EP0452791B1 - Press tool - Google Patents

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Publication number
EP0452791B1
EP0452791B1 EP91105663A EP91105663A EP0452791B1 EP 0452791 B1 EP0452791 B1 EP 0452791B1 EP 91105663 A EP91105663 A EP 91105663A EP 91105663 A EP91105663 A EP 91105663A EP 0452791 B1 EP0452791 B1 EP 0452791B1
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EP
European Patent Office
Prior art keywords
compression
jaws
press tool
press
pressing
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Expired - Lifetime
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EP91105663A
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German (de)
French (fr)
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EP0452791A1 (en
Inventor
Helmut Dipl.-Ing. Dischler
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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 according to the preamble of claim 1, such as. known from US-A-3706219.
  • 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 1 187 870 ⁇ , such coupling sleeves can additionally 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.
  • the pressing surfaces can also be contoured instead of as circular arc sections be, for example, to form a polygonal or oval press room.
  • 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.
  • the clamping jaws When pivoting the drive lever in the opposite direction, the clamping jaws are pivoted again so that the perpendicular bisectors approximately collapse on their arc sections and the clamping jaws are displaced parallel to one another when the drive lever is pivoted further.
  • the clamping jaws are moved towards each other until they enclose a circular area at the end of the press and thereby the pipe ends or the coupling sleeve have deformed accordingly while reducing the diameter.
  • This press tool has proven itself when a not too large diameter reduction or insertion depth is required. For greater press-in depths, which are required if the pipe connections are 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 21 182, 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.
  • the pressing tool according to the invention is characterized by a simple structure, since at least two pressing jaws are displaceably guided in the pressing jaw carrier (s) and only the pressing jaw carriers have a connection to the drive device. There is therefore no need to provide a drive device for each press jaw. Accordingly, this press tool is easy to handle and inexpensive to manufacture.
  • the press jaws have circular arc sections of equal length, that is to say the gaps between the end faces of the press jaws are distributed uniformly over the circumference.
  • Two oppositely directed pressing jaw carriers each with two movable pressing jaws, are expediently provided.
  • a further division of the press jaws results from the fact that a press jaw held immovably on the press jaw carrier is arranged on the press jaw carrier (s) between the respective movable press jaws.
  • the movable press jaws should be spring-loaded against a stop in the opening direction of the angle of the movement paths.
  • Guide devices are expediently designed as straight, V-shaped guide tracks for the press jaws which are movably held in the press jaw carriers.
  • Two drive levers (124, 125) are mounted on the frame part (122) as a mirror image of the longitudinal axis (123) so that they can rotate about pivot bolts (126, 127) extending perpendicular to the plane of the drawing.
  • the downward-pointing arms (128, 129) of the drive levers (124, 125) are spread out for pivoting in the directions of the arrows O, P, against the action of a lower arm (128, 129) which does not show here in detail Feather.
  • a pair of pressure rollers is used to spread the lower arms (128, 129), as is described in principle in DE-OS 34 23 283.
  • Press jaw supports (132, 133) are hinged to the arms (130, 131) which extend upwards from the pivot pins (126, 127), specifically via pivot pins (134, 135) which extend perpendicular to the plane of the drawing. These press jaw supports (132, 133) are formed in the center to form press jaws (136, 137). On each side of it, the press jaw supports (132, 133) have flat guide surfaces (138, 139, 140 ⁇ , 141) which extend in a V-shape, the V-angles opening towards one another. On these guide surfaces (138, 139, 140 ⁇ , 141) there are further press jaws (142, 143, 144, 145).
  • the compression jaws (142, 143, 144, 145) are each pressed outwards by means of compression springs (146, 147, 148, 149) which support the compression jaw supports (132, 133) and lie on stops (150 ⁇ , 151, 152 , 153).
  • compression springs 146, 147, 148, 149 which support the compression jaw supports (132, 133) and lie on stops (150 ⁇ , 151, 152 , 153).
  • the guide surfaces (138, 139, 140 141, 141) and the surfaces of the press jaws (142, 143, 144, 145) that are adjacent to them are designed such that the latter cannot fall out when the press tool (121) is open.
  • the lower arms (128, 129) of the drive lever (124, 125) are first pressed together by hand, that is, contrary to the arrows O, P.
  • the upper arms (130 ⁇ , 131) open mouth-like and free up a space so that the pressing tool (121) can be pushed transversely to its longitudinal axis via a coupling sleeve (154), which is put over a pipe end (155).
  • the pressing jaw carriers (132, 133) - which is not shown here - can be guided through scenes such as those described for the pressing tool according to DE-OS 34 23 283 in such a way that they first move apart axially parallel and then by a pivoting movement nash open at the top.
  • the press jaw supports (132, 133) are closed by spreading the lower arms (128, 129) with the aid of the drive device, not shown here.
  • the press jaws (136, 137, 142, 143, 144, 145) then come to rest on the jacket of the coupling sleeve (154), and only with their respective outer transverse edges.
  • the stops (150 ⁇ , 151, 152, 153) are arranged so that between the six press jaws (136, 137, 142, 143, 144, 145) gaps (156, 157, 158, 159, 160 ⁇ , 161) remain are essentially the same size.
  • this pressing tool (171) the drive device, the tool housing and the drive lever are omitted.
  • a compression spring (184, 185) is arranged, which strives to press the pressing jaws (180 ⁇ , 181) or (182, 183) apart , ie to push outwards.
  • the range of motion of the pressing jaws (180 ⁇ , 181, 182, 183) is limited by the limiting pins (186, 187, 188, 189) protruding from the guide surfaces (176, 177, 178, 179), which are shown in Hold recesses (190 ⁇ , 191, 192, 193) in the back of the press jaws (180 ⁇ , 181, 182, 183).
  • the limiting pins (186, 187, 188, 189) are arranged and the recesses (190 ⁇ , 191, 192, 193) are dimensioned such that there is between the end faces of the press jaws (180 ⁇ , 181, 182, 183) when they are in contact with a coupling sleeve , which is slipped over a pipe end (195), form equally large gaps (196, 197, 198, 199).

