WO2016156690A1 - Head for crimping between two metal sheets of an automotive body element, provided with a tool combining a shaping ramp and a roller - Google Patents

Head for crimping between two metal sheets of an automotive body element, provided with a tool combining a shaping ramp and a roller Download PDF

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Publication number
WO2016156690A1
WO2016156690A1 PCT/FR2016/050538 FR2016050538W WO2016156690A1 WO 2016156690 A1 WO2016156690 A1 WO 2016156690A1 FR 2016050538 W FR2016050538 W FR 2016050538W WO 2016156690 A1 WO2016156690 A1 WO 2016156690A1
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WO
WIPO (PCT)
Prior art keywords
edge
crimping
piece
roller
ramp
Prior art date
Application number
PCT/FR2016/050538
Other languages
French (fr)
Inventor
Francois HELLEUX
Dominique GAUVIN
Original Assignee
Peugeot Citroen Automobiles Sa
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Filing date
Publication date
Application filed by Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Publication of WO2016156690A1 publication Critical patent/WO2016156690A1/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
    • 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
    • B21D39/023—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 using rollers

Definitions

  • the present invention is in the field of crimping between the edges of two sheet metal parts.
  • the present invention relates more particularly to robots equipped with a crimping head held and moved by the robot along the edges of two pieces of sheet metal, to fold them against each other to form an automobile bodywork element.
  • the present invention is part of the crimping by an automaton, or robot, the edges of sheet metal parts such as respectively formed of the outer panel and the lining of a motor vehicle opening.
  • the robot of the present invention relates more specifically to robots equipped with a crimping head moved by the robot along a vertically pre-folded edge of the panel, the crimping head being provided with a shape tool causing in one only passes the flap of the pre-folded edge of the panel against an edge of the liner. Crimping is frequently used in the field of motor vehicles to assemble two sheet metal parts forming a bodywork element of the vehicle, such as an opening.
  • the crimping operation is currently subdivided into two main stages: a first step, called pre-crimping, consists in bending at 90 ° an edge of a first part to orient it vertically relative to the general plane of the first part ; a second step, called crimping, consists of folding and applying the previously folded edge of the first piece to an edge of the second piece, to assemble said edges to one another and therefore the pieces one to the other.
  • the pieces are installed in an overlay on a die and a robot is commonly used to move a crimping head along the pre-folded edge of the first piece.
  • the crimping head is provided with a tool causing the flap and forced application of the pre-folded edge of the first piece against the edge of the second piece.
  • the tool is of the roller type or of the shape ramp type.
  • the roller gradually causes the flap then the forced application of the pre-folded edge of the first piece against the edge of the second piece.
  • Several passes of the crimping head along the pre-folded edge of the first piece are then necessary.
  • the document FR 2 990 887 (PEUGEOT CITROEN
  • AUTOMOBILES describes such a crimping process using a robot equipped with a roller crimping head.
  • a roller inclined at 45 ° to the general plane of the superposed parts causes the flap at 45 ° from the pre-folded edge of the first piece towards the edge of the second piece.
  • the roller is then oriented parallel to the general plane of the superimposed parts and causes the flap of the pre-folded edge of the first piece parallel to the edge of the second piece.
  • the roller causes crushing of the pre-folded edge of the first piece against the edge of the second piece.
  • the shape ramp during a single pass gradually causes the flap and the forced application. the pre-folded edge of the first piece against the edge of the second piece.
  • PEUGEOT CITROEN AUTOMOBILES To maintain the parts relative to each other during the crimping operation, different techniques for holding parts to each other are applied.
  • the parts are held together by gluing, spot welding or punching, or even as proposed by the document FR2 988 311 (PEUGEOT CITROEN AUTOMOBILES), by matting means a ribbed wheel placed at the front of the shape ramp according to its direction of movement along the edge of the pieces.
  • matting means a ribbed wheel placed at the front of the shape ramp according to its direction of movement along the edge of the pieces.
  • Such crimping techniques deserve to be improved. Indeed considering the robots equipped with a roller crimping head, the need to operate several passes is binding. Considering the robots equipped with a form-crimping crimping head, the crimping obtained in a single pass is advantageous, but the friction of the shape ramp against the edge of the first part is important and deleterious. Such friction causes in particular the alteration of any protective coating of the sheet forming the first part, such as an anticorrosion coating commonly based on zinc.
  • a crimping head equipped with a suitable tool, in a single pass, to fold and forcefully apply the pre-folded edge of a first sheet metal part against the edge of a second sheet metal part, and this by limiting the deleterious effects induced by the friction generated by the application of the tool along the pre-folded edge of the first piece.
  • the present invention is part of such a research and aims to propose for this purpose a crimping device comprising a crimping head movable by a robot along the edges of sheet metal parts to be assembled together, including a panel and the lining of an opening of a motor vehicle, providing in a single pass the crimping of the parts together avoiding at best to alter the surface of the part subjected to friction by application against its edge of a tool equipping the crimping head.
  • Such research is part of a constant framework of rigorous economic constraints in the field of the automobile, imposing notably to reduce at best the production costs of the motor vehicles.
  • the research of the present invention is part of a framework of potentially unacceptable constraints with regard to the benefits provided and essentially aimed at:
  • the crimping device between two sheet metal parts of the present invention comprises:
  • such a matrix forms an anvil on which are placed in superposition the sheet metal parts of which at least two respective edges are crimped to one another, said anvil cooperating with a means of pressing said edges one against the other providing their crimping between them.
  • a crimping head mounted on a robot for moving the crimping head in a direction of movement along a set path.
  • the crimping head is provided with a suitable tool, in a single pass during the movement of the crimping head by the robot in said direction of displacement, to fold down and forcefully apply an edge of a first piece against an edge a second room.
  • the tool comprises a ramp of shape able to gradually fold back by deforming the edge of the first piece against the edge of the second piece.
  • the approach of the present invention is based on the observation that such a shape ramp applies constant sliding friction forces against the edge of the first piece, from the initiation of its flap to the edge of the second piece up to the pressing force operated by the tool providing crimping between the edges of the pieces.
  • said pressing force as usually operated by the shape ramp, is particularly deleterious for the surface of the edge of the first piece pressed by the shape ramp.
  • the present invention proposes to dissociate the application modes by the tool of the efforts respectively providing on the one hand the flap of the edge of the first piece substantially against the edge of the second piece, and on the other hand by pressing the edge of the first piece against the edge of the second piece providing their crimping to one another.
  • the crimping device of the present invention as previously defined, is mainly recognizable in that the tool further comprises at least one roller capable of applying force, against the edge of the second piece, the edge of the first piece previously folded by the shaped ramp substantially against the edge of the second piece.
  • the rolling surface of the roller is arranged, in the direction of movement of the crimping head, at the rear of the shape ramp in extension of its trailing edge. An escape at the trailing edge of the shape ramp from the edge of the first piece due to its flap substantially against the edge of the second piece is followed by pressing the edge of the first piece by the roller.
  • the trailing edge of the shape ramp is obviously understood as being the edge of the shape ramp to which escapes the zone of the edge of the first piece previously folded by the ramp of form substantially against the edge of the second part, as a result of the movement of the crimping head by the robot in said direction of movement along its set path.
  • the generatrix of the rolling surface of the roller located closest to the matrix, said crimping generator is taken into consideration.
