EP0627273B1 - Press tool - Google Patents

Press tool Download PDF

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Publication number
EP0627273B1
EP0627273B1 EP94110654A EP94110654A EP0627273B1 EP 0627273 B1 EP0627273 B1 EP 0627273B1 EP 94110654 A EP94110654 A EP 94110654A EP 94110654 A EP94110654 A EP 94110654A EP 0627273 B1 EP0627273 B1 EP 0627273B1
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EP
European Patent Office
Prior art keywords
pressing
jaws
press
pressing ring
combination according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP94110654A
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German (de)
French (fr)
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EP0627273A3 (en
EP0627273A2 (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 method for producing a pipe connection according to the preamble of claim 1 and a combination according to the preamble of claim 2.
  • Such a method and such a combination is known from DE-A-2118782.
  • Coupling sleeves are used to connect pipe ends, which are plastically deformable and made of metal, preferably made of Steel. Their inside diameter is so much larger than the outer diameter of the pipe ends to be connected that they at radial compression until it lies against the lateral surface the pipe ends are permanently deformed. After DE-PS 11 87 87 ⁇ can such coupling sleeves on the inside have an annular groove near each end, in which an elastic sealing ring is inserted.
  • the radial compression takes place by means of pressing tools, as they are known for example from DE-PS 21 36 782.
  • This press tool has two two-armed each Clamping jaws, at least one of which is pivotable on the Press tool is stored.
  • the press jaws have circular arc sections forming press surfaces with the same radii on include a press room. Instead of as arc sections the press surfaces can also be contoured, for example to form a polygonal or oval press room.
  • the arms of the press jaws located away from the press chamber can be spread against the action of a spring with the result that the pressing jaws move against each other in the area of the pressing space become.
  • the spreading is done by means of juxtaposed and adjacent pressure rollers that work together by means of a drive device in the form of a working cylinder between the arms and in this way the Swivel the press jaws.
  • the press tool represents a further development of this press tool according to the preamble of claim 1 and is in DE-OS 34 23 283 described.
  • This press tool two press jaws are provided, each on a drive lever are pivotally mounted, which in turn is pivotable on the Press tool are guided.
  • the drive levers face each other Arms up by means of a working cylinder in the Retractable pressure rollers can be spread and move the press jaws towards each other in this way.
  • the Press jaws are additionally guided in the backdrop such that when pivoting the drive lever in the opening direction are pivoted around their pivot points on the drive levers, so that there is a wide, mouth-like opening arises, which accommodates the one to be connected Pipe ends or a coupling sleeve facilitated.
  • This press tool has proven itself if one is not too big Reduction in diameter or press-in depth is required. At greater press-in depths, which are required when the Pipe connection is designed to withstand higher internal pressures required to provide more than two press jaws for it not to form between the end faces of the press jaws comes from outwardly projecting webs, which is a complete would prevent the pressing jaws from closing.
  • Such pressing tools are for example in DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 and DE-AS 19 ⁇ 7 956.
  • everyone the pressing tools disclosed therein have in common that all Press 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 are also expensive.
  • the invention has for its object a method and a combination of type mentioned so that it is despite the arrangement of more than two press jaws as simple as possible and therefore easy to handle and inexpensive to manufacture is.
  • the press tool is then formed in two parts, the press ring first placed around the workpiece and then the drive device is attached to the press ring.
  • the pressing tool is very advantageous in its handling because the individual parts have a much lower weight and are independent are manageable from each other.
  • the press ring can be at least one on the outside of at least the Movable press jaws have adjacent drawstring over which or the press jaws can be moved together, for this purpose two drawstrings can also be provided. This execution is particularly weight and cost saving.
  • the press jaws are of equal length in the circumferential direction, so that the gap between the opposite ends the press jaws are evenly distributed over the circumference.
  • FIG. 1 and 2 show two pressing tools 91, 92, half each.
  • the press tool 91 On the axis of symmetry left half of Figures 1 and 2 is the press tool 91 and the pressing tool 92 is shown on the right half.
