WO2017144791A1 - Blade and method for crimping metal sheets - Google Patents

Blade and method for crimping metal sheets Download PDF

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Publication number
WO2017144791A1
WO2017144791A1 PCT/FR2017/050173 FR2017050173W WO2017144791A1 WO 2017144791 A1 WO2017144791 A1 WO 2017144791A1 FR 2017050173 W FR2017050173 W FR 2017050173W WO 2017144791 A1 WO2017144791 A1 WO 2017144791A1
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WO
WIPO (PCT)
Prior art keywords
blade
edge
sheet
folding
contact surface
Prior art date
Application number
PCT/FR2017/050173
Other languages
French (fr)
Inventor
Jean Marie COQUET
Anthony NOIZET
Original Assignee
Psa Automobiles S.A.
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 S.A. filed Critical Psa Automobiles S.A.
Priority to EP17707603.1A priority Critical patent/EP3419774B1/en
Priority to ES17707603T priority patent/ES2767101T3/en
Publication of WO2017144791A1 publication Critical patent/WO2017144791A1/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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge

Definitions

  • the invention relates to the field of shaping and assembly of metal sheets, including motor vehicle body elements.
  • the published patent document FR 2 987 290 A1 discloses a crimping blade for crimping the edges of two sheet metal parts, said blade comprising a contact surface forming a crimping swivel allowing, during the displacement of the blade, to fold the edge of one of the two pieces on the edge of the other piece.
  • the blade has, moreover, the characteristic that it comprises at least two twisted contact surfaces, so as to have a greater modularity.
  • the forming method involving the blade according to this teaching is interesting in that it allows to achieve in one pass crimping two sheets. A prerequisite however is that the edge of one of the sheets is previously folded to about 90 °. This is usually obtained by a prior operation called “dropping" of folding down the edge or edges of a sheet by the displacement of one or more blades called “dropping".
  • the "dropping" and crimping of the edges therefore consist of at least two operations.
  • the invention aims to overcome at least one drawback of the state of the art mentioned above. More particularly, the object of the invention is to propose a solution for folding a sheet edge in order to be crimping or crimping which is economical.
  • the invention relates to a blade for folding an edge of a metal sheet, comprising a contact surface extending in a generally twisted profile and configured to fold and fold said edge on the sheet during a movement of said blade along said edge; remarkable in that the transverse profile of the contact surface has a variation of inclination along the whole of said surface which is between 120 ° and 180 °, preferably between 140 ° and 180 °, or between 20 ° and 60 ° °.
  • the transverse profile that is to say in a plane perpendicular to the working direction of the blade, the contact surface is preferably generally rectilinear.
  • the contact surface comprises an input zone and an output zone of the edge of the metal sheet, the inclination variation of the transverse profile being between said input and output zones.
  • the transverse profile is in a plane perpendicular to the working direction of the blade.
  • the blade extends predominantly in a main plane, the transverse profile of the output zone being substantially parallel to said plane.
  • the main plane is advantageously generally parallel to the main portion of the sheet when the blade is in operation.
  • the transverse profile of the entrance zone is inclined relative to the perpendicular to the main plane of the blade.
  • the transverse profile of the inlet zone is inclined towards the inside of the blade on a portion of the contact surface, called the bearing portion, which corresponds to more than 40%, preferably more than 50%, the length of said surface.
  • the length of the contact surface is defined according to the working direction of the blade.
  • the contact surface comprises a tilting portion of the edge, said portion being located directly after the support portion, in the direction of movement of the sheet relative to the blade, the transverse profile.
  • said tilting portion having an inclination variation greater than 60 °, preferably greater than 90 °.
  • the tilting portion extends over less than 30% of the length of the contact surface.
  • the length of the contact surface is defined according to the working direction of the blade.
  • the transverse profile of the entry zone is inclined outwards of the blade over the entire extent of the contact surface.
  • the invention also relates to a method of folding an edge of a metal sheet, comprising a step of moving a folding blade along said edge of the sheet, remarkable in that the blade conforms to the invention, and in that the edge forms, before folding by the blade, an angle ⁇ with the sheet which is between 120 ° and 180 ° preferably between 140 ° and 180 ° or between 20 ° and 60 ° and that the edge, after folding by the blade, is folded on the sheet.
  • the edge of the sheet is folded over an edge of another sheet, so as to perform crimping between said sheets.
  • the measures of the invention are interesting in that they make it possible to fold a sheet edge, especially in the context of a crimping operation with another sheet, in a single pass.
  • the edge of the sheet must not be "dropped" beforehand, that is to say, be bent at about 90 °. Thanks to the invention, the edge can be unfolded, little folded or strongly folded in particular during a stamping operation of shaping the rest of the sheet.
  • FIG. 1 is a perspective view of a crimping operation of two pieces of sheet metal by means of a folding blade, according to a first embodiment of the invention
  • FIG. 2 is a perspective view of a crimping operation of two pieces of sheet metal by means of a folding blade, according to a second embodiment of the invention
  • FIG. 3 is a perspective view of a crimping operation of two pieces of sheet metal by means of a folding blade, according to a third embodiment of the invention.
