EP2711103B1 - Method and device for forming workpieces by spinning - Google Patents

Method and device for forming workpieces by spinning Download PDF

Info

Publication number
EP2711103B1
EP2711103B1 EP12006680.8A EP12006680A EP2711103B1 EP 2711103 B1 EP2711103 B1 EP 2711103B1 EP 12006680 A EP12006680 A EP 12006680A EP 2711103 B1 EP2711103 B1 EP 2711103B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
forming rollers
enveloping
rollers
forming
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.)
Active
Application number
EP12006680.8A
Other languages
German (de)
French (fr)
Other versions
EP2711103A1 (en
Inventor
Karl-Heinz Köstermeier
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.)
Repkon Machine and Tool Industry and Trade Inc
Original Assignee
Repkon Machine and Tool Industry and Trade Inc
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 Repkon Machine and Tool Industry and Trade Inc filed Critical Repkon Machine and Tool Industry and Trade Inc
Priority to EP12006680.8A priority Critical patent/EP2711103B1/en
Priority to ES12006680.8T priority patent/ES2527395T3/en
Priority to PCT/EP2013/002824 priority patent/WO2014044396A1/en
Priority to MX2014014793A priority patent/MX2014014793A/en
Priority to US14/384,845 priority patent/US9662695B2/en
Publication of EP2711103A1 publication Critical patent/EP2711103A1/en
Application granted granted Critical
Publication of EP2711103B1 publication Critical patent/EP2711103B1/en
Active 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
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • 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
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the invention relates to a method for forming workpieces according to the preamble of claim 1 and a device for forming workpieces according to claim 5 (see, for example US 2010/0236122 ).
  • FIGS. 1 and 2 Longitudinal sectional view
  • a workpiece 4 is set in rotation in a rotational direction 6 and then by externally brought to the workpiece, mounted in a bearing housing 1 rollers or rollers 2 under relative displacement of the workpiece. 4 is deformed in an axial feed direction 5 relative to the forming rollers 2.
  • this deformation takes place in such a way that the outer forming rollers 2 press the material of the workpiece 4 in the region of deformation against an inner mandrel 3, so that the material is partially axially, radially and tangentially placed in a flow state and this to a Reduction of the wall thickness of the workpiece 4 leads, with the resulting reduced wall thickness results from the distance between the forming roller 2 and inner mandrel 3.
  • the possible reduction of the wall thickness of the workpiece 4 is limited by the size of the wall thickness, the strength of the material, the friction between the inner wall of the preform 4 and the inner mandrel 3 and the possible number of forming rollers 2 on the circumference of the workpiece 4.
  • the effect of the compressive force of the forming rollers 2 reduces with increasing wall thickness to be reshaped, so that it is no longer possible from a certain wall thickness to bring the material in the pressure range 7 (effective range) of the forming rollers 2 in a flow state.
  • the thickness of the walls to be reduced with the known flow-forming process is limited by the lack of yield stress in the material.
  • the object of the invention is to provide a method and a device in which the shaping of rotationally symmetrical workpieces with constant or different wall thicknesses is possible even with larger wall thicknesses.
  • the inner diameter of the workpiece is widened by pressing inner forming rollers of an inner forming unit and / or the outer diameter is reduced by pressing the outer forming rollers;
  • the inner mandrel can also be displaced by the inner forming unit in the above-mentioned procedures.
  • the inner forming rollers are formed in a certain way, namely so that the envelope surfaces of the running surfaces of the inner forming rollers each define a Hüllkegelstumpf.
  • the associated cones each have conical tips.
  • all these tips are located on the axes of rotation of the inner forming rollers.
  • the inner forming rollers are arranged so that their roller rotation axes all intersect at a point on the axis of rotation of the workpiece, and also the points defined by the conical tips fall on this common point of intersection.
  • the inner mandrel can be driven with the workpiece around the workpiece axis.
  • the inner and / or outer forming rollers can be driven to rotate.
  • the same geometry with the common intersection as described for the inner forming rollers can alternatively or be provided in addition to the outer forming rollers.
  • the yield stress in the forming area in the walls of the workpiece is increased by inner and outer forming units on a driven workpiece, in which the inner rollers and the adjacent outer rollers have a minimal tangential distance to each other and thus maximizing the Allow forming rollers on the circumference of the contact diameter on the workpiece.
  • This can also be achieved by means of driven inner and outer forming units on a stationary workpiece.
  • FIGS. 3 to 5 a first embodiment of the invention is shown.
  • the outer forming unit is in this embodiment by the in the FIGS. 1 and 2 realized outer forming rollers 2 realized.
  • an internal forming unit shown in the Figures 5 and 6 , instead of in FIG. 1 used shown simple inner mandrel 3.
  • This inner forming unit creates by pressing inner forming rollers to the inside of the workpiece 9, a further pressure region 8, which extends from the inside of the workpiece 9 radially outward. This is in FIG. 4 shown. Because of the two-sided forming units, two pressure regions 7, 8 are formed, which overlap and thus considerably increase the existing reduction possibility of the wall thickness 10 or a higher strength of the wall Allow material to be formed while maintaining a constant wall thickness reduction.
  • this inner forming unit has a plurality of tapered rollers arranged tangentially to the workpiece 9, which are mounted as forming rollers 11, in particular in a cage 12, 13, and can be positioned tangentially and axially relative to the workpiece 9.
  • the cage is held together with screws 14 and is axially adjustable.
  • the forming rollers 11 are supported on a, in particular conical, inner mandrel 16, which is fastened to an extension section 17 whose diameter is smaller than the shaped or to be formed inner workpiece diameter 18th
  • the forming rollers 11 are thus held tangentially and axially, in particular by the cage 12, 13, and radially by the inner mandrel 16 in position. This arrangement ensures that the forming rollers do not fall out of the inner forming unit when the inner forming unit is outside the workpiece 9.
  • a maximum number of forming rollers with a minimum tangential distance from each other is possible, which exert a maximum possible forming force on the inner wall of the workpiece.
  • the forming rollers 11 By rolling the forming rollers 11 with the tapered outer side (conical outer side means that at least the envelope surface of the inner or outer forming rollers is truncated cone or conical) on the outside 19 of the êtdorns 16, a conical outer envelope surface 20, the largest diameter of the moldable inner diameter 18 of the workpiece 9 is determined.
  • the tapered outer side conical outer side means that at least the envelope surface of the inner or outer forming rollers is truncated cone or conical
  • the center lines of the centers of the conical shaping rollers 11 intersect with the tips of the shroud cones of all tapered forming rollers 11 in a point 21 which lies on the workpiece axis or the axis of rotation 22 of the workpiece 9.
  • the radial adjustability of the forming rollers to a diameter is possible, in which the center lines 24 and the ends of the shroud 20 of the forming rollers 11 intersect with the axis of rotation 22 of the workpiece 9 at a point 21 and thus speed wise are coordinated.
  • the larger diameter of the conical enveloping body 20 then forms the inner diameter 18 of the shaped workpiece 9.
  • an inner centering unit 23 for the workpiece area to be formed and another inner centering unit (not shown) for the shaped workpiece area can be provided. Both centering units are independently rotatably mounted in the center of the axis of rotation 22, so that they can be pushed with a minimum amount of friction through the workpiece 9 during the forming.
  • the schwumformiki can also be used without respectumformiki.
  • an outer sheath (not shown) must be mounted, which is axially and tangentially driven by the flowing material, so that only minimal friction between the material and the inner wall of the outer shell is formed.
  • a modified outer forming unit can be provided, as shown in FIGS FIGS. 6 to 8 is shown.
  • the mecanicumformiser shown there corresponds to the embodiment described above.
  • the outer forming unit shown has a plurality of tangentially arranged to the workpiece tapered rollers, which are provided as forming rollers 24 in the example shown in a cage 25, 26, the left and right cage part with screws 27 are connected to each other and can be axially adjustable.
  • the arrangement, shape and orientation of the outer forming rollers 24 is quite similar to that of the inner forming rollers 11 described above.
  • a raceway 28 To support the outer race of the forming rollers 24 is a raceway 28, with inner race 29 to the forming rollers 24 which is mounted in an outer housing 30, respectively.
  • the outer forming rollers 24 are thus tangential and axially held by a cage 25, 26, and radially by the outer race 28 in position.
  • the forming rollers 24 form with their inner raceway a conical enveloping body 31 whose angle to the axis of rotation 32 of the workpiece 33 corresponds to the inlet angle of a forming roller 24.
  • the radial adjustability of the forming rollers 24 is possible to a diameter at which the center lines 34 and the ends of the enveloping body 31 of the tapered rollers 24 intersect with the axis of rotation of the workpiece 33 at a point 35 and thus are matched in terms of speed.
  • the small diameter of the frusto-conical enveloping body of the forming rollers 24 then forms the outside diameter of the shaped workpiece. At the same time prevents the cage assembly falling out of the forming rollers when no workpiece 33 is located inside the outer forming unit.
  • All forming rollers together form within the cage 25, 26 a conical enveloping body 31 whose angle to the axis of rotation 22 of the workpiece 33 form the angle of entry of the forming rollers 24 for forming the workpiece 33.
  • the forming rollers are preferably surrounded by a lubricating coolant fluid, which is supplied through the coolant connection 36.
  • a similar forming process with the forming unit described above is possible when the outer race 28 is tangentially and axially driven and the workpiece 33 is fixed or when the outer race 28 is driven only tangentially and the workpiece 33 is tangential fixed and moved axially.
  • each of the two types of outer forming units requires an inner mandrel 3 for receiving the workpiece on which the workpiece is centered.
  • the design of the inner mandrel can have a significant impact on the friction be taken between the workpiece and flowing material.
  • an internal mandrel driven by the material flow or an inner roller minimal friction losses between the material and the internal mandrel can be achieved.
  • an inner forming unit in combination with an inner mandrel and to arrange one or more outer forming units on the circumference of the workpiece, wherein an outer forming unit with the inner forming unit axially deforms in the same workpiece cross section and at the same time another contemplatumformiki in the region êtdorns in another place the workpiece transforms.