  • Both pressing tools 91, 92 are mirror-symmetrical, so that their structure is derived from the representation of their halves results.
  • the pressing tool shown in the left halves of Figures 1 and 2 91 has a press ring 93, which consists of a total of three Press jaws 94, 95, because of the half-sided representation the press jaw 94 only partially and a press jaw - namely the right one - cannot be seen at all.
  • a press jaw 94 At the upper press jaw 94 is a spring steel by means of a screw 96 existing, flexible drawstring 97 attached, the over the circumference of the upper press jaw 94 and the left press jaw 95 extends. A corresponding drawstring runs to other side of the press ring 93, not shown here.
  • the lower press jaws 95 are displaceable in the circumferential direction K. performed on the drawstrings 97.
  • One rubber spring 98 each summarizes in recesses in the opposite ends of the Press jaws 94, 95 and is vulcanized onto them. In unpolluted Condition the press jaws 94, 95 by the rubber springs 98 apart by a certain amount so that between the opposite faces of the press jaws 94, 95 column 99, 1 ⁇ of the same width if the press jaws 94, 95 rest on the outside on a coupling sleeve 1 ⁇ 1.
  • the press tool 91 thus consists of two independent Parts that can be coupled together.
  • the drive device 1 ⁇ 3 has two drive levers 1 ⁇ 4, of which only the left one can be seen here. They are around vertically pivot pins 1 ⁇ 5 extending to the drawing plane rotatably mounted. Your arms pointing down will be 1 ⁇ 6 spread for pivoting in the direction of arrow L, namely against the effect of a not shown here, the lower arms 1 ⁇ 6 contracting spring. For spreading the arms 1 ⁇ 6 a pair of pressure rollers is used, which with the help of a Pneumatically or hydraulically actuated working cylinder is retractable into the space between the arms 1 ⁇ 6. A such drive device is in itself from the DE-PS 21 36 782 and DE-OS 34 23 382 known. Which is different from the Swivel pins 1 ⁇ 5 upwardly extending arms 1 ⁇ 7 are shaped that they can grip the coupling lugs 1 ⁇ 2.
  • the press ring When using the press tool 91, the press ring is first 93 opened so that the lower press jaws 95 protrude outwards as shown in dash-dotted lines.
  • the press ring 93 can then on the combination of coupling sleeve 1 ⁇ 1 and Pipe ends 1 ⁇ 8 are pushed transversely to their longitudinal axis. Because of the spring action of the drawstrings 97 put the press jaws 94, 95 on the circumference of the coupling sleeve 1 ⁇ 1 here too only with the outer transverse edges.
  • the drive device 1 ⁇ 3 so that the upper arms 1 ⁇ 7 the drive lever 1 ⁇ 4 grasp the coupling lugs 1 ⁇ 2 on the outside, as can be seen from Figure 1.
  • the press tool 92 is functionally similar to the press tool 91. It also has a press ring 1 ⁇ 9 which has three press jaws 11 ⁇ , 111 of the same arc length.
  • the upper Press jaw 11 ⁇ is firmly arranged on a press jaw support 112, while the two lower press jaws 111 in the circumferential direction are slidably guided on press jaw carriers 113.
  • the lower press jaw carriers 113 are on swivel joints 114 the upper jaw support 112 articulated.
  • the lower press jaws 111 have on their outer peripheries Notches 115 on, in the lower die supports Bound 113 pins 116 axially slidably. This Pins 116 are over compression springs 117 toward the notches 115 spring loaded. Pins 116 and the notches 115 are arranged so that the pins 116 strive are, the lower press jaws 111 in the circumferential direction against each other to move, that is the lower right Press jaw 111 clockwise and the one not shown here Press jaw counterclockwise. Not shown here Stops ensure that the lower press jaws 113 over one certain maximum extent no further in these two directions can be moved.
  • the die 92 is handled in the same manner as the press tool 91.
  • the press ring 1 ⁇ 9 over the Coupling sleeve 1 ⁇ 1 and the pipe end 1 ⁇ 8 transverse to their longitudinal axis pushed the two lower jaw supports 113 open, d. H. are pivoted outwards, as this is dash-dotted is indicated.
  • the lower press jaw carriers 113 brought to bear on the outer circumference of the coupling sleeve 1 ⁇ 1.
  • the aforementioned stops to limit movement the lower pressing jaws 111 in the circumferential direction are arranged that the same size when in contact with the coupling sleeve 1 ⁇ 1 Column 119, 12 ⁇ between the end faces of the press jaws 11 ⁇ , 111 result.
  • the pressing tools 91, 92 can also be in one piece be trained, d. H. the drive device 1 ⁇ 3 a corresponding housing part with one of the press jaws 94, 95 11 ⁇ , 111 be connected.
  • the respective press jaw would be 94, 95, 11 ⁇ , 111 comparable to an abutment, where the press jaws 94, 95, 11 ⁇ , 111 each during the pressing process towards the center of the baling chamber in closed
  • the lower press jaws 95, 111 which are stationary on the press tool 91, 92 arranged, the function of the abutment pressing jaw 95, 111.
  • only one drive lever is required 1 ⁇ 4 for pulling the press jaws 94, 95, 11 ⁇ , 111.

