JP2012030261A - Plate material having concavo-convex part, and vehicle panel and laminated structure using the same plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate material having a pattern of a concavo-convex part which exerts improved rigidity, and to provide a laminated structure using the same plate material.SOLUTION: A plate material 1 is made to have improved rigidity by forming a concavo-convex part 20. A first reference face K1, an intermediate reference face K3, and a second reference face K2 are used as references. It is assumed that the intermediate reference face K3 is formed by closely laying unit areas, each of which consists of one unit area 23 of square, and the intermediate reference face K3 is classified into a first reference area 213 and a second reference area 223. The first reference area 213 and the second reference area 223 are alternately arranged on each of longitudinal rows and lateral rows on the intermediate reference face K3. The plate material 1 consists of a first area 21, which extends from the first reference area 213 to the first reference face K1, and a second area 22, which extends from the second reference area 22 to the second reference face K2. The first area 21 consists of a first top face 211 and a first side face 212, and the second area 22 consists of a second side face 222.

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 2-6).

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 Japanese Patent Laying-Open No. 2002002218

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.

  The present invention has been made in view of such problems, and is a plate material that has improved rigidity by providing uneven portions, and has a pattern of uneven portions having a high rigidity improving effect, and a laminate using the same. It is intended to provide a 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.
Assuming that the intermediate reference plane is laid out with unit areas of the same size consisting of virtual rectangles, the unit areas are classified into two types, a first reference area and a second reference area,
In each column and each row formed by the unit areas arranged on the intermediate reference plane, the first reference area consisting of one unit area and the second reference area consisting of one unit area are alternately arranged. Placed in
A first region projecting from the first reference region defined on the intermediate reference surface toward the first reference surface; and a second reference surface defined from the second reference region defined on the intermediate reference surface. A second region projecting toward the
The first region includes a first top surface obtained by projecting the first reference region on the first reference surface with the same magnification or reduction, an outline of the first top surface, and an outline of the first reference region. The first side to be connected,
The second region includes a second top surface obtained by projecting the second reference region on the second reference surface with the same magnification or reduction, an outline of the second top surface, and an outline of the second reference region. The present invention lies in a plate material having a concavo-convex portion characterized by comprising a second side surface to be connected (Claim 1).

  A second 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 of the first invention. (Claim 10).

  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: The said inner panel consists of a board | plate material which has the uneven | corrugated | grooved part of said 1st invention, It is characterized by the above-mentioned. (Claim 11).

The board | plate material which has the said uneven | corrugated | grooved part in 1st invention has the uneven | corrugated | grooved part of the said special shape. As described above, the concavo-convex portion includes the first region protruding toward the first reference surface from the first reference region defined on the intermediate reference surface, and the predetermined region defined on the intermediate reference surface. The second region protruding from the second reference region toward the second reference surface 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 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 second reference region.
The first top surface and the second top surface are configured by planes formed by the first reference surface and the second reference surface, respectively, or are not mere planes, but the first reference surface and the second top surface. It can be comprised by the site | part which protruded in the reverse direction from the said intermediate | middle reference plane from the reference plane. Examples of the shape of the protruding portion include a dome shape and a cone shape, but are not limited thereto.

Since it has such a structure, the plate material of the present invention is excellent in bending rigidity and surface rigidity, and is a plate material 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 arranged such that 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.

  The areas formed by the first reference region and the second reference region are substantially the same. Therefore, the areas of the first region and the second region protruding from the front and back of the plate material are also substantially the same. Therefore, the rigidity can be improved more effectively. In addition, with the improvement in rigidity, it is possible to obtain the effect of improving the vibration damping property and the sound insulation property.

  As described above, according to the present invention, it is possible to obtain a plate material having a pattern of uneven portions that has a high effect of improving rigidity and excellent impact energy absorption characteristics.

  In the second invention, by using the plate member having the uneven portion having excellent rigidity as part of the laminated structure as described above, it is possible to easily obtain a laminated structure having high rigidity and excellent impact energy absorption characteristics. it can. In addition, it is possible to obtain the effect of improving the vibration damping and sound insulation accompanying the improvement of rigidity and the effect of improving the sound absorption by enclosing the air layer.

  In the third aspect of the invention, by using the plate member having the uneven portion with high rigidity as the inner panel as described above, a vehicle panel having extremely high rigidity and excellent energy absorption characteristics can be easily obtained. In addition, it is possible to obtain the effect of improving the vibration damping and sound insulation accompanying the improvement of rigidity and the effect of improving the sound absorption by enclosing the air layer.