Description

Die Erfindung betrifft ein Verfahren zum Umformen von Werkstücken nach dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zum Umformen von Werkstücken nach Anspruch 5 (siehe z.B. US 2010/0236122 ).The invention relates to a method for forming workpieces according to the preamble of claim 1 and a device for forming workpieces according to claim 5 (see, for example US 2010/0236122 ).

Es sind Verfahren bekannt, wie sie in den Figuren 1 (Querschnittansicht) und 2 (Längsschnittansicht) schematisch dargestellt sind, bei denen ein Werkstück 4 in Rotation in einer Drehrichtung 6 versetzt wird und anschließend durch von außen an das Werkstück herangeführte, in einem Lagergehäuse 1 gelagerte Walzen oder Rollen 2 unter relativer Verschiebung vom Werkstück 4 in einer axialen Vorschubrichtung 5 gegenüber den Umformrollen 2 umgeformt wird. In den meisten Fällen geschieht diese Umformung in der Weise, dass die äußeren Umformrollen 2 den Werkstoff des Werkstücks 4 im Bereich der Umformung gegen einen Innendorn 3 pressen, so dass der Werkstoff partiell axial, radial und tangential in einen Fließzustand versetzt wird und dies zu einer Reduzierung der Wanddicke des Werkstücks 4 führt, wobei sich die zu erzielende reduzierte Wanddicke durch den Abstand zwischen Umformrolle 2 und Innendorn 3 ergibt.There are known methods, as in the FIGS. 1 (Cross-sectional view) and 2 (longitudinal sectional view) are shown schematically, in which a workpiece 4 is set in rotation in a rotational direction 6 and then by externally brought to the workpiece, mounted in a bearing housing 1 rollers or rollers 2 under relative displacement of the workpiece. 4 is deformed in an axial feed direction 5 relative to the forming rollers 2. In most cases, this deformation takes place in such a way that the outer forming rollers 2 press the material of the workpiece 4 in the region of deformation against an inner mandrel 3, so that the material is partially axially, radially and tangentially placed in a flow state and this to a Reduction of the wall thickness of the workpiece 4 leads, with the resulting reduced wall thickness results from the distance between the forming roller 2 and inner mandrel 3.

Dabei wird die mögliche Reduktion der Wanddicke des Werkstücks 4 durch die Größe der Wanddicke, der Festigkeit des Werkstoffes, der Reibung zwischen Innenwandung der Vorform 4 und dem Innendorn 3 sowie der möglichen Anzahl von Umformrollen 2 am Umfang des Werkstückes 4 begrenzt.The possible reduction of the wall thickness of the workpiece 4 is limited by the size of the wall thickness, the strength of the material, the friction between the inner wall of the preform 4 and the inner mandrel 3 and the possible number of forming rollers 2 on the circumference of the workpiece 4.

