JPH11181897A - Sandwich panel and connective structure therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strengthen a connective structure for a sandwich panel and reduce its weight and cost. SOLUTION: A panel structure 2 is formed by soldering integrally a pair of parallel surface plates 1a, 1b which are formed of aluminum members, cores 4 placed between the surface plates 1, 1 and a frame member 5 placed between the edges of the surface plates 1, 1. A connecting member 6 having a connecting piece 7 projecting outward is butted against the outer surface of the frame member 5 of the panel structure 2 and the butting portions are joined by friction welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandwich panel and a connecting structure thereof, and more particularly, to a sandwich panel having a connecting portion and a connecting structure between the sandwich panels.

[0002]

2. Description of the Related Art Generally, sandwich panels typified by honeycomb panels and the like are widely used for building materials such as exterior wall materials and roofing materials of buildings because of their high corrosion resistance and light weight. As shown in FIGS. 7 and 8, this sandwich panel includes a pair of surface plates a parallel to each other.
A frame member c or a frame member i is interposed between the sides of the surface plate a, and then the panel body P is formed by brazing.

As a connecting structure for connecting the sandwich panels, for example, as shown in FIG. 7, connecting pieces d, d provided integrally with frame members c, c, respectively.
And the panel bodies P, P are arranged on the same plane, and the connecting pieces d, d are sandwiched between a pair of connecting plates e, e. A structure for fixing a plurality of, for example, two places is known. As another connection structure, as shown in FIG. 8, for example, as shown in FIG. 8, connection pieces j, j provided by integral processing with frame members i, i are overlapped, and the panel bodies P, P are placed on the same plane. A structure is known in which one or a plurality of, for example, two portions of the connecting pieces j, j are fixed by bolts f and nuts g. In addition, in order to cover the connection part between the panel main bodies P and P from the outside, it is covered with a caulking material h or a joint member (or a decorative member) made of sheet metal.

[0004]

However, since it is necessary to braze the surface plate a, the core material b, and the frame material c or i simultaneously and integrally, the panel body P needs to be brazed to these materials. Only an aluminum material with low or no magnesium content, which is good in terms of fluoride flux and brazing properties, could be used, and an aluminum material with higher strength and a high magnesium content could not be selected as a material. Also, about 600 ° C to braze the whole
Because of exposure to such a high temperature, there is a problem that the strength of the frame members c and i and the connecting pieces d and j integrally attached thereto are reduced. Therefore, the strength of the connection structure between the panel bodies P, P also decreases, so that it is necessary to increase the thickness of the frame members c, i and the connection pieces d, j in anticipation of the reduction in strength during brazing. There has been a problem that the weight and cost of the panel body P increase and the workability decreases. The present invention has been made in view of the above circumstances, and it is possible to prevent a reduction in strength of a connecting piece during brazing, to strengthen a connecting structure between panel bodies, and to reduce the weight and manufacturing cost of the panel body. It is an object of the present invention to provide such a sandwich panel and a connection structure thereof.

[0005]

In order to achieve the above object, a sandwich panel according to claim 1 is provided with a pair of mutually parallel surface plates formed of aluminum members and an intervening space between these surface plates. A panel member formed by integrally brazing a core material to be formed and a frame member interposed between the side portions of the surface plate, and a connecting member having a connecting piece projecting outward. And contacting the contact portion by friction welding.

According to a second aspect of the present invention, in the connecting structure for connecting the sandwich panels according to the first aspect,
The connecting pieces of the connecting members of both sandwich panels to be connected are brought close to each other, the panel bodies are arranged on the same plane, and the connecting pieces are sandwiched by a pair of connecting plates and fixed by a fixing member. It is characterized by that.

In the connection structure for connecting the sandwich panels, it is not always necessary to be as described above, and the connection pieces of the connection members of the two sandwich panels to be connected are superimposed on each other so that both panel bodies are flush with each other. And the overlapping portion of the connecting pieces may be fixed by a fixing member (Claim 3), or the connecting pieces of the connecting members of both sandwich panels to be connected may be overlapped to form both panels. The main body may be disposed on the same plane, and the overlapping portion of the connecting piece may be fixed by friction welding.

