EP3548198B1 - Press equipment for forming a collar by trimming - Google Patents

Press equipment for forming a collar by trimming Download PDF

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Publication number
EP3548198B1
EP3548198B1 EP17808553.6A EP17808553A EP3548198B1 EP 3548198 B1 EP3548198 B1 EP 3548198B1 EP 17808553 A EP17808553 A EP 17808553A EP 3548198 B1 EP3548198 B1 EP 3548198B1
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EP
European Patent Office
Prior art keywords
sheet metal
metal blank
forming
collar
around
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Active
Application number
EP17808553.6A
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German (de)
French (fr)
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EP3548198A1 (en
Inventor
Thierry AESCHLIMANN
Jean Luc BRUN
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.)
PSA Automobiles SA
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PSA Automobiles SA
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Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3548198A1 publication Critical patent/EP3548198A1/en
Application granted granted Critical
Publication of EP3548198B1 publication Critical patent/EP3548198B1/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/04—Stamping using rigid devices or tools for dimpling
    • 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
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/088—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for flanging holes
    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts

Definitions

  • the invention relates to the field of forming collars on sheet metal blanks by stamping.
  • the formation of a collar around an orifice of a sheet metal blank is generally carried out by means of a stamping tool comprising a punch mounted on a lower frame of a press.
  • the formation of the collar is then carried out by moving the sheet blank downwards in the direction of the punch or by means of a cam system configured to move the punch upwards in the direction of the sheet blank, during a movement of lowering of the upper frame.
  • the published patent document US 5,069,051 discloses a stamping tool for producing a threaded collar.
  • the collar is previously formed in four stages on a sheet metal blank.
  • the collar is then placed on a tool receiving surface.
  • the tooling includes an upper die with a recess configured to laterally compress the collar and a threaded rod located on a lower portion of the tool, facing the collar.
  • the receiving surface including the collar is driven down and the recess will cover the collar.
  • the collar translates along the threaded rod which is found above the collar. When the collar is raised, the rod will thread the internal surface of said collar.
  • the published patent document DE 10 2008 031 050 A1 discloses a method of forming a collar on a stamped part.
  • the collar is produced in several stages on a cutting line type tool.
  • the method comprises eight steps, namely in particular a step of embossing the stamped part carried out in three steps so as to obtain a dome shape.
  • a punching step is then performed so as to form a hole in the dome shape.
  • the dome shape is then deformed in several stages so as to obtain the expected neck.
  • a thread is then made inside the collar.
  • the aforementioned state of the art snare forming methods include several steps for collar forming, thereby complicating the collar forming process.
  • the object of the invention is to overcome at least one of the drawbacks of the above-mentioned state of the art. More particularly, the object of the invention is to provide a tool for a stamping press allowing the production of collars in a simplified manner. The invention also aims to provide an economical and robust solution.
  • the invention relates to a tool for shaping, on a stamping press, a collar on a sheet metal blank provided with an orifice, the tool comprising a lower part forming a surface for receiving the blank of sheet metal; an upper part suitable for pressing the sheet metal blank against the receiving surface; a punch capable of forming the collar around the orifice; remarkable in that the punch is an integral part of the receiving surface, said surface forming a cup around said punch allowing a portion of the sheet metal blank, located around the orifice, to undergo a downward movement during pressing by the the top part.
  • the punch is fixed with respect to the lower part, advantageously integral with said part.
  • the surface for receiving the sheet blank comprises an annular portion around the cup, said portion being at a height greater than or equal to the height of the punch.
  • the upper part of said tool comprises a blade configured to press the portion of the sheet metal blank located around the orifice, in the cup, around the punch.
  • the blade comprises a contact surface with the sheet metal blank, having a projecting profile describing a circle, able to penetrate the bowl and forming a central cavity able to receive the punch.
  • the upper part of said tool comprises a blank holder arranged on the periphery of the blade, said blank holder being configured to press the sheet metal blank against the receiving surface laterally to the cup.
  • the receiving surface of the sheet blank has, outside the annular portion around the cup, a non-rectilinear profile cooperating with the blank holder.
  • the bowl is a first bowl, the non-rectilinear profile cooperating with the blank holder forming a second bowl surrounding the first bowl.
  • the bowl has a lateral surface inclined at an angle of between 40 ° and 55 ° relative to a horizontal plane.
