JP2684092B2 - Honeycomb material and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a honeycomb material.

More specifically, the present invention relates to a high-quality honeycomb material suitable for forming a complicated curved surface such as a cubic curved surface, and a method for manufacturing the honeycomb material.

"Prior art" and "Problems to be solved by the invention" Generally, since a honeycomb material has features such as easy forming and the highest weight specific strength, a substantially regular hexagon formed by a stretch forming means. The thing which consists of a plane suitable assembly of the shape of a hollow pillar-shaped cell is often used. However, when forming a curved honeycomb material from such a honeycomb material, for example, when the honeycomb material is curved along the curved surface shape in the expansion direction (or in the direction orthogonal to the expansion direction, so-called ribbon direction),
The direction orthogonal to the expansion direction (or ribbon direction) of the honeycomb material, that is, the ribbon direction (or expansion direction), warps upward in the opposite direction, distorts into a saddle shape, does not fit to the curved surface type, and applies an excessive force to this. However, if a cell wall is attempted to be fitted, the cell wall may be deposited and the bonded portion of the cell wall may be peeled off, so that a highly accurate curved honeycomb material cannot be formed.

Therefore, as a honeycomb material that can be easily processed into a curved surface and can form a high-quality curved honeycomb material, for example, as shown in FIG. A honeycomb material made of a metal made of a planar aggregate of, a honeycomb material suitable for forming a curved honeycomb material formed by further expanding a predetermined amount in the expansion direction, that is, each cell 21 Rectangular cells in which the bending angles of the cell walls 22 and 23 forming the
A so-called over-expanded core 20 composed of 21 plane-suitable aggregates. Alternatively, as shown in FIG. 8, the metallic base sheets 31 formed in a predetermined corrugated shape are sequentially arranged so that the concave portions 32 and the convex portions 33 of the adjacent base sheet 31 correspond to each other. The concave portions are arranged in a positional relationship of abutting with each other.
32 and the abutting portion of each convex portion 33 are joined via an adhesive 35 or the like,
The so-called flexible core 30 and the like formed by stacking the base material sheets 31 have been provided.

However, in the former case, the cell walls 23 of low strength are continuously located in a straight line along the spreading direction W, and the cell walls of high strength which are positioned along the ribbon direction L.
Since the cells 22 are displaced by 1/2 of the cell size S in the spreading direction W, for example, when curved along the curved surface type in the ribbon direction L, the distance between the cell walls 22 in each cell 21 is increased. Does not change on the concave curved surface side or the convex curved surface side in the spreading direction W, but shrinks on the concave curved surface side between the ribbon directions L and changes so as to open on the convex curved surface side. With such a change in the distance between the cell walls 22 in the ribbon direction L, the expansion direction W
The cell walls 23 located along the line are displaced at a large interval, particularly at the center of the cell size S direction, by being greatly contracted on the concave curved surface side and being twisted and deformed to open on the convex curved surface side. By the way, these twisting deformations of the cell walls 23 are mostly absorbed by the elastic deformations of the metal base sheet forming the cell walls 23, and breakage of the cell walls 23, peeling at the joints of the cell walls 22, etc. It has a characteristic that it can be easily fitted to a curved surface type without causing a situation that the expansion direction W warps back. On the other hand, on the other hand, when the cell wall 23 is bent in the extending direction W, the cell wall 23 is located in a substantially straight line in the extending direction W, and the state exists in the shape of a single plate. Since it has a high bending rigidity to be pressed, it is extremely difficult to form a curved honeycomb material curved in the spreading direction W. Therefore, such over-expanded core 20
In, it was not possible to form a honeycomb material having a complicated curved surface such as a high quality cubic curved surface.

Further, the latter is extremely flexible, and it is easy to form a honeycomb material having a complicated curved surface such as a cubic curved surface, but the base material sheets 31 formed in a predetermined corrugated shape are sequentially stacked to form Therefore, there are drawbacks that the molding is extremely troublesome and the flexible core 30 becomes expensive, and in particular, the strength of the joint portion is inferior as compared with, for example, the over-expanded core 20 and the like.

Therefore, in order to solve the problems of the over-expanded core 20, the flexible core 30 and the like, there is provided a honeycomb material for forming a curved surface made of metal, which is made of a planar aggregate of cells having a substantially flat drum shape.

