JPH0796570A - Brazed honeycomb panel - Google Patents

Abstract

PURPOSE:To provide a rigid honeycomb panel in which the discontinuity of stress transmission between such members as face plates an a core, by a method wherein a folded part is formed at an end part of the honeycomb core where the honeycomb core comes into contact with the section, and at the folded part the honeycomb core is bonded to the section by brazing. CONSTITUTION:A panel is formed by integrally brazing a honeycomb core between aluminum brazing sheets. A T-shaped folded part 6 is formed at an end part A of the honeycomb core 1 where the honeycomb core 1 comes into contact with a shape 4a. A brazing material 5a is provided on the side of the aluminum section 4a facing the core 1. A brazing bonding part is formed on the folded part of the honeycomb core by a brazing material layer of the folded part 6 and a brazing material layer of the section 4a. A brazing material 5b is also provided on a shape 4b contacting with an end part B of the honeycomb core 1. The core-side end part B is bonded to the section 4b by brazing a brazing material layer of the core end part B with a brazing material layer of the section 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides excellent rigidity by brazing a brazed honeycomb panel, in particular, a honeycomb core and a shape member arranged at a side end portion of the honeycomb core to each other by brazing. Aluminum brazed honeycomb panel.

[0002]

2. Description of the Related Art As shown in FIG. 4, an aluminum honeycomb panel is a laminated body formed by joining aluminum face plates 2 and 3 to upper and lower surfaces of an aluminum honeycomb core 1. In particular, aluminum brazed honeycomb panels that are made by brazing and joining aluminum face plates on the upper and lower surfaces of a honeycomb core formed by polymerizing core materials made of aluminum brazing sheets are weldable. , Because it can be processed such as bending, construction,
It has come to be used in various fields such as vehicles, automobiles, and ships.

Usually, as shown in FIG. 5, a brazed honeycomb panel in which aluminum profiles 4 having various cross-sectional shapes are arranged at the side ends of the honeycomb core 1 according to the application is put into practical use. In manufacturing such an aluminum brazed honeycomb panel, as shown in FIG. 6, a core material made of an aluminum brazing sheet having brazing materials provided on both surfaces is cut into a predetermined width to form a regular hexagonal shape. As described above, the bent aluminum brazing sheets are polymerized to form the honeycomb core 1, the aluminum shape members 4 are arranged at the side end portions of the honeycomb core 1, and the brazing material 5 is vertically provided on the core side. It is carried out by disposing a face plate made of the provided aluminum brazing sheet, assembling it in the shape of a honeycomb panel, restraining it, charging it in a furnace, heating it, and integrally brazing and bonding it.

The inventors have conducted various performance measurements on an aluminum honeycomb panel. In the bending test and bending fatigue test of the honeycomb panel, the cells of the honeycomb core are often sheared or cracked in the face plate. As a result of the fact that a phenomenon has been experienced and the cause of this has been investigated, as a result, in the honeycomb panel manufactured as described above, as shown in FIG. 4 and the side end portion B is partly brazed to the shape member 4 because the core material forming the honeycomb core 1 is an aluminum brazing sheet having brazing materials on both surfaces. However, since it is not enough to obtain a strong bond between the profile 4 and the honeycomb core 1, a stress propagation discontinuity is formed between the honeycomb core and the profile, and If an external force is loaded to Mupaneru,
It was confirmed that stress could not be sufficiently propagated among the face plate, the core and the profile, so that stress was concentrated on the face plate and cracks were generated in the face plate.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems in aluminum brazed honeycomb panels, and its object is to braze a honeycomb core and a profile. However, it is another object of the present invention to provide a brazed honeycomb panel having excellent rigidity by eliminating discontinuity of stress propagation between the face plate, the core and the profile.

[0006]

To achieve the above object, a brazed honeycomb panel according to the present invention comprises a honeycomb core formed by polymerizing core materials made of a large number of aluminum brazing sheets, and side edges of the honeycomb core. In the aluminum brazed honeycomb panel in which the aluminum shape members arranged in the section and the face plates composed of the aluminum brazing sheets arranged above and below the honeycomb core are integrally brazed, the end of the honeycomb core at the portion in contact with the shape member A structural feature is that a bent portion is formed at the edge portion, and the honeycomb core and the shape member are brazed and joined at the bent portion.

In the present invention, as shown in FIG. 1, a T-shaped bent portion 6 is formed at the end edge portion A of the honeycomb core 1 which is in contact with the shape member 4a, and the aluminum shape member 4a has a core 1 side. A brazing material 5a is provided on the inner surface of the honeycomb core, and the brazing material layer of the bent portion 6 and the brazing material layer of the shaped material 4a form a brazing joint at the bent portion of the honeycomb core.
Preferably, the shape member 4 that is in contact with the edge B of the honeycomb core 1
The brazing material 5b is also provided at the b portion, and the brazing material layer of the core end edge portion B and the brazing material layer of the shape member 4b make the core-side end portion B have
It is brazed to b.

