EP1003616A1 - Device and method for forming, in particular cold-forming, workpieces - Google Patents

Device and method for forming, in particular cold-forming, workpieces

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Publication number
EP1003616A1
EP1003616A1 EP98943813A EP98943813A EP1003616A1 EP 1003616 A1 EP1003616 A1 EP 1003616A1 EP 98943813 A EP98943813 A EP 98943813A EP 98943813 A EP98943813 A EP 98943813A EP 1003616 A1 EP1003616 A1 EP 1003616A1
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EP
European Patent Office
Prior art keywords
stroke
feed
workpiece
deformation die
frequency generating
Prior art date
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Granted
Application number
EP98943813A
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German (de)
French (fr)
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EP1003616B1 (en
Inventor
Fritz Binhack
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Feiss GmbH
Original Assignee
Gebr Felss GmbH and Co KG
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Application filed by Gebr Felss GmbH and Co KG filed Critical Gebr Felss GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/004—Extruding metal; Impact extrusion using vibratory energy

Definitions

  • the invention relates to a device for shaping, in particular for cold shaping, in this case in particular for cold extrusion, a workpiece, which has a shaping die and a feed device, by means of which a relative movement between the workpiece and the shaping die can be generated, and a method for shaping, in particular one Cold forming, a workpiece in which a Relative movement between a workpiece and a deformation die is generated.
  • Such a device and such a method are generally known and therefore do not have to be described in more detail.
  • a disadvantage of the known device and the known method is that high feed forces are required to achieve the desired cold deformation of the workpiece.
  • the device provided for carrying out the method has a device with which the anvil can be moved back and forth.
  • the device has a frequency generating device which interacts with the feed device, by means of which the relative movement between the workpiece and the deformation die generated by the feed device can be modulated such that after a forward stroke in which the workpiece is in the feed direction and / or the deformation die traverses a first stroke, in a subsequent backward stroke a movement of the deformation die and / or the workpiece in a direction opposite to the feed direction can be carried out by a second stroke.
  • the relative movement between the workpiece and the deformation die generated by the feed device is modulated such that after a forward stroke in which the workpiece and / or the deformation die passes through a first stroke in the feed direction, a movement takes place in a subsequent reverse stroke the deformation die and / or the workpiece can be carried out in a direction opposite to the feed direction by a second stroke.
  • the measures according to the invention advantageously achieve that the deformation, in particular cold working, for. B. one
  • a workpiece feed force required to achieve a defined final deformation of the workpiece is significantly lower than with a conventional device. This not only has the effect that the energy required to drive the device according to the invention is reduced and significant energy savings are achieved.
  • the lower forces occurring when deforming with the device according to the invention also permit a lighter and therefore less expensive construction of the device according to the invention, as a result of which the production costs are also reduced.
  • the "hammer-like" The application of force to the cold-formed workpiece by the intermittent, stroke-like feed movement advantageously allows high-quality cold forming with minimal effort and wear. Another advantage is that the workpiece is subjected to only slight axial forces, so that buckling and deformation, also in the form of bulges, are largely prevented.
  • FIG. 1 shows a first exemplary embodiment of a device
  • Figure 2 shows a second embodiment of a device.
  • the first exemplary embodiment of a device 1 for cold forming, in particular for cold extrusion, of a workpiece 2 shown in FIG. 1 has a deformation die 3 which can be moved relative to the workpiece 2 by a feed device 5.
  • the feed device 5 thus generates a relative movement between the deformation die 3 and the workpiece 2 clamped in a clamping unit 7. If the deformation die 3 is moved by the feed device 5 in its feed direction P against the workpiece 2 clamped in the case shown here, this occurs Workpiece 2 into the deformation die 3 and is cold-formed in a manner known per se.
  • the movement running in the feed direction P is modified by a frequency generating device 10 such that the deformation die 3 instead of a uniform one in the feed direction P executes a stroke-like movement, in which it is provided that after a forward stroke directed in the feed direction P, in which the deformation die 3 is moved forward by a first stroke, the deformation die 3 in a subsequent reverse stroke through the feed device 5 is withdrawn by a second stroke. In the subsequent forward stroke, the deformation die 3 is moved forward again, specifically beyond the end point of the preceding forward stroke.
  • the deformation die 3 has a higher kinetic energy than it does when it hits the area of the workpiece 2 to be machined in the next step
  • Continuous application of force is the case, since the return movement of the deformation die 3 prior to its renewed acceleration by the feed device 5 in the feed direction P has the effect that during the feed movement the deformation die 3 moves along the region of the workpiece 2 that was cold-deformed in the previous forward stroke and this region essentially can go through without resistance.
