EP3219405B1 - Stamping tool for motor vehicle blank - Google Patents

Stamping tool for motor vehicle blank Download PDF

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Publication number
EP3219405B1
EP3219405B1 EP17155165.8A EP17155165A EP3219405B1 EP 3219405 B1 EP3219405 B1 EP 3219405B1 EP 17155165 A EP17155165 A EP 17155165A EP 3219405 B1 EP3219405 B1 EP 3219405B1
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EP
European Patent Office
Prior art keywords
retractable
guide
tool
strip
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17155165.8A
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German (de)
French (fr)
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EP3219405A1 (en
Inventor
Philippe SOUDY
Arnaud HERVE
Yann Riou
Pascal Desreaux
Mickael LALANDE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stellantis Auto SAS
Original Assignee
PSA Automobiles SA
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Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3219405A1 publication Critical patent/EP3219405A1/en
Application granted granted Critical
Publication of EP3219405B1 publication Critical patent/EP3219405B1/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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/021—Control or correction devices in association with moving strips
    • B21D43/023—Centering devices, e.g. edge guiding
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools

Definitions

  • the invention relates to the field of cutting sheet metal blanks. More specifically, the invention relates to a stamping tool on a press for cutting a blank according to a given length from a strip of sheet metal.
  • the production of a motor vehicle structure brings together a plurality of sheets. These sheets are cut, shaped, then welded to form a box. Economically, the sheets come from a coil segmented into sections of the same length using a stamping tool. This same stamping tool also makes it possible to cut discontinuous edges. In known manner, these discontinuous edges in waves favor a saving of material.
  • the document US5604044A discloses a stamping press installation. This installation makes it possible to cut blanks from a coil supplying the sheet metal installation.
  • the installation comprises a stamping tool with a lower part and an upper part. These parts make it possible to cut blanks according to a predetermined pattern.
  • the document JP2007216233 on which the preamble of claim 1 is based, discloses a stamping press installation with a positioning mechanism which ensures high positioning accuracy in the width direction of a strip-shaped metal member and excellent workability .
  • the object of the invention is to solve at least one of the problems posed by the prior art. More precisely, the aim of the invention is to reduce the costs production of several types of blanks. The invention also aims to reduce the impact of a product change.
  • the subject of the invention is a lower part of a stamping tool for cutting blanks from a sheet metal strip, in particular a sheet metal coil, the lower part comprising: a sheet metal strip advancing zone with an upper surface, and a blade for cutting blanks from the sheet metal strip, said blade being disposed at the level of the upper surface comprising at least one retractable strip guide under the upper surface which is at least partially disposed in the advancement zone, remarkable in that it comprises at least one matrix forming an orifice which is arranged in alignment with at least one retractable strip guide in the direction of advancement of the sheet metal strip.
  • the invention also relates to a stamping tool on a stamping press, the tool comprising an upper part and a lower part suitable for cutting a sheet between them when the tool is closed, remarkable in that the lower part is in accordance with the invention.
  • the lower surface covers several strip guides; retractable and/or fixed.
  • the invention offers a stamping tool making it possible to work with different sheet widths, and therefore to produce blanks of variable widths.
  • the same tool is compatible with blank thicknesses between 0.50mm and 2.00mm.
  • the retractable strip guides can be interposed between the fixed strip guides, and between the sliding means. They are also compatible with the presence of different dies, so that different models of blanks can be produced. The same tool can therefore be used for different parts, resulting in tool savings.
  • the invention makes it possible to eliminate tool change phases when the width of the sheet changes. This results in a saving in labor time, and in a reduction in downtime of the production line. Adjustment phases can also be deleted.
  • the same stamping tool makes it possible to detach the blanks for the roofs, sliding or pivoting doors, and the sides of the passenger compartments of a commercial vehicle. It is possible to make a left or right blank, whether for a lining or for a skin.
  • longitudinal refers to the direction of advancement of the sheet metal strip.
  • transverse direction is considered relative to the running direction of the sheet metal strip.
  • the height is measured according to the closing direction of the tool.
  • FIG. 1 shows a top view of a stamping tool part, in this case a lower part 2.
  • the lower part 2 can be a lower frame.
  • the lower part 2 has an elongated shape, for example a rectangle shape. Each corner of the rectangle can have hooking points for lifting, and possibly centering points.
  • the lower part 2 has a zone 4 in which the filler plate runs in the form of a band.
  • the strip is of constant width thanks to its parallel edges.
  • the sheet can advance there step by step thanks to an advancement mechanism.
  • the advancing zone 4 is delimited transversely by the width which is swept by the plate as it progresses.
  • the sheet may come from a coil where it has previously been wound.
  • Advancement zone 4 has an upper surface 6, for example of rectangular shape.
  • the upper surface 6 is adapted to come into contact with the sheet when closing the stamping tool. It also keeps it hanging while cutting.
  • sliding means 8 are distributed over the lower part 2. They can occupy the entire length of the advancing zone 4. They can be regularly spaced apart along the width of the lower part 2. They can be of elongated shapes according to the direction of advancement of the sheet metal strip. When closing the tool, the sliding means 8 retract until the sheet reaches the upper surface 6. They can be mounted in recesses provided in the lower part 2 of the tool.
  • the lower part 2 can comprise a blade 10.
  • the blade 10 is suitable for detaching blanks from the strip.
  • the blade 10 may be a transverse blade 10, in the sense that it is arranged transversely to the longitudinal central axis 12 of the upper surface 6.
  • This longitudinal central axis 12 may be the central axis 12 of the sheet metal strip, and therefore the median axis 12 of the advancing zone 4.
  • the median aspect is understood in the transverse direction.
