JP2012096694A - Plate material having uneven part, vehicle panel using the same, and laminated structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate material having a pattern of an uneven part high in rigidity improvement effect, a vehicle panel using the same, and a laminated structure.SOLUTION: In the plate material 1 having the uneven part 20, on the basis of a first reference surface and a second reference surface, squares partitioned by a grid formed by vertically and laterally dividing a unit region 24 arranged on the second reference surface into n-equal parts are distributed to first squares and second squares. A region formed by continuing the first squares and a region formed by continuing the second squares are assumed to be a first reference region and a second reference region, respectively. The first reference regions and the second reference regions are distributed to first projection regions, first plane regions, second projection regions and second plane regions. The uneven part 20 includes first regions 21 projecting from the first projection region to the first reference surface, second regions 22 projecting from the second projection region to the second reference surface, and plane regions including the first plane region and the second plane region.

Description

  The present invention relates to a plate member having increased rigidity by forming an uneven portion, and a vehicle panel and a laminated structure configured using the plate member.

For example, in an automobile, for the purpose of weight reduction, replacement of a material of a component made of a steel plate or the like with a light material such as an aluminum alloy plate has been studied and implemented. In this case, it is necessary to ensure the required rigidity as a premise for weight reduction.
Heretofore, in order to improve the rigidity without increasing the plate thickness of the plate material, it has been studied to improve the rigidity in terms of shape by providing an uneven pattern on the plate material.
For example, one of automobile parts is a part made of a plate material called a heat insulator. Patent Document 1 proposes a material in which a large number of protrusions are formed by embossing in order to ensure sufficient rigidity without increasing the plate thickness. Moreover, not only a heat insulator but the board | plate material which improved rigidity by forming uneven | corrugated | grooved parts, such as embossing, in various uses is proposed. (Patent Documents 2 to 6)

JP 2000-136720 A JP 2000-257441 A Japanese Patent Laid-Open No. 9-254955 Japanese Patent Laid-Open No. 2000-288643 JP 2002-307117 A JP 2002-321018 A

As described in Patent Document 1, it is a fact that a plate material on which a large number of uneven portions are formed has higher rigidity than that without the uneven portions. However, it cannot be said that what is the most suitable uneven shape for improving the rigidity without increasing the plate thickness has been elucidated. And it is always requested | required to make a rigidity improvement rate higher than before.
In addition to automobiles, various mechanical devices and the like have a demand for reducing the weight of a portion made of a plate material as much as possible. In addition to the need for weight reduction, the effect of reducing material costs is also expected. Moreover, if it is a board | plate material (material which has a board shape), a rigidity improvement request | requirement exists regardless of a material.

  In addition, the use of plate materials with uneven portions with high rigidity improvement effects, and vehicle panels that combine laminated structures including them and plate materials with uneven portions with high rigidity improvement effects are also more rigid than before. It is also demanded to.

  The present invention has been made in view of such a problem, and is a plate material having improved rigidity by providing uneven portions, and a plate material having an uneven portion pattern having a higher rigidity improving effect than before, and It is an object of the present invention to provide a used vehicle panel and a laminated structure.

1st invention is the board | plate material which improved rigidity by forming an uneven | corrugated | grooved part,
The concavo-convex portion is based on a first reference surface and a second reference surface, which are two virtual surfaces arranged in parallel with a gap therebetween,
Assuming that the second reference plane is covered with unit areas that are virtual squares of the same size, each unit area is virtually divided by a grid obtained by dividing the unit area vertically and horizontally by an integer n of 4 or more. The cells are classified into two types, a first cell and a second cell, and each column and each row of the cells always include both the first cell and the second cell, and the same type is vertically or The total number of the first ridges and the total number of the ^second ridges in the unit region are both in the range of n ² /2±0.5. An integer, a region that is connected to the first ridges is a first reference region, and a region that is connected to the second ridge is a second reference region,
The first reference area distributes a part of the first reference area to the first protruding area and distributes the remaining first reference area other than the first protruding area to the first plane area, or Distributing the entire area of the first reference area to the first protruding area;
The second reference area distributes a part of the second reference area to the second protruding area and distributes the remaining second reference area other than the second protruding area to the second plane area, or Distributing the entire area of the second reference area to either the second protruding area or the second planar area;
A first region projecting from the first projecting region defined on the second reference surface toward the first reference surface; and a first region projecting from the second projecting region defined on the second reference surface. A second region projecting toward the reference surface, and a planar region composed of the first planar region and the second planar region defined on the second reference surface,
The first region includes a first top surface obtained by projecting the first projecting region on the first reference plane with the same magnification or reduction, and a contour of the first top surface and a contour of the first projecting region. The first side to be connected,
The second region includes a second top surface obtained by projecting the second projecting region on the first reference plane with the same magnification or reduction, an outline of the second top surface, and an outline of the second reference region. The flat region is a plate material having an uneven portion, characterized in that the flat region is composed of a flat portion formed by the contours of the first flat region and the second flat region. Item 1).

  A second invention is a laminated structure formed by laminating a plurality of plate materials, and at least one of the plate materials is a plate material having the uneven portion according to the first invention. (Claim 11).

  3rd invention is a vehicle panel which has an outer panel and the inner panel joined to the back surface of this outer panel, Comprising: Either one or both of the said outer panel and said inner panel are described in 1st invention. The vehicle panel is characterized by comprising a plate having an uneven portion.

  In the first invention, as described above, the concavo-convex portion includes the first region protruding from the first protruding region defined on the second reference surface toward the first reference surface, and the second The second region projecting from the second projecting region defined on the reference surface toward the first reference surface is provided. In addition, the planar area composed of the first planar area and the second planar area defined on the second reference plane is provided. The first region includes the first top surface, the first side surface connecting the contour of the first top surface and the contour of the first protruding region, and the second region includes the second surface. It consists of a top surface and the second side surface connecting the contour of the second top surface and the contour of the second projecting region. The planar area includes a planar portion formed by the outlines of the first planar area and the second planar area.

Since it has such a structure, the above-mentioned plate material of the present invention is excellent in bending rigidity and is excellent in energy absorption characteristics.
The reason why the rigidity is improved is considered as follows. That is, the first region and the second region are the first top surface and the second top surface disposed on the first reference surface disposed at a position away from the neutral surface of the plate material, and the plate material. The first side surface and the second side surface intersecting each other in the thickness direction. Moreover, the said plane area | region consists of the said plane part arrange | positioned on the 2nd reference plane distribute | arranged to the position away from the neutral surface of the board | plate material. Therefore, many materials can be arranged at positions away from the neutral surface of the plate material. Therefore, many materials can be effectively used as the strength member, and the rigidity improvement effect can be enhanced. Further, along with the improvement in rigidity, it is possible to obtain the effect of improving the vibration damping property and the effect of suppressing the sound echo due to the uneven shape.