Landscapes

  • 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)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Adornments (AREA)
  • Earth Drilling (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

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 Preßwerkzeug entsprechend dem Oberbegriff des Anspruchs 1, wie Z.B. aus der US-A-3706219 bekannt.The invention relates to a pressing tool according to the preamble of claim 1, such as. known from US-A-3706219.

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 1 187 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 1 187 870̸, such coupling sleeves can additionally 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. The pressing surfaces can also be contoured instead of as circular arc sections be, 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 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 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 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 Antriebshebel 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 bisectors approximately collapse on their arc sections and the clamping jaws are displaced parallel to one another when the drive lever is pivoted further. During the pressing process, the clamping jaws are moved towards each other until they enclose a circular area at the end of the press and thereby the pipe ends or the coupling sleeve have deformed accordingly while reducing the 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 Rohrverbindungen 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 21 182, 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 greater press-in depths, which are required if the pipe connections are 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 21 182, 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 die Merkmale des Anspruchs 1.This object becomes the characteristics of claim 1.

Das Preßwerkzeug nach der Erfindung zeichnet sich durch einfachen Aufbau aus, da in dem bzw. den Preßbackenträger(n) zumindest zwei Preßbacken verschieblich geführt sind und nur die Preßbackenträger Verbindung zur Antriebseinrichtung haben. Es entfällt also die Notwendigkeit, für jede Preßbacke eine Antriebseinrichtung vorzusehen. Entsprechend ist dieses Preßwerkzeug leicht handhabbar und kostengünstig herzustellen.The pressing tool according to the invention is characterized by a simple structure, since at least two pressing jaws are displaceably guided in the pressing jaw carrier (s) and only the pressing jaw carriers have a connection to the drive device. There is therefore no need to provide a drive device for each press jaw. Accordingly, this press tool is easy to handle and inexpensive to manufacture.

