EP2205370B1 - Process and apparatus for producing a hollow body, and hollow body - Google Patents

Process and apparatus for producing a hollow body, and hollow body Download PDF

Info

Publication number
EP2205370B1
EP2205370B1 EP08838645A EP08838645A EP2205370B1 EP 2205370 B1 EP2205370 B1 EP 2205370B1 EP 08838645 A EP08838645 A EP 08838645A EP 08838645 A EP08838645 A EP 08838645A EP 2205370 B1 EP2205370 B1 EP 2205370B1
Authority
EP
European Patent Office
Prior art keywords
hollow body
die
cross
produced
sectional area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08838645A
Other languages
German (de)
French (fr)
Other versions
EP2205370A1 (en
Inventor
Thomas Flehmig
Jörg GORSCHLÜTER
Oliver Mertens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Publication of EP2205370A1 publication Critical patent/EP2205370A1/en
Application granted granted Critical
Publication of EP2205370B1 publication Critical patent/EP2205370B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the invention relates to a device for carrying out the method.
  • Hollow bodies are frequently required in motor vehicle construction and in pipeline construction, which have large cross-sectional shape changes in the axial direction in only a short axial length, for example from a small cross section to a large cross section.
  • the shape transition between the different cross-sectional shapes having axial sections of these hollow body therefore extends substantially in a radial plane.
  • an exhaust system of a motor vehicle can be considered, which has a correspondingly executed hollow body in the region of the muffler.
  • Other hollow bodies are for example support ends of a frame structure of a motor vehicle or fittings of piping systems. All of these hollow bodies are often produced by a plurality of interconnected, in particular welded, sheets, which have been formed into a corresponding hollow body.
  • the strength of the hollow body thus produced is due to the variety the welds but in need of improvement.
  • welds are susceptible to corrosion and increase the cost of manufacturing.
  • a variety of manufacturing methods are known to produce, for example, from a tubular body corresponding hollow body with strongly deposited shape transition.
  • the pressing of circular blanks or deep-drawn preforms also allows radially extending shape transitions.
  • these shape transitions can usually be made only at the pipe ends and lead to a strong thinning of the sheet thickness. The same applies to the hydroforming, which requires additional high investments in the field of tools.
  • a method according to the preamble of claim 1 is known from JP-A - 2006 00 2898 known.
  • the present invention seeks to provide a method and an apparatus for producing a generic hollow body available, which or which can be operated economically and with which or with which a high strength having hollow body with substantially in one Radial level extending shape transitions and almost constant sheet thickness can be produced.
  • the above-derived object is procedurally achieved by a method having the features of claim 1.
  • the sheet thickness decrease is minimal, since a mold flow of the mold transition or by the compression of the transition region of the preform body, a material flow is generated, which significantly reduces the sheet thickness decrease in highly deformed areas.
  • the thus produced hollow body with a substantially in a radial plane extending shape transition between two axial sections has a very homogeneous sheet thickness.
  • the hollow body can be carried out very economically due to the two-step process, namely the production of the preform and the compression molding of the preform, on the other hand, the resulting hollow body in terms of stability has very good properties.
  • any shape transition is considered, which has a maximum deviation of +/- 20 ° to the perpendicular to the axial direction.
  • the shape transition which essentially runs in a radial plane, takes place between axial sections of the hollow body having different cross-sectional areas, ie axial sections with a small cross-section and / or between different cross-sectional shapes, such as axial and polygonal axial sections of the hollow body.
  • the axial lengths of the axial sections of the hollow body to be produced with different cross-sectional areas may have different lengths, preferably a division of for example, 1/3 to 2/3, wherein 1/3 of the length refers to larger cross-sectional areas.
  • the known methods it has hitherto often only been possible to introduce radially extending shape transitions, for example, into a tubular body in end regions.
  • the preform body is produced from at least one printed circuit board, for example using the rolling-in technique or by U-forming. Both methods, the Einrolltechnik and the UO-forming, have already been tested and allow an economical production of hollow bodies, which can be used as a preform.
  • the formed board is welded together in the edge area.
  • the preform bodies produced by these methods continue to have very good forming properties due to the material-sparing pre-processes.
  • the die upsetting In the second process step, the die upsetting, this also allows large degrees of deformation to be achieved.
  • the length of the transition region of the preform body is selected as a function of the wall thickness of the formed blank, the shape change in the shape transition and depending on the material such that the maximum change in sheet thickness in the axial direction of the hollow body, especially in the area of the shape transition, is ⁇ 15%.
  • the process reliability of the method according to the invention can be further increased and the change in sheet thickness controlled by the method according to the invention.
  • the method according to the invention is particularly advantageous if the preform body has the outer and inner shape of the hollow body to be produced in at least one axial section.
  • the upsetting is particularly simple, since the mandrel can be arranged in a simple manner displaceable in this axial section of the preform body.
  • preform tubular bodies are formed, so that in a simple way fittings or parts of exhaust systems or support ends of a frame structure of a motor vehicle are produced.
  • functional elements or secondary elements are introduced into the hollow body to be produced, so that it can be dispensed with the subsequent introduction of these elements.
  • the introduction of the functional elements and / or secondary molding elements in the die for the production of the preform or in the die for forming the shape transition of the mold transition as well as in the mandrel itself can be integrated.
  • Functional elements or secondary features may be, for example, stampings, holes or tabs in the lateral surface of the hollow body. Other functional elements are also conceivable.
  • blanks of steel, of a steel alloy, in particular of high-strength steels are preferably used for producing the preform body.
  • the method according to the invention allows the use of high-strength steels, since no large degrees of deformation are required for producing the hollow body.
  • the preform body is made of "tailored blanks".
  • "Tailored blanks” are adapted to the particular application, for example, consisting of sheets with different thicknesses and / or material grades blanks.
  • a device in that a first die is provided for producing a preform body from a board using the rolling-in technique or the UO-forming process, wherein the first die is formed such that the preform body has at least one transition region extending in the axial direction of the hollow body to be produced, arranged between the first and the second axial section, and in the transition region the cross-sectional area of the preform body preferably continuously changes from the cross-sectional area of the first axial section to the cross-sectional area of the second axial section, and at least one second Die is provided for receiving the produced preform body with a forming mandrel, wherein the second die has the outer end shape of the hollow body, the forming mandrel, the inner end shape of the hollow to be produced body and the mandrel is axially displaceable relative to the second die.
  • the method according to the invention can be carried out in an economical manner, so that, with regard to the advantages of the device according to the invention, the advantages of the method according to the invention are pointed out becomes.
  • the necessary dies for the production of the preform and for molding of the hollow body in its final form require no high investment and thus contribute to the efficiency of the process.
  • first and / or the second die and / or the forming mandrel has means for introducing functional and / or secondary shaped elements into the hollow body. These do not have to be introduced by additional steps or devices.
  • a further advantageous embodiment of the device according to the invention provides that means for automatically transporting a board into the first die of the device and / or means for inserting the preform body in the second die and / or means for removing the hollow body from the second die are provided.
  • the compositions significantly improve the cycle times for producing the hollow body and, to that extent, lead to a particularly economical method of producing the hollow body.
  • the above object is achieved by a hollow body made of metal, which has at least a first axial section with a first cross-sectional area and a second axial section with a second cross-sectional area and wherein both axial sections of the hollow body over a substantially in a radial plane extending shape transition with each other are connected, thereby achieved that this is produced by the method according to the invention and the maximum change in sheet thickness, in particular in the region of the shape transition +/- 15%.
  • the inventive method allows a particularly gentle production of a hollow body with substantially in a radial plane shape transition between axial sections of different cross-sectional areas and thus allows particularly small changes in sheet thickness of the hollow body.
  • hollow body having radial shape transition can be made available by the hollow body made of steel, a steel alloy and / or high-strength steels.
  • "tailored blanks" can also be used to produce the hollow bodies, so that adaptation of the hollow body to the loads occurring in the application can be achieved with simultaneous weight optimization.
  • the use of high-strength steels results in the thus produced hollow bodies being adapted to high loads.
  • the preform body 1 is shown in a schematic, axial sectional view.
  • the preform body has a first axial section 2 with a first cross-sectional area and a second axial section 3 with a second cross-sectional area.
  • the cross-sectional area of the first axial section 2 is smaller than the cross-sectional area of the second axial section 3.
  • the shape transition in the axially extending transition region 4 is continuous or linear. But there are also other shape transitions conceivable.
  • preform body 1 shown preform body 1, for example, by the application Einrolltechnik or a UO-forming are produced.
  • the preform body, as well as the finished hollow body has a circular cross-section and is therefore particularly simple.
  • the shape transition can also take place between different cross-sectional shapes.
  • Fig. 2 now shows in a schematic, axial sectional view of an embodiment of a die for form upsetting the preform body 1 for carrying out the method according to the invention.
  • the die 5 has a die 6, which corresponds to the outer shape of the hollow body to be produced.
  • the preform body 1 is already inserted and the mandrel 7 is inserted into the preform body 1.
  • the mandrel 7 may additionally comprise, not shown means for introducing functional and / or secondary features in the hollow body. Other means, not shown, for introducing functional elements can also be provided in the die 5, but also in the forming mandrel 7.

