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EP0083577B1 - Device for holding tube ends in a hydraulic press for upsetting tube ends - Google Patents

Device for holding tube ends in a hydraulic press for upsetting tube ends Download PDF

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Publication number
EP0083577B1
EP0083577B1 EP83730001A EP83730001A EP0083577B1 EP 0083577 B1 EP0083577 B1 EP 0083577B1 EP 83730001 A EP83730001 A EP 83730001A EP 83730001 A EP83730001 A EP 83730001A EP 0083577 B1 EP0083577 B1 EP 0083577B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder unit
elbow
pipe end
holding device
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
Application number
EP83730001A
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German (de)
French (fr)
Other versions
EP0083577A1 (en
Inventor
Herbert Jansen
Richard Gerretz
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT83730001T priority Critical patent/ATE12899T1/en
Publication of EP0083577A1 publication Critical patent/EP0083577A1/en
Application granted granted Critical
Publication of EP0083577B1 publication Critical patent/EP0083577B1/en
Expired legal-status Critical Current

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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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses

Definitions

  • the invention relates to a holding device for the pipe end pieces in a hydraulic pipe end press, which has a C-shaped frame in which the pipe end is held between the upper and lower die half, the lower die half being received in the press table and the upper die half in the crosshead and the crosshead can be moved against the press table with the aid of at least one piston-cylinder unit which applies the holding force (see DE-OS 27 31 055).
  • the upsetting of the tube ends is generally carried out using a tube end upsetting press of the type described above, the upsetting of the tube inserted and held in the die halves being carried out with the aid of an upsetting device provided on the rear side of the C-frame.
  • This consists of a hydraulic cylinder acting in the longitudinal direction of the tube, the force required for the upsetting process is applied via a stepped mandrel to the end face of the tube end piece in its axial direction.
  • the closing of the holding device necessary for holding the pipe end can be divided into two movement processes, one of which serves to move the die halves apart far enough for lateral insertion of the pipe and the other movement serves to actually hold the pipe end in an exciting manner.
  • both movement processes are carried out by a piston-cylinder unit which is large in accordance with the necessary holding force and which must have a stroke which is adapted to the opening travel of the die halves.
  • a device for handling pipes or the like is known from US Pat. No. 2,871,734, in which piston-cylinder units serve to stretch toggle levers which are intended to exert a clamping effect on the pipe in the extended position. Hydraulic bracing of the tube does not take place here, because in the extended position of the toggle lever the tube can only be clamped if the toggle levers are supported against abutments, the latter abutment having to be adjusted if different tube tolerances are to be tensioned.
  • the invention has for its object to provide a holding device of the type mentioned, which allows a reduction in cycle time for loading and unloading the holding device with less construction and cost reduction.
  • a holding device which is characterized by a toggle lever transmitting the holding force in its extended position, one end of which is articulated to the piston of the piston-cylinder unit and the other end of which is articulated to the crosshead and the knee joint is connected to another power drive for kinking and stretching the knee lever.
  • the movement processes described at the outset are divided into two device components, namely a toggle lever for rapid mechanical movement of the crosshead with the upper die half and the exciting holding of the pipe end with the aid of the conventional piston-cylinder unit.
  • This enables the use of short-stroke, high-performance pressure cylinders for the application of the clamping force and weak and therefore less expensive power drives for the tension-free travel of the crosshead with the upper die half.
  • a favorable embodiment of the solution according to the invention is characterized in that for two toggle levers arranged symmetrically next to one another a common power drive is provided for the synchronous bending and stretching of both toggle levers.
  • the power drive for kinking and stretching the knee lever (s) is a piston-cylinder unit.
  • This piston-cylinder unit can be dimensioned weak, since it only has to overcome the displacement force of the crosshead, essentially its own weight.
  • a favorable embodiment of the device according to the invention provides that the piston-cylinder unit is arranged between the two piston-cylinder units which apply the holding force with the same direction of action and the piston force is connected via one each with the knee joint of each toggle lever this and on the other hand with the piston rod of the piston-cylinder unit connected pull and push rods is branched.
  • This Proposed mechanical elements are largely used, which require little maintenance with high operational reliability and are not only inexpensive, but also robust.
  • the use of two short-stroke clamping-piston-cylinder units in connection with the piston-cylinder unit arranged in between for the adjustment of the articulated lever allows a compact, space-saving construction with favorable introduction of the forces. It is even conceivable and advantageous to apply different hydraulic pressures to the tensioning piston-cylinder units in order, for. B. compress the actual compression shell area more firmly by higher pressure.
  • the toggle lever or arms are preferably secured in their extended position against buckling. This can be done, for example, in that the articulation points of the toggle lever are placed in such a way that when the holding force is applied, the toggle lever is overstretched against a stop, so that there can be no unintentional buckling of the toggle lever.
  • the C-press frame 1 is designed in a known manner. Inside the opening of the C-frame the press table 2 is mounted below and the crosshead 3 above. The lower die half 5 is connected to the press table 2, the upper die half 4 is attached to the crosshead 3. The crosshead 3 is vertically displaceable in guides, not shown, so that in the closed position of the die halves (FIG. 2) the halves complement each other to form a stepped bore.
  • a pair of hydraulic tensioning cylinders 6 and 7 are fastened to the C-shaped frame 1, each cylinder being fastened to the frame 1 by means of a crossmember 8 (FIG. 3).
  • the two upper levers 9 and 10 of the toggle lever are articulated on the piston rods 11 and 12 of the piston-cylinder units 6 and 7, and the lower levers 13 and 14 of the toggle lever are articulated on the crosshead, the articulation points of the toggle levers 9, 13 and 10, 14 are denoted by 15 and 16.
  • the piston-cylinder unit 17 with the piston rod 18 is vertically mounted in the middle, which serves to drive the toggle levers.
  • the knee joints 15 and 16 of the toggle levers are connected to one another via push-pull rods 19, 20, the free ends of the push-push rods 19, 20 being fastened to a common joint 21, on which the piston rod 18 of the piston-cylinder unit 17 is also located is articulated.
  • the compression mandrel 22 (the drive means of which are not shown) is axially aligned with the split die.
  • Fig. 1 the open position of the tube end press is shown.
  • the piston-cylinder unit 17 is acted upon by hydraulic fluid in such a way that the piston rod 18 in its extended position spreads the push-pull rods 19, 20 beyond the articulation point 21 and thus causes the toggle levers 9, 13 and 10, 14 to buckle.
  • the crosshead 3 is pulled upwards in the guides (not shown) and the tube to be compressed can be inserted into the lower die 5 of the press table 2.
  • the piston becomes. with the piston rod 18 moved upwards, the articulation point 21 between the piston rod 18 and the pull and push rods 19, 20 also moving upward and the pull and push rods 19, 20 articulated on the knee joint points 15 and 16 stretching the toggle levers 9 , 13 and 10, 14 effect.
  • the crosshead 3 with the upper die half 4 is briefly moved downward and brought into a position in which the upper die half 4 lies almost against the pipe end to be compressed.
  • the pivot points 15 and 16 are held at a distance X (Fig. 2) in such a way that the knee joint points 15 and 16 beyond the connecting line of the upper and lower pivot points of the levers 10 and 14 or 9 and 13 of the respective Lie toggle lever and the applied holding force causes the toggle lever to be placed against the stop described above.
  • the stretched toggle lever By introducing hydraulic fluid through the inlet openings 24 and 25 of the piston-cylinder units 6 and 7, the stretched toggle lever covers the remaining way until the upper die half 4 is placed against the pipe end and by further loading of the piston-cylinder units 6 and 7 stretched the pipe. If necessary, the piston rod 18 or the entire piston-cylinder unit 17 can be readjusted in accordance with the path required for the clamping.
  • the compression mandrel 22 is moved in the direction of arrow 26 by means (not shown) in order to upset the pipe end clamped between the upper and lower die halves 4 and 5.
  • the crosshead 3 is returned to its open position in the reverse order.
  • the compression mandrel 22 is returned to its starting position, the pressure acting on the piston-cylinder unit 6 and 7 is removed and the annular surfaces on the piston rod side of the piston-cylinder unit are pressurized via the openings 26 and 27, respectively.
  • the pistons 11 and 12 move into their upper end position and the clamping force on the pipe end is released.
  • the piston rod 18 is guided downwards with the articulation point 21, as a result of which the push-pull rods 19 and 20 spread and cause the toggle levers 9, 13 and 10, 14 to buckle. This briefly raises the crosshead 3 with the upper die half 4 and the tube end press is open for removal and reloading.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

