EP0894548B1 - Method and device for forming bulges on elements - Google Patents

Method and device for forming bulges on elements Download PDF

Info

Publication number
EP0894548B1
EP0894548B1 EP98113616A EP98113616A EP0894548B1 EP 0894548 B1 EP0894548 B1 EP 0894548B1 EP 98113616 A EP98113616 A EP 98113616A EP 98113616 A EP98113616 A EP 98113616A EP 0894548 B1 EP0894548 B1 EP 0894548B1
Authority
EP
European Patent Office
Prior art keywords
ram
hollow section
counter
pressure
branch
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.)
Expired - Lifetime
Application number
EP98113616A
Other languages
German (de)
French (fr)
Other versions
EP0894548A3 (en
EP0894548A2 (en
Inventor
Arndt Birkert
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0894548A2 publication Critical patent/EP0894548A2/en
Publication of EP0894548A3 publication Critical patent/EP0894548A3/en
Application granted granted Critical
Publication of EP0894548B1 publication Critical patent/EP0894548B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/037—Forming branched tubes
    • 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
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/294—Forming collars by compressing a fluid or a yieldable or resilient mass in the tube

Definitions

  • the invention relates to a method for producing secondary shaped elements such as neckings, bulges and raised elongated Flat spots on elongated, extensive closed hollow profiles by means of hydroforming the preamble of claim 1 and a device for Implementation of the method according to the preamble of the claim 6.
  • a generic method or a generic device is known from DE 94 07 812.2 U1.
  • a secondary hollow element in the form of a tubular hollow profile a hollow cylindrical neck is created by the hollow profile inserted in a two-part hydroforming tool and after closing it with one from an externally arranged one High-pressure fluid generating system generated high-pressure fluid is applied on the inside.
  • the according to the course engraving of the hollow profile blank that conforms to the contour Forming tool has a branch into which the hollow profile material under the influence of high pressure together with an axial compression movement following the hollow profile material by applying the hollow profile on the front by means of two axially opposite each other in the engraving towards each other moved pressure stamp with formation of a neck is pushed into it.
  • a counter-punch is slidably guided in the branch, which rests on the hollow profile during the entire molding process and with a counter-expansive force Internal pressure directed force acts on the hollow profile, the counter stamp controlled controlled evasive so that the necking does not run suddenly but in a controlled manner.
  • the countermark ensures that the Hollow section material in the cap area of the necking is not excessive thins out so that up to a certain level of necking the formation can run reliably.
  • the invention has for its object a generic To further develop a method and a generic device, that an extension of the process limits at Production of a secondary form element with regard to an enlargement its height is reliable and achieved in a simple manner can be.
  • the task is according to the invention by the features of the claim 1 regarding the procedure and the characteristics of claim 6 solved with respect to the device.
  • the invention is due to the high pressure system of the hollow profile on the counter-punch in the counter-punch Submitted hollow profile material in the branch area, wherein the maximum material stress in the following less claimed fiber of the material takes place.
  • the hollow profile in the formation of the secondary form element Mouth area of the branch is relieved, since there by the in the branch area submitted material after the first to be made Protuberance of the hollow profile by pulling back the The usual expansion widened only significantly later the hollow profile wall and thus the material thinning occurs.
  • the secondary form element is by expanding the hollow profile with one generated in it High pressure fluid molded, during the molding process the counter stamp evasive towards the outside as the shape increases supports the hollow profile in a controlled manner in the forming area.
  • a hollow profile 1 is shown, which is in the engraving 2 of an internal high pressure forming tool 3 of the invention Device is introduced.
  • the forming tool 3 is in an upper tool 4 and a lower tool 5 divided, the Partition plane 23 between the two tool parts 4 and 5 the horizontal center plane of the hollow profile 1 coincides.
  • the upper tool 4 there is a radial profile on the hollow profile 1 directed recess 6 formed in the engraving 2nd opens and represents a branch of the engraving 2.
  • the cross section the branch can be circular, oval, rectangular or be polygonal, symmetrical or asymmetrical.
  • the Engraving 2 of the hydroforming tool 3 is otherwise fluidly connectable to a high-pressure fluid generating system.
  • a stop body 7 is rigid, that is, immovable arranged, wherein it is pressed into the recess 6 can be or is permanently supported on the back.
  • the stop body 7 hugs the branch wall 8 true to the contour all around and lies with its face facing the engraving 9 from the mouth area 10 of the branch to the engraving 2 by one certain distance back into the recess 6, which the Height of the secondary molded element 11 formed later forms, wherein the stop body 7 the expansion movement of the hollow profile material limited when forming as a stop.
  • the stop body 7 can also be an integral part of the upper tool 4.
  • the stop body 7 has a central passage 12, in the back with a mechanical or hydraulic Drive provided counter punch 13 is guided.
  • the counter-punch 13 has approximately the same cross-sectional shape of the stop body 7 and has the hollow profile on it 1 facing end face 14 a peripheral bevel.
  • the bevel advantageously results in a reliable process Applying the hollow profile material to the counter-punch 13, in which a notch of a sharp edge of the stamp 13 in the hollow profile material and thus susceptibility to cracking during forming is prevented by means of high pressure.
  • the end face 14 can also be rounded at the edge be trained.
  • Another conceivable possibility is that the counter punch 13 in cross section the recess 6 of length after filling out.
  • the counter punch is in the closed forming tool 3 13 out of the stop body 7 onto the hollow profile 1, which is arranged in the engraving 2 with little play and turns it over with its end face 14.
  • the counter punch 13 moved out of the stop body 7 forms with the branch wall 8 by its spacing from it an annular gap, the width of which is suitable Dimensioning - as given in the exemplary embodiment it creates an annular space 15.
  • the hollow profile 1 stands during the inversion process or, as shown in Fig. 1b, after completed insertion process under high internal pressure, flows the hollow profile material not only from the insertion point 17 immediately surrounding area 16 of the hollow profile 1 also from the area 18 of the engraving adjoining the branch 2 to the insertion point 17 and places itself on the counter stamp 13 circumferentially and on the front.
  • This will make hollow profile material condensed to the mouth region 10 of the branch, whereby Material of the hollow profile 1 for the formation of the secondary form element 11 and the height of the mold is therefore reliable can be increased.
  • Annulus 15 is hollow profile material at the same time the mentioned application on the counter-stamp in the plunge position 13 past this also from area 16 and 18 in displaced the annular space 15 so that hollow profile material even before the secondary molding element 11 is actually shaped what is present in the molding area 19 for molding synonymous with an additional presentation of hollow profile material and another process-reliable increase the mold height is.
  • the hollow profile 1 Secondary shaped element 11 shaped. This can be done by simply widening take place, which is particularly the case with long hollow profiles due to the friction ratio no axial pushing by attacking on both end faces of the hollow profile Printing stamping is possible, can be used. A pushing in during the expansion at relatively short Hollow profiles, on the other hand, are easily possible, which also material from the hollow profile ends into the shaping region 19 can be supplied, which also increases the Mold height of the secondary mold element 11 contributes.
  • the counter stamp 13 acts as usual the hollow profile 1 during the molding process support in the molding area, see above that the formation of the secondary mold element 11 is controlled.
  • the hollow profile material lays down in the final phase of the molding process at least on the stop body 7 and the branch wall 8 in rough approximation, the counter-stamp 13 is sunk into the stop body 7, so that both of them End faces 14 and 9 are flush with each other (Fig. 1d).
  • the secondary form elements 11 can also be used as neckings or bulges on elongated, circumferentially closed Hollow sections 1 can be formed and can be or mounting surfaces.
  • sheet metal parts and their Attachment to a hollow profile can be saved with which this Function is also available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Nebenformelementen wie Aushalsungen, Ausbauchungen und erhabenen länglichen Flachstellen an länglichen, umfänglich geschlossenen Hohlprofilen mittels Innenhochdruckumformen gemäß dem Oberbegriff des Patentanspruches 1 und eine Vorrichtung zur Durchführung des Verfahrens gemäß dem Oberbegriff des Patentanspruches 6.The invention relates to a method for producing secondary shaped elements such as neckings, bulges and raised elongated Flat spots on elongated, extensive closed hollow profiles by means of hydroforming the preamble of claim 1 and a device for Implementation of the method according to the preamble of the claim 6.