Abstract

A press tool (91, 92) for connecting tubular workpieces (101, 108) has more than two pressing jaws (94, 95, 110, 111) and these can be moved relative to one another in such a way with the aid of at least one driving device (103) that they can be moved out of an open position, in which the press tool can be placed on the workpiece (101, 108), into a pressing position, in which the pressing jaws (94, 95, 110, 111) complement one another to form a closed pressing space. According to the invention, the pressing jaws (94, 95, 110, 111) are connected to one another in a jointed manner to form a pressing ring (93, 109), the pressing ring (93, 109) being open between two pressing jaws (95, 111) and being closable by means of the driving device(s) (103) thereby being drawn together. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Rohr verbindung gemäß dem Oberbegriff des Anspruchs 1 und eine Kombination gemäß dem Oberbegriff des Anspruchs 2. Ein derartiges Verfahren und eine derartige Kombination sind aus der DE-A-2118782 bekannt.The invention relates to a method for producing a pipe connection according to the preamble of claim 1 and a combination according to the preamble of claim 2. Such a method and such a combination is known from DE-A-2118782.

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 87⊘ 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 made of Steel. Their inside diameter is so much larger than the outer diameter of the pipe ends to be connected that they at radial compression until it lies against the lateral surface the pipe ends are permanently deformed. After DE-PS 11 87 87⊘ can such coupling sleeves on the inside have an annular groove near each end, in 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 they are known for example from DE-PS 21 36 782. This press tool has two two-armed each Clamping jaws, at least one of which is pivotable on the Press tool is stored. The press jaws have circular arc sections forming press surfaces with the same radii on include a press room. Instead of as arc sections the press surfaces can also be contoured, for example to form a polygonal or oval press room.

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 away from the press chamber can be spread against the action of a spring with the result that the pressing jaws move against each other in the area of the pressing space become. The spreading is done by means of juxtaposed and adjacent pressure rollers that work together by means of a drive device in the form of a working cylinder between the arms and in this way the Swivel 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.The press tool represents a further development of this press tool according to the preamble of claim 1 and is in DE-OS 34 23 283 described. With this press tool two press jaws are provided, each on a drive lever are pivotally mounted, which in turn is pivotable on the Press tool are guided. The drive levers face each other Arms up by means of a working cylinder in the Retractable pressure rollers can be spread and move the press jaws towards each other in this way. The Press jaws are additionally guided in the backdrop such that when pivoting the drive lever in the opening direction are pivoted around their pivot points on the drive levers, so that there is a wide, mouth-like opening arises, which accommodates the one to be connected Pipe ends 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 swiveling the drive lever in the opposite direction the jaws are pivoted again so that the perpendicular approximately collapse on their arc sections and the clamping jaws when the drive lifts continue to pivot can be moved parallel to each other. During the pressing process the jaws are moved further against each other, until they enclose a circular area at the end of the press and thereby the Pipe ends or the coupling sleeve accordingly with a reduction in diameter have deformed.

