JP3742569B2 - Metal panel manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a metal panel formed of a metal flat plate, particularly a decorative steel plate, and used for a wall panel or the like.
[0002]
[Prior art]
Conventionally, some metal panels used as wall panels are formed by bending a side portion of a metal flat plate into a box shape with a shallow bottom with one side opened.
[0003]
In this method, the sides of a flat plate having a substantially rectangular shape in plan view are bent by a bender machine to stand. The bender machine clamps the upper and lower surfaces of the flat plate with upper and lower molds so that only the bending margin protrudes in a cantilevered manner on one side of the flat plate, and turns the bending allowance protruding in a cantilevered shape into a mold for lifting. And bent from the protruding base. In this way, the metal panel is formed in a substantially box shape by bending each side of the flat plate. In forming the metal panel, notches may be formed in advance so that the bent portions overlap each other when the side portions adjacent to both sides of the flat plate corner portions are not overlapped with each other. .
[0004]
However, since such a metal panel is formed by bending each side part and standing up and abutting the side edges of the adjacent standing pieces to form a substantially box shape, the adjacent standing pieces are not continuous. A gap is generated, and rust and the like are easily generated on the side edge, so that the side edge of the standing piece on which rust and the like are generated is visible and looks unpleasant and unsightly.
[0005]
Therefore, in order to solve such a problem, it is conceivable to form a metal panel in which adjacent upstanding pieces are formed by pressing a flat plate. In this case, a set of press processing is performed using a press die. The size and shape of the metal panel that can be manufactured with this press die is one type, and it was impossible to quickly and inexpensively manufacture metal panels of various sizes.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and the object of the present invention is to be able to quickly and inexpensively respond to various dimensions, and the adjacent upright pieces are continuously rusted. It is an object of the present invention to provide a method for manufacturing a metal panel in which the side edge is not exposed and does not look bad.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, a metal panel manufacturing method according to the present invention includes a bending machine 4a or the like on side portions 3 adjacent to both sides of a corner portion 2 of a metal flat plate 1 having a substantially rectangular shape in plan view. Virtual fold lines 9 that are to be bent at the portion 4 are formed up to the vicinity of the corner portion 2, respectively, and the outer edge of the corner portion 2 and the side portions 3 on both sides of the virtual fold line 9 is substantially L-shaped in plan view. A side notch 81b is formed along the imaginary fold line 9 to bend the side portions 3 at the bent portion 4 to form the side upright pieces 5, and at the same time, the corner 2 having the notches 81b is left unbent. 21 is formed, and then the unbent portion 21 is drawn by a drawing portion 6 made of a roller 61 or the like to form the corner upright pieces 7 continuous with the side upright pieces 5 on both sides. . By adopting such a configuration, it is possible to respond quickly and inexpensively to various dimensions, but the side edge is exposed due to the adjacent side upright pieces 5 being continuous, and the appearance is poor. It is possible to manufacture a metal panel that does not occur, and at this time, it is possible to prevent the large bending remaining portion 21 from being formed and making the drawing portion 6 difficult to draw.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0012]
The metal panel manufactured by the method for manufacturing a metal panel according to the present embodiment is formed by forming a decorative steel plate into a flat plate having a substantially rectangular shape in plan view and bending the side portion of the flat plate into a generally box shape as shown in FIG. This is used as a wall panel P to be shown and will be briefly described below.
[0013]
The metal panel cuts the decorative steel plate into a flat plate 1 having a substantially rectangular shape in plan view, and forms a notch 81b having a substantially L shape in plan view at the outer edge of the corner portion 2 of the flat plate 1 (FIG. 2B). reference). And the side part 3 adjacent to the both sides of the corner part 2 in which the notch 81b is formed is bent by the bending part 4, respectively, to form the side upright pieces 5 that stand substantially perpendicular to the flat plate 1 (FIG. 2 ( b) Right, see (c) (d)). After that, the corner portion 2 between the adjacent side standing pieces 5 becomes a left bending portion 21 that is not bent when each side rising piece 5 is raised, and the left bending portion 21 is narrowed down. A corner upright piece 7 is formed by drawing at the processing portion 6 and continuing to the side upright pieces 5 on both sides (see FIG. 2 (e)). By doing in this way, it becomes possible to form the metal panel which the adjacent side part standing piece 5 continues, without performing press work, and it demonstrates in more detail below.
