JP5700767B2 - Plate material having concavo-convex part, vehicle panel and laminated structure using the same - Google Patents

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 three reference planes, a first reference plane, an intermediate reference plane, and a second reference plane, which are virtual three planes sequentially arranged in parallel at intervals,
The intermediate reference plane is assumed to be laid out with unit areas that are virtual hexagons,
One unit region is defined as a first hexagon, and four unit regions are formed by combining the three unit regions and the first hexagon that are in contact with every other non-continuous three sides of the first hexagon. The octagonal area is the first reference area,
The first reference area is located at a position where the position of the first hexagon is located by skipping two of the unit areas in three directions where there are unit areas combined with the first hexagon. All are scattered in the same posture as
Among the unit areas excluding the first reference area, the unit area in contact with the first hexagon is defined as a second reference area.
All of the remaining unit areas excluding the first reference area and the second reference area are defined as third reference areas,
Only the first reference region or a region obtained by combining the first reference region and a part of the third reference region is a new first reference region, and only the second reference region or the second reference region and the second reference region are combined. An area obtained by combining a part of the three reference areas is a new second reference area, and the third reference area not included in the new first reference area and the new second reference area is a new third reference area.
A first area protruding from the new first reference area defined on the intermediate reference plane toward the first reference plane, and a second area from the new second reference area defined on the intermediate reference plane. Providing a second region protruding toward the reference surface, and a third region formed on the intermediate reference surface based on the new third reference region defined on the intermediate reference surface;
The first region includes a first top surface obtained by projecting the new first reference region on the first reference surface with the same magnification or reduction, a contour of the first top surface, and a contour of the new first reference region. And the first side that connects
The second region includes a second top surface obtained by projecting the new second reference region on the second reference surface with the same magnification or reduction, a contour of the second top surface, and a contour of the new second reference region. And the second side connecting
The third region is a plate material having an uneven portion, characterized in that the third region is an intermediate surface formed on the intermediate reference surface based on the contour of the new third reference region.

2nd invention is the board | plate material which improved rigidity by forming an uneven | corrugated | grooved part,
The concavo-convex portion is based on three reference planes, a first reference plane, an intermediate reference plane, and a second reference plane, which are virtual three planes sequentially arranged in parallel at intervals,
The intermediate reference plane is assumed to be laid out with unit areas that are virtual hexagons,
One unit region is defined as a first hexagon, and four unit regions are formed by combining the three unit regions and the first hexagon that are in contact with every other non-continuous three sides of the first hexagon. The octagonal area is the first reference area,
The first reference area is located at a position where the position of the first hexagon is located by skipping two of the unit areas in three directions where there are unit areas combined with the first hexagon. All are scattered in the same posture as
Among the unit areas excluding the first reference area, the unit area in contact with the first hexagon is defined as a second reference area.
All of the remaining unit areas excluding the first reference area and the second reference area are defined as third reference areas,
Third reference area, to both the adjacent the first reference region and the second reference area, to distribute all of its area,
On SL regions coalesce at least a portion of the first reference region of the third reference area and the new first reference area, the total hand above do not form the New first reference region third reference region and the second The area combined with the two reference areas is the new second reference area,
A first area protruding from the new first reference area defined on the intermediate reference plane toward the first reference plane, and a second area from the new second reference area defined on the intermediate reference plane. Providing a second region protruding toward the reference plane;
The first region includes a first top surface obtained by projecting the new first reference region on the first reference surface with the same magnification or reduction, a contour of the first top surface, and a contour of the new first reference region. And the first side that connects
The second region includes a second top surface obtained by projecting the new second reference region on the second reference surface with the same magnification or reduction, a contour of the second top surface, and a contour of the new second reference region. It is in the board | plate material which has an uneven | corrugated | grooved part characterized by consisting of the 2nd side surface which connects with (Claim 2).

  A third invention is a laminated structure formed by laminating a plurality of plate materials, wherein at least one of the plate materials is a plate material having the uneven portion according to the first invention or the second invention. (10).

  4th 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 1st invention or 2nd. The vehicle panel is characterized by comprising a plate material having an uneven portion according to the invention.

  The board | plate material which has the said uneven | corrugated | grooved part in 1st invention has the uneven | corrugated | grooved part of said special shape. As described above, the concavo-convex portion is defined on the intermediate reference plane and the first area protruding from the new first reference area defined on the intermediate reference plane toward the first reference plane. Formed on the intermediate reference plane based on the second area protruding from the new second reference area toward the second reference plane and the new third reference area defined on the intermediate reference plane. And a third region. 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 new first reference region, and the second region includes the first surface. 2 top surfaces, and the second side surface connecting the contour of the second top surface and the contour of the new second reference region. In addition, the third area includes an intermediate surface formed based on the outline of the new third reference area.

Since it has such a structure, the plate material of the present invention is excellent in bending rigidity and surface rigidity, and becomes a plate material excellent in energy absorption characteristics.
The reason why the rigidity is improved is considered as follows. In other words, the first region and the second region are the first top surface and the second top surface arranged at positions separated in the thickness direction of the plate material, and the first side surface intersecting the thickness direction of the plate material. And many materials can be arrange | positioned in the position which consists of said 2nd side surface and was distant from the neutral surface. Therefore, many materials can be effectively used as the strength member, and the rigidity improvement effect can be enhanced.

  Moreover, the uneven | corrugated | grooved part shape in which the said uneven | corrugated | grooved part shape has a rigid improvement effect is formed in any direction on the surface of a board | plate material. Therefore, anisotropy is very small and a high rigidity improvement effect can be obtained. 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.

