EP2701861B1 - Procédé et dispositif de fabrication de pièces embouties sans bride - Google Patents

Procédé et dispositif de fabrication de pièces embouties sans bride Download PDF

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Publication number
EP2701861B1
EP2701861B1 EP12716437.4A EP12716437A EP2701861B1 EP 2701861 B1 EP2701861 B1 EP 2701861B1 EP 12716437 A EP12716437 A EP 12716437A EP 2701861 B1 EP2701861 B1 EP 2701861B1
Authority
EP
European Patent Office
Prior art keywords
blank
punch
drawing die
cutting edge
board
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.)
Not-in-force
Application number
EP12716437.4A
Other languages
German (de)
English (en)
Other versions
EP2701861B8 (fr
EP2701861A1 (fr
Inventor
Thomas Flehming
Konstantinos Savvas
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Publication of EP2701861A1 publication Critical patent/EP2701861A1/fr
Application granted granted Critical
Publication of EP2701861B1 publication Critical patent/EP2701861B1/fr
Publication of EP2701861B8 publication Critical patent/EP2701861B8/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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 for producing flangeless drawn parts from a flat and / or preformed metal board using a drawing die, a blank holder and a drawing die, wherein the drawing die has at least one support area and at least one Zargen Suite, between which Einlaufrundungen are provided and the Circuit board is trimmed during the drawing process, wherein the trimming of the board using a first cutting edge or rounding of the drawing punch and provided in the support region of the drawing die recess.
  • the invention relates to a device for producing flangeless drawn parts from a flat and / or preformed metal circuit board with a drawing punch, a hold-down, a drawing die with at least one support area, at least one Zargen Suite and Einlaufrundeptept, which are provided between support area and Zargen Suite, wherein the Drawing punch has a first cutting edge or rounding, which is provided with a provided in the support region of the drawing die recess with a rounding or cutting edge in such a way that the board is cut in the support area during the drawing process before the drawing punch reaches its final position, the drawing die and the Drawing punch is designed such that upon reaching the end position of the drawing punch, the board is completely pulled into the Zargen Suite and forms a flangeless drawn part.
  • the trimming of the board takes place in this process during the drawing process in the region of the drawing edge, ie in the region of the inlet rounding between support area and frame area. Since in the region of the drawing edge, ie the inlet rounding between support area and frame area, the material moves toward the bottom area of the drawn part, not only a displacement of the sheet material, but also a displacement of the sheet material by the cutting edge of the drawing punch engaged with the inlet rounding Hardening of the sheet metal material instead This is the reason that it comes in the process integrated cutting of the board during the deep drawing process in the area of the inlet roundings in this process or with this device to an unclean trim. It is pointed out in the cited book that this method only applies, unless it depends on a clean trimming the edges of the drawn part. In other words, the drawn part must be subjected to further post-processing.
  • the WO 2011/083008 A1 describes both a method and a device for producing a half-shell part, wherein the device consists of a drawing punch, a drawing die and a hold-down.
  • the device consists of a drawing punch, a drawing die and a hold-down.
  • a blank can be finished and calibrated to a flangeless half-shell part.
  • a cutting edge arranged on the drawing punch engages with a counter cutting edge arranged on the drawing die, so that the blank is cut at this point.
  • the device has a punch for cutting and pulling the preformed boards.
  • the present invention has the object to provide a method and apparatus for the production of flangeless drawn parts available, with which or with which integrated into the process can be made by pulling and trimming a press stroke flanschlose drawn parts and still have a clean trim.
  • the object indicated above for a method according to the invention achieved in that the board is calibrated after trimming in the drawing die by reaching the end position of the drawing punch using a compression set arranged in the drawing punch.
  • the board is cut in the support area and not in the area of the inlet curves or the drawing edge. This ensures that the cutting direction and the direction of movement of the material of the board can be substantially perpendicular to each other.
  • the board is not immediately solidified by the trimming, so that it comes to a formation of a clean cut edge.
  • By retracting the drawing punch in the drawing die of remaining in the support area part of the board is completely drawn in the Zargen Siemens and a drawn part without flange with a clean cut edge in a press stroke.
  • the inventive method is characterized in particular by a single step and is therefore particularly cost-effective.
  • preformed circuit boards are reshaped, they can, for example, provide an excess of material, for example in the bottom area, so that a calibration of the drawn part upon reaching the end position of the drawing punch is integrated into the process.
  • the trimming is carried out in the transition region between the support area and the drawing radius.
  • the hold-down device is in contact with the area of the circuit board to be separated during the cutting of the circuit board and can thus be used to control the outline of the board.
  • the hold-down can ensure that the material flow is precisely controlled during the cutting process in the support area.
  • a semifinished product can be clamped and stretched wrinkle-free when using a wide hold-down and a support area.
  • the method according to the invention can be carried out by trimming the board using a first cutting edge of the drawing punch and a recess provided in the contact area of the drawing die.
  • the cutting edge arranged in the cutting punch makes it possible to dispense with additional measures, for example an additional cutting punch and a device for controlling the movement of the same.
  • the method can be carried out more cost-effectively due to the simplification of the device.
  • the recess in the drawing die serves to accommodate the trimming of the board and the cutting punch.
  • the trimming of the board is carried out using a provided on the recess of the drawing die cutting edge, which is preferably arranged in the support area or in the transition region between support area and drawing radius.
  • the method is advantageously configured in that, after the trimming in the drawing die, the board is calibrated by reaching the end position of the drawing punch using an upsetting paragraph arranged in the drawing punch.
