EP0323792A1 - Progressive die for a deep drawing press - Google Patents

Progressive die for a deep drawing press Download PDF

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Publication number
EP0323792A1
EP0323792A1 EP88420426A EP88420426A EP0323792A1 EP 0323792 A1 EP0323792 A1 EP 0323792A1 EP 88420426 A EP88420426 A EP 88420426A EP 88420426 A EP88420426 A EP 88420426A EP 0323792 A1 EP0323792 A1 EP 0323792A1
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EP
European Patent Office
Prior art keywords
tool
stamped
sole
vertical
punch
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.)
Granted
Application number
EP88420426A
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German (de)
French (fr)
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EP0323792B1 (en
Inventor
Gérard Lavorel
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.)
ATELIER DE DECOUPAGE EMBOUTISSAGE ET MECANIQUE de la VALLEE DE L'ARVE ADEMVA
Original Assignee
ATELIER DE DECOUPAGE EMBOUTISSAGE ET MECANIQUE de la VALLEE DE L'ARVE ADEMVA
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Application filed by ATELIER DE DECOUPAGE EMBOUTISSAGE ET MECANIQUE de la VALLEE DE L'ARVE ADEMVA filed Critical ATELIER DE DECOUPAGE EMBOUTISSAGE ET MECANIQUE de la VALLEE DE L'ARVE ADEMVA
Priority to AT88420426T priority Critical patent/ATE63845T1/en
Publication of EP0323792A1 publication Critical patent/EP0323792A1/en
Application granted granted Critical
Publication of EP0323792B1 publication Critical patent/EP0323792B1/en
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    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices
    • B21D45/04—Ejecting devices interrelated with motion of tool
    • 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
    • B21D22/28—Deep-drawing of cylindrical articles using consecutive dies