  The board | plate material which has the said uneven | corrugated | grooved part in 2nd invention distribute | distributes all the said 3rd reference | standard area | regions arbitrarily to both the said 1st reference | standard area | region and the said 2nd reference | standard area | region which adjoin each other. Then, only the first reference area or an area obtained by combining the first reference area and the third reference area is set as a new first reference area, and only the second reference area or the second reference area and the third reference area are combined. A region combined with the reference region is defined as a new second reference region. The first reference region protrudes from the new first reference region toward the first reference surface, and the second region protrudes from the new second reference region toward the second reference surface. 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 new first reference region, and the second region includes the second top surface. And the second side surface connecting the contour of the second top surface and the contour of the new second reference region.

Thus, the board | plate material which has the said uneven | corrugated | grooved part does not have an intermediate surface, can use more materials effectively as an intensity | strength member, and can raise the rigidity improvement effect more. 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 suppressing the sound echo due to the uneven shape.
Moreover, the uneven | corrugated | grooved part shape in which the said uneven | corrugated | grooved part shape has a rigid improvement effect is formed in any direction on the surface of a board | plate material. Therefore, a high rigidity improvement effect can be obtained in any direction.

  In the third aspect of the present invention, a laminate structure having very high rigidity can be easily obtained by using a plate member having an uneven portion with excellent rigidity as part of the laminate structure 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 fourth aspect of the invention, by using the plate material having the uneven portion with high rigidity as described above for one or both of the outer panel and the inner panel, it is possible to easily obtain a vehicle panel with extremely high rigidity. it can. 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.

FIG. 3 is a partial plan view of a concavo-convex part in Example 1. The elements on larger scale of the AA arrow cross section of FIG. FIG. 3 is a partial perspective view of an uneven portion in Example 1. FIG. 3 is an explanatory diagram illustrating an arrangement of a first reference area, a second reference area, and a third reference area on the intermediate reference surface in the first embodiment. FIG. 6 is an explanatory diagram illustrating an arrangement of a new first reference area, a new second reference area, and a new third reference area on the intermediate reference surface in the first embodiment. FIG. 6 is a partial plan view of an uneven portion in Example 2. The elements on larger scale of the BB line arrow cross section of FIG. FIG. 9 is a partial perspective view of a concavo-convex part in Example 2. FIG. 6 is an explanatory diagram showing an arrangement of a new first reference area and a new second reference area on an intermediate reference surface in Embodiment 2. Explanatory drawing which shows the 3 point | piece bending test method in Example 2. FIG. The load-displacement diagram of the three-point bending test in Example 2. FIG. FIG. 9 is a partial perspective view of a concavo-convex part in Example 3. FIG. 9 is a partial perspective view of a concavo-convex part in Example 4. Explanatory drawing which shows arrangement | positioning of the new 1st reference area | region and new 2nd reference area | region in the intermediate | middle reference plane in Example 4. FIG. Explanatory drawing which shows the cylindrical material which has an uneven | corrugated | grooved part in Example 5. FIG. Explanatory drawing of the laminated structure in Example 6. FIG. Explanatory drawing of the vehicle panel in Example 7. FIG.

In the present invention, an octagon refers to a figure having 18 sides and 18 vertices, and the vertices are formed in a convex or concave shape. In addition, the expression of shapes such as an octagon and a hexagon is not limited to a narrowly defined concept in terms of geometry, and generally includes shapes that can be recognized as the above shapes. Naturally, it is permissible to provide curved surfaces called so-called fillets that cause rounding or the like necessary for molding at corners or surfaces.
Further, in the present invention, the expression “parallel” is not limited to a geometrically narrow concept, and may be any expression that can be generally recognized as parallel.

  In addition, the first top surface and the second top surface may be configured by surfaces on the first reference surface and the second reference surface, respectively, or alternatively, the first reference surface and the second reference surface. It can also be comprised by the site | part which protruded in the direction opposite to the said intermediate | middle reference plane from the surface. 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.

  Further, the new first reference area is an area obtained by combining only the first reference area or the first reference area and the third reference area. Therefore, when the first reference area and the third reference area are not merged, the areas indicated by the new first reference area and the first reference area are the same. Similarly, the new second reference region is a region in which only the second reference region or the second reference region and the third reference region are combined. Therefore, when the second reference area and the third reference area are not merged, the areas indicated by the new second reference area and the second reference area are the same. The new third reference region is a region formed of the third region that is not included in the new first reference region and the new second reference region. For this reason, when the areas indicated by the new first reference area and the first reference area are the same, and the areas indicated by the new second reference area and the second reference area are the same, The areas indicated by the three reference areas and the third reference area are the same.

In the method of distributing the third reference area to the first reference area and the second reference area on the intermediate reference plane, all or a part of the third reference area is distributed to the first reference area and the second reference area. It may be distributed to either one or both. When distributing the third reference region to both the first reference region and the second reference region, the distribution method can be changed as appropriate in order to obtain a desired rigidity.
Preferably, the third reference area is regularly distributed to the first reference area or the second reference area, and the areas of the new first reference area and the new second reference area are substantially the same. The plate material having the uneven portion composed of the intermediate reference surface thus distributed is an excellent plate material with little rigidity anisotropy.

In the plate member having the concavo-convex portion, the intermediate reference plane may be formed by spreading a first unit region and a second unit region made of two types of hexagons having different shapes.
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.

In the plate having the concavo-convex portion, the inclination angle θ ₁ of the first side surface with respect to the intermediate reference surface and the inclination angle θ ₂ of the second side surface with respect to the intermediate reference surface are in the range of 10 ° to 90 °. (Claim 4).
When the inclination angle θ ₁ of the first side surface and the inclination angle θ ₂ of the second side surface with respect to the intermediate reference surface are in the range of 10 ° to 90 °, excellent rigidity improvement rate while ensuring moldability The uneven | corrugated | grooved part shape which has can be obtained.