Description

Die Erfindung betrifft ein Verfahren gemäβ dem Oberbegriff des Anspruchs 1. Darüber hinaus betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method according to the preamble of claim 1. In addition, the invention relates to a device for carrying out the method.

Im Kraftfahrzeugbau sowie im Rohrleitungsbau werden häufig Hohlkörper benötigt, welche in axialer Richtung große Querschnittsformänderungen in nur kurzer axialer Länge, beispielsweise von einem kleinen Querschnitt auf einen großen Querschnitt, aufweisen. Der Formübergang zwischen den unterschiedliche Querschnittsformen aufweisenden Axialabschnitte dieser Hohlkörper verläuft daher im Wesentlichen in einer Radialebene. Als ein typisches Beispiel kann eine Abgasanlage eines Kraftfahrzeuges angesehen werden, welche im Bereich des Schalldämpfers einen entsprechend ausgeführten Hohlkörper aufweist. Andere Hohlkörper sind beispielsweise Trägerenden einer Rahmenstruktur eines Kraftfahrzeugs oder Fittinge von Rohrleitungssystemen. All diese Hohlkörper werden häufig über mehrere miteinander verbundene, insbesondere verschweißte, Bleche hergestellt, welche zu einem entsprechenden Hohlkörper umgeformt wurden. Die Festigkeit der so hergestellten Hohlkörper ist aufgrund der Vielzahl der Schweißnähte jedoch verbesserungswürdig. Zudem sind Schweißnähte korrosionsanfällig und erhöhen den Aufwand zur Herstellung. Darüber hinaus sind eine Vielzahl von Herstellverfahren bekannt, um beispielsweise aus einem rohrförmigen Körper entsprechende Hohlkörper mit stark abgesetztem Formübergang herzustellen. Beispielsweise ermöglicht das Drücken von Blechronden oder tiefgezogenen Vorformkörpern ebenfalls radial verlaufende Formübergänge. Allerdings können diese Formübergänge zumeist nur an den Rohrenden hergestellt werden und führen zu einer starken Ausdünnung der Blechdicke. Gleiches gilt auch für das Innenhochdruckumformen, welches zusätzliche hohe Investitionen im Bereich der Werkzeuge erfordert. Die beispielsweise bekannte Einrolltechnik zur Herstellung von Hohlkörpern beliebigen Querschnitts aus Metall aus einer Platine ermöglicht nur die Herstellung von Formübergängen, welche über einen längeren Übergangsbereich axial verlaufen. Im Wesentlichen in einer Radialebene verlaufende Formübergänge sind durch die Verwendung der Einrolltechnik nicht herstellbar. Schließlich kann durch eine Warmumformung ein in einer Radialebene verlaufender Formübergang hergestellt werden. Allerdings ist auch dieses Verfahren, insbesondere aufgrund der notwendigen Erwärmung, kostenintensiv.Hollow bodies are frequently required in motor vehicle construction and in pipeline construction, which have large cross-sectional shape changes in the axial direction in only a short axial length, for example from a small cross section to a large cross section. The shape transition between the different cross-sectional shapes having axial sections of these hollow body therefore extends substantially in a radial plane. As a typical example, an exhaust system of a motor vehicle can be considered, which has a correspondingly executed hollow body in the region of the muffler. Other hollow bodies are for example support ends of a frame structure of a motor vehicle or fittings of piping systems. All of these hollow bodies are often produced by a plurality of interconnected, in particular welded, sheets, which have been formed into a corresponding hollow body. The strength of the hollow body thus produced is due to the variety the welds but in need of improvement. In addition, welds are susceptible to corrosion and increase the cost of manufacturing. In addition, a variety of manufacturing methods are known to produce, for example, from a tubular body corresponding hollow body with strongly deposited shape transition. For example, the pressing of circular blanks or deep-drawn preforms also allows radially extending shape transitions. However, these shape transitions can usually be made only at the pipe ends and lead to a strong thinning of the sheet thickness. The same applies to the hydroforming, which requires additional high investments in the field of tools. The example known Einrolltechnik for the production of hollow bodies of any cross-section of metal from a circuit board allows only the production of shape transitions, which extend axially over a longer transition region. Form transitions that essentially run in a radial plane can not be produced by using the rolling-in technique. Finally, by hot forming a running in a radial plane shape transition can be made. However, this method is also expensive, in particular due to the necessary heating.

