EP2259883B1 - Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device - Google Patents

Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device Download PDF

Info

Publication number
EP2259883B1
EP2259883B1 EP09730365.5A EP09730365A EP2259883B1 EP 2259883 B1 EP2259883 B1 EP 2259883B1 EP 09730365 A EP09730365 A EP 09730365A EP 2259883 B1 EP2259883 B1 EP 2259883B1
Authority
EP
European Patent Office
Prior art keywords
deep
bead
workpiece
punch
drawing die
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
EP09730365.5A
Other languages
German (de)
French (fr)
Other versions
EP2259883A1 (en
Inventor
Thomas Flehmig
Klaus GÖHLER
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 EP2259883A1 publication Critical patent/EP2259883A1/en
Application granted granted Critical
Publication of EP2259883B1 publication Critical patent/EP2259883B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening

Definitions

  • the invention relates to a method for material flow control during deep drawing of a workpiece.
  • the method can be carried out by means of a deep-drawing device with a deep-drawing die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep drawing operation on the guide portion, and with a deep-drawing die, which exerts the force required for deep drawing ,
  • workpieces can be processed whose diameter does not exceed the maximum diameter specified by the respective drawing-off ratio relative to a well-shrinking test.
  • the deep drawing process can then be used only for the production of drawn parts in certain size ranges.
  • the flange portions of the workpiece are comparatively narrow, so that increased care must be taken during the deep drawing operation.
  • the tooling is increased by this approach.
  • the cycle time in production is extended, which reduces the efficiency of the process.
  • Facilitating the flow of material from the flange area into the deep-drawn areas by reducing the flow-inhibiting friction of the workpiece on the deep-drawing die and / or hold-down by the use of lubricants can indeed assist, but not fully guarantee, correct process control.
  • additional cleaning measures on the drawn part and the thermoforming tools are required.
  • the flow direction of the material during the Deep drawing process be braked by appropriately arranged Bremswülste over a certain section. As a result, the material of the workpiece can be stretched even before the actual deep-drawing process.
  • a material flow control is made in the deep drawing of sheets by embossing a Z-shaped shut-off in the sheet edge, which inhibits the flow of material.
  • the shut-off stage is reduced again so that the flow of material from the flange area into the die is facilitated.
  • an additional deflection of the material and correspondingly expensive tools which must exert high additional forces required for this procedure.
  • the friction is increased by the deflection.
  • the present invention is therefore based on the object to provide a method by which or with which the Pulling capacity of a workpiece better utilized and better dimensional accuracy, in particular the bottom of the drawn part can be achieved.
  • the object is achieved by a method for material flow control during deep drawing of a workpiece, wherein the Deep drawing operation is performed incrementally, and in which at least one bead is incorporated in the flange portion of the workpiece before each Tiefziehvorgangsinkrement.
  • the dimensional accuracy of the drawn part can be improved. Because by the incorporation of the bead, a pre-stretching of the bottom regions is first achieved, which favors the interaction of the deep-drawing die with the bottom region taking place in the course of the deep-drawing process increment following the incorporation of the bead. In addition, more material from the flange portion of the workpiece can flow into the frame as it approaches the frame. As a result, the risk of material fracture, for example in the region of the frame or the floor, which may be caused in particular by a material accumulation, reduced. Thus, it is possible to achieve a drawing depth with predetermined workpieces, which in particular goes up to a factor of 2.5 beyond the drawing depth predetermined by the known drawing-off ratio.
  • the bead is incorporated only in the region to be formed corners of the workpiece.
  • the inventive method can be implemented more efficiently. Because in principle, the risk of material jams occurs only in more curved areas such as corners reinforced. In contrast, in largely rectilinear areas of a drawn part, for example on the long side of a rectangular box, the flow behavior of the material may be sufficient, even without the additional provision of a bead, in order to achieve a satisfactory deep drawing result. On In this way, in particular the tool and process costs can be reduced.
  • the bead is incorporated with rounded contours.
  • the inventive method for use on workpieces made of sensitive materials can be made suitable. Because the roundness of the contours gently modifies the flow behavior of the material. Material impairments due to sharp-angled contours are thus avoided.
  • the bead is incorporated with parallel to the deep drawing and / or inclined walls.
  • the pre-stretching effected by the incorporation of the bead is advantageously carried out essentially in the deep-drawing direction.
  • the process control of the deep drawing process increment following the incorporation of the bead can be improved.
  • the method according to the invention can be carried out with a deep-drawing device, which is particularly suitable for carrying out a method as described above Method is suitable, with a deep-drawing die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep-drawing operation on the guide portion, and with a deep-drawing die, which exerts the force required for deep drawing, performed a is independently operable bead stamp is provided, whose contour is adapted to the contour of the guide portion.
  • the beads can be worked into the flange area of the workpiece without having to use a drive coupled to the deep-drawing punch, to the deep-drawing die and / or to the blank holder.
  • the operation of the bead punch can be very flexibly tuned to the operation of the other components of the device. This facilitates in particular the process control of the deep-drawing process.
  • the punch of the thermoforming device has two or more projections.
  • two or more depressions are then arranged opposite the projections, into which the projections can be inserted upon actuation of the bead punch. In this way, more than one bead can be incorporated into the material in the flange region of the workpiece with simple means.
  • Fig. 1a shows a portion of a thermoforming device 2 in a schematic cross-sectional view.
  • the deep-drawing device 2 comprises a deep-drawing die 4, a deep-drawing die 6, whose shaped portion 8 is adapted to the deep-drawing die 4, a hold-down 10 and an independently operable bead punch 12.
  • the bead punch 12 has two projections 16 on its side facing the guide portion 14 of the deep-drawing die 6 which can be inserted into two recesses 18 arranged on the guide section 14.
  • both recesses 18 and both projections 16 each have the same contour.
  • the contours can be designed differently with each other when several recesses 18 and projections 16, if appropriate. It is of course also possible to provide only a single recess 18, to which the bead punch 12 is then adapted accordingly.
  • the single hold-down 10 is arranged in this example on the side facing away from the deep-drawing die 4 side of the bead punch 12. However, it is also conceivable to provide a plurality of hold-downs 10, one being arranged, for example, between deep-drawing punches 4 and bead punches 12. If several separate bead punches 12 are to be present, downholders 10 can also be arranged between the bead punches 12.
  • the depressions 18 in the guide section 14 of the deep-drawing die 6 have a wall surface which slopes in an inclined manner relative to the deep-drawing direction and which is in this example is arranged on the side of the recess 18 further spaced from the deep-drawing die 4, whereas the wall surfaces arranged on the side of the depression 18 closer to the deep-drawing die 4 extend substantially parallel to the deep-drawing direction. In principle, however, another contour is conceivable.
  • a workpiece 20 for example a steel blank in the deep-drawing device 2
  • a workpiece 20 is arranged between the guide section 14 of the deep-drawing die 6 on one side and the punch 12 and the blank holder 10 on the other side.
  • the Sickenstempel 12 is in a raised position, whereas the hold-10 is already applied to the workpiece 20 under slight pressure.
  • the deep-drawing die 4 is located in such a position over the deep-drawing die 6 that it is preferably in light contact with the workpiece 20.
  • Fig. 1b now shows in a first step, as the beads 22 are incorporated into the flange portion of the workpiece 20.
  • the bead punch 12 is lowered onto the guide section 14 independently of the other components 4, 6, 10.
  • two beads 22 are incorporated into the workpiece 20.
  • an advantageous pre-stretching of the workpiece 20 is effected, because the material flows to the beads 22 on the one hand from the outer part of the flange portion on the other hand from the arranged between deep-drawing die 4 and deep-drawing die 6 portion of the workpiece 20, which is at least partially used for the formation of the soil, to.
  • the material is prepared by incorporating the beads 22 for the following deep drawing operation increment.
  • a possible change in the thickness of the workpiece 20 is not shown for the sake of clarity.
  • the bead punch 12 is again brought into the raised position, so that it is preferably no longer in the plane of the workpiece 20.
  • Fig. 1c shows the first thermoforming increment.
  • the deep-drawing die 4 is moved by a certain distance in the direction of the mold section 8 of the deep-drawing die 6.
  • the workpiece 20 is detected by the deep-drawing die 4 and drawn into the mold section 8 by the appropriate distance.
  • the distance is just dimensioned such that the material used to form the bead 22, which is closer to the deep-drawing die 4, is completely expended for the deep-drawing operation increment.
  • the said bead 22 is largely reshaped from the workpiece 20.
  • the material can flow well both in largely rectilinear and in more curved areas, for example at corners.
  • One Material accumulation in the flange area is thus substantially avoided.
  • Fig. 1d shows how once again the punch 12 is actuated independently of the other components 4, 6, 10 of the thermoforming device 2 and the beads 22 are worked into the remaining flange region of the workpiece 20.
  • the material is fed to the beads 22 substantially from the outer part of the flange.
  • the punch 12 is returned to the raised position.
  • Fig. 1e shows the next deep drawing increment.
  • the thermoforming punch 4 is moved further toward the mold section 8.
  • the deep drawing die 4 closer bead 22 is again almost formed out.
  • the thermoforming punch 4 remains in the position shown.
  • Fig. 1f shows the next operation of the bead punch 12.
  • the flange area has become so narrow by the deep drawing process that only one bead 22 can be incorporated.
  • Fig. 1g shows the last thermoforming increment.
  • the thermoforming punch 4 is moved in this example to the stop on the mold section 8 of the deep drawing die 6.
  • the workpiece 20 is thereby almost completely pulled out of the area between the guide section 14 and the punch 12.
  • the thermoforming process is over.
  • the thermoforming punch 4 can now be raised to remove the finished drawn part of the deep-drawing die 6.