In this honeycomb material 40 for forming a curved surface, as shown in FIG. 9, each cell 41 having a substantially hourglass shape in plan has a cell wall 42 forming an end face in the expansion direction W of the cell 41 located along the ribbon direction L. Are brought into contact with each other and are joined together via an adhesive 45 or the like, so that they are arranged in series along the spreading direction W, and to each of the cells 41 arranged in one of the series. On the other hand, the other cells 41 arranged in series adjacent to each other in the direction orthogonal to the extending direction W (ribbon direction L) are alternately arranged in the extending direction W by 1 / the cell size S.
They are arranged so that they are offset by two.

Therefore, in this curved surface forming honeycomb,
In order to form a curved honeycomb material, for example, when curved in a spreading direction W along a curved mold, the strength of the two cell walls 42 located along the ribbon direction L in each cell 41 is high. The distance between the extending directions W of the cell walls is changed so that the concave curved surface side contracts and the convex curved surface side opens. With the change in the interval between the spreading directions W of the high strength cell walls, each of the low strength cell walls 43 made of a single base sheet located in a zigzag shape along the spreading direction W has the same distance. However, in particular, in the constricted portion 44, the shrinkage occurs on the concave curved surface side and changes while causing a twisting deformation so as to open on the convex curved surface side. By the way, since the twisting deformation of these cell walls 43 is almost absorbed by the elastic deformation of the metal base sheet forming the cell walls 43, the cell walls 43 are broken or the joint portion of the cell walls 42 is broken. Fitting to an easily curved surface type without peeling or the like. Therefore, the curvature in the extending direction W is large, and
A high quality curved honeycomb material can be formed.

Further, when curved in the expansion direction W, in the constricted portion 44 of each cell 41, the interval between the cell walls 43 is reduced on the concave curved surface side,
Since each cell wall 43 changes while twisting and deforming so as to open on the convex curved surface side, the curved honeycomb material curved in the expansion direction W naturally curves in the ribbon direction L by a predetermined amount as in the expansion direction W. It transforms to do. Therefore, it is possible to easily form a curved honeycomb material having a complicated curved surface such as a high-quality cubic curved surface.

However, the honeycomb material 40 for forming a curved surface, which is formed by a planar assembly of the cells 41 having a substantially flat drum shape, compresses the conventional over-expanded core 20 in the ribbon direction L by any method, and the state of the over-expanded core 20 is obtained. In, in each cell 41, a cell wall 43 of a small strength made of a single base material that is positioned in a straight line along the spreading direction W is
Although it is possible to perform molding by bending so as to be close to each other along the connection portion with the high-strength cell wall 42 located along the ribbon direction L, it is simply compressed in the ribbon direction L. Then, for example, it is almost impossible to form the honeycomb material 40 in which the cells 41 located in all the parts have a uniform and substantially hourglass shape without distinction between the central portion and the peripheral edge portion, and therefore, the high-quality honeycomb material. In order to form 40, for example, the air in each cell 21 of the overexpanding core 20 is uniformly sucked to expand the W direction.
Along the cell walls 23 that were located substantially parallel to each other,
At the center of each cell 21 in the extending direction W, the cells 21 are formed so as to be displaced so as to be close to each other, and a load is uniformly and gradually applied in the ribbon direction L. Therefore, it has been pointed out that the molding is extremely troublesome and the cost is high because a special molding device is required for the molding. Further, particularly in the case where the honeycomb material 40 to be formed has a large size, the shapes of the cells 41 located in the central part and the cells 41 located in the peripheral part are formed even when formed using a special forming device. It has been pointed out that since it is difficult to form a high-quality honeycomb material 40, such as that the pieces are likely to be uneven, the size that can be formed is naturally limited.

The present invention has been made in view of the above circumstances, and an object of the present invention is that a special molding device is not required, a high quality product can be easily molded, and A honeycomb which is also excellent in strength and is capable of easily forming a high quality product even in the case of a particularly large size. For example, a honeycomb suitable for forming a honeycomb material having a complicated curved surface such as a cubic curved surface. The purpose is to propose a material and a manufacturing method thereof.

"Means for Solving the Problem" The present invention has been made to achieve the above object, and the technical means for solving the problems are as follows.

The metallic honeycomb material according to the first aspect is a planar aggregate of hollow columnar cells formed by the expansion forming means.