If the inclination angle theta ₂ of the inclination angle theta ₁ and the second side of the first side surface is smaller than 10 °, the above amount of protrusion of the first region and the second region is reduced, 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 more preferably 70 ° or less from the viewpoint of formability. 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 material having the concavo-convex portion, it is preferable that at least a part of the first reference surface, the intermediate reference surface, and the second reference surface that are sequentially arranged are each a parallel curved surface.
In this case, it is possible to deform the plate material having the above-described uneven portion having high rigidity into various shapes, and the application can be expanded.

In the plate 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.

Further, in the plate material having the concavo-convex portion, it is preferable that a plate thickness t before forming the metal plate is 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 concavo-convex portion, when the interval formed by the opposing sides of the hexagon forming the unit region is S (mm), the ratio S / t between the interval S (mm) and the plate thickness t (mm). Is preferably 5 to 2000 (claim 8).
If the ratio S / t is less than 5, molding may be difficult. On the other hand, if the ratio S / 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 concavo-convex portion, the ratio H1 / t between the protrusion height H1 (mm) of the first region and the plate thickness t (mm), and the largest formed by the first side surface and the intermediate reference surface. The inclination angle θ ₁ (°) has a relationship of 1 ≦ (H1 / t) ≦ −3θ ₁ +272, and the ratio between the protrusion height H2 (mm) of the second region and the plate thickness t (mm). H2 / t and the largest inclination angle θ ₂ (°) formed by the second side surface and the intermediate reference surface preferably have a relationship of 1 ≦ (H2 / t) ≦ −3θ ₂ +272 (claims) Item 9).
When the ratio H1 / t is less than 1, there may be a problem that the effect of improving the rigidity by forming the first region cannot be obtained sufficiently. On the other hand, when the ratio H1 / t exceeds −3θ ₁ +272, there is a possibility that a problem that molding becomes difficult may occur. Similarly, when the ratio H2 / 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 H2 / 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 third 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.
Further, it is also possible to take 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.
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 fourth invention is not limited to automobile hoods, but can be applied to panels and reinforcing members such as doors, roofs, floors, 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 formed 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. 1 shows a plan view of a part of the uneven portion 20. In the drawing, the outlines of the new first reference area 213 (FIG. 5) and the new second reference area 223 (FIG. 5) on the intermediate reference plane K3, which do not appear as outlines, are indicated by broken lines (described later). This also applies to FIGS. 3, 6, 8, 12, 13, and 16.

  FIG. 4 shows the shape of the concavo-convex portion 20 of the plate 1 by the arrangement of the first reference region 214, the second reference region 224, and the third reference region 234 before distribution on the intermediate reference plane K3. In the figure, the solid lines indicate the contour lines of the first reference region 214, the second reference region 224, and the third reference region 234. Moreover, the symbol described inside each outline represents which area | region corresponds to the area | region, A1 is the 1st reference area 214, A2 is the 2nd reference area 224, A3 is the 3rd reference area. 234 is shown.

  FIG. 5 shows the shape of the concavo-convex portion 20 of the plate 1 by the arrangement of the new first reference region 213, the new second reference region 223, and the new third reference region 233 in the intermediate reference plane K3. In the figure, solid lines indicate the contour lines of the new first reference region 213, the new second reference region 223, and the new third reference region 233. In addition, the symbol written inside each contour line indicates which region the region corresponds to, and B1 is a new first reference region 213, B2 is a new second reference region 223, and B3 is a new one. Three reference areas 233 are shown. In addition, the unit area 24 indicated as (A3) is obtained by distributing the third reference area 234 to the second reference area 224.

The plate material 1 having the concavo-convex portion 20 of this 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, three reference planes, ie, a first reference plane K1, an intermediate reference plane K3, and a second reference plane K2, which are three virtual planes sequentially arranged in parallel at intervals, are used as a reference. As shown in FIG. 4, the intermediate reference plane K3 is assumed to be covered with unit regions 24 that are virtual regular hexagons. Arbitrary one unit region 24 is defined as a first hexagon 215, and four unit regions 24 that are in contact with every other three non-continuous sides of the first hexagon 215 and the first hexagon 215 are combined. An octagonal area composed of two unit areas 24 is defined as a first reference area 214.

  The first reference region 214 skips two unit regions 24 in three directions A, B, and C where the unit region 24 merged with the first hexagon 215 exists at the position where the first hexagon 215 exists. Are all scattered in the same posture so that they are located at the same position. Of the unit areas 24 excluding the first reference area 214, the unit area 24 in contact with the first hexagon 215 is defined as the second reference area 224, and all the remaining areas except for the first reference area 214 and the second reference area 224 are used. The unit area 24 is defined as a third reference area 234.

  As shown in FIG. 5, the third reference area 234 distributes a part of the area to the adjacent second reference area 224. Then, an area including only the first reference area 214 is referred to as a new first reference area 213. Further, an area obtained by combining the second reference area 224 and a part of the third reference area 234 is referred to as a new second reference area 223. The third reference region 234 that is not included in the new first reference region 213 and the new second reference region 223 is referred to as a new third reference region 233.

The distribution method of the third reference area 234 in this example will be described below. In this example, as shown in FIGS. 4 and 5, the interval S between the opposing sides of the unit region 24 having a regular hexagonal shape is 10 mm, and the intermediate reference plane K3 laid with the unit region 24 is 60 mm × 52 mm. A region divided into two is defined as a basic region 25 (FIGS. 4 and 5). In the basic region 25, any one of the eight third reference regions 234 formed is distributed as the distribution hexagon 225 to the second reference region 224. Then, from the distribution hexagon 225, three third reference regions 234 that are present by skipping two unit regions 24 in any of the three directions A, B, and C are also distributed to the second reference region 224. did.

