EP3315224B1 - Press intended for shaping a sheet-metal blank and method for servicing such a press - Google Patents
Press intended for shaping a sheet-metal blank and method for servicing such a press Download PDFInfo
- Publication number
- EP3315224B1 EP3315224B1 EP17192626.4A EP17192626A EP3315224B1 EP 3315224 B1 EP3315224 B1 EP 3315224B1 EP 17192626 A EP17192626 A EP 17192626A EP 3315224 B1 EP3315224 B1 EP 3315224B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holding
- down means
- press
- matrix
- blank holder
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims description 15
- 239000002184 metal Substances 0.000 title claims description 6
- 238000007493 shaping process Methods 0.000 title description 2
- 239000011159 matrix material Substances 0.000 claims description 32
- 238000012423 maintenance Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
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
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
- B21D25/02—Working sheet metal of limited length by stretching, e.g. for straightening by pulling over a die
-
- 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
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- 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
- B21D24/04—Blank holders; Mounting means therefor
Definitions
- the present invention relates to a press intended to shape, by a stamping process, a sheet blank.
- the invention also relates to a method of maintaining such a press.
- the invention relates to a press which comprises a die and a punch adapted to stamp a sheet blank when the die descends against the punch.
- the press includes a blank holder which is guided vertically in translation from a first high position to a second low position when the die is lowered against the punch.
- the blank holder has at least two parts movable between them, such that the first part has a lateral displacement relative to the second part.
- the blank holder also includes first biasing means interposed between said first part and said second part of the blank holder.
- Such a method is for example particularly advantageous for the shaping of a sheet blank to form a roof of a motor vehicle, in particular a roof of a large motor vehicle such as a utility vehicle.
- return means such as pneumatic or hydraulic springs, which by compressing during the stamping operation, gradually stretch the sheet blank.
- This type of press generally presents problems for maintenance, because when disassembling part of the blank clamps, these return means must first be immobilized. Excluding such a step lengthens the maintenance operation and represents a danger in the event of improper release of these return means.
- these return means are essential for the operation of a “Stretch Draw” type press.
- WO 2012/097812 A1 describes a press intended to shape by a stamping process a sheet blank comprising a die, a punch and a blank holder with a connecting rod.
- the object of the invention is to alleviate this problem and to propose a press intended to shape a sheet metal blank, in particular a sheet metal blank intended to form a roof, by a drawing process of the "Stretch Draw" type.
- a large motor vehicle such as a utility vehicle.
- Such a press must allow maintenance operations to be carried out without requiring numerous preparation operations consisting in blocking all the return means, to allow disassembly of the mobile parts such as the blanks and this in a simple and secure manner.
- the subject of the invention is a press intended to form a sheet blank, by means of a stamping process, comprising a die and a punch suitable for stamping the sheet blank when the die is lowered against the punch, said press comprising a blank holder which is guided vertically in translation from a first high position to a second low position when the die is lowered against the punch.
- the blank holder has at least two parts movable between them, such that the first part has a lateral displacement relative to the second part.
- the blank holder also comprises first return means interposed between said first part and said second part of the blank holder, such that the first return means, in the low position of the blank holder, are arranged so as to have a positioning said relaxed.
- the second part of the blank holder is in lateral support against the first part of the blank holder.
- the second part of the blank holder is connected to the press frame by means of a connecting rod adapted to distance laterally said second part of the blank holder during the descent of the matrix.
- the connecting rod has a first end integral with the second part of the blank holder and a second end integral with the frame, the first end and the second end of the connecting rod form respectively with the second part of the blank holder and with the frame pivot type connection means.
- the matrix comprises a lateral part adapted to collaborate with the first part of the blank holder to block a lateral edge of the sheet blank, said lateral part comprising second return means suitable for s oppose the lateral displacement, towards the outside of the press, of the first part of the blank holder during the descent of the die.
- the blank holder comprises a third part which includes guide means making it possible to guide said blank holder vertically in translation.
- the third part of the blank holder forms a support along which the first part and the second part of the blank holder are guided laterally in translation.
- the third part of the blank holder has a side wall which forms a stop adapted to limit the lateral displacement in the direction of the punch of the first part of the blank holder.