  • the blade 10 is arranged perpendicular to the central axis 12. Its cutting edge may be wavy. It can be sinusoidal, its discontinuities can describe curves or any other pattern.
  • the lower part 2 can comprise one or more stamping dies adapted to cooperate with a punch.
  • the dies can include openwork dies 14 making it possible to make openings in the sheet. By this means, the blank produced is already perforated, which simplifies the stamping tooling which will be used subsequently.
  • the dies may also include edge dies 16. These allow rounding to be formed on the edges of the blank. More particularly, they make it possible to cut any shapes of teeth at the corners of the blanks. Such teeth can become particularly sharp when the blade 10 is sinusoidal.
  • the advancing zone 4 of the sheet is bordered by fixed strip guides 18 or fixed sheet guides. They form projections against which the sheet slides since they are in elevation with respect to the upper surface 6. They may include rotating rollers to avoid friction against the sheet.
  • the fixed strip guides 18 make it possible to center and align the sheet relative to the central axis 12. Thus the position of the sheet relative to the blade 10 is controlled, as is the angle of the cut.
  • These strip guides 18 are linked to the lower part of the tool 2. They retain their height relative to the upper surface 6.
  • the fixed strip guides 18 are arranged in two parallel straight lines on either side of the zone of advancement 4.
  • the lower part 2 of the tool is also provided with at least one or more retractable strip guides 20, also called retractable sheet guides. They are vertically movable, so as to guide the sheet or not.
  • the retractable strip guides 20 are at least partially arranged in the advancement zone 4. Some are completely in the zone 4, others are partially there, overlapping a lateral edge of the advancement zone 4.
  • the strip guides retractable strips 20 are generally arranged at the edges of the advancing zone 4. However, the spacing of the retractable strip guides 20 with respect to the central axis 12 varies. They are distributed transversely over the edges of the zone 4. For example, certain retractable strip guides 20 can be arranged in the transverse space between two sliding means 8.
  • the retractable strip guides 20 can be distributed along the lower part 2. They can be arranged symmetrically with respect to the central axis 12.
  • the retractable strip guides 20 can form an entrance clearance, a central clearance , and an exit clearance at the blade 10. At least one or each clearance may include retractable web guides 20 evenly distributed on either side of axis 10, and/or distributed symmetrically with respect to axis 12.
  • the entry gap guides the strip when it enters the tool. It may comprise two symmetrical groups of retractable strip guides 20. They are opposite blade 10. They may be placed at the vertices of triangles, and/or at the vertices of hexagons.
  • the input groups can each include six retractable web guides 20.
  • the central clearance is in the middle longitudinally of the lower part 2. It can comprise substantially equal numbers of retractable strip guides 20 on each side of the central axis 12.
  • a perforating matrix 14 can be placed between two strip guides retractable strips 20.
  • At least one or each edge die 16 can be placed between the blade 10 and one of the retractable strip guides 20, and possibly in alignment with said retractable strip guide 20. This alignment makes it possible to eliminate the tooth which could be cut on the blank.
  • each retractable tape guide 20 of a group is associated with another retractable tape guide 20 of another group of the same set, said retractable tape guides 20 being equidistant with respect to the central axis 12. majority or all of the retractable web guides 20 form pairs of retractable web guides 20 equidistant from the central axis 12.
  • FIG. 2 shows a section of the stamping tool in the open configuration.
  • the lower part 2 corresponds to that of the figure 1 .
  • the following teaching can be applied to each retractable web guide 20.
  • the lower part 2 is able to cooperate with the upper part 22 of the stamping tool.
  • Top 22 may be a top frame. It may include a complementary blade (not shown) to that of the lower part 2. These parts (2; 22) are intended to be mounted on a stamping press (not shown) to shape the sheet 24 placed between them. .
  • the tool is suitable for steel sheets with thicknesses between 0.65mm and 1.5mm. Aluminum is also possible.
  • the upper part 22 is shown at a distance from the lower part 2 which allows the sliding of the sheet 24 on the sliding means 8.
  • a fixed strip guide 18 is shown in the background.
  • a retractable tape guide 20 is shown in the retracted position using a solid line, and using a dotted line for the deployed position.
  • a housing 26 formed in the lower part 2 completely contains the retractable tape guide 20 when it is retracted.
  • the lower part 2 comprises an electric or pneumatic actuator 28 making it possible to raise and lower the retractable strip guide 20.
  • An actuator 28 can be provided for each retractable strip guide 20 so as to drive it independently.
  • Retractable web guide 20 may include a roller adapted to roll against the edge of sheet metal 24 to reduce friction.
  • the stamping tool can be designed to be closed while the retractable web guide 20 is extended. However, in the closed position the upper part 22 remains at a distance from the retractable strip guide 20.
  • the upper part 22 may have a lower surface 30 remaining spaced from the retractable strip guide 20, despite the bringing together of the lower part 2.
  • the vertical spacing between the lower surface 30 and the top of the retractable web guide 20 can be at least 10 mm, or at least 20 in the closed position.
  • Bottom surface 30 can be generally planar and/or continuous. It can cover several retractable strip guides 20 and/or at least one fixed strip guide 18.
  • the present invention has been detailed in relation to the lower part 2 of the stamping tool. However, in an unclaimed variant, this teaching can be applied to the upper part.
  • the transverse gap between the furthest strip guides exceeds by at least 10%, or 20% or 40% the transverse gap between the guides -bands less distant.
  • the stamping tool on a stamping press comprises an upper part and a lower part suitable for cutting a sheet between them when the tool is closed, the lower part being in accordance with invention, the upper part presenting a lower surface opposite and at a distance from the retractable tape guide when the tool is closed.
  • the sliding means 8 can be brushes on which the sheet slides as it advances step by step.

Description

L'invention se rapporte au domaine de la découpe de flans de tôle. Plus précisément, l'invention concerne un outil d'emboutissage sur presse pour découper un flan selon une longueur donnée à partir d'une bande de tôle.The invention relates to the field of cutting sheet metal blanks. More specifically, the invention relates to a stamping tool on a press for cutting a blank according to a given length from a strip of sheet metal.