  • the retraction of the deformation die 3 before the next step of the cold deformation process has the effect that an improved supply of lubricating oil, which is supplied by a lubricating oil supply device 8 shown schematically in FIG. 1, is improved.
  • the frequency generator 10 generates the forward movement of the deformation die 3 in Feed direction P modulating frequency is in the range of about 5 to 30 Hz and is preferably 10 to 20 Hz.
  • the second stroke path of the backward movement of the deformation die 3 is essentially only half of the first stroke path provided during the feed.
  • the frequency generating device 10 can operate hydraulically, pneumatically or mechanically, although electromagnetic excitation of the frequency modulating the feed movement of the feed device 5 is also conceivable for certain cases.
  • the frequency generating device 10 into the feed device 5, so that the feed movement generated by the feed device 5 is directly modulated. This can be done in particular by the fact that the oil supply to a feed cylinder 5 'of the feed device 5 is regulated servo-hydraulically or proportionally hydraulically, so that the cylinder 5' causing the feed of the deformation die 3 oscillates periodically.
  • the exemplary embodiment of a device 1 'shown in FIG. 2 essentially corresponds to the device 1 of the first exemplary embodiment, so that the same parts can be provided with the same reference numerals and no longer have to be described in more detail.
  • the essential difference between the two exemplary embodiments is that in the device 1 * the deformation die 3 is arranged in a stationary manner, while the workpiece 2 is axially displaceable relative to the deformation die 3. Accordingly, the feed device 5 and the frequency generating device 10 cooperating with it act on the workpiece 2 or on the clamping unit 7 which clamps the workpiece 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

Described is an apparatus for the cold-forming, in particular for the cold extrusion of a workpiece, which has a die (3) and a feeding device (5) by means of which a relative motion can be produced between the workpiece (2) and the die (3). It is provided that the apparatus (1; 1') has a frequency generating device (10) working together with the feeding device (5) by means of which the relative motion between workpiece (2) and die (3), produced by the feeding device (5), can be modulated in such a way that after a forward stroke, in which the workpiece (2) and/or the die (3) is moved a first stroke length in the direction of feed (P), in a subsequent reverse stroke, a movement of the die (3) and/or of the workpiece (2) by a second stroke length can be carried out in a direction contrary to the direction of feed (P).

Description

Vorrichtung und Verfahren zum Verformen, insbesondere zum Kaltverformen, von Werkstücken Device and method for shaping, in particular for cold shaping, workpieces
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung zum Verformen, insbesondere zum Kaltverformen, hierbei insbesondere zum Kaltfließpressen, eines Werkstücks, die eine Verformungsmatritze und eine Vorschubeinrichtung, durch die eine Relativbewegung zwischen dem Werkstück und der Verformungsmatritze erzeugbar ist, aufweist, sowie ein Verfahren zur Verformung, insbesondere einer Kaltverformung, eines Werkstücks, bei dem durch eine Vorschubeinrichtung eine Relativbewegung zwischen einem Werkstück und einer Verformungsmatritze erzeugt wird.The invention relates to a device for shaping, in particular for cold shaping, in this case in particular for cold extrusion, a workpiece, which has a shaping die and a feed device, by means of which a relative movement between the workpiece and the shaping die can be generated, and a method for shaping, in particular one Cold forming, a workpiece in which a Relative movement between a workpiece and a deformation die is generated.
Eine derartige Vorrichtung und ein derartiges Verfahren sind allgemein bekannt und müssen daher nicht mehr näher beschrieben werden. Nachteilig an der be- kannten Vorrichtung und an dem bekannten Verfahren ist, daß hohe Vorschubkräfte zur Erzielung der gewünschten Kaltverformung des Werkstücks erforderlich sind.Such a device and such a method are generally known and therefore do not have to be described in more detail. A disadvantage of the known device and the known method is that high feed forces are required to achieve the desired cold deformation of the workpiece.
