EP2785477B1 - Device and method for machining a workpiece consisting of metal, particularly for producing a cup-shaped component for the automobile industry - Google Patents

Device and method for machining a workpiece consisting of metal, particularly for producing a cup-shaped component for the automobile industry Download PDF

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Publication number
EP2785477B1
EP2785477B1 EP13711617.4A EP13711617A EP2785477B1 EP 2785477 B1 EP2785477 B1 EP 2785477B1 EP 13711617 A EP13711617 A EP 13711617A EP 2785477 B1 EP2785477 B1 EP 2785477B1
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Prior art keywords
forming
die
phase
area
outer die
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EP13711617.4A
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German (de)
French (fr)
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EP2785477A1 (en
Inventor
Peter König
Michael Wolf
Ottmar Lehr
Klaus LEINMÜLLER
Dieter Waidmann
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Allgaier Werke GmbH and Co KG
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Allgaier Werke GmbH and Co KG
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Priority to RS20170726A priority Critical patent/RS56287B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04Blank holders; Mounting means therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10Devices controlling or operating blank holders independently, or in conjunction with dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/18Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • B21D51/22Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like pots, e.g. for cooking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • B21D22/22Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the invention relates to the field of machining workpieces of metal, for example of steel or other metals. It relates to a device for forming according to claim 1, a system for forming according to claim 6, and a method for forming according to claim 7.
  • the machining of a workpiece may include any operations, such as cutting, pressing, pulling, deforming.
  • Pot-shaped components include a bottom, a pot wall and a drawing edge. Such a component is often used as a spring cup to accommodate the ends of a coil spring. They find particular use in the automotive industry in many ways.
  • thermoforming tool for deep drawing of molded parts.
  • This comprises an annular clamping device for clamping a circuit board.
  • the clamping device encloses a space in which a bottom former and a frame former can be moved in the pulling direction. These two can have different speeds. As a result, a higher dimensional accuracy is to be achieved.
  • DE 27 27 174 C2 describes a method and apparatus for deep-drawing an aluminum container. Two parts are movable against each other, namely a punch and a die. The speed of the upwardly moving punch can be greater than the speed of the moving down die. As a result, a large thermoforming ratio is to be achieved.
  • Relative speed between punch and die increased compared to the speed during the deforming phase.
  • the punch performs a movement against the phase of deforming during the reforming phase.
  • the speeds of the punch during these phases are unequal.
  • US 2008/0098789 A1 describes a method and an apparatus for forming a sheet metal blank with a two-stage sheet metal posture.
  • the invention has for its object to make a device, a system, a method and a workpiece such that high-strength steels are deformable without tearing occurs in the edge regions, and that a greater draw depth than previously achieved
  • the inner die may have a higher speed than the outer die.
  • the speed differences can be significant.
  • the speed of the inner die may be 1.5, 2, 2.5, or 3 times the speed of the outer die.
  • pulling device comprises a punch 1 and a blank holder 2.
  • the punch 1 is of slightly conical shape. It has a bottom mold surface 1.1 and a wall mold surface 1.2.
  • Stamp 1 is surrounded by a blank holder 2.
  • Sheet metal holder 2 has a support surface 2.1.
  • Sheet holder 2 is annular.
  • an inner die 3 This is at least approximately cylindrical. It is surrounded by an outer die 4. This is ring-shaped.
  • the inner die 3 in turn has a bottom mold surface 3.1.
  • the outer die 4 is annular. It has a wall mold surface 4.1, further a clamping surface 4.2 for clamping the drawing edge 5.3 of a workpiece 5 on the support surface 2.1 of the sheet holder 2.
  • the workpiece 5 has emerged from a circular disk-shaped board. See also Fig. 2 , It comprises a bottom 5.1, a wall 5.2, and the drawing edge 5.3.
  • clamping surface 4.2 of the outer die 4 is located approximately at the height of the bottom mold surface 3.1 of the inner die 3. At about the same height is the support surface 2.1 of the sheet holder. 2
  • a workpiece 5 is inserted into the pulling device and clamped between the support surface 2.1 and the clamping surface 4.2.
  • the inner die 3 and the outer die 4 move together with the preformed workpiece, as well as the sheet holder 2 in the arrow direction down.
  • the parts mentioned inner die 3, outer die 4, blank holder 2 and preformed workpiece have the same speed.
  • the outer die 4 overtakes the inner die 3.
  • FIG. 1 The drawing apparatus shown is only one station of a series of drawing stations. These are not shown here. In practice, they are connected in series in a workshop.
  • the invention is described with regard to the production of a pot-shaped component. It is understood, however, that deviating from the cup shape hollow body can be made with it.
  • the dies may have shapes that differ from the shapes of a disk and a ring described.