Landscapes

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

Description

Die Erfindung betrifft ein Verfahren zur Materialflusssteuerung beim Tiefziehen eines Werkstücks. Das Verfahren kann mittels einer Tiefziehvorrichtung mit einem Tiefziehgesenk, welches einen Führungsabschnitt und einen Formabschnitt aufweist, mit einem Niederhalter, welches die Positionierung des Werkstücks während des Tiefziehvorgangs auf dem Führungsabschnitt unterstützt, und mit einem Tiefziehstempel, welcher die zum Tiefziehen erforderliche Kraft ausübt, durchgeführt werden.The invention relates to a method for material flow control during deep drawing of a workpiece. The method can be carried out by means of a deep-drawing device with a deep-drawing die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep drawing operation on the guide portion, and with a deep-drawing die, which exerts the force required for deep drawing ,

Verfahren der eingangs genannten Art sind bereits bekannt. Problematisch bei diesen Verfahren ist, dass sich während des Tiefziehvorgangs in den Flanschbereichen des Werkstücks ein Materialstau ausbilden kann. Dies führt gegebenenfalls dazu, dass der Materialfluss aus dem Flanschbereich des Werkstücks verringert oder sogar unterbunden wird, so dass das Material aus den bereits tiefgezogenen Bereichen, beispielsweise der Zarge oder dem Boden, bei fortgesetztem Tiefziehvorgang ausdünnt und somit die Gefahr eines Risses in diesen Bereichen gegeben ist. Dies ist insbesondere dann der Fall, wenn die Ziehtiefe sehr groß ist oder wenn das Werkstück zu einem Ziehteil mit stärker gekrümmten Bereichen wie beispielsweise Ecken tiefgezogen werden soll.Methods of the type mentioned are already known. The problem with these methods is that during the deep-drawing process in the flange portions of the workpiece, a material accumulation can form. This possibly leads to the fact that the flow of material from the flange portion of the workpiece is reduced or even prevented, so that the material from the already deep-drawn areas, such as the frame or the floor, thins with continued deep drawing operation and thus the risk of a crack in these areas is. This is particularly the case when the drawing depth is very large or when the workpiece is to be deep drawn to a drawn part with more curved areas such as corners.