In einer Ausbildung der Erfindung ist vorgesehen, daß die Preßbacken gleichlange Kreisbogenabschnitte aufweisen, die Spalte zwischen den Stirnseiten der Preßbacken also über den Umfang gleichmäßig verteilt sind.In an embodiment of the invention it is provided that the press jaws have circular arc sections of equal length, that is to say the gaps between the end faces of the press jaws are distributed uniformly over the circumference.

Zweckmäßigerweise sind zwei gegeneinander gerichtete Preßbackenträger mit jeweils zwei beweglichen Preßbacken vorgesehen. Es besteht jedoch durchaus die Möglichkeit, auch drei oder noch mehr Preßbackenträger vorzusehen, wobei nicht jeder Preßbackenträger angetrieben sein muß. Eine weitere Aufteilung der Preßbacken ergibt sich dadurch, daß an dem bzw. den Preßbackenträgern zwischen den jeweils beweglichen Preßbacken eine am Preßbackenträger unbeweglich gehaltene Preßbacke angeordnet ist.Two oppositely directed pressing jaw carriers, each with two movable pressing jaws, are expediently provided. However, there is also the possibility of providing three or more pressing jaw carriers, although not every pressing jaw carrier has to be driven. A further division of the press jaws results from the fact that a press jaw held immovably on the press jaw carrier is arranged on the press jaw carrier (s) between the respective movable press jaws.

Die beweglichen Preßbacken sollten in öffnungsrichtung des Winkels der Bewegungsbahnen gegen einen Anschlag federbeaufschlagt sein. Führungseinrichtungen sind zweckmäßigerweise für die in den Preßbackenträgern beweglich gehaltenen Preßbacken als gerade, V-förmig ausgerichtete Führungsbahnen ausgebildet.The movable press jaws should be spring-loaded against a stop in the opening direction of the angle of the movement paths. Guide devices are expediently designed as straight, V-shaped guide tracks for the press jaws which are movably held in the press jaw carriers.

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

Figur ( 1)
ein Preßwerkzeug in Offenstellung;
Figur ( 2)
ein Teil des Preßwerkzeuges gemäß Figur (1) in Schließstellung;
Figur ( 3)
ein Teil eines anderen Preßwerkzeuges in Offenstellung;
Figur ( 4)
das Preßwerkzeug gemäß Figur (3) in Schließstellung;
In den Figuren (1) und (2) ist ein erstes Ausführungsbeispiel der Erfindung dargestellt. Das in diesen Figuren zu sehende Preßwerkzeug (121) hat Ähnlichkeit mit dem nach der DE-OS 34 23 283. Es weist ein Rahmenteil (122) auf, das - was hier nicht näher dargestellt ist - fest mit einer Antriebseinrichtung verbunden ist und die Funktion des Werkzeuggehäuses ausübt.In the drawing, the invention is illustrated in more detail using exemplary embodiments. Show it:
Figure (1)
a press tool in the open position;
Figure (2)
a part of the pressing tool according to Figure (1) in the closed position;
Figure (3)
part of another press tool in the open position;
Figure (4)
the pressing tool according to Figure (3) in the closed position;
A first exemplary embodiment of the invention is shown in FIGS. (1) and (2). The pressing tool (121) seen in these figures has a similarity to that according to DE-OS 34 23 283. It has a frame part (122) which - which is not shown here in more detail - is firmly connected to a drive device and the function of the tool housing.

An dem Rahmenteil (122) sind spiegelbildlich zur Längsachse (123) zwei Antriebshebel (124, 125) um sich senkrecht zur Zeichnungsebene erstreckende Schwenkbolzen (126, 127) verdrehbar gelagert. Die nach unten zeigenden Arme (128, 129) der Antriebshebel (124, 125) werden zum Verschwenken in den Richtungen der Pfeile O, P gespreizt, und zwar gegen die Wirkung einer hier nicht näher dargestellten, die unteren Arme (128, 129) zusammenziehenden Feder. Zum Spreizen der unteren Arme (128, 129) wird ein Druckrollenpaar verwendet, wie dies im Prinzip in der DE-OS 34 23 283 beschrieben ist.Two drive levers (124, 125) are mounted on the frame part (122) as a mirror image of the longitudinal axis (123) so that they can rotate about pivot bolts (126, 127) extending perpendicular to the plane of the drawing. The downward-pointing arms (128, 129) of the drive levers (124, 125) are spread out for pivoting in the directions of the arrows O, P, against the action of a lower arm (128, 129) which does not show here in detail Feather. A pair of pressure rollers is used to spread the lower arms (128, 129), as is described in principle in DE-OS 34 23 283.