  • the subject of the invention is also a method for forming a sheet metal blank comprising the following steps: stamping of the sheet metal blank, forming an orifice on the sheet blank, forming a collar around the orifice; remarkable in that the step of forming the collar is carried out by means of a tool according to the invention.
  • the punch has a diameter greater than the orifice of the sheet blank.
  • the measures of the invention are advantageous in that they make it possible to simplify the process for forming a collar on a sheet metal blank provided with an orifice.
  • the receiving surface of the sheet blank located on the lower part of the tool of the invention, forms a cup around the punch thus making it possible to form a collar around the punch in the direction of movement of the press, that is, vertically downwards.
  • the invention makes it possible to form the collar in a single press stroke and also makes it possible to dispense with cam motion transmission systems.
  • the presence of a cup around the punch will make it possible to obtain a specific shape on the sheet metal blank, around the collar, which will also make it possible to reinforce the rigidity of the sheet metal blank. The time and costs of producing the collars are reduced.
  • the figure 1 shows a tool 2 for shaping a collar on a sheet metal blank 4, according to the invention and the figure 2 represents an enlarged portion of the tooling of the figure 1 .
  • Tooling 2 is used on a stamping press.
  • the tool 2 comprises a lower part 6 forming a receiving surface 8 of the sheet metal blank 4 and an upper part 10 able to press the sheet metal blank 4 against the receiving surface 8.
  • the upper part 10 is configured to move in. the direction of work of the press, that is to say downwards.
  • the sheet metal blank 4 has previously undergone a stamping step followed by a step of punching an orifice 12 on the sheet metal blank 4.
  • the orifice 12 is shown in dotted lines on the left. figure 2 .
  • the stamped sheet blank 4 as shown in figures 1 and 2 presents a specific form of stamping which is not limiting of the invention.
  • Tool 2 also includes a punch 14 for forming the collar (not visible).
  • the punch 14 of the tool 2 forms an integral part of the receiving surface 8 of the sheet blank.
  • the receiving surface 8 of the sheet metal blank 4 has the particularity of forming a cup 16 around the punch 14.
  • the cup 16 is preferably circular.
  • the bowl 16 makes it possible to subject a downward movement to a portion 18 of the sheet metal blank located around the orifice 12 of the sheet metal blank 4 ( figure 2 ), when pressing the upper part 10 of the tool 2.
  • the sheet metal blank 4 is placed on the receiving surface 8 of the sheet metal blank so as to have the orifice 12 of the sheet metal blank above the punch 14.
  • the punch 14 has a diameter greater than the diameter of the orifice 12. so as to allow extrusion of the collar.
  • the upper part 10 of the tool 2 comprises a blade 20 configured to press the portion 18 of the sheet metal blank 4 located around the orifice 12, in the cup 16, around the punch 14. More particularly, the blade 20 comprises a contact surface 21 with the sheet metal blank 4 which has a projecting profile describing a circle and which is able to penetrate the bowl 16.
  • the contact surface 21 of the blade with the blank 4 also forms a central cavity suitable for receiving the punch 14.
  • the upper part 10 comprises a blank holder 22 arranged around the periphery of the blade 20.
  • the blank holder 22 will hold the sheet metal blank 4 before the action of the blade 20.
  • the receiving surface 8 comprises an annular portion 24 around the cup 16.
  • the annular portion 24 is at a height greater than or equal to the height of the punch 14.
  • the annular portion 24 is at a height greater than the height of the punch. 14. More preferably, the annular portion 24 and the punch has a height difference of between 1.5 and 3 mm.
  • the bowl 16 has a larger diameter and a smaller diameter, the smaller diameter preferably being 1.5 times smaller than the larger diameter.
  • the upper and lower diameters are respectively related to the working direction of the press, that is to say from top to bottom.
  • the bowl 16 has a lateral surface 26 inclined at an angle of between 40 and 55 ° relative to a horizontal plane.
  • the cup 16 also has a bottom 28 with a width around the punch 14 of between 4 and 6 mm.
  • the receiving surface 8 of the sheet blank has, outside the annular portion 24, a non-rectilinear profile.
  • the non-rectilinear profile cooperates with the blank holder 22.
  • the non-rectilinear profile which cooperates with the blank holder forms a second bowl 30 which surrounds the first bowl 16.
  • the figure 3 represents tool 2 of the figure 1 in a step of forming the neck.
  • the blade 20 is lowered against the sheet metal blank 4 so as to press the sheet metal blank within the cup 16.
  • the contact surface 21 of the blade 20 presses the portion of the sheet metal blank around the orifice, within the cup 16 and around the punch 14, thus allowing the formation of a collar 32 around the orifice.
  • the collar 32 is directed upwards.
  • the figure 4 illustrates a top view of the sheet metal blank 4 after formation of the collar 32 around the orifice 12.
  • the sheet metal blank 4 comprises a shape 34 around the collar 32 due to the presence of the cup on the tool of the invention .
  • the form 34 has the advantage of reinforcing the rigidity of the sheet metal blank.
  • the tool and the method of the invention can for example be used for forming a collar on a sheet blank for blocking a motor vehicle hood strut, said strut being configured to hold the hood in position. opened.