La réalisation d'une structure de véhicule automobile réunit une pluralité de tôles. Ces tôles sont coupées, mises en forme, puis soudées de manière à former une caisse. De manière économique, les tôles sont issues d'une bobine segmentée en tronçons de même longueur grâce à un outil d'emboutissage. Ce même outil d'emboutissage permet d'ailleurs de découper des bords discontinus. De manière connue, ces bords discontinus en vagues favorisent une économie de matière.The production of a motor vehicle structure brings together a plurality of sheets. These sheets are cut, shaped, then welded to form a box. Economically, the sheets come from a coil segmented into sections of the same length using a stamping tool. This same stamping tool also makes it possible to cut discontinuous edges. In known manner, these discontinuous edges in waves favor a saving of material.

Le document US5604044 A divulgue une installation de presse d'emboutissage. Cette installation permet de couper des flans à partir d'une bobine alimentant l'installation en tôle. L'installation comporte un outil d'emboutissage avec une partie inférieure et une partie supérieure. Ces parties permettent de découper des flans selon un modèle prédéterminé.The document US5604044A discloses a stamping press installation. This installation makes it possible to cut blanks from a coil supplying the sheet metal installation. The installation comprises a stamping tool with a lower part and an upper part. These parts make it possible to cut blanks according to a predetermined pattern.

Le document JP2007216233 , sur lequel se base le préambule de la revendication 1, divulgue installation de presse d'emboutissage avec un mécanisme de positionnement qui assure une grande précision de positionnement dans le sens de la largeur d'un élément métallique en forme de bande et une excellente maniabilité.The document JP2007216233 , on which the preamble of claim 1 is based, discloses a stamping press installation with a positioning mechanism which ensures high positioning accuracy in the width direction of a strip-shaped metal member and excellent workability .

Or l'industrie automobile tend à diversifier ses gammes de véhicules, si bien qu'un même véhicule est décliné en plusieurs variantes. Par exemple, un type de véhicule peut être produit selon différentes longueurs, ou avec différents types d'ouvrant. Ce besoin multiplie les modèles de tôles à réaliser, si bien que leur coût de revient augmente. En effet, l'outillage nécessaire doit être décliné en autant de versions que le nombre des modèles de tôles. Par ailleurs lors de la production des pièces en série, les changements d'outillage requièrent de la main d'oeuvre, en plus d'immobiliser la ligne de production.However, the automobile industry tends to diversify its ranges of vehicles, so much so that the same vehicle is available in several variants. For example, a type of vehicle can be produced according to different lengths, or with different types of opening. This need multiplies the sheet metal models to be produced, so that their cost price increases. Indeed, the necessary tools must be available in as many versions as the number of sheet metal models. Moreover, during the production of parts in series, tooling changes require labor, in addition to immobilizing the production line.

L'invention a pour objectif de résoudre au moins un des problèmes posés par l'art antérieur. Plus précisément, l'invention a pour objectif de réduire les coûts de fabrication de plusieurs types de flans. L'invention a également pour objectif de réduire l'impact d'un changement de produit.The object of the invention is to solve at least one of the problems posed by the prior art. More precisely, the aim of the invention is to reduce the costs production of several types of blanks. The invention also aims to reduce the impact of a product change.

L'invention a pour objet une partie inférieure d'outil d'emboutissage pour découpe de flans à partir d'une bande de tôle, notamment d'une bobine de tôle, la partie inférieure comprenant : une zone d'avancement de bande de tôle avec une surface supérieure, et une lame de découpe de flans à partir de la bande de tôle, ladite lame étant disposée au niveau de la surface supérieure comprenant au moins un guide-bande rétractable sous la surface supérieure qui est au moins partiellement disposé dans la zone d'avancement, remarquable en ce qu'elle comprend au moins une matrice formant un orifice qui est disposé dans l'alignement du au moins un guide-bande rétractable selon la direction d'avancement de la bande de tôle.The subject of the invention is a lower part of a stamping tool for cutting blanks from a sheet metal strip, in particular a sheet metal coil, the lower part comprising: a sheet metal strip advancing zone with an upper surface, and a blade for cutting blanks from the sheet metal strip, said blade being disposed at the level of the upper surface comprising at least one retractable strip guide under the upper surface which is at least partially disposed in the advancement zone, remarkable in that it comprises at least one matrix forming an orifice which is arranged in alignment with at least one retractable strip guide in the direction of advancement of the sheet metal strip.

Selon des modes particuliers de réalisation, la partie inférieure peut comprendre une ou plusieurs des caractéristiques suivantes, prises isolément ou selon toutes les combinaisons techniques possibles :