- the first return means are adapted to keep the first part of the blank holder in abutment against the stop of the third part of the blank holder.
- the present invention also relates to a method of maintaining a press according to the invention according to claims 1 - 6 such that, the blank holder being previously positioned in the low position, said method comprises a step of dismantling the first part of the blank holder and a step of reassembling said first part without modifying the operation of the first return means.
- the figures 2 , 3 and 4 represent partial side views, in section, of the press 1 during different stages of the stamping process of the sheet blank 2.
- the die 5 of the press 1 begins its descent in the direction of the punch 3.
- the lateral part 51 of the matrix 5 bears against the first part 41 of the blank holder 4.
- a rod 22 is formed which is adapted to block the lateral edge 21 of the sheet blank 2 between the lateral part 51 of the matrix 5 and the first part 41 of the blank holder 4.
- the die 5 of the press 1 continues its descent in the direction of the punch 3, bringing with it a first phase of descent of the blank holder 4.
- the push rods 45 of the greenhouse blank 4 begins to be compressed, creating a restoring force opposing the descent of the matrix 5.
- the clamping force of the lateral edge 21 of the sheet blank 2 between the lateral part 51 of the matrix 5 and the first part 41 of the blank holder 4 increases accordingly.
- the connecting rod 6 pivots by a first angle ⁇ 1 sliding the second part 42 of the blank holder 4, which forms a piston, against the first bearing surface 411 of the first part 41 of the greenhouse -flan 4.
- the first return means 44 are in a so-called relaxed positioning, causing the free end of the control rod 443 of the piston 441 of the first return means 44 to no longer exert a return force against the second bearing surface 412 of the first part 41 of the blank holder 4.
- the die 5 of the press 1 is in contact with the punch 3, allowing the press 1 to shape the sheet blank 2.
- the whole lateral part 51 of the die 5 and blank holder 4 have deviated by a distance d 1 from the central part 54 of the die 5 and the punch 3.
- This spacing d 1 makes it possible to tension the sheet blank 2 during the stamping phase.
- This spacing d 1 results from the pivoting of the connecting rod 6 by a second angle ⁇ 2 , causing the second part 42 of the blank holder 4 to slide more against the first bearing surface 411 of the first part 41 of the blank holder 4.
- the first return means 44 remain in a relaxed position. In this last position of the press 1, the blank holder 4 is in its low position as defined above.
- FIGS. 5 , 6 and 7 show partial side views in section of the press during different stages of maintenance of the press according to the invention.
- the entire upper part of the press is removed, making it possible to carry out maintenance operations on the press 1.
- the blank holder 4 is previously positioned in the low position and the push rods 45 are partially disassembled.
- the withdrawal of the first part 41 of the blank holder 4 is done without modifying the operation of the first return means 44, thereby simplifying the disassembly and reassembly of the first part 41 of the blank holder 4.
- the upper part of the press ie the die 5
- the push rods 45 have not yet been reassembled and the whole press is not not yet returned to its work location.
- the second return means 53 of the matrix 5 position the lateral part 51 in lateral abutment against the central part 54 of the matrix 5.
- the blank holder 4 is in the low position, causing the first part 41 of the blank holder 4 is spaced from the spacing d 1 of the third part 43 of the blank holder 4. This results in a problem of alignment of the lateral part 51 of the matrix 5 with the blank holder 4.
- the oblique bearing surface 522 of the second key 52 of the lateral part 51 of the matrix 5 comes to bear against the oblique bearing surface 415 of the first key 46 of the blank holder 4.
- the sliding of these oblique bearing surfaces 415 and 522 one against the other aligns the lateral part 51 of the matrix 5 opposite the first part 41 of the blank holder 4 , by opposing the second return means 53 of the matrix 5.
- the lateral part 51 of the die 5 is correctly aligned with the first part 41 of the blank holder 4.
- the spacing d 1 is found well between the lateral part 51 and the central part 54 of the matrix 5.
- the press 1 can now be repositioned along the production line.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
La présente invention concerne une presse destinée à mettre en forme, par un procédé d'emboutissage, un flan de tôle. L'invention concerne aussi un procédé de maintenance d'une telle presse.The present invention relates to a press intended to shape, by a stamping process, a sheet blank. The invention also relates to a method of maintaining such a press.