Description

L'invention a trait au domaine de la mise à forme de collets sur flans de tôle par emboutissage.The invention relates to the field of forming collars on sheet metal blanks by stamping.

La formation d'un collet autour d'un orifice d'un flan de tôle est généralement réalisée au moyen d'un outillage d'emboutissage comprenant un poinçon monté sur un bâti inférieur d'une presse. La formation du collet est alors réalisée en déplaçant le flan de tôle vers le bas en direction du poinçon ou au moyen d'un système de cames configuré pour déplacer le poinçon vers le haut en direction du flan de tôle, lors d'un mouvement de descente du bâti supérieur.The formation of a collar around an orifice of a sheet metal blank is generally carried out by means of a stamping tool comprising a punch mounted on a lower frame of a press. The formation of the collar is then carried out by moving the sheet blank downwards in the direction of the punch or by means of a cam system configured to move the punch upwards in the direction of the sheet blank, during a movement of lowering of the upper frame.

Cependant, ces outillages d'emboutissage nécessitent l'utilisation de systèmes pour le déplacement du poinçon vers le haut ou pour le déplacement du flan de tôle vers le bas, ce qui rend complexe l'outillage et augmente les coûts de fabrication des collets.However, these stamping tools require the use of systems for moving the punch upwards or for moving the sheet blank downwards, which complicates the tooling and increases the manufacturing costs of the collars.

Le document de brevet publié US 5,069,051 divulgue un outillage d'emboutissage pour la réalisation d'un collet taraudé. Le collet est préalablement formé en quatre étapes sur un flan de tôle. Le collet est ensuite placé sur une surface de réception de l'outillage. L'outillage comprend une matrice supérieure avec un évidement configuré pour compresser latéralement le collet et une tige filetée située sur une partie inférieure de l'outillage, en vis-à-vis du collet. Lorsque la matrice supérieure descend, la surface de réception comprenant le collet est entrainée vers le bas et l'évidement va recouvrir le collet. Le collet translate le long de la tige filetée qui se retrouve au-dessus du collet. Lors de la remontée du collet, la tige va fileter la surface interne dudit collet.The published patent document US 5,069,051 discloses a stamping tool for producing a threaded collar. The collar is previously formed in four stages on a sheet metal blank. The collar is then placed on a tool receiving surface. The tooling includes an upper die with a recess configured to laterally compress the collar and a threaded rod located on a lower portion of the tool, facing the collar. As the upper die descends, the receiving surface including the collar is driven down and the recess will cover the collar. The collar translates along the threaded rod which is found above the collar. When the collar is raised, the rod will thread the internal surface of said collar.

Le document de brevet publié DE 10 2008 031 050 A1 divulgue un procédé de formation d'un collet sur une pièce emboutie. Le collet est réalisé en plusieurs étapes sur un outil de type ligne de découpe. Le procédé comprend huit étapes à savoir notamment une étape de gaufrage de la pièce emboutie réalisée en trois étapes de manière à obtenir une forme en dôme. Une étape de poinçonnage est ensuite réalisée de manière à former un trou dans la forme en dôme. La forme en dôme est ensuite déformée en plusieurs étapes de manière à obtenir le collet escompté. Un filetage est ensuite réalisé à l'intérieur du collet.The published patent document DE 10 2008 031 050 A1 discloses a method of forming a collar on a stamped part. The collar is produced in several stages on a cutting line type tool. The method comprises eight steps, namely in particular a step of embossing the stamped part carried out in three steps so as to obtain a dome shape. A punching step is then performed so as to form a hole in the dome shape. The dome shape is then deformed in several stages so as to obtain the expected neck. A thread is then made inside the collar.

Le document de brevet publié US 2013/316 132 A1 divulgue un outillage et un procédé de formation d'un produit de presse, selon le préambule de la revendication 1.The published patent document US 2013/316 132 A1 discloses tooling and a method of forming a press product according to the preamble of claim 1.