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 ⊘7 956 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 if one is not too big Reduction in diameter or press-in depth is required. At greater press-in depths, which are required when the Pipe connection is designed to withstand higher internal pressures required to provide more than two press jaws for it not to form between the end faces of the press jaws comes from outwardly projecting webs, which is a complete Would prevent the pressing jaws from closing. Such pressing tools are for example in DE-OS 21 18 782, DE-OS 35 13 129, DE-AS 25 11 942 and DE-AS 19 ⊘7 956. Everyone the pressing tools disclosed therein have in common that all Press 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 are also expensive.

In der DE-C-11 98 147 bzw. US-A-2 973 ⊘24 ist ein Montagewerkzeug beschrieben, das dazu dienen soll, ein Schlauchende mit einer eingesteckten Tülle zu verbinden. Hierzu weist das Schlauchende Spannbacken auf, die mit Hilfe des Montagewerkzeugs radial nach innen unter Komprimierung des Schlauchendes bewegt werden. In der Endstellung kann über die Spannbacken ein Klemmring geschoben werden, der die Spannbacken und damit das Schlauchende und die Tülle zusammenhalten, wenn das Montagewerkzeug wieder entfernt wird.In DE-C-11 98 147 and US-A-2 973 ⊘24 is an assembly tool described, which is intended to have a hose end to connect an inserted grommet. For this, the Hose end jaws on with the help of the assembly tool radially inwards with compression of the hose end be moved. In the end position, the jaws can be used a clamping ring can be pushed, the clamping jaws and thus Hold the hose end and the grommet together when the assembly tool is removed again.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Kombination 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 has for its object a method and a combination of type mentioned so that it is despite the arrangement of more than two press jaws as simple as possible and therefore easy to handle and inexpensive to manufacture is.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale der Ansprüche 1 und 2 gelöst. This object is achieved by the features of claims 1 and 2 solved.

Dies eröffnet die Möglichkeit, die Antriebseinrichtung(en) von dem Preßring getrennt auszubilden und die Antriebseinrichtung(en) und den Preßring mit Kupplungselementen auszustatten, 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 opens up the possibility of the drive device (s) separate from the press ring and the Drive device (s) and the press ring with coupling elements equip, through which they interact with each other are feasible. The press tool is then formed in two parts, the press ring first placed around the workpiece and then the drive device is attached to the press ring. The pressing tool is very advantageous in its handling because the individual parts have a much lower weight and are independent are manageable from each other.

Der Preßring kann 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.The press ring can be at least one on the outside of at least the Movable press jaws have adjacent drawstring over which or the press jaws can be moved together, for this purpose two drawstrings can also be provided. This execution is particularly weight and cost saving.

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 gap between the opposite ends the press jaws are evenly 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. On the axis of symmetry left half of Figures 1 and 2 is the press tool 91 and the pressing tool 92 is shown on the right half. Both pressing tools 91, 92 are mirror-symmetrical, so that their structure is derived from the representation of their halves results.

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 shown in the left halves of Figures 1 and 2 91 has a press ring 93, which consists of a total of three Press jaws 94, 95, because of the half-sided representation the press jaw 94 only partially and a press jaw - namely the right one - cannot be seen at all. At the upper press jaw 94 is a spring steel by means of a screw 96 existing, flexible drawstring 97 attached, the over the circumference of the upper press jaw 94 and the left press jaw 95 extends. A corresponding drawstring runs to 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, 1⊘⊘ gleicher Breite ergeben, wenn die Preßbacken 94, 95 außenseitig auf einer Kupplungshülse 1⊘1 anliegen.The lower press jaws 95 are displaceable in the circumferential direction K. performed on the drawstrings 97. One rubber spring 98 each summarizes in recesses in the opposite ends of the Press jaws 94, 95 and is vulcanized onto them. In unpolluted Condition the press jaws 94, 95 by the rubber springs 98 apart by a certain amount so that between the opposite faces of the press jaws 94, 95 column 99, 1⊘⊘ of the same width if the press jaws 94, 95 rest on the outside on a coupling sleeve 1⊘1.

