JPH0550169A - Honeycomb core - Google Patents

Abstract

PURPOSE:To form a honeycomb core of a hollow columnar shape of a polygon by forming a slit of a prescribed shape in a face joined part of a band plate, and fitting each slit to each other. CONSTITUTION:A honeycomb core is constituted of plural band plate 3A-3G, and in the band plate 3, a hold 5A of a crest shape, a fold 5B of a valley shape and a slit 7 are formed. The slit 7 is formed to the center part along the fold 5A. Also, the band plate 3, each slit 7 is fitted to each other and assembled, a honeycomb shape is constituted, brazing is executed, and the honeycomb core is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb core in which cells having a polygonal hollow columnar shape are assembled.

[0002]

2. Description of the Related Art Conventionally, as a honeycomb core, corrugated aluminum or aluminum alloy strips are arranged one by one in a frame material to form a set of cells having a hexagonal hollow columnar shape. There are brazed sides of each cell.

In such a honeycomb core, a honeycomb structure in which hexagonal cells are arranged in order is ideal in terms of strength.

[0004]

However, as shown in FIGS. 19 (A), (B), and (C), the honeycomb core having the conventional corrugated strips arranged side by side has the following structure. In some cases, the core of Example 1 was displaced in the longitudinal direction or the stacking direction, and an accurate hexagonal hollow columnar shape was not formed in some cases. Therefore, there has been a problem that desired mechanical strength cannot be obtained. Moreover, when the hexagonal hollow columnar shape was not accurately formed, the side surfaces of the cells were not surface-bonded but point-bonded, resulting in a decrease in mechanical strength.

Further, in the case of a honeycomb core used for a honeycomb panel without a frame material, it is essential to use a special jig for fixing the end of the core. An object of the present invention is to solve the above problems and provide a honeycomb core in which a set of polygonal hollow columnar cells is accurately formed.

[0006]

As a means for achieving the above object, the honeycomb core of the present invention comprises a combination of strip plate members made of aluminum or aluminum alloy to constitute a set of polygonal hollow columnar cells. In addition, in the honeycomb core in which the cell has at least one surface-bonding portion with another cell, and the surface-bonding portion is brazed, the band plate member faces the surface-bonding portion. A slit having a predetermined shape is formed in the strip plate, and the slits are fitted to each other in the strip plate members.

[0007]

In the honeycomb core of the present invention, since the strip plate members are fitted together by the slits, the strip plate members do not shift in the length direction and the stacking direction. Therefore, the polygonal hollow columnar shape is accurately formed.

Further, since the slits are fitted to each other at the position facing the surface-bonding portion, the surface-bonding portion between the cells is surely brought into close contact with each other. Therefore, brazing is reliably performed between the cells.

[0009]

EXAMPLES Next, examples of the honeycomb core of the present invention will be described. 1 is an explanatory view of the structure of the honeycomb core 1 of the first embodiment, FIG. 2 is a perspective view of the assembled state of the honeycomb core 1, and FIG. 3 is a plan view of the assembled state of the honeycomb core 1.

As shown in FIG. 1, the honeycomb core 1 has a plurality of strip plate members 3A, 3B, 3C, 3D, 3E, 3F, 3G.
(Hereinafter, simply referred to as 3 if there is no particular need to distinguish them). The band plate member 3 has a wall thickness of 0.2 [m
m] and a height of 13 [mm] made of a strip-shaped aluminum brazing sheet. The band plate member 3 is formed with a mountain-shaped fold line 5A, a valley-shaped fold line 5B, and a slit 7. The space between the folds 5A and 5B is set to a value at which the cell size becomes "3/4"".

The slit 7 is formed up to the central portion along the fold line 5A. The slit 7 of the strip members 3A, 3B, 3C is formed from one end 7A. The slits 7 of the strip members 3D, 3E, 3F, 3G have one end 7B.
Are formed from. The slit width D7 has the same value as the wall thickness (here, 0.2 [mm]).

As shown in FIG. 1, the strip plate member 3 is assembled by fitting the slits 7 together. That is,
The first slit 7A1 of the strip plate member 3A and the first slit 7D1 of the strip plate member 3D are fitted together, and the first slit 7B1 of the strip plate member 3B and the second slit 7D2 of the strip plate member 3D.
And are fitted together. Others are fitted in the same manner.