According to the present invention, since the frame member of the panel body and the connecting member in the sandwich panel are formed as separate members and further joined by friction welding instead of brazing, the connecting member is exposed to a high temperature. And the strength of the connecting piece can be prevented from lowering. Further, a high-strength magnesium-rich aluminum material other than a low-magnesium content aluminum material that does not contain a good content of a fluoride-based flux and brazing properties can also be used for the connection member, Can be improved.
Therefore, even if the thickness or the size of the frame member or the connecting member is reduced, the same or higher strength can be obtained as before, so that the weight of the frame member and the connecting member can be reduced, and the cost of the material can be reduced. Can be reduced. In addition, since the joint members are joined by friction welding, thermal deformation and the like of the connecting members are reduced as compared with the conventional welding method, and a sandwich panel with a beautiful appearance can be obtained.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional perspective view showing the structure of a panel body 2 in a sandwich panel 1 according to the present invention.
FIG. 2 is a sectional perspective view showing a joint state between the panel body 2 and the connecting member 6 in the sandwich panel 1.

The panel body 2 includes a pair of parallel surface plates 3a and 3b formed in, for example, a rectangular shape, a core member 4 interposed between the surface plates 3a and 3b, and the surface plates 3a and 3b. And the frame member 5 interposed between the sides of the frame.

The surface plates 3a and 3b are formed of an aluminum plate, and the frame member 5 is formed of an aluminum extrusion. The core member 4 is formed by closely arranging a plurality of hollow members having a cylindrical shape made of aluminum. The core member 4 is not necessarily formed in this manner. For example, a hollow member forming a hexagonal cylinder by bonding an aluminum bent plate that has been bent in a trapezoidal wave shape in advance is used as a core member, that is, a honeycomb core. It may be formed of a polygonal cylindrical member other than a hexagon, for example, a pentagon or an octagon.

In order to form the panel main body 2 constructed as described above, for example, one of the surface plates 3a and 3b, the core material 4 and the frame material 5 is made of an aluminum clad material having a brazing material adhered to the surface thereof. Or the surface plate 3
a, 3b, the core material 4, and the frame material 5 without using the aluminum clad material, with the brazing material interposed therebetween.
During the heat treatment, the brazing material is melted and brazed to form a single piece. In this case, the flux is a non-corrosive flux such as KF + AlF3 or KAlF4 + K3AlF6 + K
Using a flux such as 2AlF5.H2O, the surface plate 3a,
3b, the core member 4 and the frame member 5 are preferably joined.

A connecting member 6 having a connecting piece 7 protruding outward is brought into contact with the outer surface of the frame member 5 of the panel main body 2 thus formed, and the contact portion is friction-welded. By joining, the joining portion 8 is formed, and the sandwich panel 1 that can be connected to each other is formed. The position and shape of the connecting piece 7 in the connecting member 6 are shown in FIG.
The configuration is not limited to those described above, and any configuration may be used as long as it can be securely connected.

In addition, friction welding (friction stud)
"Ir welding" is a welding method in which a welded portion is softened and joined by frictional heat. By pressing a rotatable probe 11 to be described later against the welded portion and moving it along the joining direction while rotating at a high speed (for example, 1000 to 5000 rpm), the welded portion is softened by frictional heat with the probe 11, The portion softened by the stirring action by the rotation of the probe 11 and the pushing action in the direction opposite to the moving direction is joined, and the welded portion is welded.

The advantage of the friction welding method as compared with the conventional joining method in which the components of the sandwich panel 1 are integrally and simultaneously brazed is that portions other than the portion to be welded need not be exposed to high temperatures. In addition, the present invention can be applied to an aluminum material having a high magnesium content other than an aluminum material having a low magnesium content, which is excellent in fluoride flux and brazing properties. Therefore, a high-strength aluminum material other than a fluoride flux and an aluminum material having good brazing properties can be used as the material of the connecting member 6, and the connecting piece 7 is not exposed to a high temperature. Can be prevented from decreasing in strength. Thereby, even if the frame member 5 and the connecting member 6 are made smaller than before, the strength of the connecting structure is sufficiently maintained.

As for the welding method of aluminum material, generally, TI is a kind of inert gas arc welding.
G welding (tungsten inert gas ar
cwelding or MIG welding (metal in)
However, in the friction welding method described above, the projections appear less frequently in the welded portion formed by a single welding operation, and the friction welding method is more widely used than in these methods. The possibility of thermal deformation around the weld is also low. Therefore, when the friction welding method is employed, the commercial value can be increased without impairing the appearance of the surface of the sandwich panel 1.

Next, with respect to the friction welding, the step of joining the panel body 2 and the connecting member 6 will be described with reference to FIGS.
The description will be made based on the schematic sectional views shown in the order of (c).

