JPH1162101A - Sandwich panel and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation during weld, and thus form sandwich panels with a fine outside appearance by friction welding the inside of joint parts of surface boards to allow the welded parts not to be exposed on the surface, and bonding core materials to the inside. SOLUTION: Each surface board single body 11 consisting of aluminum is joined to each other through abutment, and the rear sides thereof are welded by friction weld 40 for forming a large surface board 10. Next, held between a pair of the surface boards 10, 10 having the welded part put inside are core materials 30 made by a sheet plate into a cylinder having a circular, triangle, square, and pentagonal shape or more, and the surface materials 10, frame material 20, and core materials 30 are joined (bonded) together by brazing filler metal or an adhesive. Besides, a heat insulation panel is formed by employing as core material polyurethane or the like for the core materials 30. Also, in order to ensure the blind of a joint line 14 further, a paint is applied on the surface after the finish done by brazing filler metal, putty, or the like. In this way, a sandwich panel can be obtained having lightweight and fineness.

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 method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a sandwich panel formed by integrally joining a pair of aluminum alloy (hereinafter referred to as aluminum) surface plates and a core material interposed between the surface plates by brazing or bonding has been known. Because of its excellent heat insulation and sound insulation properties, it is widely used as a building material for interiors and exteriors.

Since the size of this sandwich panel is limited, a plurality of panel members having a core material interposed between a pair of surface plates are joined as described above to form a larger-sized sandwich panel. I have.

[0004] Therefore, conventionally, a panel body divided into a predetermined size is manufactured, an arc is generated between the surface plate (base material) of the panel body and the tungsten electrode, an inert gas is flowed from a nozzle, and oxidation of a welded portion is performed. Using TIG (Tungsten InertGas) welding, which welds while preventing nitriding, or MIG (Metal Inert Gas) welding, which welds by generating an arc between the surface plate (base material) of the panel body and the electrode wire To produce a wide sandwich panel of a desired size.

As another manufacturing method, a wide sandwich panel is formed by joining panel bodies divided into predetermined dimensions using fixing members such as bolts and nuts.

[0006]

However, when the panel body is welded by using the former, that is, welding, the welded portion is exposed on the surface and the panel is deformed due to distortion caused by heat during welding. There was a problem that was damaged.

[0007] Further, since joining of the surface plates has a problem in strength, it is necessary to join frame members. Therefore, it is necessary to provide chamfers (grooves) on the contact surfaces (welding surfaces) of the frame members of both panel bodies, and there is a problem in that processing is troublesome. Further, there is a problem that excessively thick portions are present more than necessary and the quality tends to be excessive, resulting in an increase in cost.

On the other hand, in the latter case, in which the panel body is joined using fixing members such as bolts and nuts, the processing of the joining portion is complicated, and the tightening of the bolts and nuts requires many man-hours. Aesthetic considerations, such as eliminating the exposure of bolts and nuts, were required. In addition, it is necessary to arrange a strength member, for example, a frame made of an extruded member in advance in consideration of the strength of the joint portion, so that many components are required and the weight is increased.

The present invention has been made in view of the above circumstances, and has a structure in which a surface plate is joined without exposing a welded portion to the surface, and furthermore, distortion (deformation) due to the influence of heat during welding.
It is an object of the present invention to provide a sandwich panel having no gap and a method for manufacturing the same.

[0010]

According to a first aspect of the present invention, there is provided a sandwich panel comprising a pair of aluminum surface plates and a core material interposed between the surface plates. The surface plate is formed by abutting a plurality of surface plates alone,
The contact portion on the core material side is joined by friction welding. In this case, as the core material, any shape such as a cylindrical shape such as a circle, a triangle, a square or a polygon, a honeycomb shape, or any other foamable heat insulating core material can be used. .

[0011] The sandwich panel according to claim 3 is a sandwich panel formed by joining a pair of aluminum surface plates and an aluminum core material interposed between the surface plates by brazing. A plurality of surface plates formed of a brazing sheet clad with a brazing material on one side of the base material are brought into contact with each other, and a contact portion between the brazing material and the base material located on the core material side is formed. It is characterized by being joined by friction welding.