Each cell of this honeycomb material is in a plane,
The distance between the center parts in the expansion direction is substantially along the direction orthogonal to the expansion direction (so-called ribbon direction) and is longer than the length of the cell walls forming the end faces in the expansion direction of the cells facing each other. In addition, it has a substantially V-shape that is symmetrically bent with the center in the extending direction as a boundary.

Then, each of the cells having the substantially V shape is arranged in series along the spreading direction by aligning the bending directions and abutting the cell walls forming the end faces of each other in a corresponding manner, and Each cell arranged in series in one adjacent to the ribbon direction, and each cell arranged in the other series, the bending direction is opposite to each other,
The cell walls are arranged in a positional relationship in which they are alternately displaced by ½ of the cell size in the spreading direction, and the respective cell walls abutting each other corresponding to each other are bonded via a bonding material such as an adhesive. Has become.

Next, the method for manufacturing a honeycomb material according to the second aspect includes the following steps.

That is, first, a bonding material layer forming step is appropriately performed, and a predetermined number of metal base materials on one surface of which a bonding material layer such as an adhesive is formed in a linear shape having a predetermined pitch and a predetermined width. Sheets are prepared, and then, the predetermined number of base material sheets are sequentially stacked so that the bonding material layers are alternately displaced from the center between the pitches, and the base material sheets are stacked. The honeycomb material laminated body is formed by superposing by adhering at each position of each of the bonding material layers, and then, the honeycomb material laminated body is bonded directly or in the striation shape. After being cut into a predetermined length in a direction orthogonal to the layers, a tensile force is applied in the stacking direction of the base material sheets to once form the base material sheet having the shorter distance between the bonding material layers. Overrun until the cell wall is in a substantially straight line along the spreading direction. And then bending the cells by uniformly applying a predetermined load to the honeycomb material formed by the over-expansion and compressing the honeycomb material in a direction orthogonal to the expansion direction (so-called ribbon direction). Has become.

"Operation" Since the honeycomb material and the method for manufacturing the same according to the present invention are composed of the above means, they operate as follows.

In the metallic honeycomb material according to claim 1, the cells forming the honeycomb material and having a substantially V-shape in a plane are aligned in the bending direction, and the end faces of the cells in the expanding direction that abut against each other are aligned. Join the cell walls to be formed via a joining material,
The cells arranged in series along the spreading direction, and the cells arranged in series adjacent to each other in the ribbon direction have bending directions opposite to each other, and The cells are arranged in a positional relationship in which the cell sizes are alternately shifted by 1/2. Therefore, the cell wall of each cell located in a continuous state in the spreading direction, that is, the cell wall having a small strength made of one base material sheet located between the bonding material layers during the formation of the honeycomb material laminate is zigzag. It is located in a shape. In addition, the cell wall of each cell located substantially along the ribbon direction, that is, the cell wall with high strength composed of two cell walls joined to each other, is
The cells are alternately displaced by two, and in the ribbon direction, they are located in a straight line with the center of the cell in the expansion direction, which is adjacent to the ribbon direction, that is, the bent portion of the cell. ing.

Therefore, when this honeycomb material is now curved in the expanding direction along a curved surface type, for example, cell walls located substantially along the ribbon direction in each cell, that is, two cell walls are bonded via a bonding material. The interval in the expansion direction of the cell walls having a high strength formed by joining by means of the joining changes so as to shrink particularly on the side in contact with the curved mold, that is, on the concave curved surface side. Moving to the transition of the high-strength cell wall located substantially along the ribbon direction in each such cell, the low-strength cell wall consisting of one base sheet located in a zigzag shape along the spreading direction is particularly , At the bent part of each cell,
On the side in contact with the curved surface type, that is, on the concave curved surface side, the cells both undergo twisting deformation in a direction in which they are significantly bent, and the cells are displaced. By the way, since the twisting deformations of the cell walls having a small strength located in zigzag along the spreading direction are almost absorbed by the elastic deformation of the metal base sheet forming these cell walls, The cell wall of small strength located in a zigzag shape is broken, or
There is no occurrence of a situation such as peeling of the joint portion of the cell wall having a high strength located substantially along the ribbon direction, and it is easy to fit the curved surface type.