1. Holding device for the pipe end pieces in a hydraulic pipe end press, which has a C-shaped frame (1) in which the pipe end is held between the upper and the lower matrix half (4, 5) whereby the lower matrix half (5) is held in the pressing table and the upper matrix half (4) is held in the cross piece and the cross piece is movable toward the pressing table with the aid of at least one piston/cylinder unit (6, 7) applying the holding force, characterized by an elbow lever (9, 13, 10, 14) transferring the holding force in its extended position, the one end (9, 10) of which is articulated on the piston (11, 12) of the piston/cylinder unit (6, 7) and the other end of which (13, 14) is articulatedly connected with the cross piece (3) and the elbow joint (15, 16) of which is connected with a further power drive (17) to bend and extend the elbow lever (9, 13, 10, 14).

Description

Die Erfindung betrifft eine Haltevorrichtung für die Rohrendstücke in einer hydraulischen Rohrendenpresse, die einen C-förmigen Rahmen aufweist, in dem das Rohrende zwischen der oberen und der unteren Matrizenhälfte gehalten wird, wobei die untere Matrizenhälfte im Pressentisch und die obere Matrizenhälfte im Querhaupt aufgenommen wird und das Querhaupt mit Hilfe von mindestens einer die Haltekraft aufbringenden Kolben-Zylinder-Einheit gegen den Pressentisch bewegbar ist (s. DE-OS 27 31 055).The invention relates to a holding device for the pipe end pieces in a hydraulic pipe end press, which has a C-shaped frame in which the pipe end is held between the upper and lower die half, the lower die half being received in the press table and the upper die half in the crosshead and the crosshead can be moved against the press table with the aid of at least one piston-cylinder unit which applies the holding force (see DE-OS 27 31 055).

