WO2023025997A1 - Head for folding the edge of a metal sheet by 180° with bearing roller and associated folding method - Google Patents

Head for folding the edge of a metal sheet by 180° with bearing roller and associated folding method Download PDF

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Publication number
WO2023025997A1
WO2023025997A1 PCT/FR2022/051477 FR2022051477W WO2023025997A1 WO 2023025997 A1 WO2023025997 A1 WO 2023025997A1 FR 2022051477 W FR2022051477 W FR 2022051477W WO 2023025997 A1 WO2023025997 A1 WO 2023025997A1
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WO
WIPO (PCT)
Prior art keywords
edge
folding
support
head
metal sheet
Prior art date
Application number
PCT/FR2022/051477
Other languages
French (fr)
Inventor
Jean Marie COQUET
Stephane CLEMENT
Sebastien Bech
Original Assignee
Psa Automobiles Sa
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 Psa Automobiles Sa filed Critical Psa Automobiles Sa
Priority to CN202280057719.1A priority Critical patent/CN117836074A/en
Publication of WO2023025997A1 publication Critical patent/WO2023025997A1/en

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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors

Definitions

  • the invention relates to the field of the shaping of stampings, in particular of motor vehicle bodywork elements, more particularly by bending.
  • the published patent document WO 2017/144791 A1 discloses a method of bending an edge of metal sheet against another edge of another metal sheet, with a view to crimping the edge and the other edge, by displacement of a bending head, by a robotic arm, along the edge in question.
  • the folding head includes a blade with a twisted contact surface configured to bend the edge against the other edge.
  • the transverse profile of the contact surface has a variation in inclination along said surface which is of the order of 180° so as to be able to bend the edge by 180° around the edge of the other edge. A single pass of the blade in question along the edge thus allows it to be folded against the other edge.
  • the tilting movement of the edge around the edge of the other edge may lack precision as to the height of the 180° bend, mainly due to the differences in stiffness in different directions of the robotic arm moving the bending head.
  • the published patent document EP 1 685 915 A1 discloses a bending head suitable for crimping two edges of metal sheets by folding one of said edges over the other of said edges by approximately 90°.
  • the folding head comprises two rollers with different angles of inclination, so as to achieve with the first roller a first folding and with the second roller a second folding.
  • the edge is thus folded against the other edge in a single pass of the folding head.
  • the first wheel is mounted to slide on a support of the head, against an elastic force or controlled by a hydraulic jack, so as to be able to follow a non- straight from the edge to be folded.
  • a support roller is secured to the first caster on the sliding support, so as to ensure tracking of the non-rectilinear contour.
  • the aim of the invention is to overcome at least one drawback of the aforementioned state of the art. More particularly, the aim of the invention is to allow crimping of two edges of metal sheets where one edge is folded over by approximately 180° on the other edge, with better control of the height of the 180° fold thus formed.
  • the subject of the invention is a head for bending an edge of a metal sheet, comprising a support; a contact surface with the edge, fixed to the support and capable of bending said edge during movement along said edge; a support roller on a die, fixed to the support; remarkable in that the contact surface extends along a twisted profile on a folding blade and is configured to fold the edge by at least 160° in a folding direction against another edge of another metal sheet; and the support roller is rotatable around an axis fixed with respect to the support.
  • the bending head comprises a part for coupling to a robotic arm, the support being movable in translation relative to the coupling part against an elastic force.
  • the support is movable in translation relative to the coupling part in the folding direction.
  • the coupling part comprises a fixing flange extending in a transverse plane, preferably perpendicular, to the folding direction.
  • the coupling part comprises a projecting part engaging in a movable manner in translation with an elongated portion of the support.
  • the projecting portion forms a cylinder and the elongated portion forms a pin engaging in sliding manner in said cylinder.
  • the support roller is oriented to bear against the die in the folding direction.
  • the support roller is rotatable around a fixed axis relative to the support and oriented in a direction perpendicular to the folding direction or inclined by 15° or less relative to said perpendicular direction.
  • the support roller is adjustable in position relative to the support in the folding direction, by means of one or more shims.
  • the invention also relates to a method for bending a metal sheet edge comprising the following steps: (a) depositing the metal sheet on a die; (b) laying another sheet metal on top of the sheet metal, with another edge adjacent to the edge; (c) folding the edge against the other edge by moving a folding head along said edge; remarkable in that the bending head is according to the invention, and the movement of the bending head in step (c) includes continuous rolling of the backing roller on the die along the edge.
  • step (c) the edge is bent by at least 160°.
  • the metal sheet is an outer wall of a motor vehicle sunroof, and the edge is bent beforehand at 90°, within a tolerance of ⁇ 20°, and delimits the roof opening.
  • the other metal sheet is a motor vehicle sunroof lining, and the other edge is bent beforehand at 90°, within a tolerance of ⁇ 20°, and delimits the roof opening.
  • the measures of the invention are advantageous in that they make it possible to crimp two edges of metal sheets by folding and folding one of said edges onto the other of said edges in an efficient and controlled manner as regards the height of the edge thus folded and folded over.
  • the use of a folding blade with a left and twisted contact surface is interesting in that it allows folding and folding over approximately 180° in a single pass, unlike folding rollers which, by their contact areas cylindrical annular rings, each of which only allows the edge to be bent by a limited angle, typically up to 45°.
  • the fact of providing the support roller fixed with respect to the bending blade thus makes it possible to control the position of the contact surface on said bending blade with respect to the rest of the metal sheets and, consequently, to control the geometry of the edge thus folded and folded down.
  • FIG 1 is a sectional view of two edges of crimped metal sheets, according to the invention.
  • FIG 2 is a perspective view of an exterior wall and a motor vehicle sunroof liner, the edges of which are being crimped by moving a bending head;
  • FIG 3 is a sectional view of the bending head of Figure 2.
  • Figure 1 in sectional view of two edges of metal sheets crimped by folding one of said edges against the other of said edges.
  • the metal sheet 2 comprises an edge 2.1 previously bent at approximately 90°, for example by "falling" during a shaping operation on a stamping press.
  • the other sheet metal 4 also includes an edge 4.1 previously bent at approximately 90°, similar to edge 2.1, and placed against said edge 2.1.
  • the latter is folded 180° around the edge 4.2 of the other edge 4.1 and folded against it, thus forming a 180° fold 2.2 and a folded portion 2.3.
  • the edge 2.1 before folding and folding is illustrated in dotted lines, corresponding to the 180° fold and the folded portion 2.3.
