EP1523387A1 - Metal plate, method for making same and method for folding same - Google Patents

Metal plate, method for making same and method for folding same

Info

Publication number
EP1523387A1
EP1523387A1 EP03755618A EP03755618A EP1523387A1 EP 1523387 A1 EP1523387 A1 EP 1523387A1 EP 03755618 A EP03755618 A EP 03755618A EP 03755618 A EP03755618 A EP 03755618A EP 1523387 A1 EP1523387 A1 EP 1523387A1
Authority
EP
European Patent Office
Prior art keywords
plate
grooves
bundle
face
metal plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03755618A
Other languages
German (de)
French (fr)
Inventor
Alfred Chocroun
Jean-Claude Jeandeaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ArcelorMittal Distribution Services France SAS
Original Assignee
Arcelor Steel Service Center France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcelor Steel Service Center France SAS filed Critical Arcelor Steel Service Center France SAS
Publication of EP1523387A1 publication Critical patent/EP1523387A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/08—Bending by altering the thickness of part of the cross-section of the work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12354—Nonplanar, uniform-thickness material having symmetrical channel shape or reverse fold [e.g., making acute angle, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal

Definitions

  • the present invention relates to a metal plate, as well as a method of manufacturing and a method of folding such a metal plate.
  • the bending of the metal plate is carried out in the factory and controlled by qualified personnel, since, at present, it requires the use of a heavy machine, such as a roll forming machine or a press, which constitutes a disadvantage.
  • French Patent 2,776,547 teaches to make a line of successive perforations in a plate, then to fold this plate along the line of perforations.
  • the presence of perforations in the object produced from the metal plate weakens this object and proves to be unacceptable in most applications.
  • a metal plate which is intended to be folded according to a bundle of rectilinear and parallel grooves, produced by pressing. These grooves each have a flat bottom, so that they cannot be produced by pressing without the metal of the plate being locally crushed, that is to say without there being hardening of this metal.
  • the hardening of the metal more particularly at the base of the grooves, means that, in most cases, the plate breaks when it is folded according to the bundle of grooves, unless it is agreed that the radius of curvature at the fold is very important.
  • JP-60 046819 it is a question of a metal plate, in which is formed a groove of V-shaped cross section. This plate is folded according to the groove. According to tests carried out by the applicants, it does not seem possible that the plate will not break when it is thus folded.
  • the invention which intends to remedy the aforementioned drawback, therefore has at least the aim of facilitating the folding of a metal plate.
  • the invention relates to a metal plate, comprising a peripheral edge, as well as a first and a second opposite face, characterized in that at least one bundle of several grooves obtained by pressing, rectilinear, parallel between they, grouped, connecting two portions of said peripheral edge to each other and each delimited by a wall having the overall shape of a dihedral is formed in said first face of the metal plate.
  • the or each pair of consecutive grooves of said bundle delimits a strip of the plate, this strip being curved on the side of said second face;
  • one of the dihedrons has a first face which is located more towards the inside of the beam than the second face of this dihedron, the angle formed by the first face of the dihedron and a plane generally perpendicular to the plate being smaller than the angle formed by the second face of the dihedral and said plane;
  • Each of the grooves of the bundle contains, an adhesive, at least a portion of the first face of the plate being covered with a sealing film closing laterally, these grooves; - It is folded according to the bundle of grooves, the two faces of each dihedron being glued to each other.
  • the invention also relates to a method of manufacturing a plate as defined above, characterized in that it comprises a step in which:
  • said strip is bulged on the side of the second face of the plate by performing step (a), the first element carrying at least one conformation groove of said strip.
  • the subject of the invention is a method of folding a metal plate, characterized in that the metal plate is as defined above and in that it comprises a step in which: (b) - in the plate, a fold is formed according to the bundle of grooves, such that these grooves and the concavity of the fold are on the same side of the plate.
  • step (b) is carried out manually;
  • step (b) an adhesive is applied inside each of the grooves of the bundle;
  • step (b) includes a manufacturing process as defined above.
  • step (b) includes a manufacturing process as defined above.
  • the invention will be clearly understood on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which: - Figure 1 is a perspective view of a metal plate according to the invention;
  • FIG. 2 is a partial view, in section along the line II-II of Figure 1;
  • - Figure 3 is a perspective view of the metal plate of Figures 1 and 2 after folding;
  • FIG. 4 is a view similar to Figure 2 and illustrates a step in the folding process of the plate shown in this Figure 2;
  • - Figure 5 is a partial view, in section along the line V-V of Figure 3;
  • FIG. 6 and 7 are two views similar to Figure 2 and respectively illustrate two steps of a method, according to the invention, for manufacturing the plate shown in Figures 1 to 5;
