JPH07197596A - Method for manufacturing curved honeycomb panel - Google Patents

Abstract

(57) [Summary] [Structure] In a method for manufacturing a curved honeycomb panel by bending an aluminum honeycomb panel in which aluminum face plates are provided above and below a honeycomb core formed of an aluminum sheet, both end portions of the honeycomb panel are manufactured. The honeycomb panel is bent by winding the honeycomb panel around the curved surface of a winding jig having a curved surface while applying a tensile force to the. [Effect] Bending can be performed with a small radius of curvature without causing buckling of the face plate.

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 a curved honeycomb honeycomb panel, and in particular, by bending a flat honeycomb panel under specific conditions, it is possible to bend the face plate with a small radius without buckling. And a method for manufacturing a curved honeycomb panel.

[0002]

2. Description of the Related Art An aluminum honeycomb panel 1 is shown in FIG.
As shown in FIG. 3, the aluminum honeycomb core 2 is a laminated body formed by joining the upper and lower surfaces of the aluminum honeycomb face plates 3 and 4 of the aluminum. Particularly, an aluminum brazed honeycomb panel in which face plates made of aluminum brazing sheets are provided on the upper and lower surfaces of a honeycomb core formed by polymerizing core materials made of an aluminum sheet or an aluminum brazing sheet and integrally brazed and joined. Since it can be welded and can be processed by bending and the like, it has been used as a welded structure in various fields such as construction, vehicles, automobiles and ships.

Usually, as shown in FIG. 7, a brazed honeycomb panel in which a frame member 5 made of an aluminum profile having various cross-sectional shapes is arranged at a side end of the honeycomb core 2 for practical use is used. Has been done. A general manufacturing example of such a brazed honeycomb panel is to cut a core material made of an aluminum sheet or an aluminum brazing sheet provided with a brazing material on both sides into a predetermined width to form a regular hexagonal half shape. Aluminum that is folded and formed by stacking folded aluminum sheets or aluminum brazing sheets into the shape of a honeycomb core, arranging aluminum profiles at the side ends of the honeycomb core, and brazing material on the top and bottom of the core This is carried out by disposing a face plate made of a brazing sheet, assembling it into the shape of a honeycomb panel, restraining it, charging it in a furnace, heating it, and integrally brazing and bonding it.

When such a brazed honeycomb panel is actually used as a welded structure, a curved honeycomb panel is required in addition to the planar honeycomb panel. Conventionally, in order to form a curved panel, a method of forming a flat honeycomb panel in advance and bending it with three rolls, four-point bending, or bending with a forming press into a curved panel is generally used. Has been. However,
It is difficult to perform bending with a small radius of curvature by these methods, and for example, R / H ≧ 50 even with a four-point bending method.
(However, R is the radius of curvature, and H is the thickness of the honeycomb panel) is the limit of bending, and there is a problem that when a bending process larger than this is performed, the face plate on the compression receiving side is buckled.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems in the case where a flat aluminum honeycomb panel is formed into a curved honeycomb panel by bending. Provided is a method for manufacturing a curved honeycomb panel, which is capable of forming a curved panel by bending a honeycomb panel, particularly a brazed honeycomb panel, with a radius of curvature smaller than conventional without buckling the face plate. It is in.

[0006]

A method for manufacturing a curved honeycomb panel according to the present invention for achieving the above object is an aluminum honeycomb panel in which aluminum face plates are provided above and below a honeycomb core formed of an aluminum sheet. In the method of manufacturing a curved honeycomb panel by bending, the bending is performed by winding the honeycomb panel around the curved surface of a winding jig having curved surfaces while applying tensile force to both ends of the honeycomb panel. It is a feature of.

At both ends of the honeycomb panel to which a tensile force is applied, pulling plates having a width substantially the same as the width of the honeycomb panel at the ends and having a thickness substantially equal to or greater than the thickness of the face plate are attached, Bending the honeycomb panel by winding the honeycomb panel around the curved surface of the winding jig while applying a tensile force to both ends of the honeycomb with the pulling plate, and an aluminum shape whose one end is arranged at the end of the honeycomb panel. The draw plate engaged with the frame member made of a material is hung along the outer peripheral portion of the arc-shaped pulling direction changing metal fitting, and the other end is attached to the draw frame arranged below the winding jig. By moving the draw frame downward, the honeycomb panel is wound around the curved surface of the winding jig while applying a tensile force to both ends of the honeycomb panel through the draw plate.
It is a feature of.