  • the folding and folding of the edge 2.1 can be done by relying on the edge 4.2 of the other edge 4.1 but this has the consequence that the height H of the folded edge 2.1 is determined by the height of the other edge 4.1. Or the latter may have a variable height along its extent, then leading to a non-constant height H along the edges 2.1 and 4.1 thus crimped.
  • the invention provides that the edge 2.1 in question be folded around and folded against the other edge 4.1 with a clearance in the bottom of the groove formed by the 180° fold 2.2, as illustrated in FIG. Such an approach then makes it possible to overcome the tolerances of the height of the other edge 4.1.
  • the edge 2.1 is folded around and folded against the other edge 4.1 by means of a folding head and a corresponding method illustrated in Figures 2 and 3.
  • Figure 2 is a perspective view of an outer wall 2 and a lining 4 of a motor vehicle sunroof, the edges of which are crimped by moving a folding head.
  • the outer wall corresponds to sheet metal 2 in Figure 1 and the liner corresponds to the other sheet metal 4 in Figure 1.
  • the respective edges 2.1 and 4.1 visible in Figure 1 are present in Figure 2 along the opening of the sunroof, however difficult to see.
  • the metal sheet 2 is placed against a die 6 specially dimensioned and shaped for this operation.
  • a folding head 8 is applied against the edge to be folded and moved along said edge in order to fold it and fold it against the other edge, in order to obtain the crimp illustrated in FIG.
  • the bending head 8 is supported by a robotic arm, not shown, well known in itself to those skilled in the art.
  • Figure 3 is a sectional view of the folding head 8.
  • the folding head 8 comprises a support 10 to which is fixed a folding blade 12 and a support roller 14.
  • the folding blade 12 may be as disclosed in the published patent document WO 2017/144791 A1, that is that is to say formed essentially of a solid body having a surface in contact with the edge, said surface being left and twisted essentially in a direction generally parallel to the working direction of the blade.
  • the surface in question may correspond to a surface formed by a preferentially rectilinear generatrix which moves in translation along the edge of the folding blade 12 while undergoing a rotation corresponding to the folding and folding of the edge.
  • the variation in inclination of the transverse profile of the contact surface, from an entry zone to the exit zone essentially corresponds to the folding angle which must be applied to the edge.
  • the bending head 8 also includes a part 16 for coupling with the robotic arm.
  • the coupling part 16 comprises a flange 16.1 for fixing to the robotic arm and a cylindrical part 16.2 projecting from the fixing flange 16.1.
  • THE support 10 is mounted to move in translation, against an elastic force, on the coupling part 16.
  • the support 10 comprises a central part 10.1 on which the blade 12 and the support roller 14 are fixed, and an elongated part 10.2, forming a pin, slidingly engaging in the cylindrical part 16.2 of the coupling piece 16.
  • the pin comprises a proximal portion with a cylindrical outer surface slidably mounted in a guide ring 16.3 mounted on the distal end of the cylindrical part 16.2 of the coupling part 16, and a distal end portion supporting a slider 10.3 slidably mounted in a bore of said cylindrical part 16.2 of the coupling part 16
  • a spring 18, in this case compression, is housed in the cylindrical part 16.2 of the coupling part 16, with a first end against a bearing surface 16.4 of said cylindrical part 16.2 and a second end against a support ring 10.4 fixed to the spindle formed by the elongated part 10.2 of the support 10.
  • the spindle in question forms a shoulder on which the support ring 10.4 abuts.
  • the spring 18 thus exerts an elastic force on the support 10, via the support ring 10.4 and the elongated part 10.2 of said support 10.
  • the folding blade 12 has its contact surface against the folded portion 2.3 of the edge 2.1 of the metal sheet 2 corresponding in this case to an outer roof skin , against the other edge 4.1 of the other metal sheet 4 corresponding in this case to a roof lining.
  • the folding direction is then vertical and parallel to the other edge 4.1.
  • the support roller 14 is adjacent to the folding blade 12 and is configured to bear against the die 6 in a direction corresponding to the folding direction. More specifically, the axis of rotation of the support roller 14, represented by the generally horizontal axis line, is perpendicular to the folding direction, which in this case is vertical, or at least forms with said perpendicular an angle 15° or less.
  • the support roller When moving the folding head 8 along the edge 2.1 to fold and fold against the other edge 4.1, the support roller is applied against a reference surface of the die 6, adjacent to said edges 2.1 and 4.1, so as to control and control the height of the folding blade 12 and therefore of its contact surface with the edge 2.1. This contact is facilitated by the assembly sliding in translation against a force elastic of the support 10 on the coupling part 16.
  • the robotic arm to which the coupling part 16 is fixed can thus, when the bending head 8 moves along the edge 2.1, exert a force on the support 10 via the spring 18, this force then being taken up by the support roller 14 rolling on the die 6.
  • the sliding against an elastic force, in the bending head 8, as described above is optional in that the movement by the robotic arm can be sufficiently precise to ensure permanent contact of the support roller 14 against the matrix.
  • the robotic arm also has an intrinsic elasticity which can replace or complete the mobile assembly against an elastic force described above.
  • the folding blade 12 is mounted on an intermediate piece 20 having an L-shaped profile allowing the support roller 14 to be housed in the hollow of the L, directly adjacent to the folding blade 12 which is fixed to one end of the small branch of the L.
  • the support roller 14 is mounted on the intermediate part 20 via a spacer 22 making it possible to ensure exact and rigid positioning.
  • This shim 22 can thus be supplemented or replaced by one or more other shims.
  • the matrix 6 comprises two distinct parts, namely an inner part 6.1 and an outer part 6.2 adjacent to the inner part 6.1, it being understood, however, that it can also be in one piece.
  • the rolling surface 6.2.1 of the die 6 on which the bearing roller 14 rolls is directly adjacent to the lateral bearing surface 6.2.2 of the edge 2.1 and in height relative to the frontal bearing surface 6.1. 1 of the sheet metal 2.
  • the rolling surface 6.2.1 is advantageously perpendicular to the lateral support surface 6.2.2 or inclined by 15° or less with respect to said perpendicular. It is however understood that the running surface 6.2.1 may be at different heights relative to the frontal support surface
  • the amplitude of bending and folding of the edge of the metal sheet is of the order of 180°. However, it is understood that it can be lower, for example up to 160°. In this case the edge of the metal sheet in the unfolded state can be pre-bent at a small angle, for example up to 20°.