An den freien Enden der Zugbänder 97 sind außenseitig Kupplungsansätze 1⊘2 angebracht. An diesen Kupplungsansätzen 1⊘2 kann eine hier nur schematisch und strichpunktiert dargestellte Antriebseinrichtung 1⊘3 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 there are coupling lugs on the outside 1⊘2 attached. At these coupling approaches 1⊘2 can a drive device shown here only schematically and in dot-dash lines 1⊘3 are set by the press ring 93rd is separated. The press tool 91 thus consists of two independent Parts that can be coupled together.

Die Antriebseinrichtung 1⊘3 weist zwei Antriebshebel 1⊘4 auf, von denen hier nur der linke zu sehen ist. Sie sind um senkrecht zur Zeichnungsebene sich erstreckende Schwenkbolzen 1⊘5 verdrehbar gelagert. Ihre nach unten zeigenden Arme 1⊘6 werden zum Verschwenken in Richtung des Pfeils L gespreizt, und zwar gegen die Wirkung einer hier nicht näher dargestellten, die unteren Arme 1⊘6 zusammenziehenden Feder. Zum Spreizen der Arme 1⊘6 wird ein Druckrollenpaar verwendet, das mit Hilfe eines pneumatisch oder hydraulisch beaufschlagbaren Arbeitszylinders in den Zwischenraum zwischen die Arme 1⊘6 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 1⊘5 nach oben erstreckenden Arme 1⊘7 sind so geformt, daß sie die Kupplungsansätze 1⊘2 hinterfassen können.The drive device 1⊘3 has two drive levers 1⊘4, of which only the left one can be seen here. They are around vertically pivot pins 1⊘5 extending to the drawing plane rotatably mounted. Your arms pointing down will be 1⊘6 spread for pivoting in the direction of arrow L, namely against the effect of a not shown here, the lower arms 1⊘6 contracting spring. For spreading the arms 1⊘6 a pair of pressure rollers is used, which with the help of a Pneumatically or hydraulically actuated working cylinder is retractable into the space between the arms 1⊘6. A such drive device is in itself from the DE-PS 21 36 782 and DE-OS 34 23 382 known. Which is different from the Swivel pins 1⊘5 upwardly extending arms 1⊘7 are shaped that they can grip the coupling lugs 1⊘2.

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 1⊘1 und Rohrende 1⊘8 quer zu deren Längsachse geschoben werden. Aufgrund der Federwirkung der Zugbänder 97 legen sich die Preßbacken 94, 95 am Umfang der Kupplungshülse 1⊘1 an, und zwar auch hier nur mit den äußeren Querkanten. Dann wird die Antriebseinrichtung 1⊘3 derart angesetzt, daß die oberen Arme 1⊘7 der Antriebshebel 1⊘4 die Kupplungsansätze 1⊘2 außenseitig hinterfassen, wie sich dies aus Figur 1 ersehen läßt. Die Antriebshebel 1⊘4 bzw. die Arme 1⊘6 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 1⊘1 und das Rohrende 1⊘8 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 using the press tool 91, the press ring is first 93 opened so that the lower press jaws 95 protrude outwards as shown in dash-dotted lines. The press ring 93 can then on the combination of coupling sleeve 1⊘1 and Pipe ends 1⊘8 are pushed transversely to their longitudinal axis. Because of the spring action of the drawstrings 97 put the press jaws 94, 95 on the circumference of the coupling sleeve 1⊘1 here too only with the outer transverse edges. Then the drive device 1⊘3 so that the upper arms 1⊘7 the drive lever 1⊘4 grasp the coupling lugs 1⊘2 on the outside, as can be seen from Figure 1. The drive levers 1⊘4 or arms 1⊘6 are then described in the Way spread so that the drawstrings 97 at their free ends be squeezed together. This has the consequence that the coupling sleeve 1⊘1 and the pipe end 1⊘8 are radially compressed, whereby the lower press jaws 95 automatically in the circumferential direction move, namely the lower left press jaw 95 clockwise and the lower right press jaw counterclockwise. This happens until the end faces of the press jaws 94, 95 come into contact with each other, the rubber springs 98 can be compressed. This situation is in Figure 2 shown.