  • a gap is preferably provided between the separation distances from the die respectively of the crimping generator and the trailing edge of the shape ramp, the crimping generator being arranged closer to the die than the trailing edge of the shape ramp.
  • the rear face of the shaped ramp preferably comprises a passage clearance of the rolling surface of the roller, limiting the separation distance, in the direction of movement of the crimping head, between the trailing edge of the shape ramp. and the crimping generator.
  • the generatrix defining the surface of revolution of the roller is oriented substantially parallel to the trailing edge of the shape ramp.
  • the axis of rotation of the roller is oriented substantially parallel to the trailing edge of the shape ramp, to a possible inclination near the trailing edge of the shape ramp relative to the general plane of extension of the die.
  • the respective orientations of the axis of rotation of the roller and the generator defining the surface of revolution of the roller are adapted to the arrangement of the shape ramp and its trailing edge in particular. Indeed, to satisfactorily apply by means of the roller the pressing force of the edge of the first part providing the crimping of the parts together, the generatrix defining the surface of revolution of the roller is in particular substantially oriented parallel to the general plane of the matrix.
  • the tool comprises a body incorporating the manufacturing guide ramp.
  • the roller is then potentially mounted rotating on the body.
  • the shape ramp and the roller are individually mounted on the crimping head.
  • the tool may comprise a plurality of rollers with parallel axes of rotation.
  • Said rollers in plurality are more particularly placed successively at the rear of the trailing edge of the shape ramp in the direction of movement of the crimping head, at respective distances from the die being closer and closer to the next die a direction opposite to the direction of movement of the crimping head.
  • the plurality of rollers is able to apply a progressive pressing of the edge of the first piece against the edge of the second piece to crimp them to each other.
  • the present invention also relates to a method of crimping between two sheet metal parts implementing a crimping device as just described.
  • the method of the present invention essentially comprises the following operations: -) fold down the edge of the first piece by means of the shape ramp substantially against the edge of the second piece, then
  • an initial operation is carried out prior to the flap by means of the ramp shape of the edge of the first piece substantially against the edge of the second piece.
  • said initial operation is a 90 ° folding operation of the edge of the first piece relative to the general plane of the first piece.
  • the shape ramp comprises for example a surface of vnllage edge of the first part arranged helically, so that the shape ramp applies a progressive twisting at 90 ° from the edge of the first part to place it in superposition against the edge of the second piece, before crimping them to one another by means of the roller.
  • the present invention implementing as described above the crimping method by means of the crimping device, is particularly advantageously applicable to the crimping between the respective edges of a panel and a lining constituting at least part of an opening of a motor vehicle.
  • the following advantages will be noted:
  • the pooling of the shape ramp and the roller component at least partly the tool equipping the crimping head of the present invention reduces the stresses resulting from the friction exerted by the tool against the first part during crimping parts between them.
  • the sliding friction traditionally operated by the shape ramp during the crimping of the parts are optimal when pressing the edge of the first part.
  • Such pressing being according to the present invention carried out by the roller, the sliding friction traditionally operated by the shape ramp to cause the crimping of the parts together, is replaced by a rolling friction operated by the roller.
  • Such rolling friction has the advantageous effect of obtaining adequate pressing of the edge of the first part during crimping of the parts together, while limiting the surface stresses resulting from the friction of the tool against the edge of the first part.
  • the speed of movement of the crimping head along its set path is dependent on the forces provided by the tool to fold the edge of the first piece and then in continuity to crimp the parts together.
  • the pressing of the edge of the first piece to cause the crimping of the parts between them being operated by the roller, the speed of movement of the crimping head along its target path can be increased.
  • the surface condition of the parts whose edges are pressed against each other for their crimping is improved, with the advantage of avoiding a surface finishing operation parts crimped to each other. other.
  • the costs incurred by the maintenance operations of the crimping head are reduced compared with those involving the use of only a shaped ramp to fold the edge of the first part and crimp the parts together.
  • a single commercial running roller of simple structure can be used to equip the tool.
  • Such a roller may be of robust structure to space operations for maintenance.
  • such a roller rotatably mounted on the crimping head via a rotation axis of constant orientation, is easily accessible by an operator and can be easily and quickly mounted and / or disassembled for its replacement at lower costs.
  • fig.1, fig.2 and fig.3 are illustrations of a crimping head according to the present invention, respectively represented in perspective, in side view and in front view.
  • a crimping device between two pieces 1, 2 in sheets essentially comprises a crimping head 3 movable by a robot 4 and a support matrix 5 superimposed parts 1, 2 in crimping position, at least their crimped edges between them.
  • the crimping head 3 is provided with a tool 6 causing, as a result of the movement of the crimping head 3 by the robot 4 along the edges of the parts 1, 2 in a given direction of displacement DP, the flap of the edge 7 from a first piece 1 to the edge 8 of a second piece 2. Then, following the flap of the edge 7 of the first piece 1, the tool 6 crimps the edges 7,8 parts 1, 2 the one to the other by exerting a pressure against the edge 7 previously folded of the first piece 1 against the edge 8 of the second piece 2.
  • the tool 6 comprises on the one hand a shape ramp 9 causing the flap of the edge 7 of the first piece 1 to the edge 8 of the second piece 2, and secondly a roller 10 pressing the edge 7 of the first piece 1 against the edge 8 of the second piece 2 to realize their crimping to one another. More particularly, the escapement of the flanged edge 7 of the first piece 1 out of the shape ramp 9 at its trailing edge 11, is followed by pressing by the roller 10 of the flanged edge 7 of the first piece 1 against the edge 8 of the second piece 2.
  • the roller 10 is placed behind the trailing edge 11 of the shape ramp 9, at which the trailing edge 11 of the edge 7 of the first part 1 escapes from the shape ramp 9 as a result of its flap by the shape of the ramp 9 towards and substantially against the edge 8 of the second part 2. More specifically, it should be considered that the rolling surface of the roller 10 is disposed in extension of the surface of the shaped ramp 9 causing the flap of the edge 7 of the first part 1 substantially against the edge 8 of the second part 2.
  • the edge 7 of the first part 1 is as conventionally folded at 90 ° relative to the general plane of the first part 1.
  • the shape ramp 9 is in this case shaped like a helix, by twisting the flap of the edge 7 of the first piece 1 towards and substantially against the edge 8 of the second piece 2, until its escape from the form ramp 9 at its edge. leak 11.
  • the rear face 12 of the shape ramp 9 To place the roller 10 as close as possible to the trailing edge 11 of the shape ramp 9, the rear face 12 of the shape ramp 9, the rear notion being considered in the direction of movement of the crimping head by the robot, has a clearance 13 for passage of the rolling surface of the roller 10 facing said rear face, particularly visible in FIG.
  • the crimping generator G is in particular oriented substantially parallel to the trailing edge 11 of the guide ramp 9.
  • a gap E is provided between the distances d2, d3 separating the matrix 5 respectively from the crimping generator G and the trailing edge 11 of the shape ramp 9.
  • the crimping generator G is placed closer to the die 5 than the trailing edge 11 of the shape ramp 9.
  • the mounting of the shaped ramp 9 and the roller 10 on the crimping head 3 can be advantageously performed without significant difficulty.
  • the roller 10 and the shape ramp 9 are individually mounted on the crimping head 3.
  • the axis of rotation A of the roller 10 is oriented substantially parallel to the trailing edge 11 of the shape ramp 9, the notion of substantially parallel being to be appreciated in view of said preferred inclination with respect to the plane P of the following matrix, of the trailing edge 11 extending transversely to the direction of movement DP of the crimping head 3 by the robot 4.