By distributing the third reference region 234 as described above, the areas of the first reference region 214 and the second reference region 224 are the same and regularly arranged. The plate 1 having the concavo-convex portion 20 composed of the intermediate reference plane K3 distributed in this manner is an excellent plate with little rigidity anisotropy.
In addition, the distribution method of the 3rd reference area | region 234 in this example is one example, and is not limited to this.

  As shown in FIGS. 1 and 2, the concavo-convex portion 20 has a first region 21 protruding from the new first reference region 213 defined on the intermediate reference surface K3 toward the first reference surface K1, and an intermediate reference surface K3. A second region 22 that protrudes from the determined new second reference region 223 toward the second reference surface K2 is formed. Further, the concavo-convex portion 20 forms a third region 23 formed on the intermediate reference surface K3 based on the new third reference region 233 defined on the intermediate reference surface K3.

  The first region 21 includes a first top surface 211 obtained by projecting the new first reference region 213 on the first reference surface K1, a contour of the first top surface 211, and a contour of the new first reference region 213. And a first side surface 212 connecting the two. Similarly, the second region 22 includes a second top surface 221 obtained by projecting the new second reference region 223 on the second reference surface K2, and the outline of the second top surface 221 and the new second reference region 223. And a second side surface 222 that connects the contours of the two. The third region 23 includes an intermediate surface 231 formed on the intermediate reference surface K3 based on the outline of the new third reference region 233.

Further, as shown in FIG. 2, the three reference planes of the first reference plane K1, the intermediate reference plane K3, and the second reference plane K2 in this example are parallel planes.
The first top surface 211 is configured such that the thickness center thereof overlaps with the first reference plane K1, and the second top surface 221 is configured so that the thickness center thereof overlaps with the second reference plane K2. Yes. The distance formed by the first reference surface K1 and the intermediate reference surface K3 is defined as a protrusion height H1, and the distance formed by the second reference surface K2 and the intermediate reference surface K3 is defined as a protrusion height H2.
In this example, the protrusion height H1 of the first region 21 and the protrusion height H2 of the second region 22 are both 0.6 mm.

Further, as shown in FIG. 2, the inclination angle θ ₁ of the first side surface 212 with respect to the intermediate reference plane K3 and the inclination angle θ ₂ of the second side surface 222 with respect to the intermediate reference plane K3 are equal, and θ ₁ = θ ₂ = 45 °. The first side surface 212 and the second side surface 222 are formed continuously in one plane without having a bent portion.
Further, the plate material 1 having the concavo-convex portion 20 of this example is a 1000 series aluminum plate having a plate thickness t = 0.4 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.

Further, the distance S between opposite sides of the regular hexagon forming the unit region 24 is 10 (mm). The ratio S / t between the distance S (mm) and the plate thickness t (mm) is 25, and S / t is in the range of 5 to 2000.
The ratio H1 / t between the protrusion height H1 (mm) of the first region 21 and the plate thickness t (mm) is 1.5. Further, the inclination angle θ ₁ = 45 ° formed by the first side surface 212 and the intermediate reference surface K3 is −3θ ₁ + 272 = 137. Therefore, the relationship of 1 ≦ H1 / t ≦ 137 is satisfied. Similarly, the ratio H2 / t between the protrusion height H2 (mm) of the second region 22 and the plate thickness t (mm) is 1.5. Further, the inclination angle θ ₂ = 45 ° formed by the second side surface 222 and the intermediate reference surface K3 is −3θ ₂ + 272 = 137. Therefore, the relationship of 1 ≦ H2 / t ≦ 137 is satisfied.

  The board | plate material 1 which has the uneven | corrugated | grooved part 20 in this example has the uneven | corrugated | grooved part 20 of said special shape. As described above, the concavo-convex portion 20 is defined on the intermediate reference surface K3 and the first region 21 protruding from the new first reference region 213 defined on the intermediate reference surface K3 toward the first reference surface K1. Formed on the intermediate reference surface K3 based on the second region 22 protruding from the new second reference region 223 toward the second reference surface K2 and the new third reference region 233 defined on the intermediate reference surface K3. The third region 23 is provided.

  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 new first reference region 213, and the second region 22 includes 2 top surfaces 221, and a second side surface 222 connecting the contour of the second top surface 221 and the contour of the new second reference region 223. The third area 23 includes an intermediate surface 231 formed based on the outline of the new third reference area 233.

Since it has such a structure, the plate material 1 of this example is excellent in bending rigidity and surface rigidity, and becomes a plate material excellent in energy absorption characteristics. 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 suppressing the sound echo due to the uneven shape.
Moreover, the uneven | corrugated | grooved part 20 has the uneven | corrugated | grooved part which has a rigid improvement effect in any direction on the surface of a board | plate material. Therefore, anisotropy is very small and a high rigidity improvement effect can be obtained.

(FEM analysis)
In order to quantitatively judge the rigidity improvement effect of the plate material 1 of this example, a bending rigidity evaluation by a cantilever beam using FEM analysis and a three-point bending test were performed.
The FEM analysis was performed with two patterns of 0 ° direction and 90 ° direction with respect to the formation direction of the uneven portion 20.

<Evaluation of bending stiffness by cantilever>
The shape of the test piece used for the FEM analysis of the cantilever has a rectangular shape of 120 mm × 120 mm, and the uneven portion 20 is formed on the entire surface. The plate thickness was t = 0.4 mm.
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 two end portions arranged in parallel with the direction B, a direction in which one end portion Z1 is a fixed end and an end portion Z2 opposite to Z1 is a free end is defined as a 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 3.9 times compared to a flat plate.
<90 ° direction>
As shown in FIG. 1, a direction in which one end Z3 in a direction orthogonal to the ends Z1 and Z2 is a fixed end and an end Z4 opposite to Z3 is a free end is a 90 ° 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 4.2 times compared to a flat plate.