Das Preßwerkzeug 92 ist funktionsmäßig ähnlich ausgebildet wie das Preßwerkzeug 91. Es hat ebenfalls einen Preßring 1⊘9, der drei Preßbacken 11⊘, 111 gleicher Bogenlänge aufweist. Die obere Preßbacke 11⊘ 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 1⊘9 which has three press jaws 11⊘, 111 of the same arc length. The upper Press jaw 11⊘ is firmly arranged on a press jaw support 112, while the two lower press jaws 111 in the circumferential direction are slidably guided on press jaw carriers 113. The lower press jaw carriers 113 are on swivel joints 114 the upper jaw support 112 articulated.

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 press jaws 111 have on their outer peripheries Notches 115 on, in the lower die supports Bound 113 pins 116 axially slidably. This Pins 116 are over compression springs 117 toward the notches 115 spring loaded. Pins 116 and the notches 115 are arranged so that the pins 116 strive are, the lower press jaws 111 in the circumferential direction against each other to move, that is the lower right Press jaw 111 clockwise and the one not shown here Press jaw counterclockwise. Not shown here Stops ensure that the lower press jaws 113 over one certain maximum extent no further in these two directions can be moved.

An den freien Enden der unteren Preßbackenträger 113 sind senkrecht zur Zeichnungsebene vorstehende Antriebsbolzen 118 angeordnet, die die Funktion der Kupplungsansätze 1⊘2 bei dem Preßwerkzeug 91 übernehmen. An diese Antriebsbolzen 118 kann die in der linken Hälfte der Figuren 1 und 2 dargestellte Antriebseinrichtung 1⊘3 angesetzt werden, indem die oberen Arme 1⊘7 der Antriebshebel 1⊘4 an den Außenseiten der Antriebsbolzen 118 angelegt werden.At the free ends of the lower press jaw carriers 113 are vertical arranged drive pin 118 protruding from the plane of the drawing, the function of the coupling approaches 1⊘2 in the press tool 91 take over. The in the left half of Figures 1 and 2 drive device shown 1⊘3 by using the upper arms 1⊘7 of the Drive lever 1⊘4 placed on the outside of the drive pin 118 become.

Das Preßwerkzeug 92 wird in der gleichen Weise gehandhabt wie das Preßwerkzeug 91. Zunächst wird der Preßring 1⊘9 über die Kupplungshülse 1⊘1 und das Rohrende 1⊘8 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 1⊘1 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 1⊘1 gleich große Spalte 119, 12⊘ zwischen den Stirnseiten der Preßbacken 11⊘, 111 ergeben.The die 92 is handled in the same manner as the press tool 91. First, the press ring 1⊘9 over the Coupling sleeve 1⊘1 and the pipe end 1⊘8 transverse to their longitudinal axis pushed, the two lower jaw supports 113 open, d. H. are pivoted outwards, as this is dash-dotted is indicated. Then the lower press jaw carriers 113 brought to bear on the outer circumference of the coupling sleeve 1⊘1. The aforementioned stops to limit movement the lower pressing jaws 111 in the circumferential direction are arranged that the same size when in contact with the coupling sleeve 1⊘1 Column 119, 12⊘ between the end faces of the press jaws 11⊘, 111 result.