Die Ursache dieser Begrenzung liegt in

  1. i) der Größe der Kraft, die partiell durch die Umformrolle 2 in das Werkstück 4 gebracht werden kann und dort eine Fließspannung erzeugt,
  2. ii) der Festigkeit des Werkstoffes, die vom Umformverfahren nicht beeinflusst werden kann,
  3. iii) der Größe der Reibung zwischen Werkstück 4 und Innendorn 3, die durch die Verfahrensart vorgegeben ist,
  4. iv) der Anzahl der Umformrollen 2, die am Umfang des Werkstückes 4 eingesetzt werden können,
  5. v) den Abmessungen der Lagerung der Umformrollen 2, die wiederum von der Lebensdauer der Lagerung und deren Abmessung sowie der Größe der Umformrollen 2 bestimmt wird.
The cause of this limitation lies in
  1. i) the magnitude of the force that can be partially brought into the workpiece 4 by the forming roller 2 and generates a yield stress there,
  2. (ii) the strength of the material which can not be influenced by the forming process,
  3. iii) the size of the friction between the workpiece 4 and the inner mandrel 3, which is predetermined by the type of process,
  4. iv) the number of forming rollers 2, which can be used on the circumference of the workpiece 4,
  5. v) the dimensions of the storage of the forming rollers 2, which in turn is determined by the life of the storage and its size and the size of the forming rollers 2.

Außerdem reduziert sich die Wirkung der Druckkraft der Umformrollen 2 mit zunehmender umzuformender Wanddicke, so dass es ab einer bestimmten Wanddicke nicht mehr möglich ist, den Werkstoff im Druckbereich 7 (Wirkbereich) der Umformrollen 2 in einen Fließzustand zu bringen. Somit ist die Dicke der zu reduzierenden Wandungen mit den bekannten Drückwalzverfahren durch die fehlende Fließspannung im Werkstoff eingeschränkt.In addition, the effect of the compressive force of the forming rollers 2 reduces with increasing wall thickness to be reshaped, so that it is no longer possible from a certain wall thickness to bring the material in the pressure range 7 (effective range) of the forming rollers 2 in a flow state. Thus, the thickness of the walls to be reduced with the known flow-forming process is limited by the lack of yield stress in the material.

Aufgabe der Erfindung ist es, ein Verfahren und eine Vorrichtung aufzuzeigen, bei denen die Formgebung von rotationssymmetrischen Werkstücken mit gleichbleibenden oder unterschiedlichen Wanddicken auch bei größeren Wanddicken möglich ist.The object of the invention is to provide a method and a device in which the shaping of rotationally symmetrical workpieces with constant or different wall thicknesses is possible even with larger wall thicknesses.

Gelöst wird diese Aufgabe durch ein Verfahren mit den Merkmalen des Anspruchs 1 und durch eine Vorrichtung mit den Merkmalen des Anspruchs 5. Vorteilhafte Ausführungsformen finden sich in den abhängigen Ansprüchen.This object is achieved by a method having the features of claim 1 and by an apparatus having the features of claim 5. Advantageous embodiments can be found in the dependent claims.

Erfindungsgemäß ist vorgesehen, dass der Innendurchmesser des Werkstücks durch Andrücken von inneren Umformrollen einer Innenumformeinheit erweitert wird oder/und der Außendurchmesser durch Andrücken der äußeren Umformrollen reduziert wird; insbesondere kann auch bei den genannten Vorgehensweisen der Innendorn durch die Innenumformeinheit verschoben werden. Durch das beschriebene Andrücken kann Druck sowohl von außen als auch von innen auf die Wand des Werkstücks ausgeübt und auch bei dickeren Wänden die Fließfähigkeit sichergestellt werden. Die inneren Umformrollen sind dabei auf bestimmte Art und Weise ausgebildet, nämlich so, dass die Hüllflächen der Laufflächen der inneren Umformrollen jeweils einen Hüllkegelstumpf definieren. Die zugehörigen Kegel weisen jeweils Kegelspitzen auf. Erfindungsgemäß liegen alle diese Spitzen auf den Drehachsen der inneren Umformrollen. Ferner sind die inneren Umformrollen so angeordnet, dass sich ihre Rollendrehachsen alle in einem Punkt auf der Drehachse des Werkstücks schneiden, wobei auch die durch die Kegelspitzen definierten Punkte auf diesen gemeinsamen Schnittpunkt fallen. Dabei kann der Innendorn mit dem Werkstück um die Werkstückachse angetrieben werden. Alternativ können auch die inneren und/oder äußeren Umformrollen drehend angetrieben werden. Dieselbe Geometrie mit dem gemeinsamen Schnittpunkt wie für die inneren Umformrollen beschrieben, kann alternativ oder ergänzend auch für die äußeren Umformrollen vorgesehen sein.According to the invention, the inner diameter of the workpiece is widened by pressing inner forming rollers of an inner forming unit and / or the outer diameter is reduced by pressing the outer forming rollers; In particular, the inner mandrel can also be displaced by the inner forming unit in the above-mentioned procedures. By the described pressing pressure can be exerted on the wall of the workpiece both from the outside and from the inside and the flowability can be ensured even with thicker walls. The inner forming rollers are formed in a certain way, namely so that the envelope surfaces of the running surfaces of the inner forming rollers each define a Hüllkegelstumpf. The associated cones each have conical tips. According to the invention, all these tips are located on the axes of rotation of the inner forming rollers. Furthermore, the inner forming rollers are arranged so that their roller rotation axes all intersect at a point on the axis of rotation of the workpiece, and also the points defined by the conical tips fall on this common point of intersection. In this case, the inner mandrel can be driven with the workpiece around the workpiece axis. Alternatively, the inner and / or outer forming rollers can be driven to rotate. The same geometry with the common intersection as described for the inner forming rollers can alternatively or be provided in addition to the outer forming rollers.

