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.

Applications Claiming Priority (3)

Publications (1)

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ID=29797599

Family Applications (1)

Country Status (11)

Families Citing this family (16)

Family Cites Families (11)

• 2002
  • 2002-07-19 FR FR0209225A patent/FR2842443B1/fr not_active Expired - Fee Related
• 2003
  • 2003-07-18 WO PCT/FR2003/002284 patent/WO2004009262A1/fr not_active Application Discontinuation
  • 2003-07-18 JP JP2004522265A patent/JP2005532912A/ja active Pending
  • 2003-07-18 CA CA 2492814 patent/CA2492814A1/fr not_active Abandoned
  • 2003-07-18 KR KR1020057000868A patent/KR20060034617A/ko not_active Application Discontinuation
  • 2003-07-18 PL PL37340603A patent/PL373406A1/xx unknown
  • 2003-07-18 RU RU2005104563/02A patent/RU2005104563A/ru not_active Application Discontinuation
  • 2003-07-18 AU AU2003273458A patent/AU2003273458A1/en not_active Abandoned
  • 2003-07-18 CN CNA038172119A patent/CN1668397A/zh active Pending
  • 2003-07-18 EP EP03755618A patent/EP1523387A1/de not_active Withdrawn
  • 2003-07-18 US US10/521,562 patent/US20060147732A1/en not_active Abandoned

Non-Patent Citations (1)

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