Ein gattungsgemäßes Verfahren bzw. eine gattungsgemäße Vorrichtung ist aus dem DE 94 07 812.2 U1 bekannt. In diesem wird an einem rohrförmigen Hohlprofil ein Nebenformelement in der Form einer hohlzylindrischen Aushalsung erzeugt, indem das Hohlprofil in ein zweigeteiltes Innenhochdruck-Umformwerkzeug eingelegt und nach dessen Schließen mit einem von einer extern angeordneten Fluidhochdruckerzeugungsanlage erzeugten Fluidhochdruck innenseitig beaufschlagt wird. Die entsprechend dem Verlauf des Hohlprofilrohlings konturgerecht angepaßte Gravur des Umformwerkzeuges weist einen Abzweig auf, in den das Hohlprofilmaterial unter Einwirkung des Innenhochdruckes gemeinsam mit einer axialen hohlprofilmaterialnachführenden Stauchbewegung durch stirnseitiges Beaufschlagen des Hohlprofiles mittels zweier einander axial gegenüberliegender in der Gravur aufeinanderzu verschobener Druckstempel unter Ausbildung einer Aushalsung hineinverdrängt wird. Um ein frühzeitiges Bersten des Hohlprofilmaterials im Ausformbereich der Aushalsung zu verhindern, ist in dem Abzweig ein Gegenstempel verschiebbar geführt, der während des gesamten Ausformvorganges an dem Hohlprofil anliegt und mit einer entgegen der Kraft des expansiv wirkenden Innenhochdruckes gerichteten Kraft das Hohlprofil beaufschlagt, wobei der Gegenstempel gesteuert nach außen ausweicht, so daß die Aushalsung nicht schlagartig sondern kontrolliert abläuft. Gleichzeitig wird durch den Gegenstempel erreicht, daß sich das Hohlprofilmaterial im Kappenbereich der Aushalsung nicht übermäßig ausdünnt, so daß bis zu einer bestimmten Höhe der Aushalsung die Ausformung prozeßsicher ablaufen kann. Diese Höhe der Aushalsung ist abhängig von der Materialausdünnung des Hohlprofiles im Mündungsbereich des Abzweiges zur Gravur, da dort - auch bei großem Radius der dortigen Biegekante - eine Abstreckung auftritt, und von der Materialansammlung im erwähnten Kappenbereich. Das beschriebene Verfahren betrifft für einen prozeßsicheren Ablauf der Herstellung ausschließlich kurze Hohlprofile, da bei langen Hohlprofilen im Bereich von etwa 1m und länger die Reibungskräfte zwischen Gravurwandung und Hohlprofil beim gezeigten axialen Nachschieben so groß werden, daß dieses ohne unerwünschte Faltenbildung des Profiles und/oder Scherrisse im Profil nicht mehr möglich ist. Bei langen Hohlprofilen kann daher nur durch einen reinen Aufweitprozeß die Aushalsung hergestellt werden, wobei jedoch für diese nur das von vornherein im Aushalsbereich vorhandene Material zur Verfügung steht und dieses somit dort nur aus der Wandstärke des Hohlprofiles heraus bezogen werden kann. Eine deutlich sichtbare längliche Aushalsung ist damit nicht erzielbar.A generic method or a generic device is known from DE 94 07 812.2 U1. In this is on a secondary hollow element in the form of a tubular hollow profile a hollow cylindrical neck is created by the hollow profile inserted in a two-part hydroforming tool and after closing it with one from an externally arranged one High-pressure fluid generating system generated high-pressure fluid is applied on the inside. The according to the course engraving of the hollow profile blank that conforms to the contour Forming tool has a branch into which the hollow profile material under the influence of high pressure together with an axial compression movement following the hollow profile material by applying the hollow profile on the front by means of two axially opposite each other in the engraving towards each other moved pressure stamp with formation of a neck is pushed into it. In order to prematurely burst the To prevent hollow profile material in the molding area of the neck, a counter-punch is slidably guided in the branch, which rests on the hollow profile during the entire molding process and with a counter-expansive force Internal pressure directed force acts on the hollow profile, the counter stamp controlled controlled evasive so that the necking does not run suddenly but in a controlled manner. At the same time, the countermark ensures that the Hollow section material in the cap area of the necking is not excessive thins out so that up to a certain level of necking the formation can run reliably. This height the necking depends on the material thinning of the Hollow profile in the mouth area of the branch for engraving, because there - even with a large radius of the bending edge there - one Stripping occurs, and from the material accumulation mentioned in the Cap area. The described method concerns for one reliable process of production only short Hollow profiles, as long hollow profiles in the range of about 1m and longer the frictional forces between the engraving wall and the hollow profile in the axial pushing shown become so large that this without undesired wrinkling of the profile and / or Tears in the profile is no longer possible. With long hollow profiles can therefore only through a pure expansion process Neck are made, but for this only that Material available in the neck area from the outset stands and this is there only from the wall thickness of the Hollow profile can be obtained. A clearly visible one elongated necking cannot be achieved with this.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Verfahren bzw. eine gattungsgemäße Vorrichtung dahingehend weiterzubilden, daß eine Erweiterung der Verfahrensgrenzen bei der Herstellung eines Nebenformelementes hinsichtlich einer Vergrößerung seiner Höhe prozeßsicher und in einfacher Weise erreicht werden kann.The invention has for its object a generic To further develop a method and a generic device, that an extension of the process limits at Production of a secondary form element with regard to an enlargement its height is reliable and achieved in a simple manner can be.