Durch das erfindungsgemäße Verfahren wird erreicht, dass die Fließspannung im Umformbereich in den Wänden des Werkstücks erhöht wird durch Innen- und Außenumformeinheiten an einem angetriebenen Werkstück, bei denen die inneren Rollen und die benachbarten äußeren Rollen einen minimalen tangentialen Abstand zueinander haben und so eine Maximierung der Umformrollen am Umfang des Kontaktdurchmessers am Werkstück zulassen. Dies kann auch erreicht werden durch angetriebene Innen- und Außenumformeinheiten an einem feststehendem Werkstück.By the method according to the invention it is achieved that the yield stress in the forming area in the walls of the workpiece is increased by inner and outer forming units on a driven workpiece, in which the inner rollers and the adjacent outer rollers have a minimal tangential distance to each other and thus maximizing the Allow forming rollers on the circumference of the contact diameter on the workpiece. This can also be achieved by means of driven inner and outer forming units on a stationary workpiece.

Die Erfindung wird nachfolgend anhand der Figuren 1 bis 8 näher erläutert.

Figur 1 -
zeigt eine schematische Längsschnittansicht einer Vorrichtung nach dem Stand der Technik,
Figur 2 -
zeigt eine schematische Querschnittansicht zur Verdeutlichung der Wirkbereiche der Umformrollen bei einer Vorrichtung nach dem Stand der Technik,
Figur 3 -
zeigt eine Längsschnittansicht eines Teils einer Vorrichtung nach einer ersten erfindungsgemäßen Ausführungsform,
Figur 4 -
zeigt eine Querschnittansicht des in Figur 3 gezeigten Vorrichtungsteils in der Schnittebene A-A,
Figur 5 -
zeigt eine Längsschnittansicht des Innendorns mit inneren Umformrollen,
Figur 6 -
zeigt eine Längsschnittansicht eines Teils einer Vorrichtung nach einer zweiten erfindungsgemäßen Ausführungsform,
Figur 7 -
zeigt eine Querschnittansicht des in Figur 6 gezeigten Vorrichtungsteils in der Schnittebene B-B,
Figur 8 -
zeigt eine schematische Querschnittansicht zur Verdeutlichung der Wirkbereiche der Umformrollen bei einer erfindungsgemäßen Vorrichtung.
The invention will be described below with reference to FIGS. 1 to 8 explained in more detail.
FIG. 1 -
shows a schematic longitudinal sectional view of a device according to the prior art,
FIG. 2 -
shows a schematic cross-sectional view to illustrate the effective ranges of the forming rollers in a device according to the prior art,
FIG. 3 -
shows a longitudinal sectional view of a part of a device according to a first embodiment of the invention,
FIG. 4 -
shows a cross-sectional view of the in FIG. 3 shown device part in the sectional plane AA,
FIG. 5 -
shows a longitudinal sectional view of the inner mandrel with inner forming rollers,
FIG. 6 -
shows a longitudinal sectional view of a part of a device according to a second embodiment of the invention,
FIG. 7 -
shows a cross-sectional view of the in FIG. 6 shown device part in the sectional plane BB,
FIG. 8 -
shows a schematic cross-sectional view to illustrate the effective ranges of the forming rollers in a device according to the invention.

In den Figuren 3 bis 5 ist eine erste erfindungsgemäße Ausführungform gezeigt. Die Außenumformeinheit wird in diesem Ausführungsbeispiel durch die auch in den Figuren 1 und 2 dargestellten äußeren Umformrollen 2 realisiert. Um den Druckbereich 7 (vgl. Fig. 4) in der Tiefe der Werkstückwandung zu vergrößern, wird erfindungsgemäß eine Innenumformeinheit, gezeigt in den Figuren 5 und 6, anstelle des in Figur 1 gezeigten einfachen Innendornes 3 eingesetzt. Diese Innenumformeinheit schafft durch Andrücken von inneren Umformrollen an die Innenseite des Werkstücks 9 einen weiteren Druckbereich 8, der sich von der Innenseite des Werkstückes 9 radial nach außen erstreckt. Dies ist in Figur 4 gezeigt. Durch die beidseitigen Umformeinheiten entstehen dabei zwei Druckbereiche 7, 8, die sich überlappen und somit die vorhandene Reduktionmöglichkeit der Wanddicke 10 erheblich erhöhen oder eine höhere Festigkeit des umzuformenden Werkstoffes bei gleichbleibender Reduktion der Wanddicke zulassen.In the FIGS. 3 to 5 a first embodiment of the invention is shown. The outer forming unit is in this embodiment by the in the FIGS. 1 and 2 realized outer forming rollers 2 realized. To the printing area 7 (see. Fig. 4 ) to increase in the depth of the workpiece wall, according to the invention an internal forming unit, shown in the Figures 5 and 6 , instead of in FIG. 1 used shown simple inner mandrel 3. This inner forming unit creates by pressing inner forming rollers to the inside of the workpiece 9, a further pressure region 8, which extends from the inside of the workpiece 9 radially outward. This is in FIG. 4 shown. Because of the two-sided forming units, two pressure regions 7, 8 are formed, which overlap and thus considerably increase the existing reduction possibility of the wall thickness 10 or a higher strength of the wall Allow material to be formed while maintaining a constant wall thickness reduction.

Diese erfindungsgemäße Innenumformeinheit weist im gezeigten Beispiel eine Mehrzahl tangential zum Werkstück 9 angeordnete Kegelrollen, die als Umformrollen 11, insbesondere in einem Käfig 12, 13 gelagert, und bezogen auf das Werkstück 9 tangential und axial positioniert werden können. Der Käfig wird mit Schrauben 14 zusammengehalten und ist axial justierbar. Die Umformrollen 11 stützen sich auf einem, insbesondere kegeligen, Innendorn 16 ab, der an einem Verlängerungsabschnitt 17 befestigt ist, dessen Durchmesser kleiner ist als der geformte oder zu formende innere Werkstückdurchmesser 18.In the example shown, this inner forming unit according to the invention has a plurality of tapered rollers arranged tangentially to the workpiece 9, which are mounted as forming rollers 11, in particular in a cage 12, 13, and can be positioned tangentially and axially relative to the workpiece 9. The cage is held together with screws 14 and is axially adjustable. The forming rollers 11 are supported on a, in particular conical, inner mandrel 16, which is fastened to an extension section 17 whose diameter is smaller than the shaped or to be formed inner workpiece diameter 18th

Die Umformrollen 11 werden somit tangential und axial, insbesondere durch den Käfig 12, 13, und radial durch den Innendorn 16 in Position gehalten. Diese Anordnung stellt sicher, dass die Umformrollen nicht aus der Innenumformeinheit herausfallen, wenn die Innenumformeinheit sich außerhalb des Werkstückes 9 befindet. Durch Bauweise und Anordnung dieser Umformrollen 11 wird eine maximale Anzahl von Umformrollen mit minimalem tangentialem Abstand zueinander möglich, die eine maximal mögliche Umformkraft auf der Innenwandung des Werkstückes ausüben.The forming rollers 11 are thus held tangentially and axially, in particular by the cage 12, 13, and radially by the inner mandrel 16 in position. This arrangement ensures that the forming rollers do not fall out of the inner forming unit when the inner forming unit is outside the workpiece 9. By construction and arrangement of these forming rollers 11, a maximum number of forming rollers with a minimum tangential distance from each other is possible, which exert a maximum possible forming force on the inner wall of the workpiece.