  • La partie inférieure comprend des moyens d'actionnement pour déplacer le ou chaque guide-bande rétractable entre une position rétractée sous la surface supérieure, et une position déployée en saillie par rapport à la surface supérieure.
  • La zone d'avancement comprend des moyens de glissement, notamment de brosses, qui sont répartis sur la zone d'avancement, le au moins un guide-bande rétractable étant disposé entre deux moyens de glissement.
  • La lame est une lame transversale, le au moins un guide-bande rétractable étant placé sur la partie inférieure d'outil à l'opposé de ladite lame transversale.
  • La partie inférieure comprend en outre des guide-bandes dont la hauteur est fixe par rapport à la surface supérieure, lesdits guide-bandes fixes délimitant transversalement la zone d'avancement.
  • Le guide-bande rétractable est un premier guide-bande rétractable, la partie inférieure comprenant en outre un deuxième guide-bande rétractable sous la surface supérieure qui est au moins partiellement disposé dans la zone d'avancement, et disposé entre le premier guide-bande rétractable et la lame.
  • Le guide-bande rétractable est un premier guide-bande rétractable, la zone d'avancement comprenant en outre un troisième guide-bande rétractable sous la surface supérieure qui est au moins partiellement disposé dans la zone d'avancement, et disposé transversalement à l'opposé du premier guide-bande rétractable.
  • La partie inférieure comprend une pluralité de guide-bandes rétractables sous la surface supérieure qui sont au moins partiellement disposés dans la zone d'avancement, lesdits guide-bandes rétractables étant éventuellement disposés de manière symétrique.
  • Au moins un ou plusieurs guide-bandes rétractables sont totalement disposés dans la zone d'avancement.
  • La lame est adaptée pour couper la bande de tôle sur toute sa largeur.
  • Les moyens d'actionnement sont configurés pour déplacer les guide-bandes rétractables indépendamment les uns des autres.
  • Le au moins un guide-bande rétractable est disposé à une extrémité de la partie inférieure d'outil, éventuellement à un coin.
  • La zone d'avancement comprend une zone centrale selon la direction d'avancement de la bande, le au moins un guide-bande rétractable étant disposé dans la zone centrale.
  • Le ou chaque guide-bande rétractable est disposé au niveau d'un bord, notamment un bord latéral de la zone d'avancement.
  • Les guide-bandes fixes sont alignés, éventuellement parallèlement à la direction d'avancement.
  • Chaque guide-bande rétractable est plus proche de l'axe médian que le ou chaque guide-bande fixe.
  • La longueur de la surface supérieure est supérieure ou égale à 1 m, ou à 1,5m, ou à 2m, ou à 2,5m, ou à 3m, ou à 3,5m.
  • Les guide-bandes rétractables sont répartis de manière égale de part et d'autre de l'axe médian.
  • Les guide-bandes rétractables sont généralement disposés de manière symétrique par rapport à l'axe médian.
  • Les guide-bandes rétractables forment des paires ou des groupes de quatre guide-bandes rétractables équidistants par rapport à l'axe médian.
  • La lame de coupe s'étend sur toute la largeur de la zone d'avancement, et/ou chaque guide-bandes rétractable est disposé dans le prolongement de la lame selon la direction d'avancement de la bande de tôle.
  • La matrice est disposée entre au moins deux guide-bandes rétractables.
According to particular embodiments, the lower part may include one or more of the following characteristics, taken individually or according to all possible technical combinations:
  • The lower part comprises actuating means for moving the or each retractable strip guide between a retracted position under the upper surface, and an extended position projecting relative to the upper surface.
  • The advancing zone comprises sliding means, in particular brushes, which are distributed over the advancing zone, the at least one retractable strip guide being placed between two sliding means.
  • The blade is a transverse blade, the at least one retractable strip guide being placed on the lower part of the tool opposite said transverse blade.
  • The lower part further comprises strip guides whose height is fixed relative to the upper surface, said fixed strip guides transversely delimiting the advancing zone.
  • The retractable tape guide is a first retractable tape guide, the lower part further comprising a second tape guide retractable under the upper surface which is at least partially disposed in the advancing zone, and disposed between the first retractable web guide and the blade.
  • The retractable web guide is a first retractable web guide, the advancing zone further comprising a third retractable web guide below the upper surface which is at least partially disposed within the advancing zone, and disposed transversely to the opposite of the first retractable web guide.
  • The lower part comprises a plurality of retractable strip guides under the upper surface which are at least partially arranged in the advancing zone, said retractable strip guides possibly being arranged symmetrically.
  • At least one or more retractable web guides are fully arranged in the advancing zone.
  • The blade is suitable for cutting the sheet metal strip over its entire width.
  • The actuating means are configured to move the retractable strip guides independently of each other.
  • The at least one retractable strip guide is arranged at one end of the lower part of the tool, possibly at a corner.
  • The advancement zone comprises a central zone in the direction of advancement of the strip, the at least one retractable strip guide being arranged in the central zone.
  • The or each retractable strip guide is arranged at an edge, in particular a side edge of the advancing zone.
  • The fixed web guides are aligned, possibly parallel to the direction of travel.
  • Each retractable web guide is closer to the centerline than the or each fixed web guide.
  • The length of the upper surface is greater than or equal to 1 m, or 1.5 m, or 2 m, or 2.5 m, or 3 m, or 3.5 m.
  • The retractable web guides are equally distributed on either side of the central axis.
  • Retractable web guides are generally arranged symmetrically with respect to the center axis.
  • Retractable web guides form pairs or groups of four retractable web guides equidistant from the centerline.
  • The cutting blade extends over the entire width of the advancement zone, and/or each retractable strip guide is arranged in the extension of the blade in the direction of advancement of the sheet metal strip.
  • The die is disposed between at least two retractable strip guides.

L'invention a également pour objet un outil d'emboutissage sur presse d'emboutissage, l'outil comprenant une partie supérieure et une partie inférieure adaptées pour découper une tôle entre elles lors de la fermeture de l'outil, remarquable en ce que la partie inférieure est conforme à l'invention.The invention also relates to a stamping tool on a stamping press, the tool comprising an upper part and a lower part suitable for cutting a sheet between them when the tool is closed, remarkable in that the lower part is in accordance with the invention.

Selon un mode particulier, la surface inférieure recouvre plusieurs guide-bandes ; rétractables et/ou fixes.According to a particular embodiment, the lower surface covers several strip guides; retractable and/or fixed.

L'invention offre un outil d'emboutissage permettant de travailler avec différentes largeurs de tôles, et donc de produire des flans de largeurs variable. Un même outil est compatible avec des épaisseurs de flans comprises entre 0,50mm et 2,00mm. Les guide-bandes rétractables peuvent être intercalés entre les guide-bandes fixes, et entre les moyens de glissement. Ils sont également compatibles avec la présence de différentes matrices, si bien que différents modèles de flans peuvent être produits. Le même outil peut donc être employé pour différentes pièces, d'où une économie d'outillage.The invention offers a stamping tool making it possible to work with different sheet widths, and therefore to produce blanks of variable widths. The same tool is compatible with blank thicknesses between 0.50mm and 2.00mm. The retractable strip guides can be interposed between the fixed strip guides, and between the sliding means. They are also compatible with the presence of different dies, so that different models of blanks can be produced. The same tool can therefore be used for different parts, resulting in tool savings.