  Further, when the first reference area is distributed to the first projecting area and the first plane area, and the second reference area is distributed to the second projecting area and the second plane area, the distribution is performed. Ratios and distribution patterns can be varied. Thereby, the rigidity of the uneven | corrugated | grooved part formed and its anisotropy can be changed. That is, not only a plate material having a small rigidity anisotropy but also a plate material having a large rigidity anisotropy can be formed.

  A plate material having large rigidity anisotropy has a direction in which deformation is likely to occur in a single plate material and a direction in which deformation is difficult. Therefore, it is possible to obtain a plate material that is highly rigid and difficult to be deformed with respect to an input in a specific direction, and that is more easily deformed with respect to an input from other directions than the direction exhibiting the high rigidity. Such a plate material is used for, for example, an automobile body and a structural member thereof to form a strength member that is not easily deformed with respect to an input direction of a load generated during normal use, and an input direction of a load generated at the time of a collision or the like. In contrast, the structure can be easily deformed to absorb an impact.

  As will be described later, in the first invention, the first reference region is distributed to the first projecting region and the first planar region, and the second reference region is divided into the second projecting region and the second planar region. When the distribution is performed, the structure of the uneven portion changes depending on which region the distribution is performed. As a specific configuration of the concavo-convex portion, there are a case where the first region, the second region and the planar region are composed of three regions, a case where the first region and the second region are composed of two regions, a case where the first region and the planar region are formed. There are cases where the area consists of two areas. In addition, in the said planar area, it may consist of both the said 1st planar area and the said 2nd planar area, and may consist of either one.

  In the second invention, a laminated structure having very high rigidity can be easily obtained by using, as a part of the laminated structure, a plate material having an uneven portion having a rigidity improving effect as described above. In addition, it is possible to obtain the effect of improving the vibration damping property accompanying the improvement of the rigidity and the effect of improving the sound absorption by enclosing the air layer.

  In the third invention, by using the plate member having the uneven portion having the rigidity improving effect as described above for either one or both of the outer panel and the inner panel, a vehicle panel having extremely high rigidity can be easily obtained. Obtainable. In addition, it is possible to obtain the effect of improving the vibration damping property accompanying the improvement of the rigidity and the effect of improving the sound absorption by enclosing the air layer.

The partial top view of the board | plate material which has an uneven | corrugated | grooved part in Example 1. FIG. The elements on larger scale of the AA arrow cross section of FIG. The partial perspective view of the board | plate material which has an uneven | corrugated | grooved part in Example 1. FIG. The partial top view of the board | plate material which changed the formation direction of the uneven | corrugated | grooved part in Example 1. FIG. FIG. 3 is an explanatory diagram illustrating a unit area in the first embodiment. FIG. 3 is an explanatory diagram illustrating a second reference surface in the first embodiment. The partial top view of the board | plate material which has an uneven | corrugated | grooved part in Example 2. FIG. The elements on larger scale of the BB arrow cross section of FIG. The partial perspective view of the board | plate material which has an uneven | corrugated | grooved part in Example 2. FIG. The partial top view of the board | plate material which changed the formation direction of the uneven | corrugated | grooved part in Example 2. FIG. FIG. 9 is a diagram illustrating a second reference surface in the second embodiment. The partial top view of the board | plate material which has an uneven | corrugated | grooved part in Example 3. FIG. The partial perspective view of the board | plate material which has an uneven | corrugated | grooved part in Example 3. FIG. FIG. 10 is a diagram illustrating a second reference surface in Example 3. Explanatory drawing which shows the unit area | region in Example 4. FIG. Explanatory drawing which shows the 2nd reference surface which has arrange | positioned the unit area | region continuously in the same attitude | position in Example 4. FIG. Explanatory drawing which shows the 2nd reference surface which has continuously arranged the shape which rotated the unit area | region 90 degrees in Example 4. FIG. Explanatory drawing which shows the 2nd reference plane in which the shape which is line symmetrical with respect to each edge | side of a unit area in Example 4 was continuously arranged. FIG. 10 is an explanatory diagram illustrating a unit area in the fifth embodiment. FIG. 10 is an explanatory diagram illustrating a second reference surface in which shapes that are line-symmetric with respect to each side of a unit region are continuously arranged in Example 5. Explanatory drawing which shows the unit area | region in Example 6. FIG. Explanatory drawing which shows the 2nd reference plane which has arrange | positioned the unit area | region continuously in the same attitude | position in Example 6. FIG. Explanatory drawing which shows the cylindrical material which has an uneven | corrugated | grooved part in Example 7. FIG. Explanatory drawing of the laminated structure in Example 8. FIG. Explanatory drawing of the vehicle panel in Example 9. FIG.

In the present invention, the representation of the shape such as a square is not limited to the geometrically narrow concept, and generally includes a shape that can be recognized as the above shape, and each side is slightly curved, Naturally, it is also allowed to provide a curved surface called a fillet in which roundness or the like necessary for molding is formed at corners or surfaces.
Further, in the present invention, the expression of parallelism is not limited to a geometrically narrow concept, and may be anything that can be generally recognized as parallel.

Also, whether the first reference area is distributed to the first protruding area or the first planar area, and whether the second reference area is distributed to the second protruding area or the second planar area Thus, the configuration of the uneven portion changes.
When the entire area of the first reference area is distributed to the first projecting area and the entire area of the second reference area is distributed to the second projecting area, the concavo-convex portion is separated from the first area and the first area. And the second region.

  Further, a part of the first reference region is distributed to the first projecting region, and the remaining first reference region other than the first projecting region is distributed to the first planar region, or the first reference region When the entire region is distributed to the first projecting region, and the second reference region is distributed to the second planar region, the concavo-convex part is the first region and the planar surface. Formed by regions.

In addition, the first reference area distributes the entire area to the first protruding area, distributes a part of the second reference area to the second protruding area, and the remaining other than the second protruding area. When the second reference region is distributed to the second planar region, the uneven portion is formed by the first region, the second region, and the planar region.
The first reference area is partly distributed to the first projecting area, the remaining first reference area other than the first projecting area is distributed to the first planar area, and the second The reference area distributes a part of the second reference area to the second protruding area and distributes the remaining second reference area other than the second protruding area to the second planar area, or the second reference area. Even when the entire region is distributed to the second projecting region, the concavo-convex portion is formed by the first region, the second region, and the planar region.

  In addition, the first top surface and the second top surface may be configured by the surface of the first reference surface, or opposite to the direction in which the second reference surface is arranged from the first reference surface. It can also comprise by the site | part which protruded in this direction. In addition, the flat portion may be configured by the surface of the second reference surface, or may be configured by a portion protruding from the second reference surface in a direction opposite to the direction in which the first reference surface is arranged. You can also Examples of the shape of the protruding portion include a dome shape, a ridge line shape, and a cone shape, but are not limited thereto.