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

Abstract

The invention concerns a device for crimping between two sheet metal parts (1,2), comprising a crimping head (3) mounted on a robot (4) for moving the crimping head(3) in a movement direction (DP). The crimping head (3) is provided with a tool (6) which is able, in a single pass of the crimping head (3) by the robot (4), to fold and to apply with force an edge (7) of a first part (1) against an edge (8) of a second part (2). The tool (6) comprises a shaping ramp (9) for progressively folding, by deformation, the edge (7) of the first part (1) against the edge (8) of the second part (2), and a roller (10) arranged at the rear of the shaping ramp (9) to apply with force the edge (7) of the first part (1), folded beforehand by the shaping ramp (9), against the edge (8) of the second part (2).

Description

TETE DE SERTISSAGE ENTRE DEUX TOLES D'UN ELEMENT DE CARROSSERIE AUTOMOBILE, MUNIE D'UN OUTIL ASSOCIANT UNE RAMPE  CRUSHING HEAD BETWEEN TWO SHEETS OF A CAR BODY COMPONENT HAVING A TOOL ASSOCIATING A RAMP
DE FORME ET UN GALET. La présente invention est du domaine de l'assemblage par sertissage entre les bords de deux pièces en tôle. La présente invention relève plus particulièrement des robots équipés d'une tête de sertissage maintenue et déplacée par le robot le long des bords de deux pièces en tôles, pour les plier l'une contre l'autre afin de former un élément de carrosserie automobile.  SHAPE AND A ROLL. The present invention is in the field of crimping between the edges of two sheet metal parts. The present invention relates more particularly to robots equipped with a crimping head held and moved by the robot along the edges of two pieces of sheet metal, to fold them against each other to form an automobile bodywork element.
La présente invention s'inscrit dans le cadre du sertissage par un automate, ou robot, des bords de pièces en tôle telles que respectivement formées du panneau extérieur et de la doublure d'un ouvrant de véhicule automobile. Le robot de la présente invention relève plus spécifiquement des robots équipés d'une tête de sertissage déplacée par le robot le long d'un bord pré-plié verticalement du panneau, la tête de sertissage étant munie d'un outil de forme provoquant en une seule passe le rabat du bord pré-plié du panneau contre un bord de la doublure. Le sertissage est fréquemment utilisé dans le domaine des véhicules automobiles pour assembler entre elles deux pièces en tôle formant un élément de carrosserie du véhicule, tel qu'un ouvrant. The present invention is part of the crimping by an automaton, or robot, the edges of sheet metal parts such as respectively formed of the outer panel and the lining of a motor vehicle opening. The robot of the present invention relates more specifically to robots equipped with a crimping head moved by the robot along a vertically pre-folded edge of the panel, the crimping head being provided with a shape tool causing in one only passes the flap of the pre-folded edge of the panel against an edge of the liner. Crimping is frequently used in the field of motor vehicles to assemble two sheet metal parts forming a bodywork element of the vehicle, such as an opening.
L'opération de sertissage est couramment subdivisée en deux étapes principales : une première étape, dite de pré-sertissage, consiste à plier à 90° un bord d'une première pièce pour l'orienter verticalement par rapport au plan général de la première pièce ; une deuxième étape, dite de sertissage, consiste à rabattre et à appliquer le bord préalablement plié de la première pièce vers un bord de la deuxième pièce, pour assembler lesdits bords l'un à l'autre et par suite les pièces l'une à l'autre. Pour opérer l'étape de sertissage, les pièces sont installées en superposition sur une matrice et un robot est couramment mis en œuvre pour déplacer une tête de sertissage le long du bord pré-plié de la première pièce. La tête de sertissage est munie d'un outil provoquant le rabat et l'application forcée du bord pré-plié de la première pièce contre le bord de la deuxième pièce. Selon des variantes habituelles de réalisation, l'outil est du type à galet ou du type à rampe de forme. The crimping operation is currently subdivided into two main stages: a first step, called pre-crimping, consists in bending at 90 ° an edge of a first part to orient it vertically relative to the general plane of the first part ; a second step, called crimping, consists of folding and applying the previously folded edge of the first piece to an edge of the second piece, to assemble said edges to one another and therefore the pieces one to the other. To operate the crimping step, the pieces are installed in an overlay on a die and a robot is commonly used to move a crimping head along the pre-folded edge of the first piece. The crimping head is provided with a tool causing the flap and forced application of the pre-folded edge of the first piece against the edge of the second piece. According to the usual embodiments, the tool is of the roller type or of the shape ramp type.
Dans le cas où l'outil équipant la tête de sertissage est du type à galet, le galet provoque progressivement le rabat puis l'application forcée du bord préplié de la première pièce contre le bord de la deuxième pièce. Plusieurs passes de la tête de sertissage le long du bord pré-plié de la première pièce sont alors nécessaires. Par exemple le document FR 2 990 887 (PEUGEOT CITROENIn the case where the tool equipping the crimping head is of the roller type, the roller gradually causes the flap then the forced application of the pre-folded edge of the first piece against the edge of the second piece. Several passes of the crimping head along the pre-folded edge of the first piece are then necessary. For example the document FR 2 990 887 (PEUGEOT CITROEN
AUTOMOBILES), décrit un tel procédé de sertissage mettant en œuvre un robot équipé d'une tête de sertissage à galet. Lors d'une première passe, un galet incliné à 45° par rapport au plan général des pièces superposées provoque le rabat à 45° du bord pré-plié de la première pièce vers le bord de la deuxième pièce. Lors d'une deuxième passe, le galet est alors orienté parallèlement au plan général des pièces superposées et provoque le rabat du bord pré-plié de la première pièce parallèlement au bord de la deuxième pièce. Lors d'une troisième passe, le galet provoque l'écrasement du bord pré-plié de la première pièce contre le bord de la deuxième pièce. AUTOMOBILES), describes such a crimping process using a robot equipped with a roller crimping head. In a first pass, a roller inclined at 45 ° to the general plane of the superposed parts causes the flap at 45 ° from the pre-folded edge of the first piece towards the edge of the second piece. In a second pass, the roller is then oriented parallel to the general plane of the superimposed parts and causes the flap of the pre-folded edge of the first piece parallel to the edge of the second piece. In a third pass, the roller causes crushing of the pre-folded edge of the first piece against the edge of the second piece.
Dans le cas où l'outil équipant la tête de sertissage est du type à rampe de forme, telle qu'agencée en vrille ou en hélice, la rampe de forme au cours d'une seule passe provoque progressivement le rabat et l'application forcée du bord pré-plié de la première pièce contre le bord de la deuxième pièce. On pourra à ce propos se reporter au document FR 2 990 887 précédemment cité et au document FR 3 008 331 (PEUGEOT CITROEN AUTOMOBILES). Pour maintenir les pièces l'une par rapport à l'autre au cours de l'opération de sertissage, différentes techniques de maintien des pièces l'une à l'autre sont appliquées. Par exemples et préalablement au sertissage, les pièces sont maintenues l'une à l'autre par collage, par points de soudure ou par poinçonnage, voire encore tel que proposé par le document FR2 988 311 (PEUGEOT CITROEN AUTOMOBILES), par matage au moyen d'une roulette striées placée à l'avant de la rampe de forme suivant son sens de déplacement le long du bord des pièces. De telles techniques de sertissage méritent d'être améliorées. En effet considérant les robots équipés d'une tête de sertissage à galet, la nécessité d'opérer plusieurs passes est contraignante. Considérant les robots équipés d'une tête de sertissage à rampe de forme, le sertissage obtenu en une seule passe est avantageux mais les frottements de la rampe de forme contre le bord de la première pièce sont importants et délétères. De tels frottements provoquent notamment l'altération d'un éventuel revêtement de protection de la tôle formant la première pièce, tel qu'un revêtement anticorrosion couramment à base de zinc. In the case where the tool equipping the crimping head is of the form ramp type, as arranged in a spin or a helix, the shape ramp during a single pass gradually causes the flap and the forced application. the pre-folded edge of the first piece against the edge of the second piece. In this regard, reference may be made to document FR 2 990 887 previously cited and to document FR 3 008 331 (PEUGEOT CITROEN AUTOMOBILES). To maintain the parts relative to each other during the crimping operation, different techniques for holding parts to each other are applied. For example and before crimping, the parts are held together by gluing, spot welding or punching, or even as proposed by the document FR2 988 311 (PEUGEOT CITROEN AUTOMOBILES), by matting means a ribbed wheel placed at the front of the shape ramp according to its direction of movement along the edge of the pieces. Such crimping techniques deserve to be improved. Indeed considering the robots equipped with a roller crimping head, the need to operate several passes is binding. Considering the robots equipped with a form-crimping crimping head, the crimping obtained in a single pass is advantageous, but the friction of the shape ramp against the edge of the first part is important and deleterious. Such friction causes in particular the alteration of any protective coating of the sheet forming the first part, such as an anticorrosion coating commonly based on zinc.
