EP0504490A1 - Crimping tool for crimping tube connections - Google Patents

Crimping tool for crimping tube connections Download PDF

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Publication number
EP0504490A1
EP0504490A1 EP91121960A EP91121960A EP0504490A1 EP 0504490 A1 EP0504490 A1 EP 0504490A1 EP 91121960 A EP91121960 A EP 91121960A EP 91121960 A EP91121960 A EP 91121960A EP 0504490 A1 EP0504490 A1 EP 0504490A1
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EP
European Patent Office
Prior art keywords
parts
pressing
connecting plates
pressing tongs
molded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91121960A
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German (de)
French (fr)
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EP0504490B1 (en
Inventor
Karl-Georg Homm
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Hewing GmbH
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Hewing GmbH
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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5367—Coupling to conduit

Definitions

  • the invention relates to a pressing tongs for pressing pipe connections, in particular for pipes made of composite materials, in an embodiment according to the preamble of claim 1.
  • Known pressing tongs of this type (DE 27 25 280 A1) have a two-part mold insert, in which the parts of the mold insert extend over a central angle of 180 °.
  • the parting line between the two molded parts coincides with the longitudinal center plane of the pressing tongs, to which the two pivot axes for the pressing jaws are arranged in mirror image.
  • the invention has for its object to provide a pressing tongs of the type mentioned, in which the molded parts act more uniformly on the parts of the pipe connection to be pressed and provide pressed pipe connections with particularly high dimensional accuracy.
  • the invention solves this problem by a pressing tongs with the features of claim 1. With regard to further essential configurations, reference is made to claims 2 to 11.
  • the pressing tongs according to the invention produce pressed pipe connections, in particular with a circular basic shape are particularly accurate.
  • the forces used for pressing through the molded parts are better distributed over the circumference into the parts of the pipe connection, with the result that, while avoiding crushing of the material and the associated damage to the material structure, clean shaping takes place with a largely radial orientation of the acting forces.
  • the pressing tongs illustrated in the drawing for the pressing of pipe connections, in particular for pipes made of composite materials, comprise two pressing jaws 1, 2, which are connected to one another by connecting plates 3, 4 arranged on both sides and can be pivoted in opposite directions about the parallel pivoting axes 5, 6 on the connecting plates 3 , 4 are supported.
  • the pressing tongs also include a mold insert 7, which is formed by three molded parts 8, 9, 10, which together define a molded opening 11 in the closed position.
  • One molded part 8, 9 is assigned to a pressing jaw 1, 2, and the third molded part 10 is supported in a stationary manner between the connecting plates 3, 4 of the pressing tongs.
  • the fixedly supported third molded part (10) has a symmetrical arrangement with respect to the longitudinal center plane 12 of the pressing tongs and has a central angle that is either the same as the central angle of the two movable molded parts 8, 9 or larger than their central angle, which is particularly the case with pipe connections with larger outer diameters can be advantageous.
  • the pivot axes 5, 6 are advantageously above an imaginary extension 13, 14 of the parting plane 15, 16 between two adjacent molded parts 8, 10 and 9, 10, respectively, in order to improve the central alignment of the pressing forces which the molded parts 8, 9 and therefrom derived the molded part 10 when closing the pressing tongs to exercise on the parts of the pipe connection.
  • the pivot axes 5, 6 have a mirror-image orientation to the longitudinal center plane 12 of the pressing tongs, and they are defined by a hinge pin 17 or 18, which, as is illustrated for the hinge pin 17 in FIG. 7, the associated press jaws 1 and 2 and passes through both connecting plates 3, 4 and is secured by retaining screws 19, 20.
  • the two pressing jaws 1, 2 are prestressed in the closing direction by a spring 21, for example a spiral compression spring, which is supported between them and is fixed below the stationary molded part 10, so that after the pressing tongs have been placed on the parts of the pipe connection to be pressed, the pressing tongs on these parts Self-hold can be obtained and released in order to be able to connect a tong drive device (not shown) by means of an aligned bores 22, 23 in the cross bolt that extends through the connecting plates 3, 4.
  • a tong drive device can have a hydraulic or pneumatic or other suitable drive for fork parts, which the reach behind the free ends of the press jaws 1, 2 and swivel in the opposite direction outwards.
  • a guide plate 26, 27 is provided for parts of the pipe connection, which is indicated in FIG. 4 in dashed or dash-dotted lines and a support sleeve 28 with centering groove 28 'in a centering area, a compression sleeve 29 and comprises a tube 30 which can be made of plastic, a metallic material or preferably also of composite materials such as aluminum and cross-linked polyethylene.
  • Both guide parts 26, 27 have the shape of a fork-shaped plate and, between their fork legs, a shaped recess 31, 32, each adapted to a part of the pipe connection.
  • the shaped recesses 31, 32 of both guide parts 26, 27 can be identical to one another, so that the pressing tongs can be brought into engagement with the parts of the press connection independently of the side. In the case of the press connection shown in FIG. 4, this presupposes that the diameter of the bottom of the groove 28 and the outer diameter of the tube 30 are identical to one another.
  • the shaped recesses 31, 32 can, however, also be designed differently in such a way that the shaped recess 32 is adapted to the groove 28 'of the support sleeve 28 and the shaped recess 31 to the circumference of the tube 30 if these have different dimensions.
  • the guide parts 26, 27 are preferably fixed by means of retaining screws 35, 36 (FIG. 6), so that they can be detached and exchanged for spare parts or guide parts with other shaped recesses.
  • the interchangeability is also given for the molded parts 8,9,10, which are also releasably fixed by screws.
  • the screws 35, 36 fix the fixed molded part 10, and the molded parts 8, 9 are fixed by screws on the press jaws 1, 2, of which that is illustrated for the molded part 8 and is designated by 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Processing Of Terminals (AREA)
  • Compressor (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Supports For Pipes And Cables (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