  • Figure 1 is a representation of a forming operation by folding and crimping two metal sheets by means of a folding blade, according to a first embodiment of the invention. More specifically, a first sheet 2 comprising a main portion 2 1 and an edge 2 2 previously folded at an angle a is disposed. The angle a is advantageously between 20 and 60 °, namely that the edge 2 2 in question is inclined towards the main portion 2 1 with respect to a plane perpendicular to said main portion and passing through the edge formed by the fold from the edge 2 2 .
  • a second sheet 4, comprising also a main portion 4 1 and 4 an edge 2, is arranged on the first plate so that the edge 4 of the second sheet 2 comes close to the edge formed by the edge 2 2 of the first sheet 2.
  • a folding blade 6 is moved along the edges 2 2 and 4 2 of the two sheets 2 and 4, by a guide device not shown and well known to those skilled in the art.
  • the blade 6 comprises a generally solid body 6 1 .
  • the latter comprises a contact surface 6 with the edge 2 2 2 of the first sheet 2 in order to bend and fold said edge against the edge 4 2 of the second sheet 4 with a view to crimping.
  • the contact surface 6 2 extends along an edge of the blade 6. It forms a curved surface substantially twisted in a direction generally parallel to the working direction of the blade shown by the arrow in said 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 blade 6 while undergoing a rotation corresponding to the folding and folding of the edge 2 2 .
  • the variation in inclination of the transverse profile of the contact surface 6 2 corresponds essentially to the angle of folding which must be applied to the edge 2 2 .
  • This angle corresponds essentially to the angle a.
  • This angle is advantageously between 20 ° and 60 °.
  • the edge 2 2 is not " fallen", that is to say folded by a specific operation of folding edge (s) by a generally vertical movement of a so-called blade fall.
  • the edge 2 2 can be shaped during a stamping operation of the sheet by a folding movement and / or folding.
  • FIG. 2 illustrates a shaping operation by crimping and crimping two metal sheets by means of a folding blade, according to a second embodiment of the invention.
  • the reference numbers of the first mode are used in this second mode to designate the same elements or the elements corresponding numbers, these numbers being however increased by 100 in order to distinguish the embodiments.
  • the two sheets 102 and 104 to be crimped are identical to those of FIG. 1, with the difference that the edge 102 2 of the first sheet 102 forms an angle ⁇ with the main portion 102 1 which is greater than 90 °, occurrence of the order of 140 °.
  • the edge 102 2 in question is inclined opposite the main portion 102 1 relative to the perpendicular to said main portion 102 1 passing through the edge formed by the folding of said edge 102 2 .
  • the folding blade 106 is similar to that of FIG. 1, with the difference that the contact surface 106 2 forms a more pronounced tendril. More particularly, the cross section of the surface 106 2 has a greater inclination variation given that it is configured to fold the edge 102 2 at an angle substantially corresponding to that of the angle ⁇ , c ' that is, of the order of 140 °. It is interesting to note that the contact surface 106 2 comprises a support portion extending from the entry zone of the edge 102 2 . This portion is inclined inwardly of the blade over its entire length so as to serve as support for the blade. It can extend over more than 40% or even 50% of the length of the contact surface. In general, the length of the surface is considered along the longitudinal axis of the blade, this axis corresponding to the working direction represented by the arrow on the blade.
  • the contact surface 106 2 also includes a tilting portion located directly after the support portion, in the direction of relative movement of the sheet edge relative to the blade.
  • This tilting portion has an inclination variation which is advantageously greater than 60 °, more preferably greater than 90 °.
  • the cross section of this portion, at its entrance, is inclined towards the inside of the blade, while the cross section at its outlet is inclined towards the outside of the blade.
  • This portion has the function of tilting the edge 102 2 to the main portion 102 1 of the first sheet 102. This portion may extend over a length that is less than 30% of the total length of the contact surface.
  • the contact surface 106 2 may also include a so-called crimping portion, corresponding to the third and last portion. This crimping portion gradually presses the edge 102 2 , previously folded by the tilting portion, against the edge 104 2 of the second sheet, for crimping the edges in question.
  • the support portion described above makes it possible to stabilize the blade during its movement along the sheets. Indeed, in the configuration of the edge 102 2 of Figure 2, the angle of folding and folding of said edge is important and generates significant effort. These efforts result in an important component directed upwards.
  • the support portion allows to take some of these efforts.
  • FIG. 3 illustrates an operation of shaping by crimping and crimping two metal sheets by means of a folding blade, according to a third embodiment of the invention.
  • the reference numbers of the first mode are used in this second mode to designate the same elements or the corresponding elements, these numbers however being increased by 200 in order to distinguish the embodiments.
  • the folding operation illustrated in FIG. 3 is very similar to that of FIG. 2, with only differences that the angle formed by the edge 202 2 and the main portion 202 1 of the first sheet 202 is larger, in this case of the order of 170 °, and that the contact surface 206 2 has an even more pronounced tendril, according to the angle of folding of the edge 202 2 to achieve.

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

Abstract

The invention concerns a blade (106) for folding an edge (1022) of a metal sheet (102), comprising a contact surface (1062) extending along a generally twisted profile and configured to fold and collapse said edge (1022) onto the metal sheet (102) when said blade (106) moves along said edge (1022). The inclination of the transverse profile of the contact surface (1062) varies along the entirety of said surface, between 120° and 180° or between 20° and 60°. The invention also concerns a method for folding an edge (1022) of a metal sheet (102) using such a folding blade (106), in particular for the purpose of crimping with another metal sheet (104).