An den von den Schwenkbolzen (126, 127) nach oben sich erstreckenden Armen (130̸, 131) sind spiegelbildlich Preßbackenträger (132, 133) angelenkt, und zwar über Schwenkbolzen (134, 135), die sich senkrecht zur Zeichnungsebene erstrecken. Diese Preßbackenträger (132, 133) sind mittig zu Preßbacken (136, 137) ausgeformt. Jeweils seitlich davon weisen die Preßbackenträger (132, 133) V-förmig sich erstreckende, ebene Führungsflächen (138, 139, 140̸, 141) auf, wobei sich die V-Winkel zueinander öffnen. An diesen Führungsflächen (138, 139, 140̸, 141) liegen weitere Preßbacken (142, 143, 144, 145) an. Über sich an den Preßbackenträgern (132, 133) abstützende Druckfedern (146, 147, 148, 149) werden die Preßbacken (142, 143, 144, 145) jeweils nach außen gedrückt und liegen vor dem Verpressen an Anschlägen (150̸, 151, 152, 153) an. Im übrigen sind die Führungsflächen (138, 139, 140̸, 141) und die an ihr anliegenden Flächen der Preßbacken (142, 143, 144, 145) so ausgebildet, daß letztere bei geöffnetem Preßwerkzeug (121) nicht herausfallen können.Press jaw supports (132, 133) are hinged to the arms (130, 131) which extend upwards from the pivot pins (126, 127), specifically via pivot pins (134, 135) which extend perpendicular to the plane of the drawing. These press jaw supports (132, 133) are formed in the center to form press jaws (136, 137). On each side of it, the press jaw supports (132, 133) have flat guide surfaces (138, 139, 140̸, 141) which extend in a V-shape, the V-angles opening towards one another. On these guide surfaces (138, 139, 140̸, 141) there are further press jaws (142, 143, 144, 145). The compression jaws (142, 143, 144, 145) are each pressed outwards by means of compression springs (146, 147, 148, 149) which support the compression jaw supports (132, 133) and lie on stops (150̸, 151, 152 , 153). For the rest, the guide surfaces (138, 139, 140 141, 141) and the surfaces of the press jaws (142, 143, 144, 145) that are adjacent to them are designed such that the latter cannot fall out when the press tool (121) is open.

Für den Gebrauch dieses Preßwerkzeuges (121) werden zunächst die unteren Arme (128, 129) der Antriebshebel (124, 125) von Hand zusammengedrückt, also entgegen den Pfeilen O, P. Hierdurch öffnen sich die oberen Arme (130̸, 131) maulartig und geben einen Raum frei, so daß das Preßwerkzeug (121) über eine Kupplungshülse (154), die über ein Rohrende (155) gestülpt ist, quer zu deren Längsachse geschoben werden kann. Dabei können die Preßbackenträger (132, 133) - was hier nicht gezeigt ist - durch Kulissen, wie sie zu dem Preßwerkzeug gemäß der DE-OS 34 23 283 beschrieben sind, derart geführt sein, daß sie sich zunächst achsparallel auseinanderbewegen und dann durch eine Schwenkbewegung nash oben hin öffnen.To use this pressing tool (121), the lower arms (128, 129) of the drive lever (124, 125) are first pressed together by hand, that is, contrary to the arrows O, P. As a result, the upper arms (130̸, 131) open mouth-like and free up a space so that the pressing tool (121) can be pushed transversely to its longitudinal axis via a coupling sleeve (154), which is put over a pipe end (155). The pressing jaw carriers (132, 133) - which is not shown here - can be guided through scenes such as those described for the pressing tool according to DE-OS 34 23 283 in such a way that they first move apart axially parallel and then by a pivoting movement nash open at the top.

