EP3006132B1 - Radial press - Google Patents

Radial press Download PDF

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Publication number
EP3006132B1
EP3006132B1 EP15186825.4A EP15186825A EP3006132B1 EP 3006132 B1 EP3006132 B1 EP 3006132B1 EP 15186825 A EP15186825 A EP 15186825A EP 3006132 B1 EP3006132 B1 EP 3006132B1
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EP
European Patent Office
Prior art keywords
yokes
radial press
press according
drive
pressing
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EP15186825.4A
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German (de)
French (fr)
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EP3006132A1 (en
Inventor
Patrick STICKER
Carsten Baumgartner
Eduard Weikum
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Uniflex Hydraulik GmbH
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Uniflex Hydraulik GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B7/00Presses characterised by a particular arrangement of the pressing members
    • B30B7/04Presses characterised by a particular arrangement of the pressing members wherein pressing is effected in different directions simultaneously or in turn
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B1/00Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04Frames; Guides
    • B30B15/048Laminated frame structures

Definitions

  • the present invention relates to a radial press for the centering to a press axis radial deformation of a workpiece, comprising two yokes and a pressing tool which comprises a set in a Jochen defined tool installation space die set with concentrically arranged around the press axis pressing jaws, wherein the two yokes by means of a Drive system along a perpendicular to the press axis drive axis are movable relative to each other and the distance of the press jaws depends on the press axis of the position of the two yokes to each other.
  • the DE 19912976 A1 discloses a yoke press constructed in a different manner, in which acts on the lower yoke a central hydraulic cylinder arranged underneath, the power flow to the upper yoke being ensured by means of a frame with two pull rods arranged laterally outside the tool installation space.
  • the present invention seeks to further improve radial presses of the type specified in terms of their applications, in particular to the effect that in particular the processing of heavy, difficult to handle and / or ground fixed components is facilitated.
  • the two yokes penetrate each other on both sides of the tool installation space in a radial press of the generic type, wherein the drive system arranged two outside of the two penetration zones, synchronously acting Includes drive units which attack at Jochfort algorithmsn.
  • two synchronously acting drive units arranged on both sides of the tool installation space can act directly on the two yokes, namely their yoke extensions located outside the penetration zones.
  • the force required for the pressing of the workpiece can thus act directly between the two yokes by the yokes are moved towards each other in the area of the tool installation space by the same extent as the Jochfort algorithms - under the action of the two drive units - are removed from each other.
  • the two drive units can therefore be arranged at the same height as the tool installation space or the tool installed in it. Or in other words: the two drive units and the tool can be essentially in line. The overall height of the radial press can be minimized accordingly.
  • the height can be reduced to the degree that is predetermined by the yokes - in the open position of the radial press; and correspondingly low above the bottom, the press axis can run. This is crucial for solving the problem discussed above.
  • the two drive units act directly on the two yokes, ie the Jochfortassi, and initiate the pressing force directly into this, the radial press according to the invention can get along without a frame.
  • the invention can even in an increase in precision and reproducibility effect, because a reproducibility impairing compliance of the Frame deleted.
  • the possible omission of a frame can also have an advantageous effect in terms of weight, space requirements and production costs.
  • the two yokes - with suitable design of the penetration zones - can stiffen each other, so that the danger of tilting of the yokes relative to one another is reduced in the case of an asymmetrical placement of the workpiece in the tool offset along the press axis .
  • any technical device by means of which the two concerned Jochfort an can be relatively removed from each other to move the yokes in the area of the tool installation space in the appropriate degree to each other.
  • hydraulic or electrical actuators eg Hydraulic cylinder or electric spindle drives
  • these downstream mechanical power amplifiers eg in the form of wedge drives
  • purely mechanical drive units are conceivable, for example, eccentric.
  • Such two purely mechanical drive units eg eccentric drive units
  • the two drive units preferably have mutually parallel working directions relative to the drive axis. In this case, optimal power ratios arise. In individual cases, however, a non-parallel orientation of the working directions of the two drive units to each other may prove to be expedient, although the resulting drive force also in this case typically runs parallel to the drive axis.
  • the two drive units each comprise at least (so) a hydraulic cylinder
  • an extension of the hydraulic cylinder by extension of the piston rod
  • closing the tool due to the kinematic conditions (closing the tool when moving apart the yoke extensions).