Aus der US-PS 4,197,757 ist ein Verfahren und eine Vorrichtung zur Kaltverformung eines Werkstücks bekannt, wodurch dieses in die gewünschte geometri- sehe Konfiguration übergeführt werden kann. Hierzu ist vorgesehen, daß das Werkstück in eine Ausnehmung eingeführt wird, während die Ausnehmung offen ist, daß das eine Ende der Ausnehmung mit dem darin aufgenommenen Werkstück geschlossen und ein Amboß am anderen Ende angeordnet wird, um einen ringförmigen Raum zwischen Amboß und der Wand der Ausπehmung auszubil- den, daß dann die ringförmige Öffnung geschlossen und ein erster Druck wird auf einen ausgewählten Bereich des Werkstücks aufgebracht, derart, daß eine Extru- sion des Werkstücks über dem Amboß beginnt und die Ausnehmung ausgefüllt wird. Danach wird das Volumen des ringförmigen Raums zwischen dem Amboß und der Wand der Ausnehmung, in welche das Werkstück extrudiert wird, vergrö- ßert, während ein im wesentlichen gleichförmiger zweiter Druck auf das Werkstück, der entgegengesetzt der Flußrichtung des Metalls ist, ausgeübt wird, wobei die Größenordnung des zweiten Drucks kleiner als die des ersten Drucks ist, wodurch das Metall im wesentlichen gleichförmig im Verlauf der Extrusion fließt. Die zur Duchführung des Verfahrens vorgesehene Vorrichtung weist eine Einrichtung auf, mit der der Amboß hin und her bewegt werden kann.From US Pat. No. 4,197,757 a method and a device for cold forming a workpiece is known, as a result of which this can be converted into the desired geometrical configuration. For this purpose, it is provided that the workpiece is inserted into a recess while the recess is open, that one end of the recess with the workpiece accommodated therein is closed and an anvil is arranged at the other end to create an annular space between the anvil and the wall of the Training that the annular opening is then closed and a first pressure is applied to a selected area of the workpiece such that the workpiece begins to extrude over the anvil and the recess is filled. Thereafter, the volume of the annular space between the anvil and the wall of the recess into which the workpiece is extruded is increased while a substantially uniform second pressure is applied to the workpiece which is opposite to the direction of flow of the metal, whereby the magnitude of the second pressure is less than that of the first pressure, whereby the metal flows substantially uniformly in the course of the extrusion. The device provided for carrying out the method has a device with which the anvil can be moved back and forth.
Es ist die Aufgabe der Erfindung, eine Vorrichtung und ein Verfahren der eingangs genannten Art derart weiterzubilden, daß eine Reduzierung der zur Verformung, insbesondere einer Kaltverformung, eines Werkstücks erforderlichen Vorschubkräfte erreicht wird.It is the object of the invention to develop a device and a method of the type mentioned in such a way that a reduction in the Deformation, in particular cold forming, of a workpiece, the feed forces required.
Diese Aufgabe wird durch die erfindungsgemäße Vorrichtung dadurch gelöst, daß die Vorrichtung eine mit der Vorschubeinrichtung zusammenwirkende Fre- quenzerzeugungseinrichtung aufweist, durch die die von der Vorschubeinrichtung erzeugte Relativbewegung zwischen Werkstück und Verformungsmatritze derart modulierbar ist, daß nach einem Vorwärtshub, bei dem in Vorschubrichtung das Werkstück und/oder die Verformungsmatritze einen ersten Hubweg durchläuft, in einem darauffolgenden Rückwärtshub eine Bewegung der Verformungsmatritze und/oder des Werkstücks in einer der Vorschubrichtung entgegengesetzten Richtung um einen zweiten Hubweg durchführbar ist.This object is achieved by the device according to the invention in that the device has a frequency generating device which interacts with the feed device, by means of which the relative movement between the workpiece and the deformation die generated by the feed device can be modulated such that after a forward stroke in which the workpiece is in the feed direction and / or the deformation die traverses a first stroke, in a subsequent backward stroke a movement of the deformation die and / or the workpiece in a direction opposite to the feed direction can be carried out by a second stroke.
Beim erfindungsgemäßen Verfahren ist vorgesehen, daß die von der Vorschubeinrichtung erzeugte Relativbewegung zwischen dem Werkstück und der Verformungsmatritze derart moduliert wird, daß nach einem Vorwärtshub, bei dem in Vorschubrichtung das Werkstück und/oder die Verformungsmatritze einen ersten Hubweg durchläuft, in einem darauffolgenden Rückwärtshub eine Bewegung der Verformungsmatritze und/oder des Werkstücks in einer der Vorschubrichtung entgegengesetzten Richtung um einen zweiten Hubweg durchführbar ist.In the method according to the invention it is provided that the relative movement between the workpiece and the deformation die generated by the feed device is modulated such that after a forward stroke in which the workpiece and / or the deformation die passes through a first stroke in the feed direction, a movement takes place in a subsequent reverse stroke the deformation die and / or the workpiece can be carried out in a direction opposite to the feed direction by a second stroke.