Bei der Produktion von Rohren, insbesondere Ölfeldrohren wie Casings, Tubings usw. ist es erforderlich, die Wand des Rohres im Bereich des Rohrendes anzustauchen, um darin ein Innen-oder Außengewinde einschneiden zu können oder um das Anschweißen einer Muffe zu erleichtern. Das Anstauchen der Rohrenden erfolgt im allgemeinen mit einer Rohrendenstauchpresse der vorstehend beschriebenen Art, wobei das Anstauchen des in den Matrizenhälften eingelegten und gehaltenen Rohres mit Hilfe einer an der Rückseite des C-Rahmens vorgesehenen Stauchvorrichtung erfolgt. Diese besteht aus einem in Rohrlängsrichtung wirkenden hydraulischen Zylinder, dessen für den Stauchvorgang erforderliche Kraft über einen abgestuften Dorn auf die Stirnseite des rohrendstückes in dessen axialer Richtung aufgebracht wird.In the production of pipes, in particular oilfield pipes such as casings, tubings etc., it is necessary to immerse the wall of the pipe in the area of the pipe end in order to be able to cut an internal or external thread therein or to facilitate the welding of a sleeve. The upsetting of the tube ends is generally carried out using a tube end upsetting press of the type described above, the upsetting of the tube inserted and held in the die halves being carried out with the aid of an upsetting device provided on the rear side of the C-frame. This consists of a hydraulic cylinder acting in the longitudinal direction of the tube, the force required for the upsetting process is applied via a stepped mandrel to the end face of the tube end piece in its axial direction.

Das Schließen der für das Halten des Rohrendes notwendigen Haltevorrichtung läßt sich in zwei Bewegungsvorgänge aufteilen, von denen der eine Bewegungsvorgang dazu dient, die Matrizenhälften zum seitlichen Einführen des Rohres weit genug auseinanderzufahren und der andere Bewegungsvorgang dem eigentlichen spannenden Halten des Rohrendes dient. Bei den Haltevorrichtungen des Standes der Technik werden beide Bewegungsvorgänge von einer entsprechend der notwendigen Haltekraft groß dimensionierten Kolben-Zylinder-Einheit durchgeführt, die einen Hub aufweisen muß, der dem Öffnungsweg der Matrizenhälften angepaßt ist.The closing of the holding device necessary for holding the pipe end can be divided into two movement processes, one of which serves to move the die halves apart far enough for lateral insertion of the pipe and the other movement serves to actually hold the pipe end in an exciting manner. In the holding devices of the prior art, both movement processes are carried out by a piston-cylinder unit which is large in accordance with the necessary holding force and which must have a stroke which is adapted to the opening travel of the die halves.

Es hat sich gezeigt, daß infolge des notwendigen relativ großen Hubes der Kolben-Zylinder-Einheit, der notwendig ist, um die Matrizenhälften weit genug auseinanderzufahren, die Kolben-Zylinder-Einheit überdimensioniert ist, weil der eigentliche Spann-Hub zum Halten des Rohres zwar einen kräftigen, jedoch nur kurzen Zylinder erforderlich macht. Es ist deshalb als nachteilig anzusehen, daß eine derart überdimensionierte Kolben-Zylinder-Einheit einen Bauaufwand darstellt, der für den geforderten Zweck nicht erforderlich ist. Ein anderer Nachteil ist darin zu erkennen, daß der lange Kolbenhub der Kolben-Zylinder-Einheit die Taktzeit zum Laden und Entladen der Haltevorrichtung unnötig verlängert und unnötige Mengen Hydraulikflüssigkeit erforderlich macht.It has been shown that due to the necessary relatively large stroke of the piston-cylinder unit, which is necessary to move the die halves far enough apart, the piston-cylinder unit is oversized because the actual clamping stroke for holding the tube requires a strong but short cylinder. It is therefore to be regarded as a disadvantage that such an oversized piston-cylinder unit represents a construction effort that is not necessary for the required purpose. Another disadvantage can be seen in the fact that the long piston stroke of the piston-cylinder unit unnecessarily extends the cycle time for loading and unloading the holding device and requires unnecessary amounts of hydraulic fluid.