  Also, how to distribute the first reference area to the first protruding area and the first planar area, and how to distribute the second reference area to the second protruding area and the second planar area. By doing so, the obtained rigidity and its anisotropy can be appropriately changed. At this time, it is preferable that the shape of the concavo-convex portion formed by two or more regions among the first region, the second region, and the planar region to be formed is regularly arranged. When the uneven portion has an irregular shape, a local change in rigidity occurs, and the rigidity and its anisotropy may become unstable.

In the plate material having the concavo-convex portion, the range of the number n that equally divides the unit region is preferably 4 ≦ n ≦ 10.
In the case of n <4, the shape of the concavo-convex portion is extremely simple, and a desired rigidity improvement effect may not be obtained. In the case of n> 10, the shape of the concavo-convex part may be small and desired rigidity may not be obtained. In addition, the shape of the concavo-convex portion may be complicated and it may be difficult to form.

Further, in the plate material having the concavo-convex portion, the first reference region and the second reference region are formed at the corner portions of the two so that the areas of the first and second reference regions are not changed after the first and second ridges are connected. Can be configured by deforming a part of them into an arc shape.
Here, the corner refers to a corner that becomes a convex angle in the outline of the first reference area and a corner that becomes a convex angle in the outline of the second reference area. In this case, since the corner | angular part of the unevenness | corrugation of the board | plate material which has the said uneven | corrugated | grooved part can be smoothed, while being easy to shape | mold, an expansion of a use and improvement of design property can be aimed at.

Further, in the plate having the concavo-convex portion, the first reference region and the second reference region may be formed by connecting a part of a boundary line formed between the first reference region and the second reference region, respectively, It can also be configured by inclining so as not to change.
Also in this case, it is possible to improve the formability of the plate material having the concavo-convex portion, expand the application, or improve the design.

Further, in the plate having the concavo-convex portion, an inclination angle θ ₁ (°) of the first side surface with respect to the second reference surface and an inclination angle θ ₂ (°) of the second side surface with respect to the second reference surface are: It is preferable that it exists in the range of 10 degrees-90 degrees (Claim 5).
When the inclination angle θ ₁ (°) of the first side surface and the inclination angle θ ₂ (°) of the second side surface are in the range of 10 ° to 90 °, excellent rigidity is improved while securing moldability. It is possible to obtain an uneven portion shape having a rate.

When the inclination angle θ ₁ (°) of the first side surface and the inclination angle θ ₂ (°) of the second side surface are less than 10 °, the protruding heights of the first region and the second region are increased. And the rigidity improvement rate decreases. In addition, it is difficult to form the concavo-convex portion when the inclination angle θ ₁ (°) of the first side surface and the inclination angle θ ₂ (°) of the second side surface exceed 90 °, which is an unnecessary region.
When the metal plate is press-molded, the upper limit values of the inclination angle θ ₁ (°) of the first side surface and the inclination angle θ ₂ (°) of the second side surface are 70 ° or less due to the problem of formability. More preferably. Therefore, a more preferable range is 10 ° to 70 °.
Moreover, although the said 1st side surface and the said 2nd side surface are comprised by several surfaces, all of those surfaces do not need to be the same inclination angles, and you may change an inclination angle according to a site | part. However, in any face, it is preferable to be within the range of the preferable inclination angle.

In the plate member having the concavo-convex portion, it is preferable that at least a part of the first reference surface and the second reference surface are respectively formed of parallel curved surfaces.
In this case, the plate material having the excellent uneven portion can be deformed into various shapes, and the application can be expanded.

Moreover, in the plate material having the concavo-convex portion, it is preferable that the concavo-convex portion is formed by press-molding a metal plate.
The metal plate can be easily formed with uneven portions by performing plastic working such as press forming such as embossing or roll forming. Therefore, in the case of a metal plate, it is relatively easy to apply the above excellent uneven shape. As a material of the metal plate, various materials that can be plastically processed such as aluminum alloy, steel, and copper alloy can be applied.

In the forming method, casting, cutting, etc. can be employed in addition to plastic working such as roll forming.
Moreover, as long as the said board | plate material has the said uneven | corrugated | grooved part, it is effective also in materials other than a metal, For example, it can also be set as a resin board etc. If it is a resin material or the like, the uneven portion can be formed by injection molding or hot pressing. Resin materials are less subject to molding restrictions than metal materials, and the degree of freedom in design is wider.

Moreover, in the plate material having the concavo-convex portion, the thickness t (mm) before forming the metal plate is preferably 0.05 mm to 6.0 mm.
When the thickness of the metal plate is less than 0.05 mm or more than 6.0 mm, there is little need to improve the rigidity for use.

In the plate material having the uneven portion, the ratio L / t between the length L (mm) of one side of the unit region and the plate thickness t (mm) of the metal plate is preferably 10 to 2000 ( Claim 8).
If the ratio L / t is less than 10, molding may be difficult. On the other hand, if the ratio L / t exceeds 2000, a sufficient uneven portion shape cannot be formed and rigidity is reduced. There is a risk of problems.

In the plate material having the uneven portion, the ratio H / t between the distance H (mm) between the first reference surface and the second reference surface and the plate thickness t (mm), and the first side surface And the second reference plane has the largest inclination angle θ ₁ (°) in the relationship of 1 ≦ (H / t) ≦ −3θ ₁ +272, and the ratio H / T and the second side surface It is preferable that the largest inclination angle θ ₂ (°) formed by the second reference plane has a relationship of 1 ≦ (H / t) ≦ −3θ ₂ +272.

When the ratio H / t is less than 1, there may be a problem that the effect of improving the rigidity by forming the first region cannot be sufficiently obtained. On the other hand, when the ratio H / t exceeds −3θ ₁ +272, there is a possibility that a problem that molding becomes difficult may occur. Similarly, when the ratio H / t is less than 1, there may be a problem that the effect of improving the rigidity by forming the second region cannot be sufficiently obtained. On the other hand, when the ratio H / t exceeds −3θ ₂ +272, there is a possibility that a problem that molding becomes difficult may occur.

Moreover, in the laminated structure of the second invention, a laminate having a three-layer structure composed of one flat face plate disposed on both sides of the plate having the concavo-convex portion as one core material, can do. Moreover, it is also possible to have a structure in which such a basic structure is repeated, that is, a multilayer structure in which a plurality of plate members having the above-described uneven portions are laminated on each other via a flat face plate.
Alternatively, a structure in which a plate material having a plurality of uneven portions is directly laminated to form a core material, and a flat face plate is bonded to the surface of one side or both sides thereof can also be adopted.
Moreover, it can also be set as the laminated structure of the state which only laminated | stacked the board | plate material which has a several uneven | corrugated | grooved part directly.
The number of laminated plate members can be changed according to the application and required characteristics.