Durch die erfindungsgemäßen Maßnahmen wird in vorteilhafter Art und Weise er- reicht, daß die zur Verformung, insbesondere zur Kaltverformung, z. B. einesThe measures according to the invention advantageously achieve that the deformation, in particular cold working, for. B. one
Kaltfließpressen, eines Werkstücks erforderliche Vorschubkraft, die zur Erzielung einer definierten Endverformung des Werkstück erforderlich ist, deutlich geringer ist als bei einer konventionellen Vorrichtung. Dies bewirkt nicht nur, daß die zum Antrieb der erfindungsgemäßen Vorrichtung erforderliche Energie verringert und eine deutlichen Energieeinsparung erzielt wird. Die geringeren, beim Verformen mit der erfindungsgemäßen Vorrichtung auftretenden Kräfte erlauben auch eine leichtere und daher kostengünstigere Bauweise der erfindungsgemäßen Vorrichtung, wodurch auch die Herstellungskosten gesenkt werden. Die "hammerartige" Kraftbeaufschlagung des kaltzuverformenden Werkstücks durch die intermittierende, hubartige Vorschubbewegung erlaubt in vorteilhafter Art und Weise eine hochqualitative Kaltverformung mit minimalem Aufwand und Verschleiß. Ein weiterer Vorteil besteht darin, daß das Werkstück nur geringen Axialkräften unter- worfen wird, so daß Ausknickungen und Deformationen, auch in Form von Ausbauchungen, weitgehend verhindert werden.Cold extrusion, a workpiece feed force required to achieve a defined final deformation of the workpiece is significantly lower than with a conventional device. This not only has the effect that the energy required to drive the device according to the invention is reduced and significant energy savings are achieved. The lower forces occurring when deforming with the device according to the invention also permit a lighter and therefore less expensive construction of the device according to the invention, as a result of which the production costs are also reduced. The "hammer-like" The application of force to the cold-formed workpiece by the intermittent, stroke-like feed movement advantageously allows high-quality cold forming with minimal effort and wear. Another advantage is that the workpiece is subjected to only slight axial forces, so that buckling and deformation, also in the form of bulges, are largely prevented.
Weitere vorteilhafte Weiterbildung der Erfindung sind Gegenstand der Unteransprüche.Further advantageous developments of the invention are the subject of the dependent claims.
Weitere Einzelheiten und Vorteile der Erfindung sind den Ausführungsbeispielen zu entnehmen, die im folgenden anhand der Figuren beschrieben werden. Es zeigen:Further details and advantages of the invention can be found in the exemplary embodiments which are described below with reference to the figures. Show it:
Figur 1 ein erstes Ausfütirungsbeispiel einer Vorrichtung,FIG. 1 shows a first exemplary embodiment of a device,
undand
Figur 2 ein zweites Ausführungsbeispiel einer Vorrichtung.Figure 2 shows a second embodiment of a device.
Das in Figur 1 dargestellte erste Ausführungsbeispiel einer Vorrichtung 1 zur Kaltverformung, insbesondere zum Kaltfließpressen, eines Werkstücks 2 weist eine Verformungsmatritze 3 auf, die durch eine Vorschubeinrichtung 5 relativ zum Werkstück 2 bewegbar ist. Die Vorschubeinrichtung 5 erzeugt also eine Relativbewegung zwischen Verformungsmatritze 3 und dem in einer Spanneinheit 7 ein- gespannten Werkstück 2. Wird die Verformungsmatritze 3 durch die Vorschubeinrichtung 5 in ihrer Vorschubrichtung P gegen das in dem hier gezeigten Fall ortsfest eingespannte Werkstück 2 bewegt, so tritt das Werkstück 2 in die Verformungsmatritze 3 ein und wird in an und für sich bekannter Art und Weise kaltverformt. Indem nun bei der Vorrichtung 1 vorgesehen wird, daß - im Gegensatz zu bekannten Vorrichtung, bei denen die Vorschubeinrichtung eine kontinuierliche Bewegung in Vorschubrichtung P bewirkt - die in Vorschubrichtung P verlaufende Bewegung durch eine Frequenzerzeugungseinrichtung 10 derart modifiziert wird, daß die Verformungsmatritze 3 anstelle einer gleichförmig in Vorschubrichtung P verlaufenden Bewegung eine hubartige Bewegung ausführt, bei der vorgesehen ist, daß nach einem in Vorschubrichtung P gerichteten Vorwärtshub, bei dem die Verformungsmatritze 3 um einen ersten Hubweg vorwärts bewegt wird, die Verformungsmatritze 3 in einem daran anschließenden Rückwärtshub durch