Aus der veröffentlichten japanischen Patentanmeldung JP 2005279706 A ist darüber hinaus ein Verfahren zur Herstellung eines Hohlkörpers mit einem Formübergang bekannt, bei welchem durch einen in den Hohlkörper eingeführten Formstempel ein Axialabschnitt mit einer verringerten Querschnittsfläche aus einem Bereich mit größerer Querschnittsfläche gezogen wird. Einerseits wird bei dem Verfahren der Formübergang zwischen dem kleineren und größeren Querschnitt nicht beeinflusst, sondern vielmehr der kleinere Querschnittsbereich ausgezogen. Darüber hinaus ist die Blechdickenabnahme bei dem bekannten Verfahren relativ groß.From the published Japanese patent application JP 2005279706 A moreover, a method for producing a hollow body having a shape transition is known, in which an axial section with a reduced cross-sectional area is drawn from a region having a larger cross-sectional area by means of a shaping die inserted into the hollow body. On the one hand, in the process of shape transition between the smaller and larger cross-section is not affected, but rather pulled the smaller cross-sectional area. In addition, the sheet thickness decrease in the known method is relatively large.

Ein Verfahren gemäβ dem Oberbegriff des Anspruchs 1 ist aus der JP-A - 2006 00 2898 bekannt.A method according to the preamble of claim 1 is known from JP-A - 2006 00 2898 known.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Herstellung eines gattungsgemäßen Hohlkörpers zur Verfügung zu stellen, welches bzw. welche wirtschaftlich betrieben werden kann und mit welchem bzw. mit welcher eine hohe Festigkeit aufweisende Hohlkörper mit im Wesentlichen in einer Radialebene verlaufendem Formübergängen und nahezu gleich bleibender Blechdicke hergestellt werden können.On this basis, the present invention seeks to provide a method and an apparatus for producing a generic hollow body available, which or which can be operated economically and with which or with which a high strength having hollow body with substantially in one Radial level extending shape transitions and almost constant sheet thickness can be produced.

Gemäß einer ersten Lehre der vorliegenden Erfindung wird die oben hergeleitete Aufgabe verfahrensmäßig durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst.According to a first teaching of the present invention, the above-derived object is procedurally achieved by a method having the features of claim 1.

Es hat sich überraschenderweise gezeigt, dass bei dem erfindungsgemäßen Verfahren die Blechdickenabnahme minimal ist, da beim Formstauchen des Formübergangs bzw. durch die Stauchung des Übergangsbereich des Vorformkörpers ein Materialfluss erzeugt wird, welcher die Blechdickenabnahme in stark umgeformten Bereichen deutlich reduziert. Der so hergestellte Hohlkörper mit einem im Wesentlichen in einer Radialebene verlaufenden Formübergang zwischen zwei Axialabschnitten weist eine sehr homogene Blechdicke auf. Einerseits kann der Hohlkörper aufgrund des zwei Arbeitsschritte umfassenden Verfahrens, nämlich die Herstellung des Vorformkörpers und das Formstauchen des Vorformkörpers, sehr wirtschaftlich durchgeführt werden, andererseits weist der resultierende Hohlkörper in Bezug auf Stabilität sehr gute Eigenschaften auf. Als einer im Wesentlichen in einer Radialebene verlaufender Formübergang wird in der vorliegenden Patentanmeldung auch jeder Formübergang angesehen, welcher zur Senkrechten zur Axialrichtung eine Abweichung von maximal +/- 20° aufweist. Der im Wesentlichen in einer Radialebene verlaufende Formübergang erfolgt erfindungsgemäß zwischen unterschiedliche Querschnittsflächen aufweisenden Axialabschnitten des Hohlkörpers, also beispielsweise zwischen einem kleinen und einem großen Querschnitt aufweisenden Axialabschnitten und/oder zwischen unterschiedliche Querschnittsformen, wie beispielsweise kreisrund und vieleckig, aufweisenden Axialabschnitten des Hohlkörpers.It has surprisingly been found that in the method according to the invention, the sheet thickness decrease is minimal, since a mold flow of the mold transition or by the compression of the transition region of the preform body, a material flow is generated, which significantly reduces the sheet thickness decrease in highly deformed areas. The thus produced hollow body with a substantially in a radial plane extending shape transition between two axial sections has a very homogeneous sheet thickness. On the one hand, the hollow body can be carried out very economically due to the two-step process, namely the production of the preform and the compression molding of the preform, on the other hand, the resulting hollow body in terms of stability has very good properties. As a substantially continuous in a radial plane shape transition in the present patent application, any shape transition is considered, which has a maximum deviation of +/- 20 ° to the perpendicular to the axial direction. According to the invention, the shape transition, which essentially runs in a radial plane, takes place between axial sections of the hollow body having different cross-sectional areas, ie axial sections with a small cross-section and / or between different cross-sectional shapes, such as axial and polygonal axial sections of the hollow body.