The application relates to a crimping tool for crimping tube connections, in particular for tubes made of composite materials, having two crimping jaws (1, 2), each of which carries a forming part (8, 9) of a forming insert (7) and which are connected to one another by connecting plates (3, 4) arranged on both sides, are supported on the connecting plates (3, 4) in a manner which allows them to be pivoted in opposite directions about parallel pivoting axes (5, 6) and can be moved into the closed position by means of a tool driving device, which can be connected to the crimping tool by means of a transverse pin passing through aligned holes (22, 23) in the connecting plates (3, 4). In order, in particular, to achieve high forming accuracy at the crimped tube connection, the forming insert (7) is of three-part design and the third forming part (10) is supported in a fixed manner between the connecting plates (3, 4) of the crimping tool. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Preßzange für das Verpressen von Rohrverbindungen, insbesondere für Rohre aus Verbundmaterialien, in einer Ausbildung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a pressing tongs for pressing pipe connections, in particular for pipes made of composite materials, in an embodiment according to the preamble of claim 1.

Bekannte Preßzangen dieser Art (DE 27 25 280 A1) haben einen zweiteiligen Formeinsatz, bei dem sich die Teile des Formeinsatzes über einen Zentriwinkel von 180° erstrecken. Die Trennfuge zwischen beiden Formteilen fällt dabei mit der Längsmittelebene der Preßzange zusammen, zu der die beiden Schwenkachsen für die Preßbacken spiegelbildlich angeordnet sind.Known pressing tongs of this type (DE 27 25 280 A1) have a two-part mold insert, in which the parts of the mold insert extend over a central angle of 180 °. The parting line between the two molded parts coincides with the longitudinal center plane of the pressing tongs, to which the two pivot axes for the pressing jaws are arranged in mirror image.

Der Erfindung liegt die Aufgabe zugrunde, eine Preßzange der eingangs genannten Art zu schaffen, bei der die Formteile auf die zu verpressenden Teile der Rohrverbindung gleichförmiger einwirken und verpreßte Rohrverbindungen besonders hoher Formgenauigkeit erbringen. Die Erfindung löst diese Aufgabe durch eine Preßzange mit den Merkmalen des Anspruchs 1. Hinsichtlich wesentlicher weiterer Ausgestaltungen wird auf die Ansprüche 2 bis 11 verwiesen.The invention has for its object to provide a pressing tongs of the type mentioned, in which the molded parts act more uniformly on the parts of the pipe connection to be pressed and provide pressed pipe connections with particularly high dimensional accuracy. The invention solves this problem by a pressing tongs with the features of claim 1. With regard to further essential configurations, reference is made to claims 2 to 11.