die Vor- Schubeinrichtung 5 um einen zweiten Hubweg zurückgezogen wird. Im darauffolgenden Vorwärtshub wird die Verformungsmatritze 3 wieder nach vorne bewegt, und zwar über den Endpunkt des vorangehenden Vorwärtshubes hinaus. Durch diese "hammerartige" Beaufschlagung des Werkstücks 2 durch die Verformungsmatritze 3 wird in vorteilhafter Art und Weise erreicht, daß die Verformungsmatrit- ze 3 vor ihrem Auftreffen auf dem im nächsten Arbeitsschritt zu bearbeitenden Bereich des Werkstücks 2 eine höhere kinetische Energie aufweist als es bei einer kontinuierlichen Kraftbeaufschlagung der Fall ist, da die Rückbewegung der Verformungsmatritze 3 vor deren erneuten Beschleunigung durch die Vorschubeinrichtung 5 in Vorschubrichtung P bewirkt, daß bei der Vorschubbewegung die Verformungsmatritze 3 sich entlang des bereits im vorhergehenden Vorwärtshub kaltverformten Bereichs des Werkstücks 2 bewegt und diesen Bereich im wesentlichen ohne Widerstand durchlaufen kann. Außerdem bewirkt das Zurückziehen der Verformungsmatritze 3 vor dem nächsten Schritt des Kaltverformungsvorgan- ges, daß hierdurch eine verbesserte Zuführung von Schmieröl, das durch eine in Figur 1 schematisch dargestellte Schmierölzuführungseinrichtung 8 zugeführt wird, verbessert wird.The first exemplary embodiment of a device 1 for cold forming, in particular for cold extrusion, of a workpiece 2 shown in FIG. 1 has a deformation die 3 which can be moved relative to the workpiece 2 by a feed device 5. The feed device 5 thus generates a relative movement between the deformation die 3 and the workpiece 2 clamped in a clamping unit 7. If the deformation die 3 is moved by the feed device 5 in its feed direction P against the workpiece 2 clamped in the case shown here, this occurs Workpiece 2 into the deformation die 3 and is cold-formed in a manner known per se. By now providing in device 1 that - in contrast to known device in which the feed device causes a continuous movement in the feed direction P - the movement running in the feed direction P is modified by a frequency generating device 10 such that the deformation die 3 instead of a uniform one in the feed direction P executes a stroke-like movement, in which it is provided that after a forward stroke directed in the feed direction P, in which the deformation die 3 is moved forward by a first stroke, the deformation die 3 in a subsequent reverse stroke through the feed device 5 is withdrawn by a second stroke. In the subsequent forward stroke, the deformation die 3 is moved forward again, specifically beyond the end point of the preceding forward stroke. By this "hammer-like" action on the workpiece 2 by the deformation die 3, it is advantageously achieved that the deformation die 3 has a higher kinetic energy than it does when it hits the area of the workpiece 2 to be machined in the next step Continuous application of force is the case, since the return movement of the deformation die 3 prior to its renewed acceleration by the feed device 5 in the feed direction P has the effect that during the feed movement the deformation die 3 moves along the region of the workpiece 2 that was cold-deformed in the previous forward stroke and this region essentially can go through without resistance. In addition, the retraction of the deformation die 3 before the next step of the cold deformation process has the effect that an improved supply of lubricating oil, which is supplied by a lubricating oil supply device 8 shown schematically in FIG. 1, is improved.
Bei der Vorrichtung 1 wird bevorzugt, daß die von der Frequenzerzeugungseinrichtung 10 erzeugte, die Vorwärtsbewegung der Verformungsmatritze 3 in Vorschubrichtung P modulierende Frequenz im Bereich von etwa 5 bis 30 Hz liegt und vorzugsweise 10 bis 20 Hz beträgt.In device 1, it is preferred that the frequency generator 10 generates the forward movement of the deformation die 3 in Feed direction P modulating frequency is in the range of about 5 to 30 Hz and is preferably 10 to 20 Hz.
Desweiteren wird bevorzugt, daß der zweite Hubweg der Rückwärtsbewegung der Verformungsmatritze 3 im wesentlichen nur die Hälfte des beim Vorschub vorgesehenen ersten Hubweges ist.Furthermore, it is preferred that the second stroke path of the backward movement of the deformation die 3 is essentially only half of the first stroke path provided during the feed.