[0014]
A metal panel first coats a surface of a steel plate with a synthetic resin to form a decorative steel plate, and the decorative steel plate is formed on a flat plate 1 having a substantially rectangular shape in plan view. Then, the notches 81b having a substantially L shape in plan view are formed in the corner portions 2 on both sides of one short side portion 31 of the flat plate 1 having a substantially rectangular shape in plan view, and the other short side portion 31 is formed. A cutout portion 82 having a substantially rectangular shape in plan view is formed in the corner portions 2 on both sides of the plate. In addition, in the corner part 2 in which this notch part 82 is formed, although it mentions later, the corner standing piece 7 is not formed in the drawing part 6 in this invention.
[0015]
The flat plate 1 having a substantially rectangular shape in plan view is formed by bending each side portion 3 with a bending portion 4. In the present embodiment, a bending machine 4a as shown in FIG. The bending machine 4a clamps the upper and lower surfaces of the flat plate 1 with upper and lower molds 41 and 42 so that only the bending allowance protrudes in a cantilever shape at the side 3 of the flat plate 1, and the bending allowance protruding in a cantilever shape. It is bent from the protruding base by a mold 43 for lifting up. The bender machine 4a is configured to bend the flat plate 1 having a substantially rectangular shape in plan view by one side 3, and the short side portion 31 on the traveling direction side of the flat plate 1 conveyed with the longitudinal direction as the traveling direction is first folded. . The short side portion 31 on the traveling direction side is formed with a notch 81b having a substantially L shape in plan view at the corner portions 2 on both sides thereof. This prevents the portion 6 from becoming difficult to be drawn. The bender machine 4a can freely adjust the length in the bending direction. As shown in FIG. 3, the upper die 41 and the lifting die 43 are formed of a plurality of units in the longitudinal direction, and the plurality of units are continuously arranged according to the bending length of the flat plate 1. It becomes possible to cope with various lengths by changing.
[0016]
In bending with the bender machine 4 a, first, a virtual fold line 9 is set at a portion to be bent, and the upper and lower surfaces just inside the virtual fold line 9 are clamped by the upper and lower dies 41 and 42 along the virtual fold line 9. However, the virtual fold line 9 in the short side portion 31 is formed inside the substantially L-shaped notch 81 of the flat plate 1. Then, with the short side portion 31 protruding in a cantilever form from the upper and lower dies 41 and 42 as a bending allowance, the side upright piece 5 is formed by lifting it up from below with a lifting die 43. In this way, the flat plate 1 formed by bending the short side portion 31 on the traveling direction side to form the side upright pieces 5 is transported first as it is, and then the short side portion 31 on the rear side in the traveling direction is folded. . The short side portion 31 on the rear side in the traveling direction is formed with a notch 82 having a substantially rectangular shape in plan view at the corners 2 on both sides thereof. The line 9 is formed along the edge of the rectangular cut-out portion 82, and when the side portions 3 on both sides of the corner portion 2 where the cut-out portion 82 is formed are bent, the side portions stand up. The pieces 5 are overlapped so as not to interfere with each other.
[0017]
The flat plate 1 formed by bending the short side portions 31 in the front and rear directions in the traveling direction to form the side upright pieces 5 is rotated 90 ° in a plan view so that the long side portions 32 are positioned in the front and rear directions in the traveling direction. Then, in the same manner as in the case of the short side portion 31, the side upright pieces 5 are formed also on the long side portion 32 by the bender machine 4a.