When the fitting of the band plate members 3 to each other is completed, a honeycomb shape as shown in FIGS. 2 and 3 is formed. After forming the honeycomb shape, the band plate members 3 are brazed to each other at their contact surfaces 9 to complete the honeycomb core 1.
In the state shown in FIGS. 2 and 3, since the slits 7 of the strip plate members 3 are fitted to each other, the strip plate members 3 are assembled without displacement. This gives 6
A honeycomb structure is formed in which cells in the shape of hollow prisms are arranged in an orderly manner.

Further, since the fitting portions 11 of the slits 7 are located at the outer edge portions of the contact surfaces 9 of the strip plate members 3, the contact surfaces 9 of the strip plate members 3 are surely brought into surface contact. This ensures brazing of the band plate members 3 to each other. In the honeycomb core 1 described above, since the honeycomb structure is accurately formed and the strip plate members 3 can be reliably joined to each other, a desired design strength can be surely obtained and the manufacturing quality can be maintained in a high state. It has an extremely excellent effect of being able to.

Further, the band plate member 3 can be assembled without fixing the end portion of the honeycomb core 1. Even in the case of the honeycomb core 1 used for a honeycomb panel without a frame material, a special jig is used. You don't have to. Furthermore, the disturbance of the honeycomb core during and after the assembly is reduced, and a precise cell-shaped panel can be manufactured. Further, the honeycomb core is not disturbed even when the panel without the outer frame is manufactured. Therefore, it is possible to manufacture a panel in which the honeycomb core has less disorder and the mechanical properties are stable. Moreover, as an additional effect, since the honeycomb core is not disturbed during the assembling, the assembling work is facilitated and the assembling time is shortened. As a result, automation is extremely easy. Further, since there is no disturbance of the honeycomb core after assembly, the occurrence of defects due to transportation and the like is suppressed, and the yield is improved. Since the honeycomb core is less disordered and is orderly at the time of brazing, the gap between the strip plate members is minimized, and the brazing property is improved.

Next, a change in characteristics caused by changing specifications of each part of the honeycomb core 1 will be described. Effect of the width of the slit 7: The width of the slit 7 depends on the width of the strip member 3.
It has a great influence on the brazability of each other. For example, if the width of the slit 7 is large, the brazing material that has melted does not fill part or all of the slit 7 during brazing, and brazing is completed with each side of the cell not growing. There is a case that it ends up. Table 1 below shows the test data of the strength according to the bonding rate of each side of this cell.

[0017]

[Table 1]

As shown in the comparative value of the mechanical properties depending on the joining state of the slits 7 in Table 1, the compressive strength, the flatwise tensile strength and the shear strength are extremely lowered even if the joining ratio is lowered. There is no. Limitation of application by changing the width of the slit 7: When the space between adjacent cells is expanded through the slit 7, the width of the slit 7 may be increased, or the width of the slit 7 may be increased.
You can increase the length of.

(1) When the width of the slit 7 is widened to allow communication between adjacent cells, the experimental value exceeds the value obtained by adding 0.6 mm to the plate thickness of the strip plate member 3. The result has been obtained that the width of the slit 7 should be set. (2) When the length of the slit 7 is increased to allow communication between adjacent cells, as an experimental value, a length equal to or greater than 0.2 [mm] added to half the height of the strip plate member 3. The result is that the length of the slit 7 should be determined.

The above condition (1) or (2) can achieve the purpose by performing one or both of the treatments. In this case, JP-A-62-2194
It is not necessary to open the vent hole as shown in Japanese Patent Publication No. 5 publication, but when it is desired to increase the vent area, for example, the slit width or the slit length is not further increased, and You may open the ventilation hole separately in the part.

To completely eliminate communication between cells,
The width of the slit 7 under the condition (1) described above, that is, a value obtained by adding 0.6 [mm] to the plate thickness of the strip plate member 3 may be set. Further, it may be shorter than the length of the slit 7 of the condition (2), that is, a length obtained by adding 0.2 [mm] to half the height of the strip plate member 3.

Next, a second embodiment will be described. Figure 2 is the second
FIG. 5 is an explanatory view of the structure of the honeycomb core 21 of the embodiment, and FIG. 5 is a perspective view of the assembled state of the honeycomb core 21. The honeycomb core 21 includes a plurality of strip plate members 23A, 23B, 23C,
23D, 23E, 23F, 23G (hereinafter, simply referred to as 23 unless otherwise specified).