Aus der US-PS 2 871 734 ist eine Vorrichtung zur Handhabung von Rohren o. dgl. bekannt, bei der Kolben-Zylinder-Einheiten zum Strekken von Kniehebeln dienen, die in der gestreckten Stellung eine Klemmwirkung auf das Rohr ausüben sollen. Eine hydraulische Verspannung des Rohres findet hier nicht statt, weil in gestreckter Stellung des Kniehebels ein Klemmen des Rohres nur dann erfolgen kann, wenn die Kniehebel gegen Widerlager abgestützt sind, wobei letztere Widerlager verstellt werden müssen, wenn unterschiedliche Rohrtoleranzen gespannt werden sollen.A device for handling pipes or the like is known from US Pat. No. 2,871,734, in which piston-cylinder units serve to stretch toggle levers which are intended to exert a clamping effect on the pipe in the extended position. Hydraulic bracing of the tube does not take place here, because in the extended position of the toggle lever the tube can only be clamped if the toggle levers are supported against abutments, the latter abutment having to be adjusted if different tube tolerances are to be tensioned.

Der Erfindung liegt die Aufgabe zugrunde, eine Haltevorrichtung der eingangs genannten Art zu schaffen, die bei einem geringeren Bauaufwand und bei Kostenreduzierung eine Verkürzung der Taktzeit für das Be- und Entladen der Haltevorrichtung ermöglicht.The invention has for its object to provide a holding device of the type mentioned, which allows a reduction in cycle time for loading and unloading the holding device with less construction and cost reduction.

Zur Lösung der Aufgabe wird erfindungsgemäß eine Haltevorrichtung vorgeschlagen, die gekennzeichnet ist durch einen die Haltekraft in seiner gestreckten Stellung übertragenden Kniehebel, dessen eines Ende an dem Kolben der Kolben-Zylinder-Einheit angelenkt und dessen anderes Ende mit dem Querhaupt gelenkig verbunden ist und dessen Kniegelenk mit einem weiteren Kraftantrieb zum Knicken und Strecken des Kniehebels in Verbindung steht.To achieve the object, a holding device is proposed according to the invention, which is characterized by a toggle lever transmitting the holding force in its extended position, one end of which is articulated to the piston of the piston-cylinder unit and the other end of which is articulated to the crosshead and the knee joint is connected to another power drive for kinking and stretching the knee lever.

Durch den Vorschlag der Erfindung werden die eingangs geschilderten Bewegungsvorgänge aufgeteilt auf zwei Vorrichtungsbauteile, nämlich auf einen Kniehebel zum schnellen mechanischen Verfahren des Querhauptes mit der oberen Matrizenhälfte und das spannende Halten des Rohrendes mit Hilfe der herkömmlichen Kolben-Zylinder-Einheit. Dies ermöglicht den Einsatz von kurzhubigen Hochleistungsdruckzylindern für das Aufbringen der Spannkraft und schwachen und somit kostengünstigeren Kraftantrieben für den spannkraftlosen Verfahrweg des Querhauptes mit der oberen Matrizenhälfte.Through the proposal of the invention, the movement processes described at the outset are divided into two device components, namely a toggle lever for rapid mechanical movement of the crosshead with the upper die half and the exciting holding of the pipe end with the aid of the conventional piston-cylinder unit. This enables the use of short-stroke, high-performance pressure cylinders for the application of the clamping force and weak and therefore less expensive power drives for the tension-free travel of the crosshead with the upper die half.

Eine günstige Ausgestaltung der erfindungsgemäßen Lösung ist dadurch gekennzeichnet, daß für zwei symmetrisch nebeneinander angeordnete Kniehebel ein gemeinsamer Kraftantrieb zum synchronen Knicken und Strecken beider Kniehebel vorgesehen ist.A favorable embodiment of the solution according to the invention is characterized in that for two toggle levers arranged symmetrically next to one another a common power drive is provided for the synchronous bending and stretching of both toggle levers.

Vorzugsweise ist vorgesehen, daß der Kraftantrieb zum Knicken und Strecken des bzw. der Kniehebel eine Kolben-Zylinder-Einheit ist. Diese Kolben-Zylinder-Einheit kann schwach dimensioniert sein, da sie lediglich die Verschiebekraft des Querhauptes, im wesentlichen also dessen Eigengewicht zu überwinden hat.It is preferably provided that the power drive for kinking and stretching the knee lever (s) is a piston-cylinder unit. This piston-cylinder unit can be dimensioned weak, since it only has to overcome the displacement force of the crosshead, essentially its own weight.