Les procédés de formation des collets de l'état de l'art susmentionné comprennent plusieurs étapes pour la formation du collet, rendant ainsi complexe le procédé de formation du collet.The aforementioned state of the art snare forming methods include several steps for collar forming, thereby complicating the collar forming process.

L'invention a pour objectif de pallier au moins un des inconvénients de l'état de la technique susmentionné. Plus particulièrement, l'invention a pour objectif de fournir un outillage pour presse d'emboutissage permettant la réalisation de collets de manière simplifiée. L'invention a également pour objectif de fournir une solution économique et robuste.The object of the invention is to overcome at least one of the drawbacks of the above-mentioned state of the art. More particularly, the object of the invention is to provide a tool for a stamping press allowing the production of collars in a simplified manner. The invention also aims to provide an economical and robust solution.

L'invention a pour objet un outillage de mise à forme, sur une presse d'emboutissage, d'un collet sur un flan de tôle pourvu d'un orifice, l'outillage comprenant une partie inférieure formant une surface de réception du flan de tôle ;
une partie supérieure apte à presser le flan de tôle contre la surface de réception ; un poinçon apte à former le collet autour de l'orifice ; remarquable en ce que le poinçon fait partie intégrante de la surface de réception, ladite surface formant une cuvette autour dudit poinçon permettant à une portion du flan de tôle, située autour de l'orifice, de subir un mouvement de descente lors du pressage par la partie supérieure.The invention relates to a tool for shaping, on a stamping press, a collar on a sheet metal blank provided with an orifice, the tool comprising a lower part forming a surface for receiving the blank of sheet metal;
an upper part suitable for pressing the sheet metal blank against the receiving surface; a punch capable of forming the collar around the orifice; remarkable in that the punch is an integral part of the receiving surface, said surface forming a cup around said punch allowing a portion of the sheet metal blank, located around the orifice, to undergo a downward movement during pressing by the the top part.

En faisant partie intégrante de la surface de réception, le poinçon est fixe par rapport à la partie inférieure, avantageusement venu de matière avec ladite partie.By forming an integral part of the receiving surface, the punch is fixed with respect to the lower part, advantageously integral with said part.

Selon un mode avantageux de l'invention, la surface de réception du flan de tôle comprend une portion annulaire autour de la cuvette, ladite portion étant à une hauteur supérieure ou égale à la hauteur du poinçon.According to an advantageous embodiment of the invention, the surface for receiving the sheet blank comprises an annular portion around the cup, said portion being at a height greater than or equal to the height of the punch.

Selon un mode avantageux de l'invention, la partie supérieure dudit outillage comprend une lame configurée pour presser la portion du flan de tôle située autour de l'orifice, dans la cuvette, autour du poinçon.According to an advantageous embodiment of the invention, the upper part of said tool comprises a blade configured to press the portion of the sheet metal blank located around the orifice, in the cup, around the punch.

Selon un mode avantageux de l'invention, la lame comprend une surface de contact avec le flan de tôle, présentant un profil en saillie décrivant un cercle, apte à pénétrer la cuvette et formant une cavité centrale apte à recevoir le poinçon.According to an advantageous embodiment of the invention, the blade comprises a contact surface with the sheet metal blank, having a projecting profile describing a circle, able to penetrate the bowl and forming a central cavity able to receive the punch.

Selon un mode avantageux de l'invention, la partie supérieure dudit outillage comprend un serre-flan disposé sur le pourtour de la lame, ledit serre-flan étant configuré pour presser le flan de tôle contre la surface de réception latéralement à la cuvette.According to an advantageous embodiment of the invention, the upper part of said tool comprises a blank holder arranged on the periphery of the blade, said blank holder being configured to press the sheet metal blank against the receiving surface laterally to the cup.

Selon un mode avantageux de l'invention, la surface de réception du flan de tôle présente, à l'extérieur de la portion annulaire autour de la cuvette, un profil non-rectiligne coopérant avec le serre-flan.According to an advantageous embodiment of the invention, the receiving surface of the sheet blank has, outside the annular portion around the cup, a non-rectilinear profile cooperating with the blank holder.

Selon un mode avantageux de l'invention, la cuvette est une première cuvette, le profil non-rectiligne coopérant avec le serre-flan formant une deuxième cuvette entourant la première cuvette.According to an advantageous embodiment of the invention, the bowl is a first bowl, the non-rectilinear profile cooperating with the blank holder forming a second bowl surrounding the first bowl.

Selon un mode avantageux de l'invention, la cuvette présente une surface latérale inclinée selon un angle compris entre 40° et 55° par rapport à un plan horizontal.According to an advantageous embodiment of the invention, the bowl has a lateral surface inclined at an angle of between 40 ° and 55 ° relative to a horizontal plane.