Andererseits kann durch ein während des Tiefziehvorgangs auftretendes Abschnüren des Bodenbereichs des Ziehteils von der Zarge die Formgenauigkeit des Bodens beeinträchtigt werden. Denn bei der Ausbildung der Bodenstrukturen sind in diesem Fall kaum Bereiche vorgestreckten Materials vorhanden. Dies kann sich insbesondere dann nachteilig auswirken, wenn die Bodenfläche deutlich kleiner als die Zargenfläche ist.On the other hand, can be impaired by a occurring during the deep drawing process constriction of the bottom portion of the drawn part of the frame, the dimensional accuracy of the soil. Because in the training of soil structures are in In this case there are hardly any areas of pre-stretched material. This can have a disadvantageous effect, in particular, when the bottom surface is significantly smaller than the frame surface.

Um Reisser zu vermeiden, können Werkstücke verweridet werden, deren Durchmesser den durch das jeweilige Grenzziehverhältnis bezogen auf ein Näpfchen-Tiefziehversuch vorgegebenen maximalen Durchmesser nicht überschreiten. Allerdings kann das Tiefziehverfahren dann nur zur Herstellung von Ziehteilen in bestimmten Größenbereichen eingesetzt werden. Darüber hinaus sind die Flanschbereiche des Werkstücks vergleichsweise schmal, so dass während des Tiefziehvorgangs eine erhöhte Sorgfalt aufzuwenden ist. Zur Bruchvermeidung ist es ferner möglich, den Tiefziehvorgang in mehreren Schritten durchzuführen, während derer der Querschnitt des Tiefziehstempels sukzessive verringert wird. Auf diese Weise kann die durch das Grenzziehverhältnis vorgegebene Bedingung auch bei der Verwendung von Werkstücken mit großen Durchmessern länger eingehalten werden. Allerdings wird durch diese Vorgehensweise der Werkzeugaufwand erhöht. Weiterhin verlängert sich die Taktzeit bei der Fertigung, wodurch die Effizienz des Verfahrens gemindert wird. Das Nachfließen des Materials aus dem Flanschbereich in die tiefgezogenen Bereiche zu erleichtern, indem die den Fließvorgang grundsätzlich hemmende Reibung des Werkstücks an dem Tiefziehgesenk und/oder Niederhalter durch den Einsatz von Schmiermitteln verringert wird, kann eine korrekte Prozessführung zwar unterstützen, jedoch nicht vollständig gewährleisten. Darüber hinaus sind beim Einsatz von Schmiermitteln zusätzliche Reinigungsmaßnahmen an dem Ziehteil und an den Tiefziehwerkzeugen erforderlich. Im Flanschbereich des Werkstücks kann die Fließrichtung des Materials während des Tiefziehvorgangs durch entsprechend angeordnete Bremswülste über einen bestimmten Abschnitt gebremst werden. Dadurch kann das Material des Werkstücks schon vor dem eigentlichen Tiefziehvorgang abgestreckt werden. Allerdings wird durch diese Vorgehensweise lediglich die Gleichmäßigkeit einer Abstreckung des Materials erreicht. Die Vergrößerung des Einlaufradius des Werkstücks von dem Führungsabschnitt in den Formabschnitt des Tiefziehgesenks ist ebenfalls nicht gegeben. Dies kann zu unerwünschter Faltenbildung an dem Ziehteil führen.In order to avoid reisser, workpieces can be processed whose diameter does not exceed the maximum diameter specified by the respective drawing-off ratio relative to a well-shrinking test. However, the deep drawing process can then be used only for the production of drawn parts in certain size ranges. In addition, the flange portions of the workpiece are comparatively narrow, so that increased care must be taken during the deep drawing operation. In order to prevent breakage, it is also possible to carry out the deep drawing operation in several steps, during which the cross section of the deep-drawing die is successively reduced. In this way, the predetermined by the Grenzziehverhältnis condition can be maintained longer even when using workpieces with large diameters. However, the tooling is increased by this approach. Furthermore, the cycle time in production is extended, which reduces the efficiency of the process. Facilitating the flow of material from the flange area into the deep-drawn areas by reducing the flow-inhibiting friction of the workpiece on the deep-drawing die and / or hold-down by the use of lubricants can indeed assist, but not fully guarantee, correct process control. In addition, when using lubricants additional cleaning measures on the drawn part and the thermoforming tools are required. In the flange area of the workpiece, the flow direction of the material during the Deep drawing process be braked by appropriately arranged Bremswülste over a certain section. As a result, the material of the workpiece can be stretched even before the actual deep-drawing process. However, this procedure only achieves the uniformity of ironing of the material. The enlargement of the run-in radius of the workpiece from the guide portion into the mold portion of the deep-drawing die is also not given. This can lead to undesirable wrinkling on the drawn part.

Gemäß der Patentschrift EP 1 526 931 B1 wird eine Materialflusssteuerung beim Tiefziehen von Blechen durch das Prägen einer Z-förmigen Absperrstufe in den Blechrand vorgenommen, welche den Materialfluss hemmt. Im Laufe des Tiefziehvorgangs wird die Absperrstufe wieder reduziert, so dass der Materialfluss vom Flanschbereich in das Gesenk hinein erleichtert wird. Allerdings sind für diese Vorgehensweise eine zusätzliche Umlenkung des Materials und dementsprechend aufwändige Werkzeuge, welche hohe Zusatzkräfte ausüben müssen, erforderlich. Darüber hinaus wird durch die Umlenkung die Reibung erhöht.According to the patent EP 1 526 931 B1 a material flow control is made in the deep drawing of sheets by embossing a Z-shaped shut-off in the sheet edge, which inhibits the flow of material. During the deep-drawing process, the shut-off stage is reduced again so that the flow of material from the flange area into the die is facilitated. However, an additional deflection of the material and correspondingly expensive tools, which must exert high additional forces required for this procedure. In addition, the friction is increased by the deflection.

Aus der Druckschrift JP-A-01027726 ist darüber hinaus ein Verfahren zum Tiefziehen bekannt, bei dem eine gute Formbarkeit erreicht und eine Rückfederung bei Pressvorgängen vermieden wird, indem während des kontinuierlichen Absenken des Gesenks eine erste und anschließend eine zweite Sicke im Flanschbereich gebildet wird.From the publication JP-A-01027726 In addition, a deep drawing method is known in which good formability is achieved and springback in pressing operations is avoided by forming a first and then a second bead in the flange region during the continuous lowering of the die.

