EP0627273A2 - Press tool - Google Patents

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Publication number
EP0627273A2
EP0627273A2 EP94110654A EP94110654A EP0627273A2 EP 0627273 A2 EP0627273 A2 EP 0627273A2 EP 94110654 A EP94110654 A EP 94110654A EP 94110654 A EP94110654 A EP 94110654A EP 0627273 A2 EP0627273 A2 EP 0627273A2
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EP
European Patent Office
Prior art keywords
press
jaws
pressing
tool according
ring
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Granted
Application number
EP94110654A
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German (de)
French (fr)
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EP0627273A3 (en
EP0627273B1 (en
Inventor
Helmut Dipl.-Ing. Dischler
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Individual
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Individual
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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
    • 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
    • B21D39/046—Connecting tubes to tube-like fittings
    • 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
    • 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
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • 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 tool for connecting tubular workpieces with more than two pressing jaws, which can be moved relative to one another with the aid of at least one drive device such that they can be brought into a pressing position from an open position, in which the pressing device can be placed on the workpiece, in which the press jaws complement each other to form a closed press room.
  • Coupling sleeves are used to connect pipe ends, which are plastically deformable and made of metal, preferably steel. Their inner diameter is so much larger than the outer diameter of the pipe ends to be connected that they are permanently deformed in the event of radial compression until they rest against the outer surface of the pipe ends. According to DE-PS 11 87 870 ⁇ such coupling sleeves can also have an annular groove on the inside near each end, into which an elastic sealing ring is inserted.
  • the radial compression takes place by means of pressing tools, as are known for example from DE-PS 21 36 782.
  • This pressing tool has two clamping arms, each with two arms, at least one of which is pivotably mounted on the pressing tool.
  • the press jaws have press surfaces which form circular arc sections and have the same radii, which enclose a press space. Instead of being circular arc sections, the pressing surfaces can also be contoured, for example to form a polygonal or oval pressing space.
  • the arms of the press jaws located distant from the press chamber can be spread against the action of a spring, with the result that the press jaws are moved against one another in the region of the press chamber.
  • the spreading takes place by means of pressure rollers which are arranged next to one another and abut one another and which are moved together between the arms by means of a drive device in the form of a working cylinder and in this way pivot the press jaws.
  • this pressing tool is the pressing tool according to the preamble of claim 1 and is described in DE-OS 34 23 283.
  • two press jaws are provided which are each pivotably mounted on a drive lever, which in turn are pivotably guided on the press tool.
  • the drive levers have opposite arms which can be spread by means of pressure rollers which can be moved into the intermediate space by a working cylinder and in this way move the pressing jaws towards one another.
  • the press jaws are additionally guided in scenes such that when the drive levers are pivoted in the opening direction they are pivoted open about their articulation points on the drive levers, so that between the end faces of the press jaws there is a wide, mouth-like opening which accommodates the pipe ends to be connected or a coupling sleeve facilitated.
  • the clamping jaws When pivoting the drive lever in the opposite direction, the clamping jaws are pivoted again so that the perpendicular to their arc sections approximately collapse and the jaws are moved parallel to each other when the drive lever is pivoted further. During the pressing process, the clamping jaws are moved further towards one another until they enclose a circular surface at the end of the press and have deformed the pipe ends or the coupling sleeve accordingly with a reduction in diameter.
  • This press tool has proven itself when a not too large diameter reduction or insertion depth is required. For larger press-in depths, which are required if the pipe connection is to withstand higher internal pressures, it is necessary to provide more than two press jaws so that there is no formation of outwardly projecting webs between the end faces of the press jaws, which leads to a complete closing of the press jaws would prevent.
  • Such pressing tools are described for example in DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 and DE-AS 19 0 ⁇ 7 956. All pressing tools disclosed therein have in common that all pressing jaws are movable and guided in the radial direction. This requires complex guides and drive devices, which makes the pressing tools difficult and therefore difficult to handle and also expensive.
  • the invention is therefore based on the object of designing a press tool of the type mentioned in such a way that, despite the arrangement of more than two press jaws, it is as simple as possible and thus easy to handle and can be produced inexpensively.
  • press jaws are articulated together to form a press ring, the press ring between two press jaws being open and being closable by means of the drive device (s) by pulling the press ring together.
  • This embodiment opens up the possibility that the drive device (s) is or are separate from the press ring and that the drive device (s) and the press ring have coupling elements via which they can be brought into operative connection with one another.
  • the press tool is then formed in two parts, the press ring first being placed around the workpiece and then the drive device being attached to the press ring.
  • the pressing tool is very advantageous in its handling because the individual parts have a significantly lower weight and can be handled independently of one another.
  • the press ring can have at least one tension band lying on the outside against at least the movable press jaws, by means of which the pressure jaws can be moved together, wherein two tension bands can also be provided for this.
  • This version is particularly weight and cost-saving.
  • the press jaws are of equal length in the circumferential direction, so that the gaps between the respective opposite end faces of the press jaws are uniformly distributed over the circumference.
  • FIGS. 1 and 2 show two pressing tools 91, 92, half each.
  • the pressing tool 91 is shown on the left half of FIGS. 1 and 2 with respect to the axis of symmetry, and the pressing tool 92 is shown on the right half.
  • Both pressing tools 91, 92 are mirror-symmetrical, so that their structure results from the representation of their halves.
  • the pressing tool 91 shown in the left halves of FIGS. 1 and 2 has a pressing ring 93 which consists of a total of three pressing jaws 94, 95, the pressing jaw 94 only partially and a pressing jaw - namely the right one - not at all due to the half-sided representation are seen.
  • a flexible tension band 97 made of spring steel is fastened to the upper press jaw 94 by means of a screw 96 and extends over the circumference of the upper press jaw 94 and the left press jaw 95.
  • a corresponding tension band runs to the other side of the press ring 93, not shown here.
  • the lower press jaws 95 are guided in the circumferential direction K on the tension bands 97.
  • a rubber spring 98 fits into recesses in the opposite end faces of the press jaws 94, 95 and is vulcanized onto them.
  • the press jaws 94, 95 are pressed apart by the rubber springs 98 to a certain extent, so that there are gaps 99, 10 ⁇ 0 ⁇ of the same width between the opposite end faces of the press jaws 94, 95 when the press jaws 94, 95 on the outside on a coupling sleeve 10 ⁇ 1 issue.
  • coupling attachments 10-2 are attached on the outside.
  • a drive device 10 ⁇ 3 shown here only schematically and in dash-dot lines, which is separate from the press ring 93, can be attached to these coupling attachments 10-2.
  • the pressing tool 91 thus consists of two independent parts that can be coupled together.
  • the drive device 10 ⁇ 3 has two drive levers 10 ⁇ 4, of which only the left one can be seen here. They are rotatably mounted about pivot pins 10 ⁇ 5 extending perpendicular to the plane of the drawing. Your downward-pointing arms 10 ⁇ 6 are spread for pivoting in the direction of arrow L, against the action of a spring, not shown here, which contracts the lower arms 10 ⁇ 6. A pair of pressure rollers is used to spread the arms 10 ⁇ 6, which can be moved into the space between the arms 10 ⁇ 6 with the aid of a pneumatically or hydraulically actuated working cylinder.
  • Such a drive device is known per se from DE-PS 21 36 782 and DE-OS 34 23 382.
  • the arms 10 ⁇ 7 extending upwards from the pivot bolts 10 ⁇ 5 are shaped in such a way that they can reach behind the coupling projections 10 ⁇ 2.
  • the pressing ring 93 When the pressing tool 91 is used, the pressing ring 93 is first opened, so that the lower pressing jaws 95 protrude outwards, as is shown in broken lines. The press ring 93 can then be pushed across the combination of coupling sleeve 10 ⁇ 1 and pipe end 10 ⁇ 8 across its longitudinal axis. Due to the spring action of the drawstrings 97, the press jaws 94, 95 put on the circumference of the coupling sleeve 10-1, and here too only with the outer transverse edges. Then the drive device 10 ⁇ 3 is set in such a way that the upper arms 10 Antriebs7 of the drive lever 10 ⁇ 4 grip the coupling projections 10 ⁇ 2 on the outside, as can be seen from FIG.
  • the press tool 92 is functionally similar to the press tool 91. It also has a press ring 10 ⁇ 9, which has three press jaws 110 ⁇ , 111 of the same arc length.
  • the upper press jaw 110 ⁇ is firmly arranged on a press jaw support 112, while the two lower press jaws 111 are guided on the press jaw supports 113 so as to be displaceable in the circumferential direction.
  • the lower press jaw carriers 113 are articulated to the upper press jaw carrier 112 via swivel joints 114.
  • the lower pressing jaws 111 have notches 115 on their outer circumferences, into which pins 116 which are axially displaceably mounted engage in the lower pressing jaw carriers 113. These pins 116 are spring-loaded via compression springs 117 in the direction of the notches 115.
  • the pins 116 and the notches 115 are arranged in such a way that the pins 116 endeavor to move the lower pressing jaws 111 against each other in the circumferential direction, that is to say the right lower pressing jaw 111 shown clockwise and the pressing jaw, not shown here, counterclockwise. Stops, not shown here, ensure that the lower press jaws 113 cannot be moved further in these two directions beyond a certain maximum dimension.
  • the press tool 92 is handled in the same way as the press tool 91.
  • the lower press jaw carriers 113 are brought into contact with the outer circumference of the coupling sleeve 10-1.
  • the abovementioned stops for limiting the movement of the lower pressing jaws 111 in the circumferential direction are arranged such that gaps 119, 120 ⁇ between the end faces of the pressing jaws 110 ⁇ , 111 result when the clutch sleeve 10-1 is in contact.
  • the pressing tools 91, 92 can also be formed in one piece, i. H. the drive device 10 ⁇ 3 can be connected to one of the press jaws 94, 95 110 ⁇ , 111 via a corresponding housing part.
  • the respective press jaw 94, 95, 110 ⁇ , 111 would be comparable to an abutment, the press jaws 94, 95, 110 ⁇ , 111 moving during the pressing process in the direction of the center of the press chamber in the closed state of the press tool 91, 92.
  • One of the lower press jaws 95, 111 can also be the press jaw 95, 111 which is arranged in a fixed position on the press tool 91, 92 and performs the function of the abutment. In this case, only one drive lever 10 ⁇ 4 is required to pull the press jaws 94, 95, 110 ⁇ , 111 together.

