JP2842985B2 - Manufacturing method of 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 a method for manufacturing a honeycomb panel used as a structural member for vehicles, ships, buildings, and the like.

[0002]

2. Description of the Related Art Aluminum brazed honeycomb panels have the advantages of light weight and high strength, and are widely used as structural members for vehicles, ships, buildings and the like. This type of aluminum brazed honeycomb panel is manufactured, for example, as follows.

[0003] First, a long thin plate member is formed into a square wave shape to obtain a square wave formed plate (hereinafter, referred to as a honeycomb core) having a convex surface and a concave surface alternately. Then, the plurality of honeycomb cores are arranged so that the convex surface and the concave surface of the adjacent honeycomb cores are overlapped to form a hexagonal column-shaped honeycomb cell. Next, two face plates having one surface side clad with a brazing material are prepared. Then, the honeycomb core is sandwiched between these face plates in the axial direction of the honeycomb cell to obtain an assembly. In this case, the face plate is arranged with the surface on the brazing material side inward. Next, the assembly is heated to melt the brazing material, and the honeycomb core and the face plate are integrally brazed. Thereby, the honeycomb panel is completed.

[0004] A hole for ventilation is provided in a non-overlapping surface (inclined surface) between the convex surface and the concave surface of each honeycomb core,
It has been proposed to prevent the occurrence of inconveniences such as deformation of the honeycomb core and poor brazing by making the pressure in each cell equal to the pressure of the external atmosphere during heating (Japanese Patent Application Laid-Open No. 62-21945).

However, in the above-described method for manufacturing an aluminum brazed honeycomb panel, the alignment of the honeycomb core is likely to be disturbed at the time of assembling the honeycomb core, and it is difficult to accurately overlap the convex surface and the concave surface. There is a problem that defects and brazing defects at overlapping portions between cores are likely to occur. In particular, in the conventional method for manufacturing a honeycomb panel, the honeycomb cells are likely to be displaced in the axial direction, causing brazing failure between the face plate and the honeycomb core. Therefore, as a method of regularly aligning the honeycomb cores, a method of inserting a long bolt through the honeycomb core and fixing each honeycomb core with the bolts and nuts (Japanese Patent Laid-Open No. 3-297632), a method of forming the honeycomb core with convex and concave surfaces. (Japanese Patent Application Laid-Open No. 4-75729) and a method of mechanically connecting and fixing the overlapping portions of the convex and concave surfaces of the honeycomb core with a special press (Japanese Patent Application Laid-Open No. 4-75731). Has been proposed.

[0006]

However, the above-described methods of fixing the honeycomb core such as mechanical connection by bolts, nuts, staples and presses require a long work time for assembling the honeycomb core due to poor workability. There is a problem that it is not a target. In addition, since the gas flow path formed by the ventilation holes provided on the non-overlapping surface is inclined with respect to the arrangement direction of the honeycomb cores, the length of the gas flow path becomes longer, the ventilation resistance becomes larger, There is also a disadvantage that the effect of making the pressure in the cell equal to the pressure of the external atmosphere cannot be sufficiently obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to regularly align honeycomb cores, to form honeycomb cells accurately, and to perform brazing at overlapping portions between honeycomb cores. An object of the present invention is to provide a method for manufacturing a honeycomb panel in which defects are less likely to occur.

[0008]

A method of manufacturing a honeycomb panel according to the present invention comprises forming a plurality of square wave-shaped plates having a convex surface and a concave surface alternately in the form of a square wave into one convex surface and the other concave surface. In a honeycomb panel manufacturing method of manufacturing a honeycomb panel by arranging and overlapping these square wave shaped plates between a pair of face plates, a projection is provided on one of the convex surface and the concave surface, and the projection is provided on the projection. Is the central part
A through-hole for ventilation is provided, and a fitting hole is provided on the other side, and the plurality of square wave forming plates are arranged by fitting the protrusions into the fitting holes. I do.

[0009]

In the present invention, a plurality of square wave forming plates are arranged by fitting projections provided on one of the convex surface and the concave surface of the square wave forming plate into fitting holes provided on the other. . This makes it possible to regularly align the square-wave formed plates, thereby preventing poor brazing and poor honeycomb cell shape. As described above, in the present invention, the square wave forming plates are regularly aligned by fitting the projections into the fitting holes, and thus, the method of fixing the square wave forming plate by a conventional bolt, nut, stapler, special press, or the like. Workability is better than

Further, since the ventilation holes in the central portion of the projection is provided, reduces the gas flow path as compared with the case where the ventilation holes are formed in only the non-overlapping surface, the ventilation resistance decreases Become. Thereby, air permeability is improved, and the pressure in each honeycomb cell during brazing can be made equal to the pressure of the external atmosphere. As a result, it is possible to suppress inconveniences such as poor brazing and peeling of the square wave formed plate and the face plate in a high-temperature environment.