Definitions

  • the present invention relates to a tool to follow for a stamping press.
  • stampings are formed in one or more parallel rows from a metal strip which is supplied along the axis of the machine.
  • the strip itself which supports the stampings, and which, progressively advancing, serves as a transfer member from one post to the next.
  • This more expensive mode of work is unfortunately not applicable for the production of very deep stampings, as indicated above, because the parts, which are held only by thin metal strands on the strip, tend to be placed across.
  • the invention which aims to remedy this drawback, relates to a tool to be followed which allows the production of very deep stamps, while using an ordinary press and a feed consisting of a metal strip.
  • This tool to be followed is of the type comprising, in a manner known per se and for each unitary stamping station, a punch carried by the upper sole of the tool, itself fixed to the press bush, and also comprising a sole lower, fixed to the press table, which carries a die-carrying plate, each vertical drawing orifice comprising a vertical piston pushed from bottom to top by an elastic repulsion device, such as a jack.
  • This tool is equipped with two additional means: - Support means for the metal strip placed, on the one hand and in the transverse direction, on either side of each pre-stamped when the latter is in line with the punch and the orifice stamping of the corresponding die, and on the other hand under the bottom of this pre-stamped in this position, these three support means being slightly elastically pushed from bottom to top and being retractable vertically by a pressure from top to bottom; and - means for vertical support on the strip, for centering the pre-stamped, and for extracting the stamped during the ascent of the punch, these means being constituted by a rigid horizontal plate, which is free to move vertically between two stops while being pushed elastically upwards, this rigid plate being placed between said strip and the upper sole of the tool and carrying an elastic vertical support member against the upper sole which is pushed very strongly from bottom to top , this same rigid plate further comprising, for each stamping station, a vertical centering tube directed downwards and capable of being traversed, in narrow sliding, by the punch when it descends,
  • this tool to be followed is also such that the body of the piston, placed in the drawing orifice, is hollow and constitutes the body of a single-acting cylinder fed by an orifice which puts in communication the chamber of this jack with the space located under this piston and supplied with compressed fluid, the free end of the rod of this jack carrying the means for supporting the bottom of the pre-stamped.
  • the support means of the strip are constituted by horizontal and longitudinal bars which are mounted at the free end of the vertical rods of jacks, formed in the body of the bottom sole.
  • the die holder plate is provided with longitudinal grooves capable of serving as housings for the bars when they are in the low position.
  • this press tool to follow has an upper sole 1, fixed to the press slide (not shown), and a lower sole 2, fixed to the press table (also not shown).
  • the sole 1 carries a plurality of punches 3, including one punch per elementary stamping station. For example, for each stamping station, there are three identical punches aligned in the transverse direction.
  • FIG. 1 shows a stamping station which is not the first station, so that it is a "pre-stamped" 7, cup-shaped, which is presented on this station, vertically vertical to the hallmark 3.
  • each punch 3 In the vertical alignment of each punch 3, the sole 2 and the plate 4 are crossed by a vertical blind orifice 8 which is, in a very conventional manner, of diameter slightly greater than that of the punch 3.
  • This orifice 8 contains , still in a manner known per se, a piston 9 with vertical sliding which is elastically pushed upwards by means of an air pressure applied by a pipe 10, to the lower part 11 of the blind hole 8 (the assembly 8 at 10 is actually a pneumatic cylinder).
  • the piston 9 is hollow and it constitutes the body of a single-acting pneumatic cylinder, supplied with compressed air by a lower orifice 12 bringing the chamber 13 of this cylinder into communication with the space 11 predefined.
  • This jack comprises a piston 14 and a rod 15, the free end of which carries a horizontal disc 16 on which rests the bottom of the pre-drawn 7, as seen in FIG. 1. Note that with these arrangements, the pressure exerted from bottom to top on the piston 14 is fairly low.
  • the horizontal disc 16 therefore serves as a means of supporting the pre-stamped 7.
  • other elastic support members are provided, one on either side of each pre-stamped 7.
  • these other support members consist of two horizontal longitudinal bars 17,18, mounted at the free end of the vertical rods 19,20 of two pneumatic cylinders 21,22 which are arranged as shown in the body of the lower sole 2.
  • the chambers 23, 24 of these jacks 21, 22 are supplied, under relatively low pressure, with compressed air by means of lines 25 and 26.
  • Two longitudinal grooves 27 and 28 are provided in the plate 4 to receive the bars 17 and 18 when they are in the low position, with the rods 19 and 20 retracted into the chambers 23, 24 of the jacks 21 and 22.
  • the tool comprises four support bars 17 and 18. More generally, for n rows of pre-stamped 7, there will be n + 1 support bars 17.18.
  • this tool comprises a horizontal longitudinal plate 29, rigid and thick, of width substantially equal to or slightly greater than that of the strip 6, this plate being free to move vertically between a lower stop 30, constituted by a protrusion 33 of the plate 4, and an upper stop 31 which is constituted by a disc carried by a vertical baluster 32 fixed in the protrusion 33.
  • the plate 29 is pierced with an orifice 34 for the passage of the baluster 32.
  • balusters 32 which are distributed on the plate 4 so as to guide the plate 29 in vertical sliding, the elastic support of the latter being provided by helical springs 35 which surround each guide column 32 and which tend to push the plate 29 upwards.
  • the piston 38 of this cylinder is therefore pushed upwards, and it is on the free end of its rod 39 that the upper sole 1 comes to bear in order to lower the plate 29 when the slide of the press itself initiates its descent.
  • the rigid plate 29 For each unit stamping station (by "unit station - stamping” is meant the elementary stamping station constituted by a punch 3 and a determined die 5), the rigid plate 29 includes a vertical and cylindrical centering tube 40, directed downwards and whose length, relatively small, is slightly greater than the depth of the pre-stamped 7. This tube 40 is placed vertically above the pre-stamped 7, in which it is able to penetrate to ensure its centering, and it must also allow passage to the punch 3 during its vertical movement.
  • This centering tube 40 is therefore of external diameter substantially equal to the internal diameter of the pre-stamped 7, with the clearance close to allowing it to slide in this pre-stamped 7, and its internal diameter is substantially equal to the diameter of the cylindrical punch 3, here still close to play capable of allowing the sliding of this punch in this tube 40.
  • the plate 29 On either side, in the transverse direction, of each centering tube 40, the plate 29 is equipped with protrusions 41, 42, which are directed downwards and which are vertically vertical to the support bars 17 and 18
  • These protrusions 41, 42 are of length substantially equal to slightly greater than that of the centering tube 40, and they are intended to press on the discs 17, 18 to drive them in the lowering movement communicated, by the press slide, to the upper sole 1 and, via the support cylinder 36, to the rigid plate 29.
  • the press slide starts its descent by driving the sole 1 in the direction of the arrow F.
  • This sole 1 presses on the free end of the rod 39 of the jack 36, but this rod does not sink, because the pressure exerted from bottom to top on the piston 38 is much greater than that exerted from bottom to top on the plate 29 by all of the springs 35.
  • These springs 35 therefore collapse and the plate 29 descends with the sole 1 and the punch 3.
  • the plate 29 drives, when the protrusions 41, 42 have come to bear on the bars 17 and 18, the rods 19 and 20 of the jacks 21 and 22, so that the strip also descends while also causing the concomitant descent of the disc 16, because the pressure exerted on the piston 14 is quite low.
  • FIG. 2 shows the position obtained for the various elements when the plate 29 has come to bear on the lower stop 30: the rods 15, 19 and 20 of the three jacks 8, 21 and 22 have retracted as much as possible, that is to say -to say that the support discs 17 and 18 have returned to the housings 27 and 28, while the support disc 16 is resting on the upper face, then slightly retracted, of the piston 9.
  • the centering tube 40 is, at this stage, entered to the bottom of the pre-drawn 7.
  • the plate 29 can no longer descend.
  • the sole 1 pushes the rod 39 into the body of the jack 36, while the punch 3 penetrates, as shown in FIG. 3, into the die 5 by drawing of the part 7, which it shrinks in diameter and increases in length.
  • the piston 9 of the cylinder 8 is pressed down, and it follows the downward movement of the punch 3.
  • the position of Figure 3 corresponds substantially to the bottom dead center of the slide.
  • the ascent phase of the slide is shown diagrammatically in FIG. 4.
  • the stampings 7 all grip the punches 3 very closely, so that the strip 6 rises with the punch 3, carrying with it the centralizing tubes 40 and therefore the rigid plate 29. The latter then comes to bear against its upper end-of-travel stops 31 (position in FIG. 4), which stops its ascent.
  • the tubes 40 play the role of extractors for the stampings 7, so that the punches come out of the stampings 7, while the support bars 17, 18 have returned to the high position.
  • the strip 6 is advanced one step in the longitudinal direction, so that we are finally brought back to the configuration of FIG. 1.
  • the invention is not limited to the embodiment which has just been described, this tool being quite the contrary likely to be produced in many equivalent forms.
  • the cylinders 36, 21 and 24 could be replaced by repulsion springs, and the springs 35 by one or more cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Lubricants (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Meat, Egg Or Seafood Products (AREA)

Abstract

Progressive die intended to equip a drawing press for carrying out deep-drawing operations. <??>The strip (6) is associated with elastic support means (16, 17, 18). A rigid intermediate plate (29), vertically movable between two stop limits (30, 31), carries tubes (40) for centring and extraction. <IMAGE>

Description

La présente invention se rapporte à un outil à suivre pour presse d'emboutissage.The present invention relates to a tool to follow for a stamping press.

La réalisation en série d'emboutis très profonds, de profondeur supérieure ou égale à 1,5 fois le diamètre, est effectuée généralement à l'aide d'une presse à transfert. Il s'agit d'une presse spécialement conçue pour assurer le transfert, à chaque remontée du coulisseau de la presse, de chaque embouti au poste suivant. Une presse de ce type est très onéreuse en raison de sa complexité, et elle ne permet en outre de traiter qu'une seule rangée de pièces à la fois.The production of very deep stampings in series, with a depth greater than or equal to 1.5 times the diameter, is generally carried out using a transfer press. It is a press specially designed to ensure the transfer, at each ascent of the press slide, of each stamped to the next station. A press of this type is very expensive because of its complexity, and furthermore it allows only one row of parts to be processed at a time.