  • an admission of the respective piston working space and not the area smaller piston rod working space
  • maximum pressures can be achieved with given dimensions of the hydraulic cylinder and predetermined hydraulic pressure.
  • the hydraulic cylinder can be designed to be double-acting; or the return stroke can be effected by a return spring.
  • each drive unit comprises a plurality of (functional) parallel drive elements.
  • the individual drive elements of each drive unit can be arranged next to one another in the direction of the press axis.
  • the existing space can be optimally utilized, which favors a particularly compact design of the radial press according to the invention.
  • this development can be advantageous in terms of efficiency, because the number of each activated drive elements (for example, applied hydraulic cylinder) can be selected depending on the task and thus optimally adapted to the latter.
  • the activation of the individual drive elements depending on the respective phase within the press cycle 'done for example, during the closing Leerhubs (and during the opening of the radial press) only one of the drive elements is active, whereas in power pressing all drive elements are active.
  • the yokes each comprise a plurality of lamellae which are parallel to one another and which are held at a distance from one another via spacer elements arranged outside the penetration zones.
  • This training records not only by an optimal material utilization in the sense that can arise for typical in a yoke loading conditions in the slats ideal power flow conditions, but also by particularly attractive production costs, not least from the point of view of a possible modular conception of similar radial presses with different wide yokes.
  • the embodiment of the drive units set out above with a plurality of drive elements connected in parallel with one another is particularly attractive.
  • the lamellae are preferably made of sheet steel with a thickness which is constant over the entire extent of the lamellae; and the individual lamellae preferably all have a matching thickness.
  • the slats are cut out of a steel sheet by means of a laser beam.
  • the spacer elements arranged between the slats are formed by spacer plates whose thickness is slightly greater than the thickness of the slats. To form a block of the slats and the spacer elements arranged between them, known joining techniques (screwing, riveting, pins, gluing, welding, soldering, etc.) can be used.
  • linear guides are preferably provided, which-with the movement axis oriented parallel to the drive axis-act between the two yokes.
  • Such linear guides can be provided in the region of the penetration zones of the two yokes.
  • another placement is conceivable, for example on the Jochfort arrangementsn, for example in the region of the ends.
  • the two yokes can be completely separated from each other.
  • This can be realized in the present radial press according to the invention with comparatively little effort, and in particular when the yokes - according to the embodiment in their penetration areas - are also made lamellar in the area of the yoke extensions.
  • the upper yoke can be lifted upwards from the lower yoke, after the drive units have been removed from the space between the two associated yoke extensions.
  • the attack of the two drive units is preferably separable at least in each case one of the two associated Jochfort engines.
  • the radial press 1 shown in the drawing which serves for the centric radial deformation of a workpiece (not shown), comprises two yokes, namely a lower yoke 2 and an upper yoke 3, and a pressing tool 4.
  • This is conventionally carried out by forming a pressing die set 5 concentric comprises around a press axis X arranged around pressing jaws 6, which is received in a defined between the yokes 2, 3 tool installation space 7.
  • the two yokes 2, 3 are movable relative to one another along a drive axis A perpendicular to the press axis X. Depending on the position of the two yokes 2, 3 to each other, the distance of the pressing jaws 6 to the pressing axis X.
  • the two yokes 2, 3 penetrate each other like a comb. Outside the two penetration zones D, accordingly, there are two end yoke extensions 8 of the lower yoke 2 above the yoke extensions 9 provided on the upper yoke 3 at the end.
  • the drive system by means of which the two yokes 2, 3 can be moved relative to one another along the drive axis A, comprises two drive units 10 in the form of double-acting hydraulic cylinders arranged outside the two penetration zones D and acting on the two respectively associated yoke extensions 8, 9 11, whose respective working direction H is oriented parallel to the drive axis A.
  • a loading of the respective piston-side working space (“piston working space”) has the effect of closing the press; to open the press in contrast, the piston rod-side working spaces (“piston rod work spaces”) acted upon.
  • the two yokes 2, 3 each comprise a plurality of mutually parallel lamellae 12.
  • spacer elements 14 formed by spacer plates 13 are received between the slats 12, by means of which the slats 12 are held at a predetermined distance from one another.
  • the blocks formed by the stacked lamellae 12 and spacer plates 13 are laterally encompassed by a clip-like shoe 16 laterally and at the opposite Jochfortsatz side, wherein the respective hydraulic cylinder 11 is supported on the two respectively associated shoes 16 ,
  • the shoes 16 are thus further designed specifically with regard to the connection of the respective hydraulic cylinder 11 (or another drive element).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)