Further, when curved along the curved surface mold in the ribbon direction, the cell walls with high strength located substantially along the ribbon direction in each cell have a space in the spreading direction that is in contact with the curved surface mold. That is, the concave curved surface side and the opposite side thereof, that is, the convex curved surface side, do not change on either side, but in the ribbon direction, the interval shrinks on the concave curved surface side and shifts to open on the convex curved surface side. With the change in the spacing in the ribbon direction of the high-strength cell wall located substantially along such a ribbon direction, the small-strength cell wall located in a zigzag shape along the spreading direction in each cell,
In particular, in the bent portion of the cell, the space is significantly contracted on the concave curved surface side and is displaced while causing twisting deformation so as to open on the convex curved surface side. By the way, since the twisting deformation of the cell walls located along the expansion direction is almost absorbed by the elastic deformation of the gold-made base sheet forming these cell walls, it is similar to the case of bending in the expansion direction. The cell wall located along the spreading direction is not broken, and the joint portion of the cell walls located substantially along the ribbon direction is not peeled off.

Therefore, it is possible to easily form a high-quality honeycomb material having a complicated curved surface such as a cubic curved surface.

Further, in the method for manufacturing a honeycomb material according to the present invention of claim 2, through a bonding material layer forming step in the honeycomb material forming step by the conventional general expansion forming means,
On one surface thereof, a predetermined number of metal base sheets having a predetermined pitch and a predetermined width of the bonding material layer are formed, and the formed bonding material layers are alternately arranged between the pitches. Of the honeycomb material laminated body is formed by stacking the laminated base material sheets in a positional relationship slightly displaced from the center of the honeycomb material laminated body, and the honeycomb material laminated body is formed on the bonding material layer as necessary. After cutting in a direction perpendicular to each other at a predetermined length, a tensile force is applied in the direction in which the base material sheets are stacked, and once the cell wall formed by the base material sheet on the side where the distance between the bonding material layers is short is , Over-expanded along the expansion direction until it becomes a substantially straight line state, and then this over-expanded honeycomb material,
A honeycomb material is formed by uniformly applying a predetermined load in the ribbon direction and compressing it to bend each cell.

Therefore, in the method for manufacturing a honeycomb material according to the present invention, the forming means in the steps from the step of forming the bonding material layer on the base material sheet to the over-expansion of the honeycomb material laminate is When the base sheets are stacked on each other to form the body, the base sheets can be formed by substantially the same forming means as the conventional overexpanding core, although the means for overlapping the base sheets is slightly different.

The honeycomb material formed by this over-expansion has a cell wall formed by the base material sheet while the distance between the bonding material layers is short at the stage of the honeycomb material laminated body, and the cell walls are positioned in a substantially straight line along the expansion direction. In addition, the cell wall formed by the base material sheet on the side where the distance between the bonding material layers is long is bent at the center of each cell in the expansion direction, and is located in a zigzag shape in the expansion direction. . In addition, the cell wall with high strength that forms the end face in the expansion direction of the cells located substantially along the ribbon direction formed by joining the base material sheets to each other has a cell size of 1/2 of the cell size in the expansion direction.
The cells are alternately displaced from each other, and in the ribbon direction, they are respectively located on a substantially straight line with a center portion in the spreading direction of the cells adjacent to the ribbon direction separated.
See figure).

Then, in the next step, in the next step, the honeycomb material is uniformly compressed by applying a predetermined load, so that the cell walls with high strength located substantially along the ribbon direction are mutually separated. By moving along the ribbon direction so as to be close to each other, the restoring force that the cell wall positioned in the zigzag shape along the spreading direction has is promoted, and this cell wall becomes larger in the state of the base sheet. With the transition to the springback direction, the length of the honeycomb material in the ribbon direction is reduced, so that the cell walls that were located in a substantially straight line along the expansion direction are A cell located in the central portion opposite to the cell wall and in a zigzag shape along the extending direction, which is bent in a mountain shape with the central portion as an apex. They are bent respectively along the side edges of the large cell walls of intensity located along the ribbon direction so as to be drawn in the direction. As a result, the cell wall, which was once located in a straight line along the expansion direction in the over-expanded state, is positioned in a bent state opposite to the cell wall at the center of the expansion direction in all cells. Since the restoring force of the cell wall and the distance between the cell walls located along the ribbon direction are all shifted so that they are close to each other, the cells are bent at approximately the same angle, so the shape of each cell is approximately the same. It is possible to obtain a high-quality honeycomb material composed of a planar aggregate of cells having a substantially V-shaped plane.