Durch das Abwälzen der Umformrollen 11 mit der kegeligen Außenseite (kegelige Außenseite bedeutet, dass wenigstens die Hüllfläche der inneren oder äußeren Umformrollen kegelstumpf- oder kegelförmig ist) auf der Außenseite 19 des Innendorns 16, entsteht eine kegelige äußere Hüllfläche 20, deren größter Durchmesser den formbaren inneren Durchmesser 18 des Werkstücks 9 bestimmt.By rolling the forming rollers 11 with the tapered outer side (conical outer side means that at least the envelope surface of the inner or outer forming rollers is truncated cone or conical) on the outside 19 of the Innendorns 16, a conical outer envelope surface 20, the largest diameter of the moldable inner diameter 18 of the workpiece 9 is determined.

Die Mittellinien der Zentren der kegeligen Umformrollen 11 schneiden sich mit den Spitzen der Hüllkegel aller kegeligen Umformrollen 11 in einem Punkt 21, der auf der Werkstückachse bzw. der Drehachse 22 des Werkstücks 9 liegt. Durch eine axiale Verschiebbarkeit des Käfigs 12, 13 ist die radiale Justierbarkeit der Umformrollen auf einen Durchmesser möglich, bei dem sich die Mittellinien 24 und die Enden der Hüllkegel 20 der Umformrollen 11 mit der Drehachse 22 des Werkstücks 9 in einem Punkt 21 schneiden und somit geschwindigkeitsmäßig aufeinander abgestimmt sind. Bei der Umformung bildet dann der größere Durchmesser des kegeligen Hüllkörpers 20 den Innendurchmesser 18 des geformten Werkstückes 9.The center lines of the centers of the conical shaping rollers 11 intersect with the tips of the shroud cones of all tapered forming rollers 11 in a point 21 which lies on the workpiece axis or the axis of rotation 22 of the workpiece 9. By an axial displaceability of the cage 12, 13, the radial adjustability of the forming rollers to a diameter is possible, in which the center lines 24 and the ends of the shroud 20 of the forming rollers 11 intersect with the axis of rotation 22 of the workpiece 9 at a point 21 and thus speed wise are coordinated. During the forming, the larger diameter of the conical enveloping body 20 then forms the inner diameter 18 of the shaped workpiece 9.

Mit der Innenumformeinheit können eine Innenzentriereinheit 23 für den umzuformenden Werkstückbereich und eine weitere Innenzentriereinheit (nicht dargestellt) für den geformten Werkstückbereich vorgesehen werden. Beide Zentriereinheiten sind unabhängig voneinander im Zentrum der Drehachse 22 drehbar gelagert, so dass sie mit einem minimalen Reibungsaufwand durch das Werkstück 9 während der Umformung geschoben werden können.With the inner forming unit, an inner centering unit 23 for the workpiece area to be formed and another inner centering unit (not shown) for the shaped workpiece area can be provided. Both centering units are independently rotatably mounted in the center of the axis of rotation 22, so that they can be pushed with a minimum amount of friction through the workpiece 9 during the forming.

An einem Werkstück kann je Außenumformeinheit, Fig.3 Pos. 1, eine Innenumformeinheit eingesetzt werden. Dabei spielt es keine Rolle, ob das Werkstück angetrieben oder die Umformeinheiten angetrieben werden, weil die Wirkung auf das Umformverhalten gleich ist.On a workpiece can per outer Umformeinheit, Figure 3 Pos. 1, a Innenumformeinheit be used. It does not matter if the workpiece is driven or the forming units be driven, because the effect on the forming behavior is the same.

Die Innenumformeinheit kann auch ohne Außenumformeinheit eingesetzt werden. In diesem Fall muss im Bereich der Umformung ein Außenmantel (nicht dargestellt) angebracht werden, der axial und tangential vom fließenden Werkstoff angetrieben wird, damit nur eine minimale Reibung zwischen Werkstoff und Innenwandung des Außenmantels entsteht.The Innenumformeinheit can also be used without Außenumformeinheit. In this case, in the area of forming an outer sheath (not shown) must be mounted, which is axially and tangentially driven by the flowing material, so that only minimal friction between the material and the inner wall of the outer shell is formed.

Um die Anzahl der Druckbereiche in der Tiefe der Werkstückwandung weiter zu erhöhen, kann erfindungsgemäß eine modifizierte Außenumformeinheit vorgesehen sein, wie dies in den Figuren 6 bis 8 dargestellt ist. Die dort gezeigte Innenumformeinheit entspricht dabei dem zuvor beschriebenen Ausführungsbeispiel.In order to further increase the number of pressure areas in the depth of the workpiece wall, according to the invention a modified outer forming unit can be provided, as shown in FIGS FIGS. 6 to 8 is shown. The Innenumformeinheit shown there corresponds to the embodiment described above.

Die dargestellte Außenumformeinheit weist eine Mehrzahl tangential zum Werkstück angeordnete Kegelrollen auf, die als Umformrollen 24 im gezeigten Beispiel in einem Käfig 25, 26 vorgesehen sind, dessen linker und rechter Käfigteil mit Schrauben 27 miteinander verbunden sind und der axial justierbar sein kann. Die Anordnung, Form und Ausrichtung der äußeren Umformrollen 24 ist ganz ähnlich zu der der oben beschriebenen inneren Umformrollen 11.The outer forming unit shown has a plurality of tangentially arranged to the workpiece tapered rollers, which are provided as forming rollers 24 in the example shown in a cage 25, 26, the left and right cage part with screws 27 are connected to each other and can be axially adjustable. The arrangement, shape and orientation of the outer forming rollers 24 is quite similar to that of the inner forming rollers 11 described above.