En particulier, l'invention concerne une presse qui comporte une matrice et un poinçon adaptés pour emboutir un flan de tôle lors de la descente de la matrice contre le poinçon. La presse comporte un serre-flan qui est guidé verticalement en translation d'une première position haute vers une seconde position basse lors de la descente de la matrice contre le poinçon. Le serre-flan comporte au moins deux parties mobiles entre elles, telles que la première partie présente un déplacement latéral par rapport à la deuxième partie. Le serre-flan comporte aussi des premiers moyens de rappel interposés entre ladite première partie et ladite seconde partie du serre-flan.In particular, the invention relates to a press which comprises a die and a punch adapted to stamp a sheet blank when the die descends against the punch. The press includes a blank holder which is guided vertically in translation from a first high position to a second low position when the die is lowered against the punch. The blank holder has at least two parts movable between them, such that the first part has a lateral displacement relative to the second part. The blank holder also includes first biasing means interposed between said first part and said second part of the blank holder.
Il est connu du document
L'invention a pour objet une presse destinée à mettre en forme par un procédé d'emboutissage un flan de tôle, comportant une matrice et un poinçon adaptés pour emboutir le flan de tôle lors de la descente de la matrice contre le poinçon, ladite presse comportant un serre-flan qui est guidé verticalement en translation d'une première position haute vers une seconde position basse lors de la descente de la matrice contre le poinçon. Le serre-flan comporte au moins deux parties mobiles entre elles, telles que la première partie présente un déplacement latéral par rapport à la deuxième partie. Le serre-flan comporte aussi des premiers moyens de rappel interposés entre ladite première partie et ladite seconde partie du serre-flan, telle que les premiers moyens de rappel, dans la position basse du serre-flan, sont agencées de manière à présenter un positionnement dit détendu.The subject of the invention is a press intended to form a sheet blank, by means of a stamping process, comprising a die and a punch suitable for stamping the sheet blank when the die is lowered against the punch, said press comprising a blank holder which is guided vertically in translation from a first high position to a second low position when the die is lowered against the punch. The blank holder has at least two parts movable between them, such that the first part has a lateral displacement relative to the second part. The blank holder also comprises first return means interposed between said first part and said second part of the blank holder, such that the first return means, in the low position of the blank holder, are arranged so as to have a positioning said relaxed.
Dans ladite position basse du serre-flan, la seconde partie du serre-flan est en appui latéral contre la première partie du serre-flan.In said bottom position of the blank holder, the second part of the blank holder is in lateral support against the first part of the blank holder.
La deuxième partie du serre-flan est reliée au bâti de la presse par l'intermédiaire d'une bielle adaptée pour éloigner latéralement ladite seconde partie du serre-flan lors de la descente de la matrice. La bielle comporte une première extrémité solidaire de la deuxième partie du serre-flan et une seconde extrémité solidaire du bâti, la première extrémité et la seconde extrémité de la bielle forment respectivement avec la deuxième partie du serre-flan et avec le bâti des moyens de liaisons de type pivot.The second part of the blank holder is connected to the press frame by means of a connecting rod adapted to distance laterally said second part of the blank holder during the descent of the matrix. The connecting rod has a first end integral with the second part of the blank holder and a second end integral with the frame, the first end and the second end of the connecting rod form respectively with the second part of the blank holder and with the frame pivot type connection means.
Selon un deuxième mode de réalisation de l'invention, la matrice comporte une partie latérale adaptée pour collaborer avec la première partie du serre-flan pour bloquer un bord latéral du flan de tôle, ladite partie latérale comportant des seconds moyens de rappel adaptés pour s'opposer au déplacement latéral, vers l'extérieur de la presse, de la première partie du serre-flan lors de la descente de la matrice.According to a second embodiment of the invention, the matrix comprises a lateral part adapted to collaborate with the first part of the blank holder to block a lateral edge of the sheet blank, said lateral part comprising second return means suitable for s oppose the lateral displacement, towards the outside of the press, of the first part of the blank holder during the descent of the die.