Eine günstige Ausbildung der erfindungsgemäßen Vorrichtung sieht vor, daß die Kolben-Zylinder-Einheit zwischen den beiden, die Haltekraft aufbringenden Kolben-Zylinder-Einheiten mit gleicher Wirkrichtung angeordnet ist und die Kolbenkraft über je eine mit dem Kniegelenk jedes Kniehebels in Verbindung stehende, einerseits mit diesem und andererseits mit der Kolbenstange der Kolben-Zylinder-Einheit verbundene Zug- und Druckstangen verzweigt ist. Bei deisem Vorschlag werden weitgehend mechanische Elemente verwendet, die bei hoher Betriebssicherheit wenig Wartungsaufwand benötigen und nicht nur preisgünstig, sondern auch robust zu erstellen sind. Die Verwendung zweier kurzhubiger Spann-Kolben-Zylindereinheiten in Verbindung mit der dazwischen angeordneten Kolben-Zylinder-Einheit für die Verstellung der Knickhebel gestattet eine kompakte platzsparende Bauweise bei günstiger Einleitung der Kräfte. Es ist sogar denkbar und vorteilhaft, die Spann-Kolben-Zylindereinheiten mit unterschiedlichen hydraulischen Drücken zu beaufschlagen, um z. B. den eigentlichen Stauchschalenbereich durch höheren Druck fester zusammenzupressen.A favorable embodiment of the device according to the invention provides that the piston-cylinder unit is arranged between the two piston-cylinder units which apply the holding force with the same direction of action and the piston force is connected via one each with the knee joint of each toggle lever this and on the other hand with the piston rod of the piston-cylinder unit connected pull and push rods is branched. With this Proposed mechanical elements are largely used, which require little maintenance with high operational reliability and are not only inexpensive, but also robust. The use of two short-stroke clamping-piston-cylinder units in connection with the piston-cylinder unit arranged in between for the adjustment of the articulated lever allows a compact, space-saving construction with favorable introduction of the forces. It is even conceivable and advantageous to apply different hydraulic pressures to the tensioning piston-cylinder units in order, for. B. compress the actual compression shell area more firmly by higher pressure.

Vorzugsweise ist der oder sind die Kniehebel in ihrer Streckstellung gegen Ausknicken gesichert. Dies kann beispielsweise dadurch geschehen, daß die Gelenkpunkte des Kniehebels so gelegt sind, daß beim Aufbringen der Haltekraft der Kniehebel gegen einen Anschlag überstreckt wird, so daß kein unbeabsichtigtes Einknicken des Kniehebels vorkommen kann.The toggle lever or arms are preferably secured in their extended position against buckling. This can be done, for example, in that the articulation points of the toggle lever are placed in such a way that when the holding force is applied, the toggle lever is overstretched against a stop, so that there can be no unintentional buckling of the toggle lever.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und nachfolgend beschrieben. Es zeigen :

  • Figur 1 einen schematischen Querschnitt durch eine Rohrendenpresse in geöffneter Stellung,
  • Figur 2 den gleichen Querschnitt der Rohrendenpresse, jedoch in geschlossener Stellung und
  • Figur 3 einen Teilquerschnitt der Presse gemäß Schnittlinie X-X.
An embodiment of the invention is shown in the drawing and described below. Show it :
  • FIG. 1 shows a schematic cross section through a pipe end press in the open position,
  • Figure 2 shows the same cross section of the tube end press, but in the closed position and
  • Figure 3 shows a partial cross section of the press along section line XX.

Der C-Pressenrahmen 1 ist in bekannter Weise ausgeführt. Innerhalb der Öffnung des C-Rahmens sind unten der Preßtisch 2 und oben das Querhaupt 3 montiert. Die untere Matrizenhälfte 5 ist mit dem Preßtisch 2 verbunden, die obere Matrizenhälfte 4 ist am Querhaupt 3 befestigt. Das Querhaupt 3 ist in nicht dargestellten Führungen senkrecht verschiebbar, so daß in der geschlossenen Stellung der Matrizenhälften (Fig. 2) sich die Hälften zu einer abgestuften Bohrung ergänzen.The C-press frame 1 is designed in a known manner. Inside the opening of the C-frame the press table 2 is mounted below and the crosshead 3 above. The lower die half 5 is connected to the press table 2, the upper die half 4 is attached to the crosshead 3. The crosshead 3 is vertically displaceable in guides, not shown, so that in the closed position of the die halves (FIG. 2) the halves complement each other to form a stepped bore.

Am C-förmigen Rahmen 1 ist ein Paar hydraulischer Spannzylinder 6 und 7 befestigt, wobei jeder Zylinder mittels einer Traverse 8 (Fig. 3) am Rahmen 1 befestigt ist.A pair of hydraulic tensioning cylinders 6 and 7 are fastened to the C-shaped frame 1, each cylinder being fastened to the frame 1 by means of a crossmember 8 (FIG. 3).

An den Kolbenstangen 11 und 12 der Kolben-Zylinder-Einheiten 6 und 7 sind die beiden oberen Hebel 9 und 10 des Kniehebels, am Querhaupt die unteren Hebel 13 und 14 der Kniehebel angelenkt, wobei die Gelenkpunkte der Kniehebel 9,13 bzw. 10, 14 mit 15 und 16 bezeichnet sind.The two upper levers 9 and 10 of the toggle lever are articulated on the piston rods 11 and 12 of the piston-cylinder units 6 and 7, and the lower levers 13 and 14 of the toggle lever are articulated on the crosshead, the articulation points of the toggle levers 9, 13 and 10, 14 are denoted by 15 and 16.