Therefore, since it can be easily molded by adding only a step of uniformly applying a predetermined load in the ribbon direction to the step of molding which is substantially the same as the step of molding a conventional overexpanded core, it is possible to form the conventional planar It was necessary at the stage of molding a honeycomb material for forming a curved surface from an overexpanded core, such as a honeycomb material for forming a curved surface formed of a planar aggregate of hourglass-shaped cells. No special molding device is required, and in particular, even in the case of a large size, a high quality honeycomb material can be easily molded.

"Example" Hereinafter, the present invention will be described based on the example shown in the drawings.

 First, the honeycomb material of claim 1 will be described.

FIG. 1 is a plan view of an essential part of a honeycomb material according to the present invention,
2 and 3 are explanatory views showing a state in which a curved honeycomb material is formed by using the honeycomb material according to the present invention. FIG. 2 is a plan view of a main part, and FIG. , Second
FIG. 3 is a sectional view taken along the line III-III in the figure.

In the figure, reference numeral 1 is a honeycomb material formed by a stretch forming means described later, and the honeycomb material 1 is as follows. That is, each cell 2 of this honeycomb material 1 is
In each plane, the distance between the central portions in the extending direction W, that is, the distance between the central portions in the cell size S direction is
Is formed longer than the length of the cell wall 3 forming the end face of the cell 2 in the extending direction W of the cells 2 that are parallel to and facing each other in the direction orthogonal to the direction L, and each of these cells 2 is formed in a substantially V shape symmetrically bent with the center in the cell size S direction as a boundary.

The cells 2 having the substantially V shape are arranged in series along the expansion direction W by aligning the bending directions and abutting the cell walls 3 forming the end faces in the expansion direction W in a corresponding manner. ing. Further, the cells 2 arranged in series along the spreading direction W adjacent to the ribbon direction L are arranged in series on one side and the cells 2 arranged in series on the other side. The cell 2 and the cell 2 have bending directions opposite to each other, and the cells 2 are alternately displaced in the spreading direction W by 1/2 of the cell size S, that is, one of the cells arranged in series. One end of the cell wall 3 in each of the cells 2 arranged in series on the other side is arranged in the bent portion 4 of the cell 2 in a positional relationship. Then, in each of the cells 2 arranged in this way, the corresponding cell wall 3 that abuts is adhered to the adhesive material 5.
They are connected to each other via a cell wall 6 having a high strength, which is composed of two cell walls 3 which are formed by adhering each other through the cell walls.

Reference numerals 7 and 8 denote one cell wall and the other cell wall, respectively, which form an end face of each cell 2 in the spreading direction W, and both cell walls 7 and 8 are located adjacent to each other in the ribbon direction L. Each cell 2 also serves as one of the cell walls 7 and the other cell wall 8 forming the end face of the cell 2 in the extending direction W, and each cell 2 is bent in the same direction at different angles at its center. The bent portion 4 of each cell 2 is formed here. The two cell walls 7 and 8 are positioned in a zigzag continuous manner along the spreading direction W.

In addition, 11 is a base material sheet which forms the cell wall 3, one cell wall 7, and the other cell wall 8, and S is the cell size of the cell 2.

 The honeycomb material 1 has such a structure.

Therefore, as shown in FIGS. 2 and 3, when the honeycomb material 10 of the curved surface material is formed using the honeycomb material 1 according to the present invention, for example, the honeycomb material 1 is curved in the expansion direction W along the curved surface mold 9. At this time, the expansion direction W of the high-strength cell wall 6 formed by adhering the two cell walls 3 that are parallel to each other and face each other along the ribbon direction L in each cell 2 with the adhesive 5 The interval of is changed so as to shrink particularly on the side in contact with the curved surface mold 9, that is, on the concave curved surface side 10a. Along with the displacement of the cell wall 6 having a large strength, one base sheet positioned in a zigzag shape along the spreading direction W.
One cell wall 7 made of 11 (see FIG. 1) and having low strength
The cell wall 8 on the other side and the cell wall 8 on the other side in particular change at the bent portion 4 of each cell 2 while undergoing torsional deformation in the direction in which the cell 2 is further bent at the concave curved surface side 10a.
By the way, the torsional deformation of the one cell wall 7 and the other cell wall 8 positioned in a zigzag shape along the spreading direction W is
Almost all of them are absorbed by the elastic deformation of the metal base sheet 11 forming the cell walls 7 and 8. Therefore, the one cell wall 7 and the other cell wall 8 are broken, or
The bonded portion of the cell wall 6 having a high strength located along the ribbon direction L is not peeled off, and is easily fitted to the curved surface mold 9.