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

Description

Die Erfindung betrifft das Gebiet des Bearbeitens von Werkstücken aus Metall, beispielsweise aus Stahl oder anderen Metallen. Sie betrifft eine Vorrichtung zum Umformen entsprechend Anspruch 1, eine Anlage zum Umformen entsprechend Anspruch 6, sowie ein Verfahren zum Umformen entsprechend Anspruch 7.The invention relates to the field of machining workpieces of metal, for example of steel or other metals. It relates to a device for forming according to claim 1, a system for forming according to claim 6, and a method for forming according to claim 7.

Das Bearbeiten eines Werkstückes kann jegliche Vorgänge umfassen, beispielsweise das Schneiden, Pressen, Ziehen, Verformen.The machining of a workpiece may include any operations, such as cutting, pressing, pulling, deforming.

Topfförmigen Bauteile umfassen einen Boden, eine Topfwand sowie einen Ziehrand. Ein solches Bauteil wird häufig als Federtopf verwendet, um die Enden einer Spiralfeder aufzunehmen. Sie finden besonders in der Automobilindustrie vielfache Verwendung.Pot-shaped components include a bottom, a pot wall and a drawing edge. Such a component is often used as a spring cup to accommodate the ends of a coil spring. They find particular use in the automotive industry in many ways.

Problematisch bei der Herstellung solcher Federtöpfe sind hochfeste Stähle. Diese haben zwar den Vorteil, dass sie extrem hohe Zugfestigkeiten aufweisen, und dass daher Stähle geringerer Dicke verwendet werden können, und somit auch geringeren Gewichtes. Solche Stähle sind jedoch relativ spröde und neigen zum Reißen. Dies tritt insbesondere beim Umformen an den hochbeanspruchten Übergangsbereichen auf. Das Reißen tritt insbesondere im Übergangsbereich zwischen Topfboden und Topfwand sowie zwischen Topfwand und Ziehrand auf.Problematic in the production of such spring pots are high-strength steels. Although these have the advantage that they have extremely high tensile strengths, and therefore steels smaller thickness can be used, and thus also lower weight. However, such steels are relatively brittle and tend to crack. This occurs especially when forming on the highly stressed transition areas. The tearing occurs in particular in the transition region between the bottom of the pot and the pot wall and between the pot wall and the drawing edge.

DE 102 54 103 B3 beschreibt ein Tiefziehwerkzeug zum Tiefziehen von Formteilen. Dieses umfasst eine ringförmige Spanneinrichtung zum Einspannen einer Platine. Die Spanneinrichtung umschließt einen Raum, in welchem ein Bodenformer sowie ein Zargenformer in Ziehrichtung verfahrbar sind. Diese beiden können unterschiedliche Geschwindigkeiten aufweisen. Hierdurch soll eine höhere Formgenauigkeit erreicht werden. DE 102 54 103 B3 describes a thermoforming tool for deep drawing of molded parts. This comprises an annular clamping device for clamping a circuit board. The clamping device encloses a space in which a bottom former and a frame former can be moved in the pulling direction. These two can have different speeds. As a result, a higher dimensional accuracy is to be achieved.

DE 27 27 174 C2 beschreibt ein Verfahren und eine Vorrichtung zum Tiefziehen eines Aluminiumbehälters. Dabei sind zwei Teile gegeneinander verfahrbar, nämlich ein Stempel und eine Matrize. Die Geschwindigkeit des nach oben sich bewegenden Stempels kann dabei größer sein, als die Geschwindigkeit der sich abwärts bewegenden Matrize. Hierdurch soll ein großes Tiefziehverhältnis erreicht werden. DE 27 27 174 C2 describes a method and apparatus for deep-drawing an aluminum container. Two parts are movable against each other, namely a punch and a die. The speed of the upwardly moving punch can be greater than the speed of the moving down die. As a result, a large thermoforming ratio is to be achieved.