Die axialen Längen der Axialabschnitte des herzustellenden Hohlkörpers mit unterschiedlichen Querschnittsflächen können unterschiedlich lang, bevorzugt eine Aufteilung von beispielsweise 1/3 zu 2/3 aufweisen, wobei 1/3 der Länge sich auf größere Querschnittsflächen bezieht. Mit den bekannten Verfahren war es bisher häufig nur möglich, in Endbereichen radial verlaufende Formübergänge beispielsweise in einen rohrförmigen Körper einzubringen. Um die Wirtschaftlichkeit des erfindungsgemäßen Verfahrens weiter zu steigern, ist erfindungsgemäβ vorgesehen, dass der Vorformkörper aus mindestens einer Platine beispielsweise unter Verwendung der Einrolltechnik oder durch ein U-O-Umformen hergestellt wird. Beide Verfahren, die Einrolltechnik sowie das U-O-Umformen, sind bereits erprobt und ermöglichen eine wirtschaftliche Herstellung von Hohlkörpern, welche als Vorformkörper verwendet werden können. Sowohl bei der Einrolltechnik als auch beim U-O-Umformen wird die umgeformte Platine im Kantenbereich miteinander verschweißt. Insbesondere weisen die mit diesen Verfahren hergestellten Vorformkörper aufgrund der materialschonenden Vorverfahren weiterhin sehr gute Umformeigenschaften auf. Im zweiten Verfahrensschritt, dem Formstauchen, können damit ebenfalls noch große Umformgrade erzielt werden.The axial lengths of the axial sections of the hollow body to be produced with different cross-sectional areas may have different lengths, preferably a division of for example, 1/3 to 2/3, wherein 1/3 of the length refers to larger cross-sectional areas. With the known methods, it has hitherto often only been possible to introduce radially extending shape transitions, for example, into a tubular body in end regions. In order to further increase the cost-effectiveness of the method according to the invention, it is provided according to the invention that the preform body is produced from at least one printed circuit board, for example using the rolling-in technique or by U-forming. Both methods, the Einrolltechnik and the UO-forming, have already been tested and allow an economical production of hollow bodies, which can be used as a preform. Both in the roll-in technique and in the UO-forming, the formed board is welded together in the edge area. In particular, the preform bodies produced by these methods continue to have very good forming properties due to the material-sparing pre-processes. In the second process step, the die upsetting, this also allows large degrees of deformation to be achieved.

Erfindungsgemäβ wird die Länge des Übergangsbereichs des Vorformkörpers abhängig von der Wanddicke der umgeformten Platine, der Formänderung im Formübergang und abhängig vom Werkstoff derart ausgewählt, dass die maximale Blechdickenänderung in axialer Richtung des Hohlkörpers, insbersondere im Bereich des Formübergangs, ±15% beträgt. Hierdurch kann die Prozesssicherheit des erfindungsgemäßen Verfahrens weiter gesteigert und die Blechdickenänderung durch das erfindungsgemäße Verfahren kontrolliert werden.According to the invention, the length of the transition region of the preform body is selected as a function of the wall thickness of the formed blank, the shape change in the shape transition and depending on the material such that the maximum change in sheet thickness in the axial direction of the hollow body, especially in the area of the shape transition, is ± 15%. As a result, the process reliability of the method according to the invention can be further increased and the change in sheet thickness controlled by the method according to the invention.

Besonders vorteilhaft ist das erfindungsgemäße Verfahren, wenn der Vorformkörper in mindestens einem Axialabschnitt die Außen- und Innenform des herzustellenden Hohlkörpers aufweist. Hierdurch gestaltet sich das Formstauchen besonders einfach, da der Formdorn auf einfache Weise in diesem Axialabschnitt des Vorformkörpers verschiebbar angeordnet werden kann. Vorzugsweise werden rohrförmige Vorformkörper umgeformt, so dass auf einfache Weise Fittinge oder Teile von Abgasanlagen oder Trägerenden einer Rahmenstruktur eines Kraftfahrzeuges hergestellt werden.The method according to the invention is particularly advantageous if the preform body has the outer and inner shape of the hollow body to be produced in at least one axial section. As a result, the upsetting is particularly simple, since the mandrel can be arranged in a simple manner displaceable in this axial section of the preform body. Preferably, preform tubular bodies are formed, so that in a simple way fittings or parts of exhaust systems or support ends of a frame structure of a motor vehicle are produced.

Gemäß einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens werden Funktionselemente oder Nebenformelemente in den herzustellenden Hohlkörper eingebracht, so dass auf das nachträgliche Einbringen dieser Elemente verzichtet werden kann. Vorzugsweise kann das Einbringen der Funktionselemente und/oder Nebenformelemente in dem Gesenk zur Herstellung des Vorformkörpers oder im Gesenk zum Formstauchen des Formübergangs wie auch im Formdorn selbst integriert werden. Funktionselemente bzw. Nebenformelemente können beispielsweise Verprägungen, Löcher oder Laschen in der Mantelfläche des Hohlkörpers sein. Andere Funktionselemente sind ebenso denkbar.According to a further embodiment of the method according to the invention functional elements or secondary elements are introduced into the hollow body to be produced, so that it can be dispensed with the subsequent introduction of these elements. Preferably, the introduction of the functional elements and / or secondary molding elements in the die for the production of the preform or in the die for forming the shape transition of the mold transition as well as in the mandrel itself can be integrated. Functional elements or secondary features may be, for example, stampings, holes or tabs in the lateral surface of the hollow body. Other functional elements are also conceivable.

Um die notwendige Festigkeit zur Verfügung zu stellen, werden vorzugsweise zur Herstellung des Vorformkörpers Platinen aus Stahl, einer Stahllegierung, insbesondere aus hochfesten Stählen verwendet. Insbesondere ermöglicht erst das erfindungsgemäße Verfahren den Einsatz von hochfesten Stählen, da insgesamt keine großen Umformgrade zur Herstellung des Hohlkörpers benötigt werden.In order to provide the necessary strength, blanks of steel, of a steel alloy, in particular of high-strength steels, are preferably used for producing the preform body. In particular, only the method according to the invention allows the use of high-strength steels, since no large degrees of deformation are required for producing the hollow body.

Um den Hohlkörper besser an den Anwendungsfall anzupassen, ist es vorteilhaft, dass der Vorformkörper aus "Tailored Blanks" hergestellt wird. "Tailored Blanks" sind auf den jeweiligen Anwendungsfall angepasste, beispielsweise aus Blechen mit unterschiedlichen Materialstärken und/oder Materialgüten bestehende Blechzuschnitte.In order to adapt the hollow body better to the application, it is advantageous that the preform body is made of "tailored blanks". "Tailored blanks" are adapted to the particular application, for example, consisting of sheets with different thicknesses and / or material grades blanks.