The strip plate member 23 is the strip plate member 3 of the first embodiment.
It has almost the same material, size, and shape. Strip member 23
Has a fold line 25, a slit 27, and a fold line 28. The slit 27 is formed at an intermediate portion between the fold line 25 and the fold line 25. Specifications of the slit 27, such as length and width, are determined based on the conditions shown in the first embodiment. The fold line 28 is formed along the extension line of the slit 27.

The band plate member 23 is assembled by fitting the slits 27 together. FIG. 5 shows a state after the assembling. As a result, the honeycomb core 21 in which the portions corresponding to the sides of the cells are fitted together by the slits 27 is configured. As a result, the honeycomb structure is accurately formed, and the band plate members 23 can be reliably joined together.

Next, a third embodiment will be described. FIG. 6 is an explanatory view of the structure of the honeycomb core 31 of the third embodiment, and FIG. 7 is a perspective view of the assembled state of the honeycomb core 31. The honeycomb core 31 is a combination of the honeycomb core 1 of the first embodiment and the honeycomb core 21 of the second embodiment.

That is, the honeycomb core 31 has a plurality of strip plate members 33A, 33B, 33C, 33D, 33E, 33.
F, 33G (only 3 if there is no need to distinguish below
3)). The band plate member 33 is
A fold line 35, a slit 36, a slit 37, and a fold line 38 are provided. The fold line 35 is for forming a cell shape. The slits 36 are formed at the corners of the cells, and the slits 37 are formed at the portions that correspond to the sides of the cells. The fold line 38 is formed along the extension line of the slit 37.

In the honeycomb core 31, both the corners of the cells and the portions corresponding to the sides of the cells are fitted by the slits 36 or 37, so that the honeycomb structure is accurately formed and the band plate members 33 are in contact with each other. The entire surface of is closely attached. Therefore, according to the present embodiment, there is an extremely excellent effect that the honeycomb core 31 with which the design strength can be reliably obtained can be obtained with a simple and easy manufacturing method.

Next, a modification of the first, second or third embodiment will be described. 8 is a perspective view of the strip plate member 41, and FIG. 9 is a perspective view of the strip plate member 41 in an assembled state. Strip member 4
1 has folds 43 and 45 and slits 47 and 49.

As shown in FIG. 9, the strip plate member 41 is assembled from the end in order. As a result, a honeycomb structure in which the honeycomb shapes are regularly arranged can be obtained. Therefore, the assembling work can be easily performed. The following modification will be described. 10 is a perspective view of the strip plate member 51, and FIG. 11 is a perspective view of the strip plate member 53. The strip plate member 51 has a slit 55 and an insertion piece 56. The strip plate member 53 has a slit 57 and an insertion piece 58. Slit 5 of strip member 51
By successively inserting the insertion pieces 56 located between the slits 5 between the slits 57 of the strip plate member 53, a honeycomb structure in which honeycomb shapes are arranged in an orderly manner can be obtained.

The following modification will be described. FIG. 12 is a perspective view of the strip plate member 61. The strip member 61 includes a slit 63,
65, a fold line 67, and insertion pieces 68 and 69. The slits 63 and 65 are formed in the portions that correspond to the sides of the cells. The fold line 67 is formed along the extension line of the slits 63 and 65. By inserting the insertion pieces 68 of one strip plate member 61 between the slits 65 of the other strip plate members 61 one after another, a honeycomb structure in which honeycomb shapes are arranged in order is obtained.

The following modification will be described. FIG. 13 is a perspective view of the strip plate member 71. The strip plate member 71 is formed by inserting strips 68, 69 of the strip plate member 61 with shorter lengths.
Is equipped with. The other structure is almost the same as that of the strip plate member 61. By doing so, the band plate members 71 can be easily assembled with each other, and the assembling efficiency is improved.

The following modification will be described. FIG. 14 is a perspective view of the strip plate member 81. The strip plate member 81 includes the insertion pieces 88, 8
9 is equipped. The insertion piece 88 is formed between the slits 85 formed on the side of the lower end portion 82 to the upper end portion 83. The insertion piece 88 reaches the lower end portion 82. The insertion piece 89 is formed between the slits 86 formed from the upper end portion 83 to the lower end portion 82 side. The insertion piece 89 is cut into a predetermined length. By doing so, the band plate members 81 can be easily assembled with each other, and the assembling efficiency is improved.

