KR100799299B1 - Honeycomb Sandwich Panel - Google Patents

Abstract

The present invention discloses a honeycomb sandwich panel.

In the honeycomb sandwich panel of the present invention, the first sheet and the second sheet each having a continuous pattern cross section are laminated in a staggered form, and then the contact portions of the first sheet and the second sheet are joined to each other to form a polygonal space. A honeycomb core having a molding cell, a surface material provided in a form covering the upper and lower surfaces of the honeycomb core, and a surface provided on the honeycomb core side to increase the contact area with the surface material to increase the strength at the time of joining. It comprises a contact means.

The honeycomb sandwich panel configured as described above enables spot welding, which is an economical and high-strength bonding method, by increasing the contact area between the honeycomb core and the surface material. Therefore, the bonding strength between the honeycomb core and the surface material can be significantly improved compared to the past, which can not only increase the structural rigidity against vibration and temperature environmental conditions but also improve the reliability of the product. To provide.

Honeycomb, core, panel, sandwich panel

Description

Honeycomb Sandwich Panel

1 is a schematic diagram for explaining the manufacturing method of the expansion used in the manufacture of the honeycomb core according to the prior art,

Figure 2 is a schematic diagram for explaining a method of manufacturing a coagulation used in the manufacture of honeycomb core according to the prior art,

3 is a perspective view showing a honeycomb core in a honeycomb sandwich panel according to an embodiment of the present invention;

4 and 5 are cross-sectional views for explaining the bonding structure of the first sheet and the second sheet in the honeycomb core according to an embodiment of the present invention,

Figure 6 is a partially cutaway perspective view of a honeycomb sandwich panel according to an embodiment of the present invention,

7 is a perspective view showing a honeycomb core in a honeycomb sandwich panel according to another embodiment of the present invention;

Figure 8 is a partially cutaway perspective view showing a honeycomb sandwich panel according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: honeycomb sandwich panel 10: honeycomb core

11: first sheet 13: second sheet

20: surface material 30: surface contact means

31: contact piece 35: rod

b: molding cell

The present invention relates to a honeycomb sandwich panel, and more particularly, to a honeycomb sandwich panel in which the mechanical support strength is greatly improved by increasing the bonding area between the core and the surface material.

In general, a honeycomb sandwich panel is composed of a surface material on the upper and lower surfaces of a honeycomb-shaped structure in which a core of polygonal pillars is gathered inside. As it disperses, it not only has high support stiffness against external force, but also has excellent thermal conductivity blocking rate due to gas space in the core, so it is excellent in insulation and light weight, and thus it is widely used for various uses throughout the industry including building materials.

In the honeycomb sandwich panel, the honeycomb core may be manufactured to have various types of cross sections according to desired characteristics, but honeycomb cores in the form of hexagonal cells which are economical and stable are commonly used.

On the other hand, the hexagonal cell honeycomb core manufacturing method includes an expansion (expansion) manufacturing method, a corrugation manufacturing method, and molding or extrusion.

1 is a perspective view illustrating a method of manufacturing an expansion. Referring to this, first, the adhesive 110 is applied to a predetermined portion of the sheet 10 having a predetermined size, and the portions coated with the adhesive 110 of the plurality of sheets are stacked in a zigzag position, and then the stacked sheet bodies are fixed in size. When the tensile strength of the adhesive 110 is applied to the sheet 100 is attached to the sheets 100, the adhesive 110 is not applied to the portion of the sheet and the sheet is spaced apart to form a honeycomb honeycomb core, the core of the The honeycomb panel is completed by attaching surface materials to the upper and lower surfaces.

In addition, FIG. 2 is a conceptual diagram illustrating a method of manufacturing a coagulation. Referring to this, after passing through the sheet 210 between the coagulation rolls 200 to form a coagulation in the sheet 210, the sheet 210 is formed. By laminating and applying an adhesive to the contact portion to bond to form a honeycomb core. The honeycomb sandwich panel is completed by attaching a surface material to the upper and lower sides of the core. Finally, although not shown, a honeycomb body manufacturing method by molding and extrusion is manufactured by directly molding or extruding a honeycomb core, and then a honeycomb sandwich panel is manufactured by attaching a surface material.