Die Aufgabe ist erfindungsgemäß durch die Merkmale des Patentanspruches 1 hinsichtlich des Verfahrens und durch die Merkmale des Patentanspruches 6 hinsichtlich der Vorrichtung gelöst. The task is according to the invention by the features of the claim 1 regarding the procedure and the characteristics of claim 6 solved with respect to the device.

Dank der Erfindung wird durch die innenhochdruckbedingte Anlage des Hohlprofils am Gegenstempel in Einstülplage des Gegenstempels Hohlprofilmaterial in den Abzweigbereich vorgelegt, wobei die maximale Werkstoffbeanspruchung in der nachfolgend weniger beanspruchten Faser des Materials erfolgt. Dadurch wird zum einen bei der Ausformung des Nebenformelementes das Hohlprofil im Mündungsbereich des Abzweiges entlastet, da dort durch das in den Abzweigbereich vorgelegte Material nach der zuerst zu erfolgenden Ausstülpung des Hohlprofiles durch Zurückziehen des Gegenstempels erst erheblich später der übliche Aufweitzug an der Hohlprofilwandung und damit die Materialausdünnung eintritt. Gleichzeitig dünnt sich aufgrund der gesteigerten Materialansammlung im Abzweigbereich auch der Kappenbereich des Nebenformelementes wesentlich später aus, so daß insgesamt bei gleichem Ausdünnungszustand des Hohlprofilmaterials an den kritischen Stellen des Nebenformelementes im Mündungsbereich des Abzweiges und im Kappenbereich im Vergleich mit herkömmlichen Verfahren zur Herstellung von Nebenformelementen höhere Höhen des Nebenformelementes bei dessen Ausformung erreichbar sind ohne daß Risse an diesen Stellen und damit ein Bersten des Hohlprofils im Abzweig auftreten. Dadurch werden die Verfahrensgrenzen bei der Herstellung eines Nebenformelementes hinsichtlich einer Vergrößerung seiner Höhe erweitert sowie die Prozeßsicherheit des Ausformvorganges gewährleistet. Damit kann auch die Ausschußrate bei der Herstellung von Hohlprofilen mit Nebenformelementen wesentlich verringert werden. Die Ausbildung der vergrößerten Höhe des Nebenformelementes wird dabei in einfacher Weise ermöglicht, da der durch ständige stützende Anlage am Hohlprofil zum kontrollierten Ausformen des Nebenformelementes ohnehin vorhandene Gegenstempel zum Einstülpen und damit zur Materialvorlage verwandt wird. Das Nebenformelement wird durch Aufweiten des Hohlprofiles mit einem in diesem erzeugten Fluidhochdruck ausgeformt, wobei während des Ausformvorganges der Gegenstempel mit zunehmender Ausformung nach außen ausweichend das Hohlprofil im Ausformbereich gesteuert abstützt. Thanks to the invention is due to the high pressure system of the hollow profile on the counter-punch in the counter-punch Submitted hollow profile material in the branch area, wherein the maximum material stress in the following less claimed fiber of the material takes place. For one thing the hollow profile in the formation of the secondary form element Mouth area of the branch is relieved, since there by the in the branch area submitted material after the first to be made Protuberance of the hollow profile by pulling back the The usual expansion widened only significantly later the hollow profile wall and thus the material thinning occurs. At the same time thins out due to the increased material accumulation in the branch area also the cap area of the secondary form element much later, so that a total of same state of thinning of the hollow profile material at the critical Place the secondary form element in the mouth area of the Branch and in the cap area in comparison with conventional Process for the production of secondary form elements of higher heights of the secondary form element can be reached when it is shaped without cracks in these places and thus a bursting of the Hollow profile occur in the branch. This will limit the process in the manufacture of a secondary form element with regard to an increase in its height expands as well Process reliability of the molding process is guaranteed. So that can also the reject rate in the production of hollow profiles Subsidiary elements can be significantly reduced. Training the increased height of the secondary form element is easier Way made possible by the constant supportive system on the hollow profile for controlled shaping of the secondary form element already existing counter stamps for invading and thus is used for the material template. The secondary form element is by expanding the hollow profile with one generated in it High pressure fluid molded, during the molding process the counter stamp evasive towards the outside as the shape increases supports the hollow profile in a controlled manner in the forming area.