In the present invention, as shown in FIG. 1, the honeycomb panel 1 is placed on a winding jig 6 having a curved surface portion 7 and a tensile force T is applied to both ends of the honeycomb panel 1,
The honeycomb panel 1 is bent by applying a reaction force N directed upward to the jig 6 and winding the honeycomb panel 1 around the curved surface portion 7 of the jig 6. This bending method can prevent buckling of the face plate 4 on the compression side. In this case, the aluminum alloy face plate is preferably bent in a solution-treated soft state, and then, after a step such as welding, T6 treatment is performed if necessary.

2 to 4 show specific modes of bending the honeycomb panel. A pulling plate 8 for applying a tensile force is attached to both ends of the honeycomb panel (length L, width B, thickness H) placed on the winding jig 6. The pulling plate 8 has approximately the same width as the width B of the honeycomb panel 1 at both end portions of the honeycomb panel 1 and has a thickness substantially equal to or greater than the thickness of the face plate. For example, as shown in FIG. The metal fitting 9 is attached to the above by means of welding W or the like, and this metal fitting 9 is engaged with the frame member 5 made of an aluminum shape member arranged at the end of the honeycomb core 2. The honeycomb panel 1 is arranged on the receiving plate 10 via a sliding plate 11 made of a carbon plate or the like in order to reduce friction during bending. 1
Reference numeral 2 is a holding metal fitting for pressing the metal fitting 9 attached to the end of the pulling plate 8 from below to ensure the engagement with the frame material 5, and is fixed to the receiving plate 10 by means such as welding or screwing. Has been done.

As shown in FIG. 2, the pulling plate 8 whose one end is engaged with the frame member 5 of the honeycomb panel 1 through the metal fitting 9 has an arc-shaped tensile force direction changing metal fitting (radius r) 13 as shown in FIG. Is hung along the outer periphery of the winding jig 6, and the other end is attached to the draw frame 14 arranged below the winding jig 6. Pulling plate 8 and pulling frame 14
3, the pulling pipe 16 is fixed to the lower end portion of the pulling plate 8 by means such as welding, and the pulling rod 17 is inserted into the pulling pipe 16. It is connected to the draw frame 14 via an attachment 18 fixed to the draw frame 14. When the pull rod 17 is inserted, the pull rod 17 is housed in the pull pipe 16, and the pull rod 17 is attached to the pull pipe 16.
It is constructed so that it can be easily removed from the pulling tube 16. Reference numeral 15 is a hydraulic jack arranged between the draw frame 14 and the receiving frame 19.

With the above structure, when one end of the pulling plate 8 is attached to both ends of the honeycomb panel 1 placed on the winding jig 6 and the hydraulic jack 15 is operated, the winding jig 6 is pushed upward. As a result of pulling both ends of the honeycomb panel 1 by the pulling plate 8, a tensile force is applied to the honeycomb panel 1 and a reaction force is applied from the lower side, and the honeycomb panel 1 is, as shown by the one-dot chain line in FIG. Bending is performed with the radius of curvature R of the curved surface 7 of the winding jig 6. The pulling plate 8 is pulled downward along the outside of the arc-shaped pulling direction changing fitting 13 to give a tensile force to the honeycomb panel.
If the radius r of 3 is too small, the pulling plate 8 is plastically deformed, so the radius r is preferably 20 times or more the thickness of the pulling plate 8.

[0012]

According to the structure of the present invention, since bending is performed by winding a honeycomb panel on a curved surface while applying a tensile force to the honeycomb panel, a large bending can be given to the face plate located on the compression side without buckling. Is possible. The tensile force on the honeycomb panel is applied by a pulling plate having a width substantially the same as the width of the honeycomb panel at the pulling end and a thickness that is substantially the same as or greater than the thickness of the face plate, and the pulling plate moves downward through the pulling direction change fitting. Since the winding jig is pulled up and the winding jig is pushed upward, the honeycomb panel is wound along the curved surface of the winding jig and effectively bent.