Zur Abstützung der äußeren Laufbahn der Umformrollen 24 ist ein Laufring 28, mit innerer Lauffläche 29 zu den Umformrollen 24, der in einem äußeren Gehäuse 30 befestigt ist, angeordnet. Die äußeren Umformrollen 24 werden somit tangential und axial durch einen Käfig 25, 26, und radial durch den äußeren Laufring 28 in Position gehalten. Durch diese Anordnung bilden die Umformrollen 24 mit ihrer inneren Laufbahn einen kegeligen Hüllkörper 31, dessen Winkel zur Drehachse 32 des Werkstückes 33 dem Einlaufwinkel einer Umformrolle 24 entspricht.To support the outer race of the forming rollers 24 is a raceway 28, with inner race 29 to the forming rollers 24 which is mounted in an outer housing 30, respectively. The outer forming rollers 24 are thus tangential and axially held by a cage 25, 26, and radially by the outer race 28 in position. By this arrangement, the forming rollers 24 form with their inner raceway a conical enveloping body 31 whose angle to the axis of rotation 32 of the workpiece 33 corresponds to the inlet angle of a forming roller 24.

Durch eine axiale Verschiebbarkeit des axial zusammengeschraubten Käfigs 25, 26, ist die radiale Justierbarkeit der Umformrollen 24 auf einen Durchmesser möglich, bei dem sich die Mittellinien 34 und die Enden der Hüllkörper 31 der Kegelrollen 24 mit der Drehachse des Werkstücks 33 in einem Punkt 35 schneiden und somit geschwindigkeitsmäßig aufeinander abgestimmt sind. Bei der Umformung bildet dann der kleine Durchmesser des kegelstumpfförmigen Hüllkörpers der Umformrollen 24 den Außendurchmesser des geformten Werkstücks. Gleichzeitig verhindert die Käfiganordnung das Herausfallen der Umformrollen, wenn kein Werkstück 33 sich im Inneren der äußeren Umformeinheit befindet.By an axial displaceability of the axially zusammengeschraubtes cage 25, 26, the radial adjustability of the forming rollers 24 is possible to a diameter at which the center lines 34 and the ends of the enveloping body 31 of the tapered rollers 24 intersect with the axis of rotation of the workpiece 33 at a point 35 and thus are matched in terms of speed. During the forming, the small diameter of the frusto-conical enveloping body of the forming rollers 24 then forms the outside diameter of the shaped workpiece. At the same time prevents the cage assembly falling out of the forming rollers when no workpiece 33 is located inside the outer forming unit.

Durch diese Anordnung der äußeren Umformrollen 24 wird eine maximale Anzahl von Umformrollen mit minimalem tangentialen Abstand zueinander möglich, die eine maximal mögliche Umformkraft auf die Außenwandung des Werkstücks ausüben und durch das Abwälzen auf der kegeligen Innenseite 29 des äußeren Laufringes 28 abgestützt werden. Alle Umformrollen gemeinsam bilden innerhalb des Käfigs 25, 26 einen kegeligen Hüllkörper 31, dessen Winkel zur Drehachse 22 des Werkstücks 33 den Einlaufwinkel der Umformrollen 24 zur Umformung des Werkstücks 33 bilden. Sobald das sich drehende Werkstück 33 axial auf den inneren Hüllkörper 31 der Umformrollen 24 trifft, drehen sich diese und wälzen sich dabei auf der feststehenden, inneren kegeligen Laufbahn 29 des Außenringes 28 ab. Mit dem axialen Druck des Vorschubs in axialer Richtung und dem Drehmoment des Werkstücks 33 wird eine axiale, tangentiale und radiale Kraft erzeugt, die den Werkstoff in einen plastischen Zustand versetzt, so dass dieser fließt, wodurch der Umformprozess beginnt. Während der Umformung werden die Umformrollen bevorzugt durch eine schmierende Kühlmittelflüssigkeit umspült, die durch den Kühlmittelanschluss 36 zugeführt wird.By this arrangement, the outer forming rollers 24, a maximum number of forming rollers with a minimum tangential distance from each other possible, exerting a maximum possible forming force on the outer wall of the workpiece and are supported by the rolling on the conical inner surface 29 of the outer race 28. All forming rollers together form within the cage 25, 26 a conical enveloping body 31 whose angle to the axis of rotation 22 of the workpiece 33 form the angle of entry of the forming rollers 24 for forming the workpiece 33. Once the turning Work piece 33 axially meets the inner envelope body 31 of the forming rollers 24, they rotate and roll on the fixed, inner tapered track 29 of the outer ring 28 from. With the axial pressure of the feed in the axial direction and the torque of the workpiece 33, an axial, tangential and radial force is generated, which places the material in a plastic state, so that it flows, whereby the forming process begins. During the forming, the forming rollers are preferably surrounded by a lubricating coolant fluid, which is supplied through the coolant connection 36.

Ein ähnlicher Umformprozess mit der zuvor beschriebenen Umformeinheit ist möglich, wenn der äußere Laufring 28 tangential und axial angetrieben wird und das Werkstück 33 feststeht oder wenn der äußere Laufring 28 nur tangential angetrieben wird und das Werkstück 33 tangential feststeht und axial verfahren wird.A similar forming process with the forming unit described above is possible when the outer race 28 is tangentially and axially driven and the workpiece 33 is fixed or when the outer race 28 is driven only tangentially and the workpiece 33 is tangential fixed and moved axially.

Bei einem feststehenden Werkstück 33 besteht auch die Möglichkeit, an beiden Enden des Werkstücks 33 jeweils eine angetriebene Umformeinheit anzuordnen, um gleichzeitig an beiden Seiten einen unabhängigen Umformprozess mit jeweils eigenen Abmessungen zu starten.In the case of a stationary workpiece 33, it is also possible to arrange in each case a driven forming unit at both ends of the workpiece 33 in order to simultaneously start an independent forming process, each with its own dimensions, on both sides.