  • the folding and folding amplitude can be greater, in which case the edge in the unfolded state can be pre-folded in the opposite direction to the folding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The invention relates to a head (8) for folding an edge (2.1) of a metal sheet (2), comprising a support (10); an edge contact surface (2.1), which surface is attached to the support (10) and is capable of folding the edge (2.1) as it moves along the edge; a roller (14) bearing on a die (6), which roller is attached to the support (10); the contact surface extending along a twisted profile on a folding blade (12) and being configured to fold the edge (2.1) by at least 160° in a folding direction against another edge (4.1) of another metal sheet (4); and the bearing roller (14) being capable of being rotated about an axis that is stationary relative to the support (10).

Description

DESCRIPTION DESCRIPTION
TÊTE DE PLIAGE DE BORD DE TÔLE MÉTALLIQUE A 180° AVEC GALET D'APPUI ET METHODE DE PLIAGE ASSOCIEE 180° METAL SHEET EDGE BENDING HEAD WITH SUPPORT ROLLER AND ASSOCIATED BENDING METHOD
Domaine technique Technical area
La présente invention revendique la priorité de la demande française 2108851 déposée le 24 août 2021 , dont le contenu (texte, dessins et revendications) est ici incorporé par référence. The present invention claims the priority of French application 2108851 filed on August 24, 2021, the content of which (text, drawings and claims) is incorporated herein by reference.
L’invention a trait au domaine de la mise en forme d’emboutis, en particulier d’éléments de carrosserie de véhicule automobile, plus particulièrement par pliage. The invention relates to the field of the shaping of stampings, in particular of motor vehicle bodywork elements, more particularly by bending.
Technique antérieure Prior technique
Le document de brevet publié WO 2017/144791 A1 divulgue un procédé de pliage d’un bord de tôle métallique contre un autre bord d’une autre tôle métallique, en vue d’un sertissage du bord et de l’autre bord, par déplacement d’une tête de pliage, par un bras robotisé, le long du bord en question. La tête de pliage comprend une lame avec une surface de contact vrillée configurée pour plier le bord contre l’autre bord. Le profil transversal de la surface de contact présente une variation d'inclinaison le long de ladite surface qui est de l’ordre de 180° de manière à pouvoir plier le bord de 180° autour de la tranche de l’autre bord. Un seul passage de la lame en question le long du bord permet ainsi de le plier contre l’autre bord. The published patent document WO 2017/144791 A1 discloses a method of bending an edge of metal sheet against another edge of another metal sheet, with a view to crimping the edge and the other edge, by displacement of a bending head, by a robotic arm, along the edge in question. The folding head includes a blade with a twisted contact surface configured to bend the edge against the other edge. The transverse profile of the contact surface has a variation in inclination along said surface which is of the order of 180° so as to be able to bend the edge by 180° around the edge of the other edge. A single pass of the blade in question along the edge thus allows it to be folded against the other edge.
Dans le sertissage décrit ci-avant, le mouvement de basculement du bord autour de la tranche de l’autre bord peut manquer de précision quant à la hauteur du pli à 180°, essentiellement en raison des différences de raideur dans différentes directions du bras robotisé déplaçant la tête de pliage. In the crimp described above, the tilting movement of the edge around the edge of the other edge may lack precision as to the height of the 180° bend, mainly due to the differences in stiffness in different directions of the robotic arm moving the bending head.
Le document de brevet publié EP 1 685 915 A1 divulgue une tête de pliage apte à sertir deux bords de tôles métalliques en rabattant d’environ 90° un desdits bords sur l’autre desdits bords. La tête de pliage comprend deux roulettes avec des angles d’inclinaison différents, de manière à réaliser avec la première roulette un premier pliage et avec la deuxième roulette un deuxième pliage. Le bord est ainsi rabattu contre l’autre bord en un seul passage de la tête de pliage. La première roulette est montée coulissante sur un support de la tête, contre un effort élastique ou commandé par un vérin hydraulique, de manière à pouvoir suivre un contour non- rectiligne du bord à plier. Un galet d’appui est solidaire de la première roulette sur le support coulissant, de manière à assurer un suivi du contour non-rectiligne. Cette solution est intéressante mais ne permet pas de mieux contrôler la position du pli car la première roulette et la deuxième roulette se limitent à rabattre le bord préalablement plié à environ 90°. The published patent document EP 1 685 915 A1 discloses a bending head suitable for crimping two edges of metal sheets by folding one of said edges over the other of said edges by approximately 90°. The folding head comprises two rollers with different angles of inclination, so as to achieve with the first roller a first folding and with the second roller a second folding. The edge is thus folded against the other edge in a single pass of the folding head. The first wheel is mounted to slide on a support of the head, against an elastic force or controlled by a hydraulic jack, so as to be able to follow a non- straight from the edge to be folded. A support roller is secured to the first caster on the sliding support, so as to ensure tracking of the non-rectilinear contour. This solution is interesting but does not allow better control of the position of the fold because the first roller and the second roller are limited to folding the previously folded edge at approximately 90°.
Exposé de l'invention Disclosure of Invention
L’invention a pour objectif de pallier au moins un inconvénient de l’état de la technique susmentionné. Plus particulièrement, l’invention a pour objectif de permettre un sertissage de deux bords de tôles métalliques où un bord est rabattu d’environ 180° sur l’autre bord, avec un meilleur contrôle de la hauteur du pli à 180° ainsi formé. The aim of the invention is to overcome at least one drawback of the aforementioned state of the art. More particularly, the aim of the invention is to allow crimping of two edges of metal sheets where one edge is folded over by approximately 180° on the other edge, with better control of the height of the 180° fold thus formed.
L’invention a pour objet une tête de pliage d’un bord d’une tôle métallique, comprenant un support ; une surface de contact avec le bord, fixée au support et apte à plier ledit bord lors d’un déplacement le long dudit bord ; un galet d’appui sur une matrice, fixé au support ; remarquable en ce que la surface de contact s’étend suivant un profil vrillé sur une lame de pliage et est configurée pour rabattre le bord d’au moins 160° dans une direction de rabattement contre un autre bord d’une autre tôle métallique ; et le galet d’appui est rotatif autour d’un axe fixe par rapport au support. The subject of the invention is a head for bending an edge of a metal sheet, comprising a support; a contact surface with the edge, fixed to the support and capable of bending said edge during movement along said edge; a support roller on a die, fixed to the support; remarkable in that the contact surface extends along a twisted profile on a folding blade and is configured to fold the edge by at least 160° in a folding direction against another edge of another metal sheet; and the support roller is rotatable around an axis fixed with respect to the support.
Selon un mode avantageux de l’invention, la tête de pliage comprend une pièce d’accouplement à un bras robotisé, le support étant mobile en translation par rapport à la pièce d’accouplement contre un effort élastique. According to an advantageous embodiment of the invention, the bending head comprises a part for coupling to a robotic arm, the support being movable in translation relative to the coupling part against an elastic force.