Die Frequenzerzeugungseinrichtung 10 kann dabei hydraulisch, pneumatisch oder mechanisch arbeiten, wobei aber auch für bestimmte Fälle eine elektromagnetische Erregung der die Vorschubbewegung der Vorschubeinrichtung 5 modulierenden Frequenz denkbar ist.The frequency generating device 10 can operate hydraulically, pneumatically or mechanically, although electromagnetic excitation of the frequency modulating the feed movement of the feed device 5 is also conceivable for certain cases.
Es ist aber auch möglich, die Frequenzerzeugungseinrichtung 10 in die Vorschubeinrichtung 5 zu integrieren, so daß die von der Vorschubeinrichtung 5 erzeugte Vorschubbewegung unmittelbar moduliert wird. Dies kann insbesondere dadurch geschehen, daß die Ölversorgung eines Vorschubzylinders 5' der Vorschubeinrichtung 5 servohydraulisch oder proportionalhydraulisch geregelt wird, so daß der den Vorschub der Verformungsmatritze 3 bewirkende Zylinder 5' periodisch oszilliert.However, it is also possible to integrate the frequency generating device 10 into the feed device 5, so that the feed movement generated by the feed device 5 is directly modulated. This can be done in particular by the fact that the oil supply to a feed cylinder 5 'of the feed device 5 is regulated servo-hydraulically or proportionally hydraulically, so that the cylinder 5' causing the feed of the deformation die 3 oscillates periodically.
Das in der Figur 2 dargestellte Ausführungsbeispiel einer Vorrichtung 1' stimmt im wesentlichen mit der Vorrichtung 1 des ersten Ausführungsbeispiels überein, so daß gleiche Teile mit gleichen Bezugszeichen versehen werden können und nicht mehr näher beschrieben werden müssen. Der wesentliche Unterschied zwischen den beiden Ausführungsbeispielen besteht darin, daß bei der Vorrichtung 1* die Verformungsmatritze 3 ortsfest angeordnet ist, während das Werkstück 2 axial verschieblich zur Verformungsmatritze 3 ist. Demzufolge wirkt die Vorschubeinrichtung 5 und die mit ihr zusammenarbeitende Frequenzerzeugungseinrich- tung 10 auf das Werkstück 2 oder auf die das Werkstück 2 spannende Spanneinheit 7 ein. The exemplary embodiment of a device 1 'shown in FIG. 2 essentially corresponds to the device 1 of the first exemplary embodiment, so that the same parts can be provided with the same reference numerals and no longer have to be described in more detail. The essential difference between the two exemplary embodiments is that in the device 1 * the deformation die 3 is arranged in a stationary manner, while the workpiece 2 is axially displaceable relative to the deformation die 3. Accordingly, the feed device 5 and the frequency generating device 10 cooperating with it act on the workpiece 2 or on the clamping unit 7 which clamps the workpiece 2.

Claims

Patentansprüche claims
1. Vorrichtung zum Kaltverformen, insbesondere zum Kaltverformen oder Kaltfließpressen, eines Werkstück, die eine Verformungsmatritze (3) und eine Vorschubeinrichtung (5), durch die eine Relativbewegung zwischen dem Werkstück (2) und der Verformungsmatritze (3) erzeugbar ist, aufweist, dadurch gekennzeichnet, daß die Vorrichtung (1 ; 1') eine mit der Vorschubeinrichtung (5) zusammenwirkende Frequenzerzeugungseinrichtung (10) aufweist, durch die die von der Vorschubeinrichtung (5) erzeugte Relativbewegung zwischen Werkstück (2) und Verformungsmatritze (3) derart modulierbar ist, daß nach einem Vorwärtshub, bei dem das Werkstück (2) und/oder die1. Device for cold forming, in particular for cold forming or cold extrusion, of a workpiece, which has a deformation die (3) and a feed device (5), by means of which a relative movement between the workpiece (2) and the deformation die (3) can be generated, thereby characterized in that the device (1; 1 ') has a frequency generating device (10) which interacts with the feed device (5) and by means of which the relative movement between the workpiece (2) and the deformation die (3) generated by the feed device (5) can be modulated, that after a forward stroke in which the workpiece (2) and / or the
Verformungsmatritze (3) in Vorschubrichtung (P) einen ersten Hubweg durchläuft, in einem darauffolgenden Rückwärtshub eine Bewegung der Verformungsmatritze (3) und/oder des Werkstücks (2) in einer der Vorschubrichtung (P) entgegengesetzten Richtung um einen zweiten Hubweg durchführbar ist.Deformation die (3) runs through a first stroke in the feed direction (P), a movement of the deformation die (3) and / or the workpiece (2) in a direction opposite the feed direction (P) can be carried out by a second stroke in a subsequent reverse stroke.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die von der Frequenzerzeugungsrichtung (10) bewirkte Modulation der Vorschubbewegung des Werkstücks (2) und/oder der Verformungsmatritze (3) derart ist, daß der bei dem Vorwärtshub in Vorschubrichtung (P) zurückgelegte erste Hubweg größer als der beim darauffolgenden Rückwärtshub zurückgelegte zweite Hubweg ist.2. Apparatus according to claim 1, characterized in that the modulation of the feed movement of the workpiece (2) and / or the deformation die (3) caused by the frequency generation direction (10) is such that the first covered in the forward stroke in the feed direction (P) Stroke is greater than the second stroke traveled during the subsequent reverse stroke.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der beim Vorwärtshub zurückgelegte erste Hubweg etwa doppelt so groß ist als der beim Rückwärtshub durchlaufende zweite Hubweg. 3. Apparatus according to claim 2, characterized in that the first stroke covered during the forward stroke is approximately twice as large as the second stroke traveled during the reverse stroke.
4. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die von der Frequenzerzeugungseinrichtung (10) erzeugte Modulationsfrequenz im Bereich von etwa 5 bis 30 Hz liegt.4. Device according to one of the preceding claims, characterized in that the modulation frequency generated by the frequency generating device (10) is in the range of about 5 to 30 Hz.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die von der Fre- quenzerzeugungseinrichtung (10) erzeugte Modulationsfrequenz im Bereich zwischen 10 und 20 Hz liegt.5. The device according to claim 4, characterized in that the modulation frequency generated by the frequency generating device (10) is in the range between 10 and 20 Hz.
6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Vorschubeinheit (5) und die mit ihr zusammenwirkende Frequenzerzeugungseinrichtung (10) auf die Verformungsmatritze (3) einwirken.6. Device according to one of the preceding claims, characterized in that the feed unit (5) and the frequency generating device (10) cooperating with it act on the deformation die (3).
7. Vorrichtung nach einem der Ansprüche 1 bis 5 dadurch gekennzeichnet, daß die Vorschubeinheit (5) und die mit ihr zusammenwirkende Frequenzerzeugungseinrichtung (10) auf das Werkstück (2) einwirken.7. Device according to one of claims 1 to 5, characterized in that the feed unit (5) and the frequency generating device (10) cooperating with it act on the workpiece (2).
8. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Vorschubeinrichtung (5) und die mit ihr zusammenwirkende Frequenzer- zeugungseinrichtung (10) auf die Verformungsmatritze (3) und das Werkstück8. Device according to one of claims 1 to 5, characterized in that the feed device (5) and the interacting frequency generating device (10) on the deformation die (3) and the workpiece
(2) einwirken.(2) act.
9. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Frequenzerzeugungseinrichtung (10) eine hydraulisch, pneumatisch, mechanisch oder elektromagnetisch arbeitende Frequenzerzeu- gungseinrichtung ist.9. Device according to one of the preceding claims, characterized in that the frequency generating device (10) is a hydraulically, pneumatically, mechanically or electromagnetically operating frequency generating device.
10. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Frequenzerzeugungseinrichtung (10) in der Vorschubeinrichtung (5) derart integriert ist, daß die von der Vorschubeinrichtung (5) erzeugte Vorschubbewegung unmittelbar modulierbar ist.10. Device according to one of the preceding claims, characterized in that the frequency generating device (10) in the Feed device (5) is integrated in such a way that the feed movement generated by the feed device (5) can be directly modulated.
11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß ein Vorschubelement (5') der Vorschubeinrichtung (5) servohydraulisch oder proportional- hydraulisch regelbar ist.11. The device according to claim 10, characterized in that a feed element (5 ') of the feed device (5) is servo-hydraulic or proportional-hydraulic controllable.
12. Verfahren zur Kaltverformung eines Werkstücks, bei dem durch eine Vorschubeinrichtung (5) eine Relativbewegung zwischen einem Werkstück (2) und einer Verformungsmatritze (3) erzeugt wird, dadurch gekennzeichnet, daß die von der Vorschubeinrichtung (5) erzeugte Relativbewegung zwischen dem Werkstück (2) und der Verformungsmatritze (3) derart moduliert wird, daß nach einem Vorwärtshub, bei dem in Vorschubrichtung (P) das Werkstück (2) und/oder die Verformungsmatritze (3) einen ersten Hubweg durchläuft, in einem darauffolgenden Rückwärtshub eine Bewegung der Verformungsmatritze (3) und/oder des Werkstücks in einer zu der Vorschubrichtung (P) entgegengesetzten Richtung um einen zweiten Hubweg durchführbar ist.12. A method for cold forming a workpiece, in which a relative movement between a workpiece (2) and a deformation die (3) is generated by a feed device (5), characterized in that the relative movement between the workpiece (5) generated by the feed device (5) 2) and the deformation die (3) is modulated such that after a forward stroke, in which the workpiece (2) and / or the deformation die (3) runs through a first stroke path in the feed direction (P), a movement of the deformation die in a subsequent backward stroke (3) and / or the workpiece can be carried out in a direction opposite to the feed direction (P) by a second stroke.
