EP2701862B1 - Procédé et dispositif pour fabriquer de pièces embouties dotées d'une bride en les ébarbant simultanément - Google Patents

Procédé et dispositif pour fabriquer de pièces embouties dotées d'une bride en les ébarbant simultanément Download PDF

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Publication number
EP2701862B1
EP2701862B1 EP12717670.9A EP12717670A EP2701862B1 EP 2701862 B1 EP2701862 B1 EP 2701862B1 EP 12717670 A EP12717670 A EP 12717670A EP 2701862 B1 EP2701862 B1 EP 2701862B1
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EP
European Patent Office
Prior art keywords
region
blank
cutting edge
drawing die
flange
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Application number
EP12717670.9A
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German (de)
English (en)
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EP2701862A1 (fr
Inventor
Thomas Flehmig
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ThyssenKrupp Steel Europe AG
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ThyssenKrupp Steel Europe AG
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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/30—Deep-drawing to finish articles formed by deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming

Definitions

  • the invention relates to a method and an apparatus for producing flanged drawn parts from a flat and / or preformed metal board using a drawing die with at least one cutting edge, a blank holder and a drawing die, wherein the drawing die a frame portion, a flange portion and a support area for has the board, the board placed on the support area of the drawing die and formed by retracting the draw punch in the drawing die in the drawn part and simultaneously cut at the flange.
  • the invention relates to a device for producing flanged drawn parts with a drawing punch, which has at least one cutting edge, at least one hold-down and a drawing die with a flange portion in which the flange is formed, a frame portion and bottom portion, in which Zargen- and bottom portion formed and a support area for the board before the drawing process.
  • Deep-drawing presses do not have a high-precision tool guide, so that trimming operations in such presses are not possible or can only be carried out very difficult and expensive.
  • WO 2008/025387 A1 discloses a method and a tool for hot working a circuit board, wherein cutting elements are provided in the dies of the tool. With the cutting elements, a trimming of the workpiece can be carried out simultaneously with the drawing process.
  • the DE 10 2006 026 805 A1 discloses an apparatus and method for hot working a semi-finished product having a die, a punch and a blank holder.
  • a cutting device is provided on the punch and die, which cuts the semi-finished during forming.
  • the present invention has therefore set itself the task of providing a method and an apparatus for producing flanged drawn parts with process-integrated trimming, which or a simpler construction of the tool, a self-centering system and at the same time a process-reliable, dimensionally accurate production of allows flange-drawn parts.
  • the object of a method is achieved in that the Bearing area increased relative to the flange and fixed, wherein the height difference corresponds to at least the wall thickness of the formed sheet, during the retraction of the drawing die in the drawing die the cutting punch provided on the cutting edge with a provided at the transition between support area and flange area rounding, so that over the flange area projecting areas of the board are separated during the further drawing process.
  • the support area is raised in relation to the flange area and formed in a fixed manner, so that the tool as a whole can be of considerably simplified construction. Because the height difference between the support area and the flange area of the die corresponds at least to the thickness of the board, a perfect cutting process with the cutting edge of the drawing punch or the drawing die can be ensured. In addition, the fact that the at least one provided on the drawing punch Cutting edge engages with the provided between the support portion and flange portion rounding before completion of the drawing process, allows, in contrast to the conventional method, the flange portion is cut before the completion of the drawing operation.
  • the method thus allows a particularly simple design of the tool, which manages without height-shifting areas and offers high flexibility of the arrangement of the flange.
  • the infeed of the board during the drawing process can be controlled or adjusted via the height difference between the support area and the flange area as well as over the flange area width.
  • the material flow during the drawing process and trimming is easily controllable in that the hold-down presses the region of the board to be severed during the drawing process and trimming the region of the board to be cut off onto the support region of the drawing die.
  • the tensile load of the board during trimming thereby adjusted and thus influence the Cutting quality are taken.
  • the semifinished product can in particular be clamped and stretched wrinkle-free.