Description

Die vorliegende Erfindung betrifft eine Radialpresse für die zu einer Pressachse zentrische Radialverformung eines Werkstücks, mit zwei Jochen und einem Presswerkzeug, welches einen in einem zwischen den Jochen definierten Werkzeugeinbauraum aufgenommenen Pressbackensatz mit konzentrisch um die Pressachse herum angeordneten Pressbacken umfasst, wobei die beiden Joche mittels eines Antriebssystems längs einer auf der Pressachse senkrecht stehenden Antriebsachse relativ zueinander bewegbar sind und der Abstand der Pressbacken zur Pressachse von der Stellung der beiden Joche zueinander abhängt.The present invention relates to a radial press for the centering to a press axis radial deformation of a workpiece, comprising two yokes and a pressing tool which comprises a set in a Jochen defined tool installation space die set with concentrically arranged around the press axis pressing jaws, wherein the two yokes by means of a Drive system along a perpendicular to the press axis drive axis are movable relative to each other and the distance of the press jaws depends on the press axis of the position of the two yokes to each other.

Radialpressen der vorstehend angegebenen Art, sog. "Jochpressen", kommen für diverse Anwendungen zum Einsatz, beispielsweise für das Verbinden von Armaturen mit Schlauchabschnitten im Rahmen der Herstellung einbaufertiger Hydraulik-Schlauchleitungen. Eine verbreite Bauweise ist beispielsweise aus der DE 4135465 A1 bekannt. Bei dieser rahmenlosen Jochpresse durchdringen zwei Zugstangen, welche endseitig an dem oberen Joch fixiert sind und mit ihrem gegenüberliegenden unteren Ende jeweils mit dem Kolben eines Hydraulikzylinders in Verbindung stehen, das untere Joch seitlich außerhalb des Werkzeugeinbauraumes. Die DE 19912976 A1 offenbart eine andersartig aufgebaute Jochpresse, bei der auf das untere Joch ein unter diesem angeordneter zentraler Hydraulikzylinder wirkt, wobei der Kraftfluss zum Oberjoch über einen Rahmen mit zwei seitlich außerhalb des Werkzeugeinbauraumes angeordneten Zugstangen sichergestellt ist.Radial presses of the type specified above, so-called "yoke presses", are used for various applications, for example for connecting fittings with hose sections in the production of ready-to-install hydraulic hose lines. A widespread design is for example from the DE 4135465 A1 known. In this frameless yoke press penetrate two tie rods, which are fixed at the end to the upper yoke and communicate with its opposite lower end in each case with the piston of a hydraulic cylinder, the lower yoke laterally outside of the tool installation space. The DE 19912976 A1 discloses a yoke press constructed in a different manner, in which acts on the lower yoke a central hydraulic cylinder arranged underneath, the power flow to the upper yoke being ensured by means of a frame with two pull rods arranged laterally outside the tool installation space.

Gattungsgemäße Radialpressen haben sich für typische Anwendungen in der Praxis bewährt. Bei sachgerechter Anwendung lassen sich beispielsweise langlebige, sehr hohen Anforderungen genügende Verbindungen zwischen zwei Bauteilen (z.B. Schlauchabschnitt und Anschlussarmatur) herstellen.Generic radial presses have been proven for typical applications in practice. When used properly, for example, long-lasting, very high-quality connections between two components (for example, hose section and connection fitting) can be produced.

Für das Radialverpressen bestimmter Bauteile unter Verwendung der vorbekannten, als Jochpressen ausgeführten Radialpressen ist allerdings nachteilig, dass die Bauteile hierfür um ein erhebliches Maß vom Boden (auf das Niveau der Pressachse) abgehoben werden müssen. Dies führt insbesondere bei langen und schweren, schwer zu handhabbaren und/oder bodennah fixierten Bauteilen zu Problemen.For the radial compression of certain components using the previously known, designed as a yoke presses radial presses is disadvantageous, however, that the components for this to a considerable extent from the ground (to the level of the press axis) must be lifted. This leads to problems especially with long and heavy, difficult to handle and / or ground-fixed components.

Im Lichte dieses Standes der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, Radialpressen der eingangs angegebenen Art hinsichtlich ihrer Einsatzmöglichkeiten weiter zu verbessern, und zwar insbesondere dahingehend, dass insbesondere die Bearbeitung schwerer, schwer handhabbarer und/oder bodennah fixierter Bauteile erleichtert wird.In the light of this prior art, the present invention seeks to further improve radial presses of the type specified in terms of their applications, in particular to the effect that in particular the processing of heavy, difficult to handle and / or ground fixed components is facilitated.

Gelöst wird die vorstehend angegebene Aufgabenstellung gemäß der vorliegenden Erfindung, indem bei einer Radialpresse der gattungsgemäßen Art die beiden Joche einander beidseits des Werkzeugeinbauraumes durchdringen, wobei das Antriebssystem zwei außerhalb der beiden Durchdringungszonen angeordnete, synchron wirkende Antriebseinheiten umfasst, welche an Jochfortsätzen angreifen.The above object is achieved according to the present invention by the two yokes penetrate each other on both sides of the tool installation space in a radial press of the generic type, wherein the drive system arranged two outside of the two penetration zones, synchronously acting Includes drive units which attack at Jochfortsätzen.