  • Figure 8 is a view similar to Figure 2 and shows a metal plate according to an alternative embodiment of the invention.
  • FIGS. 1 and 2 represent a metal plate 1, which is planar and has two opposite faces 2 and 3, as well as a peripheral edge 4.
  • the plate 1 carries two bundles 5 of rectilinear grooves, formed in the face 2.
  • the grooves of the same bundle 5 are three in number and are respectively referenced 6, 7 and 8. They are parallel between they and connect two portions of the peripheral edge 4 to each other.
  • each of these grooves 6, 7 and 8 is delimited by a wall having the overall shape of a dihedral 9, 10 or 11.
  • each central groove 7, which extends between the lateral grooves 6 and 8 of the same beam 5 as it is, is symmetrical with respect to a plane P x perpendicular to the plate 1.
  • one, referenced 12, of the two faces of the dihedral 9 which delimits the lateral groove 6 is closer to the central groove 7 than the other face 13 of this dihedron 9. It extends along a plane P 2 generally perpendicular to the plate 1.
  • the face 13 and this plane P 2 form a non-zero angle ⁇ .
  • the groove 8 of a bundle 5 is symmetrical with the groove 6 of this bundle 5, so that its shape is deduced from the above.
  • the strip 14 which the two consecutive grooves 6 and 7 of each bundle 5 delimit in the plate 4 is convex on the side of the face 3 and concave on the side of the face 2. The same is true of the strip 14 which extends between the two consecutive grooves 7 and 8 of each bundle 5.
  • an adhesive A is applied at the beams 5, taking care to penetrate this adhesive A into the grooves 6, 7 and 8, after which the plate 1 is as illustrated in FIG. 4.
  • the folding of the plate 1 is symbolized by the arrows F represented in FIG. 1. This folding, after which the plate 1 is as illustrated in FIGS.
  • each bundle 5 facilitates the folding of the plate 1.
  • Tests have shown that the beams 5 make the folding of the plate 1 so easy that it can be carried out manually, for example by a private individual assembling a piece of furniture which has been sold to him in spare parts and of which is intended to form part of the plate 1. Consequently, the plate 1 has the advantage of being able to remain flat, therefore of compact size, as long as its transport to the place of its assembly has not been completed.
  • the grooves 6, 7 and 8 are closed, as can be seen in FIG. 5.
  • the two faces of each of the dihedrons 9, 10 and 11 are glued one to the other. other, which stiffens the plate 1 at the folds 16 and opposes the straightening of this plate 1.
  • each fold 16 consists of a succession of elementary folds, each of which is formed along one of these grooves 6, 7 and 8. It follows that the deformation resulting from each folding is distributed between these elementary folds, so that the plate 1 is much more solid at each fold 16 than if each bundle 5 was replaced by a single groove 6, 7 or 8 .
  • each of the dihedrons 9, 10 and 11 form one of several angles ⁇ and ⁇ .
  • the sum of the angles ⁇ and ⁇ which were at a beam 5 before folding determines the angle ⁇ that the two portions of the plate 1 separated by the fold 16 extending along this beam 5 form after folding.
  • the average radius of curvature R of a fold 16 formed according to a beam 5 depends on the depth p of the grooves 6, 7 and 8 of this beam, on the number of these grooves, equal to three in the example shown, and on the angle ⁇ or ⁇ formed by the two faces of the dihedral 9, 10 or 11 delimiting each of these grooves 6, 7 and 8. It also depends on the distance d which, before folding, separates the two lateral grooves 6 and 8 of the bundle 5. Advantageously, it is ensured that the greater this mean radius of curvature R, the greater the number of grooves in the bundle 5.
  • the strips 14 define convex surfaces. If these surfaces were not convex, but for example planar, they would constitute facets after folding. The shape of the convex surfaces which the strips 14 define is therefore determined in such a way that after the folding of the plate 1; these facets are little or not perceptible to the naked eye.
  • a bundle of ribs 19 that carries the punch 18 has a cross section substantially complementary to each bundle 5 of grooves.
  • the die 17 carries two grooves 20 each of which is intended to make a face of a strip 14 convex.
  • the plate 1 blank of any relief, has been positioned between the die 17 and the punch 18, which is moved towards the matrix 17.
  • the punch 18 is stopped as soon as it has reached the position which is illustrated in FIG. 7 and in which this punch 18 and the matrix 17 press between them the plate 1 to print a bundle 5 of three grooves 6 , 7 and 8, as well as each of the bands 14 delimited by these grooves.
  • the punch 18 is moved away from the die 17, after which the plate 1 can be removed.
  • the punch 18 and the die 17 can be replaced by two rollers which press between them the plate 1 and each of which rolls on one of the two faces 2 and 3 of this plate 1.
  • each rib splits the metal of the plate 1 more than it crushes it. This is advantageous insofar as the crushing of a metal is accompanied by a hardening which makes this metal brittle.
  • the plate 1 shown in Figure 8 is identical to that shown in Figure 2, except that the grooves 6, 7 and 8 of each of its bundles 5 contain an adhesive 21 and are closed laterally by a sealing film 22 which covers a strip of the face 2 of the plate 1 and isolates this adhesive 21 from atmospheric air. Just before folding this plate 1, the sealing films 22 are removed, after which the plate 1 is as illustrated in FIG. 4.
  • each of the lateral grooves 6 and 8 can be substantially symmetrical with respect to the plane P 2 generally perpendicular to the plate 1.
  • the grooves 6, 7 and 8 of each bundle 5 can be generally identical.