Der vorliegenden Erfindung liegt daher die Aufgabe zu Grunde, ein Verfahren anzugeben, mit welchem bzw. mit welcher das Ziehvermögen eines Werkstücks besser ausgenutzt und eine bessere Formgenauigkeit, insbesondere des Bodens des Ziehteils erreicht werden kann.The present invention is therefore based on the object to provide a method by which or with which the Pulling capacity of a workpiece better utilized and better dimensional accuracy, in particular the bottom of the drawn part can be achieved.

Gemäß einer ersten Lehre der vorliegenden Erfindung wird die Aufgabe durch ein Verfahren zur Materialflusssteuerung beim Tiefziehen eines Werkstücks gelöst, bei dem der Tiefziehvorgang inkrementell vorgenommen wird, und bei dem vor jedem Tiefziehvorgangsinkrement mindestens eine Sicke in den Flanschbereich des Werkstücks eingearbeitet wird.According to a first teaching of the present invention, the object is achieved by a method for material flow control during deep drawing of a workpiece, wherein the Deep drawing operation is performed incrementally, and in which at least one bead is incorporated in the flange portion of the workpiece before each Tiefziehvorgangsinkrement.

Durch diese Vorgehensweise kann die Formgenauigkeit des Ziehteils verbessert werden. Denn durch das Einarbeiten der Sicke wird zunächst eine Vorstreckung der Bodenbereiche erreicht, welche die im Zuge des auf das Einarbeiten der Sicke folgenden Tiefziehvorgangsinkrements erfolgende Wechselwirkung des Tiefziehstempels mit dem Bodenbereich begünstigt. Darüber hinaus kann mehr Material aus dem Flanschbereich des Werkstücks durch die Heranführung an die Zarge in die Zarge nachfließen. Dadurch wird die Gefahr eines Materialbruchs, beispielsweise im Bereich der Zarge oder des Bodens, welcher insbesondere durch einen Materialstau verursacht werden kann, verringert. Somit ist es möglich, mit vorgegebenen Werkstücken eine Ziehtiefe zu erreichen, welche insbesondere bis um den Faktor 2,5 über die durch das bekannte Grenzziehverhältnis vorgegebene Ziehtiefe hinausgeht.By doing so, the dimensional accuracy of the drawn part can be improved. Because by the incorporation of the bead, a pre-stretching of the bottom regions is first achieved, which favors the interaction of the deep-drawing die with the bottom region taking place in the course of the deep-drawing process increment following the incorporation of the bead. In addition, more material from the flange portion of the workpiece can flow into the frame as it approaches the frame. As a result, the risk of material fracture, for example in the region of the frame or the floor, which may be caused in particular by a material accumulation, reduced. Thus, it is possible to achieve a drawing depth with predetermined workpieces, which in particular goes up to a factor of 2.5 beyond the drawing depth predetermined by the known drawing-off ratio.

In einer bevorzugten Ausgestaltung des Verfahrens wird die Sicke lediglich im Bereich zu formender Ecken des Werkstücks eingearbeitet. Auf diese Weise kann das erfindungsgemäße Verfahren effizienter umgesetzt werden. Denn grundsätzlich tritt die Gefahr eines Materialstaus lediglich in stärker gekrümmten Bereichen wie beispielsweise Ecken verstärkt auf. In weitgehend geradlinig verlaufenden Bereichen eines Ziehteils hingegen, beispielsweise an der langen Seite eines rechteckigen Kastens, kann das Fließverhalten des Materials auch ohne das zusätzliche Vorsehen einer Sicke ausreichend sein, um ein befriedigendes Tiefziehergebnis zu erzielen. Auf diese Weise kann insbesondere der Werkzeug- und Prozessaufwand verringert werden.In a preferred embodiment of the method, the bead is incorporated only in the region to be formed corners of the workpiece. In this way, the inventive method can be implemented more efficiently. Because in principle, the risk of material jams occurs only in more curved areas such as corners reinforced. In contrast, in largely rectilinear areas of a drawn part, for example on the long side of a rectangular box, the flow behavior of the material may be sufficient, even without the additional provision of a bead, in order to achieve a satisfactory deep drawing result. On In this way, in particular the tool and process costs can be reduced.

Weiterhin kann durch das auf die Einarbeitung der Sicke folgende Tiefziehvorgangsinkrement die Sicke teilweise oder vollständig wieder herausgeformt werden. Auf diese Weise werden das Tiefziehvorgangsinkrement und das Einarbeiten der Sicke optimal aufeinander abgestimmt. Dadurch wird sichergestellt, dass jeder Materialabschnitt wenigstens einmal einer durch das Einarbeiten der Sicke bewirkten Vorstreckung unterzogen wird.Furthermore, can be partially or completely reshaped by the following on the incorporation of the bead Tiefziehvorgangsinkrement the bead. In this way, the Tiefziehvorgangsinkrement and the incorporation of the bead are optimally matched. This ensures that each material section is subjected at least once to a pre-stretching effected by the incorporation of the bead.

In einer weiteren bevorzugten Ausgestaltung des Verfahrens wird die Sicke mit abgerundeten Konturen eingearbeitet. Auf diese Weise kann das erfindungsgemäße Verfahren für die Anwendung auf Werkstücke aus empfindlichen Materialien tauglich gemacht werden. Denn durch die Abrundung der Konturen wird das Fließverhalten des Materials schonend modifiziert. Materialbeeinträchtigungen durch scharfwinklige Konturen werden somit vermieden.In a further preferred embodiment of the method, the bead is incorporated with rounded contours. In this way, the inventive method for use on workpieces made of sensitive materials can be made suitable. Because the roundness of the contours gently modifies the flow behavior of the material. Material impairments due to sharp-angled contours are thus avoided.

Vorzugsweise wird die Sicke mit zur Tiefziehrichtung parallel und/oder geneigt verlaufenden Wänden eingearbeitet. Dadurch wird die durch das Einarbeiten der Sicke bewirkte Vorstreckung vorteilhaft im Wesentlichen in die Tiefziehrichtung vorgenommen. Dadurch lässt sich die Prozessführung des auf das Einarbeiten der Sicke folgenden Tiefziehvorgangsinkrements verbessern.Preferably, the bead is incorporated with parallel to the deep drawing and / or inclined walls. As a result, the pre-stretching effected by the incorporation of the bead is advantageously carried out essentially in the deep-drawing direction. As a result, the process control of the deep drawing process increment following the incorporation of the bead can be improved.

