EP0629456B1 - Apparatus for making hollow products - Google Patents

Apparatus for making hollow products Download PDF

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Publication number
EP0629456B1
EP0629456B1 EP94104469A EP94104469A EP0629456B1 EP 0629456 B1 EP0629456 B1 EP 0629456B1 EP 94104469 A EP94104469 A EP 94104469A EP 94104469 A EP94104469 A EP 94104469A EP 0629456 B1 EP0629456 B1 EP 0629456B1
Authority
EP
European Patent Office
Prior art keywords
guide means
joint heads
longitudinal guide
hydraulic cylinder
cylinder piston
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
EP94104469A
Other languages
German (de)
French (fr)
Other versions
EP0629456A1 (en
Inventor
August Wilhelm Schäfer
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.)
Schaefer Hydroforming & Co GmbH
Original Assignee
Schafer Hydroforming & Co GmbH
Schuler Hydroforming GmbH and Co KG
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 Schafer Hydroforming & Co GmbH, Schuler Hydroforming GmbH and Co KG filed Critical Schafer Hydroforming & Co GmbH
Publication of EP0629456A1 publication Critical patent/EP0629456A1/en
Application granted granted Critical
Publication of EP0629456B1 publication Critical patent/EP0629456B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D26/043—Means for controlling the axial pusher
    • 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 device for producing hollow bodies by shaping a tube using the internal high-pressure process, with a plurality of shaping tappets, each of the shaping tappets being provided on the free axially movable end of an associated hydraulic cylinder piston arrangement and at least one of the shaping tappets being provided with a pressure medium supply.
  • the invention has for its object to construct a device of the type mentioned so that as few parts of the tool assembly have to be replaced to produce different hollow bodies.
  • the solution to this problem according to the invention is that the shaping plungers are adjustable relative to one another with respect to the axis of action and the point of application in space.
  • the advantage achieved by the invention is that the forming rams can be used for the production of several hollow bodies due to the practically arbitrary spatial adjustability, so that only the remaining parts of the tool arrangement have to be replaced.
  • the device according to the invention can thus be converted much more quickly, so that the hollow bodies can also be produced more cost-effectively.
  • the hydraulic cylinder piston arrangements can be pivoted in rod ends, the rod ends can be adjusted in parallel longitudinal guides and the longitudinal guides can be pivoted on a circular guide orthogonal to the longitudinal guides about their central axis.
  • the joint heads will advantageously be designed as ball joint heads.
  • Pocket sets are particularly suitable for the longitudinal guides.
  • the device shown in the figures is used to produce hollow bodies by cold forming a metallic tube using the internal high-pressure process.
  • the device has a press frame 1, which is only indicated, and a tool arrangement 2.
  • This includes several, in the exemplary embodiment two forming plungers 3.
  • the two-part tool arrangement parts located between the forming plungers 3 and having the final shape of the hollow body to be produced are not shown in detail.
  • Each of the shaping tappets 3 is provided on the free axially movable end of an associated hydraulic cylinder piston arrangement 4.
  • At least one of the shaping tappets is provided with a pressure medium supply, via which a pressure medium can be introduced into the interior of the tube to be cold-formed.
  • the shaping plungers 3 can be adjusted more or less freely in space with respect to the axis of action and the point of application.
  • the hydraulic cylinder piston assemblies 4 are pivotally mounted in joint heads 5; this pivotability is indicated by the double arrows A.
  • the rod ends 5 are adjustable in parallel vertical longitudinal guides 6; this is illustrated by the double arrows B.
  • the longitudinal guides 6 still mounted on an orthogonal to the longitudinal guides 6, ie horizontal circular guide 7 about its vertical central axis 8; this is illustrated by the double arrows C.
  • the double arrow D illustrates that the point of application of the shaping plunger 3 can be adjusted in the longitudinal direction of the hydraulic cylinder piston arrangement 4.
  • the joint heads 5 are designed as ball joint heads and the longitudinal guides 6 as pocket sets.
  • the arrangement is such that the longitudinal adjustment of the hydraulic cylinder piston assembly (4), the circular guide (7), the rod ends (5) and the longitudinal guides (6) are each independently adjustable.
  • the parts of the tool arrangement lying between the shaping plungers 3 are removed, and the shaping plungers 3 are brought into the position required for producing the new hollow body.
  • the tool parts assigned to the new hollow body are then attached between the forming plungers 3.
  • the device is shown with two forming rams 3. It goes without saying that, depending on the hollow body to be produced, more than two shaping rams 3 can also be provided.

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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)
  • Forging (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Automatic Assembly (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen von Hohlkörpern durch Umformen eines Rohres nach dem Innenhochdruckverfahren, mit mehreren Umformstößeln, wobei jeder der Umformstößel am freien axial beweglichen Ende einer zugeordneten Hydraulikzylinderkolbenanordnung vorgesehen ist und zumindest einer der Umformstößel mit einer Druckmittelzuführung versehen ist.The invention relates to a device for producing hollow bodies by shaping a tube using the internal high-pressure process, with a plurality of shaping tappets, each of the shaping tappets being provided on the free axially movable end of an associated hydraulic cylinder piston arrangement and at least one of the shaping tappets being provided with a pressure medium supply.

Beim Innenhochdruckverfahren (vgl. Industrie-Anzeiger, 88. Jg. Nr. 37 vom 10. Mai 1966, Seiten 769 bis 772 und Nr. 48 vom 17. Juni 1966, Seiten 1001 bis 1004) wird regelmäßig ein Rohr in eine die Form des herzustellenden Hohlkörpers aufweisende Werkzeuganordnung eingelegt und mit Hilfe eines in das Innere des Rohres eingeleiteten Fluids aufgeweitet bzw. kalt umgeformt. Die Umformstößel sind Teil dieser Werkzeuganordnung. Zum Herstellen unterschiedlicher Hohlkörper hat man bisher stets die gesamte Werkzeuganordnung einschließlich der Umformstößel ausgewechselt, was verhältnismäßig aufwendig ist.In the case of the internal high-pressure process (cf. Industrie-Anzeiger, 88th vol. No. 37 from May 10, 1966, pages 769 to 772 and No. 48 from June 17, 1966, pages 1001 to 1004), a tube is regularly inserted into the shape of the Tool assembly to be produced inserted and expanded or cold-formed with the aid of a fluid introduced into the interior of the tube. The forming rams are part of this tool arrangement. To produce different hollow bodies, the entire tool arrangement, including the shaping plunger, has always been replaced, which is relatively complex.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so aufzubauen, daß zum Herstellen unterschiedlicher Hohlkörper möglichst wenig Teile der Werkzeuganordnung ausgewechselt werden müssen.The invention has for its object to construct a device of the type mentioned so that as few parts of the tool assembly have to be replaced to produce different hollow bodies.

Die erfindungsgemäße Lösung dieser Aufgabe besteht darin, daß die Umformstößel relativ zueinander bezüglich Wirkungsachse und Angriffspunkt im Raum einstellbar sind.The solution to this problem according to the invention is that the shaping plungers are adjustable relative to one another with respect to the axis of action and the point of application in space.

Der durch die Erfindung erreichte Vorteil besteht darin, daß die Umformstößel zufolge der praktisch beliebigen räumlichen Einstellbarkeit für die Herstellung mehrerer Hohlkörper eingesetzt werden können, so daß nur noch die verbleibenden Teile der Werkzeuganordnung ausgewechselt werden müssen. Die erfindungsgemäße Vorrichtung ist damit wesentlich schneller umrüstbar, damit sind auch die Hohlkörper kostengünstiger herstellbar.The advantage achieved by the invention is that the forming rams can be used for the production of several hollow bodies due to the practically arbitrary spatial adjustability, so that only the remaining parts of the tool arrangement have to be replaced. The device according to the invention can thus be converted much more quickly, so that the hollow bodies can also be produced more cost-effectively.

Für die weitere Ausgestaltung bestehen im Rahmen der Erfindung mehrere Möglichkeiten. So sind nach einer bevorzugten Ausführungsform die Hydraulikzylinderkolbenanordnungen in Gelenkköpfen verschwenkbar, die Gelenkköpfe in zueinander parallelen Längsführungen verstellbar und die Längsführungen auf einer zu den Längsführungen orthogonalen Kreisführung um deren Zentralachse verschwenkbar gelagert. Die Gelenkköpfe wird man vorteilhafterweise als Kugelgelenkköpfe ausbilden. Für die Längsführungen sind Taschenkulissen besonders geeignet. Jedenfalls empfiehlt es sich, die Anordnung so zu treffen, daß die Hydraulikzylinderkolbenanordnungen, die Gelenkköpfe und die Längsführungen jeweils unabhängig voneinander einstellbar sind. Das schließt jedoch nicht aus, daß im Bedarfsfalle auch ein paarweises Zusammenwirken dieser Bauteile verwirklicht werden kann.There are several possibilities for the further configuration within the scope of the invention. Thus, according to a preferred embodiment, the hydraulic cylinder piston arrangements can be pivoted in rod ends, the rod ends can be adjusted in parallel longitudinal guides and the longitudinal guides can be pivoted on a circular guide orthogonal to the longitudinal guides about their central axis. The joint heads will advantageously be designed as ball joint heads. Pocket sets are particularly suitable for the longitudinal guides. In any case, it is advisable to make the arrangement so that the hydraulic cylinder piston arrangements, the rod ends and the longitudinal guides are each independently adjustable. However, this does not preclude the fact that a pairwise interaction of these components can also be achieved if necessary.

Im folgenden wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen

Fig. 1
eine Vorrichtung zum Herstellen von Hohlkörpern und
Fig. 2
eine Seitenansicht des Gegenstandes der Fig. 1.
The invention is explained in more detail below with reference to a drawing which represents an exemplary embodiment. Show it
Fig. 1
a device for producing hollow bodies and
Fig. 2
2 shows a side view of the object of FIG. 1.

Die in den Figuren dargestellte Vorrichtung dient zum Herstellen von Hohlkörpern durch kaltes Umformen eines metallischen Rohres nach dem Innenhochdruckverfahren. Die Vorrichtung weist ein nur angedeutetes Pressengestell 1 und eine Werkzeuganordnung 2 auf. Diese umfaßt mehrere, im Ausführungsbeispiel zwei Umformstößel 3. Die zwischen den Umformstößeln 3 befindlichen zweigeteilten Werkzeuganordnungsteile, die die endgültige Gestalt des herzustellenden Hohlkörpers aufweisen, sind im einzelnen nicht dargestellt. Jeder der Umformstößel 3 ist am freien axial beweglichen Ende einer zugeordneten Hydraulikzylinderkolbenanordnung 4 vorgesehen. Zumindest einer der Umformstößel ist mit einer Druckmittelzuführung versehen, über die ein Druckmittel in das Innere des kalt umzuformenden Rohres eingeleitet werden kann.The device shown in the figures is used to produce hollow bodies by cold forming a metallic tube using the internal high-pressure process. The device has a press frame 1, which is only indicated, and a tool arrangement 2. This includes several, in the exemplary embodiment two forming plungers 3. The two-part tool arrangement parts located between the forming plungers 3 and having the final shape of the hollow body to be produced are not shown in detail. Each of the shaping tappets 3 is provided on the free axially movable end of an associated hydraulic cylinder piston arrangement 4. At least one of the shaping tappets is provided with a pressure medium supply, via which a pressure medium can be introduced into the interior of the tube to be cold-formed.

Wie man durch eine vergleichende Betrachtung der Figuren ohne weiteres feststellt, sind die Umformstößel 3 relativ zueinander bezüglich Wirkungsachse und Angriffspunkt mehr oder weniger beliebig im Raum einstellbar. Hierzu sind die Hydraulikzylinderkolbenanordnungen 4 in Gelenkköpfen 5 allseitig verschwenkbar gelagert; diese Verschwenkbarkeit ist durch die Doppelpfeile A gekennzeichnet. Außerdem sind die Gelenkköpfe 5 in zueinander parallelen vertikalen Längsführungen 6 verstellbar; das verdeutlichen die Doppelpfeile B. Darüber hinaus sind die Längsführungen 6 noch auf einer zu den Längsführungen 6 orthogonalen, also horizontalen Kreisführung 7 um deren vertikale Zentralachse 8 verschwenkbar gelagert; das verdeutlichen die Doppelpfeile C. Der Doppelpfeil D verdeutlicht, daß der Angriffspunkt der Umformstößel 3 in Längsrichtung der Hydraulikzylinderkolbenanordnung 4 einstellbar ist.As can be easily determined by comparing the figures, the shaping plungers 3 can be adjusted more or less freely in space with respect to the axis of action and the point of application. For this purpose, the hydraulic cylinder piston assemblies 4 are pivotally mounted in joint heads 5; this pivotability is indicated by the double arrows A. In addition, the rod ends 5 are adjustable in parallel vertical longitudinal guides 6; this is illustrated by the double arrows B. In addition, the longitudinal guides 6 still mounted on an orthogonal to the longitudinal guides 6, ie horizontal circular guide 7 about its vertical central axis 8; this is illustrated by the double arrows C. The double arrow D illustrates that the point of application of the shaping plunger 3 can be adjusted in the longitudinal direction of the hydraulic cylinder piston arrangement 4.

Die Gelenkköpfe 5 sind als Kugelgelenkköpfe und die Längsführungen 6 als Taschenkulissen ausgebildet. Dabei ist die Anordnung so getroffen, daß die Längseinstellung der Hydraulikzylinderkolbenanordnung (4), die Kreisführung (7), die Gelenkköpfe (5) und die Längsführungen (6) jeweils unabhängig voneinander einstellbar sind.The joint heads 5 are designed as ball joint heads and the longitudinal guides 6 as pocket sets. The arrangement is such that the longitudinal adjustment of the hydraulic cylinder piston assembly (4), the circular guide (7), the rod ends (5) and the longitudinal guides (6) are each independently adjustable.

Zum Herstellen eines anderen Hohlkörpers werden die zwischen den Umformstößeln 3 liegenden Teile der Werkzeuganordnung entfernt, die Umformstößel 3 in die für die Herstellung des neuen Hohlkörpers erforderliche Position gebracht. Daraufhin werden die dem neuen Hohlkörper zugeordneten Werkzeugteile zwischen den Umformstößeln 3 angebracht.To produce another hollow body, the parts of the tool arrangement lying between the shaping plungers 3 are removed, and the shaping plungers 3 are brought into the position required for producing the new hollow body. The tool parts assigned to the new hollow body are then attached between the forming plungers 3.

Im Ausführungsbeispiel ist die Vorrichtung mit zwei Umformstößeln 3 dargestellt. Es versteht sich von selbst, daß je nach herzustellendem Hohlkörper aber auch mehr als zwei Umformstößel 3 vorgesehen sein können.In the exemplary embodiment, the device is shown with two forming rams 3. It goes without saying that, depending on the hollow body to be produced, more than two shaping rams 3 can also be provided.

Claims (5)

  1. Apparatus for producing hollow bodies through deformation of a pipe by the internal high-pressure method, comprising a plurality of forming rams (3) which are each mounted at the free axially movable end of an associated hydraulic cylinder piston arrangement (4), at least one of said forming rams (3) being equipped with a pressurized fluid supply means, characterized in that said forming rams (3) are adjustable relative to each other in space with regard to their operating axis and point of attack.
  2. Apparatus as claimed in claim 1, characterized in that the hydraulic cylinder piston arrangements (4) are pivotably supported by articulated joint heads (5), that said articulated joint heads (5) are adjustable in mutually parallel longitudinal guide means (6), and that said longitudinal guide means (6) are arranged on an annular guide means (7) which is located in a position orthogonal to said longitudinal guide means (6) so that the latter are pivotable about the central axis (8) of said annular guide means.
  3. Apparatus as claimed in claim 2, characterized in that said articulated joint heads (5) take the form of ball joint heads.
  4. Apparatus as claimed in any of claims 2 or 3, characterized in that said longitudinal guide means(6) take the form of pocket detent guideways.
  5. Apparatus as claimed in any of claims 2 through 4, characterized in that said hydraulic cylinder piston arrangements (4), said joint heads (5), and said longitudinal guide means (4) are each adjustable independently of one another.
EP94104469A 1993-06-18 1994-03-22 Apparatus for making hollow products Expired - Lifetime EP0629456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4320236 1993-06-18
DE4320236A DE4320236C1 (en) 1993-06-18 1993-06-18 Hollow-body formation method from pipe - has shaping tappet axes and working positions adjustable in relation to each other

Publications (2)

Publication Number Publication Date
EP0629456A1 EP0629456A1 (en) 1994-12-21
EP0629456B1 true EP0629456B1 (en) 1997-06-11

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EP94104469A Expired - Lifetime EP0629456B1 (en) 1993-06-18 1994-03-22 Apparatus for making hollow products

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US (1) US5435163A (en)
EP (1) EP0629456B1 (en)
DE (1) DE4320236C1 (en)
ES (1) ES2065314T3 (en)

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Also Published As

Publication number Publication date
ES2065314T1 (en) 1995-02-16
DE4320236C1 (en) 1994-03-31
ES2065314T3 (en) 1997-07-16
US5435163A (en) 1995-07-25
EP0629456A1 (en) 1994-12-21

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