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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Press Drives And Press Lines (AREA)
  • Automatic Assembly (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Paper (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Earth Drilling (AREA)
  • Adornments (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

Ein Preßwerkzeug (91, 92) zum Verbinden von rohrförmigen Werkstücken (10̸1, 10̸8) weist mehr als zwei Preßbacken (94, 95, 110̸, 11) auf, die mit Hilfe wenigstens einer Antriebseinrichtung (10̸3) derart relativ zueinander bewegbar sind, daß sie aus einer Offenstellung, in der das Preßwerkzeug auf das Werkstück (10̸1, 10̸8) aufsetzbar ist, in eine Preßstellung bringbar sind, in der sich die Preßbacken (94, 95, 110̸, 111) zu einem geschlossenen Preßraum ergänzen. Erfindungsgemäß sind die Preßbacken (94, 95, 110̸, 111) unter Bildung eines Preßrings (93, 10̸9) gelenkartig miteinander verbunden, wobei der Preßring (93, 10̸9) zwischen zwei Preßbacken (95, 111) offen ist und mittels der bzw. den Antriebseinrichtung(en) (10̸3) unter Zusammenziehen des Preßrings (93, 10̸9) schließbar ist.

Figure imgaf001
A press tool (91, 92) for connecting tubular workpieces (10̸1, 10̸8) has more than two press jaws (94, 95, 110̸, 11) which can be moved relative to one another with the aid of at least one drive device (10̸3) such that they from an open position, in which the pressing tool can be placed on the workpiece (10̸1, 10̸8), can be brought into a pressing position in which the pressing jaws (94, 95, 110̸, 111) complement each other to form a closed pressing space. According to the invention, the press jaws (94, 95, 110̸, 111) are articulated to form a press ring (93, 10̸9), the press ring (93, 10̸9) between two press jaws (95, 111) being open and by means of the or the Drive device (s) (10̸3) can be closed by pulling together the press ring (93, 10̸9).
Figure imgaf001

Description

Die Erfindung betrifft ein Preßwerkzeug zum Verbinden von rohrförmigen Werkstücken mit mehr als zwei Preßbacken, die mit Hilfe wenigstens einer Antriebseinrichtung derart relativ zueinander bewegbar sind, daß sie aus einer Offenstellung, in der das Preßgerät auf das Werkstück aufsetzbar ist, in eine Preßstellung bringbar sind, in der sich die Preßbacken zu einem geschlossenen Preßraum ergänzen.The invention relates to a pressing tool for connecting tubular workpieces with more than two pressing jaws, which can be moved relative to one another with the aid of at least one drive device such that they can be brought into a pressing position from an open position, in which the pressing device can be placed on the workpiece, in which the press jaws complement each other to form a closed press room.