L'invention a également pour objet un procédé de mise à forme d'un flan de tôle comprenant les étapes suivantes : emboutissage du flan de tôle, formation d'un orifice sur le flan de tôle, formation d'un collet autour de l'orifice ; remarquable en ce que l'étape de formation du collet est réalisée au moyen d'un outillage conforme à l'invention.The subject of the invention is also a method for forming a sheet metal blank comprising the following steps: stamping of the sheet metal blank, forming an orifice on the sheet blank, forming a collar around the orifice; remarkable in that the step of forming the collar is carried out by means of a tool according to the invention.

Selon un mode avantageux de l'invention, le poinçon a un diamètre supérieur à l'orifice du flan de tôle.According to an advantageous embodiment of the invention, the punch has a diameter greater than the orifice of the sheet blank.

Les mesures de l'invention sont intéressantes en ce que celles-ci permettent de simplifier le procédé de formation d'un collet sur un flan de tôle pourvu d'un orifice. En effet, la surface de réception du flan de tôle, située sur la partie inférieure de l'outillage de l'invention, forme une cuvette autour du poinçon permettant ainsi de former un collet autour du poinçon dans le sens de déplacement de la presse, c'est-à-dire verticalement vers le bas. L'invention permet de former le collet en un seul coup de presse et permet également de s'affranchir de systèmes de transmission de mouvement à cames. De plus, la présence d'une cuvette autour du poinçon va permettre l'obtention d'une forme spécifique sur le flan de tôle, autour du collet, ce qui va également permettre de renforcer la rigidité du flan de tôle. Le temps et les coûts de réalisation des collets diminuent.The measures of the invention are advantageous in that they make it possible to simplify the process for forming a collar on a sheet metal blank provided with an orifice. Indeed, the receiving surface of the sheet blank, located on the lower part of the tool of the invention, forms a cup around the punch thus making it possible to form a collar around the punch in the direction of movement of the press, that is, vertically downwards. The invention makes it possible to form the collar in a single press stroke and also makes it possible to dispense with cam motion transmission systems. In addition, the presence of a cup around the punch will make it possible to obtain a specific shape on the sheet metal blank, around the collar, which will also make it possible to reinforce the rigidity of the sheet metal blank. The time and costs of producing the collars are reduced.

D'autres caractéristiques et avantages de la présente invention seront mieux compris à l'aide de la description et des dessins parmi lesquels :

  • La figure 1 représente un outillage de mise à forme d'un collet sur un flan de tôle, conformément à l'invention ;
  • La figure 2 représente une portion agrandie de la surface de réception du flan de tôle de l'outillage de la figure 1.
  • La figure 3 représente l'outillage de la figure 1 dans une étape de formation d'un collet.
  • La figure 4 représente une portion de flan de tôle présentant un collet formé au moyen de l'outillage des figures 1 et 3.
Other characteristics and advantages of the present invention will be better understood with the aid of the description and the drawings, among which:
  • The figure 1 represents a tool for shaping a collar on a sheet metal blank, in accordance with the invention;
  • The figure 2 represents an enlarged portion of the receiving surface of the sheet metal blank of the tooling of the figure 1 .
  • The figure 3 represents the tools of the figure 1 in a step of forming a collar.
  • The figure 4 represents a portion of sheet metal blank having a collar formed by means of the tooling of figures 1 and 3 .

La figure 1 représente un outillage 2 de mise à forme d'un collet sur un flan de tôle 4, selon l'invention et la figure 2 représente une portion agrandie de l'outillage de la figure 1. L'outillage 2 est utilisé sur une presse d'emboutissage. L'outillage 2 comprend une partie inférieure 6 formant une surface de réception 8 du flan de tôle 4 et une partie supérieure 10 apte à presser le flan de tôle 4 contre la surface de réception 8. La partie supérieure 10 est configurée pour se déplacer dans le sens de travail de la presse c'est-à-dire vers le bas. Le flan de tôle 4 a préalablement subi une étape d'emboutissage suivie d'une étape de poinçonnage d'un orifice 12 sur le flan de tôle 4. L'orifice 12 est représenté en pointillé à la figure 2. Le flan de tôle 4 embouti tel qu'illustré aux figures 1 et 2 présente une forme d'emboutissage spécifique qui n'est pas limitative de l'invention.The figure 1 shows a tool 2 for shaping a collar on a sheet metal blank 4, according to the invention and the figure 2 represents an enlarged portion of the tooling of the figure 1 . Tooling 2 is used on a stamping press. The tool 2 comprises a lower part 6 forming a receiving surface 8 of the sheet metal blank 4 and an upper part 10 able to press the sheet metal blank 4 against the receiving surface 8. The upper part 10 is configured to move in. the direction of work of the press, that is to say downwards. The sheet metal blank 4 has previously undergone a stamping step followed by a step of punching an orifice 12 on the sheet metal blank 4. The orifice 12 is shown in dotted lines on the left. figure 2 . The stamped sheet blank 4 as shown in figures 1 and 2 presents a specific form of stamping which is not limiting of the invention.