(Example 2)
A plate 1 having an uneven portion 20 according to an embodiment of the second invention will be described with reference to FIGS.
As shown in FIG. 4, this example is divided into a first reference area 214, a second reference area 224, and a third reference area 234 as in the first embodiment, and then, as shown in FIG. In this example, all the third reference regions 234 are distributed to the adjacent first reference region 214 and second reference region 224 so that the areas of the second reference region 223 and the new second reference region 223 are substantially the same.

  In FIG. 9, the solid lines indicate the contour lines of the new first reference area 213 and the new second reference area 223. Moreover, the symbol described inside each outline represents which area | region corresponds to the area | region, B1 has shown the new 1st reference area | region 213, B2 has shown the new 2nd reference area | region 223, respectively. . Further, the unit area 24 indicated as (A3) is obtained by distributing the third reference area 234 to the first reference area 214 or the second reference area 224.

As shown in FIGS. 6 to 9, the uneven portion 20 of this example includes a first region 21 protruding from the new first reference region 213 defined on the intermediate reference surface K3 toward the first reference surface K1, and an intermediate reference. The second region 22 protrudes from the new second reference region 223 defined on the surface K3 toward the second reference surface K2.
The first region 21 includes a first top surface 211 obtained by projecting the new first reference region 213 on the first reference surface K1, a contour of the first top surface 211, and a contour of the new first reference region 213. And a first side surface 212 connecting the two. Similarly, the second region 22 includes a second top surface 221 obtained by projecting the new second reference region 223 on the second reference surface K2, and the outline of the second top surface 221 and the new second reference region 223. And a second side surface 222 that connects the contours of the two. Other configurations are the same as those of the first embodiment.

A method of distributing the third reference region 234 to the first reference region 214 and the second reference region 224 in this example will be described below. In this example, as shown in FIGS. 4 and 5, the interval S between the opposing sides of the unit region 24 having a regular hexagonal shape is 10 mm. A basic area 25 (FIGS. 4 and 5) is defined as an area obtained by dividing the intermediate reference plane K3 on which the unit areas 24 are spread out into 60 mm × 52 mm. In the basic region 25, among the eight third reference regions 234 to be formed, two are distributed to the first reference region 214, and six are distributed to the second reference region 224 to be formed. The areas of the reference region 213 and the new second reference region 223 are substantially the same.

  At this time, the two third reference regions 234 arranged on the same column in any one of directions A, B, and C are distributed to the first reference region 214. In this example, as shown in FIG. 4, there are three columns arranged in the A direction and including two third reference regions 234. Among them, two third reference regions 234 arranged in one row are distributed to the first reference region 214, and the other third reference regions 234 are distributed to the second reference region 224. The intermediate reference plane K3 of this example is one in which the basic regions 25 obtained by the above-described method are arranged continuously in the vertical and horizontal directions.

Note that the three rows including the two third reference regions 234 arranged in the A direction are the same as the basic region 25 in the same posture even when any one row is distributed to the first reference region 214. The shape of the concavo-convex part 20 obtained continuously is the same.
Further, the distribution method of the third reference region 234 in this example is an example, and the present invention is not limited to this.

Further, as shown in FIG. 7, the protruding height H1 of the first region 21 and the protruding height H2 of the second region 22 are both 0.6 mm. In addition, the inclination angle θ ₁ of the first side surface 212 with respect to the intermediate reference plane K3 and the inclination angle θ ₂ of the second side surface 222 with respect to the intermediate reference plane K3 are equal, and θ ₁ = θ ₂ = 45 °. The second side surface 222 is formed continuously with one plane without having a bent portion. Other configurations are the same as those of the first embodiment.

In the plate 1 having the concavo-convex portion 20 in this example, the entire third reference region 234 was distributed to the adjacent first reference region 214 and second reference region 224. Then, a region where the first reference region 214 and the third reference region 234 are combined is referred to as a new first reference region 213, and a region where the second reference region 224 and the third reference region 234 are combined is a new second reference region. A region 223 is provided. The first region 21 protrudes from the new first reference region 213 toward the first reference surface K1, and the second region 22 protrudes from the new second reference region 223 toward the second reference surface K2. The first region 21, 1 and the first top surface 21 comprises a first side surface 212 connecting the contour of the first top surface 21 1 of the contour and the new first reference region 213, second region 22, the second the top surface 221, and a second side surface 222 connecting the contour of the second top surface 221 of the contour and the new second reference region 2 23.

Thus, the board | plate material 1 which has the uneven | corrugated | grooved part 20 of this example does not have an intermediate surface, but can use more material effectively as an intensity | strength member, and can raise a rigidity improvement effect more. it can. 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 suppressing the sound echo due to the uneven shape.
Moreover, the uneven | corrugated | grooved part 20 has the uneven | corrugated | grooved part which has a rigid improvement effect in any direction on the surface of a board | plate material. Therefore, a high rigidity improvement effect can be obtained in any direction.

  In order to quantitatively judge the rigidity improvement effect of the plate material 1 of this example, a bending rigidity evaluation by a cantilever beam using FEM analysis and a three-point bending test were performed.

(FEM analysis)
<Evaluation of bending stiffness by cantilever>
The bending rigidity evaluation by the cantilever using the FEM analysis was performed with two patterns of 0 ° direction and 90 ° direction with respect to the formation direction of the uneven portion 20.

The shape of the test piece used for the FEM analysis of the cantilever has a rectangular shape of 120 mm × 120 mm, and the uneven portion 20 is formed on the entire surface. The plate thickness was t = 0.4 mm.
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. 6, the two end portions arranged in parallel with the direction B at the end portion of the test piece have one end portion Z1 as a fixed end and the end portion Z2 opposite to Z1 as a free end. Was set to 0 °.
It has been clarified that the plate material 1 having the concavo-convex portion 20 of this example has a flexural rigidity improved by 4.8 times as compared with a flat plate.
<90 ° direction>
As shown in FIG. 6, the direction in which one end Z3 in a direction orthogonal to the ends Z1 and Z2 is a fixed end and the end Z4 opposite to Z3 is a free end is a 90 ° direction.
It has been clarified that the plate material 1 having the concavo-convex portion 20 of this example has a bending rigidity improved by 4.5 times compared to a flat plate.