  • the rounding along the cutting line has a varying engagement height with the cutting edge of the drawing punch, wherein the board is continuously cut during the retraction of the draw punch into the drawing die, starting from the areas of the curves which are first engaged with the cutting edge of the drawing punch becomes.
  • the cutting forces and the cutting stroke can be reduced significantly.
  • the engagement height varying along the cutting line with the cutting edge of the drawing punch of the rounding ensures that the cutting edge of the drawing punch comes into engagement with the round at different timings of the drawing punch, so that the trimming of the board respectively first into the first engaged Begins areas of rounding and then propagates continuously towards the other areas.
  • the cutting line formed by the rounding with the cutting edge can then have, for example, a wavy course or an inclined course.
  • the rounding has a radius of at least 0.5 mm.
  • a cutting edge with a maximum radius of 0.5 mm.
  • the tool Due to the interaction of the cutting edge (sharp edge) with the rounding, the tool is self-centering and thus positively influences the cutting quality.
  • the dimensional accuracy of the manufactured, flanged drawn parts can be further improved in a further embodiment of the method according to the invention that the board is pulled into a preform before pulling in the drawing die in a Vorziehgesenk and the preformed board provides a surplus of material, so that upon reaching the end position of the Drawing die the finished shaped and trimmed board is calibrated.
  • the excess material can preferably be provided in the bottom region and / or in the drawing radius.
  • the process can be further improved by hot-working the board in the drawing die.
  • this is also optional for the preforming process.
  • the blanks are heated to austenitizing temperature, thermoformed and rapidly cooled so that the drawn part is press hardened.
  • lower forming forces result, on the other hand, a structure which is advantageous for the forming and which permits large degrees of deformation.
  • the hot forming is used in blanks made of higher-strength or ultrahigh-strength steels, for example of the 22MnB5 type.
  • the method according to the invention it is also possible, according to a further embodiment of the method according to the invention, to leave material along the cutting line, preferably in the form of webs, in other words. to produce an interrupted cutting line, whereby the drawn part is at least partially still connected to the trim area and at the same time can be removed from the tool (scrap removal via webs). In a further separation process, the cut area can be separated from the good part.
  • a slit semifinished product which has at least one slot, preferably at least two slits in the trimming area, which extends from an edge of the semi-finished product to the cutting line, whereby the trimming area is divided into several individual parts during the trimming (Scrap division) and thus the bad part can be removed more easily from the tool, for example by means of scrap chutes.
  • the object is achieved by a device in that the support area is increased and fixed with respect to the flange area, wherein the height difference between the support area and the flange portion of the drawing die corresponds at least to the wall thickness of the board to be formed, between Supporting portion and the flange portion is provided a rounding, which is in engagement with a cutting punch provided on the cutting edge and allows trimming of the board during the drawing process.
  • the device according to the invention does not require a height-adjustable drawing die, so that the costs for the production of the train can be significantly reduced.
  • the difference in height between the support area of the board and the flange area allows the flange of the drawn part to be formed very precisely into the flange area after it has been trimmed.
  • the device allows a greater flexibility with respect to the orientation of the flange portion relative to the frame portion is achieved. The cost-effective tool with its simple design reduces wear and thus the cost of producing precise, flanged drawing parts.
  • the indentation of the flange area of the drawn part can be controlled or adjusted via the height difference or over the flange width.
  • a larger height difference between support area and flange area allows more material to be provided here and the flange area to have less feed.
  • a minimum indentation must be ensured so that the drawn drawn part can still be removed from the tool.
  • the rounding has an inlet radius of at least 0.5 mm.
  • the precision of trimming the flange of the drawn part is improved in that the cutting edge of the drawing punch has a maximum radius of 0.5 mm.
  • the rounding along the cutting line on a varying engagement height with the cutting edge so that the cutting edge at the beginning of the cutting process only point or area with the rounding engaged.
  • the rounding which varies in its engagement height with the cutting edge, permits a continuous trimming along the cutting line by retracting the drawing punch into the drawing die.