DE 10 2007 050 581 A1 beschreibt ein Verfahren zum Beeinflussen des Blechdickenverlaufes beim Tiefziehen von Hohlkörpern. Dabei geht es um ein mehrfaches Wölben (Deformieren) und Rückwölben (Reformieren) eines Werkstückes. Während der Phase des Reformierens wird die DE 10 2007 050 581 A1 describes a method for influencing the thickness of sheet metal during deep drawing of hollow bodies. It is about a multiple buckling (deforming) and back buckling (reforming) of a workpiece. During the reforming phase, the

Relativgeschwindigkeit zwischen Stempel und Matrize gegenüber der Geschwindigkeit während der Phase des Deformierens gesteigert. Der Stempel führt während der Phase des Reformierens eine Bewegung entgegen der Phase des Deformierens aus. Die Geschwindigkeiten des Stempels während der genannten Phasen sind ungleich groß.Relative speed between punch and die increased compared to the speed during the deforming phase. The punch performs a movement against the phase of deforming during the reforming phase. The speeds of the punch during these phases are unequal.

US 2008/0098789 A1 beschreibt ein Verfahren und eine Vorrichtung zum Umformen eine Blechplatine mit einer zweistufigen Blechhaltung. US 2008/0098789 A1 describes a method and an apparatus for forming a sheet metal blank with a two-stage sheet metal posture.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung, eine Anlage, ein Verfahren und ein Werkstück derart zu gestalten, dass hochfeste Stähle umformbar sind, ohne dass ein Reißen in den Kantenbereichen auftritt, und dass eine größere Ziehtiefe als bisher erreicht wirdThe invention has for its object to make a device, a system, a method and a workpiece such that high-strength steels are deformable without tearing occurs in the edge regions, and that a greater draw depth than previously achieved

Diese Aufgabe wird mittels der Merkmale der unabhängigen Ansprüche gelöst.This object is achieved by means of the features of the independent claims.

Der Grundgedanke besteht in Folgendem:

  • Es werden in üblicher Weise ein Stempel sowie eine mit diesem zusammenarbeitende Matrize verwendet. Jedoch sind sowohl der Stempel als auch die Matrize zweiteilig. Beide umfassen ein im Wesentlichen zylindrisches Innenteil sowie einen dieses umschließenden Ring.
The basic idea is the following:
  • There are used in the usual way a stamp and a cooperating with this die. However, both the stamp and the die in two parts. Both comprise a substantially cylindrical inner part and a ring enclosing this.

Alle vier genannten Bauteile können zum Zwecke des Umformens in Ziehrichtung verfahrbar sein.All four components mentioned can be moved in the drawing direction for the purpose of forming.

Entscheidend ist, dass wenigstens zwei der am Ziehvorgang beteiligten Teile unterschiedliche Geschwindigkeiten haben, wenigstens während gewisser Phasen des Umformens. Insbesondere kann die innere Matrize eine höhere Geschwindigkeit aufweisen, als die äußere Matrize.It is crucial that at least two of the parts involved in the drawing process have different speeds, at least during certain stages of forming. In particular, the inner die may have a higher speed than the outer die.

Die folgenden Verfahrensweisen sind denkbar:

  1. I. Während einer Anfangsphase bewegen sich beide Matrizen in derselben Richtung mit gleich großer Geschwindigkeit.
  2. II. Während einer mittleren Phase bewegen sich wiederum beide Matrizen in ein und derselben Richtung, die innere Matrize jedoch mit höherer Geschwindigkeit, als die äußere.
  3. III. In einer Endphase steht die innere Matrize still, während die äußere sich mit konstanter Geschwindigkeit weiter bewegt.
The following procedures are conceivable:
  1. I. During an initial phase, both matrices move in the same direction at the same speed.
  2. II. During a middle phase both matrices move in one and the same direction, but the inner matrix moves at a higher speed than the outer one.
  3. III. In a final phase, the inner die stops, while the outer moves at a constant speed.