A sandwich panel according to a fourth aspect is characterized in that, in the sandwich panel according to the first or third aspect, a finishing member is buried in the surface of the abutting portion between the surface plates alone. In this case, as the finishing member, for example, any one of brazing material, putty, adhesive or paint, or a combination of these can be used (claim 5).

According to a sixth aspect of the present invention, there is provided a sandwich panel manufacturing method comprising: a pair of aluminum surface plates; and a core material interposed between the surface plates. A step of joining one side of the abutting portions by friction welding; and a step of interposing a core material between the surface plates with the friction welded portion side as an inner surface and joining the surface plate and the core material. It is characterized by.

According to a seventh aspect of the present invention, there is provided a sandwich panel manufacturing method comprising: a pair of aluminum surface plates; and a core material interposed between the surface plates. A step of joining one side of the abutting portions to each other by friction welding, and between the two surface plates facing each other with the friction welding portions facing each other,
And foaming the foamable heat insulating core material.

According to an eighth aspect of the present invention, there is provided the sandwich panel manufacturing method according to the third aspect, wherein the brazing material and the base material of the contact portions of the surface plates are joined by friction welding. And a step of interposing a core material between the surface plates with the brazing material side as the inner surface, and joining the surface plate and the core material by brazing.

According to a ninth aspect of the present invention, there is provided the sandwich panel manufacturing method according to any one of the sixth to eighth aspects, wherein a finishing member is provided on the surface of the abutting portion between the surface plates alone. The method further comprises the step of embedding.

According to the first, third, sixth or eighth aspect of the present invention, the surface plates are brought into contact with each other, the contact portions are joined by friction welding, and the friction welded portions are directed inward, that is, toward the core material. By arranging and joining the surface plate and the core material, only the contact line of the surface plate alone appears on the surface without exposing the welded portion to the surface, so that the appearance is not impaired.
Further, by joining the surface plates alone by friction welding and then joining the surface plate and the core material, it is possible to provide a sandwich panel free of thermal distortion.

According to the seventh aspect of the present invention, by filling the heat insulating core material between the surface plates and joining the surface plate and the heat insulating core material, it is possible to provide a sandwich panel having higher heat insulating properties. .

According to the invention as set forth in claim 4 or 9, a finishing member, for example, one of a brazing material, a putty, an adhesive or a paint, or a finishing material is provided on the surface of the contact portion between the surface plates alone. By embedding a suitable combination of the above, the contact line between the surface plates alone can be hidden from the outside, so that the surface of the sandwich panel can be further integrated to make up, and the overall appearance of the panel can be improved. Can be planned.

[0020]

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

First Embodiment FIG. 1 is a perspective view showing a cross section of a sandwich panel according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view showing a main part of the sandwich panel of the first embodiment, and FIG. It is an outline sectional view showing a manufacturing procedure of a sandwich panel of an embodiment.

The sandwich panel includes a pair of surface plates 10 and a frame member 2 interposed between sides of the surface plates 10.
0, and a large number of, for example, cylindrical core members 30 interposed in a space formed by the pair of surface plates 10 and the frame member 20.

In this case, the surface plate 10 is formed to be wide by joining rectangular surface plates 11 having predetermined dimensions, for example, a maximum width of 1200 to 1300 mm, by friction welding 40. The surface plate unit 11 is formed of a brazing sheet in which a brazing material 13 is coated on one side of a base material 12 made of aluminum. The core member 30 is formed by bending an aluminum strip into a cylindrical shape or a cylindrical body, and the frame member 20 is formed by, for example, a hollow rectangular aluminum extruded member. . The surface plate 10 and the core material 30 thus formed
And the frame member 20 are integrally joined by brazing to form a sandwich panel.