The connecting member 6 is brought into contact with the outer surface of the frame member 5 of the panel body 2, and one side of the contacting portion is contacted by friction welding means 9 such as a probe 11 rotatably attached to a lower portion of a shoulder 10. The probe 11 is pressed and slid on the contact portion while rotating the probe 11 at high speed (for example, 1000 to 5000 rpm) (see FIG. 3A). After the joining portion 8 is formed by friction welding one side of the contact portion in this way, the friction welding means 9 is moved to the other surface to perform the same processing (see FIG. 3B). ), Both sides of the contact portion are friction-welded, and the connecting member 6 and the panel body 2 are welded.
Is completed (see FIG. 3C). The joining step is not necessarily performed in this manner. For example, two friction welding means 9 may be prepared and both sides of the contact portion may be joined simultaneously, or one side may be joined. Then, instead of moving the friction welding means 9, the panel body 2 may be turned over.

Hereinafter, first to third embodiments of the connecting structure for connecting the sandwich panels 1 and 1 in which the connecting members 6 are joined will be described with reference to FIGS.

First Embodiment FIG. 4 is a schematic sectional view showing a first embodiment of a connecting structure for connecting sandwich panels 1 and 1 according to the present invention.

The two sandwich panels 1, 1 formed as described above are arranged on the same plane so that the connecting pieces 7, 7 of the connecting member 6 are close to each other.
Is sandwiched between a pair of connecting plates 12, and both connecting pieces 7, 7 are fixed by fixing members such as bolts 13 and nuts 14.
Then, the connecting plates 12 and 12 are connected and fixed so as to penetrate each. Incidentally, both side concave portions formed in the connecting portion have the same thickness as the above-mentioned surface plates 3a and 3b, for example.
It is covered with decorative boards 16, 16 of similar colors. In this case, the decorative plate 16 is formed to have a substantially hat shape in cross section, and the ends protruding on both sides are fitted and fitted to fitting grooves 17 previously formed near both ends of the connecting member 6. By using the decorative plate 16 in this manner, the appearance of the connected sandwich panels 1 and 1 can be improved, and dust and water droplets can be prevented from accumulating in the concave portion of the connecting portion.

Second Embodiment FIG. 5 shows a sandwich panel 1A, 1A according to the present invention.
It is a schematic sectional drawing which shows 2nd Embodiment of the connection structure which connects mutually.

In the second embodiment, the shape of the connecting member 6 in the first embodiment is changed to a connecting member 6a. Specifically, when the sandwich panels 1A, 1A are arranged on the same plane, The connecting pieces 7a of the connecting members 6a of the sandwich panels 1A, 1A are formed so that the connecting pieces 7a can overlap each other. The overlapping portions of the connecting pieces 7a, 7a thus polymerized are connected and fixed by a fixing member such as a bolt 13 and a nut 14 so as to penetrate. In addition, as shown in FIG.
a, 12a, the bolt 13 and the nut 1
4 and may be fixed. The other parts are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

Third Embodiment FIG. 6 shows a sandwich panel 1A, 1A according to the present invention.
Fig. 6 shows a third embodiment of a connection structure for connecting each other, and (a)
FIG. 3 is a schematic cross-sectional view showing a friction welding process, and FIG.

The third embodiment is a case where the connecting pieces 12a are connected to each other by friction welding.

As in the second embodiment, the connecting member 6
After the connecting pieces 7a, 7a of a, 6a are superimposed, the friction welding means 9 is arranged above the superposed portion. A probe 11 rotatably arranged below the shoulder 10 of the friction welding means 9 is pressed against the connecting piece 7a located above the overlapping portion, and the probe is rotated at high speed (for example, 1000 to 500).
At 0 rpm), the connecting piece 7a is slid on the connecting piece 7a in a direction perpendicular to the protruding direction (see FIG. 6A). In this way, after the joining portion 15 is formed by friction welding on the overlapping portion of the connecting pieces 7a, 7a to complete the connection,
The connecting portions are covered with decorative plates 16, 16 (see FIG. 6B). In this case, as shown in FIG. 6, the decorative plates 16 and 16 may be mounted on the side where the friction welding means 9 is not disposed in the friction welding process as shown in FIG. Alternatively, the decorative plate 16 may not be attached in the friction welding step, and may be attached to both sides after the friction welding is completed. Since the other parts of the third embodiment are the same as those of the first or second embodiment, the same parts are denoted by the same reference numerals and description thereof will be omitted.