On the other hand, the honeycomb core thus prepared not only makes foaming (creating various shapes through bending, etc.) difficult but also generates an anticlass curve that generates residual stress, which is the case of hexagonal cell honeycomb cores. Since the upper and lower surfaces of the cell are bonded to the surfaces of other cells, when one side of the core is bent, the bending force is sequentially displaced to each of the adhesive surfaces of the cells, thereby affecting the other side. At this time, each side of the cell located on the other side is composed of one straight line, so there is no tension margin to accommodate the displaced bending force. Losing an anticlassic curve will occur.

In order to improve such a problem, an improved 'honeycomb core, honeycomb core mold and honeycomb core manufacturing method' has been proposed through patent registration No. 599943. According to this, the first sheet having the continuous cross-sectional shape and the second sheet having the continuous cross-sectional shape are sequentially stacked, and then the contact portions of the first sheet and the second sheet are joined to each other to form a star-shaped forming cell and its outer peripheral portion. The six hexagonal cells are arrange | positioned, and the honeycomb core of the lattice structure in which the shaping cell is arrange | positioned again at the outer peripheral part of this hexagonal cell is disclosed. The honeycomb sandwich panel is formed by joining a plate-like surface material to the upper and lower sides of the honeycomb core.

In this case, the honeycomb sandwich panel that requires high rigidity in order to be used as the exterior wall finishing material of the building, the honeycomb core is made of a lightweight metal such as aluminum and the surface material is provided by a metal plate such as stainless, In joining them, soldering, which is a kind of welding that guarantees a relatively good bonding strength compared to an adhesive, is used, ie, a brazing method of joining using a metal having a lower melting point than a base material.

However, the conventional honeycomb sandwich panel is performed by soldering in bonding the honeycomb core and the upper and lower surface materials, and thus has poor workability due to poor soldering yield and also has an economic disadvantage.

In order to improve this, the spot welding was carried out economically and mass production was possible. However, since the honeycomb core and the surface material are point-contacted in the line contact state, the bonding strength is very low, and as a result, the honeycomb core and the surface material are separated from each other. It caused a problem that peeling phenomenon occurs.

The present invention has been made to solve the above problems, to provide a honeycomb sandwich panel that can increase the bonding area between the honeycomb core and the surface material to ensure improved bonding strength while enabling economic spot welding. There is a purpose.

Honeycomb sandwich panel according to the present invention for achieving the above object, the first sheet and the second sheet having a cross-sectional pattern of a continuous pattern, respectively laminated in a staggered form after the contact between the first sheet and the second sheet The surface area provided in the form which covers the upper and lower surfaces of the honeycomb core by which the shaping | molding cell which is a polygonal space part is provided by joining a site | part, and the contact area with the surface material provided in the said honeycomb core side It is characterized in that it comprises a surface contact means for increasing the strength at the time of bonding.

As a preferable feature of the present invention, the surface contact means is integrally provided with a contact piece of a flat plate bent at right angles to the longitudinal direction of the core on the honeycomb core and in surface contact with the surface material.

As another preferable feature of the present invention, the honeycomb core and the surface material are machined from a metal material, and these are integrally formed by joining the contact piece portion and one end of the surface material in surface contact therewith by spot welding.

As another preferable feature of the present invention, the contact pieces constituting the surface contact means are integrally formed in any one of the first sheet and the second sheet which are bonded to each other to form a star-shaped forming cell.

In another preferred aspect of the present invention, the surface contact means is a rod fitted to the molding cell to close the molding cell, and the upper and lower surfaces thereof are in surface contact with the surface material, and the honeycomb core and the rod at this time are made of a metal material. They are provided, and these are what is integrally formed by joining by spot welding.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Hereinafter, a preferred embodiment of a honeycomb sandwich panel according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a perspective view showing a honeycomb core in a honeycomb sandwich panel according to an embodiment of the present invention, Figures 4 and 5 are selective to any one of the sheet and the first sheet constituting the honeycomb core It is sectional drawing for demonstrating the structure in which the contact piece was integrally formed.

6 is a partially cutaway perspective view illustrating a sandwich panel in which a honeycomb core and a surface material are bonded according to an embodiment of the present invention.

As shown in the present invention, the honeycomb sandwich panel according to the present invention includes a honeycomb core 10 in which a polygonal forming cell b is formed in succession to form a predetermined continuous cross-sectional pattern, and the honeycomb core ( The surface member 20 bonded to the upper and lower surfaces of 10) and the surface contact means 30 for increasing the mutual bonding strength of the honeycomb core 10 and the surface member 20.