  • Pruning and calibrating are thus done in a single press stroke in the same fixture.
  • the drawn parts are due to the calibration very accurate and less prone to springback.
  • the board can be additionally draft-free trimmed when moving into the frame area, so that also a very good cut quality is achieved.
  • the regrooving, imprecision due to irregular retraction of the board is reduced to a minimum, so that very dimensionally accurate drawing parts can be produced.
  • the method according to the invention can be further improved by using a drawing punch, which provides the first and / or the second cutting edge via an exchangeable insert in the drawing die and optionally a drawing die is used, which provides the recess in the support area via an exchangeable insert ,
  • a drawing punch which provides the first and / or the second cutting edge via an exchangeable insert in the drawing die and optionally a drawing die is used, which provides the recess in the support area via an exchangeable insert .
  • the first and the second cutting edge and the recess in the support area of the board are exposed to increased wear due to the cutting operations. If these are designed as inserts, which are interchangeable, the wear can be taken into account and in the necessary case the appropriate use can be easily replaced.
  • the first cutting edge is located on the recess in the support area of the drawing die, which can also be provided via a replaceable insert.
  • the drawing punch is in this case also equipped with a replaceable insert which has a rounding in the region of interaction with the cutting edge on the drawing die. The interaction between cutting edge (sharp edge) and rounding causes a self-centering effect, which leads to a good cut quality.
  • 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 above-mentioned object is achieved by a generic device in that the drawing punch has an upsetting paragraph, which after insertion of the board in the Zargen Hoch the board by upsetting at least the Zargenrioss the board when reaching the end position of the drawing die in the drawing die calibrated.
  • the cutting edge enables a clean cut edge to be produced due to the low strength in the sheet.
  • the flangeless drawn part is provided with a clean cut edge and thus clearly dimensionally accurate despite the process-integrated trimming.
  • the upsetting paragraph is inventively designed so that this upsets the frame area against the floor area, so that it too a calibration and thus to an improvement in the dimensional accuracy of the drawn part comes.
  • the compression shoulder of the drawing punch is designed as a second cutting edge, wherein the second cutting edge enables a trimming of the trimmed board during the drawing operation in engagement with the inlet curves.
  • the second cutting edge allows for additional regrooving of the area of the board drawn into the frame area. Since in this case the severed cutting slug is exposed to any tensile loads, this regrooving is done with very high precision. In addition, until the completion of the drawing process due to the Nach68s only very slight inaccuracies due to an irregular collection of the board. As a result, dimensional accuracy of corresponding boards is particularly high.
  • the device according to the invention can be improved in that the recess of the drawing die is formed by a replaceable insert.
  • the recess is, as already stated, subjected to increased wear due to the cutting operations, so that an exchange of the insert only leads to low costs.
  • FIG. 1 in a schematic sectional view of the prior art known method in which during the drawing process with a drawing punch 1, a board 2 deep-drawn and cut in the drawing die 3 simultaneously using a first cutting edge 4 of the drawing punch 1.
  • the board 2 is usually held by a hold-5.
  • the material of the board 2 and the drawing punch 1 is moved in the direction of the arrows shown.
  • the cutting edge 4 generates a solidification due to the different rapid movement in the area 2a of the board 2.
  • the cutting edge 4 separates the board 2 from the remaining part of the board in the area of the inlet rounding between the support area 3a and the frame area 3b. Due to the solidification and the simultaneous tensile load of the board 2 in the cutting area thereby creates an unclean cutting edge, which is avoided by the method according to the invention.
  • Fig. 2a shows a first embodiment of a device according to the invention with a drawing punch 1 ', which transforms a planar board 2' in a drawing die 3 'at the beginning of the drawing process.
  • the cutting edge 4 'of the cutting punch 1' is formed in the present embodiment such that it 'cuts the board 2 in the support area 2a.
  • the trimming can also be done in the transition region between support area and drawing radius. For this purpose, it is engaged with a recess 7 'of the drawing die 3'.
  • the hold-down 5 ' depresses the board 2' during the first cutting operation using the cutting edge 4 'in the support area 2a', so that a controlled trimming of the board 2 'takes place.
  • the first cutting edge 4 'and / or the upsetting paragraph 6' are realized by an exchangeable insert in the cutting punch. This improves the maintenance or reduces the cost when replacing the wear parts of the drawing punch. The same applies even if the recess 7 'is formed using a replaceable insert 8' in the drawing die 3 '.
  • Fig. 3a) and 3b 1) show a further exemplary embodiment of a device according to the invention in a schematic sectional view, which differs from the first exemplary embodiment in that the upset shoulder 6 "is made significantly longer and provided with a second cutting edge.
  • the board 2 is "cut in the support area using the cutting edge 4" .
  • the remaining support area, which is pulled into the frame area 2b ", is additionally formed by the upset forming as a cutting edge bevel 6", which in comparison to the embodiment of Fig. 2 longer, recut.
  • the cutting piece falls 10 "on Fig. 3b ), the cutting slug 10 "is not under tension so that a clean separation of the cutting slug 10" is made possible. This ensures a very good cut quality.
  • the board 2 is retracted only slightly in the drawing die 3" after the trimming, so that a particularly high dimensional accuracy of the flangeless drawn part is made possible.
  • a flangeless drawn part can be drawn, cut, recut and also calibrated. This leads to a particularly economical production of flangeless, high-tensile drawn parts.
  • influence can also be exerted on the entry of the board to be reshaped, in which the trimming is displaced locally in the direction of the support area, ie in opposite directions to the drawing radius and / or in which a locally varying in height support area is used.
  • the feeder can be controlled or adjusted, corrected or compensated.