Un autre mode de travail consiste à utiliser une presse simple beaucoup moins onéreuse, qui est munie d'outils à suivre aptes à réaliser les phases successives d'emboutissage. Dans ce cas, les emboutis sont formés en une ou plusieurs rangées parallèles à partir d'une bande métallique qui est alimentée selon l'axe de la machine. Dans ce cas, c'est la bande elle-même qui supporte les emboutis, et qui, en avançant progressivement, sert d'organe de transfert d'un poste au suivant. Ce mode de travail, plus onéreux, est malheureusement inapplicable pour la réalisation d'emboutis très profonds, tels que ci-dessus désignés, car les pièces, qui ne sont tenues que par de minces brins métalliques sur la bande, ont tendance à se placer en travers.Another working method consists in using a much cheaper simple press, which is provided with tracking tools capable of carrying out the successive stamping phases. In this case, the stampings are formed in one or more parallel rows from a metal strip which is supplied along the axis of the machine. In this case, it is the strip itself which supports the stampings, and which, progressively advancing, serves as a transfer member from one post to the next. This more expensive mode of work is unfortunately not applicable for the production of very deep stampings, as indicated above, because the parts, which are held only by thin metal strands on the strip, tend to be placed across.

L'invention, qui vise à remédier à cet inconvénient, a pour objet un outil à suivre qui permettre la réalisation d'emboutis très profonds, tout en utilisant une presse ordinaire et une alimentation constituée par une bande métallique. Cet outil à suivre est du type comportant, de manière connue en soi et pour chaque poste unitaire d'emboutissage, un poinçon porté par la semelle supérieure de l'outil, elle-même fixée au collisseau de la presse, et comportant aussi une semelle inférieure, fixée sur la table de la presse, qui porte une plaque porte-matrices, chaque orifice vertical d'emboutissage comportant un piston vertical poussé de bas en haut par un dispositif de répulsion élastique, tel qu'un vérin. Cet outil est équipé de deux moyens supplémentaires :
- des moyens de soutien de la bande métallique placés, d'une part et dans le sens transversal, de part et d'autre de chaque pré-embouti lorsque celui-ci est à l'aplomb du poinçon et de l'orifice d'emboutissage de la matrice correspondante, et d'autre part sous le fond de ce pré-embouti dans cette position, ces trois moyens de soutien étant faiblement repoussés élastiquement de bas en haut et étant escamotables verticalement par une pression exercée du haut en bas ; et
- des moyens d'appui vertical sur la bande, de centrage du pré-embouti, et d'extraction de l'embouti lors de la remontée du poinçon, ces moyens étant constitués par une plaque rigide horizontale, qui est libre de se mouvoir verticalement entre deux butées tout en étant repoussée élasti­quement vers le haut, cette plaque rigide étant placée entre ladite bande et la semelle supérieure de l'outil et portant un organe d'appui vertical élastique contre la semelle supérieure qui est repoussé très fortement de bas en haut, cette même plaque rigide comportant en outre, pour chaque poste d'emboutissage, un tube vertical de centrage dirigé vers le bas et apte à être traversé, en coulissement étroit, par le poinçon lors de la descente de celui-ci, et à venir s'encastrer étroitement, lorsque cette plaque rigide descend sous la pression de la semelle sur ledit organe d'appui, dans ledit pré-embouti, et cette plaque rigide comportant enfin des protubérances verticales dirigées vers le bas et aptes à venir en appui sur chacun desdits moyens de soutien de la bande placés de part et d'autre des pré-emboutis.The invention, which aims to remedy this drawback, relates to a tool to be followed which allows the production of very deep stamps, while using an ordinary press and a feed consisting of a metal strip. This tool to be followed is of the type comprising, in a manner known per se and for each unitary stamping station, a punch carried by the upper sole of the tool, itself fixed to the press bush, and also comprising a sole lower, fixed to the press table, which carries a die-carrying plate, each vertical drawing orifice comprising a vertical piston pushed from bottom to top by an elastic repulsion device, such as a jack. This tool is equipped with two additional means:
- Support means for the metal strip placed, on the one hand and in the transverse direction, on either side of each pre-stamped when the latter is in line with the punch and the orifice stamping of the corresponding die, and on the other hand under the bottom of this pre-stamped in this position, these three support means being slightly elastically pushed from bottom to top and being retractable vertically by a pressure from top to bottom; and
- means for vertical support on the strip, for centering the pre-stamped, and for extracting the stamped during the ascent of the punch, these means being constituted by a rigid horizontal plate, which is free to move vertically between two stops while being pushed elastically upwards, this rigid plate being placed between said strip and the upper sole of the tool and carrying an elastic vertical support member against the upper sole which is pushed very strongly from bottom to top , this same rigid plate further comprising, for each stamping station, a vertical centering tube directed downwards and capable of being traversed, in narrow sliding, by the punch when it descends, and to come fit tightly, when this rigid plate descends under the pressure of the sole on said support member, in said pre-pressed, and this rigid plate finally comprising vertical protrusions directed downwards and capable of come to bear on each of said means for supporting the strip placed on either side of the pre-stamped.

Conformément à une caractéristique avantageuse, cet outil à suivre est en outre tel que le corps du piston, placé dans l'orifice d'emboutissage, est creux et constitue le corps d'un vérin à simple effet alimenté par un orifice qui met en communication la chambre de ce vérin avec l'espace situé sous ce piston et alimenté en fluide comprimé, l'extrémité libre de la tige de ce vérin portant le moyen de soutien du fond du pré-embouti.According to an advantageous characteristic, this tool to be followed is also such that the body of the piston, placed in the drawing orifice, is hollow and constitutes the body of a single-acting cylinder fed by an orifice which puts in communication the chamber of this jack with the space located under this piston and supplied with compressed fluid, the free end of the rod of this jack carrying the means for supporting the bottom of the pre-stamped.