Gemäß einer zweiten Lehre der vorliegenden Erfindung wird die oben aufgezeigte Aufgabe durch eine Vorrichtung dadurch gelöst, dass ein erstes Gesenk zur Herstellung einer Vorformkörpers aus einer Platine unter Verwendung der Einrolltechnik oder des U-O-Umformverfahrens vorgesehen ist, wobei das erste Gesenk so ausgebildet ist, dass der Vorformkörper mindestens einen sich in Axialrichtung des herzustellenden Hohlkörpers erstreckenden, zwischen dem ersten und dem zweiten Axialabschnitt angeordneten Übergangsbereich aufweist und im Übergangsbereich sich die Querschnittsfläche des Vorformkörpers von der Querschnittsfläche des ersten Axialabschnitts in die Querschnittsfläche des zweiten Axialabschnitts vorzugsweise kontinuierlich ändert, und mindestens ein zweites Gesenk zur Aufnahme des hergestellten Vorformkörpers mit einem Formdorn vorgesehen ist, wobei das zweite Gesenk die äußere Endform des Hohlkörpers aufweist, der Formdorn die innere Endform des herzustellenden Hohlkörpers aufweist und der Formdorn relativ zum zweiten Gesenk axial verschiebbar ist.According to a second teaching of the present invention, the above-described object is achieved by a device in that a first die is provided for producing a preform body from a board using the rolling-in technique or the UO-forming process, wherein the first die is formed such that the preform body has at least one transition region extending in the axial direction of the hollow body to be produced, arranged between the first and the second axial section, and in the transition region the cross-sectional area of the preform body preferably continuously changes from the cross-sectional area of the first axial section to the cross-sectional area of the second axial section, and at least one second Die is provided for receiving the produced preform body with a forming mandrel, wherein the second die has the outer end shape of the hollow body, the forming mandrel, the inner end shape of the hollow to be produced body and the mandrel is axially displaceable relative to the second die.

Mit der erfindungsgemäßen Vorrichtung kann das erfindungsgemäße Verfahren auf wirtschaftliche Art und Weise durchgeführt werden, so dass im Hinblick auf die Vorteile der erfindungsgemäßen Vorrichtung auf die Vorteile des erfindungsgemäßen Verfahrens hingewiesen wird. Darüber hinaus erfordern die notwendigen Gesenke zur Herstellung des Vorformkörpers und zum Formstauchen des Hohlkörpers in seine endgültige Form keine hohen Investitionen und tragen insofern zur Wirtschaftlichkeit des Verfahrens bei.With the device according to the invention, the method according to the invention can be carried out in an economical manner, so that, with regard to the advantages of the device according to the invention, the advantages of the method according to the invention are pointed out becomes. In addition, the necessary dies for the production of the preform and for molding of the hollow body in its final form require no high investment and thus contribute to the efficiency of the process.

Weitere Arbeitsschritte können gemäß einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung dadurch vermieden werden, dass das erste und/oder das zweite Gesenk und/oder der Formdorn Mittel zur Einbringung von Funktions- und/oder Nebenformelementen in den Hohlkörper aufweist. Diese müssen dann nicht durch zusätzliche Arbeitsschritte oder Vorrichtungen eingebracht werden.Further working steps can be avoided according to a further embodiment of the device according to the invention in that the first and / or the second die and / or the forming mandrel has means for introducing functional and / or secondary shaped elements into the hollow body. These do not have to be introduced by additional steps or devices.

Eine weitere vorteilhafte Ausgestaltung der erfindungsgemäßen Vorrichtung sieht vor, dass Mittel zum automatischen Transport einer Platine in das erste Gesenk der Vorrichtung und/oder Mittel zum Einlegen des Vorformkörpers in das zweite Gesenk und/oder Mittel zur Entnahme des Hohlkörpers aus dem zweiten Gesenk vorgesehen sind. Die Mittel verbessern insbesondere die Zykluszeiten zur Herstellung des Hohlkörpers deutlich und führen insofern zu einer besonders wirtschaftlichen Herstellweise der Hohlkörper.A further advantageous embodiment of the device according to the invention provides that means for automatically transporting a board into the first die of the device and / or means for inserting the preform body in the second die and / or means for removing the hollow body from the second die are provided. In particular, the compositions significantly improve the cycle times for producing the hollow body and, to that extent, lead to a particularly economical method of producing the hollow body.

Gemäß einer dritten Lehre der vorliegenden Erfindung wird die oben aufgezeigte Aufgabe durch einen Hohlkörper aus Metall, welcher mindestens einen ersten Axialabschnitt mit einer ersten Querschnittsfläche und einen zweiten Axialabschnitt mit einer zweiten Querschnittsfläche aufweist und bei welchem beide Axialabschnitte des Hohlkörpers über einen im Wesentlichen in einer Radialebene verlaufenden Formübergang miteinander verbunden sind, dadurch gelöst, dass dieser mit dem erfindungsgemäßen Verfahren hergestellt wird und die maximale Blechdickenänderung, insbesondere im Bereich des Formübergangs +/- 15 % beträgt.According to a third teaching of the present invention, the above object is achieved by a hollow body made of metal, which has at least a first axial section with a first cross-sectional area and a second axial section with a second cross-sectional area and wherein both axial sections of the hollow body over a substantially in a radial plane extending shape transition with each other are connected, thereby achieved that this is produced by the method according to the invention and the maximum change in sheet thickness, in particular in the region of the shape transition +/- 15%.

Wie zuvor ausgeführt, ermöglicht das erfindungsgemäße Verfahren eine besonders schonende Herstellung eines Hohlkörpers mit im Wesentlichen in einer Radialebene Formübergang zwischen Axialabschnitten unterschiedlicher Querschnittsflächen und ermöglicht damit besonders geringe Blechdickenänderungen des Hohlkörpers.As stated above, the inventive method allows a particularly gentle production of a hollow body with substantially in a radial plane shape transition between axial sections of different cross-sectional areas and thus allows particularly small changes in sheet thickness of the hollow body.