Bei der erfindungsgemäßen Radialpresse können demnach zwei synchron wirkende, beidseits des Werkzeugeinbauraumes angeordnete Antriebseinheiten unmittelbar auf die beiden Joche, nämlich deren außerhalb der Durchdringungszonen liegende Jochfortsätze, wirken. Die für das Verpressen des Werkstücks erforderliche Kraft kann somit unmittelbar zwischen den beiden Jochen wirken, indem die Joche im Bereich des Werkzeugeinbauraumes um das gleiche Maße aufeinander zu bewegt werden, wie die Jochfortsätze - unter der Wirkung der beiden Antriebseinheiten - voneinander entfernt werden. Die beiden Antriebseinheiten können demnach auf der gleichen Höhe angeordnet werden wie der Werkzeugeinbauraum bzw. das in diesem eingebaute Werkzeug. Oder mit anderen Worten: die beiden Antriebseinheiten und das Werkzeug können im Wesentlichen auf einer Linie liegen. Die Bauhöhe der Radialpresse lässt sich demgemäß minimieren. Idealerweise lässt sich die Bauhöhe auf das Maß reduzieren, das durch die Joche - in der geöffneten Stellung der Radialpresse - vorgegeben ist; und dementsprechend niedrig oberhalb des Bodens kann die Pressachse verlaufen. Dies ist für die Lösung der vorstehend erörterten Problematik entscheidend. Hinzu kommt, dass, weil die beiden Antriebseinheiten unmittelbar auf die beiden Joche, d.h. die Jochfortsätze, wirken und die Presskraft unmittelbar in diese einleiten, die erfindungsgemäße Radialpresse ohne Rahmen auskommen kann. Damit kann sich die Erfindung sogar in einer Steigerung der Präzision und Reproduzierbarkeit auswirken, weil eine die Reproduzierbarkeit beeinträchtigende Nachgiebigkeit des Rahmens entfällt. Der mögliche Wegfall eines Rahmens kann sich zudem vorteilhaft auswirken im Hinblick auf das Gewicht, den Raumbedarf und die Herstellungskosten. Schließlich ist als möglicher praxisrelevanter Vorteil anzuführen, dass die beiden Joche - bei geeigneter Ausgestaltung der Durchdringungszonen - einander gegenseitig aussteifen können, so dass bei einer asymmetrischen, längs der Pressachse versetzten Platzierung des Werkstücks in dem Werkzeug die Gefahr eines Verkantens der Joche relativ zueinander reduziert ist. Eine solche wechselseitige Aussteifung der beiden Joche gegeneinander im Bereich von Durchdringungszonen, welche beidseits des Werkzeugeinbauraumes angeordnet sind und in denen sich die beiden Joche wechselseitig durchdringen bzw. kreuzen, und die hierdurch mögliche entsprechende wechselseitige Führung der Joche aneinander können im Übrigen mit den geschilderten Vorteilen auch bei solchen (rahmenlosen oder rahmenbehafteten) Radialpressen zum Einsatz kommen, bei denen das Antriebssystem konventionell (d.h. entsprechend dem einleitend dargelegten Stand der Technik) ausgeführt ist, wobei in diesem Falle auch die für die erfindungsgemäße Radialpresse charakteristischen Jochfortsätze entfallen können.Accordingly, in the radial press according to the invention, two synchronously acting drive units arranged on both sides of the tool installation space can act directly on the two yokes, namely their yoke extensions located outside the penetration zones. The force required for the pressing of the workpiece can thus act directly between the two yokes by the yokes are moved towards each other in the area of the tool installation space by the same extent as the Jochfortsätze - under the action of the two drive units - are removed from each other. The two drive units can therefore be arranged at the same height as the tool installation space or the tool installed in it. Or in other words: the two drive units and the tool can be essentially in line. The overall height of the radial press can be minimized accordingly. Ideally, the height can be reduced to the degree that is predetermined by the yokes - in the open position of the radial press; and correspondingly low above the bottom, the press axis can run. This is crucial for solving the problem discussed above. In addition, because the two drive units act directly on the two yokes, ie the Jochfortsätze, and initiate the pressing force directly into this, the radial press according to the invention can get along without a frame. Thus, the invention can even in an increase in precision and reproducibility effect, because a reproducibility impairing compliance of the Frame deleted. The possible omission of a frame can also have an advantageous effect in terms of weight, space requirements and production costs. Finally, as a possible practice-relevant advantage, it should be mentioned that the two yokes - with suitable design of the penetration zones - can stiffen each other, so that the danger of tilting of the yokes relative to one another is reduced in the case of an asymmetrical placement of the workpiece in the tool offset along the press axis , Such a mutual stiffening of the two yokes against each other in the area of penetration zones, which are arranged on both sides of the tool installation space and in which the two yokes interpenetrate or intersect, and the thus possible corresponding mutual guidance of the yokes together, by the way, with the described advantages also be used in such (frameless or frame-like) radial presses in which the drive system is conventionally (ie according to the introductory state of the art) executed, in which case it is also possible to eliminate the Jochfortsätze characteristic of the radial press according to the invention.

Im Sinne der vorliegenden Erfindung ist als Antriebseinheit, welche an den beiden zugeordneten Jochfortsätzen angreift, jede technische Einrichtung zu verstehen, mittels derer sich die beiden betreffenden Jochfortsätze relativ voneinander entfernen lassen, um die Joche im Bereich des Werkzeugeinbauraumes im entsprechenden Maß aufeinander zu zu bewegen. In Betracht kommen insbesondere hydraulische oder elektrische Aktoren (z.B. Hydraulikzylinder bzw. elektrische Spindelantriebe), ggf. mit diesen nachgeschalteten mechanischen Kraftverstärkern (z.B. in Form von Keilgetrieben). Aber auch rein mechanische Antriebseinheiten sind denkbar, beispielsweise Exzenter. Solche zwei rein mechanischen Antriebseinheiten (z.B. Exzenter-Antriebseinheiten) würden dann bevorzugt - über eine Koppeleinrichtung miteinander gekoppelt - von einem einzigen gemeinsamen Aktor (z.B. Hydraulikzylinder) betätigt.For the purposes of the present invention is to be understood as a drive unit which acts on the two associated Jochfortsätzen, any technical device by means of which the two concerned Jochfortsätze can be relatively removed from each other to move the yokes in the area of the tool installation space in the appropriate degree to each other. In particular, hydraulic or electrical actuators (eg Hydraulic cylinder or electric spindle drives), possibly with these downstream mechanical power amplifiers (eg in the form of wedge drives). But also purely mechanical drive units are conceivable, for example, eccentric. Such two purely mechanical drive units (eg eccentric drive units) would then be preferred - coupled to one another via a coupling device - actuated by a single common actuator (eg hydraulic cylinder).

Vorzugsweise weisen die beiden Antriebseinheiten zueinander und zur Antriebsachse parallele Arbeitsrichtungen auf. In diesem Falle ergeben sich optimale Kraftverhältnisse. Im Einzelfall kann sich indessen auch eine nicht-parallele Orientierung der Arbeitsrichtungen der beiden Antriebseinheiten zueinander als zweckmäßig erweisen, wobei allerdings die resultierende Antriebskraft auch in diesem Fall typischerweise parallel zur Antriebsachse verläuft.The two drive units preferably have mutually parallel working directions relative to the drive axis. In this case, optimal power ratios arise. In individual cases, however, a non-parallel orientation of the working directions of the two drive units to each other may prove to be expedient, although the resulting drive force also in this case typically runs parallel to the drive axis.

Umfassen die beiden Antriebseinheiten jeweils mindestens (s.o.) einen Hydraulikzylinder, so erweist sich als positiv, dass durch die kinematischen Verhältnisse (Schließen des Werkzeugs beim Auseinanderfahren der Jochfortsätze) eine Verlängerung des Hydraulikzylinders (durch Ausfahren der Kolbenstange) dem Schließen des Werkzeugs entsprechen kann. Demgemäß erfolgt zum Schließen der Radialpresse, d.h. für das Pressen des Werkstücks, eine Beaufschlagung des jeweiligen Kolben-Arbeitsraumes (und nicht des flächenmäßig kleineren Kolbenstangen-Arbeitsraumes), wodurch bei gegebenen Abmessungen des Hydraulikzylinders und vorgegebenem Hydraulikdruck maximale Presskräfte erzielbar sind. Auch dies ist ein Aspekt der Bereitstellung einer besonders kompakten und trotzdem leitungsfähigen Radialpresse. Für den dem Öffnen der Radialpresse dienenden Rückhub kann der Hydraulikzylinder doppeltwirkend ausgebildet sein; oder der Rückhub kann durch eine Rückstellfeder bewirkt werden.If the two drive units each comprise at least (so) a hydraulic cylinder, it proves to be positive that an extension of the hydraulic cylinder (by extension of the piston rod) can correspond to closing the tool due to the kinematic conditions (closing the tool when moving apart the yoke extensions). Accordingly, to close the radial press, ie for the pressing of the workpiece, an admission of the respective piston working space (and not the area smaller piston rod working space), whereby maximum pressures can be achieved with given dimensions of the hydraulic cylinder and predetermined hydraulic pressure. Again, this is one aspect of Provision of a particularly compact yet conductive radial press. For the return stroke serving to open the radial press, the hydraulic cylinder can be designed to be double-acting; or the return stroke can be effected by a return spring.

Eine andere bevorzugte Weiterbildung der vorliegenden Erfindung zeichnet sich dadurch aus, dass jede Antriebseinheit eine Mehrzahl von (funktional) parallel geschalteten Antriebselementen umfasst. Insbesondere können die einzelnen Antriebselemente jeder Antriebseinheit in Richtung der Pressachse nebeneinander angeordnet sein. So kann zum einen der vorhandene Bauraum optimal genutzt werden, was eine besonders kompakte Ausführung der erfindungsgemäßen Radialpresse begünstigt. Weiterhin kann diese Weiterbildung hinsichtlich der Effizienz vorteilhaft sein, weil die Zahl der jeweils aktivierten Antriebselemente (z.B. beaufschlagten Hydraulikzylinder) in Abhängigkeit von der jeweiligen Aufgabe gewählt und somit an letztere optimal angepasst werden kann. Auch kann die Aktivierung der einzelnen Antriebselemente in Abhängigkeit von der jeweiligen Phase innerhalb des Presszyklus' erfolgen, beispielsweise indem während des Schließen-Leerhubs (sowie während des Öffnens der Radialpresse) nur eines der Antriebselemente aktiv ist, wohingegen beim Kraftpressen sämtliche Antriebselemente aktiv sind.Another preferred development of the present invention is characterized in that each drive unit comprises a plurality of (functional) parallel drive elements. In particular, the individual drive elements of each drive unit can be arranged next to one another in the direction of the press axis. Thus, on the one hand, the existing space can be optimally utilized, which favors a particularly compact design of the radial press according to the invention. Furthermore, this development can be advantageous in terms of efficiency, because the number of each activated drive elements (for example, applied hydraulic cylinder) can be selected depending on the task and thus optimally adapted to the latter. Also, the activation of the individual drive elements depending on the respective phase within the press cycle 'done, for example, during the closing Leerhubs (and during the opening of the radial press) only one of the drive elements is active, whereas in power pressing all drive elements are active.