Die Preßzange nach der Erfindung erzeugt verpreßte Rohrverbindungen, die insbesondere bei kreisförmiger Grundform besonders formgenau sind. Dabei werden die zum Verpressen aufgewendeten Kräfte durch die Formteile besser über den Umfang verteilt in die Teile der Rohrverbindung eingetragen mit der Folge, daß unter Vermeidung von Materialverquetschungen und damit einhergehenden Beschädigungen des Materialgefüges eine saubere Umformung mit weitgehend radialer Ausrichtung der einwirkenden Kräfte erfolgt.The pressing tongs according to the invention produce pressed pipe connections, in particular with a circular basic shape are particularly accurate. The forces used for pressing through the molded parts are better distributed over the circumference into the parts of the pipe connection, with the result that, while avoiding crushing of the material and the associated damage to the material structure, clean shaping takes place with a largely radial orientation of the acting forces.

Weitere Einzelheiten und Vorteile ergeben sich aus der nachfolgenden Beschreibung und der Zeichnung, in der ein Ausführungsbeispiel des Gegenstands der Erfindung näher veranschaulicht ist. In der Zeichnung zeigen:

Fig. 1
eine Seitenansicht der Preßzange mit ihren Preßbacken in Offenstellung,
Fig. 2
eine Darstellung der Preßzange mit ihren Preßbacken in Schließstellung,
Fig. 3
eine Ansicht ähnlich Fig. 2 in teilweise vereinfachter, teilweise geschnittener Ausführung,
Fig. 4
einen abgebrochenen Querschnitt durch die Preßzange nach der Linie IV-IV in Fig. 3,
Fig. 5
eine Stirnansicht der Preßzange nach Fig. 2,
Fig. 6
einen Querschnitt durch die Preßzange nach der Linie VI-VI in Fig. 2, und
Fig. 7
einen abgebrochenen Teilschnitt durch die Preßzange nach der Linie VII-VII in Fig. 1.
Further details and advantages result from the following description and the drawing, in which an embodiment of the object of the invention is illustrated in more detail. The drawing shows:
Fig. 1
a side view of the pressing tongs with their pressing jaws in the open position,
Fig. 2
a representation of the pressing tongs with their pressing jaws in the closed position,
Fig. 3
2 in a partially simplified, partially sectioned embodiment,
Fig. 4
a broken cross section through the pressing tongs along the line IV-IV in Fig. 3,
Fig. 5
3 shows an end view of the pressing tongs according to FIG. 2,
Fig. 6
a cross section through the pressing tongs along the line VI-VI in Fig. 2, and
Fig. 7
a broken partial section through the pressing tongs along the line VII-VII in Fig. 1st

Die in der Zeichnung veranschaulichte Preßzange für das Verpressen von Rohrverbindungen, insbesondere für Rohre aus Verbundmaterialien, umfaßt zwei Preßbacken 1,2, die untereinander durch zu beiden Seiten angeordnete Verbindungsplatten 3,4 verbunden und um parallele Schwenkachsen 5,6 gegenläufig schwenkbar an den Verbindungsplatten 3,4 abgestützt sind. Die Preßzange umfaßt ferner einen Formeinsatz 7, der von drei Formteilen 8,9,10 gebildet ist, die in Schließstellung gemeinsam eine Formöffnung 11 umgrenzen. Je ein Formteil 8,9 ist einem Preßbacken 1,2 zugeordnet, und das dritte Formteil 10 ist zwischen den Verbindungsplatten 3,4 der Preßzange ortsfest abgestützt.The pressing tongs illustrated in the drawing for the pressing of pipe connections, in particular for pipes made of composite materials, comprise two pressing jaws 1, 2, which are connected to one another by connecting plates 3, 4 arranged on both sides and can be pivoted in opposite directions about the parallel pivoting axes 5, 6 on the connecting plates 3 , 4 are supported. The pressing tongs also include a mold insert 7, which is formed by three molded parts 8, 9, 10, which together define a molded opening 11 in the closed position. One molded part 8, 9 is assigned to a pressing jaw 1, 2, and the third molded part 10 is supported in a stationary manner between the connecting plates 3, 4 of the pressing tongs.