L'outillage 2 comprend également un poinçon 14 pour la formation du collet (non visible). Le poinçon 14 de l'outillage 2 fait partie intégrante de la surface de réception 8 du flan de tôle. La surface de réception 8 du flan de tôle 4 a la particularité de former une cuvette 16 autour du poinçon 14. La cuvette 16 est préférentiellement circulaire. La cuvette 16 permet de faire subir un mouvement de descente à une portion 18 du flan de tôle située autour de l'orifice 12 du flan de tôle 4 (figure 2), lors du pressage de la partie supérieure 10 de l'outillage 2.Tool 2 also includes a punch 14 for forming the collar (not visible). The punch 14 of the tool 2 forms an integral part of the receiving surface 8 of the sheet blank. The receiving surface 8 of the sheet metal blank 4 has the particularity of forming a cup 16 around the punch 14. The cup 16 is preferably circular. The bowl 16 makes it possible to subject a downward movement to a portion 18 of the sheet metal blank located around the orifice 12 of the sheet metal blank 4 ( figure 2 ), when pressing the upper part 10 of the tool 2.

Le flan de tôle 4 est placé sur la surface de réception 8 du flan de tôle de manière à disposer l'orifice 12 du flan de tôle au-dessus du poinçon 14. Le poinçon 14 a un diamètre supérieur au diamètre de l'orifice 12 de manière à permettre l'extrusion du collet. La partie supérieure 10 de l'outillage 2 comprend une lame 20 configurée pour presser la portion 18 du flan de tôle 4 située autour de l'orifice 12, dans la cuvette 16, autour du poinçon 14. Plus particulièrement, la lame 20 comprend une surface de contact 21 avec le flan de tôle 4 qui présente un profil en saillie décrivant un cercle et qui est apte à pénétrer la cuvette 16. La surface de contact 21 de la lame avec le flan 4 forme également une cavité centrale apte à recevoir le poinçon 14.The sheet metal blank 4 is placed on the receiving surface 8 of the sheet metal blank so as to have the orifice 12 of the sheet metal blank above the punch 14. The punch 14 has a diameter greater than the diameter of the orifice 12. so as to allow extrusion of the collar. The upper part 10 of the tool 2 comprises a blade 20 configured to press the portion 18 of the sheet metal blank 4 located around the orifice 12, in the cup 16, around the punch 14. More particularly, the blade 20 comprises a contact surface 21 with the sheet metal blank 4 which has a projecting profile describing a circle and which is able to penetrate the bowl 16. The contact surface 21 of the blade with the blank 4 also forms a central cavity suitable for receiving the punch 14.

La partie supérieure 10 comprend un serre-flan 22 disposé sur le pourtour de la lame 20. Le serre-flan 22 va maintenir le flan de tôle 4 avant l'action de la lame 20.The upper part 10 comprises a blank holder 22 arranged around the periphery of the blade 20. The blank holder 22 will hold the sheet metal blank 4 before the action of the blade 20.

La surface de réception 8 comprend une portion annulaire 24 autour de la cuvette 16. La portion annulaire 24 est à une hauteur supérieure ou égale à la hauteur du poinçon 14. Préférentiellement, la portion annulaire 24 est à une hauteur supérieure à la hauteur du poinçon 14. Plus préférentiellement, la portion annulaire 24 et le poinçon présente une différence de hauteur comprise entre 1,5 et 3 mm.The receiving surface 8 comprises an annular portion 24 around the cup 16. The annular portion 24 is at a height greater than or equal to the height of the punch 14. Preferably, the annular portion 24 is at a height greater than the height of the punch. 14. More preferably, the annular portion 24 and the punch has a height difference of between 1.5 and 3 mm.

