JPH07189419A - Manufacture of brazed honeycomb panel - Google Patents

Abstract

PURPOSE:To perform uniform and firm brazing and interjoining of a face sheet and a honeycomb core and the face sheet and a profile by a method wherein a double-sided brazing sheet is located between the face sheet and the profile. CONSTITUTION:A core material is cut to given width and bent and brought into an overlapped state to form a honeycomb core 1. A profile 4 of aluminum is disposed to the side end part of the core 1. A double-sided brazing sheet 6 is located between the face sheets 2 and 3, arranged above and below, and the profile 4 and assembled in the shape of a honeycomb panel. The assembled honeycomb panels are laminated and constrained by a jig and charged in a vacuum furnace and heated to temperature higher than the melt point of a brazing material to effect brazing. Through a heating and brazing work, brazing layers 5 of the face sheets 2 and 3 are molten. The brazing material remains throughout a sufficient width between the face sheet 2 and the core 1 and the face sheet 3 and the core 1 to form a brazed part. In addition of the brazing material layer 5, the sheet 6 is located between the end faces 2, 3 and the profile 4 to form a firm joint.

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, more specifically, an end portion of a honeycomb core formed by bending and superposing an aluminum (including aluminum alloy) sheet or a brazing sheet. The present invention relates to a method for manufacturing a brazed honeycomb panel, in which an aluminum profile is disposed on a core, and face plates made of aluminum brazing sheets are disposed above and below the core and the profile to assemble into a honeycomb panel shape, and heating and brazing are performed.

[0002]

2. Description of the Related Art As shown in FIG. 2, an aluminum brazed honeycomb panel 1 is a laminate in which aluminum face plates 3 and 4 are bonded to the upper and lower surfaces of an aluminum honeycomb core 2. In particular, an aluminum brazed honeycomb panel is obtained by polymerizing a core material made of an aluminum sheet or an aluminum brazing sheet to form a honeycomb core, arranging face plates made of aluminum brazing sheets on both upper and lower surfaces, and brazing as one body. Since it can be welded and can be processed by bending and the like, it has been used in various fields such as construction, vehicles, automobiles and ships.

Conventionally, an aluminum honeycomb panel having a panel thickness (core height) of 20 to 30 mm has been used, but recently, with the expansion of applications of the aluminum honeycomb panel, for example, a panel thickness of 50 to 120 mm. Things are becoming required. When manufacturing such an aluminum panel by brazing, as shown in FIG. 3, a honeycomb core 1 of aluminum is usually used.
The aluminum profile 4 is arranged at the end of the honeycomb, and the face plates made of aluminum brazing sheets having the brazing material layers 5 on the honeycomb core side are arranged on the upper and lower sides to assemble into a honeycomb panel shape and to assemble it in a non-oxidizing furnace such as a vacuum furnace It is heated to a brazing temperature in a furnace with a positive atmosphere and brazed together.

[0004]

In this case, the face plate and the honeycomb core and the face plate and the profile are brazed by the brazing material of the face plate, but the face plate and the honeycomb core are in line contact. On the other hand, since the contact between the face plate and the profile is surface contact, the brazing conditions for obtaining a sufficient brazing joint are different, and usually the brazing between the face plate and the profile is more difficult than the brazing joining of the face plate and the honeycomb core. If the attachment is insufficient and non-uniform, and stress is concentrated on this portion during use, the face plate and the profile will be separated.

The present invention has been made to solve the above-mentioned problems in a brazed honeycomb panel formed by assembling aluminum honeycomb panels and integrally brazing and joining them together. It is an object of the present invention to provide a method for manufacturing a brazed honeycomb panel in which a face plate and a honeycomb core and a face plate and an aluminum profile are uniformly and firmly brazed and joined when assembled in a shape, heated and brazed.

[0006]

A method for manufacturing a brazed honeycomb panel according to the present invention for achieving the above object comprises a step of polymerizing a core material made of an aluminum sheet or an aluminum brazing sheet to form a honeycomb core, A brazed honeycomb panel in which an aluminum profile is provided at the end of the core, face plates made of aluminum brazing sheets are provided above and below the honeycomb core and profile, and assembled into the shape of a honeycomb panel, which is integrated with heating and brazing. In the manufacturing method of (1), the invention is characterized in that a double-sided brazing sheet or a brazing material sheet is inserted between the face plate and the profile, and heating and brazing are performed.

In the present invention, a core material made of an aluminum sheet or an aluminum brazing sheet having a brazing material layer on both sides is cut into a predetermined width, bent and polymerized to form a honeycomb core. Aluminum profiles are arranged at the ends, face plates made of aluminum brazing sheets are arranged at the top and bottom to assemble into a honeycomb panel shape, and the assembled honeycomb panels are generally stacked and restrained with a jig. When heating in a vacuum furnace and heating to a temperature above the melting point of the brazing material and brazing, as shown in FIG. 1, a double-sided brazing sheet or brazing material is provided between the face plates 2 and 3 and the profile 4. Insert the sheet 6. As the brazing sheet, for example, BA24PC (core material 6951 alloy, brazing material 4045 alloy, brazing material clad rate one side 5
%), And a brazing filler metal sheet having a thickness of 0.1 to 0.2 mm, such as 4045 alloy, is used. In this case, as shown in FIG. 1, the profile 4 is formed thinner than the core 1 by the thickness of the brazing sheet or the brazing sheet 6.