Das ortsfest abgestützte dritte Formteil (10) hat eine zur Längsmittelebene 12 der Preßzange symmetrische Anordnung und besitzt einen Zentriwinkel, der entweder gleich ist dem Zentriwinkel der beiden beweglichen Formteile 8,9, oder größer ist als deren Zentriwinkel, was insbesondere bei Rohrverbindungen mit größeren Außendurchmessern vorteilhaft sein kann.The fixedly supported third molded part (10) has a symmetrical arrangement with respect to the longitudinal center plane 12 of the pressing tongs and has a central angle that is either the same as the central angle of the two movable molded parts 8, 9 or larger than their central angle, which is particularly the case with pipe connections with larger outer diameters can be advantageous.

Die Schwenkachsen 5,6 liegen vorteilhaft oberhalb einer gedachten Verlängerung 13,14 der Trennebene 15,16 zwischen jeweils zwei benachbarten Formteilen 8,10 bzw. 9,10, um die zentrische Ausrichtung der Preßkräfte zu verbessern, welche die Formteile 8,9 und davon abgeleitet das Formteil 10 beim Schließen der Preßzange auf die Teile der Rohrverbindung ausüben. Dabei haben die Schwenkachsen 5,6 eine spiegelbildliche Ausrichtung zur Längsmittelebene 12 der Preßzange, und sie werden definiert durch einen Gelenkbolzen 17 bzw. 18, der, wie das für den Gelenkbolzen 17 in Fig. 7 veranschaulicht ist, den zugehörigen Preßbacken 1 bzw. 2 und beide Verbindungsplatten 3,4 durchgreift und durch Halteschrauben 19,20 gesichert ist.The pivot axes 5, 6 are advantageously above an imaginary extension 13, 14 of the parting plane 15, 16 between two adjacent molded parts 8, 10 and 9, 10, respectively, in order to improve the central alignment of the pressing forces which the molded parts 8, 9 and therefrom derived the molded part 10 when closing the pressing tongs to exercise on the parts of the pipe connection. The pivot axes 5, 6 have a mirror-image orientation to the longitudinal center plane 12 of the pressing tongs, and they are defined by a hinge pin 17 or 18, which, as is illustrated for the hinge pin 17 in FIG. 7, the associated press jaws 1 and 2 and passes through both connecting plates 3, 4 and is secured by retaining screws 19, 20.

Die beiden Preßbacken 1,2 sind durch eine zwischen diesen wirksame, unterhalb des ortsfesten Formteils 10 abgestützte Feder 21, z.B. eine Spiraldruckfeder, in Schließrichtung vorgespannt, so daß nach dem Aufsetzen der Preßzange auf die zu verpressenden Teile der Rohrverbindung die Preßzange auf diesen Teilen einen Selbsthalt erlangt und losgelassen werden kann, um eine Zangenantriebsvorrichtung (nicht dargestellt) mittels eines fluchtende Bohrungen 22,23 in den Verbindungsplatten 3,4 durchgreifenden Querbolzens anschließen zu können. Eine solche Zangenantriebsvorrichtung kann einen hydraulischen oder pneumatischen oder sonst geeigneten Antrieb für Gabelteile aufweisen, welche die freien Enden der Preßbacken 1,2 innenseitig hintergreifen und gegenläufig auswärts verschwenken.The two pressing jaws 1, 2 are prestressed in the closing direction by a spring 21, for example a spiral compression spring, which is supported between them and is fixed below the stationary molded part 10, so that after the pressing tongs have been placed on the parts of the pipe connection to be pressed, the pressing tongs on these parts Self-hold can be obtained and released in order to be able to connect a tong drive device (not shown) by means of an aligned bores 22, 23 in the cross bolt that extends through the connecting plates 3, 4. Such a tong drive device can have a hydraulic or pneumatic or other suitable drive for fork parts, which the reach behind the free ends of the press jaws 1, 2 and swivel in the opposite direction outwards.

Auf beiden Außenseiten der Verbindungsplatten 3,4 ist je eine Führungsplatte 26,27 für Teile der Rohrverbindung vorgesehen, die in Fig. 4 in gestrichelten bzw. strichpunktierten Linien angedeutet ist und eine Stützhülse 28 mit Zentriernut 28' in einem Zentrierbereich, eine Preßhülse 29 und ein Rohr 30 umfaßt, das aus Kunststoff, aus metallischem Werkstoff oder bevorzugt auch aus Verbundmaterialien wie Aluminium und vernetztem Polyäthylen, bestehen kann.On both outer sides of the connecting plates 3, 4, a guide plate 26, 27 is provided for parts of the pipe connection, which is indicated in FIG. 4 in dashed or dash-dotted lines and a support sleeve 28 with centering groove 28 'in a centering area, a compression sleeve 29 and comprises a tube 30 which can be made of plastic, a metallic material or preferably also of composite materials such as aluminum and cross-linked polyethylene.