Zur Verbindung von Rohrenden werden Kupplungshülsen verwendet, die plastisch verformbar sind und aus Metall, vorzugsweise aus Stahl bestehen. Ihr Innendurchmesser ist um so viel größer als der Außendurchmesser der zu verbindenden Rohrenden, daß sie bei radialer Zusammenpressung bis zum Anliegen an der Mantelfläche der Rohrenden bleibend verformt werden. Nach der DE-PS 11 87 870̸ können solche Kupplungshülsen an ihrer Innenseite in der Nähe jedes Endes zusätzlich eine Ringnut aufweisen, in die ein elastischer Dichtungsring eingelegt ist.Coupling sleeves are used to connect pipe ends, which are plastically deformable and made of metal, preferably steel. Their inner diameter is so much larger than the outer diameter of the pipe ends to be connected that they are permanently deformed in the event of radial compression until they rest against the outer surface of the pipe ends. According to DE-PS 11 87 870̸ such coupling sleeves can also have an annular groove on the inside near each end, into which an elastic sealing ring is inserted.

Das radiale Zusammenpressen geschieht mittels Preßwerkzeugen, wie sie beispielsweise aus der DE-PS 21 36 782 bekannt sind. Dieses Preßwerkzeug weist zwei jeweils zweiarmig ausgebildete Klemmbacken auf, von denen wenigstens einer schwenkbar an dem Preßwerkzeug gelagert ist. Die Preßbacken weisen Kreisbogenabschnitte bildende Preßflächen mit gleichen Radien auf, die einen Preßraum einschließen. Statt als Kreisbogenabschnitte können die Preßflächen auch konturiert sein, um beispielsweise einen mehreckigen oder ovalen Preßraum zu bilden.The radial compression takes place by means of pressing tools, as are known for example from DE-PS 21 36 782. This pressing tool has two clamping arms, each with two arms, at least one of which is pivotably mounted on the pressing tool. The press jaws have press surfaces which form circular arc sections and have the same radii, which enclose a press space. Instead of being circular arc sections, the pressing surfaces can also be contoured, for example to form a polygonal or oval pressing space.

Die dem Preßraum entfernt liegenden Arme der Preßbacken können gegen die Wirkung einer Feder gespreizt werden mit der Folge, daß die Preßbacken im Bereich des Preßraums gegeneinander bewegt werden. Das Spreizen geschieht mittels nebeneinander angeordneter und aneinander anliegender Druckrollen, die gemeinsam mittels einer Antriebeseinrichtung in Form eines Arbeitszylinders zwischen die Arme gefahren werden und auf diese Weise die Preßbacken verschwenken.The arms of the press jaws located distant from the press chamber can be spread against the action of a spring, with the result that the press jaws are moved against one another in the region of the press chamber. The spreading takes place by means of pressure rollers which are arranged next to one another and abut one another and which are moved together between the arms by means of a drive device in the form of a working cylinder and in this way pivot the press jaws.

Eine Weiterentwicklung dieses Preßwerkzeuges stellt das Preßwerkzeug gemäß dem Oberbegriff des Anspruchs 1 dar und ist in der DE-OS 34 23 283 beschrieben. Bei diesem Preßwerkzeug sind zwei Preßbacken vorgesehen, die jeweils an einem Antriebshebel schwenkbar gelagert sind, welche wiederum schwenkbar an dem Preßwerkzeug geführt sind. Die Antriebshebel weisen gegenüberliegende Arme auf, die mittels von einem Arbeitszylinder in den Zwischenraum einfahrbaren Druckrollen gespreizt werden können und auf diese Weise die Preßbacken aufeinanderzu bewegen. Die Preßbacken sind dabei zusätzlich in Kulissen derart geführt, daß sie beim Verschwenken der Antriebshebel in öffnungsrichtung um ihre Anlenkpunkte an den Antriebshebeln aufgeschwenkt werden, so daß zwischen den Stirnseiten der Preßbacken eine weite, maulartige öffnung entsteht, die die Aufnahme der zu verbindenden Rohrenden bzw. einer Kupplungshülse erleichtert.A further development of this pressing tool is the pressing tool according to the preamble of claim 1 and is described in DE-OS 34 23 283. In this press tool, two press jaws are provided which are each pivotably mounted on a drive lever, which in turn are pivotably guided on the press tool. The drive levers have opposite arms which can be spread by means of pressure rollers which can be moved into the intermediate space by a working cylinder and in this way move the pressing jaws towards one another. The press jaws are additionally guided in scenes such that when the drive levers are pivoted in the opening direction they are pivoted open about their articulation points on the drive levers, so that between the end faces of the press jaws there is a wide, mouth-like opening which accommodates the pipe ends to be connected or a coupling sleeve facilitated.

Beim Verschwenken der Antriebshebel in umgekehrter Richtung werden die Klemmbacken wieder so verschwenkt, daß die Mittelsenkrechten auf ihre Bogenabschnitte in etwa ineinanderfallen und die Klemmbacken beim weiteren Verschwenken der Antriebshebei parallel gegeneinander verschoben werden. Während des Preßvorgangs werden die Klemmbacken weiter gegeneinander bewegt, bis sie am Preßende eine Kreisfläche einschließen und dabei die Rohrenden bzw. die Kupplungshülse entsprechend unter Durchmesserverringerung verformt haben.When pivoting the drive lever in the opposite direction, the clamping jaws are pivoted again so that the perpendicular to their arc sections approximately collapse and the jaws are moved parallel to each other when the drive lever is pivoted further. During the pressing process, the clamping jaws are moved further towards one another until they enclose a circular surface at the end of the press and have deformed the pipe ends or the coupling sleeve accordingly with a reduction in diameter.

Dieses Preßwerkzeug hat sich bewährt, wenn eine nicht zu große Durchmesserverkleinerung bzw. Einpreßtiefe gefordert wird. Bei größeren Einpreßtiefen, die dann erforderlich sind, wenn die Rohrverbindung höheren Innendrücken standhalten soll, ist es erforderlich, mehr als zwei Preßbacken vorzusehen, damit es zwischen den Stirnseiten der Preßbacken nicht zum Ausbilden von nach außen vorstehenden Stegen kommt, welche ein vollständiges Schließen der Preßbacken verhindern würden. Solche Preßwerkzeuge sind beispielsweise in der DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 und DE-AS 19 0̸7 956 beschrieben. Allen darin offenbarten Preßwerkzeugen ist gemeinsam, daß sämtliche Preßbacken beweglich und in radialer Richtung geführt sind. Dies bedingt aufwendige Führungen und Antriebseinrichtungen, wodurch die Preßwerkzeuge schwer und deshalb schlecht handhabbar und ferner auch teuer sind.This press tool has proven itself when a not too large diameter reduction or insertion depth is required. For larger press-in depths, which are required if the pipe connection is to withstand higher internal pressures, it is necessary to provide more than two press jaws so that there is no formation of outwardly projecting webs between the end faces of the press jaws, which leads to a complete closing of the press jaws would prevent. Such pressing tools are described for example in DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 and DE-AS 19 0̸7 956. All pressing tools disclosed therein have in common that all pressing jaws are movable and guided in the radial direction. This requires complex guides and drive devices, which makes the pressing tools difficult and therefore difficult to handle and also expensive.