Abstract

The invention concerns a metal plate (1) comprising a peripheral edge (4), and opposite first (2) and second (3) surfaces. At least one sheaf (5) of several assembled rectilinear mutually parallel grooves (6, 7, 8) obtained by pressing, linking together two portions of said peripheral edge (4) and delimited each by a wall with globally dihedral shape is provided in said first surface (2) of the metal plate (1). Said metal plate is designed to be folded along the sheaf (5) of grooves.

Description

PLAQUE METALLIQUE, SON PROCEDE DE FABRICATION ET SON PROCEDE DE PLIAGE METAL PLATE, MANUFACTURING METHOD THEREOF, AND FOLDING METHOD
La présente invention concerne une plaque métallique, ainsi qu'un procédé de fabrication et un procédé de pliage d'une telle plaque métallique.The present invention relates to a metal plate, as well as a method of manufacturing and a method of folding such a metal plate.
Il est connu de fabriquer par exemple un coffret pour matériel électrique ou un carter de protection ou bien encore un élément d'ameublement, en pliant une ou plusieurs fois une plaque métallique initialement plane.It is known to manufacture, for example, a box for electrical equipment or a protective casing or even a furnishing element, by folding one or more times an initially flat metal plate.
Le pliage de la plaque métallique est effectué en usine et piloté par du personnel qualifié, puisque, à l'heure actuelle, il requiert l'emploi d'une machine lourde, telle qu'une profileuse à galets ou une presse, ce qui constitue un inconvénient.The bending of the metal plate is carried out in the factory and controlled by qualified personnel, since, at present, it requires the use of a heavy machine, such as a roll forming machine or a press, which constitutes a disadvantage.
Le brevet français 2 776 547 enseigne de réaliser une ligne de perforations successives dans une plaque, puis de plier cette plaque selon la ligne de perforations. Toutefois, la présence de perforations dans l'objet réalisé à partir de la plaque métallique fragilise cet objet et s'avère rédhibitoire dans la plupart des applications.French Patent 2,776,547 teaches to make a line of successive perforations in a plate, then to fold this plate along the line of perforations. However, the presence of perforations in the object produced from the metal plate weakens this object and proves to be unacceptable in most applications.
Dans la demande de brevet anglais GB-2 197 810, il est décrit une plaque métallique qui est destinée à être pliée selon un faisceau de gorges rectilignes et parallèles, réalisées par pressage. Ces gorges comportent chacune un fond plat, de sorte qu'elles ne peuvent pas être réalisées par pressage sans que le métal de la plaque soit localement écrasé, c'est-à-dire sans qu'il y ait écrouissage de ce métal. L' écrouissage du métal plus particulièrement à la base des gorges fait que, dans la plupart des cas, la plaque se casse lorsqu'elle est pliée selon le faisceau de gorges, sauf à consentir que le rayon de courbure au niveau du pli soit très important . Dans la demande de brevet japonais JP-60 046819, il est question d'une plaque métallique, dans laquelle est ménagée une gorge de section transversale en forme de V. Cette plaque est pliée selon la gorge. D'après des essais effectués par les demandeurs, il ne paraît pas possible que la plaque ne casse pas lorsqu'elle est ainsi pliée.In the British patent application GB-2 197 810, a metal plate is described which is intended to be folded according to a bundle of rectilinear and parallel grooves, produced by pressing. These grooves each have a flat bottom, so that they cannot be produced by pressing without the metal of the plate being locally crushed, that is to say without there being hardening of this metal. The hardening of the metal, more particularly at the base of the grooves, means that, in most cases, the plate breaks when it is folded according to the bundle of grooves, unless it is agreed that the radius of curvature at the fold is very important. In Japanese patent application JP-60 046819, it is a question of a metal plate, in which is formed a groove of V-shaped cross section. This plate is folded according to the groove. According to tests carried out by the applicants, it does not seem possible that the plate will not break when it is thus folded.