Selon un mode avantageux de l’invention, le support est mobile en translation par rapport à la pièce d’accouplement dans la direction de rabattement. According to an advantageous embodiment of the invention, the support is movable in translation relative to the coupling part in the folding direction.
Selon un mode avantageux de l’invention, la pièce d’accouplement comprend une bride de fixation s’étendant dans un plan transversal, préférentiellement perpendiculaire, à la direction de rabattement. According to an advantageous embodiment of the invention, the coupling part comprises a fixing flange extending in a transverse plane, preferably perpendicular, to the folding direction.
Selon un mode avantageux de l’invention, la pièce d’accouplement comprend une partie en saillie s’engageant de manière mobile en translation avec une portion allongée du support. Selon un mode avantageux de l’invention, la portion en saillie forme un cylindre et la portion allongée forme une broche s’engageant de manière coulissante dans ledit cylindre. According to an advantageous embodiment of the invention, the coupling part comprises a projecting part engaging in a movable manner in translation with an elongated portion of the support. According to an advantageous embodiment of the invention, the projecting portion forms a cylinder and the elongated portion forms a pin engaging in sliding manner in said cylinder.
Selon un mode avantageux de l’invention, le galet d’appui est orienté pour prendre appui sur la matrice dans la direction de rabattement. According to an advantageous embodiment of the invention, the support roller is oriented to bear against the die in the folding direction.
Selon un mode avantageux de l’invention, le galet d’appui est rotatif autour d’un axe fixe par rapport au support et orienté suivant une direction perpendiculaire à la direction de rabattement ou incliné de 15° ou moins par rapport à ladite direction perpendiculaire. According to an advantageous embodiment of the invention, the support roller is rotatable around a fixed axis relative to the support and oriented in a direction perpendicular to the folding direction or inclined by 15° or less relative to said perpendicular direction. .
Selon un mode avantageux de l’invention, le galet d’appui est ajustable en position par rapport au support dans la direction de rabattement, au moyen d’une ou plusieurs cales d’épaisseur. According to an advantageous embodiment of the invention, the support roller is adjustable in position relative to the support in the folding direction, by means of one or more shims.
L’invention a également pour objet un procédé de pliage d’un bord de tôle métallique comprenant les étapes suivantes : (a) dépose de la tôle métallique sur une matrice ; (b) dépose d’une autre tôle métallique sur la tôle métallique, avec un autre bord adjacent au bord ; (c) pliage du bord contre l’autre bord par déplacement d’une tête de pliage le long dudit bord ; remarquable en ce que la tête de pliage est selon l’invention, et le déplacement de la tête de pliage à l’étape (c) comprend un roulement continu du galet d’appui sur la matrice le long du bord. The invention also relates to a method for bending a metal sheet edge comprising the following steps: (a) depositing the metal sheet on a die; (b) laying another sheet metal on top of the sheet metal, with another edge adjacent to the edge; (c) folding the edge against the other edge by moving a folding head along said edge; remarkable in that the bending head is according to the invention, and the movement of the bending head in step (c) includes continuous rolling of the backing roller on the die along the edge.
Avantageusement, à l’étape (c), le bord est plié d’au moins 160°. Advantageously, in step (c), the edge is bent by at least 160°.
Avantageusement, la tôle métallique est une paroi extérieure de toit ouvrant de véhicule automobile, et le bord est préalablement plié à 90°, dans une tolérance de ±20°, et délimite l’ouverture du toit. Avantageusement, l’autre tôle métallique est une doublure de toit ouvrant de véhicule automobile, et l’autre bord est préalablement plié à 90°, dans une tolérance de ±20°, et délimite l’ouverture du toit. Advantageously, the metal sheet is an outer wall of a motor vehicle sunroof, and the edge is bent beforehand at 90°, within a tolerance of ±20°, and delimits the roof opening. Advantageously, the other metal sheet is a motor vehicle sunroof lining, and the other edge is bent beforehand at 90°, within a tolerance of ±20°, and delimits the roof opening.
Les mesures de l’invention sont avantageuses en ce qu’elles permettent de réaliser un sertissage de deux bords de tôles métalliques par pliage et rabattement d’un des dits bord sur l’autre des desdits bords de manière efficace et maitrisée en ce qui concerne la hauteur du bord ainsi plié et rabattu. L’utilisation d’une lame de pliage avec une surface de contact gauche et vrillée est intéressante en ce qu’elle permet de réaliser un pliage et rabattement sur environ 180° en une seule passe, contrairement aux roulettes de pliage qui, de par leurs surfaces de contact annulaires cylindriques, ne permettent de plier, chacune, le bord que d’un angle limité, typiquement jusqu’à 45°. Le fait de prévoir le galet d’appui fixe par rapport à la lame de pliage permet ainsi de contrôler la position de la surface de contact sur ladite lame de pliage par rapport au reste des tôles métalliques et, partant, de contrôler la géométrie du bord ainsi plié et rabattu. The measures of the invention are advantageous in that they make it possible to crimp two edges of metal sheets by folding and folding one of said edges onto the other of said edges in an efficient and controlled manner as regards the height of the edge thus folded and folded over. The use of a folding blade with a left and twisted contact surface is interesting in that it allows folding and folding over approximately 180° in a single pass, unlike folding rollers which, by their contact areas cylindrical annular rings, each of which only allows the edge to be bent by a limited angle, typically up to 45°. The fact of providing the support roller fixed with respect to the bending blade thus makes it possible to control the position of the contact surface on said bending blade with respect to the rest of the metal sheets and, consequently, to control the geometry of the edge thus folded and folded down.
Brève description des dessins Brief description of the drawings
[Fig 1] est une vue en coupe de deux bords de tôles métalliques sertis, selon l’invention ; [Fig 1] is a sectional view of two edges of crimped metal sheets, according to the invention;
[Fig 2] est une vue en perspective d’une paroi extérieure et d’une doublure de toit ouvrant de véhicule automobile, dont les bords sont en train d’être sertis par déplacement d’une tête de pliage ; [Fig 2] is a perspective view of an exterior wall and a motor vehicle sunroof liner, the edges of which are being crimped by moving a bending head;
[Fig 3] est une vue en coupe de la tête de pliage de la figure 2. [Fig 3] is a sectional view of the bending head of Figure 2.
Description détaillée detailed description
La figure 1 en vue en coupe de deux bords de tôles métalliques sertis par pliage d’un desdits bords contre l’autre desdits bords. Figure 1 in sectional view of two edges of metal sheets crimped by folding one of said edges against the other of said edges.