Weitere Varianten sind die folgenden:

  • Die äußere Matrize bewegt sich von Anfang an mit konstanter Geschwindigkeit. Hingegen ist der Bewegungsverlauf der inneren Matrize gleich einer gesteuerten Bewegungskurve, zum Beispiel Sinuskurve, ausgehend von einer Geschwindigkeit unter jener der äußeren Matrize, dann diese übersteigend, und schließlich wieder abnehmend.
Other variants are the following:
  • The outer die moves at a constant speed from the beginning. On the other hand, the course of movement of the inner matrix is equal to a controlled movement curve, for example sine curve, starting from a speed below that of the outer matrix, then exceeding it, and finally decreasing again.

Die Geschwindigkeitsunterschiede können erheblich sein. So kann die Geschwindigkeit der inneren Matrize das 1,5 - 2, 2,5- oder 3-fache der Geschwindigkeit der äußeren Matrize betragen.The speed differences can be significant. Thus, the speed of the inner die may be 1.5, 2, 2.5, or 3 times the speed of the outer die.

Die Erfindung ist anhand der Zeichnung näher erläutert. Darin ist im Einzelnen Folgendes dargestellt:

Figur 1
zeigt in schematischer Darstellung und im Aufriss eine Ziehvorrichtung mit bereits vorgeformtem Werkstück in einer ersten Umformphase, des gesamten Umformhubes.
Figur 2
zeigt das Werkstück kurz vor Ende der zweiten Umformphase.
Figur 3
zeigt das Werkstück am Ende des Umformvorganges.
Fig. 4 bis 9
veranschaulichen den Umformvorgang in sechs verschiedenen Umformstationen.
The invention is explained in more detail with reference to the drawing. It details the following:
FIG. 1
shows a schematic representation and in elevation a drawing device with already preformed workpiece in a first forming phase, the entire Umformhubes.
FIG. 2
shows the workpiece shortly before the end of the second forming phase.
FIG. 3
shows the workpiece at the end of the forming process.
Fig. 4 to 9
illustrate the forming process in six different forming stations.

Die in Figur 1 dargestellte Ziehvorrichtung umfasst einen Stempel 1 und einen Blechhalter 2. Der Stempel 1 ist von leicht konischer Gestalt. Er weist eine Bodenformfläche 1.1 und eine Wandformfläche 1.2 auf.In the FIG. 1 shown pulling device comprises a punch 1 and a blank holder 2. The punch 1 is of slightly conical shape. It has a bottom mold surface 1.1 and a wall mold surface 1.2.

Stempel 1 ist von einem Blechhalter 2 umgeben. Blechhalter 2 weist eine Stützfläche 2.1 auf. Blechhalter 2 ist ringförmig.Stamp 1 is surrounded by a blank holder 2. Sheet metal holder 2 has a support surface 2.1. Sheet holder 2 is annular.

Über dem Stempel 1 befindet sich eine innere Matrize 3. Diese ist wenigstens annähernd zylindrisch. Sie ist umgeben von einer äußeren Matrize 4. Diese ist ringförmig.Above the punch 1 is an inner die 3. This is at least approximately cylindrical. It is surrounded by an outer die 4. This is ring-shaped.

Die innere Matrize 3 weist wiederum eine Bodenformfläche 3.1 auf. Die äußere Matrize 4 ist ringförmig. Sie weist eine Wandformfläche 4.1, ferner eine Einspannfläche 4.2 zum Festklemmen des Ziehrandes 5.3 eines Werkstückes 5 an der Stützfläche 2.1 des Blechhalters 2 auf. Das Werkstück 5 ist aus einer kreisscheibenförmigen Platine hervorgegangen. Siehe auch Fig. 2. Es umfasst einen Boden 5.1, eine Wand 5.2, sowie den Ziehrand 5.3.The inner die 3 in turn has a bottom mold surface 3.1. The outer die 4 is annular. It has a wall mold surface 4.1, further a clamping surface 4.2 for clamping the drawing edge 5.3 of a workpiece 5 on the support surface 2.1 of the sheet holder 2. The workpiece 5 has emerged from a circular disk-shaped board. See also Fig. 2 , It comprises a bottom 5.1, a wall 5.2, and the drawing edge 5.3.