Das erfindungsgemäße Verfahren kann mit einer Tiefziehvorrichtung, welche insbesondere zur Ausführung eines wie zuvor beschriebenen Verfahrens geeignet ist, mit einem Tiefziehgesenk, welches einen Führungsabschnitt und einen Formabschnitt aufweist, mit einem Niederhalter, welches die Positionierung des Werkstücks während des Tiefziehvorgangs auf dem Führungsabschnitt unterstützt, und mit einem Tiefziehstempel, welcher die zum Tiefziehen erforderliche Kraft ausübt, durchgeführt, wobei ein unabhängig betreibbarer Sickenstempel vorgesehen ist, dessen Kontur an die Kontur des Führungsabschnitts angepasst ist.The method according to the invention can be carried out with a deep-drawing device, which is particularly suitable for carrying out a method as described above Method is suitable, with a deep-drawing die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep-drawing operation on the guide portion, and with a deep-drawing die, which exerts the force required for deep drawing, performed a is independently operable bead stamp is provided, whose contour is adapted to the contour of the guide portion.

Mittels des unabhängig betreibbaren Sickenstempels können die Sicken in den Flanschbereich des Werkstücks eingearbeitet werden, ohne dass ein an den Tiefziehstempel, an das Tiefziehgesenk und/oder an den Niederhalter gekoppelten Antrieb zum Einsatz kommen muss. Auf diese Weise lässt sich der Betrieb des Sickenstempels sehr flexibel auf den Betrieb der anderen Komponenten der Vorrichtung abstimmen. Dies erleichtert insbesondere die Prozessführung des Tiefziehvorgangs.By means of the independently operable bead punch, the beads can be worked into the flange area of the workpiece without having to use a drive coupled to the deep-drawing punch, to the deep-drawing die and / or to the blank holder. In this way, the operation of the bead punch can be very flexibly tuned to the operation of the other components of the device. This facilitates in particular the process control of the deep-drawing process.

Bevorzugtweist der Sickenstempel der Tiefziehvorrichtung zwei oder mehrere Vorsprünge auf. In dem Führungsabschnitt des Tiefziehgesenks sind den Vorsprüngen gegenüber dann zwei oder mehrere Vertiefungen angeordnet, in welche die Vorsprünge bei Betätigung des Sickenstempels einführbar sind. Auf diese Weise kann mit einfachen Mitteln mehr als eine Sicke in das Material im Flanschbereich des Werkstücks eingearbeitet werden.Preferably, the punch of the thermoforming device has two or more projections. In the guide section of the deep drawing die, two or more depressions are then arranged opposite the projections, into which the projections can be inserted upon actuation of the bead punch. In this way, more than one bead can be incorporated into the material in the flange region of the workpiece with simple means.

Es gibt nun vielfältige Möglichkeiten, das erfindungsgemäße Verfahren auszugestalten und weiterzubilden. Im Folgenden wird die Erfindung an Hand eines in einer Zeichnung dargestellten Ausführungsbeispiels näher erläutert. In der Zeichnung zeigen:

Fig. 1a-g
ein Ausführungsbeispiel des erfindungsgemäßen Verfahrens an einer schematisch abgebildeten, Vorrichtung in einer Querschnittsansicht.
There are now many possibilities for designing and developing the method according to the invention. In the following the invention will be explained in more detail with reference to an embodiment shown in a drawing. In the drawing show:
Fig. 1a-g
An embodiment of the method according to the invention to a schematically illustrated, device in a cross-sectional view.

Fig. 1a zeigt einen Abschnitt einer Tiefziehvorrichtung 2 in einer schematischen Querschnittsdarstellung. Die Tiefziehvorrichtung 2 umfasst einen Tiefziehstempel 4, ein Tiefziehgesenk 6, dessen Formabschnitt 8 an den Tiefziehstempel 4 angepasst ist, ein Niederhalter 10 und einen unabhängig betreibbaren Sickenstempel 12. Der Sickenstempel 12 weist an seiner dem Führungsabschnitt 14 des Tiefziehgesenks 6 zugewandten Seite zwei Vorsprünge 16 auf, welche in zwei an dem Führungsabschnitt 14 angeordnete Vertiefungen 18 eingeführt werden können. In diesem Beispiel weisen sowohl beide Vertiefungen 18 als auch beide Vorsprünge 16 jeweils die gleiche Kontur auf. Allerdings können die Konturen bei mehreren Vertiefungen 18 bzw. Vorsprüngen 16 auch untereinander unterschiedlich gestaltet werden, wenn es zweckmäßig ist. Es ist natürlich auch möglich, lediglich eine einzelne Vertiefung 18 vorzusehen, an welche der Sickenstempel 12 dann entsprechend angepasst ist. Fig. 1a shows a portion of a thermoforming device 2 in a schematic cross-sectional view. The deep-drawing device 2 comprises a deep-drawing die 4, a deep-drawing die 6, whose shaped portion 8 is adapted to the deep-drawing die 4, a hold-down 10 and an independently operable bead punch 12. The bead punch 12 has two projections 16 on its side facing the guide portion 14 of the deep-drawing die 6 which can be inserted into two recesses 18 arranged on the guide section 14. In this example, both recesses 18 and both projections 16 each have the same contour. However, the contours can be designed differently with each other when several recesses 18 and projections 16, if appropriate. It is of course also possible to provide only a single recess 18, to which the bead punch 12 is then adapted accordingly.