In order to manufacture the sandwich panel configured as described above, first, a rectangular surface plate 11 formed of a brazing sheet and a frame member 2 having a rectangular cross section are formed.
A number of 0 and a large number of cylindrical core materials 30 are prepared. next,
As shown in FIG. 3A, the surface plates 11 with the brazing material 13 side facing up are placed on the base plate 50 in a state where the surface plates 11 are in contact with each other, and the side plates 11 are placed side by side so that the surface plates 11 are in close contact. Press the fixing tool 60 from above to hold the both surface plates 11 alone (FIG. 4).
reference).

Next, as shown in FIGS. 3 (a) and 4,
A probe 72 protruding from the lower surface of a cylindrical shoulder 71 held by a rotation holding means (not shown) is pressed against the upper surface of the contact portion of the both surface plates 11.
1 and the probe 72 are rotated at high speed (for example, 1000 to 50).
(00 rpm), the contact portions of both surface plates 11 are softened by frictional heat, agitated, and metal is pressed down in the movement direction and friction welded 40. Thereby, the surface plates 11 are joined to each other to form the wide surface plate 10. In this case, the friction welding 40 only needs to weld at least the base materials 12 of the surface plate 11 alone. For example, as shown in FIG.
As shown in FIG. 2 (b), any of the base material 12, which is welded over the entire area that does not cover the exposed surface, may be used. By joining the surface plates 11 by friction welding 40 in this manner, only the joining line of the surface plates 11 appears on the exposed surface side of the base material 12.

Next, as shown in FIG. 3 (b), after the surface plate 10 is disposed on one side of the frame member 20 which is framed in a rectangular shape with the friction welding portion 40 as an upper surface, the frame member 20 is formed. The core member 30 is arranged in the inner space of the frame member 20, and the surface plate 10 is arranged on the other surface side of the frame member 20 with the friction welding 40 part being the lower surface. Then, the surface plate 10, the frame member 20 and the core member 30 are heat-treated, thereby melting the brazing material 13, brazing and integrally forming a sandwich panel (see FIG. 3 (c)).

In the above brazing, the frame material 20
It is preferable to provide an air vent hole (not shown) at an appropriate location and on the side surface of the core material 30. By providing an air vent hole, the core material 30 can be formed at a high temperature during panel molding.
This is because air expanding in the hollow portion can be discharged to the outside, and the formability of the panel can be improved. In this case, by forming the core material 30 by a brazing sheet clad with a brazing material, even when the core material 30 is formed by bending an aluminum alloy strip, after forming the panel, The separating portions at both ends of the strip are joined by brazing, and the core material 30 becomes completely cylindrical. In this case, the shape of the core member 30 may be a cylindrical shape other than the cylindrical shape, for example, a polygon such as a triangle, a square, a pentagon, or a hexagon or more.

The sandwich panel manufactured as described above has a wide surface plate 10 in which the surface plates 11 divided into predetermined dimensions are joined together by friction welding 40, so that the sandwich panel is a lightweight wide panel. be able to. Further, since the friction welding 40 portion of the surface plate 10 is arranged toward the core material 30 side, the surface plate alone 11 is provided on the surface of the panel.
Only the joining lines 14 appear, and the appearance is not impaired. In addition, if necessary, the joining line 14 can be hidden by painting the surface plate 10 or the like,
The appearance can be improved. Further, in the above sandwich panel, since the surface plates 11 are joined together by friction welding 40, and then the surface plate 10, the frame member 20 and the core member 30 are integrally joined by brazing, the panel itself generates heat during friction welding. It is not affected and there is no fear of distortion or deformation.

Second Embodiment FIG. 5 is a schematic sectional view showing a manufacturing procedure of a second embodiment of the sandwich panel according to the present invention.

In the first embodiment, the case where the surface plate 10 (specifically, the surface plate 11 alone) is formed of a brazing sheet clad with the brazing material 13 has been described. Does not need to be a brazing sheet, and may be an aluminum member. In this case, the surface plate 10 in which the surface plates 11 are joined to each other by friction welding 40, and the frame material 20 and the core material 30 are combined with the brazing material 1
A sandwich panel can be manufactured by brazing through 3A.