La tôle métallique 2 comprend un bord 2.1 préalablement plié à environ 90°, par exemple par « tombage » lors d’une opération de mise en forme sur une presse d’emboutissage. L’autre tôle métallique 4 comprend également un bord 4.1 préalablement plié à environ 90°, similairement au bord 2.1 , et disposé contre ledit bord 2.1 . Ce dernier est plié à 180° autour de la tranche 4.2 de l’autre bord 4.1 et rabattu contre celui-ci, formant ainsi un pli à 180° 2.2 et une portion rabattue 2.3. Le bord 2.1 avant pliage et rabattement est illustré en trait pointillé, correspondant au pli à 180° et à la portion rabattue 2.3. Le pliage et rabattement du bord 2.1 peut se faire en s’appuyant sur la tranche 4.2 de l’autre bord 4.1 mais cela a pour conséquence que la hauteur H du bord 2.1 rabattu est déterminée par la hauteur de l’autre bord 4.1 . Or ce dernier peut présenter une hauteur variable de long de son étendue, conduisant alors à une hauteur H non-constante le long des bords 2.1 et 4.1 ainsi sertis. The metal sheet 2 comprises an edge 2.1 previously bent at approximately 90°, for example by "falling" during a shaping operation on a stamping press. The other sheet metal 4 also includes an edge 4.1 previously bent at approximately 90°, similar to edge 2.1, and placed against said edge 2.1. The latter is folded 180° around the edge 4.2 of the other edge 4.1 and folded against it, thus forming a 180° fold 2.2 and a folded portion 2.3. The edge 2.1 before folding and folding is illustrated in dotted lines, corresponding to the 180° fold and the folded portion 2.3. The folding and folding of the edge 2.1 can be done by relying on the edge 4.2 of the other edge 4.1 but this has the consequence that the height H of the folded edge 2.1 is determined by the height of the other edge 4.1. Or the latter may have a variable height along its extent, then leading to a non-constant height H along the edges 2.1 and 4.1 thus crimped.
Il est souhaitable d’obtenir une hauteur H du bord 2.1 rabattu qui est constante et maîtrisée le long de son étendue. A cet effet, l’invention prévoit que le bord 2.1 en question soit plié autour et rabattu contre l’autre bord 4.1 avec un jeu dans le fond de la gorge formée par le pli à 180° 2.2, tel qu’illustré à la figure 1 . Une telle approche permet alors de s’affranchir des tolérances de la hauteur de l’autre bord 4.1 . A cet effet, le bord 2.1 est plié autour et rabattu contre l’autre bord 4.1 au moyen d’une tête de pliage et d’un procédé correspondant illustrés aux figures 2 et 3. It is desirable to obtain a height H of the folded edge 2.1 which is constant and controlled along its extent. To this end, the invention provides that the edge 2.1 in question be folded around and folded against the other edge 4.1 with a clearance in the bottom of the groove formed by the 180° fold 2.2, as illustrated in FIG. Such an approach then makes it possible to overcome the tolerances of the height of the other edge 4.1. For this purpose, the edge 2.1 is folded around and folded against the other edge 4.1 by means of a folding head and a corresponding method illustrated in Figures 2 and 3.
La figure 2 est une vue en perspective d’une paroi extérieure 2 et d’une doublure 4 de toit ouvrant de véhicule automobile, dont les bords sont sertis par déplacement d’une tête de pliage. La paroi extérieure correspond à la tôle métallique 2 de la figure 1 et la doublure correspondant à l’autre tôle métallique 4 de la figure 1 . Les bords respectifs 2.1 et 4.1 visibles à la figure 1 sont présents à la figure 2 le long de l’ouverture du toit ouvrant, toutefois difficilement visibles. La tôle métallique 2 est disposée contre une matrice 6 spécialement dimensionnée et mise en forme pour cette opération. Figure 2 is a perspective view of an outer wall 2 and a lining 4 of a motor vehicle sunroof, the edges of which are crimped by moving a folding head. The outer wall corresponds to sheet metal 2 in Figure 1 and the liner corresponds to the other sheet metal 4 in Figure 1. The respective edges 2.1 and 4.1 visible in Figure 1 are present in Figure 2 along the opening of the sunroof, however difficult to see. The metal sheet 2 is placed against a die 6 specially dimensioned and shaped for this operation.
Une tête de pliage 8 est appliquée contre le bord à plier et déplacée le long dudit bord en vue de le plier et le rabattre contre l’autre bord, afin d’obtenir le sertissage illustré à la figure 1 . La tête de pliage 8 est supportée par un bras robotisé non représenté, en soi bien connu de l’homme de métier. A folding head 8 is applied against the edge to be folded and moved along said edge in order to fold it and fold it against the other edge, in order to obtain the crimp illustrated in FIG. The bending head 8 is supported by a robotic arm, not shown, well known in itself to those skilled in the art.
La figure 3 est une vue en coupe de la tête de pliage 8. Figure 3 is a sectional view of the folding head 8.
La tête de pliage 8 comprend un support 10 auquel est fixée une lame de pliage 12 et un galet d’appui 14. La lame de pliage 12 peut être telle que divulguée dans le document de brevet publié WO 2017/144791 A1 , c’est-à-dire formée essentiellement d’un corps massif présentant une surface de contact avec le bord, ladite surface étant gauche et vrillée essentiellement suivant une direction généralement parallèle à la direction de travail de la lame. La surface en question peut correspondre à une surface formée par une génératrice préférentiellement rectiligne qui se déplace en translation le long du bord de la lame de pliage 12 en subissant une rotation correspondant au pliage et rabattement du bord. La variation d'inclinaison du profil transversal de la surface de contact, depuis une zone d'entrée jusqu'à la zone de sortie, correspond essentiellement à l'angle de rabattement qui doit être appliqué au bord. The folding head 8 comprises a support 10 to which is fixed a folding blade 12 and a support roller 14. The folding blade 12 may be as disclosed in the published patent document WO 2017/144791 A1, that is that is to say formed essentially of a solid body having a surface in contact with the edge, said surface being left and twisted essentially in a direction generally parallel to the working direction of the blade. The surface in question may correspond to a surface formed by a preferentially rectilinear generatrix which moves in translation along the edge of the folding blade 12 while undergoing a rotation corresponding to the folding and folding of the edge. The variation in inclination of the transverse profile of the contact surface, from an entry zone to the exit zone, essentially corresponds to the folding angle which must be applied to the edge.