Schließlich können besonders hohe Festigkeiten aufweisende Hohlkörper mit radialem Formübergang dadurch zur Verfügung gestellt werden, dass der Hohlkörper aus Stahl, einer Stahllegierung und/oder hochfesten Stählen besteht. Wie bereits zuvor ausgeführt, können durchaus auch "Tailored Blanks" zur Herstellung der Hohlkörper verwendet werden, so dass eine Anpassung des Hohlkörpers an die in der Anwendung auftretenden Belastungen bei gleichzeitiger Gewichtsoptimierung erzielt werden kann. Insbesondere die Verwendung von hochfesten Stählen führt dazu, dass die so herstellten Hohlkörper an hohe Belastungen angepasst sind.Finally, particularly high strength hollow body having radial shape transition can be made available by the hollow body made of steel, a steel alloy and / or high-strength steels. As stated previously, "tailored blanks" can also be used to produce the hollow bodies, so that adaptation of the hollow body to the loads occurring in the application can be achieved with simultaneous weight optimization. In particular, the use of high-strength steels results in the thus produced hollow bodies being adapted to high loads.

Es gibt nun eine Vielzahl von Möglichkeiten das erfindungsgemäße Verfahren, die Vorrichtung sowie den erfindungsgemäßen Hohlkörper auszugestalten und weiterzubilden. Hierzu wird einerseits verwiesen auf die den Patentansprüchen 1, 6 und 9 nachgeordneten Patentansprüche, andererseits auf die Beschreibung zweier Ausführungsbeispiele in Verbindung mit der Zeichnung. Die Zeichnung zeigt in

Fig. 1
in einer axialen Schnittansicht den Vorformkörper eines Ausführungsbeispiels eines erfindungsgemäß hergestellten Hohlkörpers,
Fig. 2
das zweite Gesenk zum Formstauchen des Vorformkörpers eines Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung vor dem Formstauchen des Vorformkörpers in einer schematischen Axialschnittansicht und
Fig. 3
das Gesenk aus Fig. 2 nach dem Formstauchen des Vorformkörpers in einer schematischen Axialschnittansicht.
Fig. 4
das erste und das zweite Gesenk
There are now a variety of ways to design the inventive method, the device and the hollow body according to the invention and further. For this purpose, on the one hand, reference is made to the patent claims 1, 6 and 9 subordinate claims, on the other hand to the description of two embodiments in conjunction with the drawings. The drawing shows in
Fig. 1
in an axial sectional view of the preform body of an embodiment of a hollow body according to the invention,
Fig. 2
the second die for form upsetting the preform body of an embodiment of a device according to the invention before the upsetting of the preform body in a schematic axial sectional view and
Fig. 3
the die out Fig. 2 after the form upsetting of the preform body in a schematic axial section view.
Fig. 4
the first and second dies

In Fig. 1 ist zunächst der Vorformkörper 1 in einer schematischen, axialen Schnittansicht dargestellt. Der Vorformkörper weist einen ersten Axialabschnitt 2 mit einer ersten Querschnittsfläche und einen zweiten Axialabschnitt 3 mit einer zweiten Querschnittsfläche auf. Die Querschnittsfläche des ersten Axialabschnitts 2 ist kleiner als die Querschnittsfläche des zweiten Axialabschnitts 3. Im sich in Axialrichtung erstreckenden Übergangsbereich 4, welcher zwischen beiden Axialabschnitten 2, 3 angeordnet ist, ändert sich die Querschnittsfläche des Axialabschnitts 2 auf die Querschnittsfläche des Axialabschnitts 3. Im dargestellten Ausführungsbeispiel ist der Formübergang in dem sich in axialer Richtung erstreckenden Übergangsbereich 4 kontinuierlich bzw. linear. Es sind aber auch andere Formübergänge denkbar. Der in Fig. 1 gezeigte Vorformkörper 1 kann beispielsweise durch die Anwendung der Einrolltechnik oder einer U-O-Umformung hergestellt werden. Vorliegend weist der Vorformkörper, wie auch der fertig gestellte Hohlkörper einen kreisförmigen Querschnitt auf und ist damit besonders einfach ausgebildet. Wie bereits ausgeführt, kann der Formübergang aber auch zwischen unterschiedlichen Querschnittsformen erfolgen.In Fig. 1 First, the preform body 1 is shown in a schematic, axial sectional view. The preform body has a first axial section 2 with a first cross-sectional area and a second axial section 3 with a second cross-sectional area. The cross-sectional area of the first axial section 2 is smaller than the cross-sectional area of the second axial section 3. In the axially extending transition region 4, which is arranged between both axial sections 2, 3, the cross-sectional area of the axial section 2 changes to the cross-sectional area of the axial section 3 Embodiment, the shape transition in the axially extending transition region 4 is continuous or linear. But there are also other shape transitions conceivable. The in Fig. 1 shown preform body 1, for example, by the application Einrolltechnik or a UO-forming are produced. In the present case, the preform body, as well as the finished hollow body has a circular cross-section and is therefore particularly simple. As already stated, however, the shape transition can also take place between different cross-sectional shapes.

Fig. 2 zeigt nun in einer schematischen, axialen Schnittansicht ein Ausführungsbeispiel eines Gesenks zum Formstauchen des Vorformkörpers 1 zur Durchführung des erfindungsgemäßen Verfahrens. Das Gesenk 5 weist eine Matrize 6 auf, welche der äußeren Formgebung des herzustellenden Hohlkörpers entspricht. Im Gesenk 5 der Fig. 2 ist der Vorformkörper 1 bereits eingelegt und der Formdorn 7 in den Vorformkörper 1 eingeführt. Der Formdorn 7 kann zusätzlich, nicht dargestellte Mittel zur Einbringung von Funktions- und/oder Nebenformelementen in den Hohlkörper aufweisen. Weitere nicht dargestellte Mittel zur Einbringung von Funktionselementen können auch im Gesenk 5, aber auch im Formdorn 7 vorgesehen sein. Der Formdorn 7 wird nun in Pfeilrichtung axial verschoben, so dass der Übergangsbereich 4 des Vorformkörpers 1 in den Formübergang 8 des Hohlkörpers gestaucht wird. Hierdurch wird erreicht, dass die Blechdickenänderung, trotz der Erzeugung des radial verlaufenden Formübergangs 8 moderat bleibt und insofern ein verbesserter Hohlkörper mit radialem Formübergang 8 zur Verfügung gestellt werden kann, Fig. 3. Fig. 2 now shows in a schematic, axial sectional view of an embodiment of a die for form upsetting the preform body 1 for carrying out the method according to the invention. The die 5 has a die 6, which corresponds to the outer shape of the hollow body to be produced. In the die 5 of Fig. 2 the preform body 1 is already inserted and the mandrel 7 is inserted into the preform body 1. The mandrel 7 may additionally comprise, not shown means for introducing functional and / or secondary features in the hollow body. Other means, not shown, for introducing functional elements can also be provided in the die 5, but also in the forming mandrel 7. The mandrel 7 is now axially displaced in the direction of the arrow, so that the transition region 4 of the preform body 1 is compressed in the transition shape 8 of the hollow body. This ensures that the change in sheet thickness, despite the generation of the radially extending transition shape 8 remains moderate and insofar an improved hollow body with radial shape transition 8 can be provided, Fig. 3 ,