In order to manufacture the sandwich panel of the second embodiment, first, a rectangular surface plate 11 alone, a frame member 20 having a rectangular cross section, and a large number of cylindrical core members 30 are prepared. Next, as shown in FIG. 5A, the surface plates 11 are placed on the base plate 50 in a state where the surface plates 11 are in contact with each other, and a fixing tool (see FIG. (Not shown) is pressed to hold the both surface plates 11 alone.

Next, as shown in FIG. 5 (a), similarly to the first embodiment, a columnar shape held by rotating holding means (not shown) is provided on the upper surface of the abutting portion of the both surface plates 11 alone. When the probe 72 protruding from the lower surface of the shoulder 71 is pressed and moved in the horizontal direction while rotating the shoulder 71 and the probe 72 at a high speed (for example, 1000 to 5000 rpm), the contact portions of the both surface plates 11 are While being softened by the frictional heat, the metal is agitated and the metal is pressed backward in the moving direction, and friction welding 40 is performed. This allows
The surface plates 11 are joined together to form a wide surface plate 10. In this case, the friction welding 40 may be at least welded to the middle of the surface plate 11 alone, or may be welded to the entire surface of the surface plate 11 that does not cover the exposed surface. By joining the surface plates 11 by friction welding 40 in this manner, only the joining line of the surface plate 11 appears on the exposed surface side of the surface plate 10.

Next, as shown in FIG. 5 (b), the surface plate 10 is disposed on one side of the frame member 20 which is framed in a rectangular shape, with the friction welding 40 portion being on the upper side, and then the frame member 20 is formed. The core material 30 is arranged with the brazing material 13 </ b> A interposed in the inner space of the frame member 20, and the face plate 10 with the friction welding 40 part on the lower surface is arranged on the other surface side of the frame material 20 with the brazing material 13 </ b> A interposed. Then, the surface plate 10, the frame member 20, and the core member 30 are heat-treated, and thereby the brazing material 13 is melted, brazed, and integrally formed to form a sandwich panel (see FIG. 5C).

In this case, the core material 30 is formed of a brazing sheet clad with a brazing material, so that even when the core material 30 is formed by bending an aluminum alloy strip, a panel is formed. Later, the separating portions at both ends of the strip are joined by brazing, and the core material 30 becomes completely cylindrical.

In the second embodiment, the other parts are the same as those in the first embodiment, and the description is omitted.

The sandwich panel manufactured as described above can be a lightweight and wide panel similarly to the first embodiment.
Since the zero part is arranged toward the core material 30 side, only the joining line 14 between the surface plates 11 appears on the surface of the panel, so that the appearance is not impaired. Moreover,
In the above sandwich panel, after the surface plates 11 are joined together by friction welding 40, the surface plate 10, the frame member 20 and the core member 30 are integrally joined by brazing, so that the panel itself is not affected by heat during friction welding. There is no fear of distortion or deformation.

Third Embodiment FIG. 6 is a sectional perspective view of a third embodiment of the sandwich panel according to the present invention.

In the first and second embodiments,
Although the case where the core material is formed in a cylindrical shape such as a cylinder has been described, the core material is not necessarily required to be cylindrical, and as shown in FIG. 6, an aluminum strip is formed into a trapezoidal wave shape. The honeycomb core material 31 may be bent and bonded.

In order to manufacture the sandwich panel having the honeycomb-shaped core material 31 as described above, similarly to the first embodiment or the second embodiment, the surface plates 11 are joined to each other by friction welding so as to be wide. The surface plate 10 may be formed, and the surface plate 10 and the frame member 20 and the core member 31 may be joined by brazing by arranging the friction welding 40 of the surface plate 10 on the inside, that is, on the core material side.

In the third embodiment, the other parts are the same as those in the first and second embodiments, and the description is omitted.

Fourth Embodiment FIG. 7 is a sectional perspective view of a fourth embodiment of the sandwich panel according to the present invention, and FIG. 8 is a schematic sectional view showing a procedure for manufacturing the sandwich panel of the fourth embodiment.

In the fourth embodiment, the core material is formed of a foamed heat insulating core material. That is, a sandwich panel is formed by foam-filling a foaming heat insulating core material 32 such as foamed polyurethane between the surface plates 10 formed by joining the surface plates 11 by friction welding 40.

