JP2605509Y2 - Aluminum honeycomb panel - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum honeycomb panel used as a light board, a soundproof wall, or the like, and as a component of transportation equipment such as construction materials, aircraft, and vehicles.

[0002]

2. Description of the Related Art A honeycomb panel has a structure in which face plates are integrated on both sides of a honeycomb core. In the case of aluminum, a honeycomb core and a face plate made of a brazing sheet coated with a core material with a brazing skin material are used. After assembling the honeycomb core and the face plate into a predetermined shape, the honeycomb core and the face plate are brazed. The brazed faceplate has ends extending from the sides of the honeycomb core. An aluminum profile, such as a square pipe, is placed between the extended ends as a reinforcement frame and brazed to the faceplate. The brazing of the frame is often performed simultaneously with the brazing of the honeycomb core and the face plate, in consideration of simplification of the working process.

When the honeycomb core and the frame are brazed to the face plate at the same time, it is necessary to devise a method for adjusting the pressing load. That is, while the honeycomb core is in contact with the face plate at the edge, the frame is in surface contact. Because of this difference in the contact state, it is necessary to set the contact pressure between the frame and the face plate considerably higher than the contact pressure between the honeycomb core and the face plate. However, the application of partially different pressing loads causes the brazing operation to be complicated. In this regard,
Japanese Utility Model Publication No. 2-33980 proposes to reduce the contact area by forming grooves on the surface of the frame that is in contact with the face plate. It is described that the grooved frame is brazed to the face plate by applying substantially the same pressing load as the honeycomb core. The formed groove also functions as a brazing material pool, and also prevents the brazing material from flowing to the external surface and the honeycomb core side.

[0004]

When the contact area of the frame with the face plate is reduced by the groove,
In order to reduce the contact area of the honeycomb core close to the line contact, it is necessary to form the groove with a very high area ratio. Therefore, of course, complicated groove processing is required,
Brazing is rather unstable due to the large number of irregularities on the contact surface of the frame. The present invention has been devised in order to solve such a problem. The surface of the frame facing the face plate is formed of a flat portion and a tapered portion, so that the contact area can be easily and reliably reduced. In addition, it is an object of the present invention to provide a honeycomb panel having good brazing strength and excellent surface properties by providing a space portion acting as a brazing material reservoir between the face plate and the frame.

[0005]

In order to achieve the object, the aluminum honeycomb panel of the present invention has a honeycomb core formed by brazing a plurality of brazing sheets to each other, and a front and rear surface of the honeycomb core. A face plate attached to the honeycomb core, and a frame positioned at an end of the honeycomb core and brazed to the face plate. The surface of the frame facing the face plate includes a honeycomb core near a panel side. And a tapered portion separated from the face plate on the inside or both sides of the flat surface. In the aluminum honeycomb panel according to the present invention, for example, as shown in FIG. 1, a flat portion 6 of a frame 2 is placed at an end of a honeycomb core 1, and the honeycomb core 1 and the frame 2 are sandwiched between face plates 3 and 4. I have. The honeycomb core 1 and the face plates 3 and 4 are usually made of a brazing sheet.

[0006] The honeycomb core 1 is obtained, for example, by interposing a fluoride-based flux and a release material in a staggered manner between the laminated brazing sheets, and after brazing, developing the brazing sheets in the laminating direction. The portion to which the release material is applied becomes, for example, a hexagonal space in a state where the brazing sheet is expanded. As the frame 2 disposed at the end of the honeycomb core 1, a square pipe is used in FIG. However, the present invention is not limited to this, and as long as the strength member has a shape corresponding to the end space defined by the honeycomb core 1 and the face plates 3 and 4, a cross-section of a U-shape, an H-shape or the like is used. A hollow or solid shape member having the following shape can be used for the frame 2. As shown in FIG. 2, the surface of the frame 2 facing the face plates 3 and 4 has a tapered portion 5 and a flat portion 6.
It consists of. The tapered portion 5 is formed on the side of the honeycomb core 1 from the flat portion 6 (FIG. 2) or on both sides of the flat portion 6 (FIG. 3). Since the tapered portion 5 is formed, the gap between the frame 2 and the face plates 3 and 4 increases toward the honeycomb core 1. The tapered portion 5 is attached to the surface of the frame 2 by cutting, pressing, or the like. Alternatively, a profile that is tapered in advance by extrusion may be used as the frame 2.