Der Erfindung liegt demnach die Aufgabe zugrunde, ein Preßwerkzeug der eingangs genannten Art so zu gestalten, daß es trotz der Anordnung von mehr als zwei Preßbacken möglichst einfach und damit leicht handhabbar ausgebildet sowie kostengünstig herstellbar ist.The invention is therefore based on the object of designing a press tool of the type mentioned in such a way that, despite the arrangement of more than two press jaws, it is as simple as possible and thus easy to handle and can be produced inexpensively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Preßbacken unter Bildung eines Preßrings gelenkartig miteinander verbunden sind, wobei der Preßring zwischen zwei Preßbacken offen ist und mittels der bzw. den Antriebseinrichtung(en) unter Zusammenziehen des Preßrings schließbar ist.This object is achieved in that the press jaws are articulated together to form a press ring, the press ring between two press jaws being open and being closable by means of the drive device (s) by pulling the press ring together.

Diese Ausführungsform eröffnet die Möglichkeit, daß die Antriebseinrichtung(en) von dem Preßring getrennt ausgebildet ist bzw. sind und die Antriebseinrichtung(en) und der Preßring Kupplungselemente aufweisen, über die sie miteinander in Wirkverbindung bringbar sind. Das Preßwerkzeug ist dann zweiteilig ausgebildet, wobei der Preßring zunächst um das Werkstück gelegt und dann die Antriebseinrichtung an den Preßring angesetzt wird. Das Preßwerkzeug ist in seiner Handhabung sehr vorteilhaft, da die Einzelteile ein wesentlich geringeres Gewicht haben und unabhängig voneinander handhabbar sind.This embodiment opens up the possibility that the drive device (s) is or are separate from the press ring and that the drive device (s) and the press ring have coupling elements via which they can be brought into operative connection with one another. The press tool is then formed in two parts, the press ring first being placed around the workpiece and then the drive device being attached to the press ring. The pressing tool is very advantageous in its handling because the individual parts have a significantly lower weight and can be handled independently of one another.

Dabei kann der Preßring wenigstens eine außenseitig an zumindest den bewegbaren Preßbacken anliegendes Zugband aufweisen, über das bzw. die die Preßbacken zusammenbewegbar sind, wobei hierfür auch zwei Zugbänder vorgesehen sein können. Diese Ausführung ist besonders gewichts- und kostensparend.In this case, the press ring can have at least one tension band lying on the outside against at least the movable press jaws, by means of which the pressure jaws can be moved together, wherein two tension bands can also be provided for this. This version is particularly weight and cost-saving.

Damit die stirnseitigen Abstände der Preßbacken zu Beginn des Preßvorgangs exakt gleich sind, ist nach einem weiteren Merkmal der Erfindung vorgeschlagen, daß zumindest ein Teil der Preßbacken in Preßbackenträgern relativ zu diesen bewegbar geführt ist, wobei entsprechende Führungseinrichtungen vorgesehen sein können, die garantieren, daß die stirnseitigen Abstände der Preßbacken zu Beginn des Preßvorgangs gleich sind. Dabei können die Preßbacken im wesentlichen in Umfangsrichtung beweglich geführt sein. Als Führungseinrichtungen kommen Kulissenführungen, aber auch eine gegen Anschläge gerichtete Federbeaufschlagung in Frage.So that the end distances of the pressing jaws are exactly the same at the beginning of the pressing process, it is proposed according to a further feature of the invention that at least some of the pressing jaws in the pressing jaw carriers are guided so as to be movable relative to these, wherein corresponding guiding devices can be provided which guarantee that the End distances of the press jaws are the same at the beginning of the pressing process. The press jaws can be guided so that they can move substantially in the circumferential direction. Slide guides, but also spring action against stops can be used as guide devices.

Schließlich ist gemäß der Erfindung vorgesehen, daß die Preßbacken in Umfangsrichtung gleich lang ausgebildet sind, so daß die Spalte zwischen den jeweils gegenüberliegenden Stirnseiten der Preßbacken über den Umfang gleichmäßig verteilt sind.Finally, it is provided according to the invention that the press jaws are of equal length in the circumferential direction, so that the gaps between the respective opposite end faces of the press jaws are uniformly distributed over the circumference.

In der Zeichnung ist die Erfindung anhand von Ausführungsbeispielen näher veranschaulicht. Es zeigen:

Figur 1
die jeweils hälftige Darstellung von zwei Preß werkzeugen in Offenstellung;
Figur 2
die Preßwerkzeuge gemäß Figur 1 in Schließstellung.
In the drawing, the invention is illustrated in more detail using exemplary embodiments. Show it:
Figure 1
the respective half representation of two press tools in the open position;
Figure 2
the pressing tools according to Figure 1 in the closed position.

In den Figuren 1 und 2 sind zwei Preßwerkzeuge 91, 92 dargestellt, und zwar jeweils hälftig. Auf der zur Symmetrieachse linken Hälfte der Figuren 1 und 2 ist das Preßwerkzeug 91 und auf der jeweils rechten Hälfte das Preßwerkzeug 92 gezeigt. Beide Preßwerkzeuge 91, 92 sind spiegelsymmetrisch ausgebildet, so daß sich ihr Aufbau schon aus der Darstellung ihrer Hälften ergibt.1 and 2 show two pressing tools 91, 92, half each. The pressing tool 91 is shown on the left half of FIGS. 1 and 2 with respect to the axis of symmetry, and the pressing tool 92 is shown on the right half. Both pressing tools 91, 92 are mirror-symmetrical, so that their structure results from the representation of their halves.

Das in den linken Hälften der Figuren 1 und 2 dargestellte Preßwerkzeug 91 weist einen Preßring 93 auf, der aus insgesamt drei Preßbacken 94, 95 besteht, wobei wegen der halbseitigen Darstellung die Preßbacke 94 nur teilweise und eine Preßbacke - nämlich die rechte - überhaupt nicht zu sehen sind. An der oberen Preßbacke 94 ist mittels einer Schraube 96 ein aus Federstahl bestehendes, biegsames Zugband 97 befestigt, das sich über den Umfang der oberen Preßbacke 94 und der linken Preßbacke 95 erstreckt. Ein entsprechendes Zugband verläuft zur anderen, hier nicht dargestellten Seite des Preßrings 93.The pressing tool 91 shown in the left halves of FIGS. 1 and 2 has a pressing ring 93 which consists of a total of three pressing jaws 94, 95, the pressing jaw 94 only partially and a pressing jaw - namely the right one - not at all due to the half-sided representation are seen. A flexible tension band 97 made of spring steel is fastened to the upper press jaw 94 by means of a screw 96 and extends over the circumference of the upper press jaw 94 and the left press jaw 95. A corresponding tension band runs to the other side of the press ring 93, not shown here.