Further, when the square wave forming plates are fixed to each other by crushing the tip of the projection fitted in the fitting hole, the fitting between the projection and the fitting hole is completed before brazing. It is possible to prevent the two pieces from coming off from each other, and it is possible to more reliably align and fix the square wave forming plates. For this reason, it is preferable to fix the square wave forming plates to each other by crushing the tip of the projection fitted in the fitting hole.

Further, by forming a ventilation hole (second ventilation hole) on the non-overlapping surface, the ventilation between the honeycomb cells is further improved, and the pressure balance between the honeycomb cells can be improved. Uniformity can be ensured more reliably. Also, for example, even if the brazing material clad on the face plate flows to block one vent hole, the air permeability is not blocked. For this reason, it is preferable to provide ventilation holes also on the non-overlapping surface of each square wave forming plate.

[0013]

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view showing a method for manufacturing a honeycomb panel according to a first embodiment of the present invention. First,
A plurality of honeycomb cores 1a and 1b are prepared. These honeycomb cores 1a and 1b are formed by forming a thin plate member into an angular wave shape, and have convex surfaces 12 and concave surfaces 13 provided alternately. The honeycomb cores 1a and 1b are provided, for example, on one surface side of a plate-shaped material made of a 6951 alloy.
It is clad with a 04 alloy brazing material. Each convex surface 12
Is provided with a flange (protrusion) 2 having a height of 0.5 to 2 mm formed by drawing by a press or the like, and each concave surface 13 is provided with a fitting hole 3 formed by punching or the like. ing. The diameter of the fitting hole 3 is, for example, 1 to 3 mm, and is set slightly larger than the diameter of the flange 2.

Next, the honeycomb cores 1a and 1b are assembled by fitting the flange 2 of each convex surface 12 and the fitting hole 3 of each concave surface 13 together. FIG. 2 is a schematic perspective view showing a fitting portion between the flange 2 and the fitting hole 3. Honeycomb core 1b
Hole 3 provided in the concave surface 13 of the honeycomb core 1a in which the flange 2 provided in the convex surface 12 is disposed adjacently.
Fits. As shown in FIG. 2, a ventilation hole 2 a penetrating from the front side to the back side is provided at the center of each flange 2. As shown in FIG. 1, a ventilation hole 4 is formed in one of two non-overlapping surfaces 14 (a surface between the convex surface 12 and the concave surface 13) sandwiching the convex surface 12. The shape of the flange 2 is not particularly limited, and may be a cylindrical shape, a conical shape, or another shape.
Thus, the honeycomb cores are combined by fitting the flanges 2 of the convex surface 12 and the fitting holes 3 of the concave surface 13 to form a hexagonal column-shaped honeycomb cell as shown in FIG.

Next, an assembly of the honeycomb core and the face plate is obtained by sandwiching the aggregate of these honeycomb cores from both sides in the axial direction of the honeycomb cell with a pair of face plates. The face plate is formed, for example, by cladding a plate material made of 6951 alloy on one surface side with a 4004 alloy brazing material.

Next, after attaching a heating jig to the assembly, the assembly is heated, for example, in a vacuum. This allows
The brazing material clad in the honeycomb core and the face plate is melted, and each honeycomb core and the face plate are integrally brazed to complete the honeycomb panel.

In this embodiment, the flange 2 provided on the convex surface 12 of the honeycomb core is fitted into the fitting hole 3 provided on the concave surface 13 of another honeycomb core to combine a plurality of honeycomb cores. And the concave surface can be reliably avoided. For this reason, the workability is extremely good as compared with the conventional method of fixing the honeycomb core with a bolt and nut, a stapler, a special press, and the like, and the shape of the honeycomb cell is poor and the brazing of the overlapping portion between the convex and concave surfaces is poor. Can be avoided. Further, in this embodiment, the ventilation holes 2a and 4 are provided in each of the flanges 2 and the non-overlapping surface 14, respectively, so that the air permeability between the honeycomb cells is extremely good, and the brazing and the high temperature environment can be obtained. In this case, it is possible to avoid deformation, bonding failure and peeling of the honeycomb cells.

An aluminum brazing panel was actually manufactured by the above-described method, and the shape of the honeycomb cells, the bonding state between the honeycomb cores, and the bonding state between the honeycomb core and the face plate were examined. Each of the honeycomb core and the face plate is formed by forming a clad material in which a brazing material of 4004 alloy is clad on one surface side of a plate material made of 6951 alloy. As a result, each of the honeycomb cells had a predetermined hexagonal shape. In addition, the bonding state between the honeycomb cores and the bonding state between the honeycomb core and the face plate were good, and no problems such as peeling were observed.

FIGS. 4 and 5 are schematic perspective views showing a method of manufacturing a honeycomb panel according to a second embodiment of the present invention in the order of steps. FIG. 6 is a cross-sectional view showing a fixed state of the honeycomb cores.