Der einzige Niederhalter 10 ist in diesem Beispiel auf der von dem Tiefziehstempel 4 abgewandten Seite des Sickenstempels 12 angeordnet. Es ist aber auch denkbar, mehrere Niederhalter 10 vorzusehen, wobei eines beispielsweise zwischen Tiefziehstempel 4 und Sickenstempel 12 angeordnet wird. Sollen mehrere separate Sickenstempel 12 vorhanden sein, können Niederhalter 10 auch zwischen den Sickenstempeln 12 angeordnet sein. Die Vertiefungen 18 in dem Führungsabschnitt 14 des Tiefziehgesenks 6 weisen eine gegen die Tiefziehrichtung geneigt verlaufende Wandfläche auf, welche in diesem Beispiel auf der von dem Tiefziehstempel 4 weiter beabstandeten Seite der Vertiefung 18 angeordnet ist, wohingegen die auf der dem Tiefziehstempel 4 näheren Seite der Vertiefung 18 angeordneten Wandflächen zur Tiefziehrichtung im Wesentlichen parallel verlaufen. Grundsätzlich ist aber auch eine andere Kontur denkbar.The single hold-down 10 is arranged in this example on the side facing away from the deep-drawing die 4 side of the bead punch 12. However, it is also conceivable to provide a plurality of hold-downs 10, one being arranged, for example, between deep-drawing punches 4 and bead punches 12. If several separate bead punches 12 are to be present, downholders 10 can also be arranged between the bead punches 12. The depressions 18 in the guide section 14 of the deep-drawing die 6 have a wall surface which slopes in an inclined manner relative to the deep-drawing direction and which is in this example is arranged on the side of the recess 18 further spaced from the deep-drawing die 4, whereas the wall surfaces arranged on the side of the depression 18 closer to the deep-drawing die 4 extend substantially parallel to the deep-drawing direction. In principle, however, another contour is conceivable.

In der in Fig. 1a gezeigten Position ist ein Werkstück 20, beispielsweise eine Stahlronde in der Tiefziehvorrichtung 2 zwischen dem Führungsabschnitt 14 des Tiefziehgesenks 6 auf der einen Seite und dem Sickenstempel 12 sowie dem Niederhalter 10 auf der anderen Seite angeordnet. Der Sickenstempel 12 befindet sich dabei in einer gehobenen Position, wohingegen der Niederhalter 10 bereits auf dem Werkstück 20 unter leichtem Druck anliegt. Der Tiefziehstempel 4 befindet sich in einer solchen Position über dem Tiefziehgesenk 6, dass er vorzugsweise in leichtem Kontakt mit dem Werkstück 20 steht.In the in Fig. 1a In the position shown, a workpiece 20, for example a steel blank in the deep-drawing device 2, is arranged between the guide section 14 of the deep-drawing die 6 on one side and the punch 12 and the blank holder 10 on the other side. The Sickenstempel 12 is in a raised position, whereas the hold-10 is already applied to the workpiece 20 under slight pressure. The deep-drawing die 4 is located in such a position over the deep-drawing die 6 that it is preferably in light contact with the workpiece 20.

Fig. 1b zeigt nun in einem ersten Schritt, wie die Sicken 22 in den Flanschbereich des Werkstücks 20 eingearbeitet werden. Der Sickenstempel 12 wird unabhängig von den anderen Komponenten 4, 6, 10 auf den Führungsabschnitt 14 herabgefahren. Durch das Einführen der Vorsprünge 16 in die an dem Führungsabschnitt 14 angeordneten Vertiefungen 18 werden zwei Sicken 22 in das Werkstück 20 eingearbeitet. Dadurch wird eine vorteilhafte Vorstreckung des Werkstücks 20 bewirkt, denn das Material fließt den Sicken 22 einerseits aus dem äußeren Teil des Flanschbereichs andererseits aus dem zwischen Tiefziehstempel 4 und Tiefziehgesenk 6 angeordneten Bereich des Werkstücks 20, welcher zumindest teilweise für die Ausbildung des Bodens verwendet wird, zu. Ferner wird das Material durch das Einarbeiten der Sicken 22 für das folgende Tiefziehvorgangsinkrement vorbereitet. In dieser einfach gehaltenen schematischen Darstellung und im Folgenden wird eine etwaige Dickenänderung des Werkstücks 20 der Übersichtlichkeit halber nicht abgebildet. Fig. 1b now shows in a first step, as the beads 22 are incorporated into the flange portion of the workpiece 20. The bead punch 12 is lowered onto the guide section 14 independently of the other components 4, 6, 10. By inserting the projections 16 in the on the guide portion 14 arranged recesses 18 two beads 22 are incorporated into the workpiece 20. As a result, an advantageous pre-stretching of the workpiece 20 is effected, because the material flows to the beads 22 on the one hand from the outer part of the flange portion on the other hand from the arranged between deep-drawing die 4 and deep-drawing die 6 portion of the workpiece 20, which is at least partially used for the formation of the soil, to. Further, the material is prepared by incorporating the beads 22 for the following deep drawing operation increment. In this simple schematic representation and in the following, a possible change in the thickness of the workpiece 20 is not shown for the sake of clarity.

Nach dem Einarbeiten der Sicken 22 wird der Sickenstempel 12 wieder in die gehobene Position gebracht, so dass er sich vorzugsweise nicht mehr in der Ebene des Werkstücks 20 befindet.After incorporation of the beads 22, the bead punch 12 is again brought into the raised position, so that it is preferably no longer in the plane of the workpiece 20.

Fig. 1c zeigt das erste Tiefziehvorgangsinkrement. Der Tiefziehstempel 4 wird um eine bestimmte Distanz in Richtung auf den Formabschnitt 8 des Tiefziehgesenks 6 zu bewegt. Dabei wird das Werkstück 20 von dem Tiefziehstempel 4 erfasst und um die entsprechende Distanz in den Formabschnitt 8 hineingezogen. In diesem Beispiel ist die Distanz gerade so bemessen, dass das zur Bildung der dem Tiefziehstempel 4 näheren Sicke 22 aufgewendete Material vollständig für das Tiefziehvorgangsinkrement aufgewendet wird. Im Ergebnis wird die besagte Sicke 22 aus dem Werkstück 20 weitgehend wieder herausgeformt. Auf diese Weise kann das Material sowohl in weitgehend geradlinigen als auch in stärker gekrümmten Bereichen, beispielsweise an Ecken, gut nachfließen. Ein Materialstau im Flanschbereich wird so im Wesentlichen vermieden. Nach der Bewegung verharrt der Tiefziehstempel 4 in der in Fig. 1c gezeigten Position. Fig. 1c shows the first thermoforming increment. The deep-drawing die 4 is moved by a certain distance in the direction of the mold section 8 of the deep-drawing die 6. In this case, the workpiece 20 is detected by the deep-drawing die 4 and drawn into the mold section 8 by the appropriate distance. In this example, the distance is just dimensioned such that the material used to form the bead 22, which is closer to the deep-drawing die 4, is completely expended for the deep-drawing operation increment. As a result, the said bead 22 is largely reshaped from the workpiece 20. In this way, the material can flow well both in largely rectilinear and in more curved areas, for example at corners. One Material accumulation in the flange area is thus substantially avoided. After the movement remains the thermoforming stamp 4 in the in Fig. 1c shown position.