En complément, l'invention permet de supprimer des phases de changement d'outils lorsque la largeur de la tôle évolue. Ceci se traduit par un gain de temps de main d'oeuvre, et par une réduction de temps d'immobilisation de la ligne de production. Des phases de réglage peuvent également être supprimées.In addition, the invention makes it possible to eliminate tool change phases when the width of the sheet changes. This results in a saving in labor time, and in a reduction in downtime of the production line. Adjustment phases can also be deleted.

A titre d'exemple, un même outil d'emboutissage permet de détacher les flans pour des pavillons, des portes coulissantes ou pivotantes, et des côtés d'habitacles d'un véhicule utilitaire. Il est possible de réaliser un flan gauche ou droit, que ce soit pour une doublure ou pour une peau.By way of example, the same stamping tool makes it possible to detach the blanks for the roofs, sliding or pivoting doors, and the sides of the passenger compartments of a commercial vehicle. It is possible to make a left or right blank, whether for a lining or for a skin.

D'autres caractéristiques et avantages de la présente invention seront mieux compris à l'aide de la description donnée à titre d'exemple et en référence aux dessins parmi lesquels :

  • La figure 1 présente une partie inférieure d'un outil d'emboutissage selon l'invention.
  • La figure 2 illustre un outil d'emboutissage en position ouverte selon l'invention.
Other characteristics and advantages of the present invention will be better understood using the description given by way of example and with reference to the drawings, among which:
  • There figure 1 presents a lower part of a stamping tool according to the invention.
  • There figure 2 illustrates a stamping tool in the open position according to the invention.

Dans la description qui va suivre, le terme longitudinal renvoie à la direction d'avancement de la bande de tôle. La direction transversale est considérée par rapport à la direction de défilement de la bande de tôle. La hauteur est mesurée selon la direction de fermeture de l'outil.In the following description, the term longitudinal refers to the direction of advancement of the sheet metal strip. The transverse direction is considered relative to the running direction of the sheet metal strip. The height is measured according to the closing direction of the tool.

La figure 1 montre une vue du dessus d'une partie d'outil d'emboutissage, en l'occurrence une partie inférieure 2. La partie inférieure 2 peut être un bâti inférieur.There figure 1 shows a top view of a stamping tool part, in this case a lower part 2. The lower part 2 can be a lower frame.

La partie inférieure 2 présente une forme allongée, par exemple une forme de rectangle. Chaque coin du rectangle peut présenter des points d'accrochage pour le levage, et éventuellement des points de centrage. La partie inférieure 2 présente une zone 4 dans laquelle la tôle d'apport défile sous la forme d'une bande. La bande est de largeur constante grâce à ses bords parallèles. La tôle peut y avancer pas à pas grâce à un mécanisme d'avancement. La zone d'avancement 4 est délimitée transversalement par la largeur qui est balayée par la tôle lors de sa progression. La tôle peut être issue d'une bobine où elle a préalablement été enroulée.The lower part 2 has an elongated shape, for example a rectangle shape. Each corner of the rectangle can have hooking points for lifting, and possibly centering points. The lower part 2 has a zone 4 in which the filler plate runs in the form of a band. The strip is of constant width thanks to its parallel edges. The sheet can advance there step by step thanks to an advancement mechanism. The advancing zone 4 is delimited transversely by the width which is swept by the plate as it progresses. The sheet may come from a coil where it has previously been wound.

La zone d'avancement 4 présente une surface supérieure 6, par exemple de forme rectangulaire. La surface supérieure 6 est adaptée pour entrer en contact de la tôle lors de la fermeture de l'outil d'emboutissage. Elle la maintient également pendant lors de la découpe. Optionnellement, des moyens de glissement 8 sont répartis sur la partie inférieure 2. Ils peuvent occuper toute la longueur de la zone d'avancement 4. Ils peuvent être régulièrement écartés selon la largeur de la partie inférieure 2. Ils peuvent être de formes allongés selon la direction d'avancement de la bande de tôle. Lors de la fermeture de l'outil, les moyens de glissement 8 se rétractent jusqu'à ce que la tôle atteigne la surface supérieure 6. Ils peuvent être montés dans des dégagements prévus dans la partie inférieure 2 de l'outil.Advancement zone 4 has an upper surface 6, for example of rectangular shape. The upper surface 6 is adapted to come into contact with the sheet when closing the stamping tool. It also keeps it hanging while cutting. Optionally, sliding means 8 are distributed over the lower part 2. They can occupy the entire length of the advancing zone 4. They can be regularly spaced apart along the width of the lower part 2. They can be of elongated shapes according to the direction of advancement of the sheet metal strip. When closing the tool, the sliding means 8 retract until the sheet reaches the upper surface 6. They can be mounted in recesses provided in the lower part 2 of the tool.

La partie inférieure 2 peut comprendre une lame 10. La lame 10 est adaptée pour détacher des flans de la bande. La lame 10 peut être une lame 10 transversale, en ce sens qu'elle est disposée transversalement à l'axe médian longitudinal 12 de la surface supérieure 6. Cet axe médian longitudinal 12 peut être l'axe médian 12 de la bande de tôle, et donc l'axe médian 12 de la zone d'avancement 4. L'aspect médian est entendu selon la direction transversale. En l'occurrence, la lame 10 est agencée perpendiculairement à l'axe médian 12. Son arête de coupe peut être ondulée. Elle peut être sinusoïdale, ses discontinuités peuvent décrire des arrondis ou tout autre motif.The lower part 2 can comprise a blade 10. The blade 10 is suitable for detaching blanks from the strip. The blade 10 may be a transverse blade 10, in the sense that it is arranged transversely to the longitudinal central axis 12 of the upper surface 6. This longitudinal central axis 12 may be the central axis 12 of the sheet metal strip, and therefore the median axis 12 of the advancing zone 4. The median aspect is understood in the transverse direction. In this case, the blade 10 is arranged perpendicular to the central axis 12. Its cutting edge may be wavy. It can be sinusoidal, its discontinuities can describe curves or any other pattern.