The vehicle panel of the third invention is not limited to automobile hoods, but can be applied to panels and reinforcing members such as doors, roofs, floors and trunk lids, and energy absorbing members such as bumpers, crash boxes and door beams. Moreover, a steel plate, an aluminum alloy plate, etc. can be used as the outer panel and the inner panel.
When the outer panel is made of an aluminum alloy plate, for example, a 6000 series alloy is preferable because it is relatively inexpensive. When the inner panel is made of an aluminum alloy plate, for example, a 5000 series alloy plate is preferable because of its relatively good formability.

Example 1
The board | plate material 1 which has the uneven | corrugated | grooved part 20 concerning the Example of 1st invention is demonstrated using FIGS.

  FIG. 6 shows the arrangement of the first and second reference regions 213, 223, the first protruding region A1, and the second protruding region B1 in the second reference plane K2 in the shape of the concavo-convex portion 20 of the plate 1 shown in this example. It is represented by. In the figure, the solid lines are the outlines of the first reference area 213 and the second reference area 223, and the symbol written inside the outline is either the first protrusion area A1 or the second protrusion area B1. It indicates whether it belongs to the area.

The plate material 1 having the concavo-convex portion 20 of the present example is a plate material having increased rigidity by forming the concavo-convex portion 20 as shown in FIGS.
The uneven portion 20 is configured as follows.
As shown in FIG. 2, the first reference surface K1 and the second reference surface K2, which are two virtual surfaces arranged in parallel at a distance, are used as a reference. As shown in FIG. 5 and FIG. 6, it is assumed that the second reference plane K2 is covered with unit areas 24 that are virtual squares of the same size, and each unit area 24 is partitioned by a grid that is divided into six equal parts vertically and horizontally. The virtual cells to be used are classified into two types, a first eye 241 and a second eye 242. Each column and each row of the meshes include both the first and second rods 241 and 242 and are arranged so that two or more of the same type are adjacent vertically or horizontally. The total number of the first ridges 241 and the total number of the second ridges 242 in the unit region 24 are both 18, and the region connecting the first ridges 241 is the first reference region 213 and the second ridge 242 is The connected area was defined as a second reference area 223. In this example, as shown in FIG. 6, the entire area of the first reference area 213 is distributed to the first protruding area A1, and the entire area of the second reference area 223 is distributed to the second protruding area B1.

As shown in FIGS. 1 to 3, the plate 1 having the concavo-convex portion 20 of the present example has a first reference plane K <b> 1 from the first protruding area A <b> 1 (FIG. 6) defined on the second reference plane K <b> 2 (FIG. 6). Similarly, the first region 21 projecting toward the first region 21 and the second region projecting toward the first reference surface K1 from the second projecting region B1 (FIG. 6) defined on the second reference surface K2 (FIG. 6). 22 are provided.
As shown in FIGS. 1 and 2, the first region 21 includes a first top surface 211 obtained by projecting the first projecting region A1 on the first reference plane K1, and the contour of the first top surface 211 and the first top surface 211. It consists of the 1st side surface 212 which connects the outline of 1 protrusion area | region A1. The second region 22 includes a second top surface 221 obtained by projecting the second projecting region B1 on the first reference plane K1, a contour of the second top surface 221 and a contour of the second projecting region B1. And a second side surface 222 connecting the two.

Here, a specific procedure for determining the first reference region 213 and the second reference region 223 in the present example will be described in more detail.
As described above, as shown in FIG. 5, the virtual cells divided by the grid obtained by dividing the inside of each unit area 24 into 6 parts vertically and horizontally are classified into two types of first eye 241 and second eye 242. Each column and each row of the meshes include both the first cage 241 and the second cage 242 and are arranged so that two or more of the same type are adjacent vertically or horizontally. At this time, the total number of the first rods 241 and the total number of the second rods 242 in the unit region 24 are both 18.

  As shown in FIG. 5, a cell existing at any one corner of the unit region 24 is set as a reference cell (1-A). A column along the side of the unit area 24 including the reference cell (1-A) is defined as a first column, and columns sequentially adjacent to the first column are defined as second to sixth columns. Similarly, a row along the side of the unit region 24 including the reference cell (1-A) is defined as A row, and adjacent rows are sequentially defined as BF rows. Here, the ridge where each column intersects each row is represented using the number of each column and the alphabet of each row.

  In this example, 1-A 升 to 5-A 升, 4-B 升 to 5-B 升, 4-C 升 to 5-C 升, 2-D 升 to 3-D 升, 2-E 升 to Eighteen folds of 3-E ２− and 2-F 升 to 6-F と し are designated as first ridges 241, and 18 folds other than the above are designated as second ridges 242. Then, a region where the first rods 241 are connected is referred to as a first reference region 213, and a region where the second rods 242 are connected is referred to as a second reference region 223. As a result, as shown in FIG. 5, there are two first reference areas 213 and two second reference areas 223 in the unit area 24. Next, as shown in FIG. 6, on the second reference plane K2, the unit regions 24 are continuously arranged so as to be line symmetric with respect to the respective sides. Then, the entire area of the first reference area 213 is distributed to the first protruding area A1, and the entire area of the second reference area 223 is distributed to the second protruding area B1, from which the first area 21 and the second area described above are distributed. 22 is formed. Therefore, in this example, the first planar region A2 and the second planar region B2 do not exist, and the planar region 23 is not formed.

Further, as shown in FIG. 5, the length L of one side of the virtual unit region 24 forming the second reference plane K2 is 24 mm, and the size of each unit region 24 arranged on the second reference plane K2 shown in FIG. All are equal.
As shown in FIG. 2, the first reference surface K1 and the second reference surface K2 in this example are planes parallel to each other. The first top surface 211 and the second top surface 221 are configured such that the thickness center thereof overlaps the first reference surface K1. A distance between the first reference surface K1 and the second reference surface K2 is defined as a protrusion height H. In this example, the protruding height H of the first region 21 and the second region 22 is 1.5 mm.

Further, as shown in FIG. 2, the inclination angle theta ₂ of the second side surface 222 with respect to the inclination angle theta ₁ and the second reference plane K2 of the first side surface 212 with respect to the second reference plane K2 are _{equal, θ 1 = θ 2 = 30} ° It is.
Further, the plate material 1 having the uneven portion 20 of this example is a 1000 series aluminum plate having a plate thickness t = 0.3 mm. The concavo-convex portion 20 is formed by press molding using a pair of molds. In addition, this shaping | molding method can also employ | adopt other plastic processing methods, such as roll shaping | molding formed with a pair of shaping | molding roll which provided the desired uneven | corrugated shape on the surface.