La cuvette 16 présente un diamètre supérieur et un diamètre inférieur, le diamètre inférieur étant préférentiellement 1,5 fois inférieur au diamètre supérieur. Les diamètres supérieur et inférieur sont respectivement en relation avec la direction de travail de la presse c'est-à-dire de haut en bas. La cuvette 16 présente une surface latérale 26 inclinée selon un angle compris entre 40 et 55° par rapport à un plan horizontal. La cuvette 16 a également un fond 28 avec une largeur autour du poinçon 14 comprise entre 4 et 6 mm.The bowl 16 has a larger diameter and a smaller diameter, the smaller diameter preferably being 1.5 times smaller than the larger diameter. The upper and lower diameters are respectively related to the working direction of the press, that is to say from top to bottom. The bowl 16 has a lateral surface 26 inclined at an angle of between 40 and 55 ° relative to a horizontal plane. The cup 16 also has a bottom 28 with a width around the punch 14 of between 4 and 6 mm.

Selon un mode avantageux de l'invention, la surface de réception 8 du flan de tôle présente, à l'extérieur de la portion annulaire 24, un profil non-rectiligne. Le profil non-rectiligne coopère avec le serre-flan 22. Avantageusement, le profil non-rectiligne qui coopère avec le serre-flan forme une deuxième cuvette 30 qui entoure la première cuvette 16.According to an advantageous embodiment of the invention, the receiving surface 8 of the sheet blank has, outside the annular portion 24, a non-rectilinear profile. The non-rectilinear profile cooperates with the blank holder 22. Advantageously, the non-rectilinear profile which cooperates with the blank holder forms a second bowl 30 which surrounds the first bowl 16.

La figure 3 représente l'outillage 2 de la figure 1 dans une étape de formation du collet. La lame 20 est descendue contre le flan de tôle 4 de manière à presser le flan de tôle au sein de la cuvette 16. La surface de contact 21 de la lame 20 presse la portion du flan de tôle autour de l'orifice, au sein de la cuvette 16 et autour du poinçon 14, permettant ainsi la formation d'un collet 32 autour de l'orifice. Le collet 32 est dirigé vers le haut.The figure 3 represents tool 2 of the figure 1 in a step of forming the neck. The blade 20 is lowered against the sheet metal blank 4 so as to press the sheet metal blank within the cup 16. The contact surface 21 of the blade 20 presses the portion of the sheet metal blank around the orifice, within the cup 16 and around the punch 14, thus allowing the formation of a collar 32 around the orifice. The collar 32 is directed upwards.

La figure 4 illustre une vue de dessus du flan de tôle 4 après formation du collet 32 autour de l'orifice 12. Le flan de tôle 4 comprend une forme 34 autour du collet 32 due à la présence de la cuvette sur l'outillage de l'invention. La forme 34 présente l'avantage de renforcer la rigidité du flan de tôle.The figure 4 illustrates a top view of the sheet metal blank 4 after formation of the collar 32 around the orifice 12. The sheet metal blank 4 comprises a shape 34 around the collar 32 due to the presence of the cup on the tool of the invention . The form 34 has the advantage of reinforcing the rigidity of the sheet metal blank.

L'outillage et le procédé de l'invention peuvent par exemple être utilisés pour la formation d'un collet sur un flan de tôle pour le blocage d'une béquille de capot de véhicule automobile, ladite béquille étant configurée pour maintenir le capot en position ouverte.The tool and the method of the invention can for example be used for forming a collar on a sheet blank for blocking a motor vehicle hood strut, said strut being configured to hold the hood in position. opened.

Claims (9)