La partie inférieure 2 peut comprendre une ou plusieurs matrices d'emboutissage adaptées pour coopérer avec un poinçon. Les matrices peuvent comprendre des matrices d'ajourage 14 permettant de réaliser des ajours dans la tôle. Par ce biais, le flan produit est déjà ajouré, ce qui simplifie l'outillage d'emboutissage qui sera utilisé ultérieurement. Les matrices peuvent également inclure des matrices de bord 16. Celles-ci permettent de former des arrondis sur les bords du flan. Plus particulièrement, ils permettent de couper des éventuelles formes de dents aux coins des flans. De telles dents peuvent devenir particulièrement pointues lorsque la lame 10 est sinusoïdale.The lower part 2 can comprise one or more stamping dies adapted to cooperate with a punch. The dies can include openwork dies 14 making it possible to make openings in the sheet. By this means, the blank produced is already perforated, which simplifies the stamping tooling which will be used subsequently. The dies may also include edge dies 16. These allow rounding to be formed on the edges of the blank. More particularly, they make it possible to cut any shapes of teeth at the corners of the blanks. Such teeth can become particularly sharp when the blade 10 is sinusoidal.

La zone d'avancement 4 de la tôle est bordée par des guide-bandes fixes 18 ou guide-tôle fixes. Ils forment des saillies contre lesquelles la tôle glisse puisqu'ils sont en élévation par rapport à la surface supérieure 6. Ils peuvent comprendre des rouleaux tournant pour éviter les frottements contre la tôle. Les guide-bandes fixes 18 permettent de centrer et d'aligner la tôle par rapport à l'axe médian 12. Ainsi la position de la tôle par rapport à la lame 10 est maîtrisée, tout comme l'angle de la découpe. Ces guide-bandes 18 sont liés à la partie inférieure d'outil 2. Ils conservent leur hauteur par rapport à la surface supérieure 6. Les guide-bandes fixes 18 sont agencés selon deux droites parallèles de part et d'autre de la zone d'avancement 4.The advancing zone 4 of the sheet is bordered by fixed strip guides 18 or fixed sheet guides. They form projections against which the sheet slides since they are in elevation with respect to the upper surface 6. They may include rotating rollers to avoid friction against the sheet. The fixed strip guides 18 make it possible to center and align the sheet relative to the central axis 12. Thus the position of the sheet relative to the blade 10 is controlled, as is the angle of the cut. These strip guides 18 are linked to the lower part of the tool 2. They retain their height relative to the upper surface 6. The fixed strip guides 18 are arranged in two parallel straight lines on either side of the zone of advancement 4.

La partie inférieure 2 d'outil est également munie d'au moins un ou plusieurs guide-bandes rétractables 20, également appelé guide-tôles rétractables. Ils sont mobiles verticalement, de manière à guider ou non la tôle. Les guide-bandes rétractables 20 sont au moins partiellement disposés dans la zone d'avancement 4. Certains sont totalement dans la zone 4, d'autres y sont partiellement en chevauchant un bord latéral de la zone d'avancement 4. Les guide-bandes rétractables 20 sont généralement disposés au niveau des bords de la zone d'avancement 4. Toutefois, l'écartement des guide-bandes rétractables 20 par rapport à l'axe médian 12 varie. Ils sont répartis transversalement sur les bords de la zone 4. Par exemple, certains guide-bandes rétractables 20 peuvent être disposés dans l'espace transversal entre deux moyens de glissement 8. Cette configuration permet de coopérer avec des tôles de différentes largeurs puisque les guide-bandes rétractables 20 peuvent être sélectivement rentrés. Lorsque tous les guide-bandes rétractables 20 sont rentrés, la partie inférieure 2 peut recevoir une tôle contre ses guide-bandes fixes 18. Cette configuration autorise alors le passage d'une bande de tôle dont la largeur est maximale. En déployant certains guide-bandes rétractables 20, la largeur de la zone d'avancement 4 se réduit progressivement.The lower part 2 of the tool is also provided with at least one or more retractable strip guides 20, also called retractable sheet guides. They are vertically movable, so as to guide the sheet or not. The retractable strip guides 20 are at least partially arranged in the advancement zone 4. Some are completely in the zone 4, others are partially there, overlapping a lateral edge of the advancement zone 4. The strip guides retractable strips 20 are generally arranged at the edges of the advancing zone 4. However, the spacing of the retractable strip guides 20 with respect to the central axis 12 varies. They are distributed transversely over the edges of the zone 4. For example, certain retractable strip guides 20 can be arranged in the transverse space between two sliding means 8. This configuration makes it possible to cooperate with sheets of different widths since the guides - 20 retractable bands can be selectively retracted. When all the retractable strip guides 20 are retracted, the lower part 2 can receive a metal sheet against its fixed strip guides 18. This configuration then allows the passage of a sheet metal strip whose width is maximum. By deploying certain retractable strip guides 20, the width of the advancing zone 4 is gradually reduced.

Les guide-bandes rétractables 20 peuvent être répartis le long de la partie inférieure 2. Ils peuvent être agencés de manière symétrique par rapport à l'axe médian 12. Les guide-bandes rétractables 20 peuvent former un jeu d'entrée, un jeu central, et un jeu de sortie au niveau de la lame 10. Au moins un ou chaque jeu peut comprendre des guide-bandes rétractables 20 répartis de manière égale de part et d'autre de l'axe 10, et/ou répartis de manière symétrique par rapport à l'axe 12.The retractable strip guides 20 can be distributed along the lower part 2. They can be arranged symmetrically with respect to the central axis 12. The retractable strip guides 20 can form an entrance clearance, a central clearance , and an exit clearance at the blade 10. At least one or each clearance may include retractable web guides 20 evenly distributed on either side of axis 10, and/or distributed symmetrically with respect to axis 12.