Dans ce contexte, il est utile de proposer une tête de sertissage munie d'un outil apte, en une seule passe, à plier et à appliquer en force le bord pré-plié d'une première pièce en tôle contre le bord d'une deuxième pièce en tôle, et cela en limitant les effets délétères induits par les frottements générés par l'application de l'outil le long du bord pré-plié de la première pièce. La présente invention s'inscrit dans une telle recherche et vise à proposer à cet effet un dispositif de sertissage comportant une tête de sertissage déplaçable par un robot le long des bords de pièces en tôle à assembler entre elles, notamment un panneau et la doublure d'un ouvrant de véhicule automobile, procurant en une seule passe le sertissage des pièces entre elles en évitant au mieux d'altérer la surface de la pièce soumise à frottements par application contre son bord d'un outil équipant la tête de sertissage. Une telle recherche s'inscrit dans un cadre constant de contraintes économiques rigoureuses dans le domaine de l'automobile, imposant notamment de réduire au mieux les coûts de production des véhicules automobiles. Ainsi, la recherche de la présente invention s'inscrit dans un cadre de contraintes potentiellement rédhibitoires au regard des avantages procurés et visant essentiellement : In this context, it is useful to propose a crimping head equipped with a suitable tool, in a single pass, to fold and forcefully apply the pre-folded edge of a first sheet metal part against the edge of a second sheet metal part, and this by limiting the deleterious effects induced by the friction generated by the application of the tool along the pre-folded edge of the first piece. The present invention is part of such a research and aims to propose for this purpose a crimping device comprising a crimping head movable by a robot along the edges of sheet metal parts to be assembled together, including a panel and the lining of an opening of a motor vehicle, providing in a single pass the crimping of the parts together avoiding at best to alter the surface of the part subjected to friction by application against its edge of a tool equipping the crimping head. Such research is part of a constant framework of rigorous economic constraints in the field of the automobile, imposing notably to reduce at best the production costs of the motor vehicles. Thus, the research of the present invention is part of a framework of potentially unacceptable constraints with regard to the benefits provided and essentially aimed at:
-) à simplifier au mieux la structure de la tête de sertissage et ses modalités de mise en œuvre,  -) to simplify as well as possible the structure of the crimping head and its methods of implementation,
-) à limiter et à rendre aisées autant que possible les opérations de maintenance de la tête de sertissage,  -) to limit and make as easy as possible the maintenance operations of the crimping head,
-) à accroître les cadences de production et par suite à procurer notamment le sertissage entre les pièces en adéquation avec les cadences imposées par la chaîne de production sur laquelle est installé le poste de sertissage des pièces entre elles,  -) to increase production rates and consequently to provide in particular crimping between parts in line with the rates imposed by the production line on which is installed the crimping station parts between them,
-) à éviter les opérations de reprise lors de la fabrication des éléments de carrosserie et notamment à éviter une opération de finition de surface des pièces assemblées entre elles par sertissage. -) to avoid the recovery operations during the manufacture of the body elements and in particular to avoid a surface finishing operation parts assembled together by crimping.
Le dispositif de sertissage entre deux pièces en tôle de la présente invention comprend : The crimping device between two sheet metal parts of the present invention comprises:
-) une matrice apte à soutenir les pièces en superposition dans leur plan général. Tel que classiquement, une telle matrice forme une enclume sur laquelle sont placées en superposition les pièces en tôle dont aux moins deux bords respectifs sont à sertir l'un à l'autre, ladite enclume coopérant avec un moyen de pressage desdits bords l'un contre l'autre procurant leur sertissage entre eux.  -) a matrix able to support the superimposed parts in their general plan. As conventionally, such a matrix forms an anvil on which are placed in superposition the sheet metal parts of which at least two respective edges are crimped to one another, said anvil cooperating with a means of pressing said edges one against the other providing their crimping between them.
-) une tête de sertissage montée sur un robot de déplacement de la tête de sertissage suivant une direction de déplacement le long d'une trajectoire de consigne. La tête de sertissage est munie d'un outil apte, en une seule passe lors du déplacement de la tête de sertissage par le robot suivant ladite direction de déplacement, à rabattre et à appliquer en force un bord d'une première pièce contre un bord d'une deuxième pièce. Typiquement dans un tel cas selon lequel le sertissage entre les bords des pièces est procuré en une seule passe de la tête de sertissage le long des bords des pièces suivant sa direction de déplacement, l'outil comporte une rampe de forme apte à rabattre progressivement par déformation le bord de la première pièce contre le bord de la deuxième pièce. -) a crimping head mounted on a robot for moving the crimping head in a direction of movement along a set path. The crimping head is provided with a suitable tool, in a single pass during the movement of the crimping head by the robot in said direction of displacement, to fold down and forcefully apply an edge of a first piece against an edge a second room. Typically in such a case in which the crimping between the edges of the parts is provided in a single pass of the crimping head along the edges of the parts along its direction of movement, the tool comprises a ramp of shape able to gradually fold back by deforming the edge of the first piece against the edge of the second piece.
Dans ce contexte, la démarche de la présente invention est fondée sur le constat qu'une telle rampe de forme applique des efforts de frottements par glissement constant contre le bord de la première pièce, depuis l'amorçage de son rabat vers le bord de la deuxième pièce jusqu'à l'effort de pressage opéré par l'outil procurant le sertissage entre les bords des pièces. Or, ledit effort de pressage, tel qu'habituellement opéré par la rampe de forme, est particulièrement délétère pour la surface du bord de la première pièce pressée par la rampe de forme. In this context, the approach of the present invention is based on the observation that such a shape ramp applies constant sliding friction forces against the edge of the first piece, from the initiation of its flap to the edge of the second piece up to the pressing force operated by the tool providing crimping between the edges of the pieces. Now, said pressing force, as usually operated by the shape ramp, is particularly deleterious for the surface of the edge of the first piece pressed by the shape ramp.
A partir de ce constat, la présente invention propose de dissocier les modalités d'application par l'outil des efforts procurant respectivement d'une part le rabat du bord de la première pièce sensiblement contre le bord de la deuxième pièce, et d'autre part le pressage du bord de la première pièce contre le bord de la deuxième pièce procurant leur sertissage l'un à l'autre. On the basis of this observation, the present invention proposes to dissociate the application modes by the tool of the efforts respectively providing on the one hand the flap of the edge of the first piece substantially against the edge of the second piece, and on the other hand by pressing the edge of the first piece against the edge of the second piece providing their crimping to one another.