Die unteren Preßbacken 95 sind in Umfangsrichtung K verschieblich an den Zugbändern 97 geführt. Jeweils eine Gummifeder 98 faßt in Ausnehmungen in den gegenüberliegenden Stirnseiten der Preßbacken 94, 95 ein und ist an diesen anvulkanisiert. In unbelastetem Zustand werden die Preßbacken 94, 95 durch die Gummifedern 98 um ein bestimmtes Maß auseinandergedrückt, so daß sich zwischen den gegenüberliegenden Stirnseiten der Preßbacken 94, 95 Spalte 99, 10̸0̸ gleicher Breite ergeben, wenn die Preßbacken 94, 95 außenseitig auf einer Kupplungshülse 10̸1 anliegen.The lower press jaws 95 are guided in the circumferential direction K on the tension bands 97. In each case a rubber spring 98 fits into recesses in the opposite end faces of the press jaws 94, 95 and is vulcanized onto them. In the unloaded state, the press jaws 94, 95 are pressed apart by the rubber springs 98 to a certain extent, so that there are gaps 99, 10̸0̸ of the same width between the opposite end faces of the press jaws 94, 95 when the press jaws 94, 95 on the outside on a coupling sleeve 10̸1 issue.

An den freien Enden der Zugbänder 97 sind außenseitig Kupplungsansätze 10̸2 angebracht. An diesen Kupplungsansätzen 10̸2 kann eine hier nur schematisch und strichpunktiert dargestellte Antriebseinrichtung 10̸3 angesetzt werden, die von dem Preßring 93 getrennt ist. Das Preßwerkzeug 91 besteht also aus zwei unabhängigen Teilen, die miteinander gekuppelt werden können.At the free ends of the drawstrings 97 coupling attachments 10-2 are attached on the outside. A drive device 10̸3, shown here only schematically and in dash-dot lines, which is separate from the press ring 93, can be attached to these coupling attachments 10-2. The pressing tool 91 thus consists of two independent parts that can be coupled together.

Die Antriebseinrichtung 10̸3 weist zwei Antriebshebel 10̸4 auf, von denen hier nur der linke zu sehen ist. Sie sind um senkrecht zur Zeichnungsebene sich erstreckende Schwenkbolzen 10̸5 verdrehbar gelagert. Ihre nach unten zeigenden Arme 10̸6 werden zum Verschwenken in Richtung des Pfeils L gespreizt, und zwar gegen die Wirkung einer hier nicht näher dargestellten, die unteren Arme 10̸6 zusammenziehenden Feder. Zum Spreizen der Arme 10̸6 wird ein Druckrollenpaar verwendet, das mit Hilfe eines pneumatisch oder hydraulisch beaufschlagbaren Arbeitszylinders in den Zwischenraum zwischen die Arme 10̸6 einfahrbar ist. Eine solche Antriebseinrichtung ist an sich aus der DE-PS 21 36 782 und DE-OS 34 23 382 bekannt. Die sich von den Schwenkbolzen 10̸5 nach oben erstreckenden Arme 10̸7 sind so geformt, daß sie die Kupplungsansätze 10̸2 hinterfassen können.The drive device 10̸3 has two drive levers 10̸4, of which only the left one can be seen here. They are rotatably mounted about pivot pins 10̸5 extending perpendicular to the plane of the drawing. Your downward-pointing arms 10̸6 are spread for pivoting in the direction of arrow L, against the action of a spring, not shown here, which contracts the lower arms 10̸6. A pair of pressure rollers is used to spread the arms 10̸6, which can be moved into the space between the arms 10̸6 with the aid of a pneumatically or hydraulically actuated working cylinder. Such a drive device is known per se from DE-PS 21 36 782 and DE-OS 34 23 382. The arms 10̸7 extending upwards from the pivot bolts 10̸5 are shaped in such a way that they can reach behind the coupling projections 10̸2.

Beim Gebrauch des Preßwerkzeugs 91 wird zunächst der Preßring 93 geöffnet, so daß die unteren Preßbacken 95 nach außen wegstehen, wie dies strichpunktiert dargestellt ist. Der Preßring 93 kann dann über die Kombination aus Kupplungshülse 10̸1 und Rohrende 10̸8 quer zu deren Längsachse geschoben werden. Aufgrund der Federwirkung der Zugbänder 97 legen sich die Preßbacken 94, 95 am Umfang der Kupplungshülse 10̸1 an, und zwar auch hier nur mit den äußeren Querkanten. Dann wird die Antriebseinrichtung 10̸3 derart angesetzt, daß die oberen Arme 10̸7 der Antriebshebel 10̸4 die Kupplungsansätze 10̸2 außenseitig hinterfassen, wie sich dies aus Figur 1 ersehen läßt. Die Antriebshebel 10̸4 bzw. die Arme 10̸6 werden dann in der vorbeschriebenen Weise gespreizt, so daß die Zugbänder 97 an ihren freien Enden zusammengedrückt werden. Dies hat zur Folge, daß die Kupplungshülse 10̸1 und das Rohrende 10̸8 radial gestaucht werden, wobei sich die unteren Preßbacken 95 selbsttätig in Umfangsrichtung verschieben, und zwar die linke untere Preßbacke 95 im Uhrzeigersinn und die rechte untere Preßbacke entgegen dem Uhrzeigersinn. Dies geschieht solange, bis die Stirnseiten der Preßbacken 94, 95 untereinander zur Anlage kommen, wobei die Gummifedern 98 komprimiert werden. Diese Situation ist in Figur 2 dargestellt.When the pressing tool 91 is used, the pressing ring 93 is first opened, so that the lower pressing jaws 95 protrude outwards, as is shown in broken lines. The press ring 93 can then be pushed across the combination of coupling sleeve 10̸1 and pipe end 10̸8 across its longitudinal axis. Due to the spring action of the drawstrings 97, the press jaws 94, 95 put on the circumference of the coupling sleeve 10-1, and here too only with the outer transverse edges. Then the drive device 10̸3 is set in such a way that the upper arms 10 Antriebs7 of the drive lever 10̸4 grip the coupling projections 10̸2 on the outside, as can be seen from FIG. The drive lever 10̸4 or the arms 10̸6 are then spread in the manner described above, so that the drawstrings 97 are pressed together at their free ends. This has the consequence that the coupling sleeve 10̸1 and the pipe end 10̸8 are radially compressed, the lower press jaws 95 automatically shifting in the circumferential direction, namely the left lower press jaw 95 clockwise and the right lower press jaw counterclockwise. This continues until the end faces of the press jaws 94, 95 come into contact with one another, the rubber springs 98 being compressed. This situation is in Figure 2 shown.