Préférentiellement, les moyens de soutien de la bande, disposés de part et d'autre du pré-embouti, sont constitués par des barrettes horizontales et longitudinales qui sont montées à l'extrémité libre des tiges verticales de vérins, ménagés dans le corps de la semelle inférieure.Preferably, the support means of the strip, arranged on either side of the pre-stamped, are constituted by horizontal and longitudinal bars which are mounted at the free end of the vertical rods of jacks, formed in the body of the bottom sole.

Avantageusement dans ce cas la plaque porte-matrices est pourvue de saignées longitudinales aptes à servir de logements pour les barrettes lorsqu'elles sont en position basse.Advantageously in this case the die holder plate is provided with longitudinal grooves capable of serving as housings for the bars when they are in the low position.

De toute façon, l'invention sera bien comprise, et ses avantages et autres caractéristiques ressortiront, au cours de la description suivante d'un exemple non limitatif de réalisation, en référence au dessin schématique annexé dans lequel :

  • Figure 1 est une vue en coupe transversale partielle, de cet outil à suivre ; sur cette figure, le coulisseau de la presse est en position haute ;
  • Figure 2 est une vue similaire à la figure 1, mais montrant la phase de la descente du coulisseau qui précède l'emboutissage ;
  • Figure 3 montre de la même façon la phase suivante et finale de la descente du coulisseau, phase pendant laquelle a lieu l'emboutissage proprement dit ; et
  • Figure 4 montre pareillement la remontée du coulisseau, avec extraction de l'embouti.
In any case, the invention will be well understood, and its advantages and other characteristics will emerge during the following description of a non-limiting example of embodiment, with reference to the appended schematic drawing in which:
  • Figure 1 is a partial cross-sectional view of this tool to follow; in this figure, the press slide is in the high position;
  • Figure 2 is a view similar to Figure 1, but showing the phase of descent of the slide preceding the drawing;
  • Figure 3 shows in the same way the next and final phase of the descent of the slide, phase during which the actual stamping takes place; and
  • Figure 4 similarly shows the ascent of the slide, with extraction of the stamped.

En se reportant tout d'abord à la figure 1, cet outil à suivre pour presse comporte une semelle supérieure 1, fixée au coulisseau de la presse (non représenté), et une semelle inférieure 2, fixée sur la table de la presse (également non représentée).Referring first to Figure 1, this press tool to follow has an upper sole 1, fixed to the press slide (not shown), and a lower sole 2, fixed to the press table (also not shown).

La semelle 1 porte une pluralité de poinçons 3, dont un poinçon par poste élémentaire d'emboutissage. Il y a pour exemple, pour chaque poste d'emboutissage, trois poinçons identique alignés dans le sens transversal.The sole 1 carries a plurality of punches 3, including one punch per elementary stamping station. For example, for each stamping station, there are three identical punches aligned in the transverse direction.

Sur la semelle inférieure 2 est fixée une plaque 4 porte-matrices 5. Comme il se doit, chaque matrice 5 est placée à l'aplomb vertical du poinçon associé 3, afin de coopérer avec celui-ci, lors de la descente du coulisseau, pour réaliser l'emboutissage. La bande métallique 6 à emboutir est alimentée pas à pas longitudinalement, c'est-à-dire d'avant en arrière sur le dessin. La figure 1 montre un poste d'emboutissage qui n'est pas le premier poste, de sorte que c'est un "pré-embouti" 7, en forme de coupelle, qui est présenté sur ce poste, à l'aplomb vertical du poinçon 3.On the lower sole 2 is fixed a plate 4 die holder 5. As it should be, each die 5 is placed vertically above the associated punch 3, in order to cooperate with it, when the slide is lowered, to make the stamping. The metal strip 6 to be stamped is fed step by step longitudinally, that is to say from front to back in the drawing. Figure 1 shows a stamping station which is not the first station, so that it is a "pre-stamped" 7, cup-shaped, which is presented on this station, vertically vertical to the hallmark 3.

A l'aplomb vertical de chaque poinçon 3, la semelle 2 et la plaque 4 sont traversées par un orifice vertical borgne d'emboutissage 8 qui est, de manière très classique, de diamètre légèrement supérieur à celui du poinçon 3. Cet orifice 8 contient, toujours de manière connue en soi, un piston 9 à coulissement vertical qui est repoussé élastiquement vers le haut au moyen d'une pression d'air appliquée par une conduite 10, à la partie inférieure 11 du trou borgne 8 (l'ensemble 8 à 10 est en fait un vérin pneumatique).In the vertical alignment of each punch 3, the sole 2 and the plate 4 are crossed by a vertical blind orifice 8 which is, in a very conventional manner, of diameter slightly greater than that of the punch 3. This orifice 8 contains , still in a manner known per se, a piston 9 with vertical sliding which is elastically pushed upwards by means of an air pressure applied by a pipe 10, to the lower part 11 of the blind hole 8 (the assembly 8 at 10 is actually a pneumatic cylinder).

Selon une première caractéristique de l'invention, le piston 9 est creux et il constitue le corps d'un vérin pneumatique à simple effet, alimenté en air comprimé par un orifice inférieur 12 mettant en communi­cation la chambre 13 de ce vérin avec l'espace 11 prédéfini. Ce vérin comporte un piston 14 et une tige 15, dont l'extrémité libre porte un disque horizontal 16 sur lequel vient reposer le fond du pré-embouti 7, comme on le voit sur la figure 1. A noter qu'avec ces dispositions, la pression exercée de - bas en haut sur le piston 14 est assez faible.According to a first characteristic of the invention, the piston 9 is hollow and it constitutes the body of a single-acting pneumatic cylinder, supplied with compressed air by a lower orifice 12 bringing the chamber 13 of this cylinder into communication with the space 11 predefined. This jack comprises a piston 14 and a rod 15, the free end of which carries a horizontal disc 16 on which rests the bottom of the pre-drawn 7, as seen in FIG. 1. Note that with these arrangements, the pressure exerted from bottom to top on the piston 14 is fairly low.

