JPH0768680A - Brazed honeycomb panel - Google Patents

Abstract

(57) [Summary] [Structure] An aluminum brazed honeycomb panel in which a honeycomb core is formed by brazing and joining a number of brazing sheets to each other, and face plates are brazed to the upper and lower surfaces of the honeycomb core. A bent portion having a predetermined angle with the honeycomb core is formed at an edge portion on the upper surface side of the core, and a brazing material reservoir is formed between the bent portion and the face plate. [Effect] Even in a honeycomb panel having a large panel thickness, sufficient brazing remains in the brazing portion between the face plate and the honeycomb core to form a brazing joint having excellent joint strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazed honeycomb panel, and more specifically, when face plates are brazed to the upper and lower surfaces of a honeycomb core formed by bending an aluminum brazing sheet, the molten braze is flowed down. Due to this, the problem that brazing joining between the upper face plate and the upper surface side of the honeycomb core is not sufficiently performed is solved, and a sufficient brazing material remains in the brazing portion on the upper face plate and the upper surface side of the honeycomb core, The present invention relates to a brazed honeycomb panel capable of forming a bonded portion having excellent bonding strength.

[0002]

2. Description of the Related Art Aluminum honeycomb panels are shown in FIG.
As shown in FIG. 3, the aluminum honeycomb core 1 is a laminated body in which the upper and lower surfaces of the honeycomb core 1 are joined to the aluminum face plates 2 and 3. In particular, an aluminum brazed honeycomb panel in which aluminum brazing sheets are brazed to each other to form a honeycomb core, and aluminum face plates are brazed to the upper and lower surfaces of the honeycomb core, can be welded and bent. Since it can be processed, it has come to be used in various fields such as construction, vehicles, automobiles, and ships.

Conventionally, as the aluminum honeycomb panel, a panel having a panel thickness (core height) of 20 to 30 mm has been used, but as the application of the aluminum honeycomb panel expands, for example, a panel having a panel thickness of 50 to 120 mm is used. It is being requested. However, when an aluminum honeycomb panel having such a large panel thickness is to be manufactured by brazing and joining, face plates made of an aluminum brazing sheet are arranged on the upper and lower surfaces of the aluminum honeycomb core, and fixed with a jig in the furnace. However, the residual width W of the wax in the brazing portion between the upper face plate 2 of the honeycomb panel and the upper surface side of the honeycomb core 1 is caused by the flow of the molten wax as shown in FIG. There is a problem that _u becomes narrow and sufficient brazing and joining cannot be performed.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems in an aluminum honeycomb panel having a large panel thickness, and an object thereof is to provide aluminum face plates on the upper and lower surfaces of a honeycomb core. When brazing is performed, molten braze does not flow down, and sufficient brazing material remains in the brazing portion between the upper face plate and the upper surface side of the honeycomb core, so that the lower face plate 3 and the honeycomb core shown in FIG. Residual width W _{b of the} wax formed on the lower surface side of No. 1
Similarly, there is to provide a brazed honeycomb panel in which a brazed joint having a sufficiently wide brazing residual width is formed.

[0005]

In order to achieve the above object, a brazed honeycomb panel according to the present invention has a honeycomb core formed by brazing and joining a large number of brazing sheets to each other. In an aluminum honeycomb panel obtained by brazing and joining a face plate to a honeycomb plate, a bent portion having a predetermined angle with respect to the honeycomb core is provided at an edge portion on the upper surface side of the honeycomb core, and a brazing member is provided between the bent portion and the face plate. The structural feature is that the pool portion is formed.

The production of the brazed honeycomb panel of the present invention will be described. An aluminum brazing sheet 4 having a brazing material layer 5 on both sides is cut into a predetermined width as shown in FIG. Then, the bent portion 6 as shown in FIG. 2 is formed. Then, as shown in FIG. 3, the bending portion 6 is bent so that it has a half shape of a regular hexagon when viewed from a plane along the bending line F.
Are alternately bent to the right and left and bent so as to form a predetermined angle α with the aluminum brazing sheet 4. The angle α of the bent portion is preferably 20 to 60 °, taking into consideration the surface tension of the molten solder, the surface tension of the core, the gravity of the molten solder, and the like. It is necessary to select an angle that allows the molten brazing material to remain in the brazing material reservoir portion formed between the bent portion and the face plate.