The honeycomb core 10 is a configuration in which the first sheet 11 and the second sheet 13 having a predetermined continuous cross-sectional pattern are sequentially stacked in a staggered form, wherein the first sheet 11 and the second sheet are stacked. The sheets 13 are joined to each other by adhesive or welding.

In the honeycomb core 10 having such a configuration, the first cell 11 and the second sheet 13 are bonded to each other to form a forming cell b, which is a polygonal space part, and the forming cell b is The shape of the first sheet 11 and the second sheet 13 may vary depending on the cross-sectional pattern.

) 형상의 단면으로 마련되고, 상기 제2시트(13)는 (

)형상의 단면으로 마련되며, 이들이 상호 접합되는 것에 의해 별과 육각형상의 성형셀(b)이 연속적으로 배치된다. 이러한 제1시트(11)와 제2시트(13)에 의해 제조되는 하니콤 코아(10)는 공지의 기술에 의해 실시되므로 상세한 설명은 생략한다. 다만, 본 발명에서의 하니콤 코아(10)는 고강도를 보장 할 수 있도록 금속판재를 압연, 압출, 인발 등 통상의 공지된 공정을 통해 성형되며, 더욱 바람직하게는 경량의 알루미늄 판재를 프레스 금형으로 가공 성형한 것이다.That is, in the present invention, the first sheet 11 is continuous (

) Is provided in a cross-sectional shape, and the second sheet 13 is (

) Is provided in a cross-sectional shape, and the star and hexagonal forming cells b are continuously arranged by joining each other. Since the honeycomb core 10 manufactured by the first sheet 11 and the second sheet 13 is implemented by a known technique, detailed description thereof will be omitted. However, the honeycomb core 10 in the present invention is formed through a conventional known process such as rolling, extrusion, drawing, so as to ensure a high strength, more preferably a lightweight aluminum sheet to a press mold It is work molding.

The honeycomb core 10 having such a structure forms a sandwich panel by joining the plate-like surface material 20 to upper and lower surfaces thereof.

The surface material 20 is provided with a metal alloy material having a predetermined thickness, and it is proposed that the surface material 20 is preferably made of stainless steel having excellent workability, weldability, mechanical properties, and the like and good corrosion resistance.

The surface material 20 is integrally joined by spot welding in a state of being in close contact with the upper and lower outer surfaces of the honeycomb core 10 described above. Here, since spot welding is a well-known technique, detailed description about a welding method using the same is omitted.

The surface contact means 30 is provided on the honeycomb core 10 side to increase the contact area between the honeycomb core 10 and the surface material 20 to increase the bonding strength. It is achieved by having a contact piece 31 disposed at right angles to one side of the inlet face of the forming cell b of the comb core 10.

That is, the contact piece 31 forming the surface contact means 30 is a member having a flat plate shape having a predetermined height, and the contact piece 31 constitutes the first sheet constituting the honeycomb core 10. (11) or the second sheet 13 is formed by integrally formed and then bent at a right angle by a bending machine or the like.

The contact pieces 31 are provided in the same plane with respect to the inlet surface of the forming cell b, and the contact pieces 31 when the surface material 20 is disposed on the upper and lower surfaces of the honeycomb core 10. One surface of) makes a surface contact with one surface of the surface material 20. In such a state, when spot welding is performed on the surface contacted portion, the honeycomb core 10 and the surface material 20 are maintained at a high bonding strength.

Referring to the manufacturing process of the honeycomb sandwich panel according to an embodiment of the present invention configured as described above are as follows.

First, when the first sheet 11 and the second sheet 13 each having a continuous cross-sectional shape of a predetermined shape are laminated in a staggered form, and the contact portions are welded together, hexagonal and star shaped cells are continuously repeated. The honeycomb core 10 is provided.

At this time, since the contact piece 31 is formed in any one of the first sheet 11 and the second sheet 13 to protrude, it is perpendicular to the inlet surface of the forming cell (b) Bend molding.

Subsequently, when the top and bottom surfaces of the honeycomb core 10 are provided with a surface material 20 made of a metal plate such as stainless steel, the contact piece 31 and the surface material 20 of the honeycomb core 10 are Surface contact is achieved.

In such a state, when spot welding is performed on the contact portion of the surface material 20 which is in surface contact with the contact piece 31, the honeycomb core 10 and the surface material 20 are joined with high bonding strength.

