JPH10128529A - Production of aluminum honeycomb panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the production method of the aluminum honeycomb panel capable of brazing a frame body and a face plate with high strength. SOLUTION: This aluminum honeycomb panel is produced by interposing a frame body 1 made of an aluminum extruded shape and a honeycomb core 2 made of an aluminum brazing sheet formed into a corrugated shape between a pair of aluminum face plates 3, 4 and assembling then by brazing. The face plates 3, 4 in which a brazing filler metal is cladded on the faces in contact with the frame body 1 and the honeycomb core 2, are used, the frame body 1, in which a brazing filler metal of 0.05-0.20mm thickness is cladded ion its outer surface, is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an aluminum honeycomb panel used for a vehicle, a ship, an outer wall of a building, or the like by a vacuum brazing method or the like. In the present invention, aluminum is intended to include not only pure aluminum but also aluminum alloy.

[0002]

2. Description of the Related Art As shown in FIG. 1, an aluminum brazed honeycomb panel 10 has a plurality of frames 1 and a honeycomb core 2 serving as a reinforcing material or an outer frame interposed between face plates 3 and 4, and these frames are formed. 1. The honeycomb core 2 and the face plates 3 and 4 are integrally brazed by a vacuum brazing method or the like. The frame 1 is formed from an extruded aluminum material, and the honeycomb core 2 is formed by forming an aluminum brazing sheet into a corrugated shape and arranging the corrugated sheet so that its surface is perpendicular to the face plates 3 and 4.

[0003] Of these, the brazing between the frame 1 and the face plates 3 and 4 is performed by joining the surfaces, so that brazing joint failure is likely to occur. When the brazing joint strength is insufficient, defects such as swelling and peeling occur in the face plate during welding for connecting the panels after brazing, and it becomes difficult to secure the necessary joining strength.

Therefore, in order to improve the brazing property between the frame body and the face plate, a method of ensuring wettability with the brazing material by removing an oxide film by surface treatment of the extruded profile (Japanese Patent Laid-Open No. 7-1995). No. 300685) and a method of inserting a double-sided brazing sheet or a brazing material sheet between an extruded profile (frame) and a face plate to compensate for the shortage of the brazing material amount (JP-A-7-189)
No. 419) has been proposed.

[0005]

However, the method of inserting a brazing sheet or brazing sheet between the extruded profile and the face plate involves brazing because the core material of the brazing sheet or brazing sheet remains. There is a drawback that the joining strength tends to decrease. In addition, poor adhesion between the base material composed of the extruded profile and the face plate and the brazing sheet or brazing material sheet may occur, or the brazing sheet or brazing material sheet may be insufficiently assembled, resulting in a shortage of the absolute amount of brazing material. There are also problems such as a decrease in the joining rate.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for manufacturing an aluminum honeycomb panel capable of brazing and joining a frame and a face plate with high strength.

[0007]

According to the present invention, there is provided a method for manufacturing an aluminum honeycomb panel, comprising a pair of a honeycomb body made of an aluminum extruded shape member and a corrugated aluminum brazing sheet sandwiched therebetween. In a method for manufacturing an aluminum honeycomb panel in which aluminum face plates are arranged and assembled by brazing, the face plate uses a material in which a brazing material is clad on a surface that contacts the frame and the honeycomb core, and the frame is It is characterized in that its outer surface is clad with a brazing material having a thickness of 0.05 to 0.20 mm.

In the method for manufacturing an aluminum honeycomb panel according to the present invention, the outer surface of the frame has a thickness of 0.05 mm.
~ 0.20mm brazing material is clad,
The brazing material on the outer surface of the frame is interposed between the frame and the face plate together with the brazing material clad on the frame contact surface of the face plate. For this reason, at the time of vacuum brazing, a sufficient amount of brazing exists between the frame and the face plate, and the frame and the face plate can be joined with high strength and a high joining rate.

Further, in the present invention, as in the prior art,
Since there is no need to insert a brazing material sheet or the like between the face plate and the frame, the core material of the brazing material sheet is not interposed between the base materials, and the face plate and the frame are directly joined by the brazing, Extremely high bonding strength can be obtained. Furthermore, since there is no adhesion failure and assembly failure as in the case of inserting a brazing material sheet, the brazing joining rate is extremely high.

[0010] In the present invention, since the brazing material is clad on the outer surface of the frame, the brazing material also exists between the honeycomb core and the honeycomb core in contact with the side surface of the frame. For this reason, the frame body and the honeycomb core are brazed by vacuum brazing, and the strength is further improved.

In the present invention, the brazing material clad on the outer surface of the frame has a thickness of 0.05 to 0.20 mm. If the thickness of the brazing material is less than 0.05 mm, the object of the present invention cannot be achieved, and sufficient joining strength and joining rate cannot be obtained. On the other hand, if the thickness of the brazing material is 0.2
If it exceeds 0 mm, erosion may occur.
Therefore, the thickness of the brazing material is set to 0.05 to 0.20 mm.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be specifically described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an aluminum honeycomb panel according to an embodiment of the present invention. A plurality of frames 1 and honeycomb cores 2 are arranged between the upper and lower plates 3 and 4 such that the honeycomb cores 2 are sandwiched or surrounded by the frame 1. Face plates 3 and 4 are JIS
The honeycomb core 2 is made of a core material made of 6951 alloy and clad on one surface with a brazing material of JIS4004 alloy.
JIS on one or both sides of core material made of IS6951 alloy
It is formed by forming a clad brazing material made of 4004 alloy into a corrugated shape, and arranging these in a plurality of rows.