Zweckmäßige Ausgestaltungen der Erfindung können den Unteransprüchen entnommen werden; im übrigen ist die Erfindung anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles nachfolgend näher erläutert; dabei zeigt:

  • Fig. 1 a-d den erfindungsgemäßen Ausformprozeß eines Nebenformelementes an einem Hohlprofil in einer Querschnittsdarstellung,
  • Fig. 2 das erfindungsgemäß ausgeformte Hohlprofil in einer Seitenansicht.
    • Expedient embodiments of the invention can be found in the subclaims; otherwise the invention is explained in more detail below with reference to an embodiment shown in the drawings; shows:
  • 1 ad the molding process according to the invention of a secondary molded element on a hollow profile in a cross-sectional view,
  • Fig. 2 shows the hollow profile formed according to the invention in a side view.

    • In Fig. 1a-d ist ein Hohlprofil 1 dargestellt, das in der Gravur 2 eines Innenhochdruck-Umformwerkzeuges 3 der erfindungsgemäßen Vorrichtung eingebracht ist. Das Umformwerkzeug 3 ist in ein Oberwerkzeug 4 und ein Unterwerkzeug 5 geteilt, wobei die Trennebene 23 zwischen den beiden Werkzeugteilen 4 und 5 mit der horizontalen Mittenebene des Hohlprofiles 1 übereinstimmt. Im Oberwerkzeug 4 ist eine radial auf das eingebrachte Hohlprofil 1 gerichtete Aussparung 6 ausgebildet, die in die Gravur 2 mündet und einen Abzweig der Gravur 2 darstellt. Der Querschnitt des Abzweiges kann kreisförmig, oval, rechteckig oder polygonal, symmetrisch oder unsymmetrisch ausgebildet sein. Die Gravur 2 des Innenhochdruck-Umformwerkzeuges 3 ist im übrigen mit einer Fluidhochdruckerzeugungsanlage fluidisch verbindbar.In Fig. 1a-d a hollow profile 1 is shown, which is in the engraving 2 of an internal high pressure forming tool 3 of the invention Device is introduced. The forming tool 3 is in an upper tool 4 and a lower tool 5 divided, the Partition plane 23 between the two tool parts 4 and 5 the horizontal center plane of the hollow profile 1 coincides. In the upper tool 4 there is a radial profile on the hollow profile 1 directed recess 6 formed in the engraving 2nd opens and represents a branch of the engraving 2. The cross section the branch can be circular, oval, rectangular or be polygonal, symmetrical or asymmetrical. The Engraving 2 of the hydroforming tool 3 is otherwise fluidly connectable to a high-pressure fluid generating system.

    In der Aussparung 6 ist ein Anschlagkörper 7 starr, also unverrückbar angeordnet, wobei er in der Aussparung 6 eingepreßt sein kann oder dauerhaft rückseitig abgestützt ist. Der Anschlagkörper 7 schmiegt sich an die Abzweigwandung 8 konturtreu umlaufend an und liegt mit seiner gravurzugewandten Stirnseite 9 vom Mündungsbereich 10 des Abzweiges zur Gravur 2 um einen bestimmten Abstand in die Aussparung 6 zurückversetzt, der die Höhe des später ausgeformten Nebenformelementes 11 bildet, wobei der Anschlagkörper 7 die Aufweitbewegung des Hohlprofilmaterials beim Umformen als Anschlag begrenzt. Der Anschlagkörper 7 kann auch einstückiger Bestandteil des Oberwerkzeuges 4 sein. In the recess 6, a stop body 7 is rigid, that is, immovable arranged, wherein it is pressed into the recess 6 can be or is permanently supported on the back. The stop body 7 hugs the branch wall 8 true to the contour all around and lies with its face facing the engraving 9 from the mouth area 10 of the branch to the engraving 2 by one certain distance back into the recess 6, which the Height of the secondary molded element 11 formed later forms, wherein the stop body 7 the expansion movement of the hollow profile material limited when forming as a stop. The stop body 7 can also be an integral part of the upper tool 4.

    Der Anschlagkörper 7 weist eine zentrale Durchführung 12 auf, in der ein rückseitig mit einem mechanischen oder hydraulischen Antrieb versehener Gegenstempel 13 verschiebbar geführt ist. Der Gegenstempel 13 weist in etwa die gleiche Querschnittsform des Anschlagkörpers 7 auf und besitzt an seiner dem Hohlprofil 1 zugewandten Stirnseite 14 randseitig eine umlaufende Anschrägung. Die Anschrägung ergibt in vorteilhafter Weise ein prozeßsicheres Anlegen des Hohlprofilmaterials am Gegenstempel 13, bei dem eine Einkerbung eines scharfen Kante des Stempels 13 in das Hohlprofilmaterial und damit eine Rißanfälligkeit beim Umformen mittels Innenhochdruck verhindert wird. Anstelle der Anschrägung kann die Stirnseite 14 randseitig auch abgerundet ausgebildet sein. Eine weitere denkbare Möglichkeit ist, daß der Gegenstempel 13 im Querschnitt die Aussparung 6 der Länge nach ausfüllt.The stop body 7 has a central passage 12, in the back with a mechanical or hydraulic Drive provided counter punch 13 is guided. The counter-punch 13 has approximately the same cross-sectional shape of the stop body 7 and has the hollow profile on it 1 facing end face 14 a peripheral bevel. The bevel advantageously results in a reliable process Applying the hollow profile material to the counter-punch 13, in which a notch of a sharp edge of the stamp 13 in the hollow profile material and thus susceptibility to cracking during forming is prevented by means of high pressure. Instead of the bevel the end face 14 can also be rounded at the edge be trained. Another conceivable possibility is that the counter punch 13 in cross section the recess 6 of length after filling out.