Die Ziehvorrichtung arbeitet wie folgt: Sie ist zunächst offen, das heißt die Einspannfläche 4.2 der äußeren Matrize 4 befindet sich etwa auf der Höhe der Bodenformfläche 3.1 der inneren Matrize 3. Auf etwa derselben Höhe befindet sich die Stützfläche 2.1 des Blechhalters 2.It is initially open, that is, the clamping surface 4.2 of the outer die 4 is located approximately at the height of the bottom mold surface 3.1 of the inner die 3. At about the same height is the support surface 2.1 of the sheet holder. 2

In dieser Phase wird ein Werkstück 5 in die Ziehvorrichtung eingelegt und zwischen der Stützfläche 2.1 und der Einspannfläche 4.2 eingespannt. Jetzt beginnt die eigentliche Arbeitsphase der Ziehvorrichtung. Dabei bewegen sich die innere Matrize 3 und die äußere Matrize 4 zusammen mit dem vorgeformten Werkstück, sowie auch dem Blechhalter 2 in Pfeilrichtung nach unten. Dabei haben die genannten Teile (innere Matrize 3, äußere Matrize 4, Blechhalter 2 und vorgeformtes Werkstückes) dieselbe Geschwindigkeit.In this phase, a workpiece 5 is inserted into the pulling device and clamped between the support surface 2.1 and the clamping surface 4.2. Now begins the actual work phase of the pulling device. In this case, the inner die 3 and the outer die 4 move together with the preformed workpiece, as well as the sheet holder 2 in the arrow direction down. The parts mentioned (inner die 3, outer die 4, blank holder 2 and preformed workpiece) have the same speed.

Dies ändert sich gemäß der Erfindung in einer nachfolgenden Phase. Dabei überholt die innere Matrize 3 die äußere Matrize 4.This changes according to the invention in a subsequent phase. In this case, the inner die 3 overtakes the outer die 4.

In einer weiteren, nachfolgenden Phase überholt hingegen die äußere Matrize 4 die innere Matrize 3.In a subsequent phase, on the other hand, the outer die 4 overtakes the inner die 3.

Man beachte, dass dies auch umgekehrt sein kann.Note that this may be the other way around.

Die in Figur 1 gezeigte Ziehvorrichtung ist nur eine Station von einer Serie von Ziehstationen. Diese sind hier nicht dargestellt. In der Praxis sind sie in einer Werkshalle in Reihe geschaltet.In the FIG. 1 The drawing apparatus shown is only one station of a series of drawing stations. These are not shown here. In practice, they are connected in series in a workshop.

Dabei braucht nur eine einzige Ziehstation gemäß der Erfindung gestaltet zu sein, das heißt mit Antrieben versehen, die der inneren Matrize 3 einerseits, der äußeren Matrize 4 und dem Blechhalter 2 andererseits unterschiedliche Geschwindigkeiten während des Ziehvorganges verleihen können.It only needs a single drawing station to be designed according to the invention, that is provided with drives that can give the inner die 3 on the one hand, the outer die 4 and the blank holder 2 on the other hand, different speeds during the drawing process.

Wie das Werkstück nach Verlassen der verschiedenen Ziehstationen aussieht, erkennt man aus den Figuren 4 - 9.How the workpiece looks after leaving the various drawing stations can be seen from the FIGS. 4 to 9 ,

Der Ziehrand 5.3 kann nach dem letzten Ziehvorgang von der Wand 5.2 auch abgestanzt werden, je nach Verwendung des fertigen Topfes.
Weitere Möglichkeiten der Realisierung der Erfindung sind die folgenden:

  • Auch Stempel 1 ist auf und ab verfahrbar, und/oder
  • In einer kinematischen Umkehrung bewegen sich Blechhalter 2 und äußere Matrize 4 mit eingespanntem Werkstück einerseits, und Stempel 1 andererseits nach oben. Die mittlere Matrize 3 ist ortsfest.
  • Während des Ziehvorganges bleibt die mittlere Matrize 3 stehen, und/oder es bleiben der Blechhalter 2 und die äußere Matrize 4 stehen.
The drawing edge 5.3 can also be stamped after the last drawing of the wall 5.2, depending on the use of the finished pot.
Further possibilities for realizing the invention are the following:
  • Also stamp 1 is moved up and down, and / or
  • In a kinematic reversal plate holder 2 and outer die 4 move with clamped workpiece on the one hand, and stamp 1 on the other hand upwards. The middle die 3 is stationary.
  • During the drawing process, the middle die 3 stops, and / or it remain the blank holder 2 and the outer die 4 stand.

Die Erfindung ist im Hinblick auf das Herstellen eines topfförmigen Bauteiles beschrieben. Es versteht sich jedoch, dass auch von der Topfform abweichende Hohlkörper damit hergestellt werden können.The invention is described with regard to the production of a pot-shaped component. It is understood, however, that deviating from the cup shape hollow body can be made with it.

Auch können die Matrizen Formen haben, die von den beschriebenen Formen einer Scheibe und eines Ringes abweichen.Also, the dies may have shapes that differ from the shapes of a disk and a ring described.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
Stempelstamp
1.11.1
BodenformflächeFloor molding surface
1.21.2
WandformflächeWall molding surface
22
Blechhalterblankholder
2.12.1
Stützflächesupport surface
3.Third
innere Matrizeinner matrix
3.13.1
BodenformflächeFloor molding surface
44
äußere Matrizeouter die
4.14.1
WandformflächeWall molding surface
4.24.2
Einspannflächechucking
55
Werkstückworkpiece
5.15.1
Bodenground
5.25.2
Wandwall
5.35.3
Ziehranddrawing border

Claims (8)

  1. An apparatus for forming a sheet metal blank into a pot (5), having a bottom (5.1), a wall (5.2) and a drawn edge (5.3), said apparatus comprising the following features or components:
    1.1 a punch (1) with a bottom forming area (1.1) forming the bottom (5.1) and a wall forming area (1.2) forming the wall (5.2);
    1.2 an annular blank holder (2) surrounding the punch (1) and having a supporting surface (2.1) for placing the drawn edge (5.3);
    1.3 an inner die (3) with a bottom forming area (3.1);
    1.4 an outer die (4) with a wall forming area (4.1) and a clamping area (4.2) for gripping the drawn edge (5.3) and for pressing said drawn edge against the supporting surface (2.1) of the blank holder (2);
    characterized by the following features:
    1.5 a drive is respectively associated with at least the inner die (3) and the outer die (4), said drive being formed and designed in such a way that it provides said dies (3, 4) simultaneously with different velocities in one and the same direction after clamping and thus at the beginning of the working phase of the forming of the workpiece area within the clamping region.
  2. An apparatus according to claim 1, characterized by the following features: a drive is respectively associated with the inner die (3) on the one hand and the outer die (4) as well as the blank holder (2) on the other hand, by means of which the inner die (3) overtakes the outer die (4) in a first phase, or vice versa, and in a subsequent phase the outer die (4) overtakes the inner die (3), or vice versa.
  3. An apparatus according to claim 2, characterized in that also the punch (1) is also displaceable by a drive in the drawing direction.
  4. An apparatus according to one of the claims 2 or 3, characterized in that the forming area (4.1) of the punch (1) extends conically in the direction towards the bottom forming area (1.1) of the punch (1).
  5. An apparatus according to one of the claims 2 to 4, characterized in that the wall forming area (4.1) of the outer die (4) tapers in the drawing direction.
  6. An installation for forming a sheet metal blank into a pot (5), having a bottom (5.1), a wall (5.2) and a drawn edge (5.3), comprising a plurality of apparatuses of which at least one comprises the features of one of the claims 1 to 5;
    6.1 the installation comprises a number of drawing stations;
    6.2 at least one of the drawing stations is formed according to one of the claims 1 to 5.
  7. A method of forming a sheet metal blank into a pot (5), comprising the following features or components:
    7.1 a punch (1) with a bottom forming area (1.1) forming the bottom (5.1) and a wall forming area (1.2) forming the wall (5.2);
    7.2 an annular blank holder (2) surrounding the punch (1) and having a supporting surface (2.1) for placing the drawn edge (5.3);
    7.3 an inner die (3) with a bottom forming area (3.1);
    7.4 an outer die (4) with a wall forming area (4.1) and a clamping area (4.2) for gripping the drawn edge (5.3) and for pressing said drawn edge against the supporting surface (2.1) of the blank holder (2);
    characterized by the following features:
    7.5 a sheet metal blank or an intermediate product produced therefrom is placed in the drawing apparatus which is opened;
    7.6 during a first forming phase the inner die (3) and the outer die (4) as well as the blank holder (2) together with the clamped sheet metal blank or with the clamped pre-shaped workpiece are moved in the drawing direction;
    7.7 the dies (3, 4) are moved simultaneously at different velocities in one and the same direction after the clamping and thus at the beginning of the work phase of the forming of the workpiece area within the clamping area, and during a phase of the forming process the inner die (3) overtakes the outer die (4), or vice versa.
  8. A method according to claim 7, characterized by the following features:
    8.1 during an initial phase the two dies (3, 4) move in the same direction at equal velocity;
    8.2 during a middle phase the two dies (3, 4) move in one and the same direction, but the inner die (3) at higher velocity than the outer die (4);
    8.3 in an end phase the inner die (3) stands still, while the outer die (4) continues to move at constant velocity.
EP13711617.4A 2012-03-22 2013-03-18 Device and method for machining a workpiece consisting of metal, particularly for producing a cup-shaped component for the automobile industry Active EP2785477B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20170726A RS56287B1 (en) 2012-03-22 2013-03-18 Device and method for machining a workpiece consisting of metal, particularly for producing a cup-shaped component for the automobile industry

