EP1138409A1 - Hydroforming die for the production of a hollow workpiece from two metal sheets - Google Patents

Hydroforming die for the production of a hollow workpiece from two metal sheets Download PDF

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Publication number
EP1138409A1
EP1138409A1 EP01107667A EP01107667A EP1138409A1 EP 1138409 A1 EP1138409 A1 EP 1138409A1 EP 01107667 A EP01107667 A EP 01107667A EP 01107667 A EP01107667 A EP 01107667A EP 1138409 A1 EP1138409 A1 EP 1138409A1
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EP
European Patent Office
Prior art keywords
tool
feed
feed means
section
opening
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.)
Granted
Application number
EP01107667A
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German (de)
French (fr)
Other versions
EP1138409B1 (en
Inventor
Bernd Dr.-Ing. Engel
Matthias Dr.-Ing. Prier
Ralf Dipl.-Ing. Huber
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.)
Schuler Hydroforming GmbH and Co KG
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Schuler Hydroforming GmbH and Co KG
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Publication date
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Publication of EP1138409A1 publication Critical patent/EP1138409A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • 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
    • B21D26/053—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 characterised by the material of the blanks
    • B21D26/059—Layered blanks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the invention relates to a multi-part mold for after hydroforming Hollow components to be produced from two sheet metal plates, comprising an upper and a lower tool, which have a mold cavity, and between which the sheet metal plates can be clamped at their edge areas, with a feed agent for the active medium in the mold cavity, which is in the tool is slidably arranged and transversely in the direction of the clamping plane of Upper and lower tools can be taken along with the material flowing during the deformation is.
  • the Docking stamp Since the Docking stamp is slidably mounted, remain when material flows also from the area of the edge where the docking stamp is docked, the geometric Conditions when the material flows in unchanged, so that the sealing connection of the docking stamp is also retained.
  • the carrier or the transverse docking punch in the tool itself is slidably arranged, which is a corresponding recess in Tool required.
  • the known design makes it flexible Connector between pressure source and moving docking stamp necessary.
  • the invention is therefore based on the object of a generic molding tool to create that while overcoming the disadvantages of the prior art ensures an effective carrying of the feed means for the active medium.
  • the feed means section opening into the mold cavity in order to move it at least two disks with one Eccentric adjustment penetrates and the eccentric adjustment is selected such that the opposite direction of rotation of the discs of the feed section travels a straight line.
  • the two are Discs with eccentric adjustment around an inner disc that rotates around their center, in an outer disc that also rotates around its center is eccentrically integrated.
  • the one that can be carried along with the flowing movement of the board material Feed means section for introducing the active fluid penetrates the inner pane eccentric, which in turn is taken up by the outer pane. If the sheet material starts to flow during the forming process, it is feed means section opening into the mold cavity or into the feed channel possible, a movement by mutual rotation of the rotatable discs across in the direction of the clamping plane between the upper and lower tool to participate.
  • the diameter corresponds to Inner pane the radius of the outer pane.
  • the molding tool is advantageously further developed by the supply means next to the first section opening into the mold cavity, either the upper or lower tool penetrating fixed feed means section comprise, in a feed channel extending parallel to the displacement path opens out around the first feed means section along its displacement path to be supplied with active agents. In this way it is ensured that the entrained first feed means section by moving along the feed channel is always supplied with active fluid.
  • the suggested driving means are far more integrated in the tool Component.
  • a mounting plate is provided on the tool side, from which the active fluid enters, which receives the two eccentric discs.
  • the feed means section opening into the mold cavity is an axial channel or designed as a nozzle.
  • the inner disc has a conical Muzzle piece with a recessed collar, the muzzle piece the axial channel with the inner pane and indirectly the outer pane anchored in the board.
  • the molding tool has the advantage that both Boards always come into contact with the tool, which creates a thereby exploiting contact friction.
  • the tool shown in FIG. 1 for internal high pressure forming is composed of an upper and lower tool 1, 2, the form a mold cavity between them.
  • Figure 5 which is an overall view on such a tool according to the prior art, should hydroforming are described.
  • it sets consists of the insertion, the docking phase, the expansion phase and the calibration phase together.
  • the two boards 3, 4 in the tool inserted and the two tool parts 1, 2 by guide not shown here and pressing devices moved together, so that the boards rotating be pinched in an edge area.
  • the docking then usually takes place with a docking stamp for introducing the active fluid, the docking stamp is connected to the opening of one board.
  • the active fluid enters through the docking stamp under high pressure and displaces the other board into a feed channel widening in the edge area of the boards. While During this expansion phase, the boards in the mold cavity expand, and it material flows from the pinched edge areas in the direction of the mold cavity to. In the subsequent calibration phase, the marginal areas more firmly clamped, and the blanks are - the engraving of the tool accepting - further widened to the finished contour.
  • FIG. 1 shows a molding tool developed according to the invention at the beginning the expansion phase with a moving feed system. It includes an upper and a lower tool 1, 2, which between them two sheet metal plates 3, Record 4. Along the lower tool 2, on which the edge areas of the lower Board 4 come to rest or are clamped, is a mounting plate 5 provided. This takes an outer circular disc 6 around it The center is arranged rotating. Is eccentric to the outer disc 6 a circular inner pane 7 with 6 smaller in relation to the outer pane Diameter arranged. Extends transversely to the clamping plane of the boards 3, 4 there is a nozzle or an axial channel 8 along the inner or outer pane 7, 6.
  • the inner pane 7 is with a conical mouthpiece 9 at the mouth area of the axial channel 8 and has the thickness of the board in its initial form a collar 10 which is flush with the plate 4 at the top completes.
  • the axial channel 8 has on the other side of the inner pane Extension 11 with an enlarged diameter.
  • a feed or collection channel 12 incorporated, which is below of the two disks extends parallel to the clamping plane of the two boards. Its expansion is due to the maximum diameter of the outer disk 6 limited.
  • This feed channel 12, advantageously designed as a groove, is via a Pressure channel 13, which leads through the lower tool, with the active fluid, i.e. With a hydraulic fluid, fed (here indicated by an arrow).
  • the blanks 3, 4 are inserted into the tool, the board 4, which has been provided with a corresponding opening, is inserted so that the mouthpiece 9 of the axial channel 8 already engages tightly in the opening.
  • the expansion phase initiated by introducing hydraulic fluid.
  • the axial channel 8, which is in the opening of the lower board 4 is firmly anchored, is carried along by the flow movement and on one straight path through the opposite rotation of the two discs emotional. This movement and thus local relocation of the means of transport becomes clear in Figures 2 and 4, in which the directions of rotation of the two Disks and the movement of the axial channel shown by corresponding arrows are.
  • FIG. 3 shows the position of the entrainment means (discs 6, 7) at the end of the expansion phase, whereby the axial channel is located approximately at the end of its displacement.
  • the pivots of the two letters are here with 15, 16 designated.
  • the outer disc moves 6 always around their center 15, while they also around their own Center 16 rotatable inner disc 7 entrains, the axial channel as a whole a straight line movement. The backward movement of the axial channel takes place after removal of the component from the tool by resetting the eccentric disk arrangement in its starting position.
  • the arrangement of the feed means for the active fluid or the driving means are not limited to the lower tool; you can can of course also be arranged in the upper tool.
  • the arrangement of the feed means for the active fluid or the driving means are not limited to the lower tool; you can can of course also be arranged in the upper tool.

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

Abstract

The mould tool has a hollow space defined between cooperating upper and lower tool parts (1,2) between which 2 sheet metal plates (3,4) are clamped at their edges, with a high pressure forming medium supplied to the gap between the sheet metal plates via a pressure medium feed (8,12,13) provided in part by a pair of counter-rotating discs in each tool part, allowing a linear displacement of the pressure medium feed.

Description

Die Erfindung betrifft ein mehrteiliges Formwerkzeug für nach dem Innenhochdruck-Umformen herzustellende hohle Bauteile aus zwei Blechplatinen, umfassend ein Ober- und ein Unterwerkzeug, welche einen Formhohlraum aufweisen, und zwischen denen die Blechplatinen an ihren Randbereichen einspannbar sind, mit einem Zuführmittel für das Wirkmedium in den Formhohlraum, das im Werkzeug verschiebbar angeordnet ist und quer in Richtung der Einspannebene von Ober- und Unterwerkzeug mit dem bei der Verformung mitfließenden Material mitnehmbar ist.The invention relates to a multi-part mold for after hydroforming Hollow components to be produced from two sheet metal plates, comprising an upper and a lower tool, which have a mold cavity, and between which the sheet metal plates can be clamped at their edge areas, with a feed agent for the active medium in the mold cavity, which is in the tool is slidably arranged and transversely in the direction of the clamping plane of Upper and lower tools can be taken along with the material flowing during the deformation is.

Beim Innenhochdruckumformen von Platinen werden bekanntlich zwei Blechplatinen aufeinandergelegt, in ein mindestens zweigeteiltes Werkzeug eingelegt und beim Schließen des Werkzeugs durch die Schließkraft eingespannt. Durch Einleiten eines Wirkfluids in den Trennspalt der beiden Platinen weiten sich diese in die Gravur des Umformwerkzeuges auf. Dabei ergibt sich bei bekannten Andocksystemen mit feststehendem Andockkolben mit Führungskanal für das Wirkmedium der Nachteil, daß durch das plastische Fließen der einen Platine beim Umformvorgang die festangeordnete Durchleitöffnung, die in der anderen Platine eingebracht ist, bzw. der Mündungsbereich des Führungskanals weitgehend abgedichtet wird und sich das Wirkmedium gegen diesen Widerstand zwischen den Platinen einen Weg suchen muß bzw. im Extremfall gestoppt wird.As is well known, two sheet metal plates are used for the internal high pressure forming of blanks placed one on top of the other, placed in a tool divided into at least two and clamped by the closing force when closing the tool. By initiating of an active fluid in the separation gap of the two boards, these expand into the Engraving of the forming tool. This results in known docking systems with fixed docking piston with guide channel for the active medium the disadvantage that the plastic flow of the one plate during the forming process the fixed through opening, which is introduced in the other board is, or the mouth region of the guide channel largely sealed is and the active medium against this resistance between the boards must search for a way or, in extreme cases, be stopped.

Aus der DE 198 16 566 A1 ist ein Formwerkzeug für nach dem Innenhochdruck-Umformen herzustellende Bauteile aus zwei an den Rändern verschweißten Blechplatinen bekannt, welches gleichzeitig ein dichtes Andocken und ein Nachfließen der eingespannten Randbereiche der Doppelplatine in Richtung Formhohlraum ermöglicht. Hierzu sitzt im Oberteil des Werkzeugs verschieblich ein Träger für den Andockstempel, der mit einem Ansatz in einer fest im Oberteil sitzenden Führung nach Art einer Kulissenführung gehalten ist. Der Andockstempel, der ein konisches Mundstück und einen gegenüber der Stirnseite des konischen Mundstücks zurückversetzten Dichtungskragen aufweist, ist in dem Träger quer in Richtung der Einspannebene von Ober- und Unterwerkzeug vorschiebbar. Da der Andockstempel verschiebbar gelagert ist, bleiben beim Nachfließen von Material auch aus dem Bereich des Rands, wo der Andockstempel angedockt ist, die geometrischen Verhältnisse beim Nachfließen des Materials unverändert, so daß auch der dichtende Anschluß des Andockstempels erhalten bleibt. Hierbei erweist es sich als nachteilig, daß der Träger bzw. der Querandockstempel im Werkzeug selbst verschiebbar angeordnet ist, was eine entsprechende Aussparung im Werkzeug erforderlich macht. Gleichzeitig macht die bekannte Ausführung ein flexibles Verbindungsstück zwischen Druckquelle und mitbewegtem Andockstempel notwendig.DE 198 16 566 A1 describes a molding tool for after hydroforming components to be manufactured from two welded at the edges Known sheet metal boards, which simultaneously a tight docking and a reflow the clamped edge areas of the double blank in the direction of the mold cavity enables. For this purpose, a carrier is slidably seated in the upper part of the tool for the docking stamp, which has an attachment in a firmly seated in the upper part Guided tour is held as a backdrop tour. The docking stamp, the one conical mouthpiece and one opposite the face of the conical mouthpiece recessed sealing collar is in the carrier across The upper and lower tools can be pushed in the direction of the clamping plane. Since the Docking stamp is slidably mounted, remain when material flows also from the area of the edge where the docking stamp is docked, the geometric Conditions when the material flows in unchanged, so that the sealing connection of the docking stamp is also retained. Here it turns out it is disadvantageous that the carrier or the transverse docking punch in the tool itself is slidably arranged, which is a corresponding recess in Tool required. At the same time, the known design makes it flexible Connector between pressure source and moving docking stamp necessary.

Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgemäßes Formwerkzeug zu schaffen, das bei Überwindung der Nachteile aus dem Stand der Technik eine wirkungsvolle Mitführung der Zuführmittel für das Wirkmedium gewährleistet.The invention is therefore based on the object of a generic molding tool to create that while overcoming the disadvantages of the prior art ensures an effective carrying of the feed means for the active medium.

Diese Aufgabe wird mittels eines Formwerkzeugs mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausgestaltungen sind in den Unteransprüchen offenbart. This object is achieved by means of a molding tool with the features of the claim 1 solved. Preferred configurations are disclosed in the subclaims.

Hierzu wird vorgeschlagen, daß der in den Formhohlraum mündende Zuführmittelabschnitt zwecks seiner Verschiebbarkeit mindestens zwei Scheiben mit einer Exzenterverstellung durchdringt und die Exzenterverstellung derart gewählt ist, daß durch gegenläufige Drehrichtungen der Scheiben der Zuführmittelabschnitt einen geradlinigen Verschiebeweg zurücklegt. Damit wird gegenüber der Lösung, wie sie in der DE 198 16 566 A1 beschrieben ist, eine konstruktiv einfachere Realisierung eines mitlaufenden Zuführmittelsystems geschaffen.For this purpose, it is proposed that the feed means section opening into the mold cavity in order to move it, at least two disks with one Eccentric adjustment penetrates and the eccentric adjustment is selected such that the opposite direction of rotation of the discs of the feed section travels a straight line. Compared to the solution, as described in DE 198 16 566 A1, a structurally simpler implementation of a moving feed system.

Nach einer besonders bevorzugten Ausführungsform handelt es sich bei den beiden Scheiben mit Exzenterverstellung um eine um ihren Mittelpunkt rotierbare Innenscheibe, die in eine ebenfalls um ihren Mittelpunkt rotierbare Außenscheibe exzentrisch integriert ist. Der mit der Fließbewegung des Platinenmaterials mitführbare Zuführmittelabschnitt zum Einbringen des Wirkfluids durchdringt die Innenscheibe exzentrisch, die wiederum von der Außenscheibe aufgenommen wird. Wenn bei dem Umformvorgang das Platinenmaterial anfängt zu fließen, ist es dem in den Formhohlraum bzw. in den Zuführkanal mündenden Zuführmittelabschnitt möglich, durch gegenseitige Drehbewegung der rotierbaren Scheiben eine Bewegung quer in Richtung der Einspannebene zwischen Ober- und Unterwerkzeug mitzumachen. Bei einer bevorzugten Ausbildung entspricht der Durchmesser der Innenscheibe dem Radius der Außenscheibe.According to a particularly preferred embodiment, the two are Discs with eccentric adjustment around an inner disc that rotates around their center, in an outer disc that also rotates around its center is eccentrically integrated. The one that can be carried along with the flowing movement of the board material Feed means section for introducing the active fluid penetrates the inner pane eccentric, which in turn is taken up by the outer pane. If the sheet material starts to flow during the forming process, it is feed means section opening into the mold cavity or into the feed channel possible, a movement by mutual rotation of the rotatable discs across in the direction of the clamping plane between the upper and lower tool to participate. In a preferred embodiment, the diameter corresponds to Inner pane the radius of the outer pane.

Das Formwerkzeug wird vorteilhaft weitergebildet, indem die Zuführmittel neben dem in den Formhohlraum mündenden ersten Abschnitt einen zweiten, entweder das Ober- oder das Unterwerkzeug durchdringenden, festen Zuführmittelabschnitt umfassen, der in einen sich parallel zum Verschiebeweg erstreckenden Speisekanal einmündet, um den ersten Zuführmittelabschnitt entlang seines Verschiebeweges mit Wirkmittel zu versorgen. Auf diese Weise ist gewährleistet, daß der mitgenommene erste Zuführmittelabschnitt durch Verfahren entlang des Speisekanals stets mit Wirkfluid versorgt wird. The molding tool is advantageously further developed by the supply means next to the first section opening into the mold cavity, either the upper or lower tool penetrating fixed feed means section comprise, in a feed channel extending parallel to the displacement path opens out around the first feed means section along its displacement path to be supplied with active agents. In this way it is ensured that the entrained first feed means section by moving along the feed channel is always supplied with active fluid.

Im Gegensatz zu dem bekannten Träger-Prinzip nach Art einer Kulissenführung sind die vorgeschlagenen Mitnahmemittel ein weit mehr in das Werkzeug integrierter Bestandteil. Hierzu ist eine Aufnahmeplatte auf der Werkzeugseite vorgesehen, von der das Wirkfluid eintritt, die die beiden Exzenterscheiben aufnimmt. Der in den Formhohlraum mündende Zuführmittelabschnitt ist als axialer Kanal bzw. als Düse ausgebildet. Zur Gewährleistung eines dichten Verbundes zwischen der Öffnung in der Platine und dem axialen Kanal weist die Innenscheibe ein konisches Mündungsstück mit einem zurückversetzten Kragen auf, wobei das Mündungsstück den axialen Kanal mit Innenscheibe sowie mittelbar die Außenscheibe in der Platine verankert. Zudem weist das Formwerkzeug den Vorteil auf, daß beide Platinen stets mit dem Werkzeug in Berührung kommen, wodurch sich eine dadurch entstehende Kontaktreibung ausnutzen läßt.In contrast to the known carrier principle in the manner of a scenery guide the suggested driving means are far more integrated in the tool Component. For this purpose, a mounting plate is provided on the tool side, from which the active fluid enters, which receives the two eccentric discs. The feed means section opening into the mold cavity is an axial channel or designed as a nozzle. To ensure a tight bond between the opening in the board and the axial channel, the inner disc has a conical Muzzle piece with a recessed collar, the muzzle piece the axial channel with the inner pane and indirectly the outer pane anchored in the board. In addition, the molding tool has the advantage that both Boards always come into contact with the tool, which creates a thereby exploiting contact friction.

Beim Einlegen der Platinen in das Werkzeug wird die mit der Öffnung versehene Platine dicht auf einem entsprechend ausgebildeten Mündungsstück des in den sich später ausbildenden Zuführkanal mündenden Zuführmittelabschnitts plaziert und dieser Zuführmittelabschnitt durch gegenläufige Drehbewegung der beiden Scheiben in einer Exzenterverstellung zusammen mit dem fließenden Material mitgeführt, wobei er entlang des Verschiebeweges stets mit Wirkfluid versorgt wird. Einlege- und Andockphase fallen demgemäß zusammen.When the boards are inserted into the tool, the one with the opening is opened Circuit board tightly on a correspondingly designed mouthpiece in the placed later forming feed channel opening feeder section placed and this feed section by counter-rotating movement of the two Discs in an eccentric adjustment together with the flowing material carried along, whereby he always supplies active fluid along the displacement path becomes. The insertion and docking phases coincide accordingly.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung. Hierbei zeigen jeweils schematisch:

Figur 1
einen Ausschnitt eines Querschnitts eines Werkzeugs nach einer erfindungsgemäßen Ausführungsform mit in das Werkzeug eingelegten und eingespannten Blechplatinen kurz nach Beginn der Aufweitphase;
Figur 2
die Stellung der Mitnahmemittel des Werkzeugs in der Phase nach Figur 1;
Figur 3
den Ausschnitt eines Werkzeugs nach Figur 1 am Ende der Aufweitphase;
Figur 4
die Stellung der Mitnahmemittel des Werkzeugs in der Phase nach Figur 3;
Figur 5
ein Werkzeug im Querschnitt mit eingespannten Platinen mit einem feststehenden Andocksystem nach dem Stand der Technik.
Further details and advantages of the invention emerge from the claims and the following description. Each shows schematically:
Figure 1
a section of a cross section of a tool according to an embodiment of the invention with sheet metal plates inserted and clamped in the tool shortly after the start of the expansion phase;
Figure 2
the position of the driving means of the tool in the phase according to FIG. 1;
Figure 3
the section of a tool according to Figure 1 at the end of the expansion phase;
Figure 4
the position of the driving means of the tool in the phase according to FIG. 3;
Figure 5
a tool in cross section with clamped boards with a fixed docking system according to the prior art.

Das in Figur 1 ausschnittsweise dargestellte Werkzeug zum Innenhochdruck-Umformen setzt sich aus einem Ober- und Unterwerkzeug 1, 2 zusammen, die zwischen sich einen Formhohlraum ausbilden. Mit Hilfe von Figur 5, die einen Gesamtüberblick auf ein solches Werkzeug nach dem Stand der Technik gibt, soll das Innenhochdruckumformen beschrieben werden. Bekanntermaßen setzt es sich aus der Einlege-, der Andockphase, der Aufweitphase sowie der Kalibrierphase zusammen. Nachdem eine der beiden umzuformenden Platinen 3, 4 mit einer Öffnung versehen wurde, werden die beiden Platinen 3, 4 in das Werkzeug eingelegt und die beiden Werkzeugteile 1, 2 durch hier nicht dargestellte Führungs- und Preßvorrichtungen zusammengefahren, so daß die Platinen umlaufend in einem Randbereich eingeklemmt werden. Üblicherweise erfolgt dann das Andocken mit einem Andockstempel zum Einbringen des Wirkfluids, wobei der Andockstempel an die Öffnung der einen Platine angeschlossen wird. Das Wirkfluid tritt durch den Andockstempel unter Hochdruck ein und verdrängt die andere Platine in einen sich im Randbereich der Platinen aufweitenden Zuführkanal. Während dieser Aufweitphase weiten sich die Platinen im Formhohlraum auf, und es fließt Material aus den eingeklemmten Randbereichen in Richtung des Formhohlraums nach. Bei der sich anschließenden Kalibrierphase werden die Randbereiche fester eingeklemmt, und die Platinen werden - die Gravur des Werkzeugs annehmend - bis zur Fertigkontur weiter aufgeweitet.The tool shown in FIG. 1 for internal high pressure forming is composed of an upper and lower tool 1, 2, the form a mold cavity between them. With the help of Figure 5, which is an overall view on such a tool according to the prior art, should hydroforming are described. As is known, it sets consists of the insertion, the docking phase, the expansion phase and the calibration phase together. After one of the two boards 3, 4 to be formed with an opening has been provided, the two boards 3, 4 in the tool inserted and the two tool parts 1, 2 by guide not shown here and pressing devices moved together, so that the boards rotating be pinched in an edge area. The docking then usually takes place with a docking stamp for introducing the active fluid, the docking stamp is connected to the opening of one board. The active fluid enters through the docking stamp under high pressure and displaces the other board into a feed channel widening in the edge area of the boards. While During this expansion phase, the boards in the mold cavity expand, and it material flows from the pinched edge areas in the direction of the mold cavity to. In the subsequent calibration phase, the marginal areas more firmly clamped, and the blanks are - the engraving of the tool accepting - further widened to the finished contour.