La tête de pliage 8 comprend également une pièce 16 d’accouplement avec le bras robotisé. La pièce d’accouplement 16 comprend une bride 16.1 de fixation au bras robotisé et une partie cylindrique 16.2 en saillie de la bride de fixation 16.1 . Le support 10 est monté mobile en translation, contre un effort élastique, sur la pièce d’accouplement 16. En l’occurrence, le support 10 comprend une partie centrale 10.1 sur laquelle sont fixés la lame 12 et le galet d’appui 14, et une partie allongée 10.2, formant une broche, s’engageant de manière coulissante dans la partie cylindrique 16.2 de la pièce d’accouplement 16. On peut observer que la broche comprend une portion proximale avec une surface extérieure cylindrique montée coulissante dans une bague de guidage 16.3 montée sur l’extrémité distale de la partie cylindrique 16.2 de la pièce d’accouplement 16, et une portion distale, d’extrémité, supportant un coulisseau 10.3 monté coulissant dans un alésage de ladite partie cylindrique 16.2 de la pièce d’accouplement 16. Un ressort 18, en l’occurrence de compression, est logé dans la partie cylindrique 16.2 de la pièce d’accouplement 16, avec une première extrémité contre une surface d’appui 16.4 de ladite partie cylindrique 16.2 et une deuxième extrémité contre une bague d’appui 10.4 fixée à la broche formée par la partie allongée 10.2 du support 10. Dans cet exemple de réalisation, la broche en question forme un épaulement sur lequel la bague d’appui 10.4 vient en butée. Le ressort 18 exerce ainsi un effort élastique sur le support 10, via la bague d’appui 10.4 et la partie allongée 10.2 dudit support 10.The bending head 8 also includes a part 16 for coupling with the robotic arm. The coupling part 16 comprises a flange 16.1 for fixing to the robotic arm and a cylindrical part 16.2 projecting from the fixing flange 16.1. THE support 10 is mounted to move in translation, against an elastic force, on the coupling part 16. In this case, the support 10 comprises a central part 10.1 on which the blade 12 and the support roller 14 are fixed, and an elongated part 10.2, forming a pin, slidingly engaging in the cylindrical part 16.2 of the coupling piece 16. It can be seen that the pin comprises a proximal portion with a cylindrical outer surface slidably mounted in a guide ring 16.3 mounted on the distal end of the cylindrical part 16.2 of the coupling part 16, and a distal end portion supporting a slider 10.3 slidably mounted in a bore of said cylindrical part 16.2 of the coupling part 16 A spring 18, in this case compression, is housed in the cylindrical part 16.2 of the coupling part 16, with a first end against a bearing surface 16.4 of said cylindrical part 16.2 and a second end against a support ring 10.4 fixed to the spindle formed by the elongated part 10.2 of the support 10. In this embodiment, the spindle in question forms a shoulder on which the support ring 10.4 abuts. The spring 18 thus exerts an elastic force on the support 10, via the support ring 10.4 and the elongated part 10.2 of said support 10.
En référence à la vue de détail de la figure 3, on peut observer que la lame de pliage 12 a sa surface de contact contre la portion rabattue 2.3 du bord 2.1 de la tôle métallique 2 correspondant en l’occurrence à une peau extérieure de toit, contre l’autre bord 4.1 de l’autre tôle métallique 4 correspondant en l’occurrence à une doublure de toit. La direction de rabattement est alors verticale et parallèle à l’autre bord 4.1 . Le galet d’appui 14 est adjacent à la lame de pliage 12 et est configuré pour prendre appui sur la matrice 6 dans une direction correspondant à la direction de rabattement. Plus précisément, l’axe de rotation du galet d’appui 14, représenté par le trait d’axe généralement horizontal, est perpendiculaire à la direction de rabattement, qui est en l’occurrence verticale, ou du moins forme avec ladite perpendiculaire un angle de 15° ou moins. Referring to the detail view of Figure 3, it can be seen that the folding blade 12 has its contact surface against the folded portion 2.3 of the edge 2.1 of the metal sheet 2 corresponding in this case to an outer roof skin , against the other edge 4.1 of the other metal sheet 4 corresponding in this case to a roof lining. The folding direction is then vertical and parallel to the other edge 4.1. The support roller 14 is adjacent to the folding blade 12 and is configured to bear against the die 6 in a direction corresponding to the folding direction. More specifically, the axis of rotation of the support roller 14, represented by the generally horizontal axis line, is perpendicular to the folding direction, which in this case is vertical, or at least forms with said perpendicular an angle 15° or less.
Lors du déplacement de la tête de pliage 8 le long du bord 2.1 à plier et rabattre contre l’autre bord 4.1 , le galet d’appui est appliqué contre une surface de référence de la matrice 6, adjacente audit bords 2.1 et 4.1 , de manière à contrôler et maîtriser la hauteur de la lame de pliage 12 et donc de sa surface de contact avec le bord 2.1. Ce contact est facilité par le montage coulissant en translation contre un effort élastique du support 10 sur la pièce d’accouplement 16. Le bras robotisé auquel la pièce d’accouplement 16 est fixée peut ainsi, lors du déplacement de la tête de pliage 8 le long du bord 2.1 , exercer un effort sur le support 10 via le ressort 18, cet effort étant alors repris par le galet d’appui 14 roulant sur la matrice 6. Cet effort élastique assure alors un contact permanent du galet d’appui 14 sur la matrice lors du déplacement de la tête de pliage 8 de long du bord 2.1 à plier et rabattre, et, partant, un positionnement exact, dans la direction de rabattement, de la surface de contact de la lame de pliage 12. Ces mesures permettent ainsi de réaliser un jeu de fond de gorge dans le pli 2.2 à 180° du bord 2.1 , et ainsi de réaliser une hauteur H du bord 2.1 constante, comme discuté ci-avant en relation avec la figure 1 . When moving the folding head 8 along the edge 2.1 to fold and fold against the other edge 4.1, the support roller is applied against a reference surface of the die 6, adjacent to said edges 2.1 and 4.1, so as to control and control the height of the folding blade 12 and therefore of its contact surface with the edge 2.1. This contact is facilitated by the assembly sliding in translation against a force elastic of the support 10 on the coupling part 16. The robotic arm to which the coupling part 16 is fixed can thus, when the bending head 8 moves along the edge 2.1, exert a force on the support 10 via the spring 18, this force then being taken up by the support roller 14 rolling on the die 6. This elastic force then ensures permanent contact of the support roller 14 on the die when the bending head 8 moves along of the edge 2.1 to fold and fold, and, therefore, an exact positioning, in the direction of folding, of the contact surface of the folding blade 12. These measures thus make it possible to achieve a groove bottom clearance in the fold 2.2 at 180° from the edge 2.1, and thus to achieve a constant height H of the edge 2.1, as discussed above in relation to FIG.