Selon un troisième mode de réalisation de l'invention, le serre-flan comporte une troisième partie qui comporte des moyens de guidage permettant de guider verticalement en translation ledit serre-flan. La troisième partie du serre-flan forme un support le long duquel sont guidés latéralement en translation la première partie et la deuxième partie du serre-flan. La troisième partie du serre-flan comporte une paroi latérale qui forme une butée adaptée pour limiter le déplacement latéral en direction du poinçon de la première partie du serre-flan. En position haute du serre-flan, les premiers moyens de rappel sont adaptés pour maintenir en appui la première partie du serre-flan contre la butée de la troisième partie du serre-flan.According to a third embodiment of the invention, the blank holder comprises a third part which includes guide means making it possible to guide said blank holder vertically in translation. The third part of the blank holder forms a support along which the first part and the second part of the blank holder are guided laterally in translation. The third part of the blank holder has a side wall which forms a stop adapted to limit the lateral displacement in the direction of the punch of the first part of the blank holder. In the high position of the blank holder, the first return means are adapted to keep the first part of the blank holder in abutment against the stop of the third part of the blank holder.
La présente invention concerne aussi un procédé de maintenance d'une presse selon l'invention d'après les revendications 1 - 6 tel que, le serre-flan étant préalablement positionné en position basse, ledit procédé comporte une étape de démontage de la première partie du serre-flan et une étape de remontage de ladite première partie sans modifier le fonctionnement des premiers moyens de rappel.The present invention also relates to a method of maintaining a press according to the invention according to claims 1 - 6 such that, the blank holder being previously positioned in the low position, said method comprises a step of dismantling the first part of the blank holder and a step of reassembling said first part without modifying the operation of the first return means.
D'autres objets, caractéristiques et avantages de l'invention apparaîtront plus en détail à la lecture de la description qui suit, ainsi qu'à l'aide des dessins annexés, fournis à titre purement illustratif et non limitatif, parmi lesquels :
- La
figure 1 représente une vue partielle, en coupe, d'une presse destinée à mettre en forme par emboutissage un flan de tôle, selon l'invention ; - Les
figures 2 ,3 et4 représentent des vues latérales partielles, en coupe, de la presse lors des différentes étapes d'un procédé d'emboutissage du flan de tôle, selon l'invention ; et - Les
figures 5 ,6 et7 représentent des vues latérales partielles, en coupe, de la presse lors des différentes étapes de maintenance de la presse, selon l'invention.
- The
figure 1 shows a partial view, in section, of a press intended to shape by pressing a sheet blank, according to the invention; - The
figures 2 ,3 and4 represent partial side views, in section, of the press during the various stages of a stamping process of the sheet blank, according to the invention; and - The
figures 5 ,6 and7 show partial side views, in section, of the press during the various maintenance stages of the press, according to the invention.
La
- une première position haute de chargement du flan de
tôle 2 sur le plan dechargement 40 ; et - une seconde position basse correspondant à la position finale d'emboutissage du flan de
tôle 2 par lapresse 1.
- a first high loading position of the sheet blank 2 on the
loading plane 40; and - a second lower position corresponding to the final stamping position of the sheet blank 2 by the
press 1.
Chaque serre-flan 4 comporte trois parties :
- une
première partie 41 qui est destinée à collaborer avec une partie latérale 51 de lamatrice 5 et qui est adaptée pour suivre le déplacement latéral de la partie latérale 51 de lamatrice 5 lors de la descente de lamatrice 5 ; - une
deuxième partie 42 qui présente un déplacement latéral par rapport à lapremière partie 41, avec des premiers moyens derappel 44 qui sont interposés entre lepremière partie 41 et ladeuxième partie 42 du serre-flan 4 ; et - une
troisième partie 43 qui comporte des moyens deguidage 45 pour guider verticalement en translation le serre-flan 4 entre la première position haute et la seconde position basse.
- a
first part 41 which is intended to collaborate with alateral part 51 of thematrix 5 and which is adapted to follow the lateral displacement of thelateral part 51 of thematrix 5 during the descent of thematrix 5; - a
second part 42 which has a lateral displacement relative to thefirst part 41, with first return means 44 which are interposed between thefirst part 41 and thesecond part 42 of theblank holder 4; and - a
third part 43 which includes guide means 45 for guiding theblank holder 4 vertically in translation between the first high position and the second low position.