Durch weitere Spreizung der unteren Arme 1⊘6 der Antriebshebel 1⊘4 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 11⊘, 111 am Preßende zur Anlage kommen. Dieser Zustand ist in der rechten Hälfte von Figur (2) zu sehen.By further spreading the lower arms 1⊘6 of the drive lever 1⊘4 the lower press jaws 113 are pivoted inwards, the lower press jaws 111 automatically in the circumferential direction M move, namely the right press jaw shown 111 counterclockwise and the left one, not here shown press jaw clockwise. This goes on until the end faces of the press jaws 11⊘, 111 at the press end to the system come. This state is in the right half of figure (2) to see.

Selbstverständlich können die Preßwerkzeuge 91, 92 auch einteilig ausgebildet sein, d. h. die Antriebseinrichtung 1⊘3 über ein entsprechendes Gehäuseteil mit einer der Preßbacken 94, 95 11⊘, 111 verbunden sein. In diesem Fall wäre die jeweilige Preßbacke 94, 95, 11⊘, 111 vergleichbar mit einem Widerlager, wobei sich die Preßbacken 94, 95, 11⊘, 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 1⊘4 zum Zusammenziehen der Preßbacken 94, 95, 11⊘, 111.Of course, the pressing tools 91, 92 can also be in one piece be trained, d. H. the drive device 1⊘3 a corresponding housing part with one of the press jaws 94, 95 11⊘, 111 be connected. In this case the respective press jaw would be 94, 95, 11⊘, 111 comparable to an abutment, where the press jaws 94, 95, 11⊘, 111 each during the pressing process towards the center of the baling chamber in closed Move the state of the pressing tool 91, 92. One can also do this the lower press jaws 95, 111 which are stationary on the press tool 91, 92 arranged, the function of the abutment pressing jaw 95, 111. In this case, only one drive lever is required 1⊘4 for pulling the press jaws 94, 95, 11⊘, 111.

Claims (11)

  1. A method of producing a pipe joint in which tubular workpieces (101, 108), namely a coupling workpiece (101) and a pipe end (108) in each case, are joined by plastic deformation in a radial direction by means of a press tool (91, 92) comprising more than two pressing jaws (94, 95, 110, 111), which pressing jaws are joined hinged to each other with the formation of a pressing ring (93, 109) and which can be moved substantially radially inwards by means of at least one drive device (103), wherein the pressing ring (93, 109) with the pressing jaws (94, 95, 110, 111) is placed round the workpieces (101, 108) for the pressing operation and is then closed, characterised in that a pressing ring (93, 109) is used which after being placed around the workpieces (101, 108) firstly does not completely surround the latter, and that pressing and plastic deformation are then effected by the closure of the pressing ring (93, 109) by means of the drive device(s) (103).
  2. A combination of a press tool (91, 92) on the one hand and of a coupling workpiece (101) and a pipe end (108) as workpieces (101, 108) on the other hand for carrying out the method according to claim 1, having more than two pressing jaws (94, 95, 110, 111) which are joined hinged to each other with the formation of a pressing ring (93, 109) and which can be moved substantially radially inwards by means of at least one drive device (103), wherein the pressing ring (93, 109) can be placed round the workpieces (101, 108) and can then be closed for the pressing operation, characterised in that the geometries of the pressing ring (93, 109) and of the workpieces (101, 108) are matched to each other in such a way that on the one hand the workpieces (101, 108) cannot be completely surrounded by the pressing ring (93, 109) after the latter has been placed round them and on the other hand a pressing operation comprising plastic deformation can be effected by the closure of the pressing ring (93, 109), and that the at least one drive device (103) is constructed so that the pressing ring (93, 109) can be moved by it from its position after being placed round the workpieces (101, 108) into its closed position.
  3. A combination according to claim 2, characterised in that at least one part of the pressing jaws (94, 95; 111) is guided in pressing jaw supports (97; 113) so that it can move in relation thereto.
  4. A combination according to claim 3, characterised in that guide devices are provided for the movable pressing jaws (95; 111), of a form such that the spacings between the end faces of the movable pressing jaws are equal at the start of the pressing operation.
  5. A combination according to claim 4, characterised in that guide devices comprise a connecting link guide.
  6. A combination according to claim 5, characterised in that the guide devices comprise a spring action (98; 115 to 117) which is oriented towards stops.
  7. A combination according to any one of claims 2 to 6, characterised in that the drive device(s) (103) acts or act at the free end of the pressing ring (93, 109).
  8. A combination according to any one of claims 2 to 7, characterised in that the drive device(s) (103) can be separated from the pressing ring (93, 106), and the drive device(s) (103) and the pressing ring (93, 109) comprise coupling elements (102, 105, 118) via which they can be brought into active communication.
  9. A combination according to any one of claims 2 to 8, characterised in that the pressing ring (93) comprises at least one tension band (97), which is seated against the outside of the movable pressing jaw (95) at least and via which the pressing jaws (94, 95) can be moved together.
  10. A combination according to claim 9, characterised in that two tension bands (97) are provided which can be drawn together in the region of the free ends of the pressing ring (93).
  11. A combination according to any one of claims 2 to 10, characterised in that the pressing jaws (94, 95, 110, 111) are constructed so that they are of the same length in the peripheral 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 1990-04-12
EP91105662A EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool

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EP91105662.0 Division 1991-04-10
EP91105662A Division EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool

Publications (3)

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EP0627273A2 EP0627273A2 (en) 1994-12-07
EP0627273A3 EP0627273A3 (en) 1995-06-14
EP0627273B1 true EP0627273B1 (en) 1999-01-13

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EP94110655A Expired - Lifetime EP0628362B1 (en) 1990-04-12 1991-04-10 Press tool
EP91105663A Expired - Lifetime EP0452791B1 (en) 1990-04-12 1991-04-10 Press tool
EP91105662A Expired - Lifetime EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool
EP94110654A Expired - Lifetime EP0627273B1 (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
EP91105663A Expired - Lifetime EP0452791B1 (en) 1990-04-12 1991-04-10 Press tool
EP91105662A Expired - Lifetime EP0451806B1 (en) 1990-04-12 1991-04-10 Press tool

Country Status (8)

Country Link
US (1) US5148698A (en)
EP (4) EP0628362B1 (en)
JP (2) JPH0768329A (en)
AT (4) ATE167414T1 (en)
CA (2) CA2040277C (en)
DE (5) DE9007414U1 (en)
DK (4) DK0628362T3 (en)
ES (4) ES2119935T3 (en)

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Also Published As

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ES2067077T3 (en) 1995-03-16
JPH0768329A (en) 1995-03-14
CA2040277A1 (en) 1991-10-13
DK0628362T3 (en) 1999-04-06
EP0452791B1 (en) 1994-09-14
ATE111385T1 (en) 1994-09-15
DE59104196D1 (en) 1995-02-23
DK0451806T3 (en) 1995-05-22
CA2040278A1 (en) 1991-10-13
CA2040277C (en) 2001-12-04
ES2062596T3 (en) 1994-12-16
ES2119935T3 (en) 1998-10-16
DE59109090C5 (en) 2011-01-05
EP0627273A3 (en) 1995-06-14
EP0452791A1 (en) 1991-10-23
DE59109090D1 (en) 1999-02-25
DE9007414U1 (en) 1991-07-18
ATE167414T1 (en) 1998-07-15
DK0452791T3 (en) 1994-12-12
EP0451806B1 (en) 1995-01-11
EP0628362A2 (en) 1994-12-14
US5148698A (en) 1992-09-22
EP0628362B1 (en) 1998-06-17
JPH0768330A (en) 1995-03-14
CA2040278C (en) 2001-10-02
EP0451806A1 (en) 1991-10-16
DK0627273T3 (en) 1999-09-06
ATE175599T1 (en) 1999-01-15
ATE116880T1 (en) 1995-01-15
JP3334892B2 (en) 2002-10-15
DE59102895D1 (en) 1994-10-20
EP0628362A3 (en) 1995-06-14
EP0627273A2 (en) 1994-12-07
DE59109014D1 (en) 1998-07-23
ES2129089T3 (en) 1999-06-01

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