[0013]

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
The alloy, the double-sided clad material, and the sheet width of 58 mm) were folded, and the folded brazing sheet was polymerized to form a honeycomb core having a cell size of 3/4 inch. Aluminum profiles are arranged at the side edges of the honeycomb core, and aluminum brazing sheets BA23PC (thickness 1.2 mm, brazing material clad ratio 5
%, Core material 6951 alloy, brazing material 4045 alloy, single-sided clad material)
The honeycomb panel is assembled in the shape of a honeycomb panel by arranging a face plate made of, and the assembled honeycomb panel is brazed by holding it in a vacuum brazing furnace at 600 ° C for 5 minutes to obtain a length of 10
An aluminum honeycomb panel of 00mm, width 50mm, and thickness 60mm was manufactured.

The manufactured honeycomb panel was bent according to the bending method shown in FIG. 2 using a winding jig having a curved surface with a radius of curvature of 1000 mm. FIG. 5 shows the relationship between the tensile force T and the inclination angle ψ with the progress of bending in this case. The honeycomb panel was in close contact with the winding jig, and the bending process proceeded without buckling the honeycomb face plate.

[0015]

As described above, according to the present invention, a flat honeycomb panel can be bent with a small radius of curvature without causing buckling of the face plate, and the conventional bending limit R / H ≧ 50 can be significantly eased.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a basic aspect of bending processing of a honeycomb panel in the present invention.

[Fig. 2] Fig. 2 is a front view showing an embodiment of a bending method of a honeycomb panel according to the present invention.

FIG. 3 is a partial side view of FIG.

[Fig. 4] Fig. 4 is a partial cross-sectional view showing an embodiment of a connecting system between the honeycomb panel and the draw plate in Fig. 2.

FIG. 5 is a graph showing the relationship between the tensile force and the inclination angle in the bending process of the honeycomb panel of the present invention.

FIG. 6 is a perspective view showing a honeycomb panel by cutting out a part thereof.

[Fig. 7] Fig. 7 is a cross-sectional view of a honeycomb panel in which a frame member is arranged at an end of a core.

[Explanation of symbols]

 1 Honeycomb panel 2 Honeycomb core 3 Face plate 4 Face plate 5 Frame material 6 Winding jig 7 Curved surface part 8 Drawing plate 9 Metal fitting 10 Support plate 11 Sliding plate 12 Holding fitting 13 Pulling direction changing fitting 14 Drawing frame 15 Hydraulic jack 16 Drawing tube 17 Pull bar 18 Fixture 19 Receiving frame T Tensile force N Reaction force W Weld

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masanobu Yoshichiro 5-11-3 Shimbashi, Minato-ku, Tokyo Inside Sumikari Engineering Co., Ltd.

Claims (3)

[Claims] 1. A method for manufacturing a curved honeycomb panel by bending an aluminum honeycomb panel having aluminum face plates provided above and below a honeycomb core formed of an aluminum sheet, wherein a tensile force is applied to both ends of the honeycomb panel. A method of manufacturing a curved honeycomb panel, which comprises bending the honeycomb panel by winding the honeycomb panel around the curved surface of a winding jig having a curved surface while being applied. 2. A pulling plate having substantially the same width as the width of the honeycomb panel at the end and having a thickness substantially equal to or greater than the thickness of the face plate is attached to both ends of the honeycomb panel to which tensile force is applied, and The method for manufacturing a curved honeycomb panel according to claim 1, wherein the honeycomb panel is bent by winding the honeycomb panel around a curved surface of a winding jig while applying a tensile force to both ends of the honeycomb panel with a pulling plate. 3. A pulling plate, one end of which is engaged with a frame member made of an aluminum mold material, which is arranged at an end of a honeycomb panel,
It is hung along the outer circumference of the arc-shaped pulling direction changing metal fitting, the other end is attached to the draw frame arranged below the winding jig, and the draw frame is moved downward to pass through the draw plate. A method for manufacturing a curved honeycomb panel, which comprises winding and bending the honeycomb panel around a curved surface of a winding jig while applying a tensile force to both ends of the honeycomb panel.