Zwischen den beiden Kolben-Zylinder-Einheiten 6 und 7 ist mittig die Kolben-Zylinder-Einheit 17 mit der Kolbenstange 18 vertikal montiert, die dem Antrieb der Kniehebel dient. Die Kniegelenke 15 und 16 der Kniehebel sind über Zug-Druckstangen 19, 20 miteinander verbunden, wobei die freien Enden der Zug-Druckstangen 19, 20 an einem gemeinsamen Gelenk 21 befestigt sind, an dem gleichfalls die Kolbenstange 18 der Kolben-Zylinder-Einheit 17 gelenkig angeschlossen ist.Between the two piston-cylinder units 6 and 7, the piston-cylinder unit 17 with the piston rod 18 is vertically mounted in the middle, which serves to drive the toggle levers. The knee joints 15 and 16 of the toggle levers are connected to one another via push-pull rods 19, 20, the free ends of the push-push rods 19, 20 being fastened to a common joint 21, on which the piston rod 18 of the piston-cylinder unit 17 is also located is articulated.

Der Stauchdorn 22 (dessen Antriebsmittel nicht abgebildet sind) ist mit der geteilten Matrize axial ausgerichtet.The compression mandrel 22 (the drive means of which are not shown) is axially aligned with the split die.

Funktionsweise :Functionality :

In Fig. 1 ist die Öffnungsstellung der Rohrendenpresse dargestellt. Durch Beaufschlagung der kolbenstangenseitigen Ringkolbenfläche der Kolben-Zylinder-Einheiten 6. und 7 sind diese in eine obere Stellung gefahren, und dort gehalten. Die Kolben-Zylinder-Einheit 17 ist derart mit Hydraulikflüssigkeit beaufschlagt, daß die Kolbenstange 18 in ihrer ausgefahrenen Stellung die Zug-Druckstangen 19, 20 über den Anlenkpunkt 21 abspreizt und somit ein Einknicken der Kniehebel 9, 13 bzw. 10, 14 bewirkt. Dadurch wird das Querhaupt 3 in den nicht dargestellten Führungen nach oben gezogen und das zu stauchende Rohr kann in die untere Matrize 5 des Pressentischs 2 eingelegt werden.In Fig. 1 the open position of the tube end press is shown. By acting on the piston rod-side annular piston surface of the piston-cylinder units 6 and 7, these are moved to an upper position and held there. The piston-cylinder unit 17 is acted upon by hydraulic fluid in such a way that the piston rod 18 in its extended position spreads the push-pull rods 19, 20 beyond the articulation point 21 and thus causes the toggle levers 9, 13 and 10, 14 to buckle. As a result, the crosshead 3 is pulled upwards in the guides (not shown) and the tube to be compressed can be inserted into the lower die 5 of the press table 2.

Durch Beaufschlagen der Kolben-Zylinder-Einheit 17 mit Hydraulikflüssigkeit wird der Kolben. mit der Kolbenstange 18 nach oben bewegt, wobei der Anlenkpunkt 21 zwischen Kolbenstange 18 und den Zug- und Druckstangen 19, 20 sich ebenfalls nach oben bewegt und die an den Kniegelenkpunkten 15 und 16 angelenkten Zug-und Druckstangen 19, 20 ein Strecken der Kniehebel 9, 13 und 10, 14 bewirken. Durch diesen Vorgang wird das Querhaupt 3 mit der oberen Matrizenhälfte 4 kurzzeitig nach unten bewegt und in eine Stellung gebracht, in der die obere Matrizenhälfte 4 fast am zu stauchenden Rohrende anliegt. Durch eine entsprechende Einrichtung, z. B. einen Anschlag werden die Drehpunkte 15 und 16 in einem Abstand X (Fig. 2) gehalten und zwar dergestalt, daß die Kniegelenkpunkte 15 und 16 jenseits der Verbindungslinie der oberen und unteren Anlenkpunkte der hebel 10 und 14 bzw. 9 und 13 des jeweiligen Kniehebels liegen und die aufgebrachte Haltekraft ein Anlegen des Kniehebels gegen den vorstehend beschriebenen Anschlag bewirkt.By applying hydraulic fluid to the piston-cylinder unit 17, the piston becomes. with the piston rod 18 moved upwards, the articulation point 21 between the piston rod 18 and the pull and push rods 19, 20 also moving upward and the pull and push rods 19, 20 articulated on the knee joint points 15 and 16 stretching the toggle levers 9 , 13 and 10, 14 effect. As a result of this process, the crosshead 3 with the upper die half 4 is briefly moved downward and brought into a position in which the upper die half 4 lies almost against the pipe end to be compressed. By an appropriate device, for. B. a stop, the pivot points 15 and 16 are held at a distance X (Fig. 2) in such a way that the knee joint points 15 and 16 beyond the connecting line of the upper and lower pivot points of the levers 10 and 14 or 9 and 13 of the respective Lie toggle lever and the applied holding force causes the toggle lever to be placed against the stop described above.