The bent portion formed at the end edge portion A of the honeycomb core 1 which is in contact with the shaped member 4a may be an L-shaped bent portion 7 as shown in FIG. Alternatively, an angled bending portion 8 as shown in FIG. 3 may be used. In this case, a molten brazing material reservoir portion 9 is formed between the bending portion 8 and the shape member 4a, and a strong brazing joint is formed. can get.

[0009]

According to the structure of the present invention, the honeycomb core and the profile are firmly brazed through the bent portion formed at the edge portion of the honeycomb core, and the face plate, the honeycomb core and the profile are formed as in the conventional case. Since they are brazed together, there is no discontinuity in stress propagation, and when an external force is applied to the honeycomb panel, sufficient stress propagation occurs between the face plate, core and profile, resulting in partial stress. I ’m not focused,
High rigidity is given to the honeycomb panel.

[0010]

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 25 mm) is bent, and the folded brazing sheet is polymerized and arranged in the shape of a honeycomb core with a cell size of 3/4 inch, and at the side edge of the honeycomb core, An aluminum profile provided with a brazing material was arranged on the honeycomb core side. A T-shaped bent portion was formed in advance on the edge portion of the core where the honeycomb core was in contact with the shape member. Then, on the upper and lower surfaces of the honeycomb core, aluminum brazing sheet BA23PC (thickness 1.0 mm,
A face plate made of a brazing material clad ratio of 5%, a core material 6951 alloy, a brazing material 4045 alloy, and a single-sided clad material is arranged and assembled into a honeycomb panel shape. It was held for 5 minutes and brazed to make an aluminum honeycomb panel with a thickness of about 27 mm.

The manufactured honeycomb panel was subjected to a three-point bending fatigue test with a stress value of 80 N / mm ² and a repetition rate of 10 ⁷ times, but no abnormality was found in each part of the honeycomb panel. On the other hand, the same fatigue test was performed on a honeycomb panel manufactured by brazing without forming a brazing material layer on the aluminum profile and forming a bent part on the core edge of the part where the honeycomb core contacts the profile. As a result, a part of the cells of the honeycomb core was sheared and broken.

[0012]

As described above, according to the present invention, an aluminum brazed honeycomb panel having excellent rigidity is provided.

[Brief description of drawings]

FIG. 1 is a partial plan view showing an example of an arrangement of honeycomb cores and profile members before brazing in the present invention.

[Fig. 2] Fig. 2 is a partial plan view showing another embodiment of an arrangement of honeycomb cores and profile members before brazing in the present invention.

FIG. 3 is a partial plan view showing still another embodiment of the arrangement of the honeycomb core and the profile before brazing in the present invention.

FIG. 4 is a perspective view in which a part of the honeycomb panel is cut away.

[Fig. 5] Fig. 5 is a cross-sectional view of a honeycomb panel in which an aluminum profile is provided on a side end portion of a honeycomb core.

FIG. 6 is a perspective view showing an assembled state of the honeycomb panel before brazing and joining.

[Fig. 7] Fig. 7 is a plan view showing a relationship between a core and a shape member of a conventional honeycomb panel.

[Explanation of symbols]

 1 Honeycomb core 2 Face plate 3 Face plate 4 Shape member 4a Shape member 4b Shape member 5 Brazing material 5a Brazing material 5b Brazing material 6 Bending part 7 Bending part 8 Bending part 9 Brazing part

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[Procedure amendment]

[Submission date] November 29, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

In the present invention, as shown in FIG. 1, a T-shaped bent portion 6 is formed at the end edge portion A of the honeycomb core 1 which is in contact with the shape member 4a, and the aluminum shape member 4a has the core 1 side. A brazing material 5a is provided on the inner surface of the honeycomb core, and the brazing material layer of the bent portion 6 and the brazing material layer of the shaped material 4a form a brazing joint at the bent portion of the honeycomb core.
Preferably, the shape member 4 that is in contact with the edge B of the honeycomb core 1
The brazing material 5b is also provided in the b portion, and the brazing material layer of the core end edge portion B and the brazing material layer of the shape member 4b make the core side end portion B have
It is brazed to b. Instead of the brazing material layers 5a and 5b provided on the shaped members 4a and 4b, a double-sided brazing sheet or a sheet-shaped brazing material may be interposed between the shaped members and the honeycomb core.

Claims (1)

[Claims] 1. A honeycomb core formed by polymerizing a core material made of a large number of aluminum brazing sheets, and an aluminum profile member arranged at a side end portion of the honeycomb core,
In an aluminum brazed honeycomb panel that is integrally brazed with face plates made of aluminum brazing sheets arranged above and below the honeycomb core, a bent portion is formed at an end edge portion of the honeycomb core in a portion in contact with the profile, A brazed honeycomb panel, characterized in that a honeycomb core and a shape member are brazed and joined at a bent portion.