Claims (10)

  1. Method for producing a hollow body made of metal, which comprises at least one first axial portion (2) with a first cross-sectional area and a second axial portion (3) with a second cross-sectional area and in which both axial portions (2, 3) of the hollow body are connected to one another by means of a shape transition running substantially in a radial plane (8), i.e. by means of a shape transition, which has a maximum deviation of +/-20° perpendicular to the axial direction,
    in which a preform body (1) is produced from one blank, which comprises at least one transition region (4) extending in the axial direction of the hollow body to be produced and is arranged between the first and the second axial portion (2, 3), wherein, in the transition region (4), the cross-sectional area of the preform body (1) preferably continuously changes from the cross-sectional area of the first axial portion (2) into the cross-sectional area of the second axial portion (3),
    the preform body (1) is accommodated in a die (5), wherein the die (5) has the final external shape of the hollow body to be produced,
    a shaping mandrel (7) is inserted into the preform body (1), wherein the shaping mandrel (7) has the internal shape of the hollow body to be produced,
    an axial movement of the shaping mandrel (7) upsets the preform body (1) in the die (5) into the final shape of the hollow body
    characterised in that the preform body (1) is produced from at least one blank for example using the rolling-in technique or by U-O forming and the length of the transition region (4) of the preform body (1) is selected as a function of the wall thickness of the formed blank, the change in shape in the shape transition and as a function of the material in such a manner that the maximum sheet thickness change in axial direction of the hollow body, in particular in the region of the shape transition (8), is +/- 15%.
  2. Method according to claim 1,
    characterised in that
    the preform body (1), in at least one axial portion (2, 3), has the external and internal shape of the hollow body to be produced.
  3. Method according to claim 1 or 2,
    characterised in that
    function elements and/or secondary shaped elements are incorporated into the hollow body to be produced.
  4. Method according to claims 1 to 3,
    characterised in that
    blanks made of steel, a steel alloy, in particular made of high-strength steels, are used for producing the preform body (1).
  5. Method according to claims 1 to 4,
    characterised in that
    the preform body (1) is produced from tailored blanks.
  6. Apparatus for producing a hollow body made of metal, which comprises at least one first axial portion (2) with a first cross-sectional area and a second axial portion (3) with a second cross-sectional area and in which both axial portions (2, 3) in the axial direction of the hollow body are connected to one another by means of a shape transition (8) running substantially in a radial plane, i.e. by means of a shape transition, which has a maximum deviation of +/-20° perpendicular to the axial direction, in particular for carrying out a method according to claims 1 to 5,
    characterised in that
    a first die (10) for producing a preform body (1) from a blank using the rolling-in technique or the U-O forming method is provided, wherein the first die (10) is configured so that the preform body (1) comprises at least one transition region (4) extending in the axial direction of the hollow body to be produced and arranged between the first and the second axial portion (2, 3) and, in the transition region (4), the cross-sectional area of the preform body (1) preferably continuously changes from the cross-sectional area of the first axial portion (2) into the cross-sectional area of the second axial portion (3), and at least one second die (5) for accommodating the preform body (1) that is produced is provided with a shaping mandrel (7), wherein the second die (5) has the external final shape of the hollow body, the shaping mandrel (7) has the internal final shape of the hollow body to be produced and the shaping mandrel (7) is axially slidable relative to the second die (5).
  7. Apparatus according to claim 6,
    characterised in that
    the first and/or the second die (10, 5) and/or the shaping mandrel (7) comprises means for incorporating function elements and/or secondary shaped elements into the hollow body.
  8. Apparatus according to claim 6 or 7,
    characterised in that
    means are provided for automatically transporting a blank into the first die (10) of the apparatus (9) and/or means for inserting the preform body into the second die and/or means for removing the hollow body from the second die.
  9. Hollow body made of metal, which comprises at least one first axial portion (2) with a first cross-sectional area and a second axial portion (3) with a second cross-sectional area and in which both axial portions (2, 3) of the hollow body are connected to one another by means of a shape transition running in a radial plane (8), produced with a method according to claim 1 to 5, in particular using an apparatus according to claim 6 or 8, wherein the maximum sheet thickness change in the axial direction of the hollow body, in particular in the region of the shape transition (8), is +/- 15%.
  10. Hollow body according to claim 9,
    characterised in that
    said hollow body consists of steel, a steel alloy and/or high-strength steels.
EP08838645A 2007-10-18 2008-10-17 Process and apparatus for producing a hollow body, and hollow body Not-in-force EP2205370B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007050337A DE102007050337B4 (en) 2007-10-18 2007-10-18 Molded hollow body
PCT/EP2008/064047 WO2009050270A1 (en) 2007-10-18 2008-10-17 Process and apparatus for producing a hollow body, and hollow body

Publications (2)

Publication Number Publication Date
EP2205370A1 EP2205370A1 (en) 2010-07-14
EP2205370B1 true EP2205370B1 (en) 2012-12-19

Family

ID=40297920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08838645A Not-in-force EP2205370B1 (en) 2007-10-18 2008-10-17 Process and apparatus for producing a hollow body, and hollow body

Country Status (5)

Country Link
US (1) US9283602B2 (en)
EP (1) EP2205370B1 (en)
DE (1) DE102007050337B4 (en)
ES (1) ES2401306T3 (en)
WO (1) WO2009050270A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016123265A1 (en) 2016-12-01 2018-06-07 Linde + Wiemann SE & Co. KG Method and semifinished product for producing an at least partially cured profile component