    Nach Fig. 1a wird im geschlossenen Umformwerkzeug 3 der Gegenstempel 13 aus dem Anschlagkörper 7 heraus auf das Hohlprofil 1, das mit geringem Spiel in der Gravur 2 angeordnet ist, verfahren und stülpt dieses mit seiner Stirnseite 14 ein. Solange der Gegenstempel 13 aus dem Anschlagkörper 7 herausgefahren ist, bildet dieser mit der Abzweigwandung 8 durch seine Beabstandung von ihr einen Ringspalt aus, dessen Breite bei geeigneter Dimensionierung - wie im Ausführungsbeispiel gegebenaus ihm einen Ringraum 15 entstehen läßt.1a, the counter punch is in the closed forming tool 3 13 out of the stop body 7 onto the hollow profile 1, which is arranged in the engraving 2 with little play and turns it over with its end face 14. As long as the counter punch 13 moved out of the stop body 7 is, this forms with the branch wall 8 by its spacing from it an annular gap, the width of which is suitable Dimensioning - as given in the exemplary embodiment it creates an annular space 15.

    Steht beim erfindungsgemäßen Verfahren das Hohlprofil 1 während des Einstülpvorganges oder, wie in Fig. 1b gezeigt ist, nach abgeschlossenem Einstülpvorgang unter Innenhochdruck, fließt das Hohlprofilmaterial nicht nur aus dem die Einstülpstelle 17 unmittelbar umgebenden Bereich 16 des Hohlprofiles 1 sondern auch aus dem an den Abzweig anschließenden Bereich 18 der Gravur 2 zur Einstülpstelle 17 und legt sich an den Gegenstempel 13 umfänglich und stirnseitig an. Dadurch wird Hohlprofilmaterial zum Mündungsbereich 10 des Abzweiges hin verdichtet, wodurch Material des Hohlprofiles 1 für die Ausformung des Nebenformelementes 11 vorgehalten und die Ausformhöhe damit prozeßsicher steigerbar wird.In the method according to the invention, the hollow profile 1 stands during the inversion process or, as shown in Fig. 1b, after completed insertion process under high internal pressure, flows the hollow profile material not only from the insertion point 17 immediately surrounding area 16 of the hollow profile 1 also from the area 18 of the engraving adjoining the branch 2 to the insertion point 17 and places itself on the counter stamp 13 circumferentially and on the front. This will make hollow profile material condensed to the mouth region 10 of the branch, whereby Material of the hollow profile 1 for the formation of the secondary form element 11 and the height of the mold is therefore reliable can be increased.

    Durch die Ausbildung eines relativ breiten im Querschnitt länglichen Ringraumes 15 wird Hohlprofilmaterial gleichzeitig mit dem erwähnten Anlegen am in Einstülplage befindlichen Gegenstempel 13 an diesem vorbei auch aus dem Bereich 16 und 18 in den Ringraum 15 hineinverdrängt, so daß Hohlprofilmaterial schon vor der eigentlichen Ausformung des Nebenformelementes 11 im Ausformbereich 19 für die Ausformung vorhanden ist, was gleichbedeutend mit einem zusätzlichen Vorlegen von Hohlprofilmaterial und einer weiteren prozeßsicheren Steigerbarkeit der Ausformhöhe ist.Through the formation of a relatively wide elongated in cross section Annulus 15 is hollow profile material at the same time the mentioned application on the counter-stamp in the plunge position 13 past this also from area 16 and 18 in displaced the annular space 15 so that hollow profile material even before the secondary molding element 11 is actually shaped what is present in the molding area 19 for molding synonymous with an additional presentation of hollow profile material and another process-reliable increase the mold height is.

    Durch den beim Einstülpen im Hohlprofil 1 verursachten Zug des Gegenstempels 13 wird der Fluß des Hohlprofilmaterials von der Biegekante 20 zwischen Abzweig und Gravur 2 weg zum Gegenstempel 13 hin gerichtet, wonach das Auftreten einer Ausdünnung des Hohlprofilmaterials durch die beim Aufweiten verfahrensbedingte Abstreckung an der Biegekante 20 aufgrund der Entlastung des Kantenbereiches vermieden wird. Um weiterhin bei der Ausformung des Nebenformelementes 11 die Abstreckung zu reduzieren, ist die Biegekante 20 mit einem großen Radius ausgebildet, wodurch die Gravur 2 sanft in den Abzweig übergeht.Due to the pull of the hollow profile 1 caused by the insertion Counter stamp 13 is the flow of the hollow profile material from the Bending edge 20 between branch and engraving 2 away to the counter stamp 13 directed, after which the occurrence of a thinning of the Hollow profile material due to the process-related during expansion Ironing on the bending edge 20 due to the relief of the Edge area is avoided. To continue with the molding of the secondary form element 11 is to reduce the stretching the bending edge 20 is formed with a large radius, whereby the engraving 2 merges smoothly into the branch.