Le jeu d'entrée permet de guider la bande lorsqu'elle rentre dans l'outil. Il peut comporter deux groupes symétriques de guide-bandes rétractables 20. Ils sont à l'opposé de la lame 10. Ils peuvent être placés aux sommets de triangles, et/ou aux sommets d'hexagones. Les groupes d'entrées peuvent chacun comprendre six guide-bandes rétractables 20.The entry gap guides the strip when it enters the tool. It may comprise two symmetrical groups of retractable strip guides 20. They are opposite blade 10. They may be placed at the vertices of triangles, and/or at the vertices of hexagons. The input groups can each include six retractable web guides 20.

Le jeu central est au milieu longitudinalement de la partie inférieure 2. Il peut comprendre des nombres sensiblement égaux de guide-bandes rétractables 20 de chaque côté de l'axe médian 12. Une matrice d'ajourage 14 peut être placée entre deux guide-bandes rétractables 20. Au moins une ou chaque matrice de bord 16 peut être placée entre la lame 10 et un des guide-bandes rétractables 20, et éventuellement dans l'alignement dudit guide-bande rétractable 20. Cet alignement permet de supprimer la dent qui pourrait être taillée sur le flan.The central clearance is in the middle longitudinally of the lower part 2. It can comprise substantially equal numbers of retractable strip guides 20 on each side of the central axis 12. A perforating matrix 14 can be placed between two strip guides retractable strips 20. At least one or each edge die 16 can be placed between the blade 10 and one of the retractable strip guides 20, and possibly in alignment with said retractable strip guide 20. This alignment makes it possible to eliminate the tooth which could be cut on the blank.

De manière générale, chaque guide-bande rétractable 20 d'un groupe est associé à autre guide-bande rétractable 20 d'un autre groupe du même jeu, lesdits guide-bandes rétractables 20 étant équidistant par rapport à l'axe médian 12. La majorité ou tous les guide-bandes rétractables 20 forment des paires de guide-bandes rétractables 20 équidistant de l'axe médian 12.In general, each retractable tape guide 20 of a group is associated with another retractable tape guide 20 of another group of the same set, said retractable tape guides 20 being equidistant with respect to the central axis 12. majority or all of the retractable web guides 20 form pairs of retractable web guides 20 equidistant from the central axis 12.

La figure 2 représente une coupe de l'outil d'emboutissage en configuration ouverte. La partie inférieure 2 correspond à celle de la figure 1. Bien qu'un seul guide-bande rétractable 20 ne soit représenté, l'enseignement qui suit peut s'appliquer à chaque guide-bande rétractable 20.There picture 2 shows a section of the stamping tool in the open configuration. The lower part 2 corresponds to that of the figure 1 . Although only one retractable web guide 20 is shown, the following teaching can be applied to each retractable web guide 20.

La partie inférieure 2 est apte à coopérer avec la partie supérieure 22 de l'outil d'emboutissage. La partie supérieure 22 peut être un bâti supérieur. Elle peut comprendre une lame complémentaire (non représentée) de celle de la partie inférieure 2. Ces parties (2 ; 22) sont destinées à être montées sur une presse d'emboutissage (non représentée) pour mettre en forme la tôle 24 disposée entre elles. L'outil est adapté pour des tôles en acier d'épaisseurs comprises entre 0,65mm et 1,5mm. L'aluminium est également envisageable. La partie supérieure 22 est représenté à distance de la partie inférieure 2 ce qui permet le glissement de la tôle 24 sur les moyens de glissement 8. Un guide-bande fixe 18 est représenté en arrière-plan.The lower part 2 is able to cooperate with the upper part 22 of the stamping tool. Top 22 may be a top frame. It may include a complementary blade (not shown) to that of the lower part 2. These parts (2; 22) are intended to be mounted on a stamping press (not shown) to shape the sheet 24 placed between them. . The tool is suitable for steel sheets with thicknesses between 0.65mm and 1.5mm. Aluminum is also possible. The upper part 22 is shown at a distance from the lower part 2 which allows the sliding of the sheet 24 on the sliding means 8. A fixed strip guide 18 is shown in the background.

Un guide-bande rétractable 20 est représenté en position rétractée à l'aide d'un trait plein, et à l'aide d'un trait pointillé pour la position déployée. Un logement 26 formé dans la partie inférieure 2 contient totalement le guide-bande rétractable 20 lorsqu'il est rétracté. La partie inférieure 2 comprend un actionneur 28 électrique ou pneumatique permettant de monter et descendre le guide-bande rétractable 20. Un actionneur 28 peut être prévu pour chaque guide-bande rétractable 20 de manière à le piloter de manière indépendante. Le guide-bande rétractable 20 peut comprendre un rouleau adapté pour rouler contre la tranche de la tôle 24 afin de réduire le frottement.A retractable tape guide 20 is shown in the retracted position using a solid line, and using a dotted line for the deployed position. A housing 26 formed in the lower part 2 completely contains the retractable tape guide 20 when it is retracted. The lower part 2 comprises an electric or pneumatic actuator 28 making it possible to raise and lower the retractable strip guide 20. An actuator 28 can be provided for each retractable strip guide 20 so as to drive it independently. Retractable web guide 20 may include a roller adapted to roll against the edge of sheet metal 24 to reduce friction.

L'outil d'emboutissage peut être conçu de manière à être fermé tandis que le guide-bande rétractable 20 est déployé. Toutefois, en position fermée la partie supérieure 22 reste à distance du guide-bande rétractable 20. À cet effet la partie supérieure 22 peut présenter une surface inférieure 30 restant écartée du guide-bande rétractable 20, malgré le rapprochement de la partie inférieure 2. L'écartement vertical entre la surface inférieure 30 et le sommet du guide-bande rétractable 20 peut être d'au moins 10mm, ou au moins 20 en position fermée. La surface inférieure 30 peut être généralement plane et/ou continue. Elle peut recouvrir plusieurs guide-bandes rétractables 20 et/ou au moins un guide-bande fixe 18.The stamping tool can be designed to be closed while the retractable web guide 20 is extended. However, in the closed position the upper part 22 remains at a distance from the retractable strip guide 20. For this purpose the upper part 22 may have a lower surface 30 remaining spaced from the retractable strip guide 20, despite the bringing together of the lower part 2. The vertical spacing between the lower surface 30 and the top of the retractable web guide 20 can be at least 10 mm, or at least 20 in the closed position. Bottom surface 30 can be generally planar and/or continuous. It can cover several retractable strip guides 20 and/or at least one fixed strip guide 18.