Description

LAME ET PROCEDE DE SERTISSAGE DE TOLES  BLADE AND METHOD OF CRIMPING SHEETS
L'invention a trait au domaine de la mise à forme et l'assemblage de tôles métalliques, notamment d'éléments de carrosserie de véhicule automobile. The invention relates to the field of shaping and assembly of metal sheets, including motor vehicle body elements.
Le document de brevet publié FR 2 987 290 A1 divulgue une lame de sertissage destinée à sertir les bords de deux pièces en tôle, ladite lame comprenant une surface de contact formant une vrille de sertissage permettant, lors du déplacement de la lame, de replier le bord de l'une des deux pièces sur le bord de l'autre pièce. La lame présente, en outre, la caractéristique qu'elle comprend au moins deux surfaces de contact vrillées, de manière à présenter une plus grande modularité. Le procédé de mise à forme impliquant la lame selon cet enseignement est intéressant en ce qu'il permet de réaliser en une seule passe un sertissage de deux tôles. Un prérequis est cependant que le bord d'une des tôles soit préalablement plié à environ 90°. Cela est habituellement obtenu par une opération préalable dite de « tombage » consistant à rabattre vers le bas le ou les bords d'une tôle par le déplacement d'une ou plusieurs lames dites de « tombage ». Le « tombage » et le sertissage des bords consistent par conséquent au minimum en deux opérations. The published patent document FR 2 987 290 A1 discloses a crimping blade for crimping the edges of two sheet metal parts, said blade comprising a contact surface forming a crimping swivel allowing, during the displacement of the blade, to fold the edge of one of the two pieces on the edge of the other piece. The blade has, moreover, the characteristic that it comprises at least two twisted contact surfaces, so as to have a greater modularity. The forming method involving the blade according to this teaching is interesting in that it allows to achieve in one pass crimping two sheets. A prerequisite however is that the edge of one of the sheets is previously folded to about 90 °. This is usually obtained by a prior operation called "dropping" of folding down the edge or edges of a sheet by the displacement of one or more blades called "dropping". The "dropping" and crimping of the edges therefore consist of at least two operations.
Il est cependant souhaitable de diminuer le nombre d'opérations de mise à forme en vue d'en diminuer le coût et le temps de production qui en résulte. However, it is desirable to reduce the number of formatting operations to reduce the cost and resulting production time.
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 proposer une solution pour le pliage d'un bord de tôle en vue d'un rabattement ou d'un sertissage qui soit économique. The invention aims to overcome at least one drawback of the state of the art mentioned above. More particularly, the object of the invention is to propose a solution for folding a sheet edge in order to be crimping or crimping which is economical.
L'invention a pour objet une lame de pliage d'un bord d'une tôle métallique, comprenant une surface de contact s'étendant suivant un profil généralement vrillé et configurée pour plier et rabattre ledit bord sur la tôle lors d'un déplacement de ladite lame le long dudit bord ; remarquable en ce que le profil transversal de la surface de contact présente une variation d'inclinaison le long de la totalité de ladite surface qui est compris entre 120° et 180°, préférentiellement entre 140° et 180°, ou entre 20° et 60°. Le profil transversal, c'est-à-dire dans un plan perpendiculaire à la direction de travail de la lame, de la surface de contact est avantageusement généralement rectiligne. The invention relates to a blade for folding an edge of a metal sheet, comprising a contact surface extending in a generally twisted profile and configured to fold and fold said edge on the sheet during a movement of said blade along said edge; remarkable in that the transverse profile of the contact surface has a variation of inclination along the whole of said surface which is between 120 ° and 180 °, preferably between 140 ° and 180 °, or between 20 ° and 60 ° °. The transverse profile, that is to say in a plane perpendicular to the working direction of the blade, the contact surface is preferably generally rectilinear.
Selon un mode avantageux de l'invention, la surface de contact comprend une zone d'entrée et une zone de sortie du bord de la tôle, la variation d'inclinaison du profil transversal étant entre lesdites zones d'entrée et de sortie. Le profil transversal s'entend dans un plan perpendiculaire à la direction de travail de la lame. According to an advantageous embodiment of the invention, the contact surface comprises an input zone and an output zone of the edge of the metal sheet, the inclination variation of the transverse profile being between said input and output zones. The transverse profile is in a plane perpendicular to the working direction of the blade.
Selon un mode avantageux de l'invention, la lame s'étend majoritairement dans un plan principal, le profil transversal de la zone de sortie étant essentiellement parallèle audit plan. Le plan principal est avantageusement généralement parallèle à la portion principale de la tôle lorsque la lame est en opération. According to an advantageous embodiment of the invention, the blade extends predominantly in a main plane, the transverse profile of the output zone being substantially parallel to said plane. The main plane is advantageously generally parallel to the main portion of the sheet when the blade is in operation.
Selon un mode avantageux de l'invention, le profil transversal de la zone d'entrée est incliné par rapport à la perpendiculaire au plan principal de la lame. According to an advantageous embodiment of the invention, the transverse profile of the entrance zone is inclined relative to the perpendicular to the main plane of the blade.