By the heating and brazing operations, the brazing material layer 5 of the face plates 2 and 3 is melted, and the brazing material remains with a sufficient width between the face plate 2 and the honeycomb core 1 and between the face plate 3 and the honeycomb core 1. In addition to the brazing material layer 5 of the face plates 2 and 3, a double-sided brazing sheet or a brazing material is also formed between the face plates 2 and 3 and the aluminum profile 4 arranged on the peripheral edge of the honeycomb core 1. Since the sheet 6 is inserted, sufficient brazing and joining are performed to form a strong joining portion.

[0009]

According to the structure of the present invention, when an aluminum honeycomb panel is assembled, heated and brazed to manufacture a brazed honeycomb panel, a face plate and an aluminum profile member provided on the peripheral portion of the honeycomb core are used. Since a double-sided brazing sheet or brazing sheet is inserted between them, when brazing is heated, the brazing material layer of the brazing sheet or the brazing material sheet also melts with the brazing material layer of the face plate to compensate for the lack of braze, Sufficient braze remains between them to form a strong braze joint.

[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 98 mm) are bent, polymerized and arranged in the shape of a honeycomb core with a cell size of 3/4 inch, and an aluminum profile (thickness 97.6 mm) is placed on the periphery of the honeycomb core. The aluminum brazing sheet BA23PC (thickness 1.0 mm, brazing material clad rate) is placed on both sides of the aluminum core and the honeycomb core and the aluminum top and bottom of the aluminum core.
A face plate composed of 5% of a core material 6951 alloy, a brazing material 4045 alloy, and a single-sided clad material was arranged, and assembled into a honeycomb panel shape having a length of 3 m and a width of 1 m. The assembled honeycomb panel is put into a vacuum brazing furnace and heat brazing is performed, and the length is 1 m.
An aluminum honeycomb panel with a width of 1 m and a thickness of 100 mm was manufactured.

After brazing, samples were cut out from the joined aluminum honeycomb panels, and the brazing parts of the face plate and the core and the face plate and the profile were examined, and it was found that sufficient brazing joint parts were formed. Was observed. When a tensile test was performed on the brazed part, it was found that the material part broke and a brazed part with excellent bonding strength was formed.

The same core material as in Example 1 (thickness 0.2 m
m) and the face plate, and without assembling the brazing sheet between the profile and the face plate, assemble them into the honeycomb panel shape of the same size, put them in a vacuum brazing furnace, and heat and braze them. When the brazed portion between the face plate and the profile was investigated for the honeycomb panel manufactured by the above method, there was little residual braze, and a portion which was not sufficiently brazed and joined was observed. When a test piece was cut out from this portion and a tensile test was performed, it fractured at the brazed portion.

[0013]

As described above, according to the present invention, when assembling, heating and brazing an aluminum honeycomb panel, the brazing joining of the face plate and the profile is sufficiently performed like the brazing joining of the face plate and the honeycomb core. The brazing joint having excellent joint strength can be formed over the entire honeycomb panel.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment in which a double-sided brazing sheet or a brazing material sheet is interposed between a face plate and a shape member to be brazed in the present invention.

FIG. 2 is a perspective view in which a part of the honeycomb panel is cut away.

FIG. 3 is a partial perspective view showing a state before assembly of the aluminum honeycomb panel.

[Explanation of symbols]

 1 Honeycomb core 2 Face plate 3 Face plate 4 Aluminum profile 5 Brazing material layer 6 Double-sided brazing sheet or brazing material sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeaki Baba 5-11-3 Shimbashi, Minato-ku, Tokyo Within Sumitomo Light Metal Industries Co., Ltd. (72) Hironori Kondo 5-11-3 Shimbashi, Minato-ku, Tokyo No. Sumitomo Light Metal Industry Co., Ltd. (72) Inventor Keizo Namba 5-11-3 Shimbashi, Minato-ku, Tokyo Sumitomo Engineering Co., Ltd.

Claims (1)

[Claims] 1. A core material composed of a large number of aluminum sheets or aluminum brazing sheets is polymerized to form a honeycomb core, and an aluminum profile is provided at an end of the honeycomb core, and aluminum is provided above and below the honeycomb core and the profile. Assembling a face plate made of a brazing sheet to assemble in the shape of a honeycomb panel, heating and brazing In a method for manufacturing a brazed honeycomb panel, a double-sided brazing sheet or a sheet-shaped brazing material is inserted between the face plate and the profile. A method for manufacturing a brazed honeycomb panel, which comprises heating and brazing.