Further, when curved in the ribbon direction L along the curved surface mold 9, the interval between the cell walls 6 having high strength located along the ribbon direction L in each cell 2 becomes concave in the expansion direction W. Curved surface side 10a and the opposite side, that is,
Although it does not change on the convex curved surface side 10b or on either side, in the ribbon direction L, the distance decreases on the concave curved surface side 10a and changes so as to open on the convex curved surface side. Along with the displacement of the cell wall 6 having a high strength, the one cell wall 7 and the other cell wall 8 having a low strength, which are located in a zigzag shape along the spreading direction W, are spaced apart from each other particularly at the bent portion of the cell 2. In 4,
It contracts remarkably on the concave curved surface side 10a and undergoes twisting deformation so as to open on the convex curved surface side 10b and shifts. By the way, the torsional deformation of the one cell wall 7 and the other cell wall 8 located in a zigzag shape along the spreading direction W is almost caused by the metal base sheet 11 forming the cell walls 7 and 8. Since it is absorbed by elastic deformation, the cell wall 7 on one side and the cell wall 8 on the other side are not broken or the adhesive portion of the cell wall 6 having high strength is not peeled off, as in the case of being bent in the extending direction W. , Easily fit on the curved surface mold 9.

Therefore, it is possible to easily form a high-quality honeycomb material 10 having a complicated curved surface such as a cubic curved surface.

Next, a method for manufacturing the honeycomb material according to claim 2 will be described.

FIG. 4 is a plan view of the base material sheet with an adhesive applied, FIG. 5 is a front view showing a step of forming a honeycomb material laminate, and FIG. 6 is an overexpanded state. FIG. 3 is a plan view of a main part showing the honeycomb material of FIG.

First, for example, an adhesive application means (not shown) is appropriately provided on one surface of a long metal base material sheet such as an aluminum alloy foil which is continuously transferred via an appropriate transfer means (not shown).
Thus, for example, in order to position the applied adhesive agent 5 along the longitudinal direction of the long base material sheet, the adhesive agent 5 is applied in the widthwise direction at a predetermined application pitch P in a stripe shape of a predetermined width. By cutting the long-length base sheet that has been uno'ed in the longitudinal direction at a predetermined length along the width direction, as shown in FIG. 4, at a predetermined coating pitch P in the width direction. Then, a base sheet 11 is formed in which the adhesive 5 is applied in a linear shape having a predetermined width along the longitudinal direction.

Next, as shown in FIG. 5, the adhesive 5 applied to the base material sheet 11 is applied to every predetermined number of the base material sheets 11 thus formed from the center position of the application pitch P. Positions slightly displaced, that is, the length of P ₁ is slightly shorter than 1/2 of the coating pitch P, and the length of P ₂ is shorter than 1/2 of the coating pitch P. Alternately, the base sheets 11 to which the adhesive 5 is not applied are piled up alternately in a long positional relationship, and a predetermined number of the base sheets 11 thus laminated are pressed and heated. By adhering the base sheets 11 adjacent to each other at the position of the adhesive 5 applied on the surface of one base sheet 11 respectively, a predetermined number of base sheets 11 are superposed. A honeycomb material laminate 12 is formed. In order to form the honeycomb material 1 having a desired cell size S, the base material sheet 11 is used when forming the honeycomb material laminate 12.
When the adhesive sheets 5 applied to the base material sheet 11 are shifted and positioned when overlapping, the honeycomb material 1 to be formed
Cell size S, etc., for example, to form a honeycomb material 1 having a cell size S of about 21 mm, a base material sheet coated with an adhesive 5 with a coating pitch P of 48 mm and a coating width of 12 mm. When the honeycomb material laminate 12 is formed of 11, the base sheet 11 has P ₁ of 23 mm and P ₂ of 25 mm.
The target honeycomb material 1 can be formed by stacking the layers.