(3-point bending test)
As shown in FIG. 10, the three-point bending test is performed by placing test pieces on two fulcrums W configured by arranging two laid down cylindrical support members in parallel so that the distance between the fulcrums L = 80 mm. A load was applied to the center position on one surface by a flat plate-shaped pressing jig J having a semicircular tip section, and the amount of displacement was measured. Evaluation was performed by similarly performing a three-point bending test on a flat base plate on which the concavo-convex portion 20 was not formed, and comparing load-displacement diagrams.
The test piece is an A3004-O material having a shape before molding of 100 mm × 100 mm and a plate thickness t = 0.3 mm, and the uneven portion 20 shown in this example is formed on the entire surface. The formation direction is the same as in the 0 ° direction and 90 ° direction of the FEM analysis in the cantilever.

  FIG. 11 shows a load-displacement diagram with the load obtained from the result of the three-point bending test as the vertical axis and the displacement as the horizontal axis. In the figure, the measurement result of the plate 1 provided with the uneven portion 20 in the 0 ° direction is a solid line X, the measurement result of the plate 1 provided with the uneven portion 20 in the 90 ° direction is the solid line Y, and the measurement result of the flat plate-shaped base plate. Is indicated by a solid line Z.

  As shown in FIG. 11, the solid line X has a rising inclination angle 5.2 times that of the solid line Z. Therefore, it was clarified that the bending rigidity of the plate 1 provided with the concavo-convex portion 20 in the 0 ° direction is improved by 5.2 times compared to the flat plate-like base plate. Further, the solid line Y has a rising inclination angle 4.5 times that of the solid line Z. Therefore, it has been clarified that the bending rigidity of the plate 1 provided with the concave and convex portions 20 in the 90 ° direction is improved 4.5 times as compared with the flat base plate.

(Example 3)
This example is a modification of the plate 1 having the concavo-convex portion 20 of Example 2, as shown in FIG.
The concavo-convex portion 20 of this example includes the intermediate reference plane K3 shown in FIG. 9 as in the second embodiment. The inclination angle θ ₁ (°) of the first side surface 212 relative to the intermediate reference plane K3 and the first reference to the intermediate reference plane K3. The inclination angles θ ₂ (°) of the two side surfaces 222 are both 30 °, and the first side surface 212 and the second side surface 222 are formed continuously in one plane without having a bent portion. Further, the projecting heights H1 and H2 of the first region 21 and the second region 22 are both 1.2 mm. Other configurations are the same as those of the first embodiment.

In this example, the plate thickness t is 0.4 mm as in the first embodiment, and the ratio H1 / t between the protruding height H1 (mm) of the first region 21 and the plate thickness t (mm) is 3. 0. Further, the inclination angle θ ₁ = 30 ° formed by the first side surface 212 and the intermediate reference plane K3 is −3θ ₁ + 272 = 182. Therefore, the relationship of 1 ≦ H1 / t ≦ 182 is satisfied. Similarly, the ratio H2 / t between the protrusion height H2 (mm) of the second region 22 and the plate thickness t (mm) is 3.0. Further, the inclination angle θ ₂ = 30 ° formed by the second side surface 222 and the intermediate reference surface K3 is −3θ ₂ + 272 = 182. Therefore, the relationship of 1 ≦ H2 / t ≦ 182 is satisfied.

(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 was performed by FEM analysis.
The FEM analysis was performed with two patterns of 0 ° direction and 90 ° direction with respect to the formation direction of the uneven portion 20.

<Evaluation of bending stiffness by cantilever>
The shape of the test piece used for the FEM analysis of the cantilever has a rectangular shape of 120 mm × 120 mm, and the uneven portion 20 is formed on the entire surface. The plate thickness t was set to 0.4 mm.
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. 12, in the end portion of the test piece, the two end portions arranged in parallel with the direction B have one end portion Z1 as a fixed end and the end portion Z2 opposite to Z1 as a free end. Was set to 0 °.
It was found that the plate material 1 having the concavo-convex portion 20 of Example 3 improved the bending rigidity to 9.4 times as compared with the flat base plate.
<90 ° direction>
As shown in FIG. 12, the direction in which one end Z3 in the direction orthogonal to the ends Z1 and Z2 is a fixed end and the end Z4 opposite to Z3 is a free end is a 90 ° direction.
It was found that the plate material 1 having the concavo-convex portion 20 of Example 3 improved the bending rigidity to 8.0 times compared to the flat plate. In addition, the same effects as those of the first embodiment are obtained.

Example 4
This example is a plate 1 having an uneven portion 20 shown in FIG. As shown in FIG. 14, the intermediate reference plane K <b> 3 of this example is assumed to be provided with a first unit region 241 and a second unit region 242 made of two types of hexagons having different shapes. FIG. 14 shows the shape of the concavo-convex portion 20 of the plate 1 by the arrangement of the new first reference region 213 and the new second reference region 223 on the intermediate reference plane K3. In the figure, the solid lines indicate the contour lines of the new first reference area 213 and the new second reference area 223. Moreover, the symbol described inside each outline represents which area | region corresponds to the area | region, B1 has shown the new 1st reference area | region 213, B2 has shown the new 2nd reference area | region 223, respectively. . The second unit region 242 indicated as (A3) is obtained by distributing the third reference region 234 to the first reference region 214 or the second reference region 224.