[0018]
In this way, when the side upright pieces 5 are formed on the same side of the flat plate 1 on the respective side portions 3 of the flat plate 1 having a substantially rectangular shape in plan view, a notch 81b having a substantially L shape in plan view is formed. In the corner portion 2, since the notches 81 b are formed outside the virtual fold line 9 of the corner portion 2 and the side portions 3 on both sides thereof, the side portions 3 on both sides of the corner portion 2 are formed by bending. An unbent portion 21 is formed between the raised side pieces 5. In the present invention, the left bending portion 21 is drawn by the drawing portion 6 to form the corner upright pieces 7, and the adjacent side upright pieces 5 are continued through the corner upright pieces 7. is there.
[0019]
The drawing is performed by forming the side upright pieces 5 on both long sides 32 of the flat plate 1, and then transporting the flat plate 1 further and performing it at the drawing unit 6.
[0020]
As shown in FIGS. 4 and 5, the drawing unit 6 is mainly composed of a base 62, a roller 61, and a pressing member 63.
[0021]
The base 62 has a rectangular parallelepiped shape, and a horizontal rectangular surface on the upper surface is used as a mounting surface on which the surface of the flat plate 1 on which the side upright pieces 5 are not formed is mounted. And the 1 corner part 2 of the rectangular-shaped upper surface is the roll part 64 mentioned later by which drawing processing is performed with the roller 61. FIG.
[0022]
The roller 61 has a generally drum shape in which a rounded portion 61a is formed by narrowing so that the diameter becomes smaller toward the center near the upper and lower central portions of the cylinder. The bend portion 61 a of the roller 61 is bent 90 ° in a substantially letter shape when viewed from the side, and the bend portion 61 a is disposed in a state of falling down along the corner portion 2 that is the roll portion 64 of the base 62. Is done. In addition, R1 is formed in the bent part of the bent part 61a, and as will be described later, a predetermined R is formed on the corner upright piece 7 by R1 of the bent part 61a and R2 formed on the pressing member 63. It becomes possible to do. The roller 61 is rotatably supported around a drum-shaped central axis i, and the central axis is movable up and down. Thereby, the roller 61 can roll up and down on the roll part 64 of the base 62. Then, the side upright pieces 5 on both sides of the unbent portion 21 of the flat plate 1 placed on the upper surface of the base 62 are pressed so as to be continuous with the side surfaces 64 a on both sides of the roll portion 64 that is one corner portion 2 of the base 62. The members 63 are arranged.
[0023]
The pressing member 63 has a substantially pentagonal prism shape, and the bottom surface of the pressing member 63 is placed on the upper surface of the flat plate 1 placed on the upper surface of the base 62. Further, two adjacent side surfaces perpendicular to the bottom surface of the pressing member 63 are formed so as to be orthogonal to each other in a plan view, and the two side surfaces are pressed to hold the side upright pieces 5 on both sides of the unbent portion 21 of the flat plate 1 from the inner surface side. As surface 63a. In the present embodiment, the upper half of the pressing surface 63a is cut out to form the stepped portion D. This is because when the pressing surface 63a is pressed against the inner surface of the side rising piece 5, the side rising piece 5 This is for escaping this when the tip is bent inward. The pressing member 63 is movable on the upper surface of the base 62 and is controlled so that the flat plate 1 can be clamped between the upper surface of the base 62.
[0024]
The drawing process performed by the drawing unit 6 will be described.
[0025]
The flat plate 1 in which the side upright pieces 5 are formed on the respective side portions 3 is transported from the bender machine 4 a and placed on the base 62 of the drawing unit 6. Then, both sides of the roll portion 64 of the base 62 are moved by moving the pressing member 63 while the pressing surfaces 63a of the pressing member 63 are in contact with the side standing pieces 5 on both sides of the unbent bending portion 21 to be drawn. The side surfaces 64a and the side upright pieces 5 on both sides are arranged so as to be substantially flush with each other. At this time, the unbent portion 21 is positioned on the roller 61 outside the roll portion 64 of the base 62 in plan view, and the flat plate 1 is clamped by the base 62 and the pressing member 63 in this state.