In der gestreckten Stellung der Kniehebel 9, 13 und 10, 14 werden die Kolben-Zylinder-Einheiten 6 und 7 mit Hydraulikflüssigkeit beaufschlagt, wobei die Kolben-Zylinder-Einheit 17 durch Aufrechterhaltung des Flüssigkeitsdruckes gegen den Kolben 23 in der eingenommenen Stellung verbleibt.In the extended position of the toggle levers 9, 13 and 10, 14, the piston-cylinder units 6 and 7 are acted upon by hydraulic fluid, the piston-cylinder unit 17 remaining in the assumed position by maintaining the liquid pressure against the piston 23.

Durch Einleiten von Hydraulikflüssigkeit durch die Einlassöffnungen 24 und 25 der Kolben-Zylinder-Einheit 6 und 7 wird über die gestreckten Kniehebel der noch verbliebene Weg bis zum Anlegen der oberen Matrizenhälfte 4 an das Rohrende zurückgelegt und durch weiteres Beaufschlagen der Kolben-Zylinder-Einheiten 6 und 7 das Rohr gespannt. Wenn erforderlich, kann die Kolbenstange 18 oder die gesamte Kolben-Zylinder-Einheit 17 entsprechend dem für das Spannen notwendigen Weg nachgesteuert werden.By introducing hydraulic fluid through the inlet openings 24 and 25 of the piston-cylinder units 6 and 7, the stretched toggle lever covers the remaining way until the upper die half 4 is placed against the pipe end and by further loading of the piston-cylinder units 6 and 7 stretched the pipe. If necessary, the piston rod 18 or the entire piston-cylinder unit 17 can be readjusted in accordance with the path required for the clamping.

Nach dem beschriebenen Aufbringen der Spannkraft auf das Rohrende wird der Stauchdorn 22 durch (nicht dargestellte Mittel) in Pfeilrichtung 26 bewegt, um das zwischen oberer und unterer Matrizenhälfte 4 bzw. 5 eingespannte Rohrende anzustauchen.After applying the described Clamping force on the pipe end, the compression mandrel 22 is moved in the direction of arrow 26 by means (not shown) in order to upset the pipe end clamped between the upper and lower die halves 4 and 5.

Das Rückführen des Querhauptes 3 in seine Öffnungsstellung erfolgt in umgekehrter Reihenfolge. Der Stauchdorn 22 wird in seine Ausgangsstellung zurückgeführt, der auf die Kolben-Zylinder-Einheit 6 und 7 wirkende Druck wird weggenommen und die Ringflächen an der Kolbenstangenseite der Kolben-Zylinder-Einheit werden über die Öffnungen 26 bzw. 27 mit Druck beaufschlagt. Dadurch bewegen sich die Kolben 11 und 12 in ihre obere Endstellung und die Spannkraft auf das Rohrende wird gelöst. Durch Beaufschlagung der Kolben-Zylinder-Einheit 17 oberhalb des Kolbens 23 wird die Kolbenstange 18 mit dem Gelenkpunkt 21 nach unten geführt, wodurch sich die Zug-Druckstangen 19 und 20 spreizen und ein Einknicken der Kniehebel 9, 13 und 10, 14 bewirken. Dadurch wird kurzzeitig das Querhaupt 3 mit der oberen Matrizenhälfte 4 angehoben und die Rohrendenpresse ist zum Entnehmen und erneuten Laden geöffnet.The crosshead 3 is returned to its open position in the reverse order. The compression mandrel 22 is returned to its starting position, the pressure acting on the piston-cylinder unit 6 and 7 is removed and the annular surfaces on the piston rod side of the piston-cylinder unit are pressurized via the openings 26 and 27, respectively. As a result, the pistons 11 and 12 move into their upper end position and the clamping force on the pipe end is released. By acting on the piston-cylinder unit 17 above the piston 23, the piston rod 18 is guided downwards with the articulation point 21, as a result of which the push-pull rods 19 and 20 spread and cause the toggle levers 9, 13 and 10, 14 to buckle. This briefly raises the crosshead 3 with the upper die half 4 and the tube end press is open for removal and reloading.

Selbstverständlich sind alle mechanischen Teile so geführt, daß eine korrekte Geometrie und ein Gleichlauf erhalten bleibt, um in optimaler Weise die notwendigen Kräfte in die entsprechenden Bauteile einzuleiten.Of course, all mechanical parts are designed in such a way that correct geometry and synchronism are maintained in order to optimally introduce the necessary forces into the corresponding components.

Aus Sicherheitsgründen kann es ratsam sein, eine Arretiervorrichtung für das Querhaupt 3 vorzusehen, um dieses für den Fall des Druckflüssigkeitsverlustes gegen Herabfallen zu sichern.For safety reasons, it may be advisable to provide a locking device for the crosshead 3 in order to secure it against falling in the event of pressure fluid loss.