Das Preßwerkzeug 92 ist funktionsmäßig ähnlich ausgebildet wie das Preßwerkzeug 91. Es hat ebenfalls einen Preßring 10̸9, der drei Preßbacken 110̸, 111 gleicher Bogenlänge aufweist. Die obere Preßbacke 110̸ ist fest an einem Preßbackenträger 112 angeordnet, während die beiden unteren Preßbacken 111 in Umfangsrichtung verschieblich an Preßbackenträgern 113 geführt sind. Die unteren Preßbackenträger 113 sind über Schwenkgelenke 114 an dem oberen Preßbackenträger 112 angelenkt.The press tool 92 is functionally similar to the press tool 91. It also has a press ring 10̸9, which has three press jaws 110̸, 111 of the same arc length. The upper press jaw 110̸ is firmly arranged on a press jaw support 112, while the two lower press jaws 111 are guided on the press jaw supports 113 so as to be displaceable in the circumferential direction. The lower press jaw carriers 113 are articulated to the upper press jaw carrier 112 via swivel joints 114.

Die unteren Preßbacken 111 weisen an ihren äußeren Umfängen Einkerbungen 115 auf, in die in den unteren Preßbackenträgern 113 axial verschieblich gelagerte Stifte 116 einfassen. Diese Stifte 116 sind über Druckfedern 117 in Richtung auf die Einkerbungen 115 federbeaufschlagt. Die Stifte 116 und die Einkerbungen 115 sind dabei so angeordnet, daß die Stifte 116 bestrebt sind, die unteren Preßbacken 111 in Umfangsrichtung gegeneinander zu bewegen, also die dargestellte rechte untere Preßbacke 111 im Uhrzeigersinn und die hier nicht dargestellte Preßbacke gegen den Uhrzeigersinn. Hier nicht näher gezeigte Anschläge sorgen dafür, daß die unteren Preßbacken 113 über ein gewisses Maximalmaß hinaus nicht weiter in diesen beiden Richtungen bewegt werden können.The lower pressing jaws 111 have notches 115 on their outer circumferences, into which pins 116 which are axially displaceably mounted engage in the lower pressing jaw carriers 113. These pins 116 are spring-loaded via compression springs 117 in the direction of the notches 115. The pins 116 and the notches 115 are arranged in such a way that the pins 116 endeavor to move the lower pressing jaws 111 against each other in the circumferential direction, that is to say the right lower pressing jaw 111 shown clockwise and the pressing jaw, not shown here, counterclockwise. Stops, not shown here, ensure that the lower press jaws 113 cannot be moved further in these two directions beyond a certain maximum dimension.

An den freien Enden der unteren Preßbackenträger 113 sind senkrecht zur Zeichnungsebene vorstehende Antriebsbolzen 118 angeordnet, die die Funktion der Kupplungsansätze 10̸2 bei dem Preßwerkzeug 91 übernehmen. An diese Antriebsbolzen 118 kann die in der linken Hälfte der Figuren 1 und 2 dargestellte Antriebseinrichtung 10̸3 angesetzt werden, indem die oberen Arme 10̸7 der Antriebshebel 10̸4 an den Außenseiten der Antriebsbolzen 118 angelegt werden.At the free ends of the lower press jaw carriers 113 projecting drive bolts 118 are arranged perpendicular to the plane of the drawing, which take over the function of the coupling lugs 10-2 in the pressing tool 91. The drive device 10̸3 shown in the left half of FIGS. 1 and 2 can be attached to these drive bolts 118 by the upper arms 10̸7 of the drive levers 10̸4 being placed on the outer sides of the drive bolts 118.

Das Preßwerkzeug 92 wird in der gleichen Weise gehandhabt wie das Preßwerkzeug 91. Zunächst wird der Preßring 10̸9 über die Kupplungshülse 10̸1 und das Rohrende 10̸8 quer zu deren Längsachse geschoben, wobei die beiden unteren Preßbackenträger 113 geöffnet, d. h. nach außen geschwenkt sind, wie dies strichpunktiert angedeutet ist. Danach werden die unteren Preßbackenträger 113 an dem Außenumfang der Kupplungshülse 10̸1 zur Anlage gebracht. Die vorerwähnten Anschläge zur Begrenzung der Bewegung der unteren Preßbacken 111 in Umfangsrichtung sind so angeordnet, daß sich bei Anlage an der Kupplungshülse 10̸1 gleich große Spalte 119, 120̸ zwischen den Stirnseiten der Preßbacken 110̸, 111 ergeben.The press tool 92 is handled in the same way as the press tool 91. First, the press ring 10̸9 over the Coupling sleeve 10̸1 and the pipe end 10̸8 pushed transversely to their longitudinal axis, the two lower press jaw carriers 113 being opened, ie pivoted outwards, as is indicated by dash-dotted lines. Then the lower press jaw carriers 113 are brought into contact with the outer circumference of the coupling sleeve 10-1. The abovementioned stops for limiting the movement of the lower pressing jaws 111 in the circumferential direction are arranged such that gaps 119, 120̸ between the end faces of the pressing jaws 110̸, 111 result when the clutch sleeve 10-1 is in contact.

Durch weitere Spreizung der unteren Arme 10̸6 der Antriebshebel 10̸4 werden die unteren Preßbacken 113 nach innen verschwenkt, wobei sich die unteren Preßbacken 111 selbsttätig in Umfangsrichtung M verschieben, und zwar die dargestellte rechte Preßbacke 111 entgegen dem Uhrzeigersinn und die linke, hier nicht dargestellte Preßbacke im Uhrzeigersinn. Dies geht solange, bis die Stirnseiten der Preßbacken 110̸, 111 am Preßende zur Anlage kommen. Dieser Zustand ist in der rechten Hälfte von Figur (2) zu sehen.By further spreading the lower arms 10̸6 of the drive lever 10̸4, the lower press jaws 113 are pivoted inward, the lower press jaws 111 automatically moving in the circumferential direction M, namely the right press jaw 111 shown counterclockwise and the left press jaw, not shown here, in Clockwise. This continues until the end faces of the press jaws 110̸, 111 come to rest at the end of the press. This state can be seen in the right half of Figure (2).