Il est à noter que le coulissement contre un effort élastique, dans la tête de pliage 8, tel que décrit ci-avant est optionnel en ce que le déplacement par le bras robotisé peut être suffisamment précis pour assurer un contact permanent du galet d’appui 14 contre la matrice. Le bras robotisé présente également une élasticité intrinsèque pouvant remplacer ou compléter le montage mobile contre un effort élastique décrit ci-avant. It should be noted that the sliding against an elastic force, in the bending head 8, as described above is optional in that the movement by the robotic arm can be sufficiently precise to ensure permanent contact of the support roller 14 against the matrix. The robotic arm also has an intrinsic elasticity which can replace or complete the mobile assembly against an elastic force described above.
Encore en référence à la vue de détail de la figure 3, on peut observer que la lame de pliage 12 est montée sur une pièce intermédiaire 20 présentant un profil en L permettant de loger le galet d’appui 14, dans le creux du L, directement adjacent à la lame de pliage 12 fixée elle à une extrémité de la petite branche du L. Le galet d’appui 14 est monté sur la pièce intermédiaire 20 via une cale d’épaisseur 22 permettant d’assurer un positionnement exact et rigide. Cette cale d’épaisseur 22 peut ainsi être complétée ou remplacée par une ou plusieurs autres cales d’épaisseur. Again with reference to the detail view of Figure 3, it can be seen that the folding blade 12 is mounted on an intermediate piece 20 having an L-shaped profile allowing the support roller 14 to be housed in the hollow of the L, directly adjacent to the folding blade 12 which is fixed to one end of the small branch of the L. The support roller 14 is mounted on the intermediate part 20 via a spacer 22 making it possible to ensure exact and rigid positioning. This shim 22 can thus be supplemented or replaced by one or more other shims.
Toujours en référence à la vue de détail de la figure 3, on peut observer que la matrice 6 comprend deux parties distinctes, à savoir une partie intérieure 6.1 et une partie extérieure 6.2 adjacente à la partie intérieure 6.1 , étant toutefois entendu qu’elle peut aussi être d’un seul tenant. La surface de roulement 6.2.1 de la matrice 6 sur laquelle roule le galet d’appui 14 est directement adjacente à la surface d’appui latéral 6.2.2 du bord 2.1 et en hauteur par rapport à la surface d’appui frontal 6.1 .1 de la tôle métallique 2. La surface de roulement 6.2.1 est avantageusement perpendiculaire à la surface d’appui latéral 6.2.2 ou inclinée de 15° ou moins par rapport à ladite perpendiculaire. Il est toutefois entendu que la surface de roulement 6.2.1 peut être à des hauteurs différentes par rapport à la surface d’appui frontalStill with reference to the detail view of Figure 3, it can be seen that the matrix 6 comprises two distinct parts, namely an inner part 6.1 and an outer part 6.2 adjacent to the inner part 6.1, it being understood, however, that it can also be in one piece. The rolling surface 6.2.1 of the die 6 on which the bearing roller 14 rolls is directly adjacent to the lateral bearing surface 6.2.2 of the edge 2.1 and in height relative to the frontal bearing surface 6.1. 1 of the sheet metal 2. The rolling surface 6.2.1 is advantageously perpendicular to the lateral support surface 6.2.2 or inclined by 15° or less with respect to said perpendicular. It is however understood that the running surface 6.2.1 may be at different heights relative to the frontal support surface
6.1.1. 6.1.1.
Dans la description de l’invention faite ci-avant, l’amplitude de pliage et rabattement du bord de la tôle métallique est de l’ordre de 180°. Il est toutefois entendu qu’il peut être plus faible, par exemple jusqu’à 160°. Dans ce cas le bord de la tôle métallique à l’état non rabattu peut être pré-plié d’un angle faible, par exemple jusque 20°.In the description of the invention given above, the amplitude of bending and folding of the edge of the metal sheet is of the order of 180°. However, it is understood that it can be lower, for example up to 160°. In this case the edge of the metal sheet in the unfolded state can be pre-bent at a small angle, for example up to 20°.
Similairement l’amplitude de pliage et rabattement peut être plus grande, auquel cas le bord à l’état non rabattu peut être pré-plié dans le sens opposé au rabattement.Similarly the folding and folding amplitude can be greater, in which case the edge in the unfolded state can be pre-folded in the opposite direction to the folding.
Dans ces deux cas, les avantages de l’invention sont présents, compte tenu de la faible valeur de l’angle de pré-pliage. In these two cases, the advantages of the invention are present, given the low value of the pre-bend angle.

Claims

9 9
REVENDICATIONS
[Revendication 1 .] Tête de pliage (8) d’un bord (2.1 ) d’une tôle métallique (2), comprenant : [Claim 1.] Folding head (8) of an edge (2.1) of a metal sheet (2), comprising:
- un support (10) ; - a support (10);
- une surface de contact avec le bord (2.1 ), fixée au support (10) et apte à plier ledit bord (2.1 ) lors d’un déplacement le long dudit bord ; - a contact surface with the edge (2.1), fixed to the support (10) and capable of bending said edge (2.1) during movement along said edge;
- un galet (14) d’appui sur une matrice (6), fixé au support (10) ; caractérisé en ce que la surface de contact s’étend suivant un profil vrillé sur une lame de pliage (12) et est configurée pour rabattre le bord (2.1 ) d’au moins 160° dans une direction de rabattement contre un autre bord (4.1 ) d’une autre tôle métallique (4) ; et le galet d’appui (14) est rotatif autour d’un axe fixe par rapport au support (10). - a roller (14) bearing on a die (6), fixed to the support (10); characterized in that the contact surface extends along a twisted profile on a folding blade (12) and is configured to fold the edge (2.1) by at least 160° in a direction of folding against another edge (4.1 ) of another metal sheet (4); and the support roller (14) is rotatable about an axis fixed with respect to the support (10).
[Revendication 2.] Tête de pliage (8) selon la revendication 1 , comprenant une pièce (16) d’accouplement à un bras robotisé, le support (10) étant mobile en translation par rapport à la pièce d’accouplement (16) contre un effort élastique. [Claim 2.] Folding head (8) according to claim 1, comprising a part (16) for coupling to a robotic arm, the support (10) being movable in translation relative to the coupling part (16) against an elastic force.
[Revendication 3.] Tête de pliage (8) selon la revendication 2, dans laquelle le support (10) est mobile en translation par rapport à la pièce d’accouplement (16) dans la direction de rabattement. [Claim 3.] Folding head (8) according to claim 2, in which the support (10) is movable in translation relative to the coupling part (16) in the folding direction.