Selon un mode avantageux de l'invention, le profil transversal de la zone d'entrée est incliné vers l'intérieur de la lame sur une portion de la surface de contact, dite portion d'appui, qui correspond à plus de 40%, préférentiellement plus de 50%, de la longueur de ladite surface. La longueur de la surface de contact s'entend suivant la direction de travail de la lame. According to an advantageous embodiment of the invention, the transverse profile of the inlet zone is inclined towards the inside of the blade on a portion of the contact surface, called the bearing portion, which corresponds to more than 40%, preferably more than 50%, the length of said surface. The length of the contact surface is defined according to the working direction of the blade.
Selon un mode avantageux de l'invention, la surface de contact comprend une portion de basculement du bord, ladite portion étant située directement après la portion d'appui, dans le sens de déplacement de la tôle par rapport à la lame, le profil transversal de ladite portion de basculement présentant une variation d'inclinaison supérieure à 60°, préférentiellement supérieure à 90°. According to an advantageous embodiment of the invention, the contact surface comprises a tilting portion of the edge, said portion being located directly after the support portion, in the direction of movement of the sheet relative to the blade, the transverse profile. said tilting portion having an inclination variation greater than 60 °, preferably greater than 90 °.
Selon un mode avantageux de l'invention, la portion de basculement s'étend sur moins de 30% de la longueur de la surface de contact. La longueur de la surface de contact s'entend suivant la direction de travail de la lame. According to an advantageous embodiment of the invention, the tilting portion extends over less than 30% of the length of the contact surface. The length of the contact surface is defined according to the working direction of the blade.
Selon un mode avantageux de l'invention, le profil transversal de la zone d'entrée est incliné vers l'extérieur de la lame sur la totalité de l'étendue de la surface de contact. L'invention a également pour objet un procédé de pliage d'un bord d'une tôle métallique, comprenant une étape de déplacement d'une lame de pliage le long dudit bord de la tôle, remarquable en ce que la lame est conforme à l'invention, et en ce que le bord forme, avant le pliage par la lame, un angle a avec la tôle qui est compris entre 120° et 180° préférentiellement entre 140° et 180° ou entre 20° et 60° et ce que le bord, après le pliage par la lame, est rabattu sur la tôle. According to an advantageous embodiment of the invention, the transverse profile of the entry zone is inclined outwards of the blade over the entire extent of the contact surface. The invention also relates to a method of folding an edge of a metal sheet, comprising a step of moving a folding blade along said edge of the sheet, remarkable in that the blade conforms to the invention, and in that the edge forms, before folding by the blade, an angle α with the sheet which is between 120 ° and 180 ° preferably between 140 ° and 180 ° or between 20 ° and 60 ° and that the edge, after folding by the blade, is folded on the sheet.
Selon un mode avantageux de l'invention, lors du pliage par la lame, le bord de la tôle est rabattu sur un bord d'une autre tôle, de manière à réaliser un sertissage entre lesdites tôles. According to an advantageous embodiment of the invention, during folding by the blade, the edge of the sheet is folded over an edge of another sheet, so as to perform crimping between said sheets.
Les mesures de l'invention sont intéressantes en ce qu'elles permettent de plier un bord de tôle, notamment dans le cadre d'une opération de sertissage avec une autre tôle, en une seule passe. Le bord de la tôle ne doit pas être préalablement « tombé », c'est-à-dire être plié à environ 90°. Grâce à l'invention, le bord peut être non plié, peu plié ou fortement plié notamment lors d'une opération d'emboutissage de mise à forme du reste de la tôle. The measures of the invention are interesting in that they make it possible to fold a sheet edge, especially in the context of a crimping operation with another sheet, in a single pass. The edge of the sheet must not be "dropped" beforehand, that is to say, be bent at about 90 °. Thanks to the invention, the edge can be unfolded, little folded or strongly folded in particular during a stamping operation of shaping the rest of the sheet.
D'autres caractéristiques et avantages de la présente invention seront mieux compris à l'aide de la description et des dessins parmi lesquels. Other features and advantages of the present invention will be better understood from the description and the drawings among which.
- La figure 1 est une vue en perspective d'une opération de sertissage de deux pièces en tôle métallique au moyen d'une lame de pliage, conformément à un première mode de réalisation de l'invention ; - Figure 1 is a perspective view of a crimping operation of two pieces of sheet metal by means of a folding blade, according to a first embodiment of the invention;
- La figure 2 est une vue en perspective d'une opération de sertissage de deux pièces en tôle métallique au moyen d'une lame de pliage, conformément à un deuxième mode de réalisation de l'invention ; - Figure 2 is a perspective view of a crimping operation of two pieces of sheet metal by means of a folding blade, according to a second embodiment of the invention;
- La figure 3 est une vue en perspective d'une opération de sertissage de deux pièces en tôle métallique au moyen d'une lame de pliage, conformément à un troisième mode de réalisation de l'invention. - Figure 3 is a perspective view of a crimping operation of two pieces of sheet metal by means of a folding blade, according to a third embodiment of the invention.