In order to manufacture the sandwich panel of the fourth embodiment, similarly to the first to third embodiments, the front panel 11 is placed on the base plate 50 in a state where the front panels 11 are in contact with each other. Then, a fixing tool (not shown) is pressed from the side to hold the two surface plates 11 in close contact with each other.

Next, as shown in FIG. 8A, similarly to the first embodiment, a columnar shape held by rotation holding means (not shown) is provided on the upper surface of the contact portion of the two face plates 11 alone. When the probe 72 protruding from the lower surface of the shoulder 71 is pressed and moved in the horizontal direction while rotating the shoulder 71 and the probe 72 at a high speed (for example, 1000 to 5000 rpm), the contact portions of the both surface plates 11 are While being softened by the frictional heat, the metal is agitated and the metal is pressed backward in the moving direction, and friction welding 40 is performed. This allows
The surface plates 11 are joined together to form a wide surface plate 10. In this case, the friction welding 40 may be at least partially welded to the middle of the surface plate 11, or may be welded over the entire area of the surface plate 11 that does not cover the exposed surface. By joining the surface plates 11 by friction welding 40 in this manner, only the joining line of the surface plate 11 appears on the exposed surface side of the surface plate 10.

Next, as shown in FIG. 8 (b), the surface plate 10 is arranged on one side of the frame member 20 framed in a rectangular shape with the friction welding portion 40 as the upper surface. On the surface side, a surface plate 10 having a friction welding 40 part on the lower surface is arranged.
Then, a heat insulating core material 32 made of, for example, foamed polyurethane or the like is injected from a nozzle 80 that enters the space 15 formed by the surface plate 10 and the frame material 20, and then foamed and filled to form a sandwich panel. (See FIG. 7 and FIG. 8 (c)).

The sandwich panel manufactured as described above can be a lightweight and wide panel as in the first embodiment.
Since the zero part is arranged toward the heat insulating core material 32 side, only the joining line 14 between the surface plates 11 appears on the surface of the panel, and the appearance is not impaired. Moreover,
In the above sandwich panel, after the surface plates 11 are joined to each other by friction welding 40, the space 15 formed by the surface plate 10 and the frame member 20 is foam-filled with a heat insulating core material 32 to form a heat insulating material. Since the panel is joined to the core material 32, the panel itself is not affected by heat during friction welding, and there is no fear of distortion or deformation. Furthermore, by filling the heat insulating core material 32 between the surface plates 10, a sandwich panel having high heat insulating performance can be provided.

Fifth Embodiment FIG. 9 is an enlarged sectional view of a main part showing an example of a sandwich panel according to a fifth embodiment of the present invention, and FIG. 10 is a schematic sectional view showing a manufacturing procedure of the sandwich panel of the fifth embodiment. It is.

In the fifth embodiment, the contact line 14 of the contact portion between the surface plates 11 is blindfolded (makeup) from the outside. That is, as shown in the first embodiment or the second embodiment, when the surface plate 10, the frame member 20 and the core member 30 are integrally joined by brazing, the surface plate 11 is used to finish The surface plate 10, the frame member 20 and the core member 30 are heat-treated with a member such as a linear brazing material 90 interposed therebetween, and thereby the brazing material 13 is melted and brazed and integrally formed, and at the same time, the linear brazing material 90 is melted. In this case, the contact line 14 is buried on the surface side of the joining line 14 so as to cover (make up) the contact line 14.

In this case, as shown in FIG. 9, by providing a chamfer 11a at the end on the contact side of the surface plate 11 alone, the adhesion between the surface plate 11 and the linear brazing material 90 is improved. Therefore, blindfolding of the contact line 14 can be further ensured.

In order to manufacture the sandwich panel of the fifth embodiment, as in the first to fourth embodiments, the surface panels 11 are placed on the base plate 50 in a state where they are in contact with each other. Then, a fixing tool (not shown) is pressed from the side to hold the two surface plates 11 in close contact with each other.