The frame 1 is, as shown in FIG.
Square frame body 11 made of 00 aluminum alloy
Is clad with a brazing material 12 made of JIS4004 alloy or 4045 alloy.

The frame 1 can be formed by an extruder shown in FIG. That is, as shown in FIG. 4, a billet 13 in which a cylindrical brazing sheet 15 made of a 4004 alloy or a 4045 alloy is coated on the peripheral surface of a cylindrical block 14 of a 6000 series aluminum alloy having excellent extrudability.
Is set in the extruder shown in FIG. That is, the billet 13 is charged into the container 18 and the dummy block 1
The stem 17 is pushed into the container 18 via 6. A die 19 supported by a die slide 20 is disposed between the container 18 and the press platen 21.
And directly extruded into a hollow shape by a mandrel method, and an extruded shape member 22 is obtained. The extruded member 22 has a cylindrical cross-sectional shape as shown in FIG. Therefore,
By cutting this extruded shape member 22 into a suitable length, the frame 1 shown in FIG. 2 is obtained. On the outer surface of the frame 1, a brazing material 12 from a brazing material sheet 15 is clad on the outer surface of the frame body 11 from the aluminum alloy block 14.

The frame 1, the honeycomb core 2, and the face plates 3, 4 are arranged as shown in FIG. 1, and are charged into a vacuum furnace and heated to a temperature higher than the melting point of the brazing material. This allows
The frame 1, the honeycomb core 2, and the face plates 3, 4 are integrally brazed to manufacture the aluminum honeycomb panel 10. In the honeycomb panel 10 manufactured in this way, since the brazing material 12 exists on the outer surface of the frame 1, a sufficient amount of the brazing material exists between the frame 1 and the face plates 3, 4, and the The frame 1 and the face plates 3 and 4 are joined with high strength and a high joining rate. Further, the frame body 1 and the honeycomb core 2 come into contact with each other on the side surface of the frame body 1 and are joined by the brazing material 12 interposed therebetween, so that the strength of the entire honeycomb panel is further improved.

The present invention is, of course, not limited to the above embodiment. In particular, the composition of the frame body and the brazing material clad thereon, the core material of the face plate and the brazing material clad thereon, and the composition of the core material of the honeycomb core and the brazing material clad thereon are described in the above examples. Of course, it is not limited.

[0017]

Next, the results of actually manufacturing the aluminum honeycomb panel according to the above embodiment and examining the brazing bondability thereof will be described. The frame 1 is provided on the surface of a core material (frame body 11) made of JIS6N01 alloy with JIS4004
This is a clad brazing material 12 made of an alloy. The thickness of the brazing material 12 is 0.15 mm.

As a comparative example, a conventional extruded profile (6N01)
Alloy), and a frame body whose surface was not clad with a brazing material was assembled into a honeycomb panel, and the joining property was examined. Table 1 below shows the brazing joint ratio (area of the brazed sound portion / brazed area) of this example and the comparative example.

[0019]

[Table 1]

As shown in Table 1, the honeycomb panel of the present embodiment is superior in the brazing property to the conventional honeycomb panel.

[0021]

As described above, according to the present invention, since the brazing material is clad on the outer surface of the frame, a sufficient amount of brazing is provided between the frame and the face plate during vacuum brazing. Exists,
The frame and the face plate can be joined with high strength and a high joining rate. Further, since it is not necessary to insert a brazing material sheet or the like between the face plate and the frame as in the related art, in the present invention, the core material of the brazing material sheet does not intervene between the base material and the face plate The frame and the frame are directly joined by the brazing, so that an extremely high joining strength can be obtained. Furthermore, in the present invention, since there is no adhesion failure and assembly failure as in the case of inserting a brazing material sheet, the brazing joining rate is extremely high. Furthermore, in the present invention, since the brazing material is clad on the outer surface of the frame, the brazing material also exists between the honeycomb core and the honeycomb core in contact with the side surface of the frame. For this reason, the frame body and the honeycomb core are brazed by vacuum brazing, and the strength is further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an aluminum honeycomb panel according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the structure of the frame.

FIG. 3 is a view showing an extruder used for the production thereof.

FIG. 4 is a view showing the extrusion raw material in the same manner.

[Explanation of symbols]

 1: Frame 2: Honeycomb core 3, 4: Face plate 11: Frame body 12: Brazing material 13: Billet 14: Aluminum alloy block 15: Brazing material sheet

 ──────────────────────────────────────────────────の Continued on front page (72) Inventor Naofumi Hatayama 1-8-2 Marunouchi, Chiyoda-ku, Tokyo Kobe Steel, Ltd. Tokyo Head Office

Claims (1)

[Claims] 1. An aluminum honeycomb panel in which a pair of aluminum face plates is arranged with a frame body made of an extruded aluminum material and a honeycomb core made of a corrugated aluminum brazing sheet interposed therebetween, and these are assembled by brazing. In the manufacturing method, the face plate uses a brazing material clad on a surface in contact with the frame body and the honeycomb core, and the frame body has a brazing material having a thickness of 0.05 to 0.20 mm on its outer surface. A method for manufacturing an aluminum honeycomb panel, comprising: