EP0665072A1 - Device for high pressure forming - Google Patents

Device for high pressure forming Download PDF

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Publication number
EP0665072A1
EP0665072A1 EP94113101A EP94113101A EP0665072A1 EP 0665072 A1 EP0665072 A1 EP 0665072A1 EP 94113101 A EP94113101 A EP 94113101A EP 94113101 A EP94113101 A EP 94113101A EP 0665072 A1 EP0665072 A1 EP 0665072A1
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EP
European Patent Office
Prior art keywords
tool
ring
cover
hooks
pot
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
EP94113101A
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German (de)
French (fr)
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EP0665072B1 (en
Inventor
Anton Bauer
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.)
ANTON BAUER WEKZEUG- UND MASCHINENBAU GMBH & CO. K
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Huber and Bauer GmbH
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Publication of EP0665072A1 publication Critical patent/EP0665072A1/en
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    • 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
    • B21D26/039—Means for controlling the clamping or opening of the moulds
    • 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
    • B21D26/047—Mould construction

Definitions

  • the invention relates to a device for hydroforming a, in particular tubular, blank made of ductile metal in a mold having a mold cavity, which has a lower part and a removable upper part, and a device for holding the lower part and the upper part together.
  • This device must absorb large forces, but on the other hand allow the upper part to be lifted off from the lower part in each manufacturing process, so that the workpiece can be inserted and removed.
  • the tool is therefore normally placed in a type of press frame and the upper part can be raised and lowered in it, like the upper punch of a press.
  • the invention has for its object to reduce this construction effort.
  • the said device has a bayonet lock with at least four hooks on a circumference enclosing the horizontal outline of the tool, which can be brought into and out of engagement by a ring which can be rotated relative to the tool, and with an introduction of force in the lower part and the upper part near their circumference.
  • the device is approximately pot-shaped and the tool is inserted into it; the ring is arranged on a lid of the pot connected to the upper part of the tool and can be rotated by hydraulic cylinders acting with tangential force components between the remaining lid and the ring, preferably by means of rockers articulated on the remaining lid and the ring with an approximately radial extension.
  • the ring it is entirely possible, for example, to arrange the ring on the lower part or the upper part of the tool itself and, for example, to have it gripped only behind teeth or the like arranged on the other part in each case.
  • Part-part solutions and transitional solutions between the pot and the direct design of the bayonet lock on the tool are also possible.
  • the bayonet catch has at least eight hooks, preferably an uninterrupted row of hooks at all, and preferably the device then transmits the force in a ring-shaped manner to the lower part and the upper part.
  • the annular or point-wise introduction of force close to the circumference allows force to be introduced further inside, for example the bottom of the lower part is supported over the entire surface and is pressed onto the top of the upper part over the entire surface.
  • the tool can also be smaller than the interior of the pot and also have a shape other than a circle, for example a rectangular, in particular a square.
  • a tool for the internal high pressure forming of a tubular blank 1 consists of a lower part 2 and an upper part 3, which adjoin one another in the horizontal sectional plane 4 of the blank 1.
  • the mold cavity 5 of the tool is shown schematically.
  • the tool is inserted into a pot 7 provided with a lid 6.
  • the side wall of the pot 7 has two recesses 12, through which pressure medium connections to the tubular blank 1 can be pushed.
  • a ring of teeth 14 is worked out on the inside of the pot wall by a circumferential milling 13.
  • the cover 6 consists of a cover plate 15 and a ring 16 enclosing it and projecting further downwards.
  • the two parts are connected to one another by a simple ring bearing (not shown).
  • the upper part 3 is attached to the cover plate 15.
  • the ring 16 is rotatable relative to the cover plate by three hydraulic cylinders 17 and three rockers 18: the rockers 18 are articulated on the cover plate 15 and on the ring 16 such that the connecting straight line between the two joints is approximately radially aligned on average, and the hydraulic cylinders 17 are articulated on the cover plate 15 and on the rocker arms 18 with an approximation of the tangential direction.
  • a ring of outwardly directed teeth 19 is formed, which move downward between the teeth 14 when the cover 6 is placed on the pot 7 and then pushed under the teeth 14 by rotating the ring 16 be, whereby a clamping force is created by inclined surfaces 20 on each of the two teeth 14, 19, with which the ring 16 presses on a flange-like shoulder 21 of the upper part 3.
  • FIG. 3 The arrangement described appears in FIG. 3 in a side view corresponding to the section according to FIG. 1, but largely covered and with modifications.
  • the base 8, the cylinder 10, the plunger plate 11, the pot 7 and the cover 6 can be roughly recognized.
  • the axes of the three inner joints of the rockers 18 are extended upwards as guide rods 22 and are displaceably guided through the upper beam of a frame 23 which is basically C-shaped and which represents the machine frame.
  • the piston rod of a lifting cylinder 24 mounted in the upper beam of the frame extends as a pull rod 25 to a fastening 26 on the cover 6.
  • the pressure medium connections that can be pushed forward to the tubular blank 1 are concealed. However, the relevant output and feed devices 27 and 28 are visible.
  • the tubular blank 1 is inserted in brackets on the underside of the lid 6 and the upper part 3.
  • the cover 6 with the upper part 3 hanging on it is then lowered by the lifting cylinder 24.
  • the teeth 19 on the ring 16 of the lid slide down between the teeth 14 on the pot 7.
  • the ring 16 is rotated by actuating the hydraulic cylinders 17.
  • the bayonet catch which is the construction, is locked and the upper part 3 is held together with the lower part 2.
  • the pressure medium connections are advanced and brought into connection with the tubular blank 1.
  • the blank is expanded and pressed against the wall of the mold cavity 5, which, as mentioned, is only shown schematically. This is how the shaped workpiece is created. After shaping, the processes described above are repeated in the reverse direction and sequence.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

The appts. for shaping a blank (1) (in partic., of tubular form) made of a ductile metal in a tool with a hollow space (5) comprises a bottom element (2) and a liftable top element (3) of this tool, as well as a mechanism (6,7, 13-21) for holding together the elements (2,3). The mechanism (6,7, 13-21) incorporates a bayonet fixing (13-20) with ≥ 4 hooking units (14,19) on a circumference enclosing a horizontal contour of the tool (2,3). These holding units are engageable disengageable by means of a ring (16) with its rotatable relative to the tool (2,3).

Description

Die Erfindung betrifft eine Vorrichtung zum Innenhochdruckumformen eines, insbesondere rohrförmigen, Rohlings aus duktilem Metall in einem einen Formhohlraum aufweisenden Werkzeug, das ein Unterteil und ein abhebbares Oberteil aufweist sowie eine Einrichtung, das Unterteil und das Oberteil zusammenzuhalten.The invention relates to a device for hydroforming a, in particular tubular, blank made of ductile metal in a mold having a mold cavity, which has a lower part and a removable upper part, and a device for holding the lower part and the upper part together.

Diese Einrichtung muß große Kräfte aufnehmen, andererseits jedoch bei jedem Fertigungsvorgang ein Abheben des Oberteils vom Unterteil erlauben, damit das Werkstück eingelegt und herausgenommen werden kann. Man setzt daher normalerweise das Werkzeug in eine Art Pressengestell und ordnet das Oberteil darin heb- und senkbar, wie den Oberstempel einer Presse, an.
Der Erfindung liegt die Aufgabe zugrunde, diesen baulichen Aufwand zu vermindern.This device must absorb large forces, but on the other hand allow the upper part to be lifted off from the lower part in each manufacturing process, so that the workpiece can be inserted and removed. The tool is therefore normally placed in a type of press frame and the upper part can be raised and lowered in it, like the upper punch of a press.
The invention has for its object to reduce this construction effort.

Gemäß der Erfindung wird dieser Zweck dadurch erfüllt, daß die genannte Einrichtung einen Bajonettverschluß aufweist mit mindestens vier Verhakungen auf einem den waagerechten Umriß des Werkzeuges einschließenden Kreisumfang, die durch einen gegenüber dem Werkzeug verdrehbaren Ring in und außer Eingriff zu bringen sind, und mit einer Krafteinleitung in das Unterteil und das Oberteil nahe deren Umfang.According to the invention, this purpose is achieved in that the said device has a bayonet lock with at least four hooks on a circumference enclosing the horizontal outline of the tool, which can be brought into and out of engagement by a ring which can be rotated relative to the tool, and with an introduction of force in the lower part and the upper part near their circumference.

Bei dieser Lösung werden die Kräfte nicht durch das zum Heben und Senken des Oberteils des Werkzeugs weiterhin erforderliche Gestell aufgenommen, sondern unmittelbar an dem Werkzeug zwischen Unterteil und Oberteil ausgeglichen. Mit dem verdrehbaren Ring läßt sich das Öffnen und Schließen der Preßform verhältnismäßig einfach und schnell bewerkstelligen.In this solution, the forces are not absorbed by the frame which is still required for lifting and lowering the upper part of the tool, but are compensated directly on the tool between the lower part and the upper part. With the rotatable ring, the opening and closing of the mold can be accomplished relatively easily and quickly.

Dieses Prinzip läßt sich auf verschiedenste Weise verwirklichen.
Nach bevorzugter Ausgestaltung der Erfindung ist die Einrichtung etwa topfförmig ausgebildet und das Werkzeug in sie eingesetzt; der Ring ist an einem mit dem Oberteil des Werkzeugs verbundenen Deckel des Topfes angeordnet und durch mit tangentialer Kraftkomponente zwischen dem übrigen Deckel und dem Ring wirkende Hydraulikzylinder verdrehbar, vorzugsweise über an dem übrigen Deckel und dem Ring mit etwa radialer Erstreckung angelenkte Schwingen.
Es ist jedoch durchaus möglich, beispielsweise den Ring an dem Unterteil oder dem Oberteil des Werkzeugs selbst anzuordnen und beispielsweise nur hinter am jeweils anderen Teil als Kranz angeordnete Zähne o.a. greifen zu lassen.
Auch teils-teils-Lösungen und Übergangslösungen zwischen dem Topf und der unmittelbaren Gestaltung des Bajonettverschlußes an dem Werkzeug sind möglich.This principle can be implemented in many different ways.
According to a preferred embodiment of the invention, the device is approximately pot-shaped and the tool is inserted into it; the ring is arranged on a lid of the pot connected to the upper part of the tool and can be rotated by hydraulic cylinders acting with tangential force components between the remaining lid and the ring, preferably by means of rockers articulated on the remaining lid and the ring with an approximately radial extension.
However, it is entirely possible, for example, to arrange the ring on the lower part or the upper part of the tool itself and, for example, to have it gripped only behind teeth or the like arranged on the other part in each case.
Part-part solutions and transitional solutions between the pot and the direct design of the bayonet lock on the tool are also possible.

Die Krafteinleitung in das Unterteil und das Oberteil nahe deren Umfang und an mindestens vier Stellen ist nötig, um das Werkzeug sicher geschlossen zu halten, das sich beispielsweise zwischen nur zwei einander gegenüberliegenden Verbindungen aufbiegen würde. Bevorzugt weist der Bajonettverschluß jedoch mindestens acht Verhakungen, am besten überhaupt eine ununterbrochene Reihe von Verhakungen auf, und vorzugsweise überträgt die Einrichtung dann die Kraft in das Unterteil und das Oberteil durchgehend ringförmig.
Die ringförmige oder punktweise Krafteinleitung nahe dem Umfang läßt es aber zu, daß auch weiter innen eine Krafteinleitung erfolgt, beispielsweise also der Boden des Unterteils vollflächig unterstützt ist und auf die Oberseite des Oberteils vollflächig gedrückt wird.
Insbesondere (aber nicht ausschließlich) dann kann das Werkzeug auch kleiner sein als der Innenraum des Topfes und auch eine andere als die Kreisform haben, beispielsweise eine rechteckige, insbesondere eine quadratische.The introduction of force into the lower part and the upper part close to their circumference and at least four points is necessary in order to keep the tool securely closed, which would bend, for example, between only two mutually opposite connections. Preferably, however, the bayonet catch has at least eight hooks, preferably an uninterrupted row of hooks at all, and preferably the device then transmits the force in a ring-shaped manner to the lower part and the upper part.
The annular or point-wise introduction of force close to the circumference, however, allows force to be introduced further inside, for example the bottom of the lower part is supported over the entire surface and is pressed onto the top of the upper part over the entire surface.
In particular (but not exclusively) then the tool can also be smaller than the interior of the pot and also have a shape other than a circle, for example a rectangular, in particular a square.

Weitere Maßnahmen, die zur vorteilhaften Ausgestaltung der Erfindung dienen können, sind in der folgenden Beschreibung eines Ausführungsbeispiels angeführt.Further measures that can be used for the advantageous embodiment of the invention are listed in the following description of an exemplary embodiment.

Die Zeichnungen geben das Ausführungsbeispiel wieder.

Fig. 1
zeigt einen senkrechten Schnitt durch ein Werkzeug und eine Einrichtung, das Unterteil und das Oberteil des Werkzeugs zusammenzuhalten,
Fig. 2
zeigt eine Draufsicht auf die Anordnung nach Fig. 1 und
Fig. 3
zeigt die Gesamtanordnung des Werkzeugs und der Einrichtung in einem Gestell in Seitenansicht.
The drawings show the exemplary embodiment.
Fig. 1
shows a vertical section through a tool and a device for holding the lower part and the upper part of the tool together,
Fig. 2
shows a plan view of the arrangement of FIGS. 1 and
Fig. 3
shows the overall arrangement of the tool and the device in a frame in side view.

Ein Werkzeug zum Innenhochdruckumformen eines rohrförmigen Rohlings 1 besteht aus einem Unterteil 2 und einem Oberteil 3, die in der waagerechten Schnittebene 4 des Rohlings 1 aneinanderschließen. Der Formhohlraum 5 des Werkzeuges ist schematisiert dargestellt.A tool for the internal high pressure forming of a tubular blank 1 consists of a lower part 2 and an upper part 3, which adjoin one another in the horizontal sectional plane 4 of the blank 1. The mold cavity 5 of the tool is shown schematically.

Das Werkzeug ist eingesetzt in einen mit einem Deckel 6 versehenen Topf 7.The tool is inserted into a pot 7 provided with a lid 6.

Der auf einem ringförmigen Unterbau 8 stehende Topf 7 untergreift das Unterteil 2 mit einem nur ringförmigen Topfboden 9. In dem somit vorhandenen Hohlraum unter dem Unterteil 2 ist eine durch einen Zylinder 10 heb- und senkbare Stößelplatte 11 angeordnet, die die Anordnung von in das Werkzeug hineinwirkenden Stößeln erlaubt (nicht dargestellt), etwa um nach der Hochdruckumformung eine Einsenkung in das Werkstück zu drücken oder einen Hohlraum zur Formung eines Stutzens während der Hochdruckeinwirkung langsam freizugeben o.a..
In der Verlängerung des rohrförmigen Rohlings 1 weist die Seitenwand des Topfes 7 zwei Ausnehmungen 12 auf, durch die hindurch Druckmittelanschlüsse an den rohrförmigen Rohling 1 vorgeschoben werden können.
Oben ist an der Innenseite der Topfwandung durch eine umlaufende Einfräsung 13 ein Kranz von Zähnen 14 herausgearbeitet.The pot 7 standing on an annular substructure 8 engages under the lower part 2 with an only annular pot bottom 9. In the cavity thus present under the lower part 2, a plunger plate 11, which can be raised and lowered by a cylinder 10, is arranged, which arranges the tool Incoming tappets are allowed (not shown), for example in order to press a depression into the workpiece after the high pressure forming or to slowly open a cavity for forming a nozzle during the high pressure action or the like.
In the extension of the tubular blank 1, the side wall of the pot 7 has two recesses 12, through which pressure medium connections to the tubular blank 1 can be pushed.
A ring of teeth 14 is worked out on the inside of the pot wall by a circumferential milling 13.

Der Deckel 6 besteht aus einer Deckelplatte 15 und einem diese einschließenden und weiter nach unten ragenden Ring 16. Die beiden Teile sind durch ein nicht dargestelltes, einfaches Ringlager miteinander verbunden. Das Oberteil 3 ist an der Deckelplatte 15 befestigt.
Der Ring 16 ist gegenüber der Deckelplatte verdrehbar durch drei Hydraulikzylinder 17 und drei Schwingen 18: Die Schwingen 18 sind an der Deckelplatte 15 sowie an dem Ring 16 so angelenkt, daß die Verbindungsgerade zwischen den beiden Gelenken im Mittel etwa radial ausgerichtet ist, und die Hydraulikzylinder 17 sind mit einer der Tangentialrichtung möglichst angenäherten Ausrichtung an der Deckelplatte 15 und an den Schwingen 18 angelenkt.The cover 6 consists of a cover plate 15 and a ring 16 enclosing it and projecting further downwards. The two parts are connected to one another by a simple ring bearing (not shown). The upper part 3 is attached to the cover plate 15.
The ring 16 is rotatable relative to the cover plate by three hydraulic cylinders 17 and three rockers 18: the rockers 18 are articulated on the cover plate 15 and on the ring 16 such that the connecting straight line between the two joints is approximately radially aligned on average, and the hydraulic cylinders 17 are articulated on the cover plate 15 and on the rocker arms 18 with an approximation of the tangential direction.

An dem nach unten sich erstreckenden Abschnitt des Ringes 16 ist ein Kranz nach außen gerichteter Zähne 19 angeformt, die sich beim Aufsetzen des Deckels 6 auf den Topf 7 zwischen dessen Zähnen 14 nach unten bewegen und dann durch Verdrehen des Ringes 16 unter die Zähne 14 geschoben werden, wobei durch Schrägflächen 20 an jeweils beiden Zähnen 14,19 eine Klemmkraft entsteht, mit der der Ring 16 auf einen flanschartigen Absatz 21 des Oberteils 3 drückt.On the downwardly extending portion of the ring 16, a ring of outwardly directed teeth 19 is formed, which move downward between the teeth 14 when the cover 6 is placed on the pot 7 and then pushed under the teeth 14 by rotating the ring 16 be, whereby a clamping force is created by inclined surfaces 20 on each of the two teeth 14, 19, with which the ring 16 presses on a flange-like shoulder 21 of the upper part 3.

Auf diese Weise werden das Unterteil 2 und das Oberteil 3 des Werkzeuges aneinandergepreßt und zusammengehalten.
Die Stellkräfte für die Verriegelung werden innerhalb der Einheit Topf/Deckel/Werkzeug ausgeglichen.
Der Ring 16 könnte auch mit der Deckelplatte 15 starr verbunden sein. Dann müßte diese aber gleichfalls gegenüber dem Oberteil 3 verdreht werden.In this way, the lower part 2 and the upper part 3 of the tool are pressed together and held together.
The actuating forces for locking are balanced within the pot / lid / tool unit.
The ring 16 could also be rigidly connected to the cover plate 15. Then this would also have to be rotated relative to the upper part 3.

Die beschriebene Anordnung erscheint in Fig. 3 in einer dem Schnitt gemäß Fig. 1 entsprechenden Seitenansicht, jedoch weitgehend verdeckt und mit Abwandlungen. In etwa zu erkennen sind der Unterbau 8, der Zylinder 10, die Stößelplatte 11, der Topf 7 und der Deckel 6.
Die Achsen der drei inneren Gelenke der Schwingen 18 sind als Führungsstangen 22 nach oben verlängert und durch den oberen Balken eines im Prinzip C-förmigen Gestelles 23 verschieblich hindurchgeführt, das den Maschinenrahmen darstellt. In der Mitte dazwischen erstreckt sich die Kolbenstange eines in dem oberen Balken des Gestelles angebrachten Hubzylinders 24 als Zugstange 25 zu einer Befestigung 26 an dem Deckel 6.
Die erwähnten zu dem rohrförmigen Rohling 1 vorschiebbaren Druckmittelanschlüsse liegen verdeckt. Sichtbar sind jedoch die betreffenden Ausgangs- und Vorschubeinrichtungen 27 und 28.The arrangement described appears in FIG. 3 in a side view corresponding to the section according to FIG. 1, but largely covered and with modifications. The base 8, the cylinder 10, the plunger plate 11, the pot 7 and the cover 6 can be roughly recognized.
The axes of the three inner joints of the rockers 18 are extended upwards as guide rods 22 and are displaceably guided through the upper beam of a frame 23 which is basically C-shaped and which represents the machine frame. In the middle in between, the piston rod of a lifting cylinder 24 mounted in the upper beam of the frame extends as a pull rod 25 to a fastening 26 on the cover 6.
The pressure medium connections that can be pushed forward to the tubular blank 1 are concealed. However, the relevant output and feed devices 27 and 28 are visible.

Der rohrförmige Rohling 1 wird jeweils bei angehobenem Deckel 6 und Oberteil 3 an dessen Unterseite in Klammern eingesetzt. Der Deckel 6 mit dem an ihm hängenden Oberteil 3 wird dann durch den Hubzylinder 24 abgesenkt. Die Zähne 19 am Ring 16 des Deckels gleiten zwischen den Zähnen 14 an dem Topf 7 hindurch nach unten.
Nach Aufsetzen des Oberteils 3 auf dem Unterteil 2 wird durch Betätigen der Hydraulikzylinder 17 der Ring 16 verdreht. In der bereits angegebenen Weise wird dadurch der Bajonettverschluß, den die Konstruktion darstellt, verriegelt und das Oberteil 3 mit dem Unterteil 2 zusammengehalten. Die Druckmittelanschlüsse werden vorgeschoben und in Verbindung mit dem rohrförmigen Rohling 1 gebracht. Durch Einpressen von Hydraulikflüssigkeit mit am Ende z.B. 6000 bar wird der Rohling aufgeweitet und an die Wand des, wie gesagt, nur schematisch dargestellten Formhohlraumes 5 gepreßt. So entsteht das geformte Werkstück.
Nach der Formgebung wiederholen sich die oben beschriebenen Abläufe in umgekehrter Richtung und Reihenfolge.The tubular blank 1 is inserted in brackets on the underside of the lid 6 and the upper part 3. The cover 6 with the upper part 3 hanging on it is then lowered by the lifting cylinder 24. The teeth 19 on the ring 16 of the lid slide down between the teeth 14 on the pot 7.
After placing the upper part 3 on the lower part 2, the ring 16 is rotated by actuating the hydraulic cylinders 17. In the manner already indicated, the bayonet catch, which is the construction, is locked and the upper part 3 is held together with the lower part 2. The pressure medium connections are advanced and brought into connection with the tubular blank 1. By pressing in hydraulic fluid at the end, for example 6000 bar, the blank is expanded and pressed against the wall of the mold cavity 5, which, as mentioned, is only shown schematically. This is how the shaped workpiece is created.
After shaping, the processes described above are repeated in the reverse direction and sequence.

Claims (9)

Vorrichtung zum Innenhochdruckumformen eines, insbesondere rohrförmigen, Rohlings (1) aus duktilem Metall in einem einen Formhohlraum (5) aufweisenden Werkzeug, das ein Unterteil (2) und ein abhebbares Oberteil (3) aufweist sowie eine Einrichtung (6,7,13-21), das Unterteil (2) und das Oberteil (3) zusammenzuhalten,
dadurch gekennzeichnet,
daß die genannte Einrichtung (6,7,13-21) einen Bajonettverschluß (13-20) aufweist mit mindestens vier Verhakungen (14,19) auf einem den waagerechten Umriß des Werkzeuges (2,3) einschließenden Kreisumfang, die durch einen gegenüber dem Werkzeug (2,3) verdrehbaren Ring (16) in und außer Eingriff zu bringen sind, und mit einer Krafteinleitung in das Unterteil (2) und das Oberteil (3) nahe deren Umfang.Device for internal high-pressure forming of a, in particular tubular, blank (1) made of ductile metal in a tool having a mold cavity (5), which has a lower part (2) and a removable upper part (3) and a device (6, 7, 13-21 ) to hold the lower part (2) and the upper part (3) together,
characterized,
that said device (6, 7, 13-21) has a bayonet lock (13-20) with at least four hooks (14, 19) on a circumference enclosing the horizontal outline of the tool (2, 3), which is defined by an opposite to the Tool (2,3) rotatable ring (16) are brought into and out of engagement, and with a force transmission into the lower part (2) and the upper part (3) near their circumference. Vorrichtung nach Anspruch 1,
gekennzeichnet durch eine ringförmige Krafteinleitung (9 bzw. 21) in das Unterteil (2) und das Oberteil (3).Device according to claim 1,
characterized by an annular introduction of force (9 or 21) into the lower part (2) and the upper part (3). Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die genannte Einrichtung (6,7,13-21) etwa topfförmig (7) ausgebildet und das Werkzeug (2,3) in sie eingesetzt ist.Device according to claim 1 or 2,
characterized,
that said device (6,7,13-21) is approximately cup-shaped (7) and the tool (2,3) is inserted into it. Vorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß der genannte Ring (16) an einem auf dem Oberteil (3) des Werkzeugs angebrachten Deckel (6) angeordnet ist und durch mit tangentialer Kraftkomponente zwischen dem übrigen Deckel (15) und dem Ring (16) wirkende Hydraulikzylinder (17) verdrehbar ist, vorzugsweise über an dem übrigen Deckel (15) und dem Ring (16) mit etwa radialer Erstreckung angelenkte Schwingen (18).Device according to one of claims 1 to 3,
characterized,
that said ring (16) is arranged on a cover (6) attached to the upper part (3) of the tool and can be rotated by hydraulic cylinders (17) acting with tangential force components between the remaining cover (15) and the ring (16), preferably via rockers (18) articulated on the remaining cover (15) and the ring (16) with an approximately radial extension. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß der Ring (16) unmittelbar auf das Oberteil (3) drückt, vorzugsweise an einem flanschartigen Absatz (21) des Oberteils (3).Device according to claim 4,
characterized,
that the ring (16) presses directly on the upper part (3), preferably on a flange-like shoulder (21) of the upper part (3). Vorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß der Bajonettverschluß (13-20) mindestens acht Verhakungen (14,19), vorzugsweise eine ununterbrochene Reihe von Verhakungen (14,19), aufweist.Device according to one of claims 1 to 5,
characterized,
that the bayonet catch (13-20) has at least eight hooks (14, 19), preferably an uninterrupted row of hooks (14, 19). Vorrichtung nach einem der Ansprüche 3 bis 6,
dadurch gekennzeichnet,
daß der Ring (16) mit radial nach außen stehenden Zähnen (19) unter Gegenstücke (14) an der Seitenwand des Topfes (7) greift.Device according to one of claims 3 to 6,
characterized,
that the ring (16) engages with radially outward teeth (19) under counterparts (14) on the side wall of the pot (7). Vorrichtung nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet,
daß der Deckel (6) in einem Gestell (23) durch eine Stangenführung (22) und eine, vorzugsweise hydraulisch betätigte, Zugstange (25) gehalten ist.Device according to one of claims 4 to 7,
characterized,
that the cover (6) is held in a frame (23) by a rod guide (22) and a, preferably hydraulically operated, pull rod (25). Vorrichtung nach einem der Ansprüche 3 bis 8,
dadurch gekennzeichnet,
daß das Werkstück (1) in Klammern an dem Oberteil (3) des Werkzeugs gehalten ist.Device according to one of claims 3 to 8,
characterized,
that the workpiece (1) is held in brackets on the upper part (3) of the tool.
EP94113101A 1994-01-29 1994-08-23 Device for high pressure forming Expired - Lifetime EP0665072B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4402674A DE4402674A1 (en) 1994-01-29 1994-01-29 Device for hydroforming
DE4402674 1994-01-29

Publications (2)

Publication Number Publication Date
EP0665072A1 true EP0665072A1 (en) 1995-08-02
EP0665072B1 EP0665072B1 (en) 1998-12-09

Family

ID=6508992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113101A Expired - Lifetime EP0665072B1 (en) 1994-01-29 1994-08-23 Device for high pressure forming

Country Status (5)

Country Link
US (1) US5570602A (en)
EP (1) EP0665072B1 (en)
JP (1) JP3709894B2 (en)
AT (1) ATE174236T1 (en)
DE (2) DE4402674A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3995281B2 (en) * 1995-11-15 2007-10-24 臼井国際産業株式会社 Fuel injection pipe for diesel engine and manufacturing method thereof
DE19602490C2 (en) * 1996-01-25 2002-07-18 Huber & Bauer Gmbh Device for hydroforming
DE19705243A1 (en) 1997-02-12 1998-08-13 Huber & Bauer Gmbh Clamping device for hydroforming tool
DE10109232C2 (en) * 2001-02-26 2003-04-03 Konrad Schnupp Locking device for a forming press
DE10306161B4 (en) * 2003-02-14 2005-02-17 Daimlerchrysler Ag Device for hydroforming workpieces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR342356A (en) * 1904-04-15 1904-09-06 Carl Proett Hydraulic press
FR1370852A (en) * 1963-07-19 1964-08-28 E Mabille Ets Monobloc metal ammunition box with external bosses obtained by hydraulic expansion
DE2707152A1 (en) * 1977-02-18 1978-08-24 Inst Gidrodinamiki Sibirskogo Steel chamber for explosive forming of workpieces - has sliding carriage to support article and explosive charge (CS 30.4.78)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2344779A (en) * 1941-08-27 1944-03-21 Hayes Mfg Corp Machine for making hollow bodies
US3005431A (en) * 1955-11-10 1961-10-24 Svenska Aeroplan Ab Hydraulic press
US3391559A (en) * 1965-11-10 1968-07-09 Mc Donnell Douglas Corp Diaphragm type hydraulic press
US4305270A (en) * 1979-11-13 1981-12-15 Kokovikhin Evgeny A Hydrostatic pressing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR342356A (en) * 1904-04-15 1904-09-06 Carl Proett Hydraulic press
FR1370852A (en) * 1963-07-19 1964-08-28 E Mabille Ets Monobloc metal ammunition box with external bosses obtained by hydraulic expansion
DE2707152A1 (en) * 1977-02-18 1978-08-24 Inst Gidrodinamiki Sibirskogo Steel chamber for explosive forming of workpieces - has sliding carriage to support article and explosive charge (CS 30.4.78)

Also Published As

Publication number Publication date
US5570602A (en) 1996-11-05
DE59407444D1 (en) 1999-01-21
EP0665072B1 (en) 1998-12-09
JPH07214187A (en) 1995-08-15
DE4402674A1 (en) 1995-08-03
ATE174236T1 (en) 1998-12-15
JP3709894B2 (en) 2005-10-26

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