Nach dem Überschieben über die Kupplungshülse (154) werden die Preßbackenträger (132, 133) durch Spreizen der unteren Arme (128, 129) mit Hilfe der hier nicht dargestellten Antriebseinrichtung geschlossen. Die Preßbacken (136, 137, 142, 143, 144, 145) kommen dann an dem Mantel der Kupplungshülse (154) zur Anlage, und zwar nur mit ihren jeweils äußeren Querkanten. Die Anschläge (150̸, 151, 152, 153) sind so angeordnet, daß zwischen den sechs Preßbacken (136, 137, 142, 143, 144, 145) Spalte (156, 157, 158, 159, 160̸, 161) verbleiben, die im wesentlichen gleich groß sind.After being pushed over the coupling sleeve (154), the press jaw supports (132, 133) are closed by spreading the lower arms (128, 129) with the aid of the drive device, not shown here. The press jaws (136, 137, 142, 143, 144, 145) then come to rest on the jacket of the coupling sleeve (154), and only with their respective outer transverse edges. The stops (150̸, 151, 152, 153) are arranged so that between the six press jaws (136, 137, 142, 143, 144, 145) gaps (156, 157, 158, 159, 160̸, 161) remain are essentially the same size.

Durch weitere Druckbeaufschlagung der Antriebseinrichtung werden die unteren Arme (128, 129) der Antriebshebel (124, 125) zusätzlich gespreizt. Dies hat zur Folge, daß sich die Preßbackenträger (132, 133) weiter aufeinanderzu bewegen, und zwar im wesentlichen achsparallel. Gleichzeitig verschieben sich die oberen und unteren Preßbacken (142, 143, 144, 145) auf ihren Führungsbahnen (138, 139, 140̸, 141) derart gegen die Wirkung der Druckfedern (146, 147, 148, 149), daß die Spalte (156, 157, 158, 159, 160̸) während des gesamten Preßvorgangs im wesentlichen gleich bleiben. Schließlich kommen die Stirnflächen der Preßbacken (136, 137, 142, 143, 144, 145) am Preßende gegenseitig zur Anlage. Dieser Zustand ist in Figur (10̸) zu sehen, wobei in dieser Figur die Antriebshebel (124, 125) und das Rahmenteil (122) aus Vereinfachungsgründen weggelassen sind. Die Kupplungshülse (154) und das Rohrende (155) sind dann fertiggestaucht.By further pressurization of the drive device, the lower arms (128, 129) of the drive lever (124, 125) are additionally spread. As a result, the Press jaw carriers (132, 133) move further towards each other, essentially axially parallel. At the same time, the upper and lower press jaws (142, 143, 144, 145) move on their guideways (138, 139, 140̸, 141) against the action of the compression springs (146, 147, 148, 149) such that the gaps (156 , 157, 158, 159, 160̸) remain substantially the same throughout the pressing process. Finally, the end faces of the press jaws (136, 137, 142, 143, 144, 145) come to rest against each other at the end of the press. This state can be seen in FIG. (10̸), the drive levers (124, 125) and the frame part (122) being omitted in this figure for reasons of simplification. The coupling sleeve (154) and the pipe end (155) are then fully compressed.

In den Figuren (3) und (4) ist eine Modifikation des Preßwerkzeuges (121) gemäß den Figuren (1) und (2) dargestellt, wobei der einzige wesentliche Unterschied darin besteht, daß statt sechs nur vier Preßbacken vorhanden sind.In Figures (3) and (4) a modification of the pressing tool (121) according to Figures (1) and (2) is shown, the only essential difference being that instead of six there are only four pressing jaws.