In mehrfacher Hinsicht ist besonders vorteilhaft, wenn die Joche jeweils eine Mehrzahl von zueinander parallelen Lamellen umfassen, welche über außerhalb der Durchdringungszonen angeordnete Distanzelemente auf Abstand zueinander gehalten werden. Diese Weiterbildung zeichnet sich nicht nur durch eine optimale Materialausnutzung in dem Sinne aus, dass sich für in einer Jochpresse typische Belastungszustände in den Lamellen ideale Kraftflussverhältnisse ergeben können, sondern auch durch besonders attraktive Herstellungskosten, nicht zuletzt auch unter dem Gesichtspunkt einer möglichen Baukasten-Konzeption ähnlicher Radialpressen mit unterschiedlich breiten Jochen. Gerade im Hinblick hierauf ist auch die vorstehend dargelegte Ausführung der Antriebseinheiten mit mehreren zueinander parallel geschalteten Antriebselementen besonders attraktiv. Die Lamellen bestehen bevorzugt aus Stahlblech mit einer Dicke, die über die gesamte Erstreckung der Lamellen konstant ist; und die einzelnen Lamellen weisen bevorzugt alle eine übereinstimmende Dicke auf. Besonders vorteilhaft werden die Lamellen mittels eines Laserstrahls aus einem Stahlblech herausgeschnitten. Besonders bevorzugt sind die zwischen den Lamellen angeordneten Distanzelemente durch Distanzplatten gebildet, deren Dicke geringfügig größer ist als die Dicke der Lamellen. Zur Bildung eines Blocks aus den Lamellen und den zwischen diesen angeordneten Distanzelementen sind bekannten Fügetechniken (Verschrauben, Nieten, Stiften, Kleben, Schweißen, Löten etc.) einsetzbar.In many respects, it is particularly advantageous if the yokes each comprise a plurality of lamellae which are parallel to one another and which are held at a distance from one another via spacer elements arranged outside the penetration zones. This training records not only by an optimal material utilization in the sense that can arise for typical in a yoke loading conditions in the slats ideal power flow conditions, but also by particularly attractive production costs, not least from the point of view of a possible modular conception of similar radial presses with different wide yokes. Especially with regard to this, the embodiment of the drive units set out above with a plurality of drive elements connected in parallel with one another is particularly attractive. The lamellae are preferably made of sheet steel with a thickness which is constant over the entire extent of the lamellae; and the individual lamellae preferably all have a matching thickness. Particularly advantageously, the slats are cut out of a steel sheet by means of a laser beam. Particularly preferably, the spacer elements arranged between the slats are formed by spacer plates whose thickness is slightly greater than the thickness of the slats. To form a block of the slats and the spacer elements arranged between them, known joining techniques (screwing, riveting, pins, gluing, welding, soldering, etc.) can be used.

Im Rahmen der vorliegenden Erfindung sind bevorzugt Linearführungen vorgesehen, welche - mit parallel zu der Antriebsachse orientierter Bewegungsachse - zwischen den beiden Jochen wirken. Solche Linearführungen können im Bereich der Durchdringungszonen der beiden Joche vorgesehen sein. Allerdings ist auch eine andere Platzierung denkbar, beispielsweise an den Jochfortsätzen, z.B. im Bereich von deren Enden.In the context of the present invention, linear guides are preferably provided, which-with the movement axis oriented parallel to the drive axis-act between the two yokes. Such linear guides can be provided in the region of the penetration zones of the two yokes. However, another placement is conceivable, for example on the Jochfortsätzen, for example in the region of the ends.

Nach einer wiederum anderen bevorzugten Weiterbildung der vorliegenden Erfindung ist vorgesehen, dass die beiden Joche vollständig voneinander getrennt werden können. Dies lässt sich bei der vorliegenden erfindungsgemäßen Radialpresse mit vergleichsweise geringem Aufwand realisieren, und zwar insbesondere dann, wenn die Joche - entsprechend der Ausführung in ihren Durchdringungsbereichen - auch im Bereich der Jochfortsätze lamellenartig ausgeführt sind. So kann in besonders bevorzugter Weise das obere Joch nach oben hin von dem unteren Joch abgehoben werden, nachdem die Antriebseinheiten aus dem Raum zwischen den beiden jeweils zugeordneten Jochfortsätzen entfernt wurden. In diesem Sinne ist somit der Angriff der beiden Antriebseinheiten bevorzugt an zumindest jeweils einem der beiden jeweils zugeordneten Jochfortsätze trennbar. Der Vorteil einer solchen Radialpresse ist, dass - bei teilbarer Ausführung auch des Werkzeugs - eine Radialverpressung an beliebigen Positionen des Werkstücks erfolgen kann, also beispielsweise auch bei einem - von oben in die vollständig geöffnete Radialpresse einzulegenden - endlos verlegten Rohr.According to yet another preferred embodiment of the present invention, it is provided that the two yokes can be completely separated from each other. This can be realized in the present radial press according to the invention with comparatively little effort, and in particular when the yokes - according to the embodiment in their penetration areas - are also made lamellar in the area of the yoke extensions. Thus, in a particularly preferred manner, the upper yoke can be lifted upwards from the lower yoke, after the drive units have been removed from the space between the two associated yoke extensions. In this sense, therefore, the attack of the two drive units is preferably separable at least in each case one of the two associated Jochfortsätze. The advantage of such a radial press is that - with divisible design of the tool - a radial compression can take place at any position of the workpiece, so for example in a - inserted from above in the fully open radial press - endlessly laid pipe.

Im Folgenden wird die vorliegende Erfindung anhand eines in der Zeichnung veranschaulichten bevorzugten Ausführungsbeispiels näher erläutert. Die Zeichnung zeigt dabei - in einer perspektivischen Ansicht - das entsprechende Ausführungsbeispiel in einem teilweise geschlossenen Zustand.In the following, the present invention will be explained in more detail with reference to a preferred embodiment illustrated in the drawing. The drawing shows - in a perspective view - the corresponding embodiment in a partially closed state.