Fig. 1d zeigt, wie ein weiteres Mal der Sickenstempel 12 unabhängig von den anderen Komponenten 4, 6, 10 der Tiefziehvorrichtung 2 betätigt wird und die Sicken 22 in den verbleibenden Flanschbereich des Werkstücks 20 eingearbeitet werden. Dabei wird das Material den Sicken 22 im Wesentlichen aus dem äußeren Teil des Flansches zugeführt. Nach der Betätigung wird der Sickenstempel 12 wieder in die gehobene Position gebracht. Fig. 1d shows how once again the punch 12 is actuated independently of the other components 4, 6, 10 of the thermoforming device 2 and the beads 22 are worked into the remaining flange region of the workpiece 20. The material is fed to the beads 22 substantially from the outer part of the flange. After actuation, the punch 12 is returned to the raised position.

Fig. 1e zeigt das nächste Tiefziehvorgangsinkrement. Der Tiefziehstempel 4 wird weiter in Richtung auf den Formabschnitt 8 zu gefahren. Die dem Tiefziehstempel 4 nähere Sicke 22 wird dabei wieder nahezu herausgeformt. Der Tiefziehstempel 4 verharrt in der gezeigten Position. Fig. 1e shows the next deep drawing increment. The thermoforming punch 4 is moved further toward the mold section 8. The deep drawing die 4 closer bead 22 is again almost formed out. The thermoforming punch 4 remains in the position shown.

Fig. 1f zeigt die nächste Betätigung des Sickenstempels 12. Der Flanschbereich ist durch den Tiefziehvorgang so schmal geworden, dass nur noch eine Sicke 22 eingearbeitet werden kann. Fig. 1f shows the next operation of the bead punch 12. The flange area has become so narrow by the deep drawing process that only one bead 22 can be incorporated.

Fig. 1g zeigt das letzte Tiefziehvorgangsinkrement. Der Tiefziehstempel 4 wird in diesem Beispiel bis zum Anschlag an den Formabschnitt 8 des Tiefziehgesenks 6 gefahren. Das Werkstück 20 wird dadurch nahezu vollständig aus dem Bereich zwischen Führungsabschnitt 14 und Sickenstempel 12 herausgezogen. Der Tiefziehvorgang ist damit beendet. Der Tiefziehstempel 4 kann nun angehoben werden, um das fertige Ziehteil aus dem Tiefziehgesenk 6 zu entfernen. Fig. 1g shows the last thermoforming increment. The thermoforming punch 4 is moved in this example to the stop on the mold section 8 of the deep drawing die 6. The workpiece 20 is thereby almost completely pulled out of the area between the guide section 14 and the punch 12. The thermoforming process is over. The thermoforming punch 4 can now be raised to remove the finished drawn part of the deep-drawing die 6.

Claims (5)

  1. Method for controlling the flow of material when deep-drawing a workpiece, characterised in that the deep-drawing process is performed incrementally, and in that at least one bead is incorporated into the flange region of the workpiece prior to each increment of the deep-drawing process.
  2. Method according to Claim 1, characterised in that the bead is only incorporated into the region of corners of the workpiece which corners are to be formed.
  3. Method according to Claim 1 or 2, characterised in that the bead shape is partly or fully taken out again by the deep-drawing process increment which follows the incorporation of the bead.
  4. Method according to any one of Claims 1 to 3, characterised in that the bead is incorporated with rounded contours.
  5. Method according to any one of Claims 1 to 4, characterised in that the bead is incorporated with walls running parallel and/or inclined to the deep-drawing direction.
EP09730365.5A 2008-04-07 2009-03-31 Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device Not-in-force EP2259883B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008017728A DE102008017728B4 (en) 2008-04-07 2008-04-07 Method for material flow control during deep drawing of a workpiece
PCT/EP2009/053835 WO2009124860A1 (en) 2008-04-07 2009-03-31 Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device

Publications (2)

Publication Number Publication Date
EP2259883A1 EP2259883A1 (en) 2010-12-15
EP2259883B1 true EP2259883B1 (en) 2013-07-31

Family

ID=40727250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09730365.5A Not-in-force EP2259883B1 (en) 2008-04-07 2009-03-31 Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device

Country Status (4)

Country Link
US (1) US9327332B2 (en)
EP (1) EP2259883B1 (en)
DE (1) DE102008017728B4 (en)
WO (1) WO2009124860A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2695101C (en) * 2010-03-01 2012-10-16 Honda Motor Co., Ltd. Reducing waste in metal stamping processes and systems therefor
US10160024B2 (en) 2012-06-07 2018-12-25 Toyo Seikan Group Holdings, Ltd. Deep-drawing method and forming die therefor
DE102014211220A1 (en) * 2014-06-12 2015-12-17 Volkswagen Aktiengesellschaft Sheet metal working tool with at least one retaining device and method for operating this drawing tool
GB2548231A (en) * 2014-09-12 2017-09-13 Honda Motor Co Ltd Press forming method and plate material expansion device used in said method
DE102015101717A1 (en) * 2015-02-06 2016-08-11 Thyssenkrupp Ag Method and device for projecting a workpiece
CN105149455B (en) * 2015-09-28 2017-04-05 华南理工大学 A kind of vertical stilling well drawing forming method and its mould
US20190255587A1 (en) * 2018-02-20 2019-08-22 GM Global Technology Operations LLC Stamped component with improved formability
US11845122B2 (en) * 2020-11-24 2023-12-19 Fca Us Llc Stamping machine and method including variable binder gap
US11766709B2 (en) * 2021-03-08 2023-09-26 Ford Global Technologies, Llc Forming die with reverse bead geometry
US20230026889A1 (en) * 2021-07-22 2023-01-26 Ford Motor Company Controllable and adjustable stamping draw bead with reverse bead geometry