La présente invention a été détaillée en relation avec la partie inférieure 2 d'outil d'emboutissage. Toutefois, dans une variante non revendiquée, le présent enseignement peut se décliner pour la partie supérieure.The present invention has been detailed in relation to the lower part 2 of the stamping tool. However, in an unclaimed variant, this teaching can be applied to the upper part.

Dans une variante non revendiquée, l'écart transversal entre les guide-bandes les plus éloignés, notamment les guide-bandes rétractables les plus éloignés, dépasse d'au moins 10%, ou 20% ou 40% l'écart transversal entre les guide-bandes les moins éloignés.In an unclaimed variant, the transverse gap between the furthest strip guides, in particular the furthest retractable strip guides, exceeds by at least 10%, or 20% or 40% the transverse gap between the guides -bands less distant.

Dans une variante non revendiquée, l'outil d'emboutissage sur presse d'emboutissage, comprend une partie supérieure et une partie inférieure adaptées pour découper une tôle entre elles lors de la fermeture de l'outil, la partie inférieure étant conforme à l'invention, la partie supérieure présentant une surface inférieure en regard et à distance du guide-bande rétractable lorsque l'outil est fermé.In a variant not claimed, the stamping tool on a stamping press comprises an upper part and a lower part suitable for cutting a sheet between them when the tool is closed, the lower part being in accordance with invention, the upper part presenting a lower surface opposite and at a distance from the retractable tape guide when the tool is closed.

Dans une variante non revendiquée, les moyens de glissement 8 peuvent être des brosses sur lesquelles glisse la tôle lors de son avancement pas à pas.In an unclaimed variant, the sliding means 8 can be brushes on which the sheet slides as it advances step by step.

Claims (9)

  1. Lower part (2) of tool for cutting flans from a sheet strip (24), including a sheet coil (24), the lower part (2) comprising:
    - an advance zone (4) of sheet strip (24) with a top surface (6),
    - a blade (10) for cutting flans from the sheet strip (24), the said blade (10) being arranged at the top surface (6), and
    - at least one retractable band guide (20) below the top surface (6) which is at least partially disposed of in the advance area (4),
    characterized by having at least one matrix (16) forming an opening that is placed in the alignment of at least one retractable band guide (20) according to the direction of advancement of the sheet metal band (24).
  2. Lower part (2) according to Claim 1, characterized as it includes means of actuation (28) to move the retractable band guide(s) (20) between a retracts position below the upper surface (6) and a protruding position relative to the upper surface (6).
  3. Lower part (2) according to one of the claims 1 to 2, characterized by that the advance area (4) includes means of sliding (8), including brushes, which are distributed over the advance area (4), with at least one retractable band guide (20) arranged between two means of sliding (8).
  4. Lower part (2) according to one of the claims 1 to 3, characterized as the blade (10) is a transverse blade, with at least one retractable strip guide (20) placed on the lower (2) tool part opposite the said transverse blade.
  5. Lower part (2) according to one of the claims 1 to 4, characterized in addition by band guides (18) whose height is fixed in relation to the upper surface (6), the said fixed band guides (18) demarcating the advancement area (4).
  6. Lower part (2) according to one of the claims 1 to 5, characterized as the retractable band guide (20) is a first retractable band guide (20), the lower part (2) also includes a second retractable band guide (20) below the upper surface (6) which is at least partially disposed in the advance area (4), and disposed between the first guide retractable band (20) and blade (10).
  7. Lower part (2) according to claim 6, characterized as the retractable band guide (20) is a first retractable band guide (20), the advance area (4) also includes a third retractable band guide (20) below the upper surface (6) which is at least partially disposed in the advance area (4), and disposed transverse opposite the first retractable band guide (20).
  8. Lower part (2) according to claim 7, characterized as it includes a plurality of retractable strips guide (20) under the upper surface (6) which are at least partially arranged in the advance area (4), the said retractable strips guide (20) being possibly arranged symmetrically.
  9. Tool for stamping press, the tool comprising a top part (22) and a bottom part (2) suitable for cutting a sheet (24) between them when the tool is closed, characterized that the bottom part (2) conforms to one of the claims 1 to 8, the top part having a lower surface (30) facing and distance retractable band guide (20) when the tool is closed.
EP17155165.8A 2016-03-15 2017-02-08 Stamping tool for motor vehicle blank Active EP3219405B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1652173A FR3048900B1 (en) 2016-03-15 2016-03-15 EMBOSSING TOOL FOR MOTOR VEHICLE FLAN

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EP3219405A1 EP3219405A1 (en) 2017-09-20
EP3219405B1 true EP3219405B1 (en) 2023-09-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5604044A (en) 1992-12-28 1997-02-18 Mccabe; Charles J. Blanks for sheet material forming process
JP2007160358A (en) * 2005-12-14 2007-06-28 Mitsui High Tec Inc Progressive die device
JP4867381B2 (en) * 2006-02-14 2012-02-01 トヨタ紡織株式会社 Positioning mechanism of progressive press machine
FR3019071B1 (en) * 2014-03-26 2016-03-25 Peugeot Citroen Automobiles Sa OPERATING DIFFERENT BANDWIDTHS ON A TOOL PRESS TO BE FOLLOWED
WO2016016400A1 (en) * 2014-08-01 2016-02-04 Cosma S.R.L. Sheet-metal punching machine

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EP3219405A1 (en) 2017-09-20
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