  • the cutting forces and the cutting impact during the drawing process are significantly reduced.
  • the device according to the invention can be further improved in that the support area is connected to the drawing die in a highly precise manner, for example via a pinning, or is formed integrally with the drawing die. If the support area is formed integrally with the drawing die, the drawing die can be produced particularly inexpensively. On the other hand, there are significant advantages in the pinning of the support area with the drawing die in terms of maintenance. In this case, it is possible to replace the support area and possibly rework the rounding or cutting edge of the drawing die in a simple manner.
  • FIG. 1 a first embodiment of a device according to the invention for the production of flanged drawing parts with a drawing punch 1, a drawing die 2 with a flange 3, in which the flange is formed, a frame portion 4 and a bottom portion 5, in which the Zargen- or bottom portions of the drawn part formed be and a support area 6 for supporting the board before the drawing process.
  • the Device on a hold-7 and a rounding 8 between support area 6 and the flange portion 3.
  • the rounding has an inlet radius of at least 0.5 mm, so that the material from the support area 6 can flow unhindered into the flange area.
  • the support area 6 is raised relative to the flange area 3 and formed fixed.
  • h indicates the height difference between the supporting area for the drawing board of the drawing die 6 and the flange area 3 of the drawing die. In the embodiment shown, h is slightly larger than the board thickness.
  • the directional arrows each indicate the direction of movement of the blank holder 7 and the drawing punch 1.
  • the drawing punch 1 also has a cutting edge 9, which preferably has a radius of 0.05 mm. As in Fig. 1 As shown, in the drawing process, the blank 10 is pulled into the drawing die until the cutting edge 9 engages the rounding 8. Preferably, the hold-down is shut down at the beginning of the drawing process, so that it presses the board 10 against the support area 6 of the board. By this measure, the flow of material can be additionally controlled during the drawing process.
  • the drawing punch 1 moves the drawing punch 1, as in Fig. 2 shown, in the end position, the circuit board is cut due to the engagement of the cutting edge 9 of the drawing punch 1 with the rounding 8 of the support portion 6, so that over the flange portion 3 protruding parts of the board 10 are separated from this.
  • the drawing die 2 is particularly simple design and still allows deep drawing with simultaneous trimming of the board.
  • the support area 6 is in the present embodiment formed integrally with the drawing die, which corresponds to a particularly simple embodiment.
  • Fig. 3 now shows in a schematic sectional view of a half of a device 11 for producing a preformed circuit board 12, which provides, for example in the bottom area a surplus of material.
  • the device 11 for producing a preformed circuit board also consists of a die 13 and a drawing punch 14 and a hold-down 15.
  • the preformed board 12 inserted in a device can not only be drawn to the final shape, but also circumcised and calibrated simultaneously.
  • the preformed board 12 can not only be drawn to the final shape, but also circumcised and calibrated simultaneously.
  • the drawing die 2 provided in the bottom region 5 of the drawing die excess material of the preformed board.
  • a cutting edge 8 'and the drawing punch 1 a rounding 9' are provided.
  • Fig. 5 shows schematically a device in the final position of the drawing die with calibrated, preformed board 12. The insertion of the board in the flange area is minimal and thus the drawn part so very accurate.
  • Fig. 6 the rounding 8 between support area 6 and flange area 3 is shown schematically along its section line 8b.
  • the section line 8b of the rounding 8 has a wave-shaped course, so that the cutting edge 9 of the drawing punch at the beginning of the cutting process only point or partially with the rounding 8 engages and the board can be continuously cut by retracting the drawing punch in the drawing die.
  • 8a the target section contour of the rounding 8 is designated, which corresponds to the desired dimension of the board.
  • the representation in Fig. 6 is not to scale. About a calibration, such as in 4 and 5 shown, the rounding can be easily corrected in one step.
  • a sawtooth or a linear profile of the engagement height of the rounding can be used.
  • Fig. 7 has on the left side of the rounding 8 a small inlet radius, for example, 1 mm.
  • the inlet radius is significantly larger, for example, 5 mm. Accordingly, the cutting edge initially engages the left side first and continues its cut to the right side by retracting the draw punch into the die.
  • the cutting gaps which are provided between the cutting edge 9, 8 'and rounding 8, 9', are preferably 0.05 mm to a maximum of 0.2 mm in order to ensure a particularly precise trimming of the board.
  • the cutting edge of the drawing punch preferably has a maximum radius of 0.5 mm, in order to also ensure a particularly precise cutting process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (13)