Die in der Zeichnung gezeigte, der zentrischen Radialverformung eines (nicht gezeigten) Werkstücks dienende Radialpresse 1 umfasst zwei Joche, nämlich ein unteres Joch 2 und ein oberes Joch 3, sowie ein Presswerkzeug 4. Dieses ist konventionell ausgeführt, indem es einen Pressbackensatz 5 mit konzentrisch um eine Pressachse X herum angeordneten Pressbacken 6 umfasst, der in einem zwischen den Jochen 2, 3 definierten Werkzeugeinbauraum 7 aufgenommen ist. Die beiden Joche 2, 3 sind längs einer auf der Pressachse X senkrecht stehenden Antriebsachse A relativ zueinander bewegbar. In Abhängigkeit von der Stellung der beiden Joche 2, 3 zueinander verändert sich der Abstand der Pressbacken 6 zur Pressachse X.The radial press 1 shown in the drawing, which serves for the centric radial deformation of a workpiece (not shown), comprises two yokes, namely a lower yoke 2 and an upper yoke 3, and a pressing tool 4. This is conventionally carried out by forming a pressing die set 5 concentric comprises around a press axis X arranged around pressing jaws 6, which is received in a defined between the yokes 2, 3 tool installation space 7. The two yokes 2, 3 are movable relative to one another along a drive axis A perpendicular to the press axis X. Depending on the position of the two yokes 2, 3 to each other, the distance of the pressing jaws 6 to the pressing axis X.

Beidseits des Werkzeugeinbauraumes 7 durchdringen die beiden Joche 2, 3 einander kammartig. Außerhalb der beiden Durchdringungszonen D liegen demgemäß zwei endseitige Jochfortsätze 8 des unteren Jochs 2 oberhalb der endseitig an dem oberen Joch 3 vorgesehenen Jochfortsätze 9.On both sides of the tool installation space 7, the two yokes 2, 3 penetrate each other like a comb. Outside the two penetration zones D, accordingly, there are two end yoke extensions 8 of the lower yoke 2 above the yoke extensions 9 provided on the upper yoke 3 at the end.

Das Antriebssystem, mittels dessen sich die beiden Joche 2, 3 längs der Antriebsachse A relativ zueinander bewegen lassen, umfasst zwei außerhalb der beiden Durchdringungszonen D angeordnete, an den beiden jeweils zugeordneten Jochfortsätzen 8, 9 angreifende, synchron wirkende Antriebseinheiten 10 in Form von doppeltwirkenden Hydraulikzylindern 11, deren jeweilige Arbeitsrichtung H zur Antriebsachse A parallel orientiert ist. Eine Beaufschlagung des jeweiligen kolbenseitigen Arbeitsraumes ("Kolben-Arbeitsraumes") wirkt sich im Sinne eines Schließens der Presse aus; zum Öffnen der Presse werden demgegenüber die kolbenstangenseitigen Arbeitsräume ("Kolbenstangen-Arbeitsräume") beaufschlagt.The drive system, by means of which the two yokes 2, 3 can be moved relative to one another along the drive axis A, comprises two drive units 10 in the form of double-acting hydraulic cylinders arranged outside the two penetration zones D and acting on the two respectively associated yoke extensions 8, 9 11, whose respective working direction H is oriented parallel to the drive axis A. A loading of the respective piston-side working space ("piston working space") has the effect of closing the press; to open the press in contrast, the piston rod-side working spaces ("piston rod work spaces") acted upon.

Die beiden Joche 2, 3 umfassen jeweils eine Mehrzahl von zueinander parallelen Lamellen 12. Mit Ausnahme der Durchdringungszonen D, d.h. sowohl im Bereich des Werkzeugeinbauraumes 7 als auch im Bereich der Jochfortsätze 8, 9, sind zwischen den Lamellen 12 durch Distanzplatten 13 gebildete Distanzelemente 14 aufgenommen, mittels derer die Lamellen 12 auf einem vorgegebenen Abstand zueinander gehalten werden. Die Lamellen 12 und die Distanzplatten 13, deren Dicke geringfügig größer ist als die Dicke der Lamellen 12, bilden im Bereich des Werkzeugeinbauraumes 7 und in den Bereichen der beiden Jochfortsätze 8, 9 jeweils einen Block, zu welchem Zweck sie mittels der Bolzen 15 gegeneinander verspannt sind. Im Bereich der Jochfortsätze 8, 9 sind die durch die gestapelten Lamellen 12 und Distanzplatten 13 gebildeten Blöcke seitlich sowie an der dem jeweils gegenüberliegenden Jochfortsatz zugewandten Seite durch einen klammerartigen Schuh 16 umgriffen, wobei der jeweilige Hydraulikzylinder 11 sich an den beiden jeweils zugeordneten Schuhen 16 abstützt. Die Schuhe 16 sind somit weiterhin speziell im Hinblick auf den Anschluss des jeweiligen Hydraulikzylinders 11 (bzw. eines sonstigen Antriebselements) ausgebildet.The two yokes 2, 3 each comprise a plurality of mutually parallel lamellae 12. With the exception of the penetration zones D, i. both in the area of the tool installation space 7 and in the area of the yoke extensions 8, 9, spacer elements 14 formed by spacer plates 13 are received between the slats 12, by means of which the slats 12 are held at a predetermined distance from one another. The lamellae 12 and the spacer plates 13, the thickness of which is slightly larger than the thickness of the lamellae 12, form a block in the area of the tool installation space 7 and in the areas of the two yoke extensions 8, 9, for which purpose they are braced against one another by means of the bolts 15 are. In the region of the Jochfortsätze 8, 9, the blocks formed by the stacked lamellae 12 and spacer plates 13 are laterally encompassed by a clip-like shoe 16 laterally and at the opposite Jochfortsatz side, wherein the respective hydraulic cylinder 11 is supported on the two respectively associated shoes 16 , The shoes 16 are thus further designed specifically with regard to the connection of the respective hydraulic cylinder 11 (or another drive element).