Die Figur 1 stellt ein erfindungsgemäß weiterentwickeltes Formwerkzeug am Beginn der Aufweitphase mit einem mitlaufenden Zuführmittelsystem dar. Es umfaßt ein Ober- und ein Unterwerkzeug 1, 2, welche zwischen sich zwei Blechplatinen 3, 4 aufnehmen. Entlang des Unterwerkzeugs 2, an dem die Randbereiche der unteren Platine 4 zur Anlage kommen bzw. eingeklemmt werden, ist eine Aufnahmeplatte 5 vorgesehen. Diese nimmt eine äußere kreisförmige Scheibe 6, die um ihren Mittelpunkt rotierend angeordnet ist, auf. Exzentrisch zur Außenscheibe 6 ist eine kreisförmige Innenscheibe 7 mit im Verhältnis zur Außenscheibe 6 kleineren Durchmesser angeordnet. Quer zur Einspannebene der Platinen 3, 4 erstreckt sich eine Düse bzw. ein axialer Kanal 8 entlang der Innen- bzw. der Außenscheibe 7, 6. Die Innenscheibe 7 ist mit einem konischen Mundstück 9 am Mündungsbereich des axialen Kanals 8 versehen und weist entsprechend der Dicke der Platine in deren Ausgangsform einen Kragen 10 auf, der oben bündig mit der Platine 4 abschließt. Der axiale Kanal 8 weist auf der anderen Seite der Innenscheibe ein Ansatzstück 11 mit vergrößertem Durchmesser auf. In das Unterwerkzeug 2 des Werkzeugs ist ein Speise- bzw. Sammelkanal 12 eingearbeitet, der sich unterhalb der beiden Scheiben parallel zur Einspannebene der beiden Platinen erstreckt. Seine Ausdehnung ist durch den maximalen Durchmesser der Außenscheibe 6 begrenzt. Dieser Speisekanal 12, vorteilhaft als Nut ausgebildet, wird über einen Druckkanal 13, welcher durch das Unterwerkzeug führt, mit dem Wirkfluid, d.h. mit einer Druckflüssigkeit, gespeist (hier mit einem Pfeil angedeutet).FIG. 1 shows a molding tool developed according to the invention at the beginning the expansion phase with a moving feed system. It includes an upper and a lower tool 1, 2, which between them two sheet metal plates 3, Record 4. Along the lower tool 2, on which the edge areas of the lower Board 4 come to rest or are clamped, is a mounting plate 5 provided. This takes an outer circular disc 6 around it The center is arranged rotating. Is eccentric to the outer disc 6 a circular inner pane 7 with 6 smaller in relation to the outer pane Diameter arranged. Extends transversely to the clamping plane of the boards 3, 4 there is a nozzle or an axial channel 8 along the inner or outer pane 7, 6. The inner pane 7 is with a conical mouthpiece 9 at the mouth area of the axial channel 8 and has the thickness of the board in its initial form a collar 10 which is flush with the plate 4 at the top completes. The axial channel 8 has on the other side of the inner pane Extension 11 with an enlarged diameter. In the lower tool 2 of the Tool is a feed or collection channel 12 incorporated, which is below of the two disks extends parallel to the clamping plane of the two boards. Its expansion is due to the maximum diameter of the outer disk 6 limited. This feed channel 12, advantageously designed as a groove, is via a Pressure channel 13, which leads through the lower tool, with the active fluid, i.e. With a hydraulic fluid, fed (here indicated by an arrow).

Zur Durchführung des Verfahrens werden die Platinen 3, 4 in das Werkzeug eingelegt, wobei die Platine 4, die mit einer entsprechenden Öffnung versehen wurde, so eingelegt wird, daß das Mündungsstück 9 des axialen Kanals 8 bereits dicht in die Öffnung eingreift. Nach dieser Einlegephase, die bereits die Andockphase nach dem bekannten herkömmlichen Verfahren einschließt, wird die Aufweitphase durch Einleiten von Druckflüssigkeit eingeleitet. Hierbei weicht die zweite Platine 3 im oberen Werkzeug 1 in den Zuführkanal 14 aus. Aufgrund der zunehmenden Aufweitung der Platinen im Formhohlkörper fließt Material in Richtung Formhohlraum nach. Der axiale Kanal 8, der in der Öffnung der unteren Platine 4 fest verankert ist, wird durch die Fließbewegung mitgenommen und auf einem geradlinigen Weg durch die gegenläufige Drehbewegung der beiden Scheiben bewegt. Diese Bewegung und damit örtliche Verlagerung der Mitnahmemittel wird deutlich in den Figuren 2 und 4, in denen die Drehrichtungen der beiden Scheiben und die Bewegung des axialen Kanals durch entsprechende Pfeile dargestellt sind.To carry out the method, the blanks 3, 4 are inserted into the tool, the board 4, which has been provided with a corresponding opening, is inserted so that the mouthpiece 9 of the axial channel 8 already engages tightly in the opening. After this loading phase, which is already the docking phase according to the known conventional method, the expansion phase initiated by introducing hydraulic fluid. Here the gives way second board 3 in the upper tool 1 into the feed channel 14. Due to the increasing expansion of the blanks in the hollow mold body material flows in the direction Cavity after. The axial channel 8, which is in the opening of the lower board 4 is firmly anchored, is carried along by the flow movement and on one straight path through the opposite rotation of the two discs emotional. This movement and thus local relocation of the means of transport becomes clear in Figures 2 and 4, in which the directions of rotation of the two Disks and the movement of the axial channel shown by corresponding arrows are.