A cet effet, le dispositif de sertissage de la présente invention tel que précédemment défini, est principalement reconnaissable en ce que l'outil comporte en outre au moins un galet apte à appliquer en force, contre le bord de la deuxième pièce, le bord de la première pièce préalablement rabattu par la rampe de forme sensiblement contre le bord de la deuxième pièce. La surface de roulement du galet est disposée, suivant la direction de déplacement de la tête de sertissage, à l'arrière de la rampe de forme en prolongement de son bord de fuite. Une échappée, au bord de fuite de la rampe de forme, du bord de la première pièce par suite de son rabat sensiblement contre le bord de la deuxième pièce, est suivie d'un pressage du bord de la première pièce par le galet. Si besoin de préciser pour un lecteur insuffisamment averti, le bord de fuite de la rampe de forme est bien évidemment compris comme étant le bord de la rampe de forme auquel s'échappe la zone du bord de la première pièce préalablement rabattue par la rampe de forme sensiblement contre le bord de la deuxième pièce, par suite du déplacement de la tête de sertissage par le robot suivant ladite direction de déplacement le long de sa trajectoire de consigne. For this purpose, the crimping device of the present invention as previously defined, is mainly recognizable in that the tool further comprises at least one roller capable of applying force, against the edge of the second piece, the edge of the first piece previously folded by the shaped ramp substantially against the edge of the second piece. The rolling surface of the roller is arranged, in the direction of movement of the crimping head, at the rear of the shape ramp in extension of its trailing edge. An escape at the trailing edge of the shape ramp from the edge of the first piece due to its flap substantially against the edge of the second piece is followed by pressing the edge of the first piece by the roller. If need be to specify for an insufficiently informed reader, the trailing edge of the shape ramp is obviously understood as being the edge of the shape ramp to which escapes the zone of the edge of the first piece previously folded by the ramp of form substantially against the edge of the second part, as a result of the movement of the crimping head by the robot in said direction of movement along its set path.
Selon une forme de réalisation, il est pris en considération la génératrice de la surface de roulement du galet située au plus proche de la matrice, dite génératrice de sertissage. Un écart est de préférence ménagé entre les distances de séparation par rapport à la matrice respectivement de la génératrice de sertissage et du bord de fuite de la rampe de forme, la génératrice de sertissage étant disposée plus proche de la matrice que le bord de fuite de la rampe de forme. According to one embodiment, the generatrix of the rolling surface of the roller located closest to the matrix, said crimping generator, is taken into consideration. A gap is preferably provided between the separation distances from the die respectively of the crimping generator and the trailing edge of the shape ramp, the crimping generator being arranged closer to the die than the trailing edge of the shape ramp.
Il est encore pris en considération la génératrice susvisée de la surface de roulement du galet située en au plus proche de la matrice, dite génératrice de sertissage, et cela isolément ou en combinaison avec les dispositions précédemment décrites. La face arrière de la rampe de forme comporte de préférence un dégagement de passage de la surface de roulement du galet, limitant la distance de séparation, suivant la direction de déplacement de la tête de sertissage, entre le bord de fuite de la rampe de forme et la génératrice de sertissage. De préférence, la génératrice définissant la surface de révolution du galet est orientée sensiblement parallèlement au bord de fuite de la rampe de forme. De préférence encore, l'axe de rotation du galet est orienté sensiblement parallèlement au bord de fuite de la rampe de forme, à une éventuelle inclinaison près du bord de fuite de la rampe de forme par rapport au plan général d'extension de la matrice. Bien entendu, les orientations respectives de l'axe de rotation du galet et de la génératrice définissant la surface de révolution du galet, sont susceptibles d'être adaptées selon l'agencement de la rampe de forme et de son bord de fuite notamment. En effet, pour appliquer de manière satisfaisante au moyen du galet l'effort de pressage du bord de la première pièce procurant le sertissage des pièces entre elles, la génératrice définissant la surface de révolution du galet est notamment essentiellement orientée parallèlement au plan général de la matrice. It is also taken into consideration the aforementioned generatrix of the rolling surface of the roller located closest to the matrix, said crimping generator, and this in isolation or in combination with the previously described provisions. The rear face of the shaped ramp preferably comprises a passage clearance of the rolling surface of the roller, limiting the separation distance, in the direction of movement of the crimping head, between the trailing edge of the shape ramp. and the crimping generator. Preferably, the generatrix defining the surface of revolution of the roller is oriented substantially parallel to the trailing edge of the shape ramp. More preferably, the axis of rotation of the roller is oriented substantially parallel to the trailing edge of the shape ramp, to a possible inclination near the trailing edge of the shape ramp relative to the general plane of extension of the die. . Of course, the respective orientations of the axis of rotation of the roller and the generator defining the surface of revolution of the roller, are adapted to the arrangement of the shape ramp and its trailing edge in particular. Indeed, to satisfactorily apply by means of the roller the pressing force of the edge of the first part providing the crimping of the parts together, the generatrix defining the surface of revolution of the roller is in particular substantially oriented parallel to the general plane of the matrix.
Selon une forme de réalisation, l'outil comporte un corps intégrant de fabrication la rampe de guidage. Le galet est alors potentiellement monté tournant sur le corps. Selon une variante, la rampe de forme et le galet sont individuellement montés sur la tête de sertissage. According to one embodiment, the tool comprises a body incorporating the manufacturing guide ramp. The roller is then potentially mounted rotating on the body. According to one variant, the shape ramp and the roller are individually mounted on the crimping head.
Il n'est pas à exclure malgré la complexification induite de la structure de la tête de sertissage, que l'outil peut comporter une pluralité de galets à axes de rotation parallèles. Lesdits galets en pluralité sont plus particulièrement placés successivement à l'arrière du bord de fuite de la rampe de forme suivant la direction de déplacement de la tête de sertissage, à distances respectives de la matrice en étant de plus en plus proches de la matrice suivant une direction opposée à la direction de déplacement de la tête de sertissage. Dans ce contexte, la pluralité de galets est apte à appliquer un pressage progressif du bord de la première pièce contre le bord de la deuxième pièce pour leur sertissage l'un à l'autre. La présente invention a aussi pour objet une méthode de sertissage entre deux pièces en tôle mettant en œuvre un dispositif de sertissage tel qu'il vient d'être décrit. It is not excluded, despite the complexification induced by the structure of the crimping head, that the tool may comprise a plurality of rollers with parallel axes of rotation. Said rollers in plurality are more particularly placed successively at the rear of the trailing edge of the shape ramp in the direction of movement of the crimping head, at respective distances from the die being closer and closer to the next die a direction opposite to the direction of movement of the crimping head. In this context, the plurality of rollers is able to apply a progressive pressing of the edge of the first piece against the edge of the second piece to crimp them to each other. The present invention also relates to a method of crimping between two sheet metal parts implementing a crimping device as just described.
Réalisées par suite du déplacement en une seule passe de la tête de sertissage par le robot suivant ladite direction de déplacement le long des bords des pièces en tôle, la méthode de la présente invention comprend essentiellement les opérations suivantes : -) rabattre au moyen de la rampe de forme le bord de la première pièce sensiblement contre le bord de la deuxième pièce, puis Realized by the single-pass movement of the crimping head by the robot along said direction of travel along the edges of the sheet metal parts, the method of the present invention essentially comprises the following operations: -) fold down the edge of the first piece by means of the shape ramp substantially against the edge of the second piece, then
-) presser au moyen du galet le bord de la première pièce préalablement rabattu par la rampe de forme sensiblement contre le bord de la deuxième pièce.  -) pressing by means of the roller the edge of the first piece previously folded by the ramp of shape substantially against the edge of the second piece.
Selon une application particulière de la méthode de la présente invention, une opération initiale est réalisée préalablement au rabat au moyen de la rampe de forme du bord de la première pièce sensiblement contre le bord de la deuxième pièce. Tel que classiquement, ladite opération initiale est une opération de pliage à 90° du bord de la première pièce par rapport au plan général de la première pièce. According to a particular application of the method of the present invention, an initial operation is carried out prior to the flap by means of the ramp shape of the edge of the first piece substantially against the edge of the second piece. As conventionally, said initial operation is a 90 ° folding operation of the edge of the first piece relative to the general plane of the first piece.
Dans ce cas, la rampe de forme comporte par exemple une surface de vnllage du bord de la première pièce agencée en hélice, de sorte que la rampe de forme applique un vrillage progressif à 90° du bord de la première pièce pour le placer en superposition contre le bord de la deuxième pièce, préalablement à leur sertissage l'un à l'autre au moyen du galet. In this case, the shape ramp comprises for example a surface of vnllage edge of the first part arranged helically, so that the shape ramp applies a progressive twisting at 90 ° from the edge of the first part to place it in superposition against the edge of the second piece, before crimping them to one another by means of the roller.