On the other hand, the honeycomb sandwich panel of the present embodiment may be processed in the form of a tube as well as a panel panel. Although not illustrated briefly, the first surface material in the form of a tube formed into a cylindrical shape of a plate-like surface material is prepared, and can be wound on the outer circumferential surface of the primary surface material in a state in which a honeycomb core and a flat surface material are laminated. The tube-shaped panel can be completed by performing spot welding on the contact pieces provided integrally on the upper and lower sides of the honeycomb core 10 while bending.

Figure 7 is a perspective view showing a honeycomb core in a honeycomb sandwich panel according to another embodiment of the present invention, Figure 8 is a partially cutaway perspective view showing a honeycomb sandwich panel according to another embodiment of the present invention.

As shown therein, the honeycomb sandwich panel in this embodiment is similar to the basic shape and structure of the honeycomb core 10 and the surface material 20 in the above-described embodiment, except that the surface contact means ( As the rod 30, a rod 35 fitted to the shaping cell b is proposed.

That is, in the honeycomb sandwich panel according to another embodiment of the present invention, the surface contact means 30 is a rod 35 made of a metal having a shape and size corresponding to the forming cell b of the honeycomb core 10. Is provided.

The rod 35 closes the shaping cell b by being fitted into the shaping cell b, and the rod 35 in the closed state has upper and lower shaping cells b. It is provided to be flush with the entrance surface of the.

Therefore, when the surface material 20 is disposed on the upper and lower surfaces of the honeycomb core 10, the upper and lower surfaces of the rod 35 make surface contact with the surface material 20, and spot welding is performed in such a state. As a result, the rod 35 and the surface material 20 are maintained in a state of being bonded at high bonding strength.

Referring to the manufacturing process of the honeycomb sandwich panel according to another embodiment of the present invention configured as described above are as follows.

First, as in the embodiment described above, a honeycomb core 10 having a polygonal shaping cell b is repeatedly and continuously formed, and in any one of the shaping cells b of the honeycomb core 10. The rod 35 of metal is fitted to fit. At this time, the rod 35 should be provided with a size such that the upper and lower surfaces are flush with the inlet surface of the forming cell (b).

Subsequently, when the top and bottom surfaces of the honeycomb core 10 are provided with a surface material 20 made of a metal plate such as stainless steel, the rod 35 accommodated in the forming cell b of the honeycomb core 10 may be formed. Upper and lower surfaces are in surface contact with the surface material 20.

In such a state, when spot welding is performed on the portion of the surface material 20 which is in surface contact with the upper and lower surfaces of the rod 35, the rod 35 and the surface material 20 are bonded to each other at a high bonding strength. The honeycomb core 10 provided with the rod 35 in the forming cell b also maintains a high bonding force with the surface material 20.

On the other hand, the present invention is not limited to the described embodiments, it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

The honeycomb sandwich panel constructed and operated as described above can increase the contact area between the honeycomb core and the surface material, thereby enabling spot welding, which is an economical and high-strength bonding method.

Therefore, the bonding strength between the honeycomb core and the surface material can be significantly improved compared to the past, which can not only increase the structural rigidity against vibration and temperature environmental conditions but also improve the reliability of the product. To provide.

Claims (6)

The first sheet and the second sheet, each having a continuous pattern of cross sections, are stacked in a mutually staggered form, and then the contact portions of the first sheet and the second sheet are joined to each other to form a metal material in which a molding cell, which is a polygonal space part, is provided. Comb cores; A surface material made of a metal material provided to cover the upper and lower surfaces of the honeycomb core; It is provided on the honeycomb core side and includes a surface contact means for increasing the bonding strength during spot welding by increasing the contact area with the surface material, The surface contact means is a honeycomb sandwich panel, characterized in that the upper and lower surfaces of the honeycomb core is integrally provided with a contact piece of a flat plate bent at right angles to the longitudinal direction of the core to the surface material. delete delete The honeycomb sandwich panel according to claim 1, wherein the contact pieces are integrally formed with any one of the first sheet and the second sheet which are bonded to each other to form a star and hexagonal shaped cells repeatedly. 2. The surface contact means according to claim 1, further comprising a rod made of a metal material fitted to the molding cell to close the molding cell, the upper and lower surfaces of which are joined by spot welding while being in surface contact with the surface material. Honeycomb sandwich panel, characterized in that. delete

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