Le disque horizontal 16 sert donc de moyen de support du pré-embouti 7. Afin d'assurer le soutien parfait de la bande 6, il est prévu d'autres organes d'appui élastiques, un de part et d'autre de chaque pré-embouti 7. Dans l'exemple représenté, ces autres organes d'appui sont constitués par deux barrettes longitudinales horizontales 17,18, montées à l'extrémité libre des tiges verticales 19,20 de deux vérins pneumatiques 21,22 qui sont ménagés comme représenté dans le corps de la semelle inférieure 2. Les chambres 23,24 de ces vérins 21,22 sont alimentées, sous relativement faible pression, en air comprimé par l'intermédiaire de conduites 25 et 26. Deux saignées longitudinales 27 et 28 sont prévues dans la plaque 4 pour recevoir les barrettes 17 et 18 lorsqu'elles sont en position basse, avec les tiges 19 et 20 rentrées dans les chambres 23,24 des vérins 21 et 22.The horizontal disc 16 therefore serves as a means of supporting the pre-stamped 7. In order to ensure perfect support for the strip 6, other elastic support members are provided, one on either side of each pre-stamped 7. In the example shown, these other support members consist of two horizontal longitudinal bars 17,18, mounted at the free end of the vertical rods 19,20 of two pneumatic cylinders 21,22 which are arranged as shown in the body of the lower sole 2. The chambers 23, 24 of these jacks 21, 22 are supplied, under relatively low pressure, with compressed air by means of lines 25 and 26. Two longitudinal grooves 27 and 28 are provided in the plate 4 to receive the bars 17 and 18 when they are in the low position, with the rods 19 and 20 retracted into the chambers 23, 24 of the jacks 21 and 22.

Dans le cas où la bande 6 comporte trois rangées longitudinales et parallèles, d'emboutis et pré-emboutis 7, l'outil comporte quatre barrettes de support 17 et 18. Plus généralement, pour n rangées de pré-emboutis 7, il y aura n + 1 barrettes de support 17,18.In the case where the strip 6 comprises three longitudinal and parallel rows, of stamped and pre-stamped 7, the tool comprises four support bars 17 and 18. More generally, for n rows of pre-stamped 7, there will be n + 1 support bars 17.18.

Selon une autre caractéristique de l'invention, cet outil comporte une plaque longitudinale horizontale 29, rigide et épaisse, de largeur sensi­blement égale ou légèrement supérieure à celle de la bande 6, cette plaque étant libre de se mouvoir verticalement entre une butée inférieure 30, constituée par une protubérance 33 de la plaque 4, et une butée supérieure 31 qui est constituée par un disque porté par une colonnette verticale 32 fixée dans la protubérance 33.According to another characteristic of the invention, this tool comprises a horizontal longitudinal plate 29, rigid and thick, of width substantially equal to or slightly greater than that of the strip 6, this plate being free to move vertically between a lower stop 30, constituted by a protrusion 33 of the plate 4, and an upper stop 31 which is constituted by a disc carried by a vertical baluster 32 fixed in the protrusion 33.

La plaque 29 est percée d'un orifice 34 de passage de la colonnette 32. Il y a en fait plusieurs colonnettes 32 qui sont réparties sur la plaque 4 de manière à guider en coulissement vertical la plaque 29, le soutien élastique de celle-ci étant assuré par des ressorts hélicoïdaux 35 qui entourent chaque colonnette de guidage 32 et qui tendant à repousser la plaque 29 vers le haut.The plate 29 is pierced with an orifice 34 for the passage of the baluster 32. There are in fact several balusters 32 which are distributed on the plate 4 so as to guide the plate 29 in vertical sliding, the elastic support of the latter being provided by helical springs 35 which surround each guide column 32 and which tend to push the plate 29 upwards.

La plaque rigide 29, qui est placée entre la bande 6 et la semelle supérieure 1, porte un vérin pneumatique vertical 36 qui est alimenté sous pression d'air par une conduite 37. Le piston 38 de ce vérin est donc repoussé vers le haut, et c'est sur l'extrémité libre de sa tige 39 que vient appuyer la semelle supérieure 1 pour faire descendre la plaque 29 quand le coulisseau de la presse amorce lui-même sa descente.The rigid plate 29, which is placed between the strip 6 and the upper sole 1, carries a vertical pneumatic cylinder 36 which is supplied under air pressure by a pipe 37. The piston 38 of this cylinder is therefore pushed upwards, and it is on the free end of its rod 39 that the upper sole 1 comes to bear in order to lower the plate 29 when the slide of the press itself initiates its descent.

Pour chaque poste unitaire d'emboutissage (par "poste unitaire - d'emboutissage", on entend le poste élémentaire d'emboutissage constitué par un poinçon 3 et une matrice 5 déterminés), la plaque rigide 29 comporte un tube centreur vertical et cylindrique 40, dirigé vers le bas et dont la longueur, relativement faible, est légèrement supérieure à la profondeur du pré-embouti 7. Ce tube 40 est placé à l'aplomb vertical du pré-embouti 7, dans lequel il est apte à pénétrer pour assurer son centrage, et il doit aussi livrer passage au poinçon 3 lors de son mouvement vertical. Ce tube centreur 40 est donc de diamètre extérieur sensiblement égal au diamètre intérieur du pré-embouti 7, au jeu près apte à permettre son coulissement dans ce pré-embouti 7, et son diamètre intérieur est sensiblement égal au diamètre du poinçon cylindrique 3, ici encore au jeu près apte à permettre le coulissement de ce poinçon dans ce tube 40.For each unit stamping station (by "unit station - stamping" is meant the elementary stamping station constituted by a punch 3 and a determined die 5), the rigid plate 29 includes a vertical and cylindrical centering tube 40, directed downwards and whose length, relatively small, is slightly greater than the depth of the pre-stamped 7. This tube 40 is placed vertically above the pre-stamped 7, in which it is able to penetrate to ensure its centering, and it must also allow passage to the punch 3 during its vertical movement. This centering tube 40 is therefore of external diameter substantially equal to the internal diameter of the pre-stamped 7, with the clearance close to allowing it to slide in this pre-stamped 7, and its internal diameter is substantially equal to the diameter of the cylindrical punch 3, here still close to play capable of allowing the sliding of this punch in this tube 40.