When the aluminum brazing sheets 4 bent as shown in FIG. 3 are piled up as shown in FIG. 4, the honeycomb cores 1 in which the bent portions 6 are arranged back to back are formed. Face plates 2 and 3 made of an aluminum brazing sheet in which a brazing material 5 is clad on the core side are arranged on the upper and lower surfaces of the honeycomb core 1 and heated to a brazing temperature in a brazing furnace to form a core aluminum brazing sheet 4 The honeycomb core 1 and the face plates 2 and 3 formed by combining the same and the aluminum brazing sheet 4 are integrally brazed and joined. In this case, a gap 8 is formed between the face plate 2 and the honeycomb core 1 as shown in FIG.
Since it serves as a gas outlet during brazing, the brazing operation is facilitated and a better brazed joint is formed.

In the present invention, since the bent portion 6 having a predetermined angle α with respect to the aluminum brazing sheet 4 is formed on the aluminum brazing sheet 4 forming the honeycomb core 1, the core 1 and the face plates 2, 3 are formed.
When the brazing is performed, as shown in FIG. 5, the upper face plate 2
Since the brazing material reservoir 7 is formed between the upper surface side of the honeycomb core and the upper surface side of the honeycomb core, there is no flow of the molten brazing material at the joint,
The residual width of the braze in the brazing portion W ₁ on the upper face plate 2 and the honeycomb core upper surface side is sufficiently wide like the residual width of the braze formed on the brazing portion W ₂ between the lower face plate 3 and the honeycomb core lower surface side, A brazing joint having excellent joint strength can be obtained. The bent portions 6 may be formed on both side edge portions of the aluminum brazing sheet 4 forming the honeycomb core 1, and in this case, the bent portion 6 may also be formed on the lower face plate 3 and the brazing portion on the lower surface side of the honeycomb core 1. Will form a pool.

In FIG. 6, an aluminum brazing sheet 4 having both sides clad with a brazing material is cut into a predetermined width as in FIG. 1, and is bent so as to have a regular hexagonal shape when viewed from the same plane as in FIG. Corrugation is performed along the line F, and the bent portions 6 are bent in the same direction at an angle α, and the arrangement interval of the bent portions 6 is different from that in FIG.

A corrugated aluminum brazing sheet 4 shown in FIG. 6 is laminated as shown in FIG. 7 to form a honeycomb core 1, and a face plate 2 made of an aluminum brazing sheet is formed on the upper and lower surfaces of the honeycomb core 1.
3 is arranged so that the brazing material 5 is located on the core side and heated to a brazing temperature in a brazing furnace, the aluminum brazing sheet 4 forming the core and the core and the face plates 2 and 3 are integrally brazed. To be done.

Since the aluminum brazing sheet 4 forming the honeycomb core 1 is provided with the bent portion 6 having a predetermined angle α with respect to the aluminum brazing sheet 4, during brazing, as shown in FIG. A brazing portion 7 is formed between the bent portion 6 and the upper face plate 2 to prevent the molten braze from flowing down, and a brazing portion W having a sufficiently wide residual width of the brazing wax on the upper face plate 2 and the honeycomb core upper surface side. ₁ is formed and a satisfactory braze joint can be obtained.

In FIG. 9, the aluminum brazing sheet 4 is cut into a predetermined width in the same manner as in FIG. 1, and then the edge portion on one side corresponding to the bent portion 6 is cut into a V shape to bend the bent portion 6.
Is formed. As shown in FIG. 10, the aluminum brazing sheet 4 of FIG. 9 is bent along the bending line F, and the bent portion 6 is bent and overlapped to form the honeycomb core 1, and the face plates are arranged above and below. Brazing and joining. According to this method, interference between adjacent bent portions can be avoided, so that a larger number of bent portions can be formed than in the method of FIGS. 3 and 6, and strong brazing and joining can be performed. Also in this method, the bent portions 6 may be formed on both edge portions of the aluminum brazing sheet.