  The ratio L / t between the length L (mm) of one side of the unit region 24 and the thickness t (mm) of the aluminum plate is 80, which is in the range of 10 to 2000.

The ratio H / t between the distance H (mm) between the first reference surface K1 and the second reference surface K2 and the plate thickness t (mm) is 5. Further, the inclination angle θ ₁ = 30 ° formed by the first side surface 212 and the second reference surface K2 is −3θ ₁ + 272 = 182. Therefore, the relationship of 1 ≦ H / t ≦ 182 is satisfied. Similarly, the inclination angle θ ₂ = 30 ° formed by the second side surface 222 and the second reference surface K2 is −3θ ₂ + 272 = 182. Further, as described above, the ratio H / t = 5. Therefore, the relationship of 1 ≦ H / t ≦ 182 is satisfied.

Next, the effect of the board | plate material 1 which has the uneven | corrugated | grooved part 20 in this example is demonstrated.
The board | plate material 1 has the uneven | corrugated | grooved part of the above special shapes. That is, as shown in FIGS. 1 to 3, the first region 21 projecting from the first projecting region A1 (FIG. 6) defined on the second reference surface K2 (FIG. 6) toward the first reference surface K1. And a second region 22 projecting from the second projecting region B1 (FIG. 6) defined on the second reference surface K2 toward the first reference surface K1. As shown in FIG. 2, the first region 21 includes a first top surface 211, a first side surface 212 that connects the contour of the first top surface 211 and the contour of the first projecting region A <b> 1. The region 22 includes a second top surface 221 and a second side surface 222 that connects the contour of the second top surface 221 and the contour of the second projecting region B1.

Since it has such a structure, the plate 1 of this example is excellent in bending rigidity and is a plate having excellent energy absorption characteristics.
The reason why the rigidity is improved is considered as follows. That is, the first region 21 and the second region 22 include the first top surface 211 and the second top surface 221 disposed on the first reference surface K1 disposed at a position away from the neutral surface of the plate member 1, and the plate member. The first side surface 212 and the second side surface 222 intersecting with each other in the thickness direction, and many materials can be arranged at positions away from the neutral surface of the plate member 1. Therefore, many materials can be effectively used as the strength member, and the rigidity improvement effect and energy absorption characteristics can be enhanced. Further, along with the improvement in rigidity, it is possible to obtain the effect of improving the vibration damping property and the effect of suppressing the sound echo due to the uneven shape.

  In addition, since the entire area of the first reference area 213 is distributed to the first protruding area A1 and the entire area of the second reference area 223 is distributed to the second protruding area B1, the uneven portion 20 has the first area. 21 and the second region 22. Therefore, the first region 21 and the second region 22 are regularly formed on the entire surface. Therefore, in addition to the above-described rigidity improving effect, a plate material having very little anisotropy can be obtained.

(FEM analysis)
In order to quantitatively determine the rigidity improvement effect of the plate material 1 of this example, bending rigidity evaluation by a cantilever beam using FEM analysis was performed.
In the FEM analysis, the bending rigidity was evaluated in the 0 ° direction and the 45 ° direction by changing the formation direction of the uneven portion 20 in the test piece.

The shape of the test piece used for the FEM analysis has a rectangular shape of 120 mm × 120 mm, and an uneven portion 20 is formed on the entire surface. In consideration of the increase in surface area, the plate thickness was t = 0.272 mm.
In the end portion of the test piece, one end was used as a fixed end, and the end arranged opposite to the fixed end was used as a free end. A 1N load was applied to the central portion of the side forming the free end, and the amount of deflection of the plate 1 was determined by performing FEM analysis.
The evaluation was performed by comparing the amount of deflection obtained by performing the same FEM analysis on a flat base plate on which the uneven portion 20 was not formed.

<0 ° direction>
As shown in FIG. 1, in the test piece in which the concavo-convex portion 20 is formed so that the side formed by the unit region 24 and the side formed by the plate member 1 are parallel, the end Z1 located in the upper side in the figure is a fixed end, The direction in which the end Z2 facing the end Z1 is the free end was defined as the 0 ° direction.
It has been clarified that the plate material 1 having the concavo-convex portion 20 of Example 1 has a bending rigidity improved by 5.72 times in the 0 ° direction as described above compared to the flat plate-like base plate.

<45 ° direction>
As shown in FIG. 4, in the test piece in which the concavo-convex portion 20 is formed so that the side formed by the unit region 24 and the side formed by the plate material 1 are 45 °, the upper end Z3 in FIG. The direction in which the end Z4 facing the end Z3 is the free end was defined as the 45 ° direction.
It has been clarified that the plate material 1 having the concavo-convex portion 20 of Example 1 has a flexural rigidity improved by 4.16 times in the above-described 45 ° direction as compared to the flat base plate.

(Example 2)
The board | plate material 1 which has the uneven | corrugated | grooved part 20 concerning this example is demonstrated using FIGS.
In this example, as shown in FIG. 11, the unit region 24 is arranged on the second reference plane K2 and the first reference region 213 and the second reference region 223 are formed, and then the first reference region is formed. In this example, all of the region 213 is the first protruding region A1, and all of the second reference region 223 is the second planar region B2.

  FIG. 11 shows the second reference plane K2 formed as described above by the arrangement of the first reference area 213, the second reference area 223, the first protruding area A1, and the second planar area B2. In the figure, the solid lines are the outlines of the first reference area 213 and the second reference area 223, and the symbols written inside the outline are either the first protruding area A1 or the second planar area B2. It indicates whether it belongs to the area.

Accordingly, as shown in FIGS. 7 to 9, the concavo-convex portion 20 is protruded from the first protruding area A1 (FIG. 11) defined on the second reference surface K2 (FIG. 11) toward the first reference surface K1. 1 region 21 and a planar region 23 composed of a second planar region B2 (FIG. 11) similarly defined on the second reference plane K2. The planar area 23 is composed of a planar portion 231 formed by the outline of the second planar area B2. Further, as shown in FIG. 8, the flat portion 231 is configured such that the center of the plate thickness thereof overlaps with the second reference plane K2. The configuration of the first region 21 is the same as that in the first embodiment.

  As shown in FIGS. 7 to 9, the plate 1 shown in this example includes a first top surface 211 arranged on the first reference plane K <b> 1, a first side surface 212 arranged to intersect the plate 1, and It consists of the plane part 231 distribute | arranged on the 2nd reference plane K2. Therefore, by having the first top surface 211 and the flat surface portion 231 that are disposed on the upper surface side and the lower surface side with respect to the neutral surface of the plate member 1, the rigidity improvement effect and the energy absorption characteristics are further enhanced. Can do. Further, as with the first embodiment, with the improvement in rigidity, it is possible to obtain an effect of improving vibration damping and an effect of suppressing sound echo due to the uneven shape.