As shown in FIG. 14, the first unit region 241 has a hexagonal shape whose inner angles are all 60 °, and every other three non-contiguous sides in the hexagonal shape are long sides G1, and the length is 10. It was set to 00 mm. In addition, the three sides arranged between the long sides G1 in the hexagon were defined as short sides G2, and the length was 3.66 mm. At this time, the distance S1 between the opposing long side G1 and short side G2 is 11.83 mm.
Further, the first unit region 241 is formed of a regular hexagon surrounded by the short side G2 of the first unit region 241 after being continuously arranged so as to be line-symmetric with respect to the long side G1 forming the three sides. The region is a second unit region 242. At this time, the interval S2 (mm) between the opposing sides of the regular hexagon forming the second unit region 242 is 6.34 mm.

In this example, one second unit region 242 is a first hexagon 215, and the subsequent method for determining the first reference region 214, the second reference region 224, and the third reference region 234 is the same as in the first embodiment. It is.
As for the method of distributing the third reference region 234 to the first reference region 214 and the second reference region 224, three rows including two third reference regions 234 arranged in the A direction as in the first embodiment. Among these, the two third reference regions 234 arranged in any one row are distributed to the first reference region 214, and the third reference regions 234 arranged in the other two rows are distributed to the second reference region 224. And distributed.

Further, the interval S1 = 11.83 (mm) between opposite sides of the hexagon forming the first unit region 241. In this example, the plate thickness 1 (mm) of the plate 1 is 0.4 mm. Therefore, the ratio S1 / t between the distance S1 (mm) and the plate thickness t (mm) is 29.575, and S1 / t is in the range of 5 to 2000.
The interval S2 between the opposite sides of the regular hexagon forming the second unit region 242 is 6.34 mm. The ratio S2 / t between the distance S2 (mm) and the plate thickness t (mm) is 15.85, and S2 / t is in the range of 5 to 2000. Other configurations are the same as those of the first embodiment.

  The plate material 1 having the concavo-convex portion 20 of this example can improve the formability of the concavo-convex portion, expand the application, or improve the design. In addition, the same effects as those of the first embodiment are 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 was performed by FEM analysis.
The FEM analysis was performed with two patterns of 0 ° direction and 90 ° direction with respect to the formation direction of the uneven portion 20.

<Evaluation of bending stiffness by cantilever>
The shape of the test piece used for the FEM analysis of the cantilever has a rectangular shape of 120 mm × 120 mm, and the uneven portion 20 is formed on the entire surface. The plate thickness t was set to 0.4 mm.
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. 13, the two end portions arranged in parallel with the direction B at the end portion of the test piece have one end portion Z1 as a fixed end and the end portion Z2 opposite to Z1 as a free end. Was set to 0 °.
It was found that the plate material 1 having the concavo-convex portion 20 of Example 4 has a bending rigidity improved by 4.4 times compared to a flat plate.
<90 ° direction>
As shown in FIG. 13, the direction in which one end Z3 in the direction orthogonal to the ends Z1 and Z2 is a fixed end and the end Z4 opposite to Z3 is a free end is a 90 ° direction.
It was found that the plate material 1 having the concavo-convex portion 20 of Example 4 was improved in bending rigidity by 4.7 times compared to the flat base plate.

(Example 5)
In this example, as shown in FIG. 15, the concavo-convex portion 20 is provided on the cylindrical material 11. In this example, the first reference plane K1, the intermediate reference plane K3, and the second reference plane K2 are formed of cylindrical curved surfaces that are sequentially arranged in parallel. The intermediate reference plane K3 of this example is obtained by curving the intermediate reference plane K3 having a flat shape in any one of the first to third embodiments into a cylindrical shape. Other configurations are the same as those of the first embodiment.
As shown in this example, the plate member 1 having the excellent uneven portion 20 having high rigidity can be deformed into various shapes, and the application can be expanded. In addition, the same effects as those of the first embodiment are obtained.

  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 6)
In this example, as shown in FIG. 16, the laminated structure 5 is configured using the plate material 1 having the uneven portion 20 of Example 1 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 second region 22 of the second region 22. By bonding the face plates 42 and 43 to the top surface 221 by bonding, brazing, or the like, the laminated structure 5 having a remarkably higher rigidity than that of a single plate material having the uneven 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.

Further, the plate member 1 having the uneven portion 20 of the first embodiment has an intermediate surface 231, and when the laminated structure 5 is configured, a gap through which air can flow is provided between the face plates 42 and 43 and the plate member 1. It is formed. The laminated structure 5 has excellent heat dissipation performance due to the increase in the surface area and the formation of the voids by forming the concavo-convex portion 20 on the plate 1.
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 7)
In this example, as shown in FIG. 17, the plate material 1 described in the first to fourth embodiments is used as an inner panel, and the first top surface 211 of the first region 21 is arranged toward the back side of the outer panel 61. It is an example of the vehicle panel 6 comprised. The inner panel is joined to the outer panel 61 at the outer peripheral portion by hem processing or the like.

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 New 1st reference area 214 1st reference area 215 1st hexagon 22 2nd area | region 221 2nd top surface 222 2nd side surface 223 New 2 reference area 224 2nd reference area 234 3rd reference area 24 unit area 241 1st unit area 242 2nd unit area 25 basic area 5 laminated structure 6 vehicle panel

Claims (11)