De part et d'autre, dans le sens transversal, de chaque tube centreur 40, la plaque 29 est équipée de protubérances 41,42, qui sont dirigées vers le bas et qui sont à l'aplomb vertical des barrettes de support 17 et 18. Ces protubérances 41,42 sont de longueur sensiblement égale à légèrement supérieure à celle du tube centreur 40, et elles sont destinées à presser sur les disques 17,18 pour les entraîner dans le mouvement de descente communiqué, par le coulisseau de la presse, à la semelle supérieure 1 et, par l'intermédiaire du vérin d'appui 36, à la plaque rigide 29.On either side, in the transverse direction, of each centering tube 40, the plate 29 is equipped with protrusions 41, 42, which are directed downwards and which are vertically vertical to the support bars 17 and 18 These protrusions 41, 42 are of length substantially equal to slightly greater than that of the centering tube 40, and they are intended to press on the discs 17, 18 to drive them in the lowering movement communicated, by the press slide, to the upper sole 1 and, via the support cylinder 36, to the rigid plate 29.

Le fonctionnement de cet outil sera maintenant décrit à l'aide des figures 1 à 4.The operation of this tool will now be described with the aid of FIGS. 1 to 4.

Partant de la position haute de la figure 1, le coulisseau de la presse amorce sa descente en entraînant la semelle 1 dans le sens de la flèche F. Cette semelle 1 vient presser sur l'extrémité libre de la tige 39 du vérin 36, mais cette tige ne s'enfonce pas, car la pression exercée de bas en haut sur le piston 38 est très supérieure à celle exercée de bas en haut sur la plaque 29 par l'ensemble des ressorts 35. Ces ressorts 35 s'affaissent donc et la plaque 29 descend avec la semelle 1 et le poinçon 3. Dans son mouvement de descente, la plaque 29 entraîne, lorsque les protubérances 41,42 sont arrivées en appui sur les barrettes 17 et 18, les tiges 19 et 20 des vérins 21 et 22, de sort que la bande descend également en entraînant par ailleurs la descente concomitante du disque 16, du fait que la pression exercée sur le piston 14 est assez faible.Starting from the high position of FIG. 1, the press slide starts its descent by driving the sole 1 in the direction of the arrow F. This sole 1 presses on the free end of the rod 39 of the jack 36, but this rod does not sink, because the pressure exerted from bottom to top on the piston 38 is much greater than that exerted from bottom to top on the plate 29 by all of the springs 35. These springs 35 therefore collapse and the plate 29 descends with the sole 1 and the punch 3. In its downward movement, the plate 29 drives, when the protrusions 41, 42 have come to bear on the bars 17 and 18, the rods 19 and 20 of the jacks 21 and 22, so that the strip also descends while also causing the concomitant descent of the disc 16, because the pressure exerted on the piston 14 is quite low.

La figure 2 montre la position obtenue pour les divers éléments lorsque la plaque 29 est parvenue en appui sur la butée inférieure 30 : les tiges 15,19 et 20 des trois vérins 8,21 et 22 sont rentrées au maximum, c'est-à-dire que les disques de support 17 et 18 sont rentrés dans les logements 27 et 28, tandis que le disque de support 16 est en appui sur la face supérieure, alors légèrement rentrée, du piston 9. Le tube centreur 40 est, à ce stade, entré jusqu'au fond du pré-embouti 7.FIG. 2 shows the position obtained for the various elements when the plate 29 has come to bear on the lower stop 30: the rods 15, 19 and 20 of the three jacks 8, 21 and 22 have retracted as much as possible, that is to say -to say that the support discs 17 and 18 have returned to the housings 27 and 28, while the support disc 16 is resting on the upper face, then slightly retracted, of the piston 9. The centering tube 40 is, at this stage, entered to the bottom of the pre-drawn 7.

A partir de la position de la figure 2, la plaque 29 ne peut plus descendre. Comme le coulisseau, et donc la semelle 1, continue sa course descendante, la semelle 1 enfonce la tige 39 dans le corps du vérin 36, tandis que le poinçon 3 pénètre, comme représenté figure 3, dans la matrice 5 en réalisant l'emboutissage de la pièce 7, qu'elle rétrécit en diamètre et augmente en longueur. Au cours de ce mouvement, le piston 9 du vérin 8 est pressé vers le bas, et il suit le mouvement de descente du poinçon 3. La position de la figure 3 correspond sensiblement au point mort bas du coulisseau.From the position of Figure 2, the plate 29 can no longer descend. As the slide, and therefore the sole 1, continues its downward stroke, the sole 1 pushes the rod 39 into the body of the jack 36, while the punch 3 penetrates, as shown in FIG. 3, into the die 5 by drawing of the part 7, which it shrinks in diameter and increases in length. During this movement, the piston 9 of the cylinder 8 is pressed down, and it follows the downward movement of the punch 3. The position of Figure 3 corresponds substantially to the bottom dead center of the slide.