L'invention, qui entend remédier à l'inconvénient précité, a donc au moins pour but de faciliter le pliage d'une plaque métallique. A cet effet, l'invention a pour objet une plaque métallique, comportant un bord périphérique, ainsi qu'une première et une deuxième face opposées, caractérisée en ce qu'au moins un faisceau de plusieurs rainures obtenues par pressage, rectilignes, parallèles entre elles, groupées, reliant deux portions dudit bord périphérique l'une à l'autre et délimitées chacune par une paroi ayant globalement la forme d'un dièdre est ménagé dans ladite première face de la plaque métallique.The invention, which intends to remedy the aforementioned drawback, therefore has at least the aim of facilitating the folding of a metal plate. To this end, the invention relates to a metal plate, comprising a peripheral edge, as well as a first and a second opposite face, characterized in that at least one bundle of several grooves obtained by pressing, rectilinear, parallel between they, grouped, connecting two portions of said peripheral edge to each other and each delimited by a wall having the overall shape of a dihedral is formed in said first face of the metal plate.
Selon d'autres caractéristiques avantageuses de cette plaque métallique : la ou chaque paire de rainures consécutives dudit faisceau délimite une bande de la plaque, cette bande étant bombée du côté de ladite deuxième face ;According to other advantageous characteristics of this metal plate: the or each pair of consecutive grooves of said bundle delimits a strip of the plate, this strip being curved on the side of said second face;
- l'un des dièdres comporte une première face qui se trouve plus vers l'intérieur du faisceau que la deuxième face de ce dièdre, l'angle que forme la première face du dièdre et un plan globalement perpendiculaire à la plaque étant plus petit que l'angle que forme la deuxième face du dièdre et ledit plan ; - chacune des rainures du faisceau contient, un adhésif, au moins une portion de la première face de la plaque étant recouverte d'un film d'étanchéité obturant latéralement, ces rainures; - elle est pliée selon le faisceau de rainures, les deux faces de chaque dièdre étant collées l'une à l' autre .- one of the dihedrons has a first face which is located more towards the inside of the beam than the second face of this dihedron, the angle formed by the first face of the dihedron and a plane generally perpendicular to the plate being smaller than the angle formed by the second face of the dihedral and said plane; - Each of the grooves of the bundle contains, an adhesive, at least a portion of the first face of the plate being covered with a sealing film closing laterally, these grooves; - It is folded according to the bundle of grooves, the two faces of each dihedron being glued to each other.
L'invention a également pour objet un procédé de fabrication d'une plaque telle que définie ci-dessus, caractérisé en ce qu'il comporte une étape dans laquelle :The invention also relates to a method of manufacturing a plate as defined above, characterized in that it comprises a step in which:
(a) - on réalise le faisceau de plusieurs rainures en pressant la plaque entre un premier élément et un deuxième élément qui porte un faisceau de plusieurs nervures de conformation des rainures.(a) - the bundle of several grooves is produced by pressing the plate between a first element and a second element which carries a bundle of several ribs for shaping the grooves.
Selon d'autres caractéristiques avantageuses de ce procédé de fabrication, on bombe ladite bande du côté de la deuxième face de la plaque en effectuant l'étape (a), le premier élément portant au moins une gorge de conformation de ladite bande.According to other advantageous characteristics of this manufacturing process, said strip is bulged on the side of the second face of the plate by performing step (a), the first element carrying at least one conformation groove of said strip.
En outre, l'invention a pour objet un procédé de pliage d'une plaque métallique, caractérisé en ce que la plaque métallique est telle que définie ci-dessus et en ce qu'il comporte une étape dans laquelle : (b) - dans la plaque, on forme un pli selon le faisceau de rainures, de telle manière que ces rainures et la concavité du pli soient du même côté de la plaque.In addition, the subject of the invention is a method of folding a metal plate, characterized in that the metal plate is as defined above and in that it comprises a step in which: (b) - in the plate, a fold is formed according to the bundle of grooves, such that these grooves and the concavity of the fold are on the same side of the plate.
Selon d'autres caractéristiques avantageuses de ce procédé de pliage : - on effectue l'étape (b) manuellement ;According to other advantageous characteristics of this folding process: - step (b) is carried out manually;
- avant l'étape (b) , on applique un adhésif à l'intérieur de chacune des rainures du faisceau ;- before step (b), an adhesive is applied inside each of the grooves of the bundle;
- avant l'étape (b) , il comporte un procédé de fabrication tel que défini ci-dessus. L'invention sera bien comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels : - la figure 1 est une vue en perspective d'une plaque métallique conforme à l'invention ;- Before step (b), it includes a manufacturing process as defined above. The invention will be clearly understood on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which: - Figure 1 is a perspective view of a metal plate according to the invention;