La présente invention, mettant en œuvre tels qu'ils viennent d'être décrits la méthode de sertissage au moyen du dispositif de sertissage, est notamment avantageusement applicable au sertissage entre les bords respectifs d'un panneau et d'une doublure constitutifs au moins en partie d'un ouvrant de véhicule automobile. On relèvera parmi les résultats techniques procurés par la présente invention les avantages suivants : The present invention, implementing as described above the crimping method by means of the crimping device, is particularly advantageously applicable to the crimping between the respective edges of a panel and a lining constituting at least part of an opening of a motor vehicle. Among the technical results provided by the present invention, the following advantages will be noted:
La mutualisation de la rampe de forme et du galet composant au moins en partie l'outil équipant la tête de sertissage de la présente invention, permet de diminuer les contraintes issues des frottements exercés par l'outil contre la première pièce lors du sertissage des pièces entre elles. En effet, les frottements par glissement traditionnellement opérés par la rampe de forme lors du sertissage des pièces sont optimums lors du pressage du bord de la première pièce. Un tel pressage étant selon la présente invention réalisé par le galet, le frottement par glissement traditionnellement opérés par la rampe de forme pour provoquer le sertissage des pièces entre elles, est remplacé par un frottement roulant opéré par le galet. Un tel frottement roulant a pour effet avantageux d'obtenir un pressage adéquat du bord de la première pièce lors du sertissage des pièces entre elles, tout en limitant les contraintes de surface issues du frottement de l'outil contre le bord de la première pièce. The pooling of the shape ramp and the roller component at least partly the tool equipping the crimping head of the present invention, reduces the stresses resulting from the friction exerted by the tool against the first part during crimping parts between them. Indeed, the sliding friction traditionally operated by the shape ramp during the crimping of the parts are optimal when pressing the edge of the first part. Such pressing being according to the present invention carried out by the roller, the sliding friction traditionally operated by the shape ramp to cause the crimping of the parts together, is replaced by a rolling friction operated by the roller. Such rolling friction has the advantageous effect of obtaining adequate pressing of the edge of the first part during crimping of the parts together, while limiting the surface stresses resulting from the friction of the tool against the edge of the first part.
Par suite, une usure de surface et/ou un écrouissage de la première pièce, voire encore un arrachement partiel d'un revêtement de protection des pièces, ainsi qu'une dégradation prématurée de la rampe de forme sont avantageusement évités. As a result, surface wear and / or work hardening of the first part, or even a partial tearing of a protective coating parts, and premature degradation of the shape ramp are advantageously avoided.
Il est à relever que de tels avantages sont procurés en obtenant un sertissage des pièces entre elles à partir d'une seule passe de la tête de sertissage le long des bords des pièces en tôle à sertir, avec pour avantage d'améliorer les cadences de production. Une telle amélioration des cadences de production est obtenue y compris au regard des cadences de production traditionnellement obtenues en exploitant un outil comportant uniquement une rampe de forme. It should be noted that such advantages are obtained by obtaining a crimping of the pieces together from a single pass of the crimping head along the edges of the sheet metal parts to crimp, with the advantage of improving the rates of production. Such an improvement in production rates is obtained also with regard to the production rates traditionally obtained by using a tool comprising only a shape ramp.
En effet, la vitesse de déplacement de la tête de sertissage le long de sa trajectoire de consigne est dépendante des efforts fournis par l'outil pour rabattre le bord de la première pièce puis en continuité pour sertir les pièces entre elles. Le pressage du bord de la première pièce visant à provoquer le sertissage des pièces entre elles étant opéré par le galet, la vitesse de déplacement de la tête de sertissage suivant sa trajectoire de consigne peut être accrue. En outre, l'état de surface des pièces dont les bords sont pressés l'un contre l'autre pour leur sertissage en est amélioré, avec pour avantage d'éviter une opération de finition de surface des pièces serties l'une à l'autre. Par ailleurs, les coûts induits par les opérations de maintenance de la tête de sertissage sont réduits au regard de ceux relevant de l'utilisation seule d'une rampe de forme pour rabattre le bord de la première pièce et opérer le sertissage des pièces entre elles. En effet en premier lieu la rampe de forme est préservée lors du pressage du bord de la première pièce procurant le sertissage des pièces entre elles, avec pour avantage de réduire son usure et donc d'espacer les opérations nécessaires à sa maintenance. En outre en deuxième lieu, un galet courant du commerce de structure simple peut être utilisé pour équiper l'outil. Un tel galet peut être de structure robuste permettant d'espacer les opérations pour sa maintenance. En outre, un tel galet, monté tournant sur la tête de sertissage par l'intermédiaire d'un axe de rotation d'orientation constante, est aisément accessible par un opérateur et peut être facilement et rapidement monté et/ou démonté pour son remplacement à moindres coûts. Indeed, the speed of movement of the crimping head along its set path is dependent on the forces provided by the tool to fold the edge of the first piece and then in continuity to crimp the parts together. The pressing of the edge of the first piece to cause the crimping of the parts between them being operated by the roller, the speed of movement of the crimping head along its target path can be increased. In addition, the surface condition of the parts whose edges are pressed against each other for their crimping is improved, with the advantage of avoiding a surface finishing operation parts crimped to each other. other. Moreover, the costs incurred by the maintenance operations of the crimping head are reduced compared with those involving the use of only a shaped ramp to fold the edge of the first part and crimp the parts together. . Indeed in the first place the shape ramp is preserved during the pressing of the edge of the first part providing the crimping of the parts together, with the advantage of reducing its wear and therefore to space the operations necessary for its maintenance. In addition, secondly, a single commercial running roller of simple structure can be used to equip the tool. Such a roller may be of robust structure to space operations for maintenance. In addition, such a roller, rotatably mounted on the crimping head via a rotation axis of constant orientation, is easily accessible by an operator and can be easily and quickly mounted and / or disassembled for its replacement at lower costs.
Un exemple de réalisation de la présente invention va être décrit en relation avec les figures de la planches annexée, dans laquelle les fig.1 , fig.2 et fig.3 sont des illustrations d'une tête de sertissage conforme à la présente invention, respectivement représentée en perspective, en vue de côté et en vue de face. An embodiment of the present invention will be described in connection with the figures of the attached plates, in which fig.1, fig.2 and fig.3 are illustrations of a crimping head according to the present invention, respectively represented in perspective, in side view and in front view.
Il faut tout d'abord noter que, pour clarifier et rendre aisée la lecture de la description qui va être faite de la présente invention, les organes communs représentés sur les différentes figures sont respectivement identifiés dans les descriptions propres à ces figures avec les mêmes numéros et/ou lettres de référence, sans impliquer leur représentation individuelle sur chacune des figures. Tel est notamment le cas des pièces à sertir entre elles représentées sur la fig.2 et la fig.3, et non représentées sur la fig.1 pour clarifier cette figure. Sur les figures, un dispositif de sertissage entre deux pièces 1 ,2 en tôles comprend essentiellement une tête de sertissage 3 déplaçable par un robot 4 et une matrice 5 de soutien en superposition des pièces 1 ,2 en position de sertissage, au moins à leurs bords à sertir entre eux. La tête de sertissage 3 est munie d'un outil 6 provoquant, par suite du déplacement de la tête de sertissage 3 par le robot 4 le long des bords des pièces 1 ,2 suivant une direction de déplacement DP donnée, le rabat du bord 7 d'une première pièce 1 vers le bord 8 d'une deuxième pièce 2. Puis, suite au rabat du bord 7 de la première pièce 1 , l'outil 6 réalise le sertissage des bords 7,8 des pièces 1 ,2 l'un à l'autre en exerçant une pression contre le bord 7 préalablement rabattu de la première pièce 1 contre le bord 8 de la deuxième pièce 2. It should first be noted that, to clarify and make it easy to read the description that will be made of the present invention, the common organs shown in the different figures are respectively identified in the descriptions of these figures with the same numbers. and / or letters of reference, without involving their individual representation on each of the figures. This is particularly the case of parts to be crimped together shown in Fig.2 and Fig.3, and not shown in Fig.1 to clarify this figure. In the figures, a crimping device between two pieces 1, 2 in sheets essentially comprises a crimping head 3 movable by a robot 4 and a support matrix 5 superimposed parts 1, 2 in crimping position, at least their crimped edges between them. The crimping head 3 is provided with a tool 6 causing, as a result of the movement of the crimping head 3 by the robot 4 along the edges of the parts 1, 2 in a given direction of displacement DP, the flap of the edge 7 from a first piece 1 to the edge 8 of a second piece 2. Then, following the flap of the edge 7 of the first piece 1, the tool 6 crimps the edges 7,8 parts 1, 2 the one to the other by exerting a pressure against the edge 7 previously folded of the first piece 1 against the edge 8 of the second piece 2.