Um die beiden Joche 2, 3 vollständig voneinander trennen zu können, wäre nach den obigen Ausführungen eine Modifikation des gezeigten Ausführungsbeispiels dahingehend vorzunehmen, dass sich die im Bereich der Jochfortsätze 8, 9 vorgesehenen Distanzplatten 13 (mitsamt der beiden Hydraulikzylinder 11) leicht entfernen lassen. Eine in dieser Hinsicht günstige Ausgestaltung sieht vor, dass die Distanzplatten 13 und der jeweilige klammerartige Schuh 16 ein integrales Bauteil bilden, in dessen zwischen den Distanzplatten vorgesehenen Nuten die Lamellen 12 des betreffenden Jochs 2, 3 einlegbar sind.In order to be able to completely separate the two yokes 2, 3 from one another, a modification of the exemplary embodiment shown would be made such that the spacer plates 13 provided in the region of the yoke extensions 8, 9 (together with the two Hydraulic cylinder 11) can be easily removed. An embodiment which is favorable in this regard provides that the spacer plates 13 and the respective clip-like shoe 16 form an integral component in whose grooves provided between the spacer plates the lamellae 12 of the relevant yoke 2, 3 can be inserted.

Claims (13)

  1. A radial press (1) for the radial forming of a workpiece centrally to a pressing axis (X), with two yokes (2, 3) and a pressing tool (4), which comprises a pressing jaw set (5) with pressing jaws (6) concentrically arranged about the pressing axis (X), the pressing jaw set (5) being received in a tool installation space (7) defined between the yokes (2, 3), wherein the two yokes (2, 3) are movable relative to each other by means of a drive system along a drive axis (A) extending vertically to the pressing axis (X) and the distance of the pressing jaws (6) to the pressing axis (X) depends on the position of the two yokes (2, 3) relative to each other,
    characterised in that
    the two yokes (2, 3) penetrate each other on both sides of the tool installation space (7), wherein the drive system comprises two synchronously effective drive units (10) arranged outside the two penetration zones (D), which drive units (10) engage at yoke extensions (8, 9).
  2. The radial press according to claim 1, characterised in that the two drive units (10) have working directions (H) both parallel to each other and to the drive axis (A).
  3. The radial press according to claim 1 or claim 2, characterised in that each drive unit (10) comprises a plurality of drive elements connected in parallel.
  4. The radial press according to claim 3, characterised in that the individual drive elements are adjacently arranged in direction of the pressing axis (X).
  5. The radial press according to one of claims 1 to 4, characterised in that the yokes (2, 3) each comprise a plurality of lamellae (12), which are kept at a distance from each other via distance elements (14) with the exception of those arranged in the area of the penetration zone (D).
  6. The radial press according to claim 5, characterised in that the lamellae (12) consist of sheet steel of matching thickness.
  7. The radial press according to claim 5 or claim 6, characterised in that the distance elements (14) are formed by distance plates (13), the thickness of which is marginally larger than the thickness of the lamellae (12).
  8. The radial press according to one of claims 5 to 7, characterised in that clamp-like shoes (16) are provided in the area of the yoke extensions (8, 9), each of which encompasses at least partially a block formed by the lamellae (12) and the distance elements (14).
  9. The radial press according to one of claims 1 to 8, characterised in that the drive units (10) comprise hydraulic or electric actuators and mechanical strength boosters arranged downstream of the same.
  10. The radial press according to one of claims 1 to 9, characterised in that the driving elements (10) comprise hydraulic cylinders (11), wherein impacting the respective piston work space has an effect in terms of closing the radial press (1).
  11. The radial press according to one of claims 1 to 10, characterised in that the yokes (2, 3) can be completely separated from each other.
  12. The radial press according to claim 11, characterised in that the engagement of the two drive units (10) on at least respectively one of the yoke extensions (8, 9) can be separated.
  13. The radial press according to one of claims 1 to 12, characterised in that linear guides with a motion axis oriented parallel to the drive axis (A) act between the two yokes (2, 3).
EP15186825.4A 2014-10-07 2015-09-25 Radial press Active EP3006132B1 (en)

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DE102018115744A1 (en) 2018-06-29 2020-01-02 Uniflex-Hydraulik Gmbh Radial press and method for joining two components using radial pressure
DE102018115750B3 (en) 2018-06-29 2019-07-11 Uniflex-Hydraulik Gmbh Radial press and method for joining two components by means of radial pressing
MX2021011855A (en) 2019-03-29 2021-10-22 Uniflex Hydraulik Gmbh Method for producing a plurality of composite structures.
DE102020125890B3 (en) 2020-10-02 2022-03-10 Uniflex - Hydraulik GmbH radial press
DE202022102074U1 (en) 2022-04-19 2022-04-27 Uniflex - Hydraulik GmbH radial press
DE102022109427B4 (en) 2022-04-19 2024-04-25 Uniflex - Hydraulik GmbH Radial press

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DE4135465A1 (en) * 1991-10-28 1993-04-29 Schroeck Peter Dipl Ing Fh RADIAL PRESS WITH TWO RADIAL MOVABLE PRESS YEARS
DE19912976C2 (en) * 1999-03-23 2001-12-13 Uniflex Hydraulik Gmbh Radial press
DE102009057726A1 (en) * 2009-12-10 2011-06-16 Uniflex-Hydraulik Gmbh radial press

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