As shown in FIG. 2, the tapered portion 5 is attached to the surface of the frame 2 facing the face plates 3 and 4 after leaving a flat portion 6 on a part of the outside. Therefore, the mounting stability of the frame 2 with respect to the face plates 3 and 4 is improved by the flat portion 6. The surface of the frame 2 provided with the tapered portion 5 may be a concave or convex surface curved with an appropriate curvature, in addition to a linear inclined surface having a constant inclination angle. The frame 2 having the tapered portion 5 is sandwiched between the face plates 3 and 4 together with the honeycomb core 1 and the load F
And brazing. The area of the frame 2 that receives the load F is greatly reduced by the tapered portion 5 and is substantially at the same level as the load applied to the honeycomb core 1 per unit area, that is, the pressure. Therefore, the honeycomb 1
The honeycomb 1 and the frame 2 can be brazed to the face plates 3 and 4 without changing the load F applied to the frame 2. Most of the applied load F is concentrated on the flat portion 6 of the frame 2, and the face plates 3 and 4 are brought into close contact with the surface of the frame 2 via the flat portion 6. On the other hand, on the honeycomb core 1 side from the flat portion 6, a gap is formed between the frame 2 and the face plates 3, 4 due to the tapered portion 5, serving as a brazing material reservoir 7. Because of this contact state,
Excess brazing material fluidized by heating during brazing
It is accommodated in the brazing material reservoir 7 without oozing out from the joint between the frame 2 and the face plates 3 and 4 and without adhering to the honeycomb core 1.

[0008]

EXAMPLE A core material of aluminum alloy 3003 and a cladding material 4045 on both surfaces were 1.5 mm in thickness and 2 mm in width.
A 0 mm brazing sheet was used as the honeycomb core material. A brazing sheet laminated by alternately applying a fluoride-based flux and a release material was brazed to each other, and then developed in the laminating direction to produce a honeycomb core 1. In the honeycomb core 1, a large number of hexagonal cells each having a side of 7.3 mm stand. This honeycomb core 1 has a length of 960
mm, width 6.35 mm and height 20 mm. The frame 2 disposed at the end of the honeycomb core 1 has a rectangular section having a side of 20 mm and a length of 1000 m.
m and 2000 mm square pipes were used. Frame 2
The surfaces facing each other were tapered in two ways as shown in FIGS. In the case of FIG. 2, the tapered portion 5 having an angle of 1 degree was formed while leaving a flat portion 6 having a width of 3 mm from one end. In the case of FIG. 3, a flat surface 8 having a width of 3 mm is left at the center portion, and a taper portion 5 having an angle of 1 degree is formed toward both side edges. The face plates 3 and 4 have a thickness of 1.5 with an aluminum alloy 3003 as a core material and a cladding material 4045 clad on both sides.
mm brazing sheet was used. The brazing sheet is fitted to the honeycomb core 1 and the frame 2 and has a length of 2 mm.
It was sized to 000 mm and width 1000 mm.

A frame 2 was arranged at an end of a honeycomb core 1, and the frame 2 was sandwiched between face plates 3 and 4. Load F = 350k on the entire surface of the face plates 3 and 4
With g added, set the whole to an inert atmosphere,
Brazing was performed by heating to a temperature of 600 ° C. for 3 minutes. When the honeycomb panel after brazing was observed, the joint between the frame 2 and the face plates 3 and 4 in any of FIGS. 2 and 3 did not detect the outflow of the brazing material, and was in a very good finished state. . Further, when the honeycomb panel was cut and the internal bonding state was investigated, the brazing material pool 7 was observed.
Was found, but no brazing material flowing out to the honeycomb core 1 side from the seam was detected. Moreover,
Both the honeycomb core 1 and the frame 2 were brazed to the face plates 3 and 4 with good joining strength.

[0010]

As described above, in the honeycomb panel of the present invention, the honeycomb panel is disposed at the end of the honeycomb core,
The surface of the frame facing the face plate is formed of a flat portion and a tapered portion. The flat part improves the mounting stability of the frame with respect to the face plate, and the tapered part makes the load required when brazing to the face plate the same level between the honeycomb core and the frame,
Excess brazing material is prevented from seeping out to the side surface of the honeycomb panel and adhering to the honeycomb core. Therefore, a honeycomb panel having good surface properties and excellent bonding strength can be easily and reliably obtained.

[Brief description of the drawings]

FIG. 1 shows a honeycomb panel according to the present invention.

FIG. 2 shows a honeycomb core and a frame in contact with a face plate.

FIG. 3 shows another example using a frame with a different taper.

[Explanation of symbols]

1: Honeycomb core 2: Frame 3, 4: Face plate 5: Tapered portion 6: Flat portion 7: Brazing material pool

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akio Matsunaga 1-34-1 Kambara, Kambara-cho, Anbara-gun, Shizuoka Pref. Nikkei Giken Co., Ltd. 2-33980 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 B21D 47/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A honeycomb core formed by brazing a plurality of brazing sheets to each other, a face plate brazed on the front and back surfaces of the honeycomb core,
A frame positioned at an end of the honeycomb core and brazed to the face plate; and a surface of the frame opposed to the face plate, near a panel side.
A flat surface that is in surface contact with the honeycomb core by the side, and the flat surface
A tape that is separated from the face plate on the inside or on both sides of the
Aluminum honeycomb panels over path portion is formed.