EP0771615A1 - Appareil de sertissage pour sertissage radial de connexions de tubes - Google Patents

Appareil de sertissage pour sertissage radial de connexions de tubes Download PDF

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Publication number
EP0771615A1
EP0