La phase de remontée du coulisseau est schématisée figure 4. Les emboutis 7 enserrent tous très étroitement les poinçons 3, de sorte que la bande 6 remonte avec le poinçon 3, entraînant avec elle les tubes centreurs 40 et donc la plaque rigide 29. Cette dernière arrive alors en appui contre ses butées supérieures de fin de course 31 (position de la figure 4), ce qui stoppe son ascension.The ascent phase of the slide is shown diagrammatically in FIG. 4. The stampings 7 all grip the punches 3 very closely, so that the strip 6 rises with the punch 3, carrying with it the centralizing tubes 40 and therefore the rigid plate 29. The latter then comes to bear against its upper end-of-travel stops 31 (position in FIG. 4), which stops its ascent.

Le poinçon 3 continuant sa remontée, les tubes 40 jouent le rôle d'extracteurs pour les emboutis 7, de sorte que les poinçons sortent des emboutis 7, alors que les barrettes d'appui 17,18 sont revenues en position haute.The punch 3 continuing its ascent, the tubes 40 play the role of extractors for the stampings 7, so that the punches come out of the stampings 7, while the support bars 17, 18 have returned to the high position.

Au point mort haut du coulisseau, la bande 6 est avancée d'un pas dans le sens longitudinal, de sorte que l'on est finalement ramené à la configuration de la figure 1.At the top dead center of the slide, the strip 6 is advanced one step in the longitudinal direction, so that we are finally brought back to the configuration of FIG. 1.

Bien entendu, l'invention n'est pas limitée à l'exemple de réali­sation qui vient d'être décrit, cet outil étant bien du contraire susceptible d'être réalisé sous de nombreuses formes équivalentes. Par exemple, les vérins 36,21 et 24 pourraient être remplacés par des ressorts de répulsion, et les ressorts 35 par un ou plusieurs vérins.Of course, the invention is not limited to the embodiment which has just been described, this tool being quite the contrary likely to be produced in many equivalent forms. For example, the cylinders 36, 21 and 24 could be replaced by repulsion springs, and the springs 35 by one or more cylinders.

Claims (4)

1 - Outil à suivre pour presse d'emboutissage, cet outil compor­tant, pour chaque poste unitaire d'emboutissage (3,5), un poinçon (3) porté par la semelle supérieure (1) de l'outil, elle-même fixée au coulisseau de la presse, et comportant aussi une semelle inférieure (2), fixée sur la table de la presse, cette semelle inférieure portant une plaque (4) porte-matrices (5), chaque orifice vertical d'emboutissage (8) comportant un piston (9) poussé de bas en haut par un dispositif de répulsion élastique (8-10), caractérisé en ce qu'il est équipé de deux moyens complémentaires :
- des moyens (16,17,18) de soutien de la bande métallique (6) placés, les premiers (16) sous le fond de chaque pré-embouti (7), lorsque celui-ci est à l'aplomb du poinçon (3) et de l'orifice d'emboutissage (8) de la matrice associée (5), et les seconds (17,18) de part et d'autre de ce pré-embouti (7), ces moyens (16,17,18) étant faiblement repoussés élasti­quement de bas en haut et étant escamotables verticalement par une pression exercée sur eux du haut en bas ; et
- des moyens (40) d'appui vertical sur la bande (6), de centrage des pré-emboutis (7), et d'extraction des emboutis lors de la remontée du poinçon (3), ces moyens étant constitués par une plaque rigide horizontale (29), qui est libre de se déplacer verticalement entre deux butées (30,31) tout en étant repoussée élastiquement vers le haut, cette plaque rigide (29) étant placée entre ladite bande métallique (6) et la semelle supérieure (1) et portant un organe (36) d'appui vertical élastique contre la semelle supérieure (1), cet organe (36) étant très fortement repoussé de bas en haut, cette plaque rigide (29) comportant en outre, pour chaque post unitaire d'embou­tissage (3,5), un tube vertical de centrage (40), dirigé vers le bas et apte à être traversé, en coulissement étroit, par le poinçon (3) lors de sa descente, et à venir s'encastrer étroitement, lorsque cette plaque rigide descend sous la pression de la semelle (1) sur l'organe d'appui précité (36), dans ledit pré-embouti (7), et cette plaque rigide (29) comportant enfin des protubé­rances verticales (41,42) dirigées vers le bas et aptes à venir en appui sur chacun desdits moyens (17,18) de soutien de la bande (6) qui sont placés de part et d'autre des pré-emboutis (7).1 - Tool to be followed for a stamping press, this tool comprising, for each unitary stamping station (3,5), a punch (3) carried by the upper sole (1) of the tool, itself fixed to the press slide, and also comprising a lower sole (2), fixed to the press table, this lower sole carrying a die-carrying plate (4) (5), each vertical drawing orifice (8) comprising a piston (9) pushed from bottom to top by an elastic repulsion device (8-10), characterized in that it is equipped with two complementary means:
- Means (16, 17, 18) for supporting the metal strip (6) placed, the first (16) under the bottom of each pre-stamped (7), when the latter is perpendicular to the punch ( 3) and the stamping orifice (8) of the associated die (5), and the second (17,18) on either side of this pre-stamped (7), these means (16,17 , 18) being slightly pushed elastically from bottom to top and being retractable vertically by a pressure exerted on them from top to bottom; and
- Means (40) for vertical support on the strip (6), for centering the pre-stamps (7), and for extracting the stamps during the ascent of the punch (3), these means being constituted by a plate rigid horizontal (29), which is free to move vertically between two stops (30,31) while being pushed elastically upwards, this rigid plate (29) being placed between said metal strip (6) and the upper sole ( 1) and carrying an elastic vertical support member (36) against the upper sole (1), this member (36) being very strongly pushed from bottom to top, this rigid plate (29) further comprising, for each unit post stamping (3,5), a vertical centering tube (40), directed downwards and capable of being traversed, in narrow sliding, by the punch (3) during its descent, and coming to be fitted tightly , when this rigid plate descends under the pressure of the sole (1) on the abovementioned support member (36), in said pre-stamped (7), and this rigid plate (29) finally comprising vertical protrusions (41,42) directed downwards and capable of coming to bear on each of said means (17,18) for supporting the strip (6) which are placed on either side 'other of the pre-stamped (7). 2 - Outil à suivre selon la revendication 1, caractérisé en ce que le corps du piston (9), placé dans l'orifice d'emboutissage (8), est creux et constitue le corps d'un vérin à simple effet alimenté par un orifice 12 qui met en communication la chambre (13) de ce vérin avec l'espace (11) situé sous ce piston et alimenté en fluide comprimé, l'extrémité libre de la tige (15) de ce vérin portant lesdits premiers moyens de soutien (16).2 - Tool to be followed according to claim 1, characterized in that the body of the piston (9), placed in the drawing orifice (8), is hollow and constitutes the body of a single-acting cylinder supplied by a orifice 12 which connects the chamber (13) of this jack with the space (11) located under this piston and supplied with compressed fluid, the free end of the rod (15) of this jack carrying said first support means (16). 3 - Outil à suivre selon la revendication 1 ou la revendication 2, caractérisé en ce que lesdits seconds moyens de soutien (17,18) sont constitués par des barrettes horizontales et longitudinales qui sont montées à l'extrémité libre des tiges verticales (19,20) de vérins (21,22) ménagés dans le corps de la semelle inférieure (2).3 - Tool to follow according to claim 1 or claim 2, characterized in that said second support means (17,18) are constituted by horizontal and longitudinal bars which are mounted at the free end of the vertical rods (19, 20) of cylinders (21, 22) formed in the body of the lower sole (2). 4 - Outil à suivre selon la revendication 3, caractérisé en ce que la plaque porte-matrices (4) est pourvue de saignées longitudinales (27,28) aptes à servir de logements pour les barrettes (17,18) lorsqu'elles sont en position basse.4 - Tool to follow according to claim 3, characterized in that the die-carrying plate (4) is provided with longitudinal grooves (27,28) capable of serving as housings for the bars (17,18) when they are in low position.
EP88420426A 1988-01-04 1988-12-20 Progressive die for a deep drawing press Expired - Lifetime EP0323792B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420426T ATE63845T1 (en) 1988-01-04 1988-12-20 SUBSEQUENT TOOL FOR DEEP DRAWING PRESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8800222 1988-01-04
FR8800222A FR2625454A1 (en) 1988-01-04 1988-01-04 TOOL FOR FILLING PRESS