[0026]
Next, the roller 61 arranged on the roll part 64 of the base 62 is rolled upward across the roll part 64 of the base 62 and the side upright piece 5 that is substantially flush with the roll part 64 (see FIG. 5 (a) (b)). In this way, it is possible to form the corner upright piece 7 by drawing the remaining bending portion 21 (see FIGS. 5C and 5D), and thereby the adjacent side upright pieces 5 are raised in the corner. It can be continued through the piece 7.
[0027]
According to the above configuration, the side standing pieces 5 are formed on the side portions 3 adjacent to both sides of the corner portion 2 of the flat plate 1 by the bending portions 4 such as the bender machine 4a, respectively, and the side standing pieces are formed. 5 is formed at the corner portion 2 between 5 and the corner standing piece 7 which is continuous with the side standing pieces 5 on both sides is formed by the drawing portion 6 including the roller 61 and the like. Thus, the side portion 3 of the flat plate 1 having various dimensions can be bent by the bending portion 4 of the bender machine 4a or the like to form the side upright pieces 5, and thereafter, continuous between the side upright pieces 5 The corner upright piece 7 to be formed can be formed and can correspond to the flat plate 1 having various dimensions, but the side upright pieces 5 adjacent to each other are continuously exposed at a low cost. A metal panel that doesn't look bad It can be produced.
[0030]
【The invention's effect】
As described above, in the first aspect of the present invention, the portion of the metal plate having a substantially rectangular shape in plan view is bent at a side portion adjacent to both sides of the corner portion by a bending portion such as a bender machine. Are formed in the vicinity of the corner portion, and a substantially L-shaped notch in a plan view is formed on the outer outer edge of the corner portion and on the outer sides of the virtual bending lines on both sides thereof. Each side part is bent at the bending part along the line to form a side upright piece, and at the same time, a left bending part is formed in the corner part having the notch, and then the remaining bending part is a drawing part made of a roller or the like. Since the corner upright pieces that are drawn and formed on the side upright pieces on both sides are formed, it is possible to respond quickly and inexpensively to various dimensions, but the adjacent side upright pieces are continuous. Side edge is Put out it becomes possible appearance producing metal panels without such bad this time, it is possible to prevent a large bending remains portion is formed to become difficult to be drawn at drawing unit.
[Brief description of the drawings]
FIG. 1 shows a process of manufacturing a metal panel from a flat plate in one embodiment of the present invention, wherein (a), (b) and (c) are plan views, and (d) and (e) are perspective views.
2A to 2E are explanatory views of a manufacturing process in which a metal panel is manufactured from a flat plate in the same as above.
3A and 3B are explanatory diagrams of bending work in the above-described bender machine, wherein FIG. 3A is a perspective view, FIG. 3B is a plan view, and FIG. 3C is an exploded perspective view.
4A and 4B are explanatory views of the drawing portion according to the first embodiment, wherein FIG. 4A is a plan view and FIG. 4B is a side view.
FIGS. 5A and 5B are explanatory views of drawing processing in the drawing processing portion, wherein FIGS. 5A and 5B show a state before the bending remaining portion is drawn by a roller, and FIGS. 5C and 3D show bending remaining portions, respectively. A state where a corner upright piece is formed by squeezing with a roller is shown.
FIG. 6 is a perspective view of a wall panel in which a metal panel formed according to the present invention is used.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flat plate 2 Corner part 3 Side part 4 Bending part 4a Bender machine 5 Side part standing piece 6 Drawing part 61 Roller 7 Corner standing part

Claims (1)

In addition to forming a virtual fold line to be bent by a bending section such as a bender machine on the sides adjacent to both sides of the corner of a metal flat plate having a substantially rectangular shape in plan view, each corner Further, a substantially L-shaped notch in plan view is formed on the outer edge of the outer side of the imaginary fold line on both sides thereof, and each side part is bent at the bent portion along the imaginary fold line to stand up the side. At the same time as forming a piece, a bend remaining portion is formed in the corner portion having the notch, and then the left bend portion is drawn by a drawing portion made of a roller or the like to form a corner standing piece continuous with the side standing pieces on both sides. A method for manufacturing a metal panel.

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