L'outil 6 comprend d'une part une rampe de forme 9 provoquant le rabat du bord 7 de la première pièce 1 vers le bord 8 de la deuxième pièce 2, et d'autre part un galet 10 pressant le bord 7 de la première pièce 1 contre le bord 8 de la deuxième pièce 2 pour réaliser leur sertissage l'un à l'autre. Plus particulièrement, l'échappée du bord 7 rabattu de la première pièce 1 hors de la rampe de forme 9 à son bord de fuite 11 , est suivie d'un pressage par le galet 10 du bord 7 rabattu de la première pièce 1 contre le bord 8 de la deuxième pièce 2. The tool 6 comprises on the one hand a shape ramp 9 causing the flap of the edge 7 of the first piece 1 to the edge 8 of the second piece 2, and secondly a roller 10 pressing the edge 7 of the first piece 1 against the edge 8 of the second piece 2 to realize their crimping to one another. More particularly, the escapement of the flanged edge 7 of the first piece 1 out of the shape ramp 9 at its trailing edge 11, is followed by pressing by the roller 10 of the flanged edge 7 of the first piece 1 against the edge 8 of the second piece 2.
A cette fin et considérant la direction de déplacement DP de la tête de sertissage 3 par le robot 4, le galet 10 est placé à l'arrière du bord de fuite 11 de la rampe de forme 9, auquel bord de fuite 11 le bord 7 de la première pièce 1 s'échappe de la rampe de forme 9 par suite de son rabat par la rampe de forme 9 vers et sensiblement contre le bord 8 de la deuxième pièce 2. Plus spécifiquement, il est à considérer que la surface de roulement du galet 10 est disposée en prolongement de la surface de la rampe de forme 9 provoquant le rabat du bord 7 de la première pièce 1 sensiblement contre le bord 8 de la deuxième pièce 2. For this purpose and considering the direction of movement DP of the crimping head 3 by the robot 4, the roller 10 is placed behind the trailing edge 11 of the shape ramp 9, at which the trailing edge 11 of the edge 7 of the first part 1 escapes from the shape ramp 9 as a result of its flap by the shape of the ramp 9 towards and substantially against the edge 8 of the second part 2. More specifically, it should be considered that the rolling surface of the roller 10 is disposed in extension of the surface of the shaped ramp 9 causing the flap of the edge 7 of the first part 1 substantially against the edge 8 of the second part 2.
Sur l'exemple de réalisation illustré, le bord 7 de la première pièce 1 est tel que classiquement préalablement plié à 90° par rapport au plan général de la première pièce 1. Sur la fig.3 plus particulièrement, la rampe de forme 9 est dans ce cas conformée en hélice, en provoquant par vrillage le rabat du bord 7 de la première pièce 1 vers et sensiblement contre le bord 8 de la deuxième pièce 2, jusqu'à son échappée hors de la rampe de forme 9 à son bord de fuite 11. In the exemplary embodiment illustrated, the edge 7 of the first part 1 is as conventionally folded at 90 ° relative to the general plane of the first part 1. In FIG. 3 more particularly, the shape ramp 9 is in this case shaped like a helix, by twisting the flap of the edge 7 of the first piece 1 towards and substantially against the edge 8 of the second piece 2, until its escape from the form ramp 9 at its edge. leak 11.
Pour placer le galet 10 au plus proche du bord de fuite 11 de la rampe de forme 9, la face arrière 12 de la rampe de forme 9, la notion arrière étant considérée suivant la direction de déplacement de la tête de sertissage par le robot, comporte un dégagement 13 de passage de la surface de roulement du galet 10 orientée vers ladite face arrière, particulièrement visible sur la fig.2. To place the roller 10 as close as possible to the trailing edge 11 of the shape ramp 9, the rear face 12 of the shape ramp 9, the rear notion being considered in the direction of movement of the crimping head by the robot, has a clearance 13 for passage of the rolling surface of the roller 10 facing said rear face, particularly visible in FIG.
Il est alors à considérer la distances d1 de séparation, suivant la direction de déplacement DP de la tête de sertissage 9 par le robot 4, entre le bord de fuite 11 de la rampe de forme 9 et la génératrice, dite génératrice de sertissage G, de la surface de roulement du galet 10 située au plus proche de la matrice 5. Grâce au dégagement 13 ménagé à la face arrière 12 de la rampe de forme 9, la distance d1 peut être au mieux réduite pour placer dans les meilleures conditions possibles la surface de roulement du galet 10 en prolongement de la rampe de forme 9, et plus particulièrement en prolongement de la surface de la rampe de forme 9 provoquant le rabat du bord 7 de la première pièce 1 vers et sensiblement contre le bord 8 de la deuxième pièce 2. La génératrice de sertissage G est notamment orientée sensiblement parallèlement au bord de fuite 11 de la rampe de guidage 9. On relèvera, tel que notamment visible sur la fig.3, que l'orientation parallèle de la génératrice de sertissage G par rapport au bord de fuite 11 est à apprécier compte tenu d'une légère inclinaison B préférée du bord de fuite 11 par rapport au plan général P de la matrice 5, le bord de fuite 11 s'étendant transversalement par rapport à la direction de déplacement DP de la tête de sertissage 3. It is then to consider the distances d1 of separation, in the direction of displacement DP of the crimping head 9 by the robot 4, between the trailing edge 11 of the shape ramp 9 and the generatrix, said crimping generator G, of the rolling surface of the roller 10 located closest to the matrix 5. Thanks to the clearance 13 provided at the rear face 12 of the shape ramp 9, the distance d1 can be at best reduced to place in the best possible conditions the rolling surface of the roller 10 in extension of the shaped ramp 9, and more particularly in extension of the surface of the shaped ramp 9 causing the flap of the edge 7 of the first part 1 to and substantially against the edge 8 of the second room 2. The crimping generator G is in particular oriented substantially parallel to the trailing edge 11 of the guide ramp 9. It will be noted, as particularly visible in FIG. 3, that the parallel orientation of the crimping generator G with respect to the edge leakage 11 is to be appreciated in view of a slight inclination B preferred trailing edge 11 relative to the general plane P of the matrix 5, the trailing edge 11 extending transversely to the direction of movement DP of the crimping head 3.
Par ailleurs, un écart E est ménagé entre les distances d2,d3 séparant la matrice 5 respectivement de la génératrice de sertissage G et du bord de fuite 11 de la rampe de forme 9. En d'autres termes, la génératrice de sertissage G est placée plus proche de la matrice 5 que le bord de fuite 11 de la rampe de forme 9. Furthermore, a gap E is provided between the distances d2, d3 separating the matrix 5 respectively from the crimping generator G and the trailing edge 11 of the shape ramp 9. In other words, the crimping generator G is placed closer to the die 5 than the trailing edge 11 of the shape ramp 9.
Le montage de la rampe de forme 9 et du galet 10 sur la tête de sertissage 3 peut être avantageusement réalisé sans difficulté notable. Sur l'exemple de réalisation illustré, le galet 10 et la rampe de forme 9 sont individuellement montés sur la tête de sertissage 3. L'axe de rotation A du galet 10 est orienté sensiblement parallèlement au bord de fuite 11 de la rampe de forme 9, la notion de sensiblement parallèle étant à apprécier compte tenu de ladite inclinaison préférée par rapport au plan P de la matrice suivant, du bord de fuite 11 s'étendant transversalement à la direction de déplacement DP de la tête de sertissage 3 par le robot 4. The mounting of the shaped ramp 9 and the roller 10 on the crimping head 3 can be advantageously performed without significant difficulty. In the exemplary embodiment illustrated, the roller 10 and the shape ramp 9 are individually mounted on the crimping head 3. The axis of rotation A of the roller 10 is oriented substantially parallel to the trailing edge 11 of the shape ramp 9, the notion of substantially parallel being to be appreciated in view of said preferred inclination with respect to the plane P of the following matrix, of the trailing edge 11 extending transversely to the direction of movement DP of the crimping head 3 by the robot 4.