13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß der bei dem Vorwärtshub in Vorschubrichtung (P) zurückgelegte erste Hubweg größer als der beim darauffolgenden Rückwärshub zurückgelegte zweite Hubweg ist.13. The method according to claim 12, characterized in that the first stroke covered during the forward stroke in the feed direction (P) is greater than the second stroke covered during the subsequent heat recovery stroke.
14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, daß der beim Vor- schub zurückgelegte erste Hubweg etwa doppelt so groß ist als der beim14. The method according to claim 13, characterized in that the first stroke traveled during the feed is approximately twice as large as that during
Rückwärtshub durchlaufende zweite Hubweg. Second stroke running through reverse stroke.
15. Verfahren nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, daß eine die Reiativbewegung modulierende Modulationsfrequenz im Bereich von 5 bis 30 Hz und vorzugsweise zwischen 10 und 20 Hz liegt.15. The method according to any one of claims 12 to 14, characterized in that a modulating frequency modulating the sequential movement is in the range from 5 to 30 Hz and preferably between 10 and 20 Hz.
16. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeich- net, daß die Verformungsmatritze (3) von der Vorschubeinrichtung (5) und einer mit ihr zusammenwirkenden, die Modulationsfrequenz erzeugenden Frequenzerzeugungseinrichtung (10) bewegt wird.16. The method according to any one of the preceding claims, characterized in that the deformation die (3) of the feed device (5) and a cooperating with it, the modulation frequency generating frequency generating device (10) is moved.
17. Verfahren nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, daß das Werkstück (2) von der Vorschubeinrichtung (5) und der mit ihr zu- sammenwirkenden Frequenzerzeugungseinrichtung (10) bewegt wird.17. The method according to any one of claims 12 to 15, characterized in that the workpiece (2) is moved by the feed device (5) and the frequency generating device (10) cooperating with it.
18. Verfahren nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, die Verformungsmatritze (3) und das Werkstück (2) von der Vorschubeinrichtung (5) und der mit ihr zusammenwirkenden Frequenzerzeugungseinrichtung (10) bewegt werden. 18. The method according to any one of claims 12 to 15, characterized in that the deformation die (3) and the workpiece (2) are moved by the feed device (5) and the frequency generating device (10) cooperating with it.
EP98943813A 1997-08-16 1998-07-31 Device and method for forming, in particular cold-forming, workpieces Expired - Lifetime EP1003616B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19735486A DE19735486C2 (en) 1997-08-16 1997-08-16 Device and method for cold forming workpieces
DE19735486 1997-08-16
PCT/EP1998/004800 WO1999008813A1 (en) 1997-08-16 1998-07-31 Device and method for forming, in particular cold-forming, workpieces

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EP1003616A1 true EP1003616A1 (en) 2000-05-31
EP1003616B1 EP1003616B1 (en) 2002-07-10

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EP (1) EP1003616B1 (en)
JP (1) JP3572544B2 (en)
KR (1) KR100406080B1 (en)
AT (1) ATE220356T1 (en)
CA (1) CA2301037C (en)
DE (2) DE19735486C2 (en)
ES (1) ES2179530T3 (en)
WO (1) WO1999008813A1 (en)

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EP1003616B1 (en) 2002-07-10
JP3572544B2 (en) 2004-10-06
KR20010022478A (en) 2001-03-15
DE59804736D1 (en) 2002-08-14
CA2301037A1 (en) 1999-02-25
JP2001514969A (en) 2001-09-18
US6212929B1 (en) 2001-04-10
CA2301037C (en) 2008-10-21
ATE220356T1 (en) 2002-07-15
DE19735486C2 (en) 2000-07-20
KR100406080B1 (en) 2003-11-17
ES2179530T3 (en) 2003-01-16
DE19735486A1 (en) 1999-03-18
WO1999008813A1 (en) 1999-02-25

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