- la figure 2 est une vue partielle, en coupe selon la ligne II-II de la figure 1 ; - la figure 3 est une vue en perspective de la plaque métallique des figures 1 et 2 après pliage ;- Figure 2 is a partial view, in section along the line II-II of Figure 1; - Figure 3 is a perspective view of the metal plate of Figures 1 and 2 after folding;
- la figure 4 est une vue analogue à la figure 2 et illustre une étape du procédé de pliage de la plaque représentée à cette figure 2 ; - la figure 5 est une vue partielle, en coupe selon la ligne V-V de la figure 3 ;- Figure 4 is a view similar to Figure 2 and illustrates a step in the folding process of the plate shown in this Figure 2; - Figure 5 is a partial view, in section along the line V-V of Figure 3;
- les figures 6 et 7 sont deux vues analogues à la figure 2 et illustrent respectivement deux étapes d'un procédé, conforme à l'invention, de fabrication de la plaque représentée aux figures 1 à 5 ; et- Figures 6 and 7 are two views similar to Figure 2 and respectively illustrate two steps of a method, according to the invention, for manufacturing the plate shown in Figures 1 to 5; and
- la figure 8 est une vue analogue à la figure 2 et représente une plaque métallique selon une variante de réalisation de l'invention.- Figure 8 is a view similar to Figure 2 and shows a metal plate according to an alternative embodiment of the invention.
Les figures 1 et 2 représentent une plaque métallique 1, qui est plane et comporte deux faces opposées 2 et 3 , ainsi qu'un bord périphérique 4.FIGS. 1 and 2 represent a metal plate 1, which is planar and has two opposite faces 2 and 3, as well as a peripheral edge 4.
La plaque 1 porte deux faisceaux 5 de rainures rectilignes, ménagées dans la face 2. Dans l'exemple représenté, les rainures d'un même faisceau 5 sont au nombre de trois et sont respectivement référencées 6, 7 et 8. Elles sont parallèles entre elles et relient deux portions du bord périphérique 4 l'une à l'autre.The plate 1 carries two bundles 5 of rectilinear grooves, formed in the face 2. In the example shown, the grooves of the same bundle 5 are three in number and are respectively referenced 6, 7 and 8. They are parallel between they and connect two portions of the peripheral edge 4 to each other.
Chacune de ces rainures 6, 7 et 8 est délimitée par une paroi ayant globalement la forme d'un dièdre 9, 10 ou 11. Tout comme chaque faisceau 5, chaque rainure centrale 7, qui s'étend entre les rainures latérales 6 et 8 du même faisceau 5 qu'elle, est symétrique par rapport à un plan Px perpendiculaire à la plaque 1. Dans chaque faisceau 5, l'une, référencée 12, des deux faces du dièdre 9 qui délimite la rainure latérale 6 est plus proche de la rainure centrale 7 que l'autre face 13 de ce dièdre 9. Elle s'étend selon un plan P2 globalement perpendiculaire à la plaque 1. En revanche, la face 13 et ce plan P2 forment un angle α non nul .Each of these grooves 6, 7 and 8 is delimited by a wall having the overall shape of a dihedral 9, 10 or 11. Just like each bundle 5, each central groove 7, which extends between the lateral grooves 6 and 8 of the same beam 5 as it is, is symmetrical with respect to a plane P x perpendicular to the plate 1. In each bundle 5, one, referenced 12, of the two faces of the dihedral 9 which delimits the lateral groove 6 is closer to the central groove 7 than the other face 13 of this dihedron 9. It extends along a plane P 2 generally perpendicular to the plate 1. On the other hand, the face 13 and this plane P 2 form a non-zero angle α.
La rainure 8 d'un faisceau 5 est symétrique de la rainure 6 de ce faisceau 5, si bien que sa forme se déduit de ce qui précède . La bande 14 que les deux rainures consécutives 6 et 7 de chaque faisceau 5 délimitent dans la plaque 4 est convexe du côté de la face 3 et concave du côté de la face 2. Il en est de même de la bande 14 qui s'étend entre les deux rainures consécutives 7 et 8 de chaque faisceau 5. Juste avant de plier la plaque 1, on applique un adhésif A au niveau des faisceaux 5, en prenant soin de faire pénétrer cet adhésif A dans les rainures 6, 7 et 8 , après quoi la plaque 1 est telle qu'illustrée à la figure 4. Le pliage de la plaque 1 est symbolisé par les flèches F représentées a la figure 1. Ce pliage, après lequel la plaque 1 est telle qu'illustrée aux figures 3 et 5, est effectué selon chaque faisceau 5, de telle manière que la concavité des plis 16 auxquels il conduit se trouvent du même côté de la plaque 1 que les rainures 6, 7 et 8. Conformément au but de l'invention, chaque faisceau 5 facilite le pliage de la plaque 1. Des essais ont montré que les faisceaux 5 rendent le pliage de la plaque 1 si aisé qu'il peut être effectué manuellement, par exemple par un particulier assemblant un meuble qui lui a été vendu en pièces détachées