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH629981A5 (en) * 1978-06-08 1982-05-28 Aluminiumwerke Ag Rorschach Apparatus for the deep-drawing of a drawn part
JPS59206120A (en) 1983-05-07 1984-11-21 Toyota Motor Corp Method and device for forming drawing press
US4615205A (en) * 1984-06-18 1986-10-07 Rca Corporation Forming a shadow mask from a flat blank
JPS6427726A (en) * 1987-07-22 1989-01-30 Honda Motor Co Ltd Springback preventing press die
JP2579318B2 (en) 1987-07-30 1997-02-05 旭化成工業株式会社 Underground forming method of columnar hardened body using fabric tubular body
JPS6433315U (en) * 1987-08-12 1989-03-01
JP2605324B2 (en) * 1988-01-21 1997-04-30 三菱電機株式会社 SHADOW MASK MOLDING APPARATUS AND SHADOW MASK MOLDING METHOD
JPH0366423A (en) * 1989-08-01 1991-03-22 Toyota Auto Body Co Ltd Forming method by deep drawing and die for drawing press
IT1239511B (en) * 1990-03-30 1993-11-03 Videocolor Spa METHOD OF FORMING A SHADOW MASK FOR A TUBE OF REPRODUCTION OF COLOR IMAGES
JPH0483419A (en) 1990-07-26 1992-03-17 Seiko Epson Corp Semiconductor device
JP2518827Y2 (en) * 1990-11-29 1996-11-27 トヨタ車体株式会社 Drawing device
DE10209475A1 (en) * 2002-03-05 2003-10-02 Schuler Pressen Gmbh & Co Material flow altering device for deep drawing of workpiece has holding element exerting clamping pressure which can be varied
DE10233008A1 (en) * 2002-07-20 2004-02-12 Nothelfer Gmbh Process for material flow control when deep-drawing sheet metal and deep-drawing tool
DE10334483B4 (en) * 2003-07-29 2006-09-28 Daimlerchrysler Ag Method and drawing tool for producing a sheet metal part from a circuit board
JP2005095925A (en) * 2003-09-24 2005-04-14 Nissan Motor Co Ltd Method for forming panel parts and laser beam welding method
DE102006003268B4 (en) * 2006-01-24 2008-02-07 Ford Global Technologies, LLC, Dearborn Method and thermoforming device for deep drawing metal sheets
US8756970B2 (en) * 2011-03-14 2014-06-24 Ford Global Technologies, Llc Method of drawing a blank by preforming a channel in a preform that is subsequently drawn into a die cavity

Also Published As

Publication number Publication date
DE102008017728A1 (en) 2009-10-08
US20110094283A1 (en) 2011-04-28
WO2009124860A1 (en) 2009-10-15
US9327332B2 (en) 2016-05-03
EP2259883A1 (en) 2010-12-15
DE102008017728A9 (en) 2010-08-19
DE102008017728B4 (en) 2012-05-16

Similar Documents

Publication Publication Date Title
EP2259883B1 (en) Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device
EP1815922B1 (en) Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement
EP2701861B1 (en) Method and device for producing flangeless drawn parts
DE102007021798B4 (en) Device for the production of profiles
EP2036631B1 (en) Method and device for manufacturing stamping parts with a larger functional area
DE102009059197A1 (en) Method and device for producing a half-shell part
DE1918780C2 (en) Method and device for fine blanking of sheet metal workpieces
EP2508274B1 (en) Method and device for increasing the bearing area of a fine blanked workpiece with a tooth, a tooth section or the like
EP3790681B1 (en) Device and method for the removal of a workpiece
DE10041281C2 (en) Device for forming blanks from flexibly rolled metal strip
EP1781430B1 (en) Method and device for the production of a longitudinally welded hollow profile
EP2542363B1 (en) Method and device for drawing and trimming metal sheets
EP2357048B1 (en) Method and device for influencing the cutting and functional areas on fine-cut finished parts
EP2532452B1 (en) Method for punching and straightening sheet metal
DE102013001723B4 (en) Method for forming a sheet material with local influencing of the material flow by targeted separation of the sheet material, as well as separation device and forming tool for performing the method
DE102014115073A1 (en) Method and device for producing a collar on a workpiece
DE102015101377A1 (en) Method and device for producing a collar on a workpiece
EP1741497B1 (en) Method and tool for producing without cutting a notch in a workpiece and workpiece with such notch
DE19911125C1 (en) Workpiece cutting/perforation forms a pressure zone with a pressure medium on one side with a cutting edge and a spaced auxiliary cutting edge on the other workpiece side giving cut edges with low distortion and small flash height
DE102006034304A1 (en) Punching press and method for operating a punch press
WO2005007316A1 (en) Method and device for machining edge regions of cylindrical hollow bodies
DE2507511C2 (en) Process for the production of sink unit covers with at least one basin by deep drawing and a device for carrying out the process
DE102007027871B4 (en) Method for producing a one-piece turnbuckle
DE102007049866B4 (en) Method, workpiece and device for the positive clamping and fixing of workpieces by means of a blocking bead
DE102018133075A1 (en) Tool for forming sheet metal parts using the deep-drawing process

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100927

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GOEHLER, KLAUS

Inventor name: SAVVAS, KONSTANTINOS

Inventor name: FLEHMIG, THOMAS

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 624309

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130815

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009007677

Country of ref document: DE

Effective date: 20130926

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130731

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131202

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131031

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131130

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20140224

Year of fee payment: 6

Ref country code: SE

Payment date: 20140318

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20140320

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140318

Year of fee payment: 6

26N No opposition filed

Effective date: 20140502

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009007677

Country of ref document: DE

Effective date: 20140502

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20140318

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 624309

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150331

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20151130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150401

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20090331

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20200319

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502009007677

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211001