Landscapes

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

Claims (9)

  1. Procédé destiné à produire des pièces embouties sans bride à partir d'une platine (2', 2") métallique plane et/ou préfaçonnée, en utilisant un poinçon d'emboutissage (1', 1"), un serre-flan (5', 5") et une matrice d'emboutissage (3', 3"), la matrice d'emboutissage (3', 3") comportant au moins une zone d'appui (3a', 3a") et au moins une zone d'encadrement (3b', 3b") entre lesquelles sont prévus des arrondis d'engagement et la platine (2', 2") étant ébarbée pendant l'opération d'emboutissage,
    alors que l'opération d'emboutissage n'est pas encore achevée, la platine (2', 2") étant ébarbée dans la zone d'appui (3a', 3a"), de telle sorte que pendant la poursuite de l'introduction du poinçon d'emboutissage (1', 1") dans la matrice d'emboutissage (3', 3"), la partie de la platine (2', 2") qui reste dans la zone d'appui (3a', 3a") après l'ébarbage soit tirée entièrement dans la zone d'encadrement (3b', 3b") de la matrice d'emboutissage (3', 3"),
    l'ébarbage de la platine (2', 2") s'effectuant en utilisant une première arête de coupe (4', 4") ou un arrondi du poinçon d'emboutissage (1', 1") et une cavité (7', 7") prévu dans la zone d'appui (3a', 3a") de la matrice d'emboutissage (3', 3"),
    caractérisé en ce
    qu'après l'ébarbage dans la matrice d'emboutissage (3', 3"), la platine (2', 2") est calibrée par l'atteinte de la position finale du poinçon d'emboutissage (1', 1"), en utilisant un talon de refoulement (6', 6"), placé dans la poinçon d'emboutissage (1', 1").
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    pendant l'ébarbage de la platine (2', 2"), le serre-flan (5', 5") est en contact avec la zone de la platine (2', 2") qui doit être sectionnée.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    l'ébarbage de la platine (2', 2") s'effectue en utilisant une arête de coupe prévue sur la cavité de la matrice d'emboutissage (3', 3").
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce
    qu'après l'ébarbage de la platine (2") dans la zone d'appui (3a"), il s'effectue un arasage de la platine (2") par le talon de refoulement (6") du poinçon d'emboutissage (1") conçu en tant que deuxième arête de coupe, lequel est en engagement avec les arrondis d'introduction de la matrice d'emboutissage (3").
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce
    qu'il est utilisé un poinçon d'emboutissage (1', 1") qui met à disposition la première et/ou la deuxième arête d'emboutissage (4', 4", 6', 6") par l'intermédiaire d'un insert interchangeable (9', 9") dans le poinçon d'emboutissage (1', 1") et il est utilisé en option une matrice d'emboutissage (3', 3"), laquelle met à disposition la cavité (7', 7") dans la zone d'appui (3a', 3a") par l'intermédiaire d'un insert interchangeable (8', 8").
  6. Dispositif destiné à produire des pièces embouties sans bride à partir d'une platine métallique (2', 2") plane et/ou préfaçonnée pour la réalisation d'un procédé selon la revendication 1 à 5, avec un poinçon d'emboutissage (1', 1"), un serre-flan (5', 5") et une matrice d'emboutissage (3', 3") avec au moins une zone d'appui (3a', 3a"), au moins une zone d'encadrement (3b', 3b") et des arrondis d'introduction, lesquels sont prévus entre la zone d'appui (3a', 3a") et la zone d'encadrement (3b', 3b"),