  1. A tool (2) for forming, on a drawing press, a collar (32) on a sheet metal blank (4) provided with an opening (12), the tool (2) comprising :
    - a lower part (6) forming a receiving surface (8) for the sheet metal blank;
    - an upper part (10) capable of pressing the sheet metal blank (4) against the receiving surface (8); anda collar (32) on a sheet metal blank (4) provided with an orifice (12), the tooling (2) comprising: a lower part (6) forming a receiving surface (8) for the sheet metal blank; an upper part (10) capable of pressing the sheet metal blank (4) against the receiving surface (8); and a lower part (11) forming a collar (32) on a sheet metal blank (4) provided with a hole (12).
    - a punch (14) adapted to form the collar (32) around the hole (12), the punch (14) being an integral part of the receiving surface (8),
    said surface (8) forming a cup (16) around said punch (14) allowing a portion (18) of the sheet metal blank, located around the orifice (12), to undergo a downward movement during pressing by the upper part (10), characterised in that the receiving surface (8) of the sheet metal blank (4) comprises an annular portion (24) around the cup (16), said portion (24) being at a height greater than or equal to the height of the punch (14).
  2. Tooling (2) according to one of claims 1, characterized in that the upper part (10) of said tooling (2) comprises a blade (20) configured to press the portion (18) of the sheet metal blank located around the hole (12), in the cup, around the punch.
  3. Tooling (2) according to claim 2, characterised in that the blade (20) comprises a contact surface (21) with the sheet metal blank (4), having a projecting profile describing a circle, capable of penetrating the cup (16) and forming a central cavity capable of receiving the punch (14).
  4. Tooling (2) according to one of claims 2 and 3, characterized in that the upper part (10) of said tooling (2) comprises a blank holder (22) arranged on the periphery of the blade (20), said blank holder (22) being configured to press the sheet metal blank (4) against the receiving surface (8) laterally to the cup (16).
  5. Tooling (2) according to the preceding claims, characterized in that the receiving surface (8) of the sheet metal blank (4) has, outside the annular portion (24) around the cup (16), a non-rectilinear profile cooperating with the blank holder (22).
  6. Tooling (2) according to claim 5, characterized in that the trough (16) is a first trough, the non-rectilinear profile cooperating with the blank holder (22) forming a second trough (30) surrounding the first trough (16).
  7. A tool (2) according to one of claims 1 to 6, characterized in that the trough (16) has a lateral surface (26) inclined at an angle of between 40° and 55° to a horizontal plane.
  8. A method of forming a sheet metal blank (4) comprising the following steps:
    a. drawing the sheet metal blank (4) ;
    b. forming an opening (12) on the sheet metal blank (4);
    c. forming a collar (32) around the hole (12); d. forming a collar (32) around the hole (12); e. forming a collar (32) around the hole (12); and f. forming a collar (32) around the hole (12).
    characterized in that the step of forming the collar (32) is carried out by means of a tool (2) conforming to one of claims 1 to 7.
  9. Method according to claim 8, characterised in that the punch (14) has a diameter greater than the diameter of the hole (12) in the sheet metal blank (4).
EP17808553.6A 2016-12-05 2017-11-13 Press equipment for forming a collar by trimming Active EP3548198B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1661921A FR3059576B1 (en) 2016-12-05 2016-12-05 PRESS TOOLS FOR FORMING A COLLET BY FILLING
PCT/FR2017/053093 WO2018104603A1 (en) 2016-12-05 2017-11-13 Press equipment for forming a collar by trimming

Publications (2)

Publication Number Publication Date
EP3548198A1 EP3548198A1 (en) 2019-10-09
EP3548198B1 true EP3548198B1 (en) 2020-08-05

Family

ID=57796714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17808553.6A Active EP3548198B1 (en) 2016-12-05 2017-11-13 Press equipment for forming a collar by trimming

Country Status (4)

Country Link
EP (1) EP3548198B1 (en)
CN (1) CN110049832B (en)
FR (1) FR3059576B1 (en)
WO (1) WO2018104603A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2348875A (en) * 1943-06-11 1944-05-16 Charles L Beard Punch and die
US5069051A (en) * 1990-09-07 1991-12-03 California Industrial Products, Inc. Method and apparatus for forming threads on a sleeve inner wall
JP3777367B2 (en) * 2003-06-23 2006-05-24 日高精機株式会社 Manufacturing method of fin for heat exchanger and mold apparatus thereof
JP2007175761A (en) * 2005-12-28 2007-07-12 Seiko Epson Corp Shaft hole forming method
DE102008031050A1 (en) 2008-07-01 2010-01-07 Trw Automotive Gmbh Attachment piece producing method for attaching seat belt retractor to motor vehicle, involves back-pressing pressed section to form case-like attachment piece, and calibrating attachment piece with respect to height and diameter of piece
DE102009038607A1 (en) * 2009-08-26 2011-03-31 Tox Pressotechnik Gmbh & Co. Kg Apparatus, method and tool for producing a collar pass in a component
CN102527759A (en) * 2010-12-14 2012-07-04 深圳亿和模具制造有限公司 Hole flanging method and die for forming high flange on thin plate
JP6006656B2 (en) * 2012-05-28 2016-10-12 東プレ株式会社 Method for forming hot pressed product and method for producing hot pressed product

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3059576A1 (en) 2018-06-08
CN110049832A (en) 2019-07-23
WO2018104603A1 (en) 2018-06-14
EP3548198A1 (en) 2019-10-09
FR3059576B1 (en) 2019-06-07
CN110049832B (en) 2021-03-19

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