Selbstverständlich können die Preßwerkzeuge 91, 92 auch einteilig ausgebildet sein, d. h. die Antriebseinrichtung 10̸3 über ein entsprechendes Gehäuseteil mit einer der Preßbacken 94, 95 110̸, 111 verbunden sein. In diesem Fall wäre die jeweilige Preßbacke 94, 95, 110̸, 111 vergleichbar mit einem Widerlager, wobei sich die Preßbacken 94, 95, 110̸, 111 beim Preßvorgang jeweils in Richtung auf den Mittelpunkt des Preßraums in geschlossenem Zustand des Preßwerkzeugs 91, 92 bewegen. Dabei kann auch eine der unteren Preßbacken 95, 111 die ortsfest am Preßwerkzeug 91, 92 angeordnete, die Funktion des Widerlagers ausübende Preßbacke 95, 111 sein. In diesem Fall bedarf es nur eines Antriebshebels 10̸4 zum Zusammenziehen der Preßbacken 94, 95, 110̸, 111.Of course, the pressing tools 91, 92 can also be formed in one piece, i. H. the drive device 10̸3 can be connected to one of the press jaws 94, 95 110̸, 111 via a corresponding housing part. In this case, the respective press jaw 94, 95, 110̸, 111 would be comparable to an abutment, the press jaws 94, 95, 110̸, 111 moving during the pressing process in the direction of the center of the press chamber in the closed state of the press tool 91, 92. One of the lower press jaws 95, 111 can also be the press jaw 95, 111 which is arranged in a fixed position on the press tool 91, 92 and performs the function of the abutment. In this case, only one drive lever 10̸4 is required to pull the press jaws 94, 95, 110̸, 111 together.

Claims (11)

Preßwerkzeug (91, 92) zum Verbinden von rohrförmigen Werkstücken (10̸1, 10̸8) mit mehr als zwei Preßbacken (94, 95, 110̸, 11), die mit Hilfe wenigstens einer Antriebseinrichtung (10̸3) derart relativ zueinander bewegbar sind, daß sie aus einer Offenstellung, in der das Preßwerkzeug (91, 92) auf das Werkstück (10̸1, 10̸8) aufsetzbar ist, in eine Preßstellung bringbar sind, in der sich die Preßbacken (94, 95, 110̸, 111) zu einem geschlossenen Preßraum ergänzen, dadurch gekennzeichnet, daß die Preßbacken (94, 95, 110̸, 111) unter Bildung eines Preßrings (93, 10̸9) gelenkartig miteinander verbunden sind, wobei der Preßring (93, 10̸9) zwischen zwei Preßbacken (95, 111) offen ist und mittels der bzw. den Antriebseinrichtung(en) (10̸3) unter Zusammenziehen des Preßrings (93, 10̸9) schließbar ist.Press tool (91, 92) for connecting tubular workpieces (10̸1, 10̸8) with more than two press jaws (94, 95, 110̸, 11), which can be moved relative to one another with the aid of at least one drive device (10̸3) in such a way that they can be moved from one Open position, in which the press tool (91, 92) can be placed on the workpiece (10̸1, 10̸8), can be brought into a press position in which the press jaws (94, 95, 110̸, 111) complement each other to form a closed press chamber, characterized that the press jaws (94, 95, 110̸, 111) are connected to one another in an articulated manner to form a press ring (93, 10̸9), the press ring (93, 10̸9) between two press jaws (95, 111) being open and by means of the or the drive device (s) (10̸3) can be closed by pulling the press ring (93, 10̸9) together. Preßwerkzeug nach Anspruch 1,
dadurch gekennzeichnet, daß die Antriebseinrichtung(en) (10̸3) an den freien Enden des Preßrings (93, 10̸9) angreift bzw. angreifen.Press tool according to claim 1,
characterized in that the drive device (s) (10̸3) acts on the free ends of the press ring (93, 10̸9). Preßwerkzeug nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Antriebseinrichtung(en) (10̸3) von dem Preßring (93, 10̸6) getrennt ist bzw. sind und die Antriebseinrichtung(en) (10̸3) und der Preßring (93, 10̸9) Kupplungselemente (10̸2, 10̸5, 118) aufweisen, über die sie miteinander in Wirkverbindung bringbar sind.Press tool according to claim 1 or 2,
characterized in that the drive device (s) (10̸3) is or are separate from the press ring (93, 10̸6) and the drive device (s) (10̸3) and the press ring (93, 10̸9) coupling elements (10̸2, 10̸5, 118) have over which they can be brought into operative connection. Preßwerkzeug nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß der Preßring (93) wenigstens ein außenseitig an zumindest den bewegbaren Preßbacken (95) anliegendes Zugband (97) aufweist, über das bzw. die die Preßbacken (94, 95) zusammenbewegbar sind.Press tool according to one of claims 1 to 3,
characterized in that the press ring (93) has at least one tension band (97) on the outside against at least the movable press jaws (95), by means of which the press jaws (94, 95) can be moved together. Preßwerkzeug nach Anspruch 4,
dadurch gekennzeichnet, daß zwei Zugbänder (97) vorgesehen sind, die im Bereich der freien Enden des Preßrings (93) zusammenziehbar sind.Press tool according to claim 4,
characterized in that two tension bands (97) are provided which can be contracted in the region of the free ends of the press ring (93). Preßwerkzeug nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß zumindest ein Teil der Preßbacken (94, 95; 111) in Preßbackenträgern (97; 113) relativ zu diesen bewegbar geführt ist.Press tool according to one of claims 1 to 5,
characterized in that at least some of the press jaws (94, 95; 111) are guided in the press jaw carriers (97; 113) so as to be movable relative to them. Preßwerkzeug nach Anspruch 6,
dadurch gekennzeichnet, daß Führungseinrichtungen für die bewegbaren Preßbacken (95; 111) dergestalt vorgesehen sind, daß deren stirnseitigen Abstände zu Beginn des Preßvorgangs gleich sind.Press tool according to claim 6,
characterized in that guide devices for the movable pressing jaws (95; 111) are provided in such a way that their end distances are the same at the beginning of the pressing process. Preßwerkzeug nach Anspruch 6 oder 7,
dadurch gekennzeichnet, daß die Preßbacken (95; 111) im wesentlichen in Umfangsrichtung beweglich geführt sind.Press tool according to claim 6 or 7,
characterized in that the pressing jaws (95; 111) are guided so that they can move substantially in the circumferential direction. Preßbacken nach Anspruch 8,
dadurch gekennzeichnet, daß die Führungseinrichtungen eine Kulissenführung aufweisen.Press jaws according to claim 8,
characterized in that the guide devices have a link guide. Preßwerkzeug nach Anspruch 8 oder 9,
dadurch gekennzeichnet, daß die Führungseinrichtungen eine gegen Anschläge gerichtete Federbeaufschlagung (98; 115 bis 117) aufweisen.Press tool according to claim 8 or 9,
characterized in that the guide means have spring action (98; 115 to 117) directed against stops. Preßwerkzeug nach einem der Ansprüche 1 bis 10̸,
dadurch gekennzeichnet, daß die Preßbacken (94, 95; 110̸, 111) in Umfangsrichtung gleich lang ausgebildet sind.Press tool according to one of claims 1 to 10̸,
characterized in that the press jaws (94, 95; 110̸, 111) are of equal length in the circumferential direction.
EP94110654A 1990-04-12 1991-04-10 Press tool Expired - Lifetime EP0627273B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4011822 1990-04-12
DE4011822 1990-04-20
EP91105662A EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool

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EP91105662.0 Division 1991-04-10

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EP0627273A2 true EP0627273A2 (en) 1994-12-07
EP0627273A3 EP0627273A3 (en) 1995-06-14
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EP91105663A Expired - Lifetime EP0452791B1 (en) 1990-04-12 1991-04-10 Press tool
EP94110655A Expired - Lifetime EP0628362B1 (en) 1990-04-12 1991-04-10 Press tool
EP91105662A Expired - Lifetime EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool

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EP94110655A Expired - Lifetime EP0628362B1 (en) 1990-04-12 1991-04-10 Press tool
EP91105662A Expired - Lifetime EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool

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US (1) US5148698A (en)
EP (4) EP0627273B1 (en)
JP (2) JPH0768329A (en)
AT (4) ATE116880T1 (en)
CA (2) CA2040278C (en)
DE (5) DE9007414U1 (en)
DK (4) DK0451806T3 (en)
ES (4) ES2062596T3 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997028929A1 (en) * 1996-02-09 1997-08-14 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Press apparatus
EP1095739A3 (en) * 1999-10-26 2001-08-08 Novartec AG Press tool and method of cold-working a connection between workpieces
US6369560B1 (en) 1999-08-17 2002-04-09 Novopress Gmbh Pressen Und Presswerkzeuge & Co., Kg Handleable working device, in particular pressing device
EP1201371A3 (en) * 2000-10-26 2003-09-10 Franz Viegener II GmbH & Co. KG. Press tool
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WO1997028929A1 (en) * 1996-02-09 1997-08-14 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Press apparatus
US6164106A (en) * 1996-02-09 2000-12-26 Novopress Gmbh Pressen Und Presserkzeuge & Co. Kg Press apparatus
US6369560B1 (en) 1999-08-17 2002-04-09 Novopress Gmbh Pressen Und Presswerkzeuge & Co., Kg Handleable working device, in particular pressing device
EP1095739A3 (en) * 1999-10-26 2001-08-08 Novartec AG Press tool and method of cold-working a connection between workpieces
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CH693984A5 (en) * 1999-10-26 2004-05-28 Ridge Tool Ag Press tool for cold shaping a joint between two pipes at their inserted overlap has press pads with openings brought together around the pipe joint for the application of force to give a cold shaping on the workpieces
EP1201371A3 (en) * 2000-10-26 2003-09-10 Franz Viegener II GmbH & Co. KG. Press tool
DE102009032113A1 (en) 2009-07-08 2011-01-13 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Pressing tool and method for pressing in particular tubular workpieces
EP2272629A1 (en) 2009-07-08 2011-01-12 Novopress GmbH Pressen und Presswerkzeuge & Co. KG Press tool and method for pressing in particular tubular workpieces
DE202009009456U1 (en) 2009-07-15 2010-11-25 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft Pressing tool for connecting in particular tubular workpieces
WO2011006778A1 (en) 2009-07-15 2011-01-20 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Press tool for connecting in particular tubular workpieces
US8782863B2 (en) 2009-07-15 2014-07-22 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Press tool for connecting in particular tubular workpieces
DE202011004817U1 (en) 2011-04-04 2011-06-01 Novopress GmbH Pressen und Presswerkzeuge & Co. KG, 41460 Pressing tool and pressed press fitting
DE202011004815U1 (en) 2011-04-04 2011-06-01 Novopress GmbH Pressen und Presswerkzeuge & Co. KG, 41460 Pressing tool and pressed press fitting
EP2508275A1 (en) 2011-04-04 2012-10-10 Novopress GmbH Pressen und Presswerkzeuge & Co. KG Press tool and pressed press fitting
DE202011100316U1 (en) 2011-05-05 2011-07-14 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Pressing tool and pressed press fitting
DE202011101995U1 (en) 2011-06-17 2012-09-19 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg press member
DE202013007496U1 (en) 2013-08-21 2014-11-28 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Pressing sling for connecting in particular tubular workpieces
EP2848369A2 (en) 2013-08-21 2015-03-18 Novopress GmbH Pressen und Presswerkzeuge & Co. KG Press sling in particular for connecting tubular workpieces
DE102014115358A1 (en) * 2014-10-22 2016-04-28 Michael Schmitz press tool

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EP0451806A1 (en) 1991-10-16
ATE116880T1 (en) 1995-01-15
CA2040278C (en) 2001-10-02
JP3334892B2 (en) 2002-10-15
DE59102895D1 (en) 1994-10-20
DE9007414U1 (en) 1991-07-18
EP0627273A3 (en) 1995-06-14
ATE167414T1 (en) 1998-07-15
DE59109090D1 (en) 1999-02-25
DK0627273T3 (en) 1999-09-06
CA2040277C (en) 2001-12-04
EP0452791B1 (en) 1994-09-14
DE59104196D1 (en) 1995-02-23
JPH0768330A (en) 1995-03-14
DE59109014D1 (en) 1998-07-23
EP0628362A3 (en) 1995-06-14
JPH0768329A (en) 1995-03-14
DE59109090C5 (en) 2011-01-05
DK0451806T3 (en) 1995-05-22
ES2119935T3 (en) 1998-10-16
DK0628362T3 (en) 1999-04-06
ATE175599T1 (en) 1999-01-15
EP0452791A1 (en) 1991-10-23
EP0628362B1 (en) 1998-06-17
US5148698A (en) 1992-09-22
CA2040278A1 (en) 1991-10-13
EP0628362A2 (en) 1994-12-14
ES2067077T3 (en) 1995-03-16
CA2040277A1 (en) 1991-10-13
EP0627273B1 (en) 1999-01-13
EP0451806B1 (en) 1995-01-11
ATE111385T1 (en) 1994-09-15
ES2129089T3 (en) 1999-06-01
DK0452791T3 (en) 1994-12-12
ES2062596T3 (en) 1994-12-16

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