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012005635A DE102012005635B3 (en) 2012-03-22 2012-03-22 Apparatus, system and method for forming a sheet metal blank and a workpiece produced therewith
PCT/EP2013/055553 WO2013139731A1 (en) 2012-03-22 2013-03-18 Device and method for machining a workpiece consisting of metal, particularly for producing a cup-shaped component for the automobile industry, as well as such a workpiece

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EP2785477A1 EP2785477A1 (en) 2014-10-08
EP2785477B1 true EP2785477B1 (en) 2017-05-31

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US (1) US9289812B2 (en)
EP (1) EP2785477B1 (en)
JP (2) JP6654896B2 (en)
KR (1) KR102155519B1 (en)
CN (1) CN104136141B (en)
BR (1) BR112014020730B1 (en)
CA (1) CA2865465C (en)
DE (1) DE102012005635B3 (en)
ES (1) ES2629864T3 (en)
MX (1) MX350758B (en)
PL (1) PL2785477T3 (en)
PT (1) PT2785477T (en)
RS (1) RS56287B1 (en)
RU (1) RU2634830C2 (en)
WO (1) WO2013139731A1 (en)
ZA (1) ZA201407089B (en)

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Publication number Publication date
CN104136141A (en) 2014-11-05
JP2018187681A (en) 2018-11-29
MX350758B (en) 2017-09-18
KR102155519B1 (en) 2020-09-14
RU2014137905A (en) 2016-05-20
MX2014010115A (en) 2015-03-09
ES2629864T3 (en) 2017-08-16
CA2865465C (en) 2020-07-21
JP6727255B2 (en) 2020-07-22
JP2015510842A (en) 2015-04-13
US9289812B2 (en) 2016-03-22
ZA201407089B (en) 2016-08-31
BR112014020730B1 (en) 2021-05-04
DE102012005635B3 (en) 2013-06-27
RU2634830C2 (en) 2017-11-03
PT2785477T (en) 2017-07-10
JP6654896B2 (en) 2020-02-26
KR20140138632A (en) 2014-12-04
US20140352390A1 (en) 2014-12-04
RS56287B1 (en) 2017-12-29
EP2785477A1 (en) 2014-10-08
CN104136141B (en) 2017-11-10
WO2013139731A1 (en) 2013-09-26
CA2865465A1 (en) 2013-09-26
PL2785477T3 (en) 2017-09-29

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