Les moyens de guidage 45 de la troisième partie 43 forment des tiges de poussée. La troisième partie 43 forme un support le long duquel peut coulisser latéralement la seconde partie 42. Dans l'exemple tel que représenté, le coulissement latéral de la seconde partie 42 se fait selon un axe horizontal. Une bielle 6 relie la seconde partie 42 du serre-flan 4 à un bâti 7. Le bâti 7 forme un support pour le poinçon 3 et comporte des ouvertures permettant de guider le coulissement vertical des tiges de poussée 45 du serre-flan 4. Une première extrémité 61 de la bielle 6 et une première extrémité 421 de la deuxième partie 42 du serre-flan 4, sont reliées entre elles en formant une première liaison de type pivot 63. De même, une seconde extrémité 62 de la bielle 6 et une partie du bâti 7, sont reliées entre elles en formant une seconde liaison de type pivot 64. La bielle 6 est positionnée de sorte à éloigner la seconde partie 42 du serre-flan 4 du bâti 7 lors de la descente de la matrice 5. La première partie 41 du serre-flan 4 coulisse en translation le long de la troisième partie 43 du serre-flan 4. En fonction du positionnement vertical de la matrice 5, la première partie 41 du serre-flan 4, est soit déplacée latéralement en entraînant dans son déplacement latéral la partie latérale 51 de la matrice 5, soit reste en appui entre différentes surfaces d'appuis de la seconde partie 42 et de la troisième partie 43 du serre-flan 4, telle que la première partie 41 du serre-flan 4 comporte :
- une première surface d'appui 411 qui est formée par une première paroi latérale positionnée en regard de l'extrémité libre de la
seconde partie 42 du serre-flan 4. La première surface d'appui 411 de lapremière partie 41 du serre-flan 4 est orientée en regard dupoinçon 3, permettant à ladeuxième partie 42 de guider vers l'extérieure de lapresse 1 lapremière partie 41 du serre-flan 4, lors de la descente de lamatrice 5 ; - une deuxième surface d'appui 412 qui est formée par une deuxième paroi latérale positionnée en regard des premiers moyens de
rappel 44. La deuxième surface d'appui 412 est orientée vers l'extérieur de lapresse 1 ; - une troisième surface d'appui 413 qui est formée par une troisième paroi latérale positionnée en regard d'une paroi latérale 431 de la
troisième partie 43 du serre-flan 4. La troisième surface d'appui 413 est orientée en regard dupoinçon 3 et forme une butée limitant le déplacement de lapremière partie 41 du serre-flan 4 en direction dupoinçon 3 ; et - une quatrième surface d'appui 414 qui est formée par une paroi latérale d'une
première clavette 46 qui collabore avec une paroi latérale 521 d'uneseconde clavette 52 de la partie latérale 51 de lamatrice 5.
- a
first bearing surface 411 which is formed by a first side wall positioned opposite the free end of thesecond part 42 of the hold-down 4. Thefirst bearing surface 411 of thefirst part 41 of the hold-down 4 is oriented opposite thepunch 3, allowing thesecond part 42 to guide thepress 1 towards the outside of thepress 1 thefirst part 41 of theblank holder 4, during the descent of thedie 5; - a
second bearing surface 412 which is formed by a second side wall positioned opposite the first return means 44. Thesecond bearing surface 412 is oriented towards the outside of thepress 1; - a
third bearing surface 413 which is formed by a third side wall positioned opposite aside wall 431 of thethird part 43 of theblank holder 4. Thethird bearing surface 413 is oriented opposite thepunch 3 and forms a stop limiting the movement of thefirst part 41 of theblank holder 4 in the direction of thepunch 3; and - a
fourth bearing surface 414 which is formed by a side wall of a first key 46 which collaborates with aside wall 521 of asecond key 52 of theside part 51 of thematrix 5.