(A) The partial top view of the board | plate material which has an uneven | corrugated | grooved part in Example 1, (b) The elements on larger scale of the AA arrow cross section. FIG. 3 is a partial perspective view of a plate member having an uneven portion according to the first embodiment. FIG. 3 is an explanatory diagram showing the arrangement of first regions and second regions on the intermediate reference plane in the first embodiment. Explanatory drawing which shows the intermediate | middle reference plane of the board | plate material which has the uneven | corrugated | grooved part which combined the unit area which consists of a square in Example 2, and the unit area from which a magnitude | size differs. Explanatory drawing which shows the intermediate | middle reference plane of the board | plate material which has the uneven | corrugated | grooved part which arranged the unit area | region which consists of a rectangle in Example 2 continuously in the same posture up and down and right and left. The unit regions formed of trapezoids of the same shape in Example 2 are arranged in such a way that symmetrical shapes are continuously arranged in the left-right direction and the sum of the inner angles of adjacent trapezoids is 180 ° in the up-down direction. Explanatory drawing which shows the intermediate | middle reference plane of the board | plate material which has. Explanatory drawing which shows the cylindrical material which has an uneven | corrugated | grooved part in Example 3. FIG. Explanatory drawing of the laminated structure in Example 4. FIG. Explanatory drawing of the vehicle panel in Example 5. FIG.

In the present invention, the representation of a shape such as a quadrangle is not limited to a narrowly defined concept in terms of geometry, and generally includes a shape that can be recognized as the above shape, and each side is slightly curved, Of course, it is also permissible to provide a curved surface called a fillet R in which roundness and the like necessary for molding are formed at corners and surfaces.
Further, in the present invention, the expression of parallel surfaces is not limited to a geometrically narrow concept, and includes what can be generally recognized as parallel surfaces. For example, in two surfaces, the distance between an arbitrary point on one surface and a point where a normal line at that point and the other surface intersect with each other is substantially the same in any part. Two planes are assumed to be parallel.

  Further, in the present invention, the first top surface and the second top surface are each constituted by a plane formed by the first reference surface and the second reference surface, or are not a mere plane but the first reference surface. And it can comprise by the site | part which protruded in the direction opposite to the said intermediate | middle reference plane from the said 2nd reference plane. Examples of the shape of the protruding portion include a dome shape and a cone shape, but are not limited thereto.

Further, in the plate member having an uneven portion according to claim 1, the unit region is preferably made of a square (claim 2).
In this case, it is possible to obtain a plate material having an excellent uneven portion with little rigidity anisotropy.

Further, in the plate material having the concavo-convex portion, the unit region may have a plurality of sizes (claim 3).
In this case, it is possible to apply uneven shape of various sizes according to the use, and to improve the design.

In the plate member having the uneven 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 60 °. (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 60 °, excellent rigidity improvement rate while ensuring moldability The uneven | corrugated | grooved part shape which has can be obtained.

Above when the inclination angle theta ₂ of the first side surface inclination angle theta ₁ and the second side of less than 10 °, it is difficult to increase the protrusion height of the first region and the second region, the stiffness Improvement rate decreases. Further, the inclination angle theta ₂ of the inclination angle theta ₁ and the second side of the first side is more than 60 ° is difficult on the uneven portion forming a not necessary region.
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.

Further, in the plate member having the concavo-convex portion, at least a part of the first reference surface, the intermediate reference surface, and the second reference surface that are sequentially arranged can be parallel curved surfaces.
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.

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 susceptible to molding restrictions than metal materials, and the degree of freedom in design is greater.

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 in terms of use.

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

Further, in the plate material having the concavo-convex portion, a ratio H1 / t between the protruding height H1 (mm) of the first region and the plate thickness t (mm), and the first side surface and the intermediate reference surface are formed. The largest inclination angle θ ₁ has a relationship of 1 ≦ (H1 / t) ≦ −4θ ₁ +242. The ratio H2 / t between the protrusion height H2 of the second region and the plate thickness t is It is preferable that the largest inclination angle θ ₂ formed by the two side surfaces and the intermediate reference surface has a relationship of 1 ≦ (H2 / t) ≦ −4θ ₂ +242 (Claim 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 sufficiently obtained. On the other hand, when the ratio H1 / t exceeds −4θ ₁ +242, 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 first region cannot be sufficiently obtained. On the other hand, when the ratio H2 / t exceeds −4θ ₂ +242, 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.

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. 1-3.
FIG. 1 shows a plan view of a part of the uneven portion 20. In the same figure, the outlines of the first area 21 and the second area 22 on the intermediate reference plane K3, which do not appear as outlines, are indicated by broken lines (the same applies to FIGS. 2 and 8 described later).
3 shows the shape of the concavo-convex portion 20 of the plate 1 by the arrangement of the first reference region 213 and the second reference region 223 on the intermediate reference plane K3 (the same applies to FIGS. 4 to 6 described later). is there).