[0013]

According to the structure of the present invention, since the bent portion formed by bending the honeycomb core at a predetermined angle is formed at the edge portion on the upper surface side of the honeycomb core, the aluminum brazing sheet forming the honeycomb core is formed. When stacked in the shape of a core, face plates made of aluminum brazing sheets are placed on the upper and lower surfaces of the core to fix the whole, and when placed in a brazing furnace and heated to the brazing temperature, the upper face plate and honeycomb Since there is a pool of molten braze in the brazing part with the upper surface of the core, there is no flow of molten braze, and the residual width of the braze in the brazing part is sufficiently wide, and a brazing joint with high bonding strength is obtained. can get.

[0014]

EXAMPLES Examples of the present invention will be described below. Example 1 Aluminum brazing sheet BA24PC (thickness 0.2 mm,
Brazing material clad rate 5% on one side, core material 6951 alloy, brazing material 4045
Alloy, double-sided clad material, sheet width 98 mm)
As shown in, corrugated, with a width of 0.4 mm,
Form a bent part with a bending angle α of 30 °, and stack them as shown in Fig. 4 and arrange them in the shape of a honeycomb core with a cell size of 3/4 inch. The aluminum brazing sheet BA23PC ( 1.0 mm, brazing material clad ratio 5%, core material 6951 alloy, brazing material 4045 alloy, single-sided clad material) is placed in the brazing furnace to
A honeycomb panel with a thickness of 100 mm was manufactured by heating to ℃ and brazing. After brazing, a sample was cut out from the joined aluminum honeycomb panel, and the brazing part of the face plate and the core was investigated.The brazing part of the upper face plate and the honeycomb core upper surface side, and the lower face plate and the honeycomb core lower surface side In each case, formation of a sufficiently wide residual width of wax was observed. When a tensile test of the brazed portion was conducted, it was ruptured in the material portion, and it was shown that a brazed portion having excellent bonding strength was formed.

[0015]

As described above, according to the present invention, even if the panel thickness (core height) becomes large, a brazed honeycomb panel in which a brazing part having excellent bonding strength is formed between the face plate and the honeycomb panel. Will be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of an aluminum brazing sheet cut into a predetermined width to form a honeycomb core.

FIG. 2 is a perspective view showing a state in which a bent portion is formed on the aluminum brazing sheet of FIG.

FIG. 3 is a schematic perspective view showing a state where the aluminum brazing sheet of FIG. 2 is corrugated and bent at a bent portion.

FIG. 4 is a partial perspective view showing a state in which the aluminum brazing sheets of FIG. 3 are overlapped to form a honeycomb core and upper and lower face plates are arranged.

5 is a partial cross-sectional view showing a state in which the core and the face plate assembled as in FIG. 4 are brazed and joined.

FIG. 6 is a schematic perspective view showing another embodiment in a state where the aluminum brazing sheet is corrugated and the bent portion is bent.

FIG. 7 is a partial perspective view showing a state where the aluminum brazing sheets of FIG. 6 are overlapped to form a honeycomb core and face plates are arranged above and below.

FIG. 8 is a partial cross-sectional view showing a state in which the core and the face plate assembled as in FIG. 7 are brazed and joined.

FIG. 9 is a perspective view showing another example of a state in which a bent portion is formed on an aluminum brazing sheet.

FIG. 10 is a schematic perspective view showing a state where the aluminum brazing sheet of FIG. 9 is bent and the bent portion is bent to form a honeycomb core.

FIG. 11 is a perspective view in which a part of the honeycomb panel is cut away.

FIG. 12 is a partial cross-sectional view showing a conventional brazed portion between a core and a face plate.

[Explanation of symbols]

1 Honeycomb core 2 Face plate 3 Face plate 4 Aluminum brazing sheet 5 Brazing material 6 Bending part 7 Wax collecting part 8 Gap F Bending line W _u Residual width of brazing W _b Residual width of brazing W ₁ Brazing part W ₂ Brazing part

Claims (1)

[Claims] 1. An aluminum brazed honeycomb panel in which a plurality of brazing sheets are brazed to each other to form a honeycomb core, and face plates are brazed to both upper and lower surfaces of the honeycomb core, wherein an upper surface side of the honeycomb core is provided. A brazed honeycomb panel characterized in that a bent portion having a predetermined angle with respect to a honeycomb core is provided at an end edge portion, and a brazing portion is formed between the bent portion and the face plate.