Beide Führungsteile 26,27 haben die Gestalt einer gabelförmigen Platte und zwischen ihren Gabelschenkeln eine jeweils an ein Teil der Rohrverbindung angepaßte Formausnehmung 31,32. Die Formausnehmungen 31,32 beider Führungsteile 26,27 können untereinander gleich sein, so daß die Preßzange seitenunabhängig in Eingriff mit den Teilen der Preßverbindung gebracht werden kann. Dies setzt bei der in Fig. 4 dargestellten Preßverbindung voraus, daß der Durchmesser des Bodens der Nut 28 und der Außendurchmesser des Rohrs 30 untereinander gleich sind.Both guide parts 26, 27 have the shape of a fork-shaped plate and, between their fork legs, a shaped recess 31, 32, each adapted to a part of the pipe connection. The shaped recesses 31, 32 of both guide parts 26, 27 can be identical to one another, so that the pressing tongs can be brought into engagement with the parts of the press connection independently of the side. In the case of the press connection shown in FIG. 4, this presupposes that the diameter of the bottom of the groove 28 and the outer diameter of the tube 30 are identical to one another.

Die Formausnehmungen 31,32 können jedoch auch ungleich derart ausgebildet sein, daß die Formausnehmung 32 an die Nut 28' der Stützhülse 28 und die Formausnehmung 31 an den Umfang des Rohrs 30 angepaßt ist, wenn diese unterschiedliche Abmessungen aufweisen.The shaped recesses 31, 32 can, however, also be designed differently in such a way that the shaped recess 32 is adapted to the groove 28 'of the support sleeve 28 and the shaped recess 31 to the circumference of the tube 30 if these have different dimensions.

Die Führungsteile 26,27 sind bevorzugt über Halteschrauben 35,36 (Fig. 6) festgelegt, so daß sie lösbar und gegen Ersatzteile bzw. Führungsteile mit anderen Formausnehmungen austauschbar sind. Die Austauschbarkeit ist auch für die Formteile 8,9,10 gegeben, die ebenfalls durch Schrauben lösbar festgelegt sind. Die Schrauben 35,36 legen dabei das ortsfeste Formteil 10 fest, und die Formteile 8,9 sind über Schrauben an den Preßbacken 1,2 festgelegt, von denen die für das Formteil 8 veranschaulicht und mit 38 bezeichnet ist.The guide parts 26, 27 are preferably fixed by means of retaining screws 35, 36 (FIG. 6), so that they can be detached and exchanged for spare parts or guide parts with other shaped recesses. The interchangeability is also given for the molded parts 8,9,10, which are also releasably fixed by screws. The screws 35, 36 fix the fixed molded part 10, and the molded parts 8, 9 are fixed by screws on the press jaws 1, 2, of which that is illustrated for the molded part 8 and is designated by 38.

Bei geöffneter Preßzange (Fig. 1) werden die Teile 28,29,30 der Formverbindung in die Preßzange eingelegt, wobei die Führungsteile 26,27 eine exakte Festlegung der Teile in der Preßzange in axialer Richtung herbeiführen. Dies hat zur Folge, daß die Formrippen an den Formteilen 8,9,10 exakt zu jenen Formeinsenkungen passen, die in der Stützhülse 28 vorgesehen sind. Dies sichert eine besonders präzise Verpressung, die eine dichte Verbindung der Teile gewährleistet und Gefügebeschädigungen vermeidet, die auftreten können, wenn die zu verpressenden Bereiche der Rohrverbindung in axialer Richtung Fluchtungsfehler zu den Formteilen des Formeinsatzes 7 haben.When the pressing tongs are open (FIG. 1), the parts 28, 29, 30 of the molded connection are inserted into the pressing tongs, the guide parts 26, 27 bringing about an exact fixing of the parts in the pressing tongs in the axial direction. The result of this is that the shaped ribs on the shaped parts 8, 9, 10 fit exactly into the depressions provided in the support sleeve 28. This ensures a particularly precise pressing, which ensures a tight connection of the parts and avoids structural damage that can occur if the areas of the pipe connection to be pressed have misalignments in the axial direction with the molded parts of the mold insert 7.