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. 1B, the concavo-convex portion 20 includes three virtual surfaces, a first reference surface K1, an intermediate reference surface K3, and a second reference surface K2, which are sequentially arranged in parallel at intervals. The reference plane is used as a reference. It is assumed that the intermediate reference plane K3 is formed by laying unit areas 23 of the same size made up of virtual rectangles, and each unit area 23 is classified into two types, a first reference area 213 and a second reference area 223.

  In each column and each row formed by the unit regions 23 arranged on the intermediate reference plane K3, a first reference region 213 composed of one unit region 23 and a second reference region 223 composed of one unit region 23 are alternately arranged. To place. Then, a first region 21 projecting from the first reference region 213 defined on the intermediate reference surface K3 toward the first reference surface K1, and a second reference region 223 defined on the intermediate reference surface K3 from the second reference region 223. A second region 22 protruding toward the surface K2 is formed.

  The first region 21 includes a first top surface 211 obtained by projecting the first reference region 213 on the first reference surface K1 with the same magnification or reduction, the contour of the first top surface 211, and the contour of the first reference region 213. Similarly, the second region 22 includes a second top surface 221 obtained by projecting the second reference region 223 on the second reference surface K2 with the same magnification or reduction, and a second top surface 221. The second surface 222 is configured to connect the contour of the surface 221 and the contour of the second reference region 223.

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 as shown in FIG. 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.
Moreover, in this example, the 1st area | region 21 and the 2nd area | region 22 have the same shape and dimension, and only a protrusion direction differs. The protrusion height H1 of the first region 21 and the protrusion height H2 of the second region 22 are both 1.0 mm.

  In addition, the plate 1 having the concavo-convex portion 20 of the present example is formed by press molding using a pair of molds, and the base plate before molding is made of a 1000 series aluminum plate having a thickness t = 0.3 mm. 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, as shown in FIG. 1B, 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 both 45 °, The side surface 212 and the second side surface 222 are formed continuously in one plane without having a bent portion.
As shown in FIG. 3, in this example, the virtual unit area 23 forming the intermediate reference plane K3 is a square, and the length D of the diagonal is D = 14.14 mm.
Further, the ratio D / t between the length D (mm) of the diagonal line of the square forming the unit shape 23 and the plate thickness t (mm) is 47.13.

The ratio H1 / t between the protrusion height H1 (mm) of the first region 21 and the plate thickness t (mm) is 3.33. Further, the inclination angle θ ₁ = 45 ° formed by the first side surface 212 and the intermediate reference surface K3 is −4θ ₁ + 242 = 62. Therefore, the relationship of 1 ≦ H1 / t ≦ 62 is satisfied. Similarly, the ratio H2 / t between the protruding height H2 (mm) of the second region 22 and the plate thickness t (mm) is 3.33. Further, the inclination angle θ ₂ = 45 ° formed by the second side surface 222 and the intermediate reference surface K3 is −4θ ₂ + 242 = 62. Therefore, the relationship of 1 ≦ H2 / t ≦ 62 is satisfied.

Since it has such a structure, the board | plate material 1 which has the uneven | corrugated | grooved part 20 of this example becomes a board | plate material excellent in the energy absorption characteristic while being excellent in bending rigidity.
The reason why the rigidity is improved is considered as follows. That is, the first region 21 and the second region 22 are the first top surface 211 and the second top surface 221 that are arranged at positions separated in the thickness direction of the plate material 1 and the first region that intersects the thickness direction of the plate material 1. It consists of the side surface 212 and the second side surface 222, and many materials can be arranged at a position away from the neutral surface. Therefore, many materials can be effectively used as the strength member, and the rigidity improvement effect can be enhanced.
In addition, with the improvement in rigidity, it is possible to obtain the effect of improving the vibration damping property and the sound insulation property.

  In order to quantitatively determine the effect of improving the rigidity of the plate 1 of Example 1, a bending rigidity evaluation using a cantilever beam using FEM analysis was performed.

(FEM analysis)
<Evaluation of bending stiffness by cantilever>
In the FEM analysis of the cantilever, as shown in FIG. 1, one end Z1 of the test piece consisting only of the concavo-convex portion 20 was fixed, the other end Z2 was the free end, and a load of 1 N was applied to the central portion of the free end. Find the amount of deflection at the time.
The shape of the test piece has a rectangular shape of 100 mm × 100 mm consisting only of the uneven portion 20 shown in this example. Further, the plate thickness t after plate forming was set to 0.261 mm from the increase ratio of the surface area.
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.

The test piece is provided with a side in a direction parallel to one side of the unit region 23.
It was found that the plate material 1 having the concavo-convex portion 20 of Example 1 has a bending rigidity improved by 2.65 times compared to the flat base plate.