Durch den entlang der gesamten Mitnahmestrecke verlaufenden Sammelkanal 12 wird der axiale Kanal 8 stets mit Druckflüssigkeit versorgt. Figur 3 zeigt die Stellung der Mitnahmemittel (Scheiben 6, 7) am Ende der Aufweitphase, wobei sich der axiale Kanal in etwa am Ende seines Verschiebeweges befindet. Die Drehpunkte der beiden Schreiben (Außenscheibe 6, Innenscheibe 7) sind hier mit 15, 16 bezeichnet. Bei der gezeigten Ausführungsform bewegt sich die äußere Scheibe 6 stets um ihren Mittelpunkt 15, während sie die ebenfalls um ihren eigenen Mittelpunkt 16 rotierbare innere Scheibe 7 mitnimmt, wobei der axiale Kanal insgesamt eine geradlinige Bewegung zurücklegt. Die Rückwärtsbewegung des axialen Kanals erfolgt nach Entnahme des Bauteils aus dem Werkzeug durch Zurückstellen der Exzenterscheibenanordnung in ihre Ausgangslage.Through the collecting channel 12 running along the entire driving distance the axial channel 8 is always supplied with hydraulic fluid. Figure 3 shows the position of the entrainment means (discs 6, 7) at the end of the expansion phase, whereby the axial channel is located approximately at the end of its displacement. The pivots of the two letters (outer pane 6, inner pane 7) are here with 15, 16 designated. In the embodiment shown, the outer disc moves 6 always around their center 15, while they also around their own Center 16 rotatable inner disc 7 entrains, the axial channel as a whole a straight line movement. The backward movement of the axial channel takes place after removal of the component from the tool by resetting the eccentric disk arrangement in its starting position.

Es ist selbstverständlich, daß die Anordnung der Zuführmittel für das Wirkfluid bzw. die Mitnahmemittel nicht auf das Unterwerkzeug beschränkt sind; sie können selbstverständlich auch im Oberwerkzeug angeordnet sein. Insgesamt wird im Vergleich zu bekannten mitlaufenden Systemen zur Zuführung des Wirkfluids aufgrund der Ausbildung der Bewegungsmittel als Scheiben, die zueinander exzentrisch versetzt sind, eine störungsfrei arbeitende, in das Werkzeug integrierte Lösung geschaffen, die bereits mit Einlegen der Platinen den Verbund zwischen Platine und Zuführmitteln für das Wirkfluid erreicht und somit auf die Andockphase durch Querandocken eines Andockstempels verzichten kann.It goes without saying that the arrangement of the feed means for the active fluid or the driving means are not limited to the lower tool; you can can of course also be arranged in the upper tool. Overall, in Comparison to known concurrent systems for supplying the active fluid due to the formation of the movement means as disks that are eccentric to each other are a trouble-free solution integrated into the tool created the bond between the board by inserting the boards and feed means for the active fluid reached and thus on the docking phase can do without by docking a docking pad.

Claims (6)