Claims (11)

Preßzange für das Verpressen von Rohrverbindungen, insbesondere für Rohre aus Verbundmaterialien, mit zwei je ein Formteil (8,9) eines Formeinsatzes (7) tragenden Preßbacken (1,2), die untereinander durch zu beiden Seiten angeordnete Verbindungsplatten (3,4) verbunden, um parallele Schwenkachsen (5,6) gegenläufig schwenkbar an den Verbindungsplatten (3,4) abgestützt und mittels einer Zangenantriebsvorrichtung in Schließstellung bewegbar sind, die mittels eines fluchtende Bohrungen (22,23) in den Verbindungsplatten (3,4) durchgreifenden Querbolzens an die Preßzange anschließbar ist, dadurch gekennzeichnet, daß der Formeinsatz (7) dreiteilig ausgebildet und das dritte Formteil (10) zwischen den Verbindungsplatten (3,4) der Preßzange ortsfest abgestützt ist.Crimping pliers for pressing pipe connections, in particular for pipes made of composite materials, with two pressing jaws (1, 2) each carrying a molded part (8,9) of a mold insert (7), which are connected to one another by connecting plates (3, 4) arranged on both sides , about parallel pivot axes (5,6) in opposite directions, are supported on the connecting plates (3,4) and can be moved into the closed position by means of a tong drive device, which cross bolts pass through an aligned bore (22,23) in the connecting plates (3,4) the pressing tongs can be connected, characterized in that the mold insert (7) is constructed in three parts and the third shaped part (10) is supported in a stationary manner between the connecting plates (3, 4) of the pressing tongs. Preßzange nach Anspruch 1, dadurch gekennzeichnet, daß die Formteile (8,9,10) des Formeinsatzes (7) untereinander gleiche Zentriwinkel aufweisen.Pressing tongs according to claim 1, characterized in that the molded parts (8,9,10) of the molded insert (7) have the same central angle with each other. Preßzange nach Anspruch 1, dadurch gekennzeichnet, daß die den Preßbacken (1,2) zugeordneten Formteile (8,9) einen untereinander gleichen Zentriwinkel aufweisen, der kleiner ist als der Zentriwinkel des ortsfest abgestützten Formteils (10).Pressing tongs according to claim 1, characterized in that the molded parts (8,9) assigned to the pressing jaws (1,2) have a central angle which is equal to one another and which is smaller than the central angle of the fixedly supported molded part (10). Preßzange nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schwenkachsen (5,6) für die Preßbacken (1,2) oberhalb einer gedachten Verlängerung (13,14) der Trennebene zwischen jeweils zwei benachbarten Formteilen (8,10;9,10) gelegen sind.Press pliers according to one of claims 1 to 3, characterized in that the pivot axes (5, 6) for the press jaws (1, 2) above an imaginary extension (13, 14) of the parting plane between each two adjacent molded parts (8, 10; 9 , 10) are located. Preßzange nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Preßbacken (1,2) durch eine zwischen diesen unterhalb des ortsfesten Formteils (10) abgestützte Feder (21) in Schließrichtung vorgespannt sind.Pressing tongs according to one of claims 1 to 4, characterized in that the pressing jaws (1, 2) are pretensioned in the closing direction by a spring (21) supported between them below the stationary molded part (10). Preßzange nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß auf beiden Außenseiten der Verbindungsplatten (3,4) eine Führungsplatte (26,27) für Teile der Rohrverbindung vorgesehen sind.Crimping pliers according to one of claims 1 to 5, characterized in that a guide plate (26, 27) for parts of the pipe connection is provided on both outer sides of the connecting plates (3, 4). Preßzange nach Anspruch 6, dadurch gekennzeichnet, daß beide Führungsteile (26,27) die Gestalt einer gabelförmigen Platte und zwischen ihren Gabelschenkeln eine jeweils an ein Teil der Rohrverbindung angepaßte Formausnehmung (31,32) aufweisen.Crimping pliers according to claim 6, characterized in that both guide parts (26, 27) have the shape of a fork-shaped plate and between their fork legs a shaped recess (31, 32) which is adapted to a part of the pipe connection. Preßzange nach Anspruch 7, dadurch gekennzeichnet, daß die Formausnehmungen (31,32) beider Führungsteile (26,27) untereinander gleich sind.Press tongs according to claim 7, characterized in that the shaped recesses (31, 32) of both guide parts (26, 27) are identical to one another. Preßzange nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, daß das auf der einen Seite der Preßzange angeordnete Führungsteil (27) eine an einen Zentrierbereich (28') einer Stützhülse (28) der Rohrverbindung angepaßte Formausnehmung (32) aufweist.Pressing tongs according to one of claims 6 or 7, characterized in that the guide part (27) arranged on one side of the pressing tongs has a shaped recess (32) adapted to a centering area (28 ') of a support sleeve (28) of the pipe connection. Preßzange nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, daß das auf der anderen Seite der Preßzange angeordnete Führungsteil (26) eine an den Umfang des mit der Stützhülse zu verbindenden Rohrs (30) angepaßte Formausnehmung (31) aufweist und mit seinem die Formausnehmung (31) zumindest unterseitig begrenzenden Randbereich einen Anschlag für die Stirnfläche an einem Ende der Stützhülse (28) bildet.Pressing tongs according to one of claims 6 or 7, characterized in that the guide part (26) arranged on the other side of the pressing tongs has a shaped recess (31) adapted to the circumference of the tube (30) to be connected to the support sleeve and with it the shaped recess (31) forms an abutment for the end face at one end of the support sleeve (28) at least on the underside. Preßzange nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Teile (8,9,10) des Formeinsatzes (7) und die Führungsteile (26,27) lösbar festgelegt und gegen Ersatzteile oder Teile für andere Rohrverbindungen austauschbar sind.Crimping pliers according to one of claims 1 to 10, characterized in that the parts (8, 9, 10) of the mold insert (7) and the guide parts (26, 27) are detachably fixed and can be exchanged for spare parts or parts for other pipe connections.
EP91121960A 1991-03-18 1991-12-20 Crimping tool for crimping tube connections Expired - Lifetime EP0504490B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9103264U 1991-03-18
DE9103264U DE9103264U1 (en) 1991-03-18 1991-03-18 Pressing pliers for pressing pipe connections