Claims

REVENDICATIONS
1. - Dispositif de sertissage entre deux pièces (1 ,2) en tôle, comprenant d'une part une matrice (5) apte à soutenir les pièces (1 ,2) en superposition dans leur plan général et d'autre part une tête de sertissage (3) montée sur un robot (4) de déplacement de la tête de sertissage (3) suivant une direction de déplacement (DP) le long d'une trajectoire de consigne, la tête de sertissage (3) étant munie d'un outil (6) apte, en une seule passe lors du déplacement de la tête de sertissage (3) par le robot (4) suivant ladite direction de déplacement (DP), à rabattre et à appliquer en force un bord (7) d'une première pièce (1 ) contre un bord (8) d'une deuxième pièce (2), l'outil (6) comportant une rampe de forme (9) apte à rabattre progressivement par déformation le bord (7) de la première pièce1. - crimping device between two parts (1, 2) made of sheet metal, comprising on the one hand a matrix (5) adapted to support the parts (1, 2) superimposed in their general plane and on the other hand a head crimping device (3) mounted on a robot (4) for moving the crimping head (3) in a direction of displacement (DP) along a set path, the crimping head (3) being provided with a tool (6) adapted, in a single pass during the movement of the crimping head (3) by the robot (4) in said direction of displacement (DP), to fold down and forcefully apply an edge (7) d a first piece (1) against an edge (8) of a second piece (2), the tool (6) having a shape ramp (9) able to gradually deform by folding the edge (7) of the first room
(1) contre le bord (8) de la deuxième pièce (2), caractérisé en ce que l'outil (6) comporte en outre au moins un galet (10) dont la surface de roulement est disposée, suivant la direction de déplacement (DP) de la tête de sertissage (3), à l'arrière de la rampe de forme (9) en prolongement de son bord de fuite (11), le galet (10) étant apte à appliquer en force, contre le bord (8) de la deuxième pièce(1) against the edge (8) of the second piece (2), characterized in that the tool (6) further comprises at least one roller (10) whose rolling surface is arranged, in the direction of displacement (DP) of the crimping head (3), at the rear of the form ramp (9) in extension of its trailing edge (11), the roller (10) being able to be applied in force, against the edge (8) of the second room
(2) , le bord (7) de la première pièce (1 ) préalablement rabattu par la rampe de forme (9) sensiblement contre le bord (8) de la deuxième pièce (2). (2), the edge (7) of the first piece (1) previously folded by the shape ramp (9) substantially against the edge (8) of the second piece (2).
2. - Dispositif de sertissage selon la revendication 1 , caractérisé en ce que, considérant la génératrice de la surface de roulement du galet (10) située au plus proche de la matrice (5), dite génératrice de sertissage (G), un écart (E) est ménagé entre les distances (d2,d3) de séparation par rapport à la matrice (5) respectivement de la génératrice de sertissage (G) et du bord de fuite (11 ) de la rampe de forme (9), la génératrice de sertissage (G) étant disposée plus proche de la matrice (5) que le bord de fuite (11 ) de la rampe de forme (9). 2. - crimping device according to claim 1, characterized in that, considering the generatrix of the rolling surface of the roller (10) located closest to the matrix (5), said crimping generator (G), a deviation (E) is provided between the separation distances (d2, d3) with respect to the matrix (5) respectively of the crimping generator (G) and the trailing edge (11) of the shape ramp (9), the crimping generator (G) being disposed closer to the die (5) than the trailing edge (11) of the shape ramp (9).
3. - Dispositif de sertissage selon l'une quelconque des revendications 1 et 2, caractérisé en ce que la face arrière (12) de la rampe de forme (9) comporte un dégagement (13) de passage de la surface de roulement du galet (10), limitant la distance (d1) de séparation, suivant la direction de déplacement (DP) de la tête de sertissage (3), entre le bord de fuite (11) de la rampe de forme (9) et la génératrice de la surface de roulement du galet (10) située au plus proche de la matrice (5), dite génératrice de sertissage (G). 3. - crimping device according to any one of claims 1 and 2, characterized in that the rear face (12) of the shaped ramp (9) comprises a clearance (13) for passage of the rolling surface of the roller (10), limiting the distance (d1) of separation, according to the direction of movement (DP) of the head crimping device (3) between the trailing edge (11) of the shape ramp (9) and the generatrix of the rolling surface of the roller (10) located closest to the matrix (5), said crimping generator (BOY WUT).
4.- Dispositif de sertissage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la génératrice définissant la surface de révolution du galet (10) est orientée sensiblement parallèlement au bord de fuite (11) de la rampe de forme (10). 4. Crimping device according to any one of claims 1 to 3, characterized in that the generatrix defining the surface of revolution of the roller (10) is oriented substantially parallel to the trailing edge (11) of the shape ramp ( 10).
5.- Dispositif de sertissage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'axe de rotation (A) du galet (10) est orienté sensiblement parallèlement au bord de fuite (11) de la rampe de forme (9). 5. Crimping device according to any one of claims 1 to 4, characterized in that the axis of rotation (A) of the roller (10) is oriented substantially parallel to the trailing edge (11) of the shape ramp (9).
6. - Dispositif de sertissage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'outil (6) comportant un corps intégrant de fabrication la rampe de forme (9), le galet (10) est monté tournant sur le corps. 6. - Crimping device according to any one of claims 1 to 5, characterized in that the tool (6) comprising a manufacturing integral body form ramp (9), the roller (10) is rotatably mounted on the body.
7. - Dispositif de sertissage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la rampe de forme (9) et le galet (10) sont individuellement montés sur la tête de sertissage (3). 7. - crimping device according to any one of claims 1 to 5, characterized in that the shape ramp (9) and the roller (10) are individually mounted on the crimping head (3).
8. - Méthode de sertissage entre deux pièces (1 ,2) en tôle mettant en œuvre un dispositif de sertissage selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la méthode comprend les opérations suivantes réalisées par suite du déplacement en une seule passe de la tête de sertissage (3) par le robot (4) suivant ladite direction de déplacement (DP) le long des bords (7,8) des pièces (1 ,2) en tôle : 8. - method of crimping between two parts (1, 2) sheet metal implementing a crimping device according to any one of claims 1 to 7, characterized in that the method comprises the following operations performed as a result of the displacement in a single pass of the crimping head (3) by the robot (4) in said direction of displacement (DP) along the edges (7, 8) of the pieces (1, 2) made of sheet metal:
-) rabattre au moyen de la rampe de forme (9) le bord (7) de la première pièce (8) sensiblement contre le bord (8) de la deuxième pièce (2), puis  -) fold down by means of the shape ramp (9) the edge (7) of the first piece (8) substantially against the edge (8) of the second piece (2), then
-) presser au moyen du galet (10) le bord (7) de la première pièce (1) préalablement rabattu par la rampe de forme (9) sensiblement contre le bord (8) de la deuxième pièce (2). -) pressing by means of the roller (10) the edge (7) of the first piece (1) previously folded by the shape ramp (9) substantially against the edge (8) of the second piece (2).
9. - Méthode de sertissage selon la revendication 8, le bord (7) de la première pièce (1) étant plié à 90° par rapport au plan général de la première pièce (1 ) préalablement au rabat par la rampe de forme (9) du bord (7) de la première pièce (1), caractérisé en ce que la rampe de forme (9) comporte une surface de vrillage du bord (7) de la première pièce (1 ) agencée en hélice. 9. - Crimping method according to claim 8, the edge (7) of the first piece (1) being bent at 90 ° relative to the general plane of the first piece (1) before the flap by the shape ramp (9). ) of the edge (7) of the first piece (1), characterized in that the shape ramp (9) comprises a twist surface of the edge (7) of the first piece (1) arranged helically.
10. - Application d'une méthode de sertissage selon l'une quelconque des revendications 8 et 9 mettant en œuvre un dispositif de sertissage selon l'une quelconque des revendications 1 à 7, au sertissage entre les bords respectifs d'un panneau et d'une doublure constitutifs au moins en partie d'un ouvrant de véhicule automobile. 10. - Application of a method of crimping according to any one of claims 8 and 9 implementing a crimping device according to any one of claims 1 to 7, crimping between the respective edges of a panel and d a lining constituting at least part of an opening of a motor vehicle.
PCT/FR2016/050538 2015-04-03 2016-03-09 Head for crimping between two metal sheets of an automotive body element, provided with a tool combining a shaping ramp and a roller WO2016156690A1 (en)

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FR1552930 2015-04-03
FR1552930A FR3034330B1 (en) 2015-04-03 2015-04-03 CRUSHING HEAD BETWEEN TWO SHEETS OF A CAR BODY MEMBER, PROVIDED WITH A TOOL ASSOCIATING A SHAPE RAMP AND A ROD.

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WO2022229526A1 (en) * 2021-04-29 2022-11-03 Psa Automobiles Sa Device for crimping edges of metal sheets, and associated crimping method

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FR3034330A1 (en) 2016-10-07

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