The connecting member 6 or 6a according to the present invention
Of course can be applied to panel bodies other than the sandwich panel, and of course, the connection structure can also be applied to panel bodies other than the sandwich panel and other connected bodies. Further, in the above embodiment, the case where the connecting members 6 and 6a are long members has been described. However, the connecting members 6 and 6a are not necessarily required to be long members and may be piece members (short members). .
When the connecting members 6 and 6a are made of piece material (short material), it is necessary to arrange the piece materials to be connected at positions facing each other.

[0029]

According to the present invention, the frame member of the panel body and the connecting member in the sandwich panel are formed as separate members and are joined by friction welding instead of brazing. It is not exposed, and the strength of the connecting piece can be prevented from lowering. In addition, the use of a high-magnesium aluminum material having a high magnesium content other than an aluminum material having a low magnesium content, which is good in terms of a fluoride flux and brazing properties, or an aluminum material that does not contain the same, further enhances the strength. Improvement can be achieved. Therefore, even if the thickness or the size of the frame member or the connecting member is reduced, the same or higher strength can be obtained as before, so that the weight of the frame member and the connecting member can be reduced,
Material costs can be reduced. In addition, since the joint members are joined by friction welding, thermal deformation and the like of the connecting members are reduced as compared with the conventional welding method, and a sandwich panel with a beautiful appearance can be obtained.

[Brief description of the drawings]

FIG. 1 shows a sandwich panel according to the present invention.
It is a sectional perspective view showing the structure of a panel main part.

FIG. 2 shows a sandwich panel according to the present invention.
It is a sectional perspective view showing the joined state of a panel main part and a connecting member.

FIG. 3 shows a sandwich panel according to the present invention.
The steps of joining the panel body and the connecting member include (a) to (c).
It is a schematic sectional view shown step by step in this order.

FIG. 4 is a schematic sectional view showing a first embodiment of a connection structure between sandwich panels according to the present invention.

FIG. 5 is a schematic cross-sectional view showing a second embodiment of the structure for connecting sandwich panels according to the present invention.

FIG. 6 is a schematic cross-sectional view showing a third embodiment of the structure for connecting sandwich panels according to the present invention, wherein (a) shows a process of friction welding and (b) shows a state in which the connection is completed.

FIG. 7 is a schematic sectional view showing a conventional example of a sandwich panel connection structure.

FIG. 8 is a schematic cross-sectional view showing another conventional example of the sandwich panel connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Sandwich panel 2 Panel main body 3a, 3b Surface plate 4 Core material 5 Frame material 6, 6a Connecting member 7, 7a Connecting piece 8 Joining part 9 Friction welding means 11 Probe 12, 12a Connecting plate 13 Bolt (fixing member) 14 Nut (fixing member) 15 Joint

Continued on the front page (72) Inventor Hideaki Endo 2-2-220 Higashishinagawa, Shinagawa-ku, Tokyo Japan Light Metal Co., Ltd. (72) Inventor Hiroshi Yamamoto 20-1 Shimoda-cho, Sakai-shi, Osaka Nippon Light Metal Co., Ltd. Inside the Osaka Factory (72) Inventor Akihiko Yoshimi 2-20 Higashi Shinagawa, Shinagawa-ku, Tokyo Japan Light Metal Co., Ltd.

Claims (4)

[Claims] 1. A pair of mutually parallel surface plates formed of aluminum members, a core material interposed between these surface plates, and a frame material interposed between sides of the surface plates. A connecting member having a connecting piece that is integrally brazed to form a panel main body and protrudes outward,
A sandwich panel in contact with an outer surface of a frame member of the panel body, and the contact portion is joined by friction welding. 2. The connecting structure for connecting sandwich panels according to claim 1, wherein connecting pieces of connecting members of both sandwich panels to be connected are close to each other, and both panel main bodies are arranged on the same plane; A connection structure for sandwich panels, wherein both the connection pieces are sandwiched by a pair of connection plates and fixed by a fixing member. 3. The connecting structure for connecting sandwich panels according to claim 1, wherein the connecting pieces of the connecting members of both sandwich panels to be connected are overlapped, and both panel bodies are arranged on the same plane; A sandwich panel connecting structure, wherein the overlapping portion of the connecting piece is fixed by a fixing member. 4. The connecting structure for connecting sandwich panels according to claim 1, wherein the connecting pieces of the connecting members of both sandwich panels to be connected are overlapped, and both panel bodies are arranged on the same plane; A connection structure for a sandwich panel, wherein the overlapping portion of the connection piece is fixed by friction welding.