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EP0504490A1 true EP0504490A1 (en) 1992-09-23
EP0504490B1 EP0504490B1 (en) 1994-09-28

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US (2) US5307664A (en)
EP (1) EP0504490B1 (en)
AT (1) ATE112192T1 (en)
CA (1) CA2062898A1 (en)
DE (2) DE9103264U1 (en)
DK (1) DK0504490T3 (en)
ES (1) ES2066327T3 (en)
PT (1) PT100249B (en)

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DE4300934A1 (en) * 1993-01-15 1994-08-18 Hewing Gmbh Press tool for pressing a cylindrical press part or a press part having a cylindrical press section onto a round profile
EP0611613A1 (en) * 1993-01-15 1994-08-24 Hewing GmbH Crimping-tool for crimping a cylindrical ferrule or a cylindrical part-containing ferrule
EP0771615A1 (en) 1995-11-03 1997-05-07 Rothenberger Werkzeuge AG Crimping device for radially crimping tube connections
DE10106363C1 (en) * 2001-02-12 2002-06-06 Rothenberger Werkzeuge Ag Pressing head for connecting pipe lines has double-armed lever tongs with pressure members mounted by oppositely acting parallelogram rod units whose articulation axes are each side
EP2386385A3 (en) * 2010-05-11 2016-03-30 ContiTech MGW GmbH Pressing tool for deforming rotationally symmetrical ring-shaped body
USD1025732S1 (en) * 2023-08-03 2024-05-07 Qing Dai Hydraulic tool

Also Published As

Publication number Publication date
DE9103264U1 (en) 1991-06-20
PT100249A (en) 1994-04-29
DK0504490T3 (en) 1994-11-28
DE59103117D1 (en) 1994-11-03
US5307664A (en) 1994-05-03
ATE112192T1 (en) 1994-10-15
EP0504490B1 (en) 1994-09-28
PT100249B (en) 1999-04-30
US5377400A (en) 1995-01-03
CA2062898A1 (en) 1992-09-19
ES2066327T3 (en) 1995-03-01

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