La figure 1 est une représentation d'une opération de mise à forme par pliage et sertissage de deux tôles métalliques au moyen d'une lame de pliage, conformément à un premier mode de réalisation de l'invention. Plus précisément, une première tôle 2 comprenant une portion principale 21 et un bord 22 préalablement plié à un angle a est disposée. L'angle a est avantageusement compris entre 20 et 60°, à savoir que le bord 22 en question est incliné vers la portion principale 21 par rapport à un plan perpendiculaire à ladite portion principale et passant par l'arête formée par le pli du bord 22. Une deuxième tôle 4, comprenant elle aussi une portion principale 41 et un bord 42, est disposée sur la première tôle de manière à ce que le bord 42 de la deuxième tôle vienne à proximité de l'arête formée par le bord 22 de la première tôle 2. Figure 1 is a representation of a forming operation by folding and crimping two metal sheets by means of a folding blade, according to a first embodiment of the invention. More specifically, a first sheet 2 comprising a main portion 2 1 and an edge 2 2 previously folded at an angle a is disposed. The angle a is advantageously between 20 and 60 °, namely that the edge 2 2 in question is inclined towards the main portion 2 1 with respect to a plane perpendicular to said main portion and passing through the edge formed by the fold from the edge 2 2 . A second sheet 4, comprising also a main portion 4 1 and 4 an edge 2, is arranged on the first plate so that the edge 4 of the second sheet 2 comes close to the edge formed by the edge 2 2 of the first sheet 2.
Une lame de pliage 6 est déplacée le long des bords 22 et 42 des deux tôles 2 et 4, par un dispositif de guidage non représenté et bien connu en soi de l'homme de métier. La lame 6 comprend un corps généralement massif 61. Ce dernier comprend une surface de contact 62 avec le bord 22 de la première tôle 2 en vue de plier et rabattre ledit bord contre le bord 42 de la deuxième tôle 4 en vue de leur sertissage. La surface de contact 62 s'étend le long d'un bord de la lame 6. Elle forme une surface gauche vrillée essentiellement suivant une direction généralement parallèle à la direction de travail de la lame représentée par la flèche sur ladite 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 6 en subissant une rotation correspondant au pliage et rabattement du bord 22. La variation d'inclinaison du profil transversal de la surface de contact 62, depuis la zone d'entrée jusqu'à la zone de sortie, correspond essentiellement à l'angle de rabattement qui doit être appliqué au bord 22. Cet angle correspond essentiellement à l'angle a. Cet angle est avantageusement compris entre 20° et 60°. Le bord 22 n'est ainsi pas « tombé », c'est-à-dire plié par une opération spécifique de pliage de bord(s) par un mouvement généralement vertical d'une lame dite de tombage. A l'inverse, le bord 22 peut être mis à forme lors d'une opération d'emboutissage de la tôle par un mouvement de pliage et/ou de rabattement. A folding blade 6 is moved along the edges 2 2 and 4 2 of the two sheets 2 and 4, by a guide device not shown and well known to those skilled in the art. The blade 6 comprises a generally solid body 6 1 . The latter comprises a contact surface 6 with the edge 2 2 2 of the first sheet 2 in order to bend and fold said edge against the edge 4 2 of the second sheet 4 with a view to crimping. The contact surface 6 2 extends along an edge of the blade 6. It forms a curved surface substantially twisted in a direction generally parallel to the working direction of the blade shown by the arrow in said 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 blade 6 while undergoing a rotation corresponding to the folding and folding of the edge 2 2 . The variation in inclination of the transverse profile of the contact surface 6 2 , from the entry zone to the exit zone, corresponds essentially to the angle of folding which must be applied to the edge 2 2 . This angle corresponds essentially to the angle a. This angle is advantageously between 20 ° and 60 °. The edge 2 2 is not "fallen", that is to say folded by a specific operation of folding edge (s) by a generally vertical movement of a so-called blade fall. Conversely, the edge 2 2 can be shaped during a stamping operation of the sheet by a folding movement and / or folding.
La figure 2 illustre une opération de mise à forme par pliage et sertissage de deux tôles métalliques au moyen d'une lame de pliage, conformément à un deuxième mode de réalisation de l'invention. Les numéros de référence du premier mode sont utilisés dans ce deuxième mode pour désigner les mêmes éléments ou les éléments correspondants, ces numéros étant toutefois majorés de 100 afin des fins de distinction des modes de réalisation. FIG. 2 illustrates a shaping operation by crimping and crimping two metal sheets by means of a folding blade, according to a second embodiment of the invention. The reference numbers of the first mode are used in this second mode to designate the same elements or the elements corresponding numbers, these numbers being however increased by 100 in order to distinguish the embodiments.
Les deux tôles 102 et 104 à sertir sont identiques à celles de la figure 1 , à cette différence près que le bord 1022 de la première tôle 102 forme un angle a avec la portion principale 1021 qui est supérieur à 90°, en l'occurrence de l'ordre de 140°. Le bord 1022 en question est incliné à l'opposé de la portion principale 1021 par rapport à la perpendiculaire à la dite portion principale 1021 passant par l'arête formée par le pliage dudit bord 1022. The two sheets 102 and 104 to be crimped are identical to those of FIG. 1, with the difference that the edge 102 2 of the first sheet 102 forms an angle α with the main portion 102 1 which is greater than 90 °, occurrence of the order of 140 °. The edge 102 2 in question is inclined opposite the main portion 102 1 relative to the perpendicular to said main portion 102 1 passing through the edge formed by the folding of said edge 102 2 .