(FEM analysis)
In order to quantitatively determine the effect of improving the rigidity of the plate 1 of this example, the bending rigidity was evaluated by a cantilever using FEM analysis.
In the FEM analysis, the test piece was evaluated in the 0 ° direction, 45 ° direction, 90 ° direction, and 135 ° direction by changing the formation direction of the uneven portion 20.

The shape of the test piece used for the FEM analysis has a rectangular shape of 120 mm × 120 mm, and an uneven portion 20 is formed on the entire surface. In consideration of an increase in surface area, the plate thickness was t = 0.285 mm.
In the end portion of the test piece, one end was used as a fixed end, and the end arranged opposite to the fixed end was used as a free end. A 1N load was applied to the central portion of the side forming the free end, and the amount of deflection of the plate 1 was determined by performing FEM analysis.
The evaluation was performed by comparing the amount of deflection obtained by performing the same FEM analysis on a flat base plate on which the uneven portion 20 was not formed.

<0 ° direction>
As shown in FIG. 7, in the test piece in which the concavo-convex portion 20 is formed so that the side of the unit region 24 and the side of the plate material 1 are parallel, the end Z <b> 1 located in the upper part in the figure is a fixed end, The direction in which the end Z2 facing Z1 is a free end was defined as the 0 ° direction.
It has been clarified that the plate material 1 having the uneven portion 20 of this example has a bending rigidity improved by 5.19 times in the 0 ° direction described above compared to the flat base plate.

<45 ° direction>
As shown in FIG. 10, in the test piece in which the concavo-convex portion 20 is formed so that the angle formed between the side of the unit region 24 and the side of the plate 1 is 45 °, the end Z <b> 3 positioned at the upper side in FIG. The direction in which the end Z4 facing the end Z3 is the free end was defined as the 45 ° direction.
It has been clarified that the plate material 1 having the uneven portion 20 of this example has a flexural rigidity improved by 5.17 times compared to the flat base plate in the 45 ° direction described above.

<90 ° direction>
As shown in FIG. 7, in the test piece in which the concavo-convex portion 20 is formed so that the side of the unit region 24 and the side of the plate 1 are parallel, the end Z5 located on the left side in the figure is a fixed end, The direction in which the end Z6 facing Z5 is a free end was defined as a 90 ° direction.
It has been clarified that the plate material 1 having the uneven portion 20 of the present example has a bending rigidity improved by 9.29 times compared to the flat base plate in the 90 ° direction described above.

<135 ° direction>
As shown in FIG. 10, in the test piece in which the concavo-convex portion 20 is formed so that the angle formed between the side of the unit region 24 and the side of the plate 1 is 45 °, the end Z7 located on the left side in FIG. The direction in which the end Z8 facing the end Z7 is the free end was defined as the 135 ° direction.
It has been clarified that the plate material 1 having the concavo-convex portion 20 of this example has a flexural rigidity improved by 5.18 times compared to the flat plate.
From the result of the bending rigidity evaluation by the cantilever using the above FEM analysis, the plate material 1 having the uneven portion 20 shown in this example has a particularly excellent rigidity improving effect with respect to the 90 ° direction, and the 0 ° direction. In the 45 ° direction and 135 ° direction, the rigidity anisotropy was found to be extremely small.

(Example 3)
In this example, as shown in FIGS. 12 to 14, after the unit region 24 is arranged on the second reference plane K2 and the first reference region 213 and the second reference region 223 are formed, The first reference area 213 distributes a part of the first reference area 213 to the first projecting area A1, and distributes the remaining first reference area 213 other than the first projecting area A1 to the first flat area A2. The entire area 223 is distributed to the second plane area B2.

In this example, the first reference area 213 was distributed to the first protruding area A1 and the first flat area A2 as follows.
As shown in FIG. 14, one of the two first reference regions 213 formed in the unit region 24 is a temporary projecting region 214, and the other is a temporary flat region 215. After the unit areas 24 distributed in this way are arranged so as to be line symmetric with respect to each side of the unit area 24, the first reference area 213 composed of the temporary protrusion areas 214 is defined as a first protrusion area A1, The first reference region 213 composed of the planar region 215 is defined as a first planar region A2.

  FIG. 14 shows the second reference plane K2 formed as described above by the arrangement of the first reference area 213, the second reference area 223, the first protruding area A1, the first planar area A2, and the second planar area B2. Is. In the figure, the solid lines are the contour lines of the first reference region 213 and the second reference region 223, and the symbols written inside the contour lines are the first projecting region A1, the first planar region A2, or the second reference region. This indicates which region of the two plane regions B2.

  The plate 1 having the concavo-convex portion 20 of this example has a small number of concavo-convex formed in the cross section taken along the line DD shown in FIG. Therefore, the rigidity improvement rate in a portion having a cross-sectional shape similar to that of the DD line cross-section is smaller than that of a cross-section in which many irregularities are formed, and is easily deformed. Therefore, it is highly rigid and difficult to deform in the direction in which many irregularities are formed in the cross section, and the above-mentioned high for the input from the direction perpendicular to the DD line cross section or the bending with the DD line as the axis. It is possible to obtain a plate material that is more easily deformed than the direction showing rigidity.

Example 4
This example is an example in which the unit area 24 shown in FIG. 15 is configured and the arrangement of the unit areas 24 on the second reference plane K2 is changed as shown in FIGS.
As shown in FIG. 15, the unit region 24 of this example classifies virtual cells divided by a lattice obtained by dividing the unit region 24 into four equal parts in the vertical and horizontal directions into first and second cells 241 and 242. Each column and each row of the meshes include both the first cage 241 and the second cage 242 and are arranged so that two or more of the same type are adjacent vertically or horizontally. At this time, the total number of the first rods 241 and the total number of the second rods 242 in the unit region 24 are both eight, and the region connecting the first rods 241 is defined as the first reference region 213 and the second A region where the ridges 242 are connected is defined as a second reference region 223. At this time, as shown in FIG. 15, two first reference regions 213 and two second reference regions 223 are formed.

The second reference plane K2 shown in FIG. 16 is an example in which the unit areas 24 of this example are continuously arranged in the same posture in the vertical and horizontal directions.
The second reference plane K2 shown in FIG. 17 is an example in which the unit regions 24 of this example are continuously arranged by being rotated by 90 °.
A second reference plane K2 shown in FIG. 18 is an example in which the unit regions 24 of this example are continuously arranged so as to be line-symmetric with respect to the respective sides.