L'extrémité libre de la seconde partie 42 du serre-flan 4, comporte un tampon d'appui 423 qui forme une surface de contact entre la première partie 41 et la deuxième partie 42 du serre-flan 4. Les premiers moyens de rappel 44 sont formés par un ressort hydraulique qui comporte un piston 441 qui coulisse dans une chambre de compression 442 formée dans une cavité de la seconde partie 42 du serre-flan 4. Le piston 441 comporte une tige de commande 443 dont l'extrémité libre est en appui contre la deuxième surface d'appui 412 de la première partie 41 du serre-flan 4. Dans la position haute de la matrice 5, telle que représentée dans cette figure, nous avons :
- la seconde clavette 52 de la partie latérale 51 de la matrice 5 qui est positionnée au-dessus de la première clavette 46 de la première partie 41 du serre-
flan 4. La première clavette 46 de la première partie 41 du serre-flan 4 comporte, au-dessus de la quatrièmesurface d'appui 414, une surface d'appuioblique 415 positionnée en regard d'unesurface d'appui oblique 522 de la seconde clavette 52 de la partie latérale 51 de la matrice 5. Les deux surfacesd'appui obliques 415et 522 des deux clavettes 46et 52 sont parallèles entre elles. Des seconds moyens de rappel 53 maintiennent en appui latéral la partie latérale 51 de la matrice 5 contre une partie centrale 54 de la matrice 5 ; et - le serre-
flan 4 qui est positionné dans sa première position haute, faisant que les premiers moyens de rappel 44 sont dans une position compressée. La tige de commande 443 crée alors une force de poussée contre la deuxièmesurface d'appui 412 en direction dupoinçon 3. Cette force de poussée maintien la troisièmesurface d'appui 413 en appui contre la paroi latérale 431 de la troisième partie 43 du serre-flan 4.
- the
second key 52 of thelateral part 51 of thematrix 5 which is positioned above thefirst key 46 of thefirst part 41 of the hold-down 4. Thefirst key 46 of thefirst part 41 of the hold-down 4 comprises , above thefourth bearing surface 414, anoblique bearing surface 415 positioned opposite anoblique bearing surface 522 of thesecond key 52 of thelateral part 51 of thematrix 5. The two surfaces 415 and 522 of the twooblique support 46 and 52 are mutually parallel. Second return means 53 maintain thekeys lateral part 51 of thematrix 5 in lateral support against acentral part 54 of thematrix 5; and - the
blank holder 4 which is positioned in its first high position, causing the first return means 44 to be in a compressed position. Thecontrol rod 443 then creates a pushing force against thesecond bearing surface 412 in the direction of thepunch 3. This pushing force maintains thethird bearing surface 413 in abutment against theside wall 431 of thethird part 43 of the hold-down 4.
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Claims (7)
- Press (1) intended to shape, by a method of stamping a sheet metal blank (2), comprising a matrix (5) and a punch (3) suitable for stamping the sheet metal blank (2) during the descent of the matrix (5) against the punch (3), said press comprising a holding-down means (4) which is guided vertically in translation from a first high position to a second low position during the descent of the matrix (5) against the punch (3), said holding-down means (4) comprising at least two portions (41, 42) mobile together, such that the first portion (41) has a lateral movement with respect to the second portion (42), said holding-down means (4) also comprising first return means (44), press wherein the first return means (44), in the low position of the holding-down means (4), are arranged so as to have a positioning called relaxed positioning, and in said low position of the holding-down means (4), the second portion (42) of the holding-down means (4) laterally bears against the first portion (41) of the holding-down means (4), said second portion (42) of the holding-down means (4) being connected to the structure (7) of the press (1) by way of a rod (6) suitable for laterally extending said second portion (42) of the holding-down means (4) during the descent of the matrix (5), the rod (6) comprising a first end (61) integral with the second portion (42) of the holding-down means (4) and a second end (62) integral with the structure (7), the first end (61) and the second end (62) of the rod (7) respectively forming, with the second portion (42) of the holding-down means (4) and with the structure (7), pivot-type connection means, characterised in that the first return means (44) are inserted between said first portion (41) and said second portion (42) of the holding-down means (4).
- Press (1) according to claim 1, characterised in that the matrix (5) comprises a lateral portion (51) suitable for collaborating with the first portion (41) of the holding-down means (4) to block a lateral edge (21) of the sheet metal blank (2), said lateral portion (51) comprising second return means (53) suitable for opposing the lateral movement, towards the outside of the press (1), of the first portion (41) of the holding-down means (4) during the descent of the matrix (5).