La lame de pliage 106 est similaire à celle de la figure 1 , avec toutefois pour différence que la surface de contact 1062 forme une vrille plus prononcée. Plus particulièrement, la section transversale de la surface 1062 présente une variation d'inclinaison plus importante compte tenu qu'elle est configurée pour rabattre le bord 1022 sur une valeur d'angle correspondant essentiellement à celle de l'angle a, c'est- à-dire de l'ordre de 140°. II est intéressant de noter que la surface de contact 1062 comprend une portion d'appui s'étendant depuis la zone d'entrée du bord 1022. Cette portion est inclinée vers l'intérieur de la lame sur toute sa longueur de manière à servir d'appui pour la lame. Elle peut s'étendre sur plus de 40%, voire 50%, de la longueur de la surface de contact. De manière générale, la longueur de la surface est considérée suivant l'axe longitudinal de la lame, cet axe correspondant à la direction de travail représentée par la flèche sur la lame. The folding blade 106 is similar to that of FIG. 1, with the difference that the contact surface 106 2 forms a more pronounced tendril. More particularly, the cross section of the surface 106 2 has a greater inclination variation given that it is configured to fold the edge 102 2 at an angle substantially corresponding to that of the angle α, c ' that is, of the order of 140 °. It is interesting to note that the contact surface 106 2 comprises a support portion extending from the entry zone of the edge 102 2 . This portion is inclined inwardly of the blade over its entire length so as to serve as support for the blade. It can extend over more than 40% or even 50% of the length of the contact surface. In general, the length of the surface is considered along the longitudinal axis of the blade, this axis corresponding to the working direction represented by the arrow on the blade.
La surface de contact 1062 comprend également une portion de basculement située directement après la portion d'appui, suivant la direction de déplacement relatif du bord de tôle par rapport à la lame. Cette portion de basculement présente une variation d'inclinaison qui est avantageusement supérieure à 60 °, plus avantageusement supérieure à 90°. La section transversale de cette portion, à son entrée, est inclinée vers l'intérieur de la lame, alors que la section transversale à sa sortie est inclinée vers l'extérieur de la lame. Cette portion a pour fonction de faire basculer le bord 1022 vers la portion principale 1021 de la première tôle 102. Cette portion peut s'étendre sur une longueur qui est inférieure à 30% de la longueur totale de la surface de contact. La surface de contact 1062 peut également comprendre une portion dite de sertissage, correspondant à la troisième et dernière portion. Cette portion de sertissage presse progressivement le bord 1022, préalablement rabattu par la portion de basculement, contre le bord 1042 de la deuxième tôle, en vue du sertissage des bords en question. The contact surface 106 2 also includes a tilting portion located directly after the support portion, in the direction of relative movement of the sheet edge relative to the blade. This tilting portion has an inclination variation which is advantageously greater than 60 °, more preferably greater than 90 °. The cross section of this portion, at its entrance, is inclined towards the inside of the blade, while the cross section at its outlet is inclined towards the outside of the blade. This portion has the function of tilting the edge 102 2 to the main portion 102 1 of the first sheet 102. This portion may extend over a length that is less than 30% of the total length of the contact surface. The contact surface 106 2 may also include a so-called crimping portion, corresponding to the third and last portion. This crimping portion gradually presses the edge 102 2 , previously folded by the tilting portion, against the edge 104 2 of the second sheet, for crimping the edges in question.
La portion d'appui décrite ci-avant permet de stabiliser la lame lors de son déplacement le long des tôles. En effet, dans la configuration du bord 1022 de la figure 2, l'angle de pliage et de rabattement dudit bord est important et génère des efforts importants. Ces efforts résultent en une composante importante dirigée vers le haut. La portion d'appui permet de reprendre une partie de ces efforts. The support portion described above makes it possible to stabilize the blade during its movement along the sheets. Indeed, in the configuration of the edge 102 2 of Figure 2, the angle of folding and folding of said edge is important and generates significant effort. These efforts result in an important component directed upwards. The support portion allows to take some of these efforts.
La figure 3 illustre une opération de mise à forme par pliage et sertissage de deux tôles métalliques au moyen d'une lame de pliage, conformément à un troisième mode de réalisation de l'invention. Les numéros de référence du premier mode sont utilisés dans ce deuxième mode pour désigner les mêmes éléments ou les éléments correspondants, ces numéros étant toutefois majorés de 200 afin des fins de distinction des modes de réalisation. FIG. 3 illustrates an operation of shaping by crimping and crimping two metal sheets by means of a folding blade, according to a third embodiment of the invention. The reference numbers of the first mode are used in this second mode to designate the same elements or the corresponding elements, these numbers however being increased by 200 in order to distinguish the embodiments.
L'opération de pliage illustrée à la figure 3 est très similaire à celle de la figure 2, avec pour seules différences que l'angle a formé par le bord 2022 et la portion principale 2021 de la première tôle 202 est plus grand, en l'occurrence de l'ordre de 170°, et que la surface de contact 2062 présente une vrille encore plus prononcée, conformément à l'angle de rabattement du bord 2022 à réaliser. The folding operation illustrated in FIG. 3 is very similar to that of FIG. 2, with only differences that the angle formed by the edge 202 2 and the main portion 202 1 of the first sheet 202 is larger, in this case of the order of 170 °, and that the contact surface 206 2 has an even more pronounced tendril, according to the angle of folding of the edge 202 2 to achieve.