  1. Procédé destiné à la fabrication de pièces embouties présentant des brides à partir d'une platine (10, 12) de métal plate et/ou préformée, par l'emploi d'un poinçon d'emboutissage (1) comprenant au moins une arête de coupe (9), un serre-flan (7) et une matrice d'emboutissage (2), dans lequel la matrice d'emboutissage (2) présente une zone de châssis (4), une zone à bride (3) ainsi qu'une zone d'appui (6) pour la platine (10), la platine (10) est posée sur la zone d'appui (6) de la matrice d'emboutissage (2) et est transformée en la pièce emboutie et coupée sur la zone à bride (3) lors de la pénétration du poinçon d'emboutissage (1) dans la matrice d'emboutissage, dans lequel la zone d'appui (6) est formée surélevée et fixe par rapport à la zone à bride (3), dans lequel la différence de hauteur (h) entre la zone d'appui (6) et la zone à bride (3) correspond au moins à l'épaisseur de paroi de la platine (10, 12) à mettre en forme,
    caractérisé en ce que
    pendant la pénétration du poinçon d'emboutissage (1) dans la matrice d'emboutissage (2), l'au moins une arête de coupe (9) prévue sur le poinçon d'emboutissage (1) vient en prise avec un arrondi (8) prévu sur le passage entre la zone d'appui (6) et la zone à bride (3), de sorte que des zones de la platine (10, 12) en saillie au-dessus de la zone à bride (3) sont séparées durant la suite de la procédure d'emboutissage.
  2. Procédé selon la revendication 1, caractérisé en ce que pendant la procédure d'emboutissage et la découpe de la platine (10, 12), le serre-flan (7) appuie la zone à séparer de la platine (10, 12) sur la zone d'appui (6) de la matrice d'emboutissage (2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'arrondi (8) présente une hauteur de prise avec l'arête de coupe (9) qui varie le long de la ligne de coupe et la platine (10, 12) est découpée en continu pendant la pénétration du poinçon d'emboutissage (1) dans la matrice d'emboutissage (2), en partant des zones de l'arrondi (8) qui sont d'abord en prise avec l'arête de coupe (9).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'une arête de coupe (9) avec un rayon de maximum 0,5 mm est employée.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'une fente de coupe de 0,05 mm à maximum 0,2 mm est maintenue entre l'arrondi (8) et l'arête de coupe (9).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la platine (10, 12) est emboutie en une préforme dans une matrice de pré-emboutissage (11) avant l'emboutissage dans la matrice d'emboutissage (2) et la platine (12) préformée fournit un excédent de matière de sorte que lorsque le poinçon d'emboutissage (1) atteint la position finale, la platine (12) à la forme finale et découpée est calibrée.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la platine (10, 12) est transformée à chaud dans la matrice d'emboutissage (2).
  8. Dispositif destiné à la fabrication de pièces embouties présentant des brides comprenant un poinçon d'emboutissage (1) qui présente au moins une arête de coupe (9), au moins un serre-flan (7) et une matrice d'emboutissage (2) une zone à bride (3) dans laquelle la bride est formée, une zone de châssis (4) et zone de fond (5), dans laquelle les zones de châssis et de fond sont formées ainsi qu'une zone d'appui (6) pour la platine (10, 12), avant la procédure d'emboutissage, dans lequel la zone d'appui (6) est formée surélevée et fixe par rapport à la zone à bride (3), dans lequel la différence de hauteur (h) entre la zone d'appui (6) et la zone à bride (3) de la matrice d'emboutissage (2) correspond au moins à l'épaisseur de paroi de la platine (10, 12) à mettre en forme,
    caractérisé en ce qu'
    un arrondi (8) est prévu sur le passage entre la zone d'appui (6) et la zone à bride (3), lequel est en prise avec une arête de coupe (9) prévue sur le poinçon d'emboutissage (1) et permet une découpe de la platine (10, 12) pendant la procédure d'emboutissage.
  9. Dispositif selon la revendication 8, caractérisé en ce que l'arrondi (8) présente un rayon initial d'au moins 0,5 mm.
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que l'arête de coupe (9) présente un rayon de maximum 0,5 mm.
  11. Dispositif selon l'une des revendications 8 à 10,
    caractérisé en ce qu'une fente de coupe entre l'arête de coupe (9) et l'arrondi (8) de 0,05 mm à maximum 0,2 mm est prévue.
  12. Dispositif selon l'une des revendications 8 à 10,
    caractérisé en ce que l'arrondi (8) présente une hauteur de prise avec l'arête de coupe (9) qui varie le long de la ligne de coupe, de sorte que l'arête de coupe (9) n'est en prise que par points ou par tronçons avec l'arrondi (8) au début de la procédure d'emboutissage.
  13. Dispositif selon l'une des revendications 8 à 10,
    caractérisé en ce que la zone d'appui (6) est reliée de façon hautement précise à la matrice d'emboutissage (1) ou est conçue d'un seul bloc avec la matrice d'emboutissage (2).
EP12717670.9A 2011-04-29 2012-04-25 Procédé et dispositif pour fabriquer de pièces embouties dotées d'une bride en les ébarbant simultanément Active EP2701862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011050002A DE102011050002A1 (de) 2011-04-29 2011-04-29 Verfahren und Vorrichtung zur Herstellung flanschbehafteter Ziehteile mit gleichzeitigem Beschnitt
PCT/EP2012/057527 WO2012146602A1 (fr) 2011-04-29 2012-04-25 Procédé et dispositif pour fabriquer de pièces embouties dotées d'une bride en les ébarbant simultanément