Claims (5)

1. Holding device for the pipe end pieces in a hydraulic pipe end press, which has a C-shaped frame (1) in which the pipe end is held between the upper and the lower matrix half (4, 5) whereby the lower matrix half (5) is held in the pressing table and the upper matrix half (4) is held in the cross piece and the cross piece is movable toward the pressing table with the aid of at least one piston/cylinder unit (6, 7) applying the holding force, characterized by an elbow lever (9, 13, 10, 14) transferring the holding force in its extended position, the one end (9, 10) of which is articulated on the piston (11, 12) of the piston/cylinder unit (6, 7) and the other end of which (13, 14) is articulatedly connected with the cross piece (3) and the elbow joint (15, 16) of which is connected with a further power drive (17) to bend and extend the elbow lever (9, 13, 10, 14).
2. Holding device according to Claim 1, characterized in that for two elbow levers (9, 13, 10, 14) arranged symmetrically adjacent to each other a common power drive (17) is provided for the synchronous bending and extending of the two elbow levers.
3. Holding device according to Claim 1 and 2, characterized in that the power drive (17) for the bending and extending of the elbow lever or levers (9, 13, 10, 14) is a piston/cylinder unit.
4. Holding device according to Claim 2, characterized in that the piston/cylinder unit (17) is arranged between the two piston/cylinder units (6, 7) applying the holding force, with the same direction of effect and the piston force is branched via in each case a drawing and pushing rod (19, 20) communicating with the elbow joint (15, 16) of the elbow lever (9, 13, 10, 14), connected on the one hand with the latter and on the other hand with the piston rod (18) of the piston/cylinder unit (17).
5. Holding device according to Claim 1 to 4, characterized in that the elbow lever or levers (9, 12, 10, 14) in their extended position are secured against buckling.
EP83730001A 1982-01-06 1983-01-04 Device for holding tube ends in a hydraulic press for upsetting tube ends Expired EP0083577B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83730001T ATE12899T1 (en) 1982-01-06 1983-01-04 HOLDING DEVICE FOR THE PIPE END PIECES IN A HYDRAULIC PIPE END PRESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3200361 1982-01-06
DE3200361A DE3200361C2 (en) 1982-01-06 1982-01-06 Holding device for the pipe end pieces in a hydraulic pipe end press

Publications (2)

Publication Number Publication Date
EP0083577A1 EP0083577A1 (en) 1983-07-13
EP0083577B1 true EP0083577B1 (en) 1985-04-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83730001A Expired EP0083577B1 (en) 1982-01-06 1983-01-04 Device for holding tube ends in a hydraulic press for upsetting tube ends

Country Status (4)

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EP (1) EP0083577B1 (en)
JP (1) JPS58119426A (en)
AT (1) ATE12899T1 (en)
DE (1) DE3200361C2 (en)

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Publication number Priority date Publication date Assignee Title
FR2800651B1 (en) * 1999-11-04 2002-01-25 Financ Robolix TUBE END FORMING MACHINE, AND FORMING DEVICE HAVING TWO FORMING MACHINES
DE60113595T2 (en) 2000-06-16 2006-05-18 Nippon Steel Corp. Form closure device and form closure method
JP4706889B2 (en) * 2000-11-01 2011-06-22 東洋製罐株式会社 Can body forming equipment
CN100484746C (en) * 2006-12-26 2009-05-06 西安重型机械研究所 Hydraulic press for thickening drill pipe without excavation
CN102896211A (en) * 2011-12-30 2013-01-30 中山市奥美森工业技术有限公司 Round tube fixture
CN102989818B (en) * 2011-12-31 2015-11-18 奥美森智能装备股份有限公司 A kind of clamping device of Elliptical tube machine

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US2871734A (en) * 1956-02-29 1959-02-03 Western Electric Co Apparatus for heading tubular members
DE2731055A1 (en) * 1976-07-16 1978-01-26 Mannesmann Ag HYDRAULIC PIPE END PRESS

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US2037604A (en) * 1933-06-30 1936-04-14 Thompson Prod Inc Electrical metal gathering machine
DE844241C (en) * 1950-05-31 1952-07-17 Eumuco Ag Fuer Maschb Resilient jig for rods, tubes, etc. like
DE835246C (en) * 1950-06-30 1952-03-31 Rheinische Roehrenwerke A G Automatic clamping device on upsetting presses for processing the ends of elongated bodies, for example the ends of pipes
US3078906A (en) * 1960-05-27 1963-02-26 Western Electric Co Machine for flanging tubular members
DE1240370B (en) * 1962-08-22 1967-05-11 David Etchells Machinery Ltd Horizontal forging or upsetting machine

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Publication number Priority date Publication date Assignee Title
US2871734A (en) * 1956-02-29 1959-02-03 Western Electric Co Apparatus for heading tubular members
DE2731055A1 (en) * 1976-07-16 1978-01-26 Mannesmann Ag HYDRAULIC PIPE END PRESS

Also Published As

Publication number Publication date
ATE12899T1 (en) 1985-05-15
DE3200361C2 (en) 1984-08-30
DE3200361A1 (en) 1983-07-14
EP0083577A1 (en) 1983-07-13
JPS58119426A (en) 1983-07-15

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