    le poinçon d'emboutissage (1', 1") comportant une première arête de coupe ou un arrondi, lequel est en engagement avec une cavité (7', 7") prévu dans la zone d'appui (3a', 3a") de la matrice d'emboutissage (3', 3") avec un arrondi ou une arête de coupe, de telle sorte que la platine (2', 2") soit ébarbée dans la zone d'appui (3a', 3a") pendant l'opération d'emboutissage, avant que le poinçon d'emboutissage (1', 1") n'atteigne sa position finale, la matrice d'emboutissage (3', 3") et le poinçon d'emboutissage (1', 1") étant conçus de telle sorte qu'à l'atteinte de la position finale du poinçon d'emboutissage (1', 1"), la platine (2', 2") soit entièrement tirée dans la zone d'encadrement (3b', 3b") et forme une pièce emboutie sans bride,
    caractérisé en ce que
    le poinçon d'emboutissage (1', 1") comporte un talon de refoulement, lequel après introduction de la platine (2', 2") dans la zone d'encadrement (3b', 3b") calibre la platine (2', 2") par refoulement d'au moins la zone d'encadrement (3b', 3b") de la platine (2', 2"), à l'atteinte de la position finale du poinçon d'emboutissage (1', 1") dans la matrice d'emboutissage (3', 3").
  7. Dispositif selon la revendication 6,
    caractérisé en ce que
    le talon de refoulement (6") du poinçon d'emboutissage (1") est conçu en tant que deuxième arête de coupe et la deuxième arête de coupe permet un arasage de la platine (2") ébarbée pendant l'opération d'emboutissage, en engagement avec les arrondis d'introduction.
  8. Dispositif selon la revendication 6 ou 7,
    caractérisé en ce que
    des inserts interchangeables (8', 8") sont prévus pour la mise à disposition de la cavité dans la matrice d'emboutissage (3', 3").
  9. Dispositif selon l'une quelconque des revendications 6 à 8,
    caractérisé en ce que
    des inserts interchangeables (9', 9") sont prévus pour la mise à disposition de la première arête de coupe (4', 4") et/ou du talon de refoulement (6', 6") du poinçon d'emboutissage (1', 1").
EP12716437.4A 2011-04-29 2012-04-25 Procédé et dispositif de fabrication de pièces embouties sans bride Not-in-force EP2701861B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011050001A DE102011050001A1 (de) 2011-04-29 2011-04-29 Verfahren und Vorrichtung zur Herstellung von flanschlosen Ziehteilen
PCT/EP2012/057526 WO2012146601A1 (fr) 2011-04-29 2012-04-25 Procédé et dispositif de fabrication de pièces embouties sans bride

Publications (3)

Publication Number Publication Date
EP2701861A1 EP2701861A1 (fr) 2014-03-05
EP2701861B1 true EP2701861B1 (fr) 2016-09-14
EP2701861B8 EP2701861B8 (fr) 2016-12-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12716437.4A Not-in-force EP2701861B8 (fr) 2011-04-29 2012-04-25 Procédé et dispositif de fabrication de pièces embouties sans bride

Country Status (6)

Country Link
US (1) US20140047891A1 (fr)
EP (1) EP2701861B8 (fr)
JP (1) JP5801950B2 (fr)
CN (1) CN103534046B (fr)
DE (1) DE102011050001A1 (fr)
WO (1) WO2012146601A1 (fr)

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DE102016118418A1 (de) * 2016-09-29 2018-03-29 Thyssenkrupp Ag Verfahren zur Herstellung eines geformten Bauteils mit einem maßhaltigen Zargenbereich
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Publication number Publication date
WO2012146601A1 (fr) 2012-11-01
US20140047891A1 (en) 2014-02-20
EP2701861B8 (fr) 2016-12-21
DE102011050001A1 (de) 2012-10-31
JP5801950B2 (ja) 2015-10-28
CN103534046A (zh) 2014-01-22
EP2701861A1 (fr) 2014-03-05
JP2014512275A (ja) 2014-05-22
CN103534046B (zh) 2016-08-24

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