The honeycomb material laminated body 12 thus formed,
Next, the base sheet 11 is cut at a predetermined length in a direction orthogonal to the adhesive portion located directly or in a line, that is, a direction orthogonal to the adhesive 5 applied to the material sheet 11. Formed by a base sheet 11 on the P ₁ side, that is, a single base sheet 11 with a short distance between the adhesives 5, by applying a tensile force in the stacking direction, that is, in the spreading direction W. One of the cell walls 7 forming the end face on the shorter side of the cell 14 located along the expansion direction W is over-expanded by being over-expanded along the expansion direction W until it is in a substantially straight line state. The honeycomb material 13 in the open state is formed.

By the way, this over-expanded honeycomb material
As shown in FIG. 6, the reference numeral 13 indicates one end face in the spreading direction W of each cell 14 formed by the base material sheet 11 on the side where the distance between the adhesives 5 is short at the stage of the honeycomb material laminate 12. The one cell wall 7 to be formed is located in a substantially straight line shape along the spreading direction W, and the base sheet 11 on the side where the distance between the adhesives 5 facing the one cell wall 7 is long. The other cell wall 8 forming the other end face in the expansion direction W of each cell 14 formed by
That is, the cells are bent at the same angle at the center in the cell size S direction, and are positioned in a zigzag continuous manner along the spreading direction W. Further, the strength formed by the two cell walls 3 forming the end faces in the spreading direction W of the cells 14 which are formed by adhering the base sheet 11 to each other through the adhesive 5 and are arranged along the ribbon direction L. The cell walls 6 having a large size are alternately displaced by 1/2 of the cell size S in the spreading direction W, and in the ribbon direction L, the cell sizes of the cells 14 adjacent to each other in the ribbon direction L direction. They are located on a straight line with the center part in the S direction separated,
It also consists of a planar aggregate of cells 14 of modified pentagonal shape.

Then, in the next step, the honeycomb material 13 in the over-expanded state is once uniformly compressed in the ribbon direction L by applying a predetermined load. Then, the cell walls 6 having high strength, which are located along the ribbon direction L, are displaced along the ribbon direction L so as to be close to each other, and are mainly located in the zigzag shape along the spreading direction W. The restoring force possessed by the other cell wall 8 is promoted, and the other cell wall 8 is displaced to a state in which it springs back to the state of the base material sheet 11 at the time of the honeycomb material laminate 12 to a larger extent. At the same time, at the same time, due to the length of the honeycomb material 13 in the over-expanded state being reduced in the ribbon direction L, the one cell wall 7 that was positioned in a substantially straight line along the expansion direction W was formed. Is located at the center of each cell 14 in the cell size S direction facing the one cell wall 7 and is bent in a mountain shape with the center in the cell size S direction as the apex. Direction W It is bent along the side edges of the large cell walls 6 of intensity located along the ribbon direction L so as to be drawn in the direction of the other cell walls 8 which are positioned in a zigzag manner along. Therefore, at the time of the honeycomb material 13 in the over-expanded state, the one cell wall 7 that was located in a straight line along the expansion direction W has a central portion in the cell size S direction in all the cells 14. The restoring force of the other cell wall 8 that is positioned to face the one cell wall 7 in a bent state and the interval between the high-strength cell walls 6 that are located along the ribbon direction L are
Since the cells are bent at the same angle due to the synergistic effect of the displacement so that they are all close to each other, as shown in FIG.
A high-quality honeycomb material 1 composed of the planar aggregate of

Therefore, in the method for manufacturing the honeycomb material 1 according to the present invention, the honeycomb material laminate 12 is over-expanded from the step of forming the base material sheet 11 to which the adhesive 5 is applied in a predetermined state. The forming means in the steps until the honeycomb material 13 in the over-expanded state is formed is a means for stacking the base material sheets 11 at the time of stacking the base material sheets for forming the honeycomb material laminate 12. Although it is slightly different in
(Refer to the drawing), the honeycomb member 13 in the over-expanded state formed in this manner can be compressed by applying a predetermined load evenly in the ribbon direction L. Since the molding can be performed only by adding steps, the molding is easy.

"Effects of the Invention" As described above in detail, the honeycomb material and the method for manufacturing the same according to the present invention exhibit the following effects.

In the honeycomb material according to claim 1, when the honeycomb material is bent in any direction such as the extending direction or the ribbon direction, the cell wall is broken or the bonded portion of the cell wall is separated. You can easily fit into a curved surface type without causing any problems. Therefore, high quality, for example, easily
It is possible to form a curved honeycomb material having a complicated curved surface such as a cubic curved surface.