First, as shown in FIG. 4, a plurality of honeycomb cores in which convex surfaces 32 and concave surfaces 33 are alternately continuous are prepared. Each convex surface 32 of these honeycomb cores is provided with a flange 22 having a height of 1 mm or more formed by drawing by pressing or the like, and each concave surface 33 has a fitting hole 23 formed by punching or the like. Is provided. The diameter of the fitting hole 23 is, for example, 1 to 3 mm, and is set slightly larger than the diameter of the flange 22. The shape of the flange 22 is not particularly limited, and may be, for example, a cylindrical shape or a conical shape, and the height of the flange 22 is 1 mm or more. The flange 22 is provided with a ventilation hole penetrating from one surface side to the other surface side along the center axis. Further, one of the two non-overlapping surfaces 34 sandwiching each convex surface 32 has a hole 24 for ventilation.
Is provided. Then, as shown in FIG. 4, the respective honeycomb cores are assembled by fitting the flange 22 and the fitting hole 23 together.

Next, as shown in FIG. 5, the honeycomb cores are fixed to each other by crushing the tip of the flange 22 fitted in the fitting hole 23 as shown by reference numeral 25 (see FIG. 6). ).

Next, as in the first embodiment, a set of these honeycomb cores is sandwiched from both sides in the axial direction of the honeycomb cells by a pair of face plates having one surface clad with a brazing material, and is used for heating. After attaching the jig, the honeycomb core is heated in a vacuum to braze the honeycomb core and the face plate. This allows
The honeycomb panel is completed.

In this embodiment, in addition to obtaining the same effects as those of the first embodiment, each of the flanges 22 is fitted into the fitting hole, and the tip of the flange 22 is crushed. After the honeycomb core is fixed, the face plate is brazed, so that it is possible to more reliably avoid the misalignment of each honeycomb core, and it is possible to reliably prevent the brazing failure due to the misalignment of the honeycomb core. .

An aluminum brazing panel was actually manufactured by the above-described method, and the shape of the honeycomb cells, the bonding state between the honeycomb cores, and the bonding state between the honeycomb core and the face plate were examined. The honeycomb core and the face plate were 6
A plate material made of 951 alloy is formed by forming a clad material in which one surface side is clad with a 4004 alloy brazing material. As a result, each of the honeycomb cells had a predetermined hexagonal shape. Also, the bonding state between the honeycomb cores and the bonding state between the honeycomb core and the face plate were good, and no poor brazing was observed.

[0026]

As described above, according to the present invention, a plurality of protrusions provided on one of the convex surface and the concave surface of the square wave forming plate are fitted into the fitting holes provided on the other. Since the square wave forming plates are arranged, it is easy to assemble the square wave forming plates regularly and each honeycomb cell can be formed in a predetermined shape, and it is possible to avoid a joint failure between the square wave forming plates. it can. Therefore, according to the method of the present invention, there is an effect that a high-quality honeycomb panel can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a method for manufacturing a honeycomb panel according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a fitting portion between a flange and a fitting hole.

FIG. 3 is a schematic cross-sectional view showing a state where honeycomb cores are combined.

FIG. 4 is a schematic perspective view showing one step of a method for manufacturing a honeycomb panel according to a second embodiment of the present invention.

FIG. 5 is a schematic perspective view showing other steps in the same manner.

FIG. 6 is a cross-sectional view showing a fixed state of the honeycomb cores.

[Explanation of symbols]

 1a, 1b; honeycomb cores 2, 22; flanges 2a, 4, 22a, 24; ventilation holes 3, 23; fitting holes 12, 32; convex surfaces 13, 33; concave surfaces 14, 34;

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshihiko Sasaki 14-1, Chofu Minatomachi, Shimonoseki City, Yamaguchi Prefecture Kobe Steel, Ltd. Chofu Works (56) References JP-A-4-294832 (JP, A) ( 58) Field surveyed (Int. Cl. ⁶ , DB name) B21D 47/00

Claims (3)

(57) [Claims] 1. A plurality of square wave shaped plates formed in a square wave shape having a convex surface and a concave surface alternately are arranged such that one convex surface and the other concave surface are overlapped with each other. In the honeycomb panel manufacturing method for manufacturing a honeycomb panel sandwiched between face plates, a projection is provided on one of the convex surface and the concave surface, and the projection penetrates a central portion thereof.
The fitting hole is provided on the other side, and the plurality of square wave forming plates are arranged by fitting the protrusion into the fitting hole. A method for manufacturing a honeycomb panel. 2. The method for manufacturing a honeycomb panel according to claim 1, wherein each of the square wave forming plates is fixed to each other by crushing a tip end of the projection fitted in the fitting hole. 3. A according to claim 1 or 2, characterized in that non-overlapping in plane second vent hole between said concave surface and said convex surface of said angle wave forming plate is drilled A method for manufacturing a honeycomb panel.