- Press (1) according to any one of the preceding claims, characterised in that the holding-down means (4) comprises a third portion (43) which comprises guiding means (45) making it possible to vertically guide in translation, said holding-down means (4).
- Press (1) according to claim 5, characterised in that the third portion (43) of the holding-down means (4) forms a support along which the first portion (41) and the second portion (42) of the holding-down means (4) are guided laterally in translation.
- Press (1) according to claim 5 or 6, characterised in that the third portion (43) of the holding-down means (4) comprises a lateral wall (431) which forms an abutment suitable for limiting the lateral movement in the direction of the punch (3) of the first portion (41) of the holding-down means (4).
- Press (1) according to claim 6 or 7, characterised in that, in the high position of the holding-down means (4), the first return means (44) are suitable for holding the first portion (41) of the holding-down means (4) born against the abutment (431) of the third portion (43) of the holding-down means (4).
- Method for holding a press (1) according to any one of the preceding claims, wherein: the second portion (42) of the holding-down means (4) is laterally born against the first portion (41) of the holding-down means (4), said second portion (42) of the holding-down means (4) being connected to the structure (7) of the press (1) by way of a rod (6) suitable for laterally extending said second portion (42) of the holding-down means (4) during the descent of the matrix (5), the rod (6) comprising a first end (61) integral with the second portion (42) of the holding-down means (4) and a second end (62) integral with the structure (7), the first end (61) and the second end (62) of the rod (7) respectively forming, with the second portion (42) of the holding-down means (4) and with the structure (7), pivot-type connection means;
the holding-down means (4) being positioned beforehand in the low position, said method comprises a step of disassembling the first portion (41) from the holding-down means (4) and a step of reassembling said first portion (41) without modifying the functioning of the first return means (44), characterised in that the first return means (44) are inserted between said first portion (41) and said second portion (42) of the holding-down means (4).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1660369A FR3057791B1 (en) | 2016-10-26 | 2016-10-26 | PRESS FOR SHAPING A FLAN OF A SHEET AND METHOD OF MAINTAINING SUCH A PRESS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3315224A1 EP3315224A1 (en) | 2018-05-02 |
EP3315224B1 true EP3315224B1 (en) | 2020-04-08 |
Family
ID=57750222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17192626.4A Active EP3315224B1 (en) | 2016-10-26 | 2017-09-22 | Press intended for shaping a sheet-metal blank and method for servicing such a press |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3315224B1 (en) |
ES (1) | ES2784708T3 (en) |
FR (1) | FR3057791B1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012097812A1 (en) * | 2011-01-21 | 2012-07-26 | Giw Verwaltungs- Und Vertriebs Gmbh | Method and device for drawing sheet metal |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3459025A (en) | 1967-12-07 | 1969-08-05 | Cyril Bath Co | Stretching fixture with quadrilateral linkage control of stretch head movements |
BR9812233A (en) * | 1997-09-18 | 2000-07-18 | Cosma Int Inc | Matrix set for stamping by drawing sheet metal on a press, and, process for stamping by drawing sheet metal on a drawing set by drawing on a press. |
DE10334483B4 (en) * | 2003-07-29 | 2006-09-28 | Daimlerchrysler Ag | Method and drawing tool for producing a sheet metal part from a circuit board |
JP5319748B2 (en) * | 2011-09-09 | 2013-10-16 | エムズ株式会社 | Press molding method and press molding apparatus |
-
2016
- 2016-10-26 FR FR1660369A patent/FR3057791B1/en not_active Expired - Fee Related
-
2017
- 2017-09-22 ES ES17192626T patent/ES2784708T3/en active Active
- 2017-09-22 EP EP17192626.4A patent/EP3315224B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012097812A1 (en) * | 2011-01-21 | 2012-07-26 | Giw Verwaltungs- Und Vertriebs Gmbh | Method and device for drawing sheet metal |
Also Published As
Publication number | Publication date |
---|---|
FR3057791A1 (en) | 2018-04-27 |
ES2784708T3 (en) | 2020-09-30 |
EP3315224A1 (en) | 2018-05-02 |
FR3057791B1 (en) | 2018-11-23 |
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