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1566645A (en) 1925-12-22 Alfred b
DE19827798A1 (en) * 1998-06-23 1999-12-30 Thyssenkrupp Stahl Ag Production of longitudinally welded pipes out of plane sheet metal blanks
MXPA05011842A (en) 2003-05-08 2006-05-25 Noble Metal Proc Inc Process for press forming metal tubes.
DE10329424B4 (en) 2003-07-01 2005-04-28 Thyssenkrupp Stahl Ag Method for producing a longitudinally slotted hollow profile with a plurality of longitudinal sections, which are different in cross-section, from a planar sheet metal blank
JP2005279706A (en) 2004-03-29 2005-10-13 Calsonic Kansei Corp Metal tube end diameter-reducing method and device therefor
JP2006002898A (en) 2004-06-18 2006-01-05 Calsonic Kansei Corp Pipe connection method and pipe connection structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016123265A1 (en) 2016-12-01 2018-06-07 Linde + Wiemann SE & Co. KG Method and semifinished product for producing an at least partially cured profile component
WO2018099744A1 (en) 2016-12-01 2018-06-07 Linde + Wiemann SE & Co. KG Method and semifinished product for producing an at least partially hardened profiled component

Also Published As

Publication number Publication date
DE102007050337B4 (en) 2009-12-31
US20100294014A1 (en) 2010-11-25
DE102007050337A1 (en) 2009-04-23
ES2401306T3 (en) 2013-04-18
US9283602B2 (en) 2016-03-15
EP2205370A1 (en) 2010-07-14
WO2009050270A1 (en) 2009-04-23

Similar Documents

Publication Publication Date Title
DE112006000619B4 (en) Method for producing a steering rack
EP2017121B1 (en) Support rod for headrest
EP2477765B1 (en) Method for manufacturing a control arm for a vehicle
DE102006025522B4 (en) Method and device for producing structured, closed hollow profiles
EP1954420B1 (en) Method and device for the coreless forming of hollow profiles
DE19614656A1 (en) Manufacture of increased wall thickness on hollow profile, for IC engine exhaust pipe
DE69915744T2 (en) Method for producing tubular components
DE102013112123B4 (en) Metal sleeve and method for its production
WO2012171875A1 (en) Method for producing slit hollow profiles
DE102007038713B4 (en) Process for the production of partially reinforced hollow profiles
EP2205371B1 (en) Method for producing pipe-in-pipe systems
EP2965830B1 (en) Method for producing a torsion profile from a tubular hollow profile
EP2205370B1 (en) Process and apparatus for producing a hollow body, and hollow body
WO2016119940A1 (en) Method and device for producing a collar on a workpiece
DE102006012625C5 (en) Method for producing profiles
DE102005060486B4 (en) Process for producing a heavy-duty composite part and a high-strength composite part produced thereon and use
DE102018110119B3 (en) Process and apparatus for producing an end product from an intermediate by means of forming
EP0997210A2 (en) Method of manufacturing of disc-shaped objects with hub and pressure roll for realising this method
EP2959985B1 (en) Profiled beam with increased flexural strength made of cold strip and method for producing same
EP2095890B1 (en) Method for shaping a hollow profile component with high internal pressure
DE3326170A1 (en) METAL RACK PART, METHOD FOR THE PRODUCTION THEREOF AND STEERING GEARBOX USING SUCH A RACK PART
DE102007010117A1 (en) Structural component of sheet-metal material and apparatus and method for joining a structural component of sheet-metal material
EP0892689B1 (en) Process for increasing the wall thickness in hollow sections
DE102013000920B4 (en) Component, in particular pull and / or push rod, and method for forming such a component
DE102013012586A1 (en) Component with continuous hollow cross-section and a method for its production

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: 20100415

AK Designated contracting states

Kind code of ref document: A1

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

AX Request for extension of the european patent

Extension state: AL BA MK RS

17Q First examination report despatched

Effective date: 20101103

DAX Request for extension of the european patent (deleted)
REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 502008008931

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: B21C0037080000

Ipc: B21D0022020000

GRAC Information related to communication of intention to grant a patent modified

Free format text: ORIGINAL CODE: EPIDOSCIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: B21C 37/08 20060101ALI20120320BHEP

Ipc: B21D 22/02 20060101AFI20120320BHEP

Ipc: B21C 37/18 20060101ALI20120320BHEP

Ipc: B21D 41/02 20060101ALI20120320BHEP

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 589096

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008008931

Country of ref document: DE

Effective date: 20130214

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2401306

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20130418

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

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: 20121219

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: 20121219

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: 20130319

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20121219

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: 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: 20130320

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: 20121219

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: 20121219

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

Ref country code: BG

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

Effective date: 20130319

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: 20121219

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: 20130419

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: 20121219

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: 20121219

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: 20121219

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: 20130419

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: 20121219

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: 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: 20121219

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

Ref country code: CZ

Payment date: 20130913

Year of fee payment: 6

26N No opposition filed

Effective date: 20130920

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

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: 20121219

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: 20121219

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008008931

Country of ref document: DE

Effective date: 20130920

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

Ref country code: GB

Payment date: 20131017

Year of fee payment: 6

Ref country code: AT

Payment date: 20131018

Year of fee payment: 6

Ref country code: SE

Payment date: 20131017

Year of fee payment: 6

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

Ref country code: ES

Payment date: 20131018

Year of fee payment: 6

BERE Be: lapsed

Owner name: THYSSENKRUPP STEEL EUROPE A.G.

Effective date: 20131031

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

Ref country code: MC

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

Effective date: 20121219

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: LI

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

Effective date: 20131031

Ref country code: CH

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

Effective date: 20131031

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: 20131031

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: 20131017

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

Ref country code: FR

Payment date: 20141016

Year of fee payment: 7

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

Ref country code: IT

Payment date: 20141017

Year of fee payment: 7

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 589096

Country of ref document: AT

Kind code of ref document: T

Effective date: 20141017

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

Effective date: 20141017

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

Ref country code: TR

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

Effective date: 20121219

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

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: 20081017

Ref country code: SE

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

Effective date: 20141018

Ref country code: LU

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

Effective date: 20131017

Ref country code: GB

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

Effective date: 20141017

Ref country code: CZ

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

Effective date: 20141017

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: 20141017

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: 20121219

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20151126

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

Ref country code: ES

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

Effective date: 20141018

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 NON-PAYMENT OF DUE FEES

Effective date: 20151017

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160630

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: 20151102

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

Ref country code: DE

Payment date: 20191021

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502008008931

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20210501