Claims

REVENDICATIONS
1 . Lame (6 ; 106 ; 206) de pliage d'un bord (22 ; 1022 ; 2022) d'une tôle métallique (2 ; 102 ; 202), comprenant une surface de contact (62 ; 1062 ; 2062) s'étendant suivant un profil généralement vrillé et configurée pour plier et rabattre ledit bord (22 ; 1022 ; 2022) sur la tôle (2 ; 102 ; 202) lors d'un déplacement de ladite lame (6 ; 106 ; 206) le long dudit bord (22 ; 1022 ; 2022) ; 1. Blade (6; 106; 206) for folding an edge (2 2 ; 102 2 ; 202 2 ) of a metal sheet (2; 102; 202), comprising a contact surface (6 2 ; 106 2 ; 206 2 ) extending in a generally twisted profile and configured to fold and fold said edge (2 2 ; 102 2 ; 202 2 ) onto the sheet (2; 102; 202) upon movement of said blade (6; 206) along said edge (2 2 ; 102 2 ; 202 2 );
caractérisée en ce que  characterized in that
le profil transversal de la surface de contact (62 ; 1062 ; 2062) présente une variation d'inclinaison le long de la totalité de ladite surface qui est compris entre 120 ° et 180 ° ou entre 20 ° et 60 °. the transverse profile of the contact surface (6 2 ; 106 2 ; 206 2 ) has a variation of inclination along the whole of said surface which is between 120 ° and 180 ° or between 20 ° and 60 °.
2. Lame (6 ; 106 ; 206) selon la revendication 1 , caractérisée en ce que la surface de contact (62 ; 1062 ; 2062) comprend une zone d'entrée et une zone de sortie du bord de la tôle, la variation d'inclinaison du profil transversal étant entre lesdites zones d'entrée et de sortie. 2. Blade (6; 106; 206) according to claim 1, characterized in that the contact surface (6 2 ; 106 2 ; 206 2 ) comprises an inlet zone and an outlet zone of the edge of the sheet, the inclination variation of the transverse profile being between said input and output areas.
3. Lame (6 ; 106 ; 206) selon la revendication 2, caractérisée en ce que la lame s'étend majoritairement dans un plan principal, le profil transversal de la zone de sortie étant essentiellement parallèle audit plan. 3. Blade (6; 106; 206) according to claim 2, characterized in that the blade extends predominantly in a main plane, the transverse profile of the outlet zone being substantially parallel to said plane.
4. Lame (6 ; 106 ; 206) selon la revendication 3, caractérisée en ce que le profil transversal de la zone d'entrée est incliné par rapport à la perpendiculaire au plan principal de la lame. 4. Blade (6; 106; 206) according to claim 3, characterized in that the transverse profile of the inlet zone is inclined relative to the perpendicular to the main plane of the blade.
5. Lame (106 ; 206) selon l'une des revendications 3 et 4, caractérisée en ce que le profil transversal de la zone d'entrée est incliné vers l'intérieur de la lame sur une portion de la surface de contact, dite portion d'appui, qui correspond à plus de 40%, préférentiellement plus de 50%, de la longueur de ladite surface. 5. Blade (106; 206) according to one of claims 3 and 4, characterized in that the transverse profile of the inlet zone is inclined towards the inside of the blade on a portion of the contact surface, so-called supporting portion, which corresponds to more than 40%, preferably more than 50%, of the length of said surface.
6. Lame (106 ; 206) selon la revendication 5, caractérisée en ce que la surface de contact (1062 ; 2062) comprend une portion de basculement du bord, ladite portion étant située directement après la portion d'appui, dans le sens de déplacement de la tôle par rapport à la lame, le profil transversal de ladite portion de basculement présentant une variation d'inclinaison supérieure à 60° préférentiellement 90°. 6. Blade (106; 206) according to claim 5, characterized in that the contact surface (106 2 ; 206 2 ) comprises a tilting portion of the edge, said portion being located directly after the support portion, in the direction of movement of the sheet relative to the blade, the transverse profile of said tilting portion having an inclination variation greater than 60 ° preferably 90 °.
7. Lame (106 ; 206) selon la revendication 6, caractérisée en ce que la portion de basculement s'étend sur moins de 30% de la longueur de la surface de contact. 7. Blade (106; 206) according to claim 6, characterized in that the tilting portion extends over less than 30% of the length of the contact surface.
8. Lame (6) selon la revendication 4, caractérisée en ce que le profil transversal de la zone d'entrée est incliné vers l'extérieur de la lame sur la totalité de l'étendue de la surface de contact. 8. Blade (6) according to claim 4, characterized in that the transverse profile of the inlet zone is inclined outwardly of the blade over the entire extent of the contact surface.
9. Procédé de pliage d'un bord (22 ; 1022 ; 2022) d'une tôle métallique (2 ; 102 ; 9. A method of folding an edge (2 2 ; 102 2 ; 202 2 ) of a metal sheet (2; 102;
202), comprenant une étape de déplacement d'une lame de pliage (6 ; 106 ; 202), comprising a step of moving a folding blade (6; 106;
206) le long dudit bord (22 ; 1022 ; 2022), caractérisé en ce que la lame (6 ; 106 ; 206) est conforme à l'une des revendications 1 à 8, et en ce que le bord (22 ; 1022 ; 2022) forme, avant le pliage par la lame (6 ; 106 ; 206), un angle a avec la tôle qui est compris entre 20° et 60° ou entre 120° et 180 ° et ce que le bord (22 ; 1022 ; 2022), après le pliage par la lame (6 ; 106 ; 206), est rabattu sur la tôle (2 ; 102 ; 202). 206) along said edge (2 2 ; 102 2 ; 202 2 ), characterized in that the blade (6; 106; 206) is according to one of claims 1 to 8, and that the edge (2 2 ; 102 2 ; 202 2 ) forms, before folding by the blade (6; 106; 206), an angle α with the sheet which is between 20 ° and 60 ° or between 120 ° and 180 ° and that the edge (2 2 ; 102 2 ; 202 2 ), after folding by the blade (6; 106; 206), is folded over the sheet (2; 102; 202).
10. Procédé selon la revendication 9, caractérisé en ce que lors du pliage par la lame (6 ; 106 ; 206), le bord (22 ; 1022 ; 2022) de la tôle (2 ; 102 ; 202) est rabattu sur un bord (42 ; 1042 ; 2042) d'une autre tôle (4 ; 104 ; 204), de manière à réaliser un sertissage entre lesdites tôles (2, 4 ; 102, 104 ; 202,10. Method according to claim 9, characterized in that during folding by the blade (6; 106; 206), the edge (2 2 ; 102 2 ; 202 2 ) of the sheet (2; 102; 202) is folded down. on one edge (4 2 ; 104 2 ; 204 2 ) of another sheet (4; 104; 204), so as to effect crimping between said sheets (2, 4; 102, 104;
204). 204).
PCT/FR2017/050173 2016-02-22 2017-01-26 Blade and method for crimping metal sheets WO2017144791A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17707603.1A EP3419774B1 (en) 2016-02-22 2017-01-26 Blade and method for crimping metal sheets
ES17707603T ES2767101T3 (en) 2016-02-22 2017-01-26 Blade and veneer crimping procedure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1651437A FR3047913B1 (en) 2016-02-22 2016-02-22 BLADE AND METHOD OF CRIMPING SHEETS
FR1651437 2016-02-22