et dont est destinée à faire partie la plaque 1. Par conséquent, la plaque 1 présente l'avantage de pouvoir rester plane, donc d'encombrement faible, tant que son transport jusqu'au lieu de son montage n'a pas été achevé . Lorsque le pliage de la plaque 1 est achevé, les rainures 6, 7 et 8 sont fermées, comme on peut le voir à la figure 5. Les deux faces de chacun des dièdres 9, 10 et 11 sont collées l'une à l'autre, ce qui rigidifie la plaque 1 au niveau des plis 16 et s'oppose au redressement de cette plaque 1.The groove 8 of a bundle 5 is symmetrical with the groove 6 of this bundle 5, so that its shape is deduced from the above. The strip 14 which the two consecutive grooves 6 and 7 of each bundle 5 delimit in the plate 4 is convex on the side of the face 3 and concave on the side of the face 2. The same is true of the strip 14 which extends between the two consecutive grooves 7 and 8 of each bundle 5. Just before folding the plate 1, an adhesive A is applied at the beams 5, taking care to penetrate this adhesive A into the grooves 6, 7 and 8, after which the plate 1 is as illustrated in FIG. 4. The folding of the plate 1 is symbolized by the arrows F represented in FIG. 1. This folding, after which the plate 1 is as illustrated in FIGS. 3 and 5, is carried out according to each bundle 5, so that the concavity of the folds 16 to which it leads are on the same side of the plate 1 as the grooves 6, 7 and 8. According to the object of the invention, each bundle 5 facilitates the folding of the plate 1. Tests have shown that the beams 5 make the folding of the plate 1 so easy that it can be carried out manually, for example by a private individual assembling a piece of furniture which has been sold to him in spare parts and of which is intended to form part of the plate 1. Consequently, the plate 1 has the advantage of being able to remain flat, therefore of compact size, as long as its transport to the place of its assembly has not been completed. When the folding of the plate 1 is completed, the grooves 6, 7 and 8 are closed, as can be seen in FIG. 5. The two faces of each of the dihedrons 9, 10 and 11 are glued one to the other. other, which stiffens the plate 1 at the folds 16 and opposes the straightening of this plate 1.
De plus, comme chaque faisceau 5 comporte plusieurs rainures 6, 7 et 8, chaque pli 16 est constitué d'une succession de plis élémentaires, dont chacun s'est formé le long de l'une de ces rainures 6, 7 et 8. Il s'ensuit que la déformation résultant de chaque pliage est répartie entre ces plis élémentaires, si bien que la plaque 1 est nettement plus solide au niveau de chaque pli 16 que si chaque faisceau 5 était remplacé par une unique rainure 6, 7 ou 8.In addition, since each bundle 5 has several grooves 6, 7 and 8, each fold 16 consists of a succession of elementary folds, each of which is formed along one of these grooves 6, 7 and 8. It follows that the deformation resulting from each folding is distributed between these elementary folds, so that the plate 1 is much more solid at each fold 16 than if each bundle 5 was replaced by a single groove 6, 7 or 8 .
Avant le pliage, les deux faces de chacun des dièdres 9, 10 et 11 forment l'un de plusieurs angles α et β . La somme des angles α et β qui se trouvaient au niveau d'un faisceau 5 avant le pliage détermine l'angle γ que les deux portions de la plaque 1 séparées par le pli 16 s 'étendant selon ce faisceau 5 forment après le pliage.Before folding, the two faces of each of the dihedrons 9, 10 and 11 form one of several angles α and β. The sum of the angles α and β which were at a beam 5 before folding determines the angle γ that the two portions of the plate 1 separated by the fold 16 extending along this beam 5 form after folding.
Le rayon de courbure moyen R d'un pli 16 formé selon un faisceau 5 dépend de la profondeur p des rainures 6, 7 et 8 de ce- faisceau, du nombre de ces rainures, égal à trois dans l'exemple représenté, et de l'angle α ou β que forment les deux faces du dièdre 9, 10 ou 11 délimitant chacune de ces rainures 6, 7 et 8. Il dépend également de la distance d qui, avant le pliage, sépare les deux rainures latérales 6 et 8 du faisceau 5. Avantageusement, il est fait en sorte que plus ce rayon de courbure moyen R est élevé, plus le nombre de rainures du faisceau 5 est important .The average radius of curvature R of a fold 16 formed according to a beam 5 depends on the depth p of the grooves 6, 7 and 8 of this beam, on the number of these grooves, equal to three in the example shown, and on the angle α or β formed by the two faces of the dihedral 9, 10 or 11 delimiting each of these grooves 6, 7 and 8. It also depends on the distance d which, before folding, separates the two lateral grooves 6 and 8 of the bundle 5. Advantageously, it is ensured that the greater this mean radius of curvature R, the greater the number of grooves in the bundle 5.