It is a plate material that has increased rigidity by forming uneven portions,
The concavo-convex portion is based on three reference planes, a first reference plane, an intermediate reference plane, and a second reference plane, which are virtual three planes sequentially arranged in parallel at intervals,
The intermediate reference plane is assumed to be laid out with unit areas that are virtual hexagons,
One unit region is defined as a first hexagon, and four unit regions are formed by combining the three unit regions and the first hexagon that are in contact with every other non-continuous three sides of the first hexagon. The octagonal area is the first reference area,
The first reference area is located at a position where the position of the first hexagon is located by skipping two of the unit areas in three directions where there are unit areas combined with the first hexagon. All are scattered in the same posture as
Among the unit areas excluding the first reference area, the unit area in contact with the first hexagon is defined as a second reference area.
All of the remaining unit areas excluding the first reference area and the second reference area are defined as third reference areas,
Only the first reference region or a region obtained by combining the first reference region and a part of the third reference region is a new first reference region, and only the second reference region or the second reference region and the second reference region are combined. An area obtained by combining a part of the three reference areas is a new second reference area, and the third reference area that is not included in the new first reference area and the new second reference area is a new third reference area. ,
A first area protruding from the new first reference area defined on the intermediate reference plane toward the first reference plane, and a second area from the new second reference area defined on the intermediate reference plane. Providing a second region protruding toward the reference surface, and a third region formed on the intermediate reference surface based on the new third reference region defined on the intermediate reference surface;
The first region includes a first top surface obtained by projecting the new first reference region on the first reference surface with the same magnification or reduction, a contour of the first top surface, and a contour of the new first reference region. And the first side that connects
The second region includes a second top surface obtained by projecting the new second reference region on the second reference surface with the same magnification or reduction, a contour of the second top surface, and a contour of the new second reference region. And the second side connecting
The plate material having an uneven portion, wherein the third region is an intermediate surface formed on the intermediate reference surface based on an outline of the new third reference region. It is a plate material that has increased rigidity by forming uneven portions,
The concavo-convex portion is based on three reference planes, a first reference plane, an intermediate reference plane, and a second reference plane, which are virtual three planes sequentially arranged in parallel at intervals,
The intermediate reference plane is assumed to be laid out with unit areas that are virtual hexagons,
One unit region is defined as a first hexagon, and four unit regions are formed by combining the three unit regions and the first hexagon that are in contact with every other non-continuous three sides of the first hexagon. The octagonal area is the first reference area,
The first reference area is located at a position where the position of the first hexagon is located by skipping two of the unit areas in three directions where there are unit areas combined with the first hexagon. All are scattered in the same posture as
Among the unit areas excluding the first reference area, the unit area in contact with the first hexagon is defined as a second reference area.
All of the remaining unit areas excluding the first reference area and the second reference area are defined as third reference areas,
Third reference area, to both the adjacent the first reference region and the second reference area, to distribute all of its area,
On SL regions coalesce at least a portion of the first reference region of the third reference area and the new first reference area, the total hand above do not form the New first reference region third reference region and the second The area combined with the two reference areas is the new second reference area,
A first area protruding from the new first reference area defined on the intermediate reference plane toward the first reference plane, and a second area from the new second reference area defined on the intermediate reference plane. Providing a second region protruding toward the reference plane;
The first region includes a first top surface obtained by projecting the new first reference region on the first reference surface with the same magnification or reduction, a contour of the first top surface, and a contour of the new first reference region. And the first side that connects
The second region includes a second top surface obtained by projecting the new second reference region on the second reference surface with the same magnification or reduction, a contour of the second top surface, and a contour of the new second reference region. The board | plate material which has an uneven | corrugated | grooved part characterized by consisting of the 2nd side surface which connects.   In the board | plate material which has an uneven | corrugated | grooved part of Claim 1 or 2, it was assumed that the said intermediate | middle reference plane spread | laid the 1st unit area | region and 2nd unit area | region which consist of two types of hexagons from which a shape differs. A plate material having a featured uneven portion. In the board | plate material which has an uneven | corrugated | grooved part as described in any one of Claims 1-3, The inclination | tilt angle (theta) ₁ of the said 1st side surface with respect to the said intermediate | middle reference plane, The inclination | tilt angle (theta) _{2 of the} said 2nd side surface with respect to the said intermediate | middle reference plane, Is a plate having an uneven portion, characterized in that it is in the range of 10 ° to 90 °.   In the board | plate material which has an uneven | corrugated | grooved part of any one of Claims 1-4, at least one part of the said 1st reference plane, the said intermediate | middle reference plane, and the said 2nd reference plane which were distribute | arranged sequentially from a parallel curved surface, respectively. The board | plate material which has an uneven | corrugated | grooved part characterized by becoming.   The plate material having an uneven portion according to any one of claims 1 to 5, wherein the plate material is formed by pressing a metal plate to form the uneven portion. .   The board | plate material which has an uneven | corrugated | grooved part of Claim 6 WHEREIN: The board thickness t (mm) before shaping | molding of the said metal plate is 0.05-6.0 mm, The board | plate material which has an uneven | corrugated | grooved part characterized by the above-mentioned.   The plate material having an uneven portion according to claim 6 or 7, wherein an interval formed by opposing sides of the hexagon forming the unit region is S (mm) and the interval S (mm) and the plate thickness t (mm The ratio S / t is 5 to 2000. In the board | plate material which has an uneven | corrugated | grooved part as described in any one of Claims 6-8, ratio H1 / t of the protrusion height H1 (mm) of the said 1st area | region and the said board thickness t (mm), and the said 1st The largest inclination angle θ ₁ (°) formed by one side surface and the intermediate reference surface has a relationship of 1 ≦ (H1 / t) ≦ −3θ ₁ +272, and the protrusion height H2 (mm) of the second region. ) And the plate thickness t (mm), and the largest inclination angle θ ₂ (°) formed by the second side surface and the intermediate reference surface is 1 ≦ (H2 / t) ≦ −. A plate material having a concavo-convex portion, characterized by having a relationship of 3θ ₂ +272.   A laminated structure formed by laminating a plurality of plate members, wherein at least one of the plate members is a plate member having an uneven portion according to any one of claims 1 to 9. .   It 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 the said inner panel are any one of Claims 1-9. A vehicle panel comprising a plate having an uneven portion.

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