Further, in the method for manufacturing a honeycomb material according to claim 2,
Since it can be molded by adding only a step of uniformly applying a predetermined load in the ribbon direction and compressing the molding means, which is substantially the same as the conventional overexpanding core,
No special molding equipment is required for molding, and high quality honeycomb material can be easily molded even if it has a large size. Therefore, the cost of the molded honeycomb material increases. There is no. Moreover, the formed honeycomb material has excellent bonding strength.

As described above, the effects exhibited by the present invention are remarkably large, for example, the problems existing in this type of conventional example are eliminated.

[Brief description of the drawings]

1 to 3 show an embodiment of the honeycomb material according to the present invention. FIG. 1 is a plan view of a main part of the honeycomb material according to the present invention, and FIGS. Fig. 2 is an explanatory view showing a state in which a curved honeycomb material is formed by using the honeycomb material according to the present invention, Fig. 2 is a plan view of a main part, and Fig. 3 is a III-III line of Fig. 2. It is a sectional view taken along the line. 4 to 6 are drawings for explaining an embodiment of a method for manufacturing a honeycomb material according to the present invention, and FIG. 4 is a plan view of a base material sheet with an adhesive applied. FIG. 5 is a front explanatory view showing a step of forming a honeycomb material laminate, and FIG. 6 is a plan view of a main portion showing the honeycomb material in an overexpanded state. 7 to 9 each show a conventional example. FIG. 7 is a plan view of a main part of an overexpanding core, FIG. 8 is a plan view of a main part of a flexible core, and FIG. ,
A honeycomb material for forming a curved surface. 1 ... Honeycomb material, 2 ... cells, 3 ... cell walls (cell walls that form the end faces of the cells in the extending direction), 4 ... bent portions, 5
…… Adhesive material, 6 …… High-strength cell wall, 7 …… One cell wall (cell wall that forms one end face in the cell expansion direction), 8 …… Other cell wall (cell expansion direction Cell wall forming the other end face), 9 ... curved type, 10 ... curved honeycomb material, 10a ... concave curved surface side, 10b ... convex curved surface side, 11 ...
... Base material sheet, 12 ... Honeycomb material laminate, 13 ... Over-expanded honeycomb material, 14 ... Cell (cell of over-expanded honeycomb material), P ... Coating pitch, S …… Cell size, L …… ribbon direction, W …… extension direction.

Claims (2)

(57) [Claims] 1. A honeycomb material made of metal, comprising a planar aggregate of hollow columnar cells formed by expansion forming means, wherein each of the cells has a distance between center portions in the expansion direction in a plane. Is formed substantially longer than the length of the cell walls forming the end faces in the extending direction of the cells, which are located substantially along the direction orthogonal to the extending direction, and are symmetrical with respect to the center of the extending direction. The cells having the substantially V shape are bent in a linear manner, and the cells having the substantially V shape are aligned in the bending direction, and the cell walls forming the end faces of the cells are abutted against each other and expanded. Each of the cells arranged in series along the direction, and one of the cells arranged in series adjacent to each other in the direction orthogonal to the spreading direction, and the other cells arranged in series of the other , The bending directions are opposite to each other In addition, the cell walls are arranged in a positional relationship in which they are alternately displaced by 1/2 of the cell size in the spreading direction, and the respective cell walls abutting each other correspond to each other through a bonding material such as an adhesive. A honeycomb material characterized by being joined. 2. A predetermined number of metal-made members having a bonding material layer such as an adhesive formed on one surface thereof in a linear shape having a predetermined pitch and a predetermined width through a bonding material layer forming step. The base material sheets are sequentially stacked so that the bonding material layers are alternately displaced from the center between the pitches, and the stacked base material sheets are bonded at each position of the bonding material layers. After being laminated on each other to form a honeycomb material laminate, after cutting the honeycomb material laminate at a predetermined length either directly or in a direction orthogonal to the joining material layer formed in the linear shape. ,
Applying a tensile force in the direction of weighting of the base sheet,
The cell wall formed by the base material sheet on the side where the distance between the bonding material layers is short, is over-expanded until it becomes a substantially straight line state along the expansion direction, and then the honeycomb material formed by the over-expansion, And a step of bending the cells by uniformly applying a predetermined load in a direction orthogonal to the spreading direction and compressing the cells, thereby manufacturing the honeycomb material.