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WO2017144791A1 true WO2017144791A1 (en) 2017-08-31

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ES (1) ES2767101T3 (en)
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FR3101266A1 (en) 2019-09-30 2021-04-02 Psa Automobiles Sa CRIMPING TOOL AND METHOD FOR CRIMPING THE EDGES OF TWO SHEET PIECES
WO2023025997A1 (en) 2021-08-24 2023-03-02 Psa Automobiles Sa Head for folding the edge of a metal sheet by 180° with bearing roller and associated folding method

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Publication number Priority date Publication date Assignee Title
FR3121371A1 (en) 2021-03-31 2022-10-07 Psa Automobiles Sa DEVICE FOR CRIMPING METAL SHEET EDGES, ROBOT AND ASSOCIATED CRIMPING METHOD
DE102021132428A1 (en) * 2021-12-09 2023-06-15 Bayerische Motoren Werke Aktiengesellschaft Fold forming tool, fold forming device and method for producing a fold bonded joint

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FR2987290A1 (en) * 2012-02-28 2013-08-30 Peugeot Citroen Automobiles Sa Crimping blade for use in crimping device to crimp edges of sheet parts for manufacturing e.g. car door, has crimping gimlets for folding up edge of one part on other edge, where two of gimlets are placed symmetrical with respect to plane
FR2990887A1 (en) * 2012-05-24 2013-11-29 Peugeot Citroen Automobiles Sa Device for crimping two sheet parts with each other for front cover of car, has blade whose face comprises cross-sectional recess in back of gimlet, where recess is in shape of circular arc whose axis is parallel to displacement direction
FR3008331A1 (en) * 2013-07-15 2015-01-16 Peugeot Citroen Automobiles Sa DEVICE FOR CRIMPING TWO SHEETS BY FRICTION AND METHOD FOR IMPLEMENTING SAME

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Publication number Priority date Publication date Assignee Title
US6609406B1 (en) * 2002-07-23 2003-08-26 Lord Corporation Tool and method for reorienting a flange
FR2987290A1 (en) * 2012-02-28 2013-08-30 Peugeot Citroen Automobiles Sa Crimping blade for use in crimping device to crimp edges of sheet parts for manufacturing e.g. car door, has crimping gimlets for folding up edge of one part on other edge, where two of gimlets are placed symmetrical with respect to plane
FR2990887A1 (en) * 2012-05-24 2013-11-29 Peugeot Citroen Automobiles Sa Device for crimping two sheet parts with each other for front cover of car, has blade whose face comprises cross-sectional recess in back of gimlet, where recess is in shape of circular arc whose axis is parallel to displacement direction
FR3008331A1 (en) * 2013-07-15 2015-01-16 Peugeot Citroen Automobiles Sa DEVICE FOR CRIMPING TWO SHEETS BY FRICTION AND METHOD FOR IMPLEMENTING SAME

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Publication number Priority date Publication date Assignee Title
FR3101266A1 (en) 2019-09-30 2021-04-02 Psa Automobiles Sa CRIMPING TOOL AND METHOD FOR CRIMPING THE EDGES OF TWO SHEET PIECES
WO2023025997A1 (en) 2021-08-24 2023-03-02 Psa Automobiles Sa Head for folding the edge of a metal sheet by 180° with bearing roller and associated folding method
FR3126324A1 (en) 2021-08-24 2023-03-03 Psa Automobiles Sa 180° METAL SHEET EDGE FOLDING HEAD WITH SUPPORT ROLLER

Also Published As

Publication number Publication date
EP3419774A1 (en) 2019-01-02
EP3419774B1 (en) 2019-12-11
ES2767101T3 (en) 2020-06-16
FR3047913B1 (en) 2018-02-23
FR3047913A1 (en) 2017-08-25

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