Dans l'exemple représenté, les bandes 14 définissent des surfaces convexes. Si ces surfaces n'étaient pas convexes, mais par exemple planes, elles constitueraient des facettes après le pliage. La forme des surfaces convexes que définissent les bandes 14 est donc déterminée de telle manière qu'après le pliage de la plaque 1 ; ces facettes soient peu ou pas perceptibles à l'œil nu.In the example shown, the strips 14 define convex surfaces. If these surfaces were not convex, but for example planar, they would constitute facets after folding. The shape of the convex surfaces which the strips 14 define is therefore determined in such a way that after the folding of the plate 1; these facets are little or not perceptible to the naked eye.
Les rainures 6, 7 et 8 d'un même faisceau 5 et les bandes 14 délimitées par ces rainures sont imprimées simultanément, à l'aide de la matrice 17 et du poinçon 18 représentées aux figures 6 et 7. Un faisceau de nervures 19 que porte le poinçon 18 a une section transversale sensiblement complémentaire de chaque faisceau 5 de rainures.The grooves 6, 7 and 8 of the same bundle 5 and the bands 14 delimited by these grooves are printed simultaneously, using the die 17 and the punch 18 shown in Figures 6 and 7. A bundle of ribs 19 that carries the punch 18 has a cross section substantially complementary to each bundle 5 of grooves.
La matrice 17 porte deux gorges 20 dont chacune est destinée à rendre convexe une face d'une bande 14. Sur la figure 6, la plaque 1 vierge de' tout relief a été positionnée entre la matrice 17 et le poinçon 18, qui est déplacé vers la matrice 17. Le poinçon 18 est arrêté dès qu'il a atteint la position qui est illustrée à la figure 7 et dans laquelle ce poinçon 18 et la matrice 17 pressent entre eux la plaque 1 pour imprimer un faisceau 5 de trois rainures 6, 7 et 8, ainsi que chacune des bandes 14 délimitées par ces rainures.The die 17 carries two grooves 20 each of which is intended to make a face of a strip 14 convex. In FIG. 6, the plate 1, blank of any relief, has been positioned between the die 17 and the punch 18, which is moved towards the matrix 17. The punch 18 is stopped as soon as it has reached the position which is illustrated in FIG. 7 and in which this punch 18 and the matrix 17 press between them the plate 1 to print a bundle 5 of three grooves 6 , 7 and 8, as well as each of the bands 14 delimited by these grooves.
Ensuite, le poinçon 18 est écarté de la matrice 17, après quoi la plaque 1 peut être retirée. En variante, le poinçon 18 et la matrice 17 peuvent être remplacés par deux galets qui pressent entre eux la plaque 1 et dont chacun roule sur l'une des deux faces 2 et 3 de cette plaque 1.Then, the punch 18 is moved away from the die 17, after which the plate 1 can be removed. As a variant, the punch 18 and the die 17 can be replaced by two rollers which press between them the plate 1 and each of which rolls on one of the two faces 2 and 3 of this plate 1.
Lors de l'impression d'un faisceau 5, chaque nervure fend le métal de la plaque 1 plus qu'elle ne l'écrase. Cela est avantageux dans la mesure où l'écrasement d'un métal s'accompagne d'un écrouissage qui rend ce métal cassant.When printing a beam 5, each rib splits the metal of the plate 1 more than it crushes it. This is advantageous insofar as the crushing of a metal is accompanied by a hardening which makes this metal brittle.
La plaque 1 représentée à la figure 8 est identique à celle représentée à la figure 2, sauf en ce que les rainures 6, 7 et 8 de chacun de ses faisceaux 5 contiennent un adhésif 21 et sont obturées latéralement par un film d'étancheite 22 qui recouvre une bande de la face 2 de la plaque 1 et isole cet adhésif 21 de l'air atmosphérique. Juste avant de plier cette plaque 1, on retire les films d'étancheite 22, après quoi la plaque 1 est telle qu'illustrée à la figure 4.The plate 1 shown in Figure 8 is identical to that shown in Figure 2, except that the grooves 6, 7 and 8 of each of its bundles 5 contain an adhesive 21 and are closed laterally by a sealing film 22 which covers a strip of the face 2 of the plate 1 and isolates this adhesive 21 from atmospheric air. Just before folding this plate 1, the sealing films 22 are removed, after which the plate 1 is as illustrated in FIG. 4.
L'invention ne se limite pas aux modes de réalisation décrits précédemment. En particulier, chacune des rainures latérales 6 et 8 peut être sensiblement symétrique par rapport au plan P2 globalement perpendiculaire à la plaque 1. Lorsque tel est le cas, les rainures 6, 7 et 8 de chaque faisceau 5 peuvent être globalement identiques. The invention is not limited to the embodiments described above. In particular, each of the lateral grooves 6 and 8 can be substantially symmetrical with respect to the plane P 2 generally perpendicular to the plate 1. When this is the case, the grooves 6, 7 and 8 of each bundle 5 can be generally identical.