Wenn keine Innenumformeinrichtung vorhanden ist, ist für die zwei Arten von Außenumformeinheiten jeweils ein Innendorn 3 zur Aufnahme des Werkstücks erforderlich, auf dem das Werkstück zentriert umgeformt wird. Mit der Gestaltung des Innendorns kann ein erheblicher Einfluss auf die Reibung zwischen Werkstück und fließendem Werkstoff genommen werden. Mit einem vom Werkstofffluss angetrieben Innendorn oder einer Innenrolle können minimale Reibungsverluste zwischen Werkstoff und Innendorn erzielt werden.If there is no internal forming device, each of the two types of outer forming units requires an inner mandrel 3 for receiving the workpiece on which the workpiece is centered. With the design of the inner mandrel can have a significant impact on the friction be taken between the workpiece and flowing material. With an internal mandrel driven by the material flow or an inner roller, minimal friction losses between the material and the internal mandrel can be achieved.

Es besteht ferner die Möglichkeit, im Inneren des angetriebenen Werkstücks eine Innenumformeinheit in Kombination mit einem Innendorn anzuordnen und am Umfang des Werkstücks eine oder mehrere Außenumformeinheiten anzuordnen, wobei dann eine Außenumformeinheit mit der Innenumformeinheit axial im gleichen Werkstückquerschnitt umformt und gleichzeitig eine andere Außenumformeinheit im Bereich des Innendorns an einer anderen Stelle das Werkstück umformt.It is also possible, inside the driven workpiece, to arrange an inner forming unit in combination with an inner mandrel and to arrange one or more outer forming units on the circumference of the workpiece, wherein an outer forming unit with the inner forming unit axially deforms in the same workpiece cross section and at the same time another Außenumformeinheit in the region Innendorns in another place the workpiece transforms.

Claims (8)

  1. Method for producing workpieces, wherein a substantially rotationally symmetrical workpiece (4, 9 33) is tensioned with a workpiece axis (22) concentrically with an internal mandrel (3, 16) provided inside the workpiece (4, 9, 33), and is reformed by means of roller spinning through radial pressure from outer forming rollers (7), wherein for this the wall thickness of the workpiece (4) is reduced at least in sections,
    characterised in that
    the inner diameter (18, 41) of the workpiece (33) is widened by the contact pressure from the inner forming rollers (11) of an inner forming unit, wherein the inner forming rollers (11) are designed so that the enveloping faces of their running surfaces each define a truncated enveloping cone and the tips of the respective associated enveloping cones lie on the axes of rotation of the inner forming rollers, wherein the inner forming rollers (11) are further arranged so that their rolling rotational axes and the enveloping cones (20) all intersect in a point on the workpiece axis (22), wherein the inner mandrel (3, 16) is driven with the workpiece (4, 9, 33) about the workpiece axis (22) or the inner and/or outer forming rollers are driven in rotation, and/or that the outer diameter of the workpiece (33) through contact pressure from the outer forming rollers (24) of the outer forming unit is reduced, wherein the outer forming rollers (24) are designed so that the enveloping faces of their running surfaces each define a truncated enveloping cone and the tips of the respective associated enveloping cones (31) lie on the rotational axes (34) of the outer forming rollers (24), wherein the outer forming rollers (24) are further arranged so that their roller rotational axes (34) and the enveloping cones (31) all intersect in a point (21) on the workpiece axis (22).
  2. Method according to claim 1,
    characterised in that
    the outer diameter of the workpiece is reduced through the outer forming unit (24, 44) and at the same time the inner diameter is widened through the inner forming unit (7, 23) wherein the forming units are positioned so that the individual contact pressure regions of the outer forming rollers (24) are axially superimposed with the contact pressure regions of the inner forming rollers in the workpiece (33) in relation to the direction of the workpiece axis (22),
  3. Method according to claim 1 or 2,
    characterised in that
    the inner and outer forming units are each driven by their own drive axially and tangentially, in relation to the workpiece longitudinal axis (22) wherein the workpiece (33) is clamped stationary.
  4. Method according to one of claims 1 to 3,
    characterised in that
    at the same time a number of outer forming units reduce the outer diameter and a number of inner forming units expand the inner diameter.
  5. Device for producing workpieces, having an inner mandrel (3, 16) about which a substantially rotationally symmetrical workpiece (4, 9, 33) can be mounted concentrically with a workpiece axis (22), with an outer forming unit with outer forming rollers (7) which are designed to form the workpiece through radial contact pressure of the outer forming rollers (7) with a reduction at least in some sections of the wall thickness of the workpiece (4, 9, 33),
    characterised in that
    to expand the inner diameter (18, 41) of the workpiece (33) an inner forming unit is provided with inner forming rollers (11), wherein the inner forming rollers (11) are designed so that the enveloping faces of their running surfaces each define a truncated enveloping cone and the tips of each associated enveloping cone lie on the rotational axes of the inner forming rollers, wherein the inner forming rollers (11) are further arranged so that their roller rotational axes and the enveloping cones (20) all intersect in a point (21) on the workpiece axis (22) wherein the inner mandrel (3, 16) can be driven in rotation with the workpiece (4, 9, 33) about the workpiece axis (22) or the inner and/or outer forming rollers can be driven in rotation, and/or that the outer forming rollers (24) are designed so that the enveloping faces of their running surfaces each define a truncated enveloping cone and the tips of the respective associated enveloping cones (31) lie on the rotational axes (34) of the outer forming rollers (24), wherein the outer forming rollers (24) are further arranged so that their roller rotational axes (34) and the enveloping cones (31) all intersect in a point (35) on the workpiece axis (22).
  6. Device according to claim 5,
    characterised in that
    the forming rollers (24) have a plurality of profiles.
  7. Device according to one of claims 5 or 6,
    characterised in that
    the inner and outer forming units each have their own drive which is tangential and axial in relation to the workpiece axis (22).
  8. Device according to one of claims 5 to 7,
    characterised in that
    it has a plurality of outer forming units and a plurality of inner forming units.
EP12006680.8A 2012-09-22 2012-09-22 Method and device for forming workpieces by spinning Active EP2711103B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP12006680.8A EP2711103B1 (en) 2012-09-22 2012-09-22 Method and device for forming workpieces by spinning
ES12006680.8T ES2527395T3 (en) 2012-09-22 2012-09-22 Procedure and device for forming parts
PCT/EP2013/002824 WO2014044396A1 (en) 2012-09-22 2013-09-19 Method and device for roll-forming workpieces
MX2014014793A MX2014014793A (en) 2012-09-22 2013-09-19 Method and device for roll-forming workpieces.
US14/384,845 US9662695B2 (en) 2012-09-22 2013-09-19 Method and device for roll-forming workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12006680.8A EP2711103B1 (en) 2012-09-22 2012-09-22 Method and device for forming workpieces by spinning