In any of the above modifications, the first reference region 213 and the second reference region 223 are distributed to the first projecting region A1, the first planar region A2, the second projecting region B1, and the second planar region B2. Then, the first region 21 and the second region 22 projecting toward the first reference plane K1 from the formed first projecting region A1 and second projecting region B1 are formed, and the first planar region A2 and the second region 22 are formed. A planar region 23 is formed from the planar region B2 to constitute a plate material having an uneven portion. As described above, the first reference region 213 is distributed to either the first projecting region A1 or the first planar region A2, and the second reference region 223 is any of the second projecting region B1 or the second planar region B2. The configuration of the concavo-convex portion changes depending on whether the distribution is made.
In this example, the plate material formed on the basis of the second reference plane K2 shown in FIGS. 16 to 18 has an effect of improving the rigidity, and the rigidity anisotropy is changed by changing the configuration of the uneven portion. Can be changed.

(Example 5)
In this example, as shown in FIG. 19, after connecting the first rod 241 and the second rod 242 arranged in the unit region 24 (FIG. 15) of the fourth embodiment, both the areas are not changed. This is an example in which a part of the corner portion is configured to be deformed into an arc shape. Specifically, as shown in the figure, the two convex corners a1 formed by the contour of the first reference region 213 and the two convex corners a2 formed by the second reference region 223 are Is also deformed into an arc with the same radius of curvature.

  The arrangement of the unit regions 24 is an example in which the unit regions 24 are continuously arranged so as to be line-symmetric with respect to each side of the unit region 24 as shown in FIG. Also in this example, the first reference area 213 and the second reference area 223 shown in the figure are distributed to the first projecting area A1, the first planar area A2, the second projecting area B1, and the second planar area B2. . Then, the first region 21 and the second region 22 projecting toward the first reference surface K1 are formed from the first projecting region A1 and the second projecting region B1 defined on the second reference surface K2, 2 A planar material 23 is formed from the first planar region A2 and the second planar region B2 defined on the reference plane K2, and a plate material having an uneven portion is formed. As described above, the first reference region 213 is distributed to either the first projecting region A1 or the first planar region A2, and the second reference region 223 is any of the second projecting region B1 or the second planar region B2. The configuration of the concavo-convex portion changes depending on whether the distribution is made.

The plate material formed on the basis of the second reference plane K2 shown in FIG. 20 of this example has an effect of improving the rigidity, and the rigidity anisotropy can be changed by changing the configuration of the uneven portion. it can. Moreover, since the corner | angular part of the unevenness | corrugation of the board | plate material which has an uneven | corrugated | grooved part can be made smooth, shaping | molding becomes easy and the expansion of a use and the improvement of design property can be aimed at.
The arrangement of the unit areas 24 arranged on the second reference plane K2 can be changed in the same manner as in the third embodiment.

(Example 6)
In this example, as shown in FIG. 21, a part of the outline of the first reference region 213 and the second reference region 223 formed in the unit region 24 (FIG. 15) shown in the fourth embodiment is inclined. is there. In this example, in the unit region 24 (FIG. 15), the long side b2 is inclined among the two sides of the short side b1 and the long side b2 that form the concave angles of the first reference region 213 and the second reference region 223. It is. The inclination angle α was 20 °. At this time, the areas of the first reference region 213 and the second reference region 223 formed are the same before and after the long side b2 is inclined.

  As shown in FIG. 22, the unit areas 24 are continuously arranged in the same posture in the vertical and horizontal directions. The first reference region 213 and the second reference region 223 shown in the figure are distributed to the first projecting region A1, the first planar region A2, the second projecting region B1, and the second planar region B2. Then, a first region 21 and a second region 22 projecting from the first projecting region A1 and the second projecting region B1 defined on the second reference surface K2 toward the first reference surface K1 are formed, and the second The planar area 23 is formed from the first planar area A2 and the second planar area B2 defined on the reference plane K2, and the concavo-convex portion is configured. The first reference area 213 is distributed to either the first protruding area A1 or the first planar area A2, and the second reference area 223 is distributed to either the second protruding area B1 or the second planar area B2. Depending on, the configuration of the concavo-convex portion changes.

The plate material formed based on the second reference plane K2 shown in FIG. 22 of this example has an effect of improving the rigidity, and the rigidity anisotropy can be changed by changing the configuration of the concavo-convex part. it can. In addition, it is possible to improve the formability of the plate material having the concavo-convex portion, expand the application, or improve the design.
The arrangement of the unit regions 24 arranged on the second reference plane K2 can be changed as in the third embodiment. In this example, the inclination angle α of the contour line is set to 20 °, but the present invention is not limited to this.

(Example 7)
In this example, as shown in FIG. 23, the concave and convex portion 20 is provided in the cylindrical material 11. In this example, the first reference surface K1 and the second reference surface K2 are formed by cylindrical curved surfaces arranged in parallel. The second reference surface K2 of this example is obtained by curving the second reference surface K2 having a planar shape in any one of the first to sixth embodiments into a cylindrical shape. The configurations of the first region 21, the second region 22, and the planar region 23 that form the uneven portion 20 are the same as those in the first to third embodiments.
As shown in this example, the plate member 1 having the concavo-convex portion 20 having excellent characteristics can be deformed into various shapes, and the application can be expanded.

  Moreover, rigidity can be improved without increasing the plate | board thickness of material by using the cylindrical material 11 which has the uneven | corrugated | grooved part 20 shown in this example for cylindrical structures, such as a drink can and a rocket. Further, the cylindrical material 11 of this example has excellent energy absorption characteristics. Therefore, high rigidity and excellent energy absorption characteristics can be imparted by using it in a vehicle body such as an automobile.

(Example 8)
In this example, as shown in FIG. 24, the laminated structure 5 is configured by using the plate material 1 having the concavo-convex portion 20 of Example 2 as a core material.
That is, the laminated structure 5 is formed by bonding the face plates 42 and 43 to the surfaces on both sides of the core material made of the single plate material 1 having the uneven portion 20.
The face plates 42 and 43 are made of an aluminum alloy plate having a material of 3000 series and a plate thickness of 1.0 mm.

  The laminated structure 5 of this example uses the plate material 1 having the uneven portion 20 having excellent rigidity as described above as a core material, and the first top surface 211 of the first region 21 and the flat portion 231 of the flat region 23. On the other hand, by joining the face plates 42 and 43 by bonding, brazing, or the like, the laminated structure 5 having a remarkably higher rigidity than the case of the plate 1 having the concavo-convex portion 20 is obtained. Moreover, since both the plate 1 and the face plates 42 and 43 are made of an aluminum alloy plate, the weight can be reduced.