    Es ist im übrigen auch denkbar, daß der Einstülpvorgang ohne Innenhochdruck erfolgt. Hierbei wird das Hohlprofil 1 über einen wesentlich weiteren Bereich hinweg von der Biegekante 20 aus gesehen eingebogen, da der der Einbiegung entgegenwirkende Innenhochdruck fehlt. Dadurch kann bei nachträglichem Aufbauen des Innenhochdruckes aus bezüglich des Ausformbereiches 19 viel tiefer liegenden Umfangsbereichen des Hohlprofiles 1 Material zum Abzweig hin gefördert werden, da sich das Hohlprofil 1 zum Ausformbereich 19 hin - neben dem üblichen Anlegen des Hohlprofiles 1 an die Gravur 2 - streckt. Hierdurch ist somit ein Vorlegen von weiterem Hohlprofilmaterial in Richtung des Ausformbereiches 19 und damit eine zusätzliche prozeßsichere Vergrößerung der Ausformhöhe des Nebenformelementes 11 möglich.It is also conceivable that the turning process without Internal high pressure takes place. Here, the hollow profile 1 over a much further area from the bending edge 20 seen from bent, since the counteracting the bending Internal high pressure is missing. This can be done when retrofitting of the internal high pressure with respect to the molding area 19 a lot lower lying peripheral areas of the hollow profile 1 material be promoted to the branch, since the hollow profile 1 to Forming area 19 - in addition to the usual application of the hollow profile 1 to the engraving 2 - stretches. This means that submission is required of further hollow profile material in the direction of the forming area 19 and thus an additional reliable enlargement the height of the secondary mold element 11 possible.

    Nach dem Einstülpen des Hohlprofiles 1 und dem Anlegen des Hohlprofilmaterials seitlich an den Gegenstempel 13 unter Innenhochdruck wird bei Beibehaltung dieses Druckes der Gegenstempel 13 zurückgezogen (Fig. 1c). Dabei wird die eingestülpte Stelle 17 kontinuierlich durch den Innenhochdruck wieder ausgestülpt, wobei weiter Hohlprofilmaterial in den noch existierenden Ringraum 15 hineinverdrängt wird.After the hollow profile 1 has been turned in and the Hollow profile material laterally to the counter-punch 13 under high internal pressure the counter-stamp will remain if this pressure is maintained 13 withdrawn (Fig. 1c). The indented Point 17 continuously turned up again by the internal high pressure, with further hollow profile material in the still existing Annulus 15 is pushed into it.

    Nach dem Ausstülpvorgang, bei dem der Gegenstempel 13 ständig in Anlage am Hohlprofil 1 steht, wird aus dem Hohlprofil 1 das Nebenformelement 11 ausgeformt. Dies kann durch reines Aufweiten erfolgen, was insbesondere bei langen Hohlprofilen, bei denen aufgrund der Reibungsverhälnisse kein axiales Nachschieben mittels an beiden Stirnseiten des Hohlprofiles angreifenden Druckstempeln prozeßsicher möglich ist, verwandt werden kann. Ein Nachschieben während des Aufweitens bei relativ kurzen Hohlprofilen ist dagegen ohne weiteres möglich, wodurch auch von den Hohlprofilenden her Material in den Ausformbereich 19 nachgeliefert werden kann, was ebenfalls zur Steigerung der Ausformhöhe des Nebenformelementes 11 beiträgt. Der Gegenstempel 13 fungiert als üblicher das Hohlprofil 1 während des Ausformvorganges im Ausformbereich abstützender Gegenhalter, so daß die Ausformung des Nebenformelementes 11 kontrolliert abläuft.After the protuberance process, in which the counter-punch 13 constantly is in contact with the hollow profile 1, the hollow profile 1 Secondary shaped element 11 shaped. This can be done by simply widening take place, which is particularly the case with long hollow profiles due to the friction ratio no axial pushing by attacking on both end faces of the hollow profile Printing stamping is possible, can be used. A pushing in during the expansion at relatively short Hollow profiles, on the other hand, are easily possible, which also material from the hollow profile ends into the shaping region 19 can be supplied, which also increases the Mold height of the secondary mold element 11 contributes. The counter stamp 13 acts as usual the hollow profile 1 during the molding process support in the molding area, see above that the formation of the secondary mold element 11 is controlled.

    In der Endphase des Ausformvorganges legt sich das Hohlprofilmaterial am Anschlagkörper 7 und der Abzweigwandung 8 zumindest in grober Annäherung konturtreu an, wobei der Gegenstempel 13 in den Anschlagkörper 7 hineinversenkt wird, so daß deren beide Stirnseiten 14 und 9 miteinander bündig abschließen (Fig. 1d).The hollow profile material lays down in the final phase of the molding process at least on the stop body 7 and the branch wall 8 in rough approximation, the counter-stamp 13 is sunk into the stop body 7, so that both of them End faces 14 and 9 are flush with each other (Fig. 1d).

    Weiterhin von Vorteil ist es, wenn die Stirnseite 14 des Gegenstempels 13, die Stirnseite 9 des Anschlagkörpers 7 und die Abzweigwandung 8 die exakte Endform des Nebenformelementes 11 darstellen. Dann kann zum Abschluß des Ausformvorganges bei gegenüber dem Ausformvorgang gesteigertem Innenhochdruck eine Kalibrierung des Nebenformelementes 11 erfolgen, das damit in seine Endform, die in Fig. 2 in der Form einer erhabenene länglichen Flachstelle gezeigt ist, konturgerecht gebracht wird.It is also advantageous if the end face 14 of the counter-punch 13, the end face 9 of the stop body 7 and the branch wall 8 the exact final shape of the secondary form element 11 represent. Then at the end of the molding process a calibration after the molding process of the secondary form element 11, which is thus in its final shape, which in Fig. 2 is in the form of a raised elongated Flat spot is shown, is brought in line with the contour.

    Die Nebenformelemente 11 können auch als Aushalsungen oder Ausbauchungen an länglichen, umfänglich geschlossenen Hohlprofilen 1 ausgebildet sein und können als Flansch- oder Montageflächen dienen. Hierbei können Blechteile und deren Anbringung an ein Hohlprofil eingespart werden, mit denen diese Funktion ebenfalls erreichbar ist.The secondary form elements 11 can also be used as neckings or bulges on elongated, circumferentially closed Hollow sections 1 can be formed and can be or mounting surfaces. Here sheet metal parts and their Attachment to a hollow profile can be saved with which this Function is also available.