Bei der Darstellung dieses Preßwerkzeuges (171) sind die Antriebseinrichtung, das Werkzeuggehäuse und die Antriebshebel weggelassen. Zu sehen sind zwei Preßbackenträger (172, 173), die in gleicher Weise wie bei dem Ausführungsbeispiel gemaß den Figuren (1) und (2) gegeneinander bewegbar sind. Über Schwenkbolzen (174, 175) sind sie an nicht dargestellte Antriebshebel angelenkt. Sie weisen V-förmige Führungsflächen (176, 177, 178, 179) auf, an denen Preßbacken (180̸, 181, 182, 183) anliegen, und zwar jeweils zwei Preßbacken (180̸, 181) bzw. (182, 183) pro Preßbackenträger (172, 173). Zwischen den beiden Preßbacken (180̸, 181, 182, 183) jedes Preßbackenträgers (172, 173) ist jeweils eine Druckfeder (184, 185) angeordnet, die bestrebt sind, die Preßbacken (180̸, 181) bzw. (182, 183) auseinanderzudrücken, d. h. nach außen zu schieben. Der Bewegungsbereich der Preßbacken (180̸, 181, 182, 183) wird durch über die Führungsflächen (176, 177, 178, 179) vorstehende Begrenzungsstifte (186, 187, 188, 189) limitiert, welche in Ausnehmungen (190̸, 191, 192, 193) in den Rückseiten der Preßbacken (180̸, 181, 182, 183) einfassen. Die Begrenzungsstifte (186, 187, 188, 189) sind so angeordnet und die Ausnehmungen (190̸, 191, 192, 193) so bemessen, daß sich zwischen den Stirnseiten der Preßbacken (180̸, 181, 182, 183) bei Anlage an einer Kupplungshülse, die über ein Rohrende (195) gstülpt ist, gleich große Spalte (196, 197, 198, 199) bilden.In the representation of this pressing tool (171), the drive device, the tool housing and the drive lever are omitted. You can see two press jaw supports (172, 173), which can be moved against each other in the same way as in the exemplary embodiment according to FIGS. (1) and (2). They are articulated to drive levers, not shown, via pivot bolts (174, 175). They have V-shaped guide surfaces (176, 177, 178, 179) on which pressing jaws (180̸, 181, 182, 183) are in contact, namely two pressing jaws (180̸, 181) or (182, 183) per pressing jaw carrier (172, 173). Between the two pressing jaws (180̸, 181, 182, 183) of each pressing jaw support (172, 173) a compression spring (184, 185) is arranged, which strives to press the pressing jaws (180̸, 181) or (182, 183) apart , ie to push outwards. The range of motion of the pressing jaws (180̸, 181, 182, 183) is limited by the limiting pins (186, 187, 188, 189) protruding from the guide surfaces (176, 177, 178, 179), which are shown in Hold recesses (190̸, 191, 192, 193) in the back of the press jaws (180̸, 181, 182, 183). The limiting pins (186, 187, 188, 189) are arranged and the recesses (190̸, 191, 192, 193) are dimensioned such that there is between the end faces of the press jaws (180̸, 181, 182, 183) when they are in contact with a coupling sleeve , which is slipped over a pipe end (195), form equally large gaps (196, 197, 198, 199).

Im übrigen gestaltet sich der Preßvorgang genau so wie mit dem Preßwerkzeug (121) gemäß den Figuren (1) und (2). Die Preßbackenträger (172, 173) werden aufeinanderzu bewegt, wobei sich die Preßbacken (180̸, 181, 182, 183) auf den Führungsflächen (176, 177, 178, 179) nach innen bewegen, bis sie mit ihren Stirnflächen zur Anlage kommen. Diese Situation ist in Figur (4) zu sehen.Otherwise, the pressing process is exactly the same as with the pressing tool (121) according to Figures (1) and (2). The pressing jaw carriers (172, 173) are moved towards each other, the pressing jaws (180 181, 181, 182, 183) moving inwards on the guide surfaces (176, 177, 178, 179) until they come to rest with their end faces. This situation can be seen in Figure (4).