Next, as shown in FIG. 10A, in the same manner as in the first embodiment, a columnar shape held by rotation holding means (not shown) When the probe 72 protruding from the lower surface of the shoulder 71 is pressed and moved in the horizontal direction while rotating the shoulder 71 and the probe 72 at a high speed (for example, 1000 to 5000 rpm), the contact portions of the both surface plates 11 are While being softened by the frictional heat, the metal is agitated and the metal is pressed backward in the moving direction, and friction welding 40 is performed. This allows
The surface plates 11 are joined together to form a wide surface plate 10.

Next, as shown in FIG. 10 (b), the surface plate 10 is disposed on one side of the frame member 20 framed in a rectangular shape, with the friction welding 40 part being on the upper side. The core member 30 is disposed in the inner space of the frame member 20, the surface plate 10 is disposed on the other surface side of the frame member 20 with the friction welding 40 part as a lower surface, and a line is formed on the surface side of the joint between the surface plate members 11 alone. Brazing filler metal 9
0 is placed. Then, the surface plate 10, the frame member 20, and the core member 30 are heat-treated, thereby melting and brazing the brazing material 13 and the linear brazing material 90 to form a sandwich panel (FIGS. 9 and 10). (C)).

In the sandwich panel manufactured as described above, since the brazing filler metal 90A is buried in the surface of the joining line 14 between the surface plates 11 alone, the joining line 14 must be actively covered (makeup) from the outside. Thus, the appearance of the entire panel can be improved.

In the above description, the finishing member is
Although the case where the linear brazing material 90 is used has been described, for example, a putty, an adhesive, a paint, or the like may be used instead of the linear brazing material 90. When these putties, adhesives, paints, or the like are used as finishing members, the surface plate 10, the frame member 20, and the core member 30 are integrally brazed by heat treatment, and then the bonding line 14 is formed.
A finishing member such as putty is buried on the surface of. Further, in order to further securely cover the joining line 14, the linear brazing material 9 may be used.
After embedding a finishing member such as 0 or putty, a paint may be applied to the surface.

In the above description, the surface plate 10 and the frame 2
Although the case where the core material 30 and the core material 30 are integrally joined by the brazing material has been described, in the case of integrally joining using an adhesive or joining by foaming the heat insulating core material 32, putty, an adhesive or Any one of the paints or a combination thereof as appropriate can be used.

◎ Other Embodiments In the first to third embodiments, the surface plate 10
Although the description has been given of the case where the core members 30 and 31 are joined by brazing, the front plate 10 and the core members 30 and 31 may be joined using an adhesive instead of the brazing material. In the first to third embodiments,
The case where the surface plate 10 and the core members 30 and 31 are formed of aluminum members has been described.
1 does not necessarily have to be an aluminum member, but may be formed of, for example, a paper member and adhered to the surface plate 10 using an adhesive.

In the above embodiment, the case where the frame member 20 is formed of a hollow rectangular extruded aluminum member has been described, but the shape of the frame member 20 is limited to that of the above embodiment. Instead of the aluminum member, any shape may be used, and a member made of, for example, a synthetic resin may be used instead of the aluminum member. Further, the frame member 20 does not necessarily need to be used, and a sandwich panel without a frame member can be used.

[0058]

As described above, according to the present invention, the following excellent effects can be obtained.

1) According to the first, third, sixth or eighth aspect of the present invention, the surface plates are brought into contact with each other, and the contact portions are joined by friction welding. And the surface plate and the core material are joined to each other, so that a lightweight and wide sandwich panel can be provided. Moreover, since only the contact line of the surface plate appears on the surface without exposing the welded portion to the surface, the appearance is not impaired. Also, after joining the surface plates by friction welding,
Since the surface plate and the core member are joined, it is possible to provide a sandwich panel free from deformation due to generation of thermal distortion.

2) According to the seventh aspect of the present invention, since the heat insulating core material is filled between the surface plates, it is possible to provide a sandwich panel having higher heat insulating properties in addition to the above 1).