    Claims (9)

    1. Method for the production of secondary shaped elements such as neck projections, bulges and raised elongated flat portions in elongated, circumferentially closed hollow sections by internal high-pressure deformation, in which the secondary shaped element is formed by expanding the hollow section by means of a high liquid pressure produced inside it which deforms it locally, while during the expansion process it is supported in a controlled way by a counter-ram which moves outwards as the expansion increases,
      characterised in that
      at the place where the secondary shaped element is to be produced, the hollow section (1) is pushed in by the counter-ram (13), and after this the material of the hollow section is pressed by high liquid pressure circumferentially around and against the end of the ram (13) in the area (16) of the pushed-in portion (17), and after the pushing-in process, the ram (13), which remains in contact with the hollow section (1) throughout the deformation process, is withdrawn so that in cooperation with the high internal pressure the hollow section (1) is pushed out and the secondary shaped element (11) is formed.
    2. Method according to Claim 1,
      characterised in that
      the pushing in of the hollow section (1) takes place with the inside of the hollow section (1) under atmospheric pressure.
    3. Method according to Claim 1,
      characterised in that
      the pushing in of the hollow section (1) takes place with the inside of the hollow section (1) under elevated pressure.
    4. Method according to Claim 1,
      characterised in that
      in the vicinity of the area pushed in by the ram (13), the internal high pressure pushes material of the hollow section past the ram (13) into an expansion region (19) of the secondary shaped element (11).
    5. Method according to Claim 1,
      characterised in that
      once the ram (13) has been withdrawn, the secondary shaped element (11) is calibrated to the correct contour at a liquid pressure higher compared with that of the expansion process.
    6. Device for the production of secondary shaped elements such as neck projections, bulges and raised elongated flat portions in elongated, circumferentially closed hollow sections, with an internal high-pressure forming tool divided into an upper and a lower die, whose cavity holding the hollow section comprises at least one side-branch in which a counter-ram provided with a controlled drive is guided and can move, and with a liquid pressurising unit that can be brought into fluid connection with the internal high-pressure forming tool in order to implement the method according to Claim 1,
      characterised in that
      the counter-ram (13) is guided in a passage (12) through an abutment element (7) whose shape matches that of the wall (8) of the side-branch and which is held in a fixed position in the branch, in such manner that to push in the hollow section (1) held with small clearance in the cavity (2) of the forming die (3), the counter-ram (13) can be moved inwards into the cavity (2) and, to form the secondary shaped element (11) under the action of the internal high pressure, the ram can be withdrawn into the abutment element (7).
    7. Device according to Claim 6,
      characterised in that
      the abutment element (7) and the counter-ram (13), with their sides (9, 14) facing the cavity (2) together with the wall (8) of the side-branch, form the calibration contour of the secondary shaped element (11).
    8. Device according to Claim 6,
      characterised in that
      when the counter-ram (13) is projecting beyond the abutment element (7) in the branch, together with the branch wall (8) it forms an annular space (15) whose dimensions are such that material from the hollow section can be pressed into the annular space (15) under the action of a high internal pressure.
    9. Device according to Claim 6,
      characterised in that
      all the way round the edge, the face (14) is rounded or chamfered.
    EP98113616A 1997-08-02 1998-07-22 Method and device for forming bulges on elements Expired - Lifetime EP0894548B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19733474 1997-08-02
    DE19733474A DE19733474C2 (en) 1997-08-02 1997-08-02 Method and device for producing secondary shaped elements on hollow profiles

    Publications (3)

    Publication Number Publication Date
    EP0894548A2 EP0894548A2 (en) 1999-02-03
    EP0894548A3 EP0894548A3 (en) 2000-04-19
    EP0894548B1 true EP0894548B1 (en) 2001-08-29

    Family

    ID=7837804

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98113616A Expired - Lifetime EP0894548B1 (en) 1997-08-02 1998-07-22 Method and device for forming bulges on elements

    Country Status (4)

    Country Link
    US (1) US6143235A (en)
    EP (1) EP0894548B1 (en)
    DE (2) DE19733474C2 (en)
    ES (1) ES2162376T3 (en)

    Families Citing this family (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10065033C1 (en) * 2000-12-23 2002-07-11 Daimler Chrysler Ag Method for producing a circumferentially closed hollow profile and a device for carrying it out
    JP2003118595A (en) 2001-08-06 2003-04-23 Nsk Ltd Vehicular steering device and its manufacturing method
    DE10162440A1 (en) * 2001-12-19 2003-07-03 Bayerische Motoren Werke Ag forming press
    DE10309625B4 (en) * 2003-03-04 2006-04-13 Audi Ag Method for introducing a side mold into a cavity having a molded part
    US7153127B2 (en) * 2003-05-15 2006-12-26 Graham Packaging Plastic Products Inc. Method and apparatus for blow molding hollow plastic containers
    US20050084648A1 (en) * 2003-10-16 2005-04-21 Olsen Robert F. Process for forming a part having an integral feature, a part produced thereby and apparatus therefor
    DE10356535B3 (en) * 2003-12-04 2004-08-26 Daimlerchrysler Ag Hollow strip production device for T-shaped or branched product has tool in form of cutting device with separating slide adjustable transversely to axis of branch
    US7563403B2 (en) * 2004-07-02 2009-07-21 Graham Packaging Pet Technologies, Inc. Method of reheat blow molding a container
    DE102007007383A1 (en) * 2007-02-12 2008-08-14 Asc Umformtechnik Gmbh Groove or groove-like recess positioning method for motor vehicle, involves introducing pressurized fluid to provide support counteractive to pressing tool, and maintaining fluid for period of forming process to position groove or recess
    DE102007017415B4 (en) 2007-04-13 2016-06-02 Daimler Ag Composite component of a hollow section formed by means of hydroforming and at least one injection-molded element