[Revendication 4.] Tête de pliage (8) selon l’une des revendications 2 et 3, dans laquelle la pièce d’accouplement (16) comprend une bride de fixation[Claim 4.] Folding head (8) according to one of Claims 2 and 3, in which the coupling piece (16) comprises a fixing flange
(16.1 ) s’étendant dans un plan perpendiculaire à la direction de rabattement. (16.1) extending in a plane perpendicular to the folding direction.
[Revendication 5.] Tête de pliage (8) selon l’une des revendications 2 à 4, dans laquelle la pièce d’accouplement (16) comprend une partie en saillie[Claim 5.] Folding head (8) according to one of Claims 2 to 4, in which the coupling part (16) comprises a projecting part
(16.2) s’engageant de manière mobile en translation avec une portion allongée (10.2) du support (10). (16.2) movably engaging in translation with an elongated portion (10.2) of the support (10).
[Revendication 6.] Tête de pliage (8) selon la revendication 5, dans laquelle la portion en saillie (16.2) forme un cylindre et la portion allongée (10.2) forme une broche s’engageant de manière coulissante dans ledit cylindre. [Revendication 7.] Tête de pliage (8) selon l’une des revendications 1 à 6, dans laquelle le galet d’appui (14) est orienté pour prendre appui sur la matrice dans la direction de rabattement. [Claim 6.] Folding head (8) according to claim 5, wherein the projecting portion (16.2) forms a cylinder and the elongated portion (10.2) forms a pin slidably engaging said cylinder. [Claim 7.] Folding head (8) according to one of Claims 1 to 6, in which the support roller (14) is oriented to bear on the die in the folding direction.
[Revendication 8.] Tête de pliage (8) selon l’une des revendications 1 à 7, dans laquelle le galet d’appui (14) est rotatif autour d’un axe fixe par rapport au support (10) et orienté suivant une direction perpendiculaire à la direction de rabattement ou incliné de 15° ou moins par rapport à ladite direction perpendiculaire. [Claim 8.] Folding head (8) according to one of Claims 1 to 7, in which the support roller (14) is rotatable about an axis fixed with respect to the support (10) and oriented along a direction perpendicular to the folding direction or inclined by 15° or less with respect to said perpendicular direction.
[Revendication 9.] Tête de pliage (8) selon l’une des revendications 1 à 8, dans laquelle le galet d’appui (14) est ajustable en position par rapport au support (10) dans la direction de rabattement, au moyen d’une ou plusieurs cales d’épaisseur (22). [Claim 9.] Folding head (8) according to one of Claims 1 to 8, in which the support roller (14) is adjustable in position relative to the support (10) in the folding direction, by means of one or more shims (22).
[Revendication 10.] Procédé de pliage d’un bord (2.1 ) de tôle métallique (2) comprenant les étapes suivantes : [Claim 10.] Method of bending an edge (2.1) of sheet metal (2) comprising the following steps:
(a) dépose de la tôle métallique (2) sur une matrice (6) ; (a) depositing the metal sheet (2) on a die (6);
(b) dépose d’une autre tôle métallique (4) sur la tôle métallique (2), avec un autre bord (4.1 ) adjacent au bord (2.1 ) ; (b) depositing another metal sheet (4) on the metal sheet (2), with another edge (4.1) adjacent to the edge (2.1);
(c) pliage du bord (2.1 ) contre l’autre bord (4.1 ) par déplacement d’une tête de pliage (8) le long dudit bord (2.1 ) ; caractérisé en ce que la tête de pliage (8) est selon l’une des revendications 1 à 9, et le déplacement de la tête de pliage (8) à l’étape (c) comprend un roulement continu du galet d’appui (14) sur la matrice (6) le long du bord (c) folding the edge (2.1) against the other edge (4.1) by moving a folding head (8) along said edge (2.1); characterized in that the folding head (8) is according to one of claims 1 to 9, and the displacement of the folding head (8) in step (c) comprises a continuous rolling of the support roller ( 14) on the die (6) along the edge
PCT/FR2022/051477 2021-08-24 2022-07-22 Head for folding the edge of a metal sheet by 180° with bearing roller and associated folding method WO2023025997A1 (en)

Priority Applications (1)

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CN202280057719.1A CN117836074A (en) 2021-08-24 2022-07-22 Folding head for folding an edge of a metal sheet by 180 DEG, with an application roller, and associated folding method

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FR2108851 2021-08-24
FR2108851A FR3126324A1 (en) 2021-08-24 2021-08-24 180° METAL SHEET EDGE FOLDING HEAD WITH SUPPORT ROLLER

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2108851A1 (en) 1970-10-13 1972-05-26 Mediations Sciente Centre
JP2000005834A (en) * 1998-06-24 2000-01-11 Toyotomi Kiko Co Ltd Successive form processing method for thin plate elasticity plastic material, flange part, and device to be used for it
EP1685915A1 (en) 2005-01-31 2006-08-02 EDAG Engineering + Design Aktiengesellschaft Hemming method with pre- and final hemming tool
EP2714298A1 (en) * 2011-05-24 2014-04-09 Comau S.p.A. Hemming head device and method
DE102014015020A1 (en) * 2014-10-08 2015-04-23 Daimler Ag Method and tool for processing at least one sheet metal component
WO2017144791A1 (en) 2016-02-22 2017-08-31 Psa Automobiles S.A. Blade and method for crimping metal sheets
FR3097144A1 (en) * 2019-06-14 2020-12-18 Psa Automobiles Sa Friction crimping tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2108851A1 (en) 1970-10-13 1972-05-26 Mediations Sciente Centre
JP2000005834A (en) * 1998-06-24 2000-01-11 Toyotomi Kiko Co Ltd Successive form processing method for thin plate elasticity plastic material, flange part, and device to be used for it
EP1685915A1 (en) 2005-01-31 2006-08-02 EDAG Engineering + Design Aktiengesellschaft Hemming method with pre- and final hemming tool
EP2714298A1 (en) * 2011-05-24 2014-04-09 Comau S.p.A. Hemming head device and method
DE102014015020A1 (en) * 2014-10-08 2015-04-23 Daimler Ag Method and tool for processing at least one sheet metal component
WO2017144791A1 (en) 2016-02-22 2017-08-31 Psa Automobiles S.A. Blade and method for crimping metal sheets
FR3097144A1 (en) * 2019-06-14 2020-12-18 Psa Automobiles Sa Friction crimping tool

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