Claims (7)

  1. Press tool (121; 171), particularly for connecting tubular workpieces, having at least two actuating levers (124, 125) movable relatively to each other so that the press tool (121; 171) can be opened mouth-like to apply it to the workpiece (154, 155; 194, 195) and can be closed in the region of its compression end into a closed compression space, each of the actuating levers (124, 125) having compression jaws (142 to 145; 180 to 183) and at least one of the actuating levers (124, 125) having two compression jaws (142 to 145; 180 to 183) associated with them that are guided on guideways (138 to 141; 176 to 179) respectively enclosing an angle which in the closed state of the compression space is symmetrical with respect to its centre point and opens out with respect to that centre point, characterized in that each actuating lever (124, 125) has a compression jaw carrier (132, 133; 172, 173) swivellably coupled to it, on which the compression jaws (142 to 145; 180 to 183) are seated and that the actuating levers (124, 125) are acted upon by at least one actuating arrangement.
  2. Press tool according to claim 1,
    characterized in that the compression jaws (142 to 145; 180 to 185) are guided movably relative to each other such that their respective neighbouring opposed end surfaces are evenly spaced apart when compression begins.
  3. Press tool according to claim 1 or 2,
    characterized in that the compression jaws (136, 137, 142 to 145, 180 to 183) are formed of equal length.
  4. Press tool according to one of claims 1 to 3,
    characterised in that two compression jaw carriers (132, 133; 172, 173) directed towards each other are each provided with two movable compression jaws (142 to 145; 180 to 183).
  5. Press tool according to one of claims 1 to 4,
    characterized in that an immovably held compression jaw (136, 137) is provided on the compression jaw carrier(s) (132, 133) between the respective movable compression jaws (142 to 145).
  6. Press tool according to one of claims 1 to 5,
    characterized in that the movable compression jaws (142 to 145; 180 to 183) are each spring loaded against an abutment (150 to 153; 186 to 189) in the direction of opening of the angle of the slide ways.
  7. Press tool according to one of claims 1 to 6,
    characterized in that the guide arrangements for the compression jaws (142 to 145; 180 to 183) which are movably held in the compression jaw carriers (132, 133; 172, 173) are formed as straight guideways (138 to 141; 176 to 179) extending in V-shape.
EP91105663A 1990-04-12 1991-04-10 Press tool Expired - Lifetime EP0452791B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011822 1990-04-12
DE4011822 1990-04-12

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EP0452791A1 EP0452791A1 (en) 1991-10-23
EP0452791B1 true EP0452791B1 (en) 1994-09-14

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

Country Status (8)

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US (1) US5148698A (en)
EP (4) EP0452791B1 (en)
JP (2) JP3334892B2 (en)
AT (4) ATE175599T1 (en)
CA (2) CA2040277C (en)
DE (5) DE9007414U1 (en)
DK (4) DK0628362T3 (en)
ES (4) ES2067077T3 (en)

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Also Published As

Publication number Publication date
DK0451806T3 (en) 1995-05-22
EP0628362B1 (en) 1998-06-17
DK0627273T3 (en) 1999-09-06
EP0627273A3 (en) 1995-06-14
EP0451806A1 (en) 1991-10-16
JPH0768329A (en) 1995-03-14
ATE111385T1 (en) 1994-09-15
CA2040277C (en) 2001-12-04
CA2040277A1 (en) 1991-10-13
CA2040278A1 (en) 1991-10-13
EP0451806B1 (en) 1995-01-11
US5148698A (en) 1992-09-22
DE59109014D1 (en) 1998-07-23
EP0452791A1 (en) 1991-10-23
ES2062596T3 (en) 1994-12-16
DE59109090D1 (en) 1999-02-25
JP3334892B2 (en) 2002-10-15
ES2129089T3 (en) 1999-06-01
DE59104196D1 (en) 1995-02-23
EP0627273A2 (en) 1994-12-07
ATE175599T1 (en) 1999-01-15
EP0627273B1 (en) 1999-01-13
DE59102895D1 (en) 1994-10-20
EP0628362A2 (en) 1994-12-14
DK0452791T3 (en) 1994-12-12
ATE116880T1 (en) 1995-01-15
JPH0768330A (en) 1995-03-14
ES2119935T3 (en) 1998-10-16
EP0628362A3 (en) 1995-06-14
DK0628362T3 (en) 1999-04-06
ATE167414T1 (en) 1998-07-15
DE9007414U1 (en) 1991-07-18
DE59109090C5 (en) 2011-01-05
ES2067077T3 (en) 1995-03-16
CA2040278C (en) 2001-10-02

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