Claims

REVENDICATIONS
1. Plaque métallique, comportant un bord périphérique (4), ainsi qu'une première (2) et une deuxième face (3) opposées, caractérisée en ce qu'au moins un faisceau (5) de plusieurs rainures (6, 7, 8) obtenues par pressage, rectilignes, parallèles entre elles, groupées, reliant deux portions dudit bord périphérique (4) l'une à l'autre et délimitées chacune par une paroi ayant globalement la forme d'un dièdre (9, 10, 11) est ménagé dans ladite première face (2) de la plaque métallique.1. Metal plate, comprising a peripheral edge (4), as well as a first (2) and a second face (3) opposite, characterized in that at least one bundle (5) of several grooves (6, 7, 8) obtained by pressing, rectilinear, parallel to each other, grouped, connecting two portions of said peripheral edge (4) to each other and each delimited by a wall having the overall shape of a dihedral (9, 10, 11 ) is formed in said first face (2) of the metal plate.
2. Plaque selon la revendication 1, caractérisée en ce que la ou chaque paire de rainures consécutives dudit faisceau (5) délimite une bande (14) de la plaque, cette bande (14) étant bombée du côté de ladite deuxième face (3) .2. Plate according to claim 1, characterized in that the or each pair of consecutive grooves of said bundle (5) delimits a strip (14) of the plate, this strip (14) being curved on the side of said second face (3) .
3. Plaque selon la revendication 1 ou 2, caractérisée en ce qu'au moins l'un des dièdres (9, 11) comporte une première face (12) qui se trouve plus vers l'intérieur du faisceau (5) que la deuxième face (13) de ce dièdre (9, 11), l'angle que forme la première face (12) du dièdre (9, 11) et un plan (P2) globalement perpendiculaire à la plaque étant plus petit que l'angle (α) que forme la deuxième face (13) du dièdre (9, 11) et ledit plan (P2) .3. Plate according to claim 1 or 2, characterized in that at least one of the dihedrons (9, 11) has a first face (12) which is located more towards the inside of the bundle (5) than the second face (13) of this dihedral (9, 11), the angle formed by the first face (12) of the dihedral (9, 11) and a plane (P 2 ) generally perpendicular to the plate being smaller than the angle (α) that forms the second face (13) of the dihedral (9, 11) and said plane (P 2 ).
4. Plaque selon l'une quelconque des revendications précédentes, caractérisée en ce que chacune des rainures4. Plate according to any one of the preceding claims, characterized in that each of the grooves
(6, 7, 8) du faisceau (5) contient un adhésif (21) , au moins une portion de la première face (2) de la plaque étant recouverte d'un film (22) d'étancheite obturant latéralement ces rainures (6, 7, 8) .(6, 7, 8) of the bundle (5) contains an adhesive (21), at least a portion of the first face (2) of the plate being covered with a film (22) of sealing sealing laterally these grooves ( 6, 7, 8).
5. Plaque selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est pliée selon le faisceau (5) de rainures (6, 7, 8) , les deux faces de chaque dièdre (9, 10, 11) étant collées l'une à l'autre.5. Plate according to any one of the preceding claims, characterized in that it is folded according to the bundle (5) of grooves (6, 7, 8), the two faces of each dihedral (9, 10, 11) being glued to one another.
6. Procédé de fabrication d'une plaque (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une étape dans laquelle :6. Method for manufacturing a plate (1) according to any one of the preceding claims, characterized in that it comprises a step in which:
(a) - on réalise le faisceau (5) de plusieurs rainures (6, 7, 8) en pressant la plaque entre un premier élément (17) et un deuxième élément (18) qui porte un faisceau de plusieurs nervures (19) de conformation des rainures.(a) - the bundle (5) of several grooves (6, 7, 8) is produced by pressing the plate between a first element (17) and a second element (18) which carries a bundle of several ribs (19) of conformation of the grooves.
7. Procédé selon la revendication 6, pour fabriquer une plaque (1) selon la revendication 2, caractérisé en ce qu'on bombe ladite bande (14) du côté de la deuxième face (3) de la plaque (1) en effectuant l'étape (a), le premier élément (17) portant au moins une gorge (20) de conformation de ladite bande (14) .7. Method according to claim 6, for manufacturing a plate (1) according to claim 2, characterized in that said strip (14) is curved on the side of the second face (3) of the plate (1) by performing the step (a), the first element (17) carrying at least one groove (20) for shaping said strip (14).
8. Procédé de pliage d'une plaque métallique, caractérisé en ce que la plaque métallique (1) est selon l'une quelconque des revendications 1 à 4 et en ce qu'il comporte une étape dans laquelle :8. Method for folding a metal plate, characterized in that the metal plate (1) is according to any one of claims 1 to 4 and in that it comprises a step in which:
(b) - dans la plaque (1) , on forme un pli (16) selon le faisceau (5) de rainures (6, 7, 8) , de telle manière que ces rainures et la concavité du pli (16) soient du même côté de la plaque (1) . (b) - in the plate (1), a fold (16) is formed along the bundle (5) of grooves (6, 7, 8), such that these grooves and the concavity of the fold (16) are same side of the plate (1).
9 Procédé selon la revendication 8, caractérisé en ce qu'on effectue l'étape (b) manuellement.9 Method according to claim 8, characterized in that step (b) is carried out manually.
10. Procédé selon la revendication 8 ou 9, caractérisé en ce qu'avant l'étape (b) , on applique un adhésif (A ; 21) à l'intérieur de chacune des rainures (6, 7, 8) du faisceau (5) .10. Method according to claim 8 or 9, characterized in that before step (b), an adhesive (A; 21) is applied inside each of the grooves (6, 7, 8) of the bundle ( 5).
11. Procédé selon l'une des revendications 8 à 10, caractérisé en ce qu'avant l'étape (b) , il comporte un procédé selon l'une des revendications 6 et 7. 11. Method according to one of claims 8 to 10, characterized in that before step (b), it comprises a method according to one of claims 6 and 7.
EP03755618A 2002-07-19 2003-07-18 Metal plate, method for making same and method for folding same Withdrawn EP1523387A1 (en)

Applications Claiming Priority (3)

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FR0209225A FR2842443B1 (en) 2002-07-19 2002-07-19 METAL PLATE, ITS MANUFACTURING METHOD AND FOLDING METHOD
FR0209225 2002-07-19
PCT/FR2003/002284 WO2004009262A1 (en) 2002-07-19 2003-07-18 Metal plate, method for making same and method for folding same

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EP (1) EP1523387A1 (en)
JP (1) JP2005532912A (en)
KR (1) KR20060034617A (en)
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AU (1) AU2003273458A1 (en)
CA (1) CA2492814A1 (en)
FR (1) FR2842443B1 (en)
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CA2492814A1 (en) 2004-01-29
FR2842443A1 (en) 2004-01-23
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PL373406A1 (en) 2005-08-22
US20060147732A1 (en) 2006-07-06
AU2003273458A1 (en) 2004-02-09
KR20060034617A (en) 2006-04-24
CN1668397A (en) 2005-09-14
JP2005532912A (en) 2005-11-04
FR2842443B1 (en) 2005-02-11
WO2004009262A1 (en) 2004-01-29

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