(Example 2)
This example is a modification of the plate 1 having the concavo-convex portion 20 of Example 1, as shown in FIGS. In this example, the concavo-convex portion 20 that protrudes from the first reference region 213 and the second reference region 223 shown in FIGS. 4 to 6 with respect to the first reference surface K1 and the second reference surface K2 is formed.
4 is an example in which a unit region 23 made of a square and a unit region 233 having a size twice that of the unit region 23 are arranged in combination.
The plate 1 made of an intermediate reference plane shown in FIG. 5 is an example in which rectangular unit regions 23 are continuously arranged in the same posture in the vertical and horizontal directions.
The plate 1 shown in FIG. 6 has unit regions made up of trapezoids having the same shape, in which the shapes symmetrical to the sides are continuously arranged in the left-right direction, and the sum of the inner angles of adjacent trapezoids is 180 ° in the up-down direction. This is an example.
Other configurations are the same as those of the first embodiment.

In this example, the uneven | corrugated | grooved part shape which has various magnitude | sizes and square shape according to a use can be applied, and design property can be improved.
In addition, the same effects as those of the first embodiment are obtained.

(Example 3)
In this example, as shown in FIG. 7, the concavo-convex portion 20 is provided in 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 unit shape of the concavo-convex portion 20 is obtained by projecting the unit shape 23 shown in the first embodiment along the curved surface formed by the intermediate reference plane K3 onto the intermediate reference plane K3. 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.

Example 4
In this example, as shown in FIG. 8, 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 the case of the plate 1 alone having the uneven portion 20 is obtained. In addition, it is possible to obtain the effect of improving the vibration damping and sound insulation accompanying the improvement of rigidity and the effect of improving the sound absorption by enclosing the air layer.
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, as the face plate, a metal plate other than an aluminum alloy, for example, a steel plate, a titanium plate, a resin plate, or the like can be applied.

(Example 5)
In this example, as shown in FIG. 9, the plate material 1 described in Example 1 and Example 2 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 and sound insulation accompanying the improvement of rigidity and the effect of improving the sound absorption by enclosing the air layer.

DESCRIPTION OF SYMBOLS 1 Board | plate material which has an uneven | corrugated | grooved part 20 Uneven | corrugated | grooved part 21 1st area | region 211 1st top surface 212 1st side surface 213 1st reference | standard area 22 2nd area | region 221 2nd top surface 222 2nd side surface 223 2nd reference | standard area | region 23 Unit area 5 Stacking Structure 6 Vehicle panel K1 First reference plane K2 Second reference plane K3 Intermediate reference plane

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.
Assuming that the intermediate reference plane is laid out with unit areas of the same size consisting of virtual rectangles, the unit areas are classified into two types, a first reference area and a second reference area,
In each column and each row formed by the unit areas arranged on the intermediate reference plane, the first reference area consisting of one unit area and the second reference area consisting of one unit area are alternately arranged. Placed in
A first region projecting from the first reference region defined on the intermediate reference surface toward the first reference surface; and a second reference surface defined from the second reference region defined on the intermediate reference surface. A second region projecting toward the
The first region includes a first top surface obtained by projecting the first reference region on the first reference surface with the same magnification or reduction, an outline of the first top surface, and an outline of the first reference region. The first side to be connected,
The second region includes a second top surface obtained by projecting the second reference region on the second reference surface with the same magnification or reduction, an outline of the second top surface, and an outline of the second reference region. The board | plate material which has an uneven | corrugated | grooved part characterized by consisting of a 2nd side surface to connect.   2. The plate having an uneven portion according to claim 1, wherein the unit region is a square.   3. The plate having an uneven portion according to claim 1 or 2, wherein the unit region has a plurality of sizes. In plate having a concavo-convex portion according to claim 1, and the intermediate reference for the first side face against surface inclination angle theta ₁ and the inclination angle theta ₂ of the second side surface with respect to the intermediate reference plane, The board | plate material which has an uneven | corrugated | grooved part characterized by being in the range of 10 degrees-60 degrees.   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 plate material having uneven portions according to claim 6, wherein a plate thickness t before forming the metal plate is 0.05 to 6.0 mm.   In the board | plate material which has an uneven | corrugated | grooved part of Claim 6 or 7, ratio D / t of length D (mm) of the diagonal of the square which makes the said unit shape, and the said board thickness t (mm) is 10-2000. A plate material having an uneven portion characterized by being. In the board | plate material which has an uneven | corrugated | grooved part 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), the said 1st side surface, and the said intermediate | middle The largest inclination angle θ ₁ formed by the reference plane has a relationship of 1 ≦ (H1 / t) ≦ −4θ ₁ +242, and the ratio H2 / projection height H2 of the second region to the plate thickness t t and the largest inclination angle θ ₂ formed by the second side surface and the intermediate reference surface have a relation of 1 ≦ (H2 / t) ≦ −4θ ₂ +242 .   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. .   Both panels which have 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 1-9. Vehicle panel.

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