The following modification will be described. FIG. 15 is a perspective view of the strip plate member 91. The strip plate member 91 includes slits 95,
96 and insertion pieces 98 and 99. Slit 9
5, 96 are formed to be longer than half the height 91H of the strip plate member 91. Thereby, ventilation between cells can be achieved.

The following modification will be described. FIG. 16 is a perspective view of the strip plate member 101. The strip member 101 has a slit 1
02, insertion piece 103, insertion hole 105, and insertion recess 1
07 and. In this case, by inserting the insertion pieces 103 of the other strip plate members 101 one after another into the insertion holes 105 of one strip plate member 101, a honeycomb structure in which honeycomb shapes are arranged in order is obtained.

The following modification will be described. FIG. 17 is a perspective view of the strip plate member 111. The strip member 111 has the slit 1
12, insertion piece 113, insertion hole 115, insertion recess 1
17 and 17. This is because a honeycomb structure in which honeycomb shapes are arranged in order is obtained by successively inserting the insertion pieces 113 of the other strip plate members 111 into the insertion holes 115 of one strip plate member 111.

The following modification will be described. FIG. 18 is a perspective view of the strip plate member 121. The strip member 121 has the slit 1
23 and 125 and insertion pieces 127 and 129 are provided. This is because by inserting the insertion pieces 127 of one strip plate member 121 into the slits 125 of the other strip plate member 121 one after another, a honeycomb structure in which honeycomb shapes are arranged in order is obtained.

The present invention is not limited to the above embodiments, and various embodiments can be carried out without changing the gist of the present invention.

[0038]

In the honeycomb core of the present invention, the slits are fitted to each other, whereby the polygonal hollow columnar cells are formed in an accurate shape without shifting in the longitudinal direction or the stacking direction. As a result, there is an extremely excellent effect that the desired design strength is surely obtained.

Moreover, since the shape of the formed cells is maintained without shifting in the longitudinal direction or the stacking direction, it is possible to prevent the core from being disturbed after the assembling. Therefore,
The number of man-hours for curing and transporting the core so as not to cause disorder and for assembling it to the panel becomes unnecessary, and the number of manufacturing steps can be reduced.

Since the cells are surely surface-bonded to each other, a desired design strength can be surely obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a structure of a honeycomb core 1.

FIG. 2 is a perspective view of an assembled state of the honeycomb core 1.

FIG. 3 is a plan view of an assembled state of the honeycomb core 1.

FIG. 4 is an explanatory diagram of a structure of a honeycomb core 21.

FIG. 5 is a perspective view of an assembled state of the honeycomb core 21.

FIG. 6 is an explanatory diagram of a structure of a honeycomb core 31.

FIG. 7 is a perspective view of an assembled state of the honeycomb core 31.

8 is a perspective view of a strip plate member 41. FIG.

9 is a perspective view of an assembled state of the strip plate member 41. FIG.

10 is a perspective view of a strip plate member 51. FIG.

11 is a perspective view of a strip plate member 53. FIG.

12 is a perspective view of a strip plate member 61. FIG.

FIG. 13 is a perspective view of a strip plate member 71.

14 is a perspective view of a strip plate member 81. FIG.

15 is a perspective view of a strip plate member 91. FIG.

16 is a perspective view of the strip plate member 101. FIG.

FIG. 17 is a perspective view of a strip plate member 111.

FIG. 18 is a perspective view of a strip plate member 121.

FIG. 19 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1, 21, 31, 41 ... Honeycomb cores 3A to 3G, 23A to 23G, 33A to 33G, 41,
51, 53, 61, 71, 81, 91, 101, 11
1, 121 ... Strip plate members 5A, 5B, 25, 35, 43, 45, 67 ... Fold lines 7, 27, 36, 37, 47, 55, 63, 65, 8
5,86,95,96,102,112,123,12
5 ... slit

Claims (1)

[Claims] 1. An aluminum or aluminum alloy band plate member is combined to form a set of polygonal hollow columnar cells, and the cells have at least one surface-bonding portion between them. In the honeycomb core having the surface-bonding portions brazed together, the strip plate member has slits of a predetermined shape formed at positions facing the surface-bonding portions, and the slits of the strip plate members are fitted to each other. Honeycomb core characterized in that