structure according to claim 1, wherein the core layer (12) comprises two core boards, the peripheral edges of the core boards are in a shape of a Chinese character 'ji', the middle part of the core boards is provided with a middle protruding plane (121), the peripheral corners of the core boards are provided with corner protruding planes (122), grooves (123) are formed between the adjacent corner protruding planes (122), and the two core boards are symmetrically connected to form the core layer (12) with the first accommodating cavity (126) at the periphery and the two second accommodating cavities (125) at the middle part.

3. The folded paper composite sandwich panel structure according to claim 2, characterized in that the second receiving cavity (125) of the core layer (12) is filled with a second support body.

4. The folded paper composite sandwich panel structure according to claim 1, characterized in that the unit cell is projected as a square from the upper base plate (10) in the direction of the lower base plate (11).

5. The paper folding composite sandwich board structure according to claim 1, wherein the lengths and the widths of the unit cells are the same, the lengths of the unit cells are 10mm-35mm, and the heights of the unit cells are 6.0mm-8.5mm.

6. The folded paper composite sandwich panel structure of claim 2, wherein the depth of the grooves (123) is 1.5mm-5.0mm.

7. The folded paper composite sandwich panel structure of claim 2 wherein the corner projection plane (122) of the core panel is inclined at an angle of 30 ° -55 ° to the transition inclined wall surface (124) of the groove (123).

8. The folded paper composite sandwich panel structure of claim 7, wherein the transition sloped wall surface (124) transitions with the corner protrusion plane (122) arc and the radius of the transition arc is 0.8mm-3.0mm.

9. The folded paper composite sandwich panel structure according to claim 1, characterized in that the core layer (12) is glued or welded to the upper and lower base plates (10, 11).

10. A method of manufacturing a folded paper composite sandwich panel structure according to any one of claims 1 to 9, comprising the steps of:

s1, blanking an upper bottom plate (10), a lower bottom plate (11) and raw material plates forming a core layer (12), stamping the raw material plates to form a core plate, and symmetrically connecting two core plates to form the core layer (12);

s2, manufacturing a first support body, and filling the first support body into a first accommodating cavity (126) of the core layer (12);

s3, connecting the core layer (12) with the upper bottom plate (10) and the lower bottom plate (11) to form a unit cell;

and S4, splicing a plurality of the single bodies, and then adopting vacuum diffusion welding to form the folded paper composite sandwich plate structure.