In addition, it is possible to obtain the effect of improving the vibration damping property accompanying the improvement of rigidity and the effect of improving the sound absorption by enclosing the air layer. As is well known, by forming a through hole in one of the face plates 42 and 43, a Helmholtz type sound absorbing structure is obtained, and the sound absorbing property can be further improved.
As the face plate, a metal plate other than an aluminum alloy, for example, a steel plate, a titanium plate, or a resin plate can be applied.

Example 9
In this example, as shown in FIG. 25, the plate 1 described in Examples 1 to 6 is used as the inner panel, and the surface on the second reference plane K <b> 2 side of the plate 1 is arranged toward the back side of the outer panel 61. This is an example of a vehicle panel 6 configured as described above. The inner panel is joined to the outer panel 61 by hem processing or the like at the outer peripheral portion thereof. In the inner panel described above, the formation direction of the concavo-convex portion 20 is not limited, and the first reference surface K1 side surface of the plate member 1 may be disposed toward the back surface side of the outer panel 61. .

In the vehicle panel 6 of this example, since the plate 1 having the concavo-convex portion 20 constituting the inner panel is excellent in the rigidity improving effect as described above, the energy of the primary collision and the secondary collision when the pedestrian collides. It is excellent in the property of absorbing the energy. In addition, it is possible to obtain the effect of improving the vibration damping property accompanying the improvement of the rigidity and the effect of improving the sound absorption by enclosing the air layer.
In addition, in this example, although the board | plate material 1 which has the uneven | corrugated | grooved part 20 was used as an inner panel, it can be used for any one or both of an inner panel and an outer panel.

DESCRIPTION OF SYMBOLS 1 Board | plate material 20 Uneven part 21 1st area | region 211 1st top surface 212 1st side surface 213 1st reference area 22 2nd area | region 221 2nd top surface 222 2nd side surface 223 2nd reference area 23 Planar area 231 Planar part 24 Unit area 241 1st ridge 242 2nd ridge 5 Laminated structure 6 Vehicle panel A1 1st protrusion area A2 1st plane area B1 2nd protrusion area B2 2nd plane area K1 1st reference plane K2 2nd reference plane

Claims (12)

It is a plate material that has increased rigidity by forming uneven portions,
The concavo-convex portion is based on a first reference surface and a second reference surface, which are two virtual surfaces arranged in parallel with a gap therebetween,
Assuming that the second reference plane is covered with unit areas that are virtual squares of the same size, each unit area is virtually divided by a grid obtained by dividing the unit area vertically and horizontally by an integer n of 4 or more. The cells are classified into two types, a first cell and a second cell, and each column and each row of the cells always include both the first cell and the second cell, and the same type is vertically or The total number of the first ridges and the total number of the ^second ridges in the unit region are both in the range of n ² /2±0.5. An integer, a region that is connected to the first ridges is a first reference region, and a region that is connected to the second ridge is a second reference region,
The first reference area distributes a part of the first reference area to the first protruding area and distributes the remaining first reference area other than the first protruding area to the first plane area, or Distributing the entire area of the first reference area to the first protruding area;
The second reference area distributes a part of the second reference area to the second protruding area and distributes the remaining second reference area other than the second protruding area to the second plane area, or Distributing the entire area of the second reference area to either the second protruding area or the second planar area;
A first region projecting from the first projecting region defined on the second reference surface toward the first reference surface; and a first region projecting from the second projecting region defined on the second reference surface. A second region projecting toward the reference surface, and a planar region composed of the first planar region and the second planar region defined on the second reference surface,
The first region includes a first top surface obtained by projecting the first projecting region on the first reference plane with the same magnification or reduction, and a contour of the first top surface and a contour of the first projecting region. The first side to be connected,
The second region includes a second top surface obtained by projecting the second projecting region on the first reference plane with the same magnification or reduction, an outline of the second top surface, and an outline of the second reference region. A plate material having an uneven portion, characterized in that the planar region comprises a planar portion formed by the contours of the first planar region and the second planar region.   The plate material having an uneven portion according to claim 1, wherein 4 ≦ n ≦ 10.   In the board | plate material which has an uneven | corrugated | grooved part as described in any one of Claim 1 or 2, a said 1st reference | standard area | region and a said 2nd reference | standard area | region are both after connecting the said 1st ridge and the said 2nd ridge, respectively. A plate having an uneven portion, characterized in that a part of both corners is deformed into an arc shape so that the area does not change.   In the board | plate material which has an uneven | corrugated | grooved part as described in any one of Claims 1-3, the said 1st reference | standard area | region and the said 2nd reference | standard area | region are both after connecting the said 1st ridge and the said 2nd ridge, respectively. The board | plate material which has an uneven | corrugated | grooved part characterized by being comprised by inclining a part of boundary line | wire which makes so that both area may not change. In the board | plate material which has an uneven | corrugated | grooved part of any one of Claims 1-4, inclination | tilt angle (theta) ₁ (degree) of the said 1st side surface with respect to the said 2nd reference surface and the said 2nd side surface with respect to the said 2nd reference surface. The inclination angle θ ₂ (°) is a plate material having an uneven portion characterized by being in a range of 10 ° to 90 °.   In the board | plate material which has an uneven | corrugated | grooved part of any one of Claims 1-5, The uneven | corrugated | grooved part characterized by the at least one part of the said 1st reference surface and the said 2nd reference surface consisting of a parallel curved surface, respectively. Board material.   The plate having an uneven part according to any one of claims 1 to 6, wherein the plate is formed by pressing a metal plate to form the uneven part. .   The plate material having uneven portions according to claim 7, wherein a plate thickness t (mm) before forming the metal plate is 0.05 to 6.0 mm.   The plate material having an uneven portion according to claim 7 or 8, wherein a ratio L / t between a length L (mm) of one side of the square and the plate thickness t (mm) is 10 to 2000. A plate material having an uneven portion. In the board | plate material which has an uneven | corrugated | grooved part as described in any one of Claims 7-9, ratio of the distance H (mm) between the said 1st reference plane and the said 2nd reference plane, and the said board thickness t (mm). H / t and the largest inclination angle θ ₁ (°) formed by the first side surface and the second reference surface have a relationship of 1 ≦ (H / t) ≦ −3θ ₁ +272, and the second A plate material having an uneven portion, wherein the largest inclination angle θ ₂ (°) formed by the side surface and the second reference surface has a relationship of 1 ≦ (H / t) ≦ −3θ ₂ +272.   It is a laminated structure which laminates | stacks several board | plate materials, Comprising: At least 1 sheet of the said board | plate materials is a board | plate material which has the uneven | corrugated | grooved part of any one of Claims 1-10, The laminated structure characterized by the above-mentioned. .   It is a vehicle panel which has an outer panel and the inner panel joined to the back surface of this outer panel, Comprising: The said inner panel consists of a board | plate material which has an uneven | corrugated | grooved part of any one of Claims 1-10. Vehicle panel.

Images