3) According to the invention described in claim 4 or 9,
A finishing member, for example, any one of brazing material, putty, adhesive or paint, or
By embedding a combination of these as appropriate, the contact line between the surface plates alone can be hidden from the outside, so that in addition to the above 1), the surface of the sandwich panel can be further integrated to make up, The appearance of the entire panel can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view showing a first embodiment of a sandwich panel according to the present invention.

FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the sandwich panel of the first embodiment.

FIG. 3 is a schematic cross-sectional view showing a procedure for manufacturing the sandwich panel of the first embodiment.

FIG. 4 is a perspective view showing friction welding of the surface plate alone in the first embodiment.

FIG. 5 is a schematic cross-sectional view showing a procedure for manufacturing the sandwich panel according to the present invention.

FIG. 6 is a sectional perspective view showing a third embodiment of the sandwich panel according to the present invention.

FIG. 7 is a sectional perspective view showing a fourth embodiment of the sandwich panel according to the present invention.

FIG. 8 is a schematic cross-sectional view showing a procedure for manufacturing the sandwich panel of the fourth embodiment.

FIG. 9 is an enlarged sectional view of a main part showing an example of a fifth embodiment of the sandwich panel according to the present invention.

FIG. 10 is a schematic sectional view showing a procedure for manufacturing the sandwich panel of the fifth embodiment.

[Explanation of symbols]

 Reference Signs List 10 surface plate 11 surface plate simple substance 12 base material 13 brazing material 13A brazing material 14 joining line 15 space 20 frame material 30 core material 31 honeycomb core material 32 heat insulating core material 40 friction welding 90 linear brazing material (finish member) 90A Brazing material (finish material)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Matsunaga 1-34-1 Kambara, Kambara-cho, Anbara-gun, Shizuoka Prefecture Nippon Light Metal Co., Ltd., Group Technology Center 1-34-1, Kamaharacho, Nippon Light Metal Co., Ltd., Group Technology Center

Claims (9)

[Claims] 1. A sandwich panel comprising a pair of aluminum surface plates and a core material interposed between the surface plates, wherein the surface plate is formed by bringing a plurality of surface plates into contact with each other. A sandwich panel wherein the contact portions on the core material side are joined by friction welding. 2. The sandwich panel according to claim 1, wherein the core material is any one of a tubular shape, a honeycomb shape, and a foamed heat insulating core material. 3. A sandwich panel in which a pair of aluminum surface plates and an aluminum core material interposed between the surface plates are joined by brazing, wherein the surface plate has a brazing material on one surface of a base material. A plurality of surface plates formed of a brazing sheet clad with a brazing sheet are brought into contact with each other, and the contact portions of the brazing material and the base material located on the core material side are joined by friction welding. Characterized by a sandwich panel. 4. The sandwich panel according to claim 1, wherein a finishing member is buried in the surface of the abutting portion between the surface plates alone. 5. The sandwich panel according to claim 4, wherein said finishing member is made of any one of brazing material, putty, adhesive or paint, or a combination of these as appropriate. Sandwich panel. 6. A method for manufacturing a sandwich panel comprising a pair of aluminum surface plates and a core material interposed between the surface plates, wherein one side of the contact portion between the surface plates is subjected to friction welding. And a step of joining a core material between the surface plates with the friction welded portion side as an inner surface, and joining the surface plate and the core material. 7. A method for manufacturing a sandwich panel comprising a pair of aluminum surface plates and a core material interposed between the surface plates, wherein one surface of the contact portion between the surface plates is friction-welded. And a step of foam-filling a foamable heat insulating core material between the two face plates facing each other with the friction welded portions facing each other. 8. A method for manufacturing a sandwich panel according to claim 3, wherein a step of joining the brazing material and the base material of the abutting portions of the surface plates alone by friction welding, wherein the brazing material side is an inner surface. Core material is interposed between the face plates,
Joining the surface plate and the core material by brazing. A method for manufacturing a sandwich panel, comprising: 9. The method for manufacturing a sandwich panel according to claim 6, further comprising a step of burying a finishing member on the surface of the abutting portion between the surface plates alone. Panel manufacturing method.