Publications (2)

Publication Number Publication Date
EP2711103A1 EP2711103A1 (en) 2014-03-26
EP2711103B1 true EP2711103B1 (en) 2014-10-15

Family

ID=47008242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12006680.8A Active EP2711103B1 (en) 2012-09-22 2012-09-22 Method and device for forming workpieces by spinning

Country Status (5)

Country Link
US (1) US9662695B2 (en)
EP (1) EP2711103B1 (en)
ES (1) ES2527395T3 (en)
MX (1) MX2014014793A (en)
WO (1) WO2014044396A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3025802B1 (en) * 2014-11-28 2021-05-12 REPKON Machine and Tool Industry and Trade Inc. Device and method for pressure rolling workpieces
CN106040815A (en) * 2016-06-22 2016-10-26 宁波五谷金属制品有限公司 Stretching device and manufacturing method of narrow-neck container

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545506A1 (en) * 1985-12-20 1987-07-02 Man Technologie Gmbh TOOL FOR ROLLING HOLLOW CYLINDRICAL WORKPIECES
DE4140948C2 (en) * 1991-12-12 1993-11-11 Schwager Aribert Prof Dr Ing H Process for the production of tubular parts
US20100236122A1 (en) * 2006-07-26 2010-09-23 Fonte Matthew V Flowforming Gun Barrels and Similar Tubular Devices
JP5435190B2 (en) * 2007-03-30 2014-03-05 日立オートモティブシステムズ株式会社 Tube processing method and cylinder device manufacturing method
PL2210682T3 (en) * 2009-07-09 2012-07-31 Leifeld Metal Spinning Ag Method and apparatus for spinning

Also Published As

Publication number Publication date
WO2014044396A1 (en) 2014-03-27
US20150027190A1 (en) 2015-01-29
ES2527395T3 (en) 2015-01-23
MX2014014793A (en) 2015-02-24
US9662695B2 (en) 2017-05-30
EP2711103A1 (en) 2014-03-26

Similar Documents

Publication Publication Date Title
EP2127777B1 (en) Device and method for generating or processing workpieces from a blank mould, in particular for casting internal profiles or internal gears
DE19861391B4 (en) A method of forming a hub disc and spinning roller for use in forming a hub disc
EP1108483B1 (en) Method and device for flow-turning
DE19830817B4 (en) Method for forming a workpiece by spin forming
DE3514316C2 (en)
EP1909990B1 (en) Method and device for producing metal rings
WO2011015184A1 (en) Method for producing a flanged disk for a spherical roller bearing and spherical roller bearing having a flanged disk produced according to the method
EP0955110B1 (en) Method and device for flow-turning
EP2711103B1 (en) Method and device for forming workpieces by spinning
DE102006011021B4 (en) Apparatus and method for producing a hub having a shaped body
DE1552188A1 (en) Method and device for profiling a solid cylindrical workpiece
DE2533484A1 (en) ROLLING MACHINE FOR ROLLING RING-SHAPED WORKPIECES
EP3025802B1 (en) Device and method for pressure rolling workpieces
DE19516595C2 (en) Hole rolling process and hole rolling device for seamless steel pipes
DE19915027A1 (en) Forming gear element for starter motor, and resultant gear element, with successively diminishing wall thickness of element obtained by combined radial and axial motion of at least one adjustable roll of pressure rolling machine
EP0997210B1 (en) Method of manufacturing of disc-shaped objects with hub and pressure roll for realising this method
DE19849981C5 (en) Method for forming a disc-shaped part with hub and spinning roller for the process
EP1468754A2 (en) Device for holding at least one roll in a rolling machine
EP1461169B9 (en) Device for bending profiles
EP1790423B1 (en) Holding device for the at least two rollers of a rolling machine and rolling machine
DE10047310A1 (en) Method and device for forming a flange or flange at the end of a tube made of sheet metal
DE102010047868B4 (en) Method and device for producing a hollow block from a block
DE102012212717A1 (en) Roller assembly for use as bending tool for roller bending device for bending e.g. ring bending parts, has holders comprising bearing projections positioned between bending rolls, and axles or shafts supported between bending rollers
DE102021127200B3 (en) Method and flow-forming machine for producing a flow-formed hollow shaft
DE4431500C2 (en) Method for producing a rotationally symmetrical workpiece made of metal by pressing and device for carrying out the method

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: 20130516

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL 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 RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20140523

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

RBV Designated contracting states (corrected)

Designated state(s): AL 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 RS SE SI SK SM TR

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL 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 RS SE SI SK SM 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: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 691393

Country of ref document: AT

Kind code of ref document: T

Effective date: 20141115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502012001409

Country of ref document: DE

Effective date: 20141120

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2527395

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20150123

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20141015

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: 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: 20141015

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

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: 20150215

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: 20141015

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: 20141015

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: 20150216

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: 20150115

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: 20141015

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: 20141015

Ref country code: SE

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: 20141015

Ref country code: RS

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: 20141015

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: 20141015

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: 20150116

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: 20141015

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502012001409

Country of ref document: DE

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: 20141015

Ref country code: CZ

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: 20141015

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: 20141015

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: 20141015

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: 20141015

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

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

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: 20141015

26N No opposition filed

Effective date: 20150716

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

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: 20141015

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: 20150922

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: 20141015

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

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160531

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

Ref country code: IE

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

Effective date: 20150922

Ref country code: CH

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

Effective date: 20150930

Ref country code: LI

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

Effective date: 20150930

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: 20150930

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

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: 20141015

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

Effective date: 20160922

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

Ref country code: SM

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: 20141015

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: 20141015

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: 20120922

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

Ref country code: BE

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

Effective date: 20150930

Ref country code: GB

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

Effective date: 20160922

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: 20141015

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

Ref country code: AL

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: 20141015

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 691393

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170922

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

Ref country code: AT

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

Effective date: 20170922

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230519

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

Ref country code: TR

Payment date: 20230914

Year of fee payment: 12

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

Ref country code: DE

Payment date: 20230825

Year of fee payment: 12

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

Ref country code: ES

Payment date: 20231019

Year of fee payment: 12