Publications (2)

Publication Number Publication Date
EP2701862A1 EP2701862A1 (fr) 2014-03-05
EP2701862B1 true EP2701862B1 (fr) 2017-03-29

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Country Link
US (1) US9643231B2 (fr)
EP (1) EP2701862B1 (fr)
JP (1) JP2014512276A (fr)
CN (1) CN103534045B (fr)
DE (1) DE102011050002A1 (fr)
ES (1) ES2630304T3 (fr)
HU (1) HUE032994T2 (fr)
PL (1) PL2701862T3 (fr)
PT (1) PT2701862T (fr)
WO (1) WO2012146602A1 (fr)

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WO2015163418A1 (fr) * 2014-04-25 2015-10-29 本田技研工業株式会社 Dispositif d'usinage de matériau sous forme de plaque et procédé d'usinage de matériau sous forme de plaque
DE102016118419A1 (de) * 2016-09-29 2018-03-29 Thyssenkrupp Ag Verfahren und Vorrichtung zum Herstellen von Bauteilen mit angepasstem Bodenbereich
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CN110216194B (zh) * 2019-06-28 2023-09-15 常州东仕豪机械制造有限公司 支撑管连续模具
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US9643231B2 (en) 2017-05-09
HUE032994T2 (en) 2017-11-28
JP2014512276A (ja) 2014-05-22
US20140047890A1 (en) 2014-02-20
EP2701862A1 (fr) 2014-03-05
CN103534045A (zh) 2014-01-22
ES2630304T3 (es) 2017-08-21
WO2012146602A1 (fr) 2012-11-01
PL2701862T3 (pl) 2017-09-29
DE102011050002A1 (de) 2012-10-31
CN103534045B (zh) 2016-12-28
PT2701862T (pt) 2017-07-11

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