Publications (2)

Publication Number Publication Date
EP0323792A1 true EP0323792A1 (en) 1989-07-12
EP0323792B1 EP0323792B1 (en) 1991-05-29

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EP88420426A Expired - Lifetime EP0323792B1 (en) 1988-01-04 1988-12-20 Progressive die for a deep drawing press

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US (1) US4914936A (en)
EP (1) EP0323792B1 (en)
AT (1) ATE63845T1 (en)
CA (1) CA1298521C (en)
DE (1) DE3863067D1 (en)
ES (1) ES2022693B3 (en)
FR (1) FR2625454A1 (en)

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CN101947591A (en) * 2010-08-27 2011-01-19 哈尔滨工业大学 High-temperature deep drawing method for plate by quickly taking member through member taking supporting plate
CN102151745A (en) * 2011-02-23 2011-08-17 吴江市变压器厂有限公司 Blanking die for hood-type clamping piece lifting plate
WO2015136168A1 (en) * 2014-03-11 2015-09-17 Peugeot Citroen Automobiles Sa Die with ejector for stamped piece with a gutter at the edge
CN105363923A (en) * 2015-12-15 2016-03-02 中铁隆昌铁路器材有限公司 Final molding tool of omega-shaped elastic strips in automatic production
CN105750412A (en) * 2014-12-16 2016-07-13 天津市华美金属制品有限公司 One-time deep-drawing forming device for magnetic conductive bowl of loudspeaker

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GB2038690A (en) * 1978-11-20 1980-07-30 Mercer Nairne & Co Ltd Improved punch assembly
DE8413860U1 (en) * 1984-05-07 1984-12-13 Herion-Werke Kg, 7012 Fellbach DEVICE FOR CONTROLLING DRAWING PILLOWS

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101947591A (en) * 2010-08-27 2011-01-19 哈尔滨工业大学 High-temperature deep drawing method for plate by quickly taking member through member taking supporting plate
CN101947591B (en) * 2010-08-27 2012-02-29 哈尔滨工业大学 High-temperature deep drawing method for plate by quickly taking member through member taking supporting plate
CN102151745A (en) * 2011-02-23 2011-08-17 吴江市变压器厂有限公司 Blanking die for hood-type clamping piece lifting plate
WO2015136168A1 (en) * 2014-03-11 2015-09-17 Peugeot Citroen Automobiles Sa Die with ejector for stamped piece with a gutter at the edge
FR3018465A1 (en) * 2014-03-11 2015-09-18 Peugeot Citroen Automobiles Sa MATRIX WITH EJECTOR FOR EMBOUTIZER WITH GUTTER IN EDGE
CN106102947A (en) * 2014-03-11 2016-11-09 标致雪铁龙集团 For having the mould with backing-out punch of the stamping parts of rim channel
CN105750412A (en) * 2014-12-16 2016-07-13 天津市华美金属制品有限公司 One-time deep-drawing forming device for magnetic conductive bowl of loudspeaker
CN105363923A (en) * 2015-12-15 2016-03-02 中铁隆昌铁路器材有限公司 Final molding tool of omega-shaped elastic strips in automatic production

Also Published As

Publication number Publication date
FR2625454A1 (en) 1989-07-07
ES2022693B3 (en) 1991-12-01
EP0323792B1 (en) 1991-05-29
DE3863067D1 (en) 1991-07-04
CA1298521C (en) 1992-04-07
US4914936A (en) 1990-04-10
ATE63845T1 (en) 1991-06-15

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