    Family Cites Families (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1100936B (en) * 1958-07-26 1961-03-02 Kautex Werke Gmbh Method and device for producing tubes from thermoplastic material
    US4510116A (en) * 1983-07-27 1985-04-09 Phillips Petroleum Company Apparatus and method for blow molding
    US4928509A (en) * 1987-07-29 1990-05-29 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
    US4938680A (en) * 1988-10-31 1990-07-03 Guarriello Henry J Reverse lip blow molding apparatus
    US5202078A (en) * 1991-11-15 1993-04-13 Lerio Corporation Process and apparatus for manufacturing containers with thickened flanges and longitudinal reinforcing ribs and containers thereby
    US5469612A (en) * 1993-12-02 1995-11-28 Continental Pet Technologies, Inc. Method for forming a strain-hardenable plastic container
    DE9407812U1 (en) * 1994-05-11 1994-07-21 Zeuna-Stärker GmbH & Co KG, 86154 Augsburg Pipe junction and device for their manufacture
    DE19508632C2 (en) * 1995-03-10 2002-09-19 Audi Ag Method for connecting a first component to a second component
    FR2746339B1 (en) * 1996-03-22 1998-06-05 Plastic Omnium Cie METHOD FOR MANUFACTURING A BEAM OF ATTACHED TUBES, DEVICE FOR CARRYING OUT SUCH A METHOD AND BEAM THUS PRODUCED
    US5750067A (en) * 1996-10-07 1998-05-12 Hellbrugge; Luiz Henrique Method for blow molding hollow article with annular chime and deeply recessed ends

    Also Published As

    Publication number Publication date
    DE59801292D1 (en) 2001-10-04
    EP0894548A3 (en) 2000-04-19
    US6143235A (en) 2000-11-07
    EP0894548A2 (en) 1999-02-03
    DE19733474A1 (en) 1999-02-18
    ES2162376T3 (en) 2001-12-16
    DE19733474C2 (en) 1999-12-09

    Similar Documents

    Publication Publication Date Title
    DE102008047531B3 (en) Holding tube i.e. support rod, for headrest of vehicle interior, has additional application surface formed in side regions of recess, where side regions are adjacent to latching surface, which cooperates with latch element
    WO2006034773A1 (en) Method and device for production of a longitudinal seam welded hollow profile
    WO2006024281A1 (en) Method for producing wheel hub blanks on a compressive forming machine
    EP0894548B1 (en) Method and device for forming bulges on elements
    WO1995031635A1 (en) Pipe junction and device for producing the same
    DE19719629C2 (en) Method and device for manufacturing motor vehicle axle housings
    DE102005036419B4 (en) Device for producing bulged hollow profiles, in particular gas generator housings for airbag devices
    WO2005077561A1 (en) Method and device for producing a peripherally closed hollow profile
    DE10135556B4 (en) Method for mounting bearing rings
    WO2016119940A1 (en) Method and device for producing a collar on a workpiece
    EP0844035A1 (en) Method for producing elongated apertures in hollow profiles and device therefor
    EP1216769B1 (en) Method and apparatus for making a closed hollow section
    EP3253509B1 (en) Method and device for forming a collar on a workpiece
    DE102015206461A1 (en) Method for forming a tubular structural component for motor vehicle seats
    DE4444857C1 (en) Method for forming opening in wall of esp. exhaust pipe
    DE102016116243A1 (en) Method and device for producing a collar on a workpiece
    DE19733476C2 (en) Process for the production of an appropriate mounting location on a hollow profile
    DE10324276B4 (en) Method for producing a hollow profile provided with an end cover and a jack
    DE102015114317A1 (en) Collar with large collar wall thickness
    DE19533828C2 (en) Device for the internal high pressure forming of tubular blanks
    DE10029321C1 (en) Shaping of a passage in a hollow profile uses a shaping tool with high inner pressure with a die to form facing shaped sections and a die cutting edge to work with the high inner fluid pressure
    DE102019000032A1 (en) Method for forming at least one opening on a hollow profile, device for carrying out such a method
    DE102007017030B3 (en) Reshaping method for producing an internal high-pressure reshaping part inserts the internal high-pressure reshaping part into an internal high-pressure reshaping tool while impinging it with internal high pressure after sealing
    DE10033771B4 (en) Method and device for the production of double-walled openings and eversion of a breakthrough
    DE102007007932B3 (en) Connecting method for connecting connection component with inner high pressure-molded part, involves punching retainer, forming additional receiving opening and plugging connection component

    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

    AK Designated contracting states

    Kind code of ref document: A2

    Designated state(s): DE ES FR GB IT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: DAIMLERCHRYSLER AG

    PUAL Search report despatched

    Free format text: ORIGINAL CODE: 0009013

    AK Designated contracting states

    Kind code of ref document: A3

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 20000324

    AKX Designation fees paid

    Free format text: DE ES FR GB

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    RBV Designated contracting states (corrected)

    Designated state(s): DE ES FR GB IT SE

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    17Q First examination report despatched

    Effective date: 20010119

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE ES FR GB IT SE

    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 PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

    Effective date: 20010829

    REF Corresponds to:

    Ref document number: 59801292

    Country of ref document: DE

    Date of ref document: 20011004

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

    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: 20011129

    ET Fr: translation filed
    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2162376

    Country of ref document: ES

    Kind code of ref document: T3

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: IF02

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20011205

    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

    26N No opposition filed
    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20060714

    Year of fee payment: 9

    Ref country code: DE

    Payment date: 20060714

    Year of fee payment: 9

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

    Ref country code: GB

    Payment date: 20060720

    Year of fee payment: 9

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

    Ref country code: ES

    Payment date: 20060728

    Year of fee payment: 9

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

    Effective date: 20070722

    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: 20080201

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

    Ref country code: GB

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

    Effective date: 20070722

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20080331

    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: 20070731

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20070723

    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: 20070723