Formwerkzeug für nach dem Innenhochdruck-Umformen herzustellende hohle Bauteile aus zwei Blechplatinen (3, 4), umfassend ein Ober- und ein Unterwerkzeug (1,2), welche einen Formhohlraum aufweisen, und zwischen denen die Blechplatinen an ihren Randbereichen einspannbar sind, mit einem Zuführmittel (8, 12, 13) für das Wirkmedium in den Formhohlraum, wobei das Zuführmittel im Werkzeug verschiebbar angeordnet ist und quer in Richtung der Einspannebene von Ober- und Unterwerkzeug durch Verbund mit einer in eine der beiden Platinen eingebrachten Öffnung durch das sich bei der Verformung mitfließende Material mitnehmbar ist,
dadurch gekennzeichnet, daß in das Ober- oder Unterwerkzeug (1, 2) mindestens zwei Scheiben mit einer Exzenterverstellung angeordnet sind, der in den Formhohlraum mündende Zuführmittelabschnitt (8) die Scheiben durchdringt und die Exzenterverstellung derart gewählt ist, daß durch gegenläufige Drehrichtungen der Scheiben der Zuführmittelabschnitt einen geradlinigen Verschiebeweg zurücklegt.Molding tool for hollow components to be produced after hydroforming from two sheet metal blanks (3, 4), comprising an upper and a lower die (1, 2), which have a mold cavity and between which the sheet metal blanks can be clamped at their edge areas, with one Feeding means (8, 12, 13) for the active medium in the mold cavity, the feeding means being arranged displaceably in the tool and transversely in the direction of the clamping plane of the upper and lower tools by connection with an opening made in one of the two plates through which the Deformation along with the flowing material is removable
characterized in that at least two disks with an eccentric adjustment are arranged in the upper or lower tool (1, 2), the feed means section (8) opening into the mold cavity penetrates the disks and the eccentric adjustment is selected in such a way that the counter directions of rotation of the disks Feed middle section covers a linear displacement path. Formwerkzeug nach Anspruch 1,
dadurch gekennzeichnet, daß der Zuführmittelabschnitt (8) exzentrisch eine um ihren Mittelpunkt rotierbare Innenscheibe (7) durchdringt und diese in eine, ebenfalls um ihren Mittelpunkt rotierbare Außenscheibe (6) exzentrisch integriert ist.Molding tool according to claim 1,
characterized in that the feed means section (8) eccentrically penetrates an inner disk (7) which is rotatable about its center and is eccentrically integrated in an outer disk (6) which is also rotatable about its center. Formwerkzeug nach Anspruch 2,
dadurch gekennzeichnet, daß der Durchmesser der Innenscheibe (7) in etwa dem Radius der Außenscheibe (6) entspricht.Molding tool according to claim 2,
characterized in that the diameter of the inner disc (7) corresponds approximately to the radius of the outer disc (6). Formwerkzeug nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Zuführmittel neben dem in den Formhohlraum mündenden ersten Abschnitt (8) einen zweiten, entweder das Ober- oder Unterwerkzeug durchdringenden, nicht verschiebbaren Zuführmittelabschnitt (13) umfassen, der in einen sich parallel zum Verschiebeweg erstreckenden Speisekanal (12) einmündet, um den ersten Zuführmittelabschnitt (8) entlang seines Verschiebeweges mit Wirkmittel zu versorgen.Molding tool according to one of claims 1 to 3,
characterized in that, in addition to the first section (8) opening into the mold cavity , the feed means comprise a second, non-displaceable feed means section (13) penetrating either the upper or lower tool and opening into a feed channel (12) extending parallel to the displacement path, in order to supply the first feed means section (8) with active agents along its displacement path. Formwerkzeug nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Innenscheibe (7) ein konisches Mündungsstück (9) mit einem zurückversetzten Kragen (10) aufweist, welches in die vorbereitete Öffnung in der den Zuführmitteln (8, 12, 13) zugewandten Platine (4) zwecks Schaffung eines dichten Verbundes passend eingreift.Molding tool according to one of claims 1 to 4,
characterized in that the inner disc (7) has a conical mouthpiece (9) with a recessed collar (10) which fits into the prepared opening in the circuit board (4) facing the feed means (8, 12, 13) in order to create a tight connection engages appropriately. Formwerkzeug nach einem der Ansprüche 1 bis 5,
gekennzeichnet durch eine Aufnahmeplatte (5) zwischen dem Unter- oder dem Oberwerkzeug und der unteren oder der oberen Platine, einen Kanal (13) als zweiten Zuführmittelabschnitt, der in das Unter- oder Oberwerkzeug eingebracht ist und in den Speisekanal (12) mündet, und eine Düse (8) als ersten Zuführmittelabschnitt, die entlang des Speisekanals mit der bei der Verformung fließenden Platine (4) mitnehmbar ist durch die gegenläufige Verdrehung der Innen- und Außenscheibe (7,6), die von der Aufnahmeplatte (5) aufgenommen werden.Molding tool according to one of claims 1 to 5,
characterized by a receiving plate (5) between the lower or the upper tool and the lower or the upper plate, a channel (13) as a second feed means section which is introduced into the lower or upper tool and opens into the feed channel (12), and a nozzle (8) as the first feed means section, which can be taken along the feed channel with the plate (4) flowing during the deformation due to the counter-rotation of the inner and outer disks (7, 6) which are received by the receiving plate (5).
EP01107667A 2000-03-31 2001-03-28 Hydroforming die for the production of a hollow workpiece from two metal sheets Expired - Lifetime EP1138409B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10016206A DE10016206C1 (en) 2000-03-31 2000-03-31 Forming tool for hollow components to be produced after hydroforming from two sheet metal blanks
DE10016206 2000-03-31

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EP1138409A1 true EP1138409A1 (en) 2001-10-04
EP1138409B1 EP1138409B1 (en) 2003-09-10

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EP (1) EP1138409B1 (en)
JP (1) JP2001300645A (en)
KR (1) KR20010095020A (en)
AT (1) ATE249295T1 (en)
DE (2) DE10016206C1 (en)
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EP1772207A1 (en) * 2005-10-05 2007-04-11 ThyssenKrupp Drauz Nothelfer GmbH Tool and method for manufacturing metal sheet elements provided with cavities
CN110935780A (en) * 2019-12-16 2020-03-31 长沙而道新能源科技有限公司 Internal high-pressure forming hydraulic machine

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EP2651579B1 (en) 2010-12-17 2021-06-23 Magna International Inc. Apparatus and method for forming shaped articles from plural sheet metal blanks

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US5692406A (en) * 1996-09-27 1997-12-02 Mcdonnell Douglas Corporation Gas inlet for a superplastic forming die and method of use
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DE19816566A1 (en) * 1998-04-15 1999-11-04 Thyssenkrupp Stahl Ag Internal high pressure forming tool for hollow body blanks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1772207A1 (en) * 2005-10-05 2007-04-11 ThyssenKrupp Drauz Nothelfer GmbH Tool and method for manufacturing metal sheet elements provided with cavities
CN110935780A (en) * 2019-12-16 2020-03-31 长沙而道新能源科技有限公司 Internal high-pressure forming hydraulic machine
CN110935780B (en) * 2019-12-16 2021-08-20 长沙而道新能源科技有限公司 Internal high-pressure forming hydraulic machine

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DE50100586D1 (en) 2003-10-16
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DE10016206C1 (en) 2001-10-04
EP1138409B1 (en) 2003-09-10
KR20010095020A (en) 2001-11-03
US20020000112A1 (en) 2002-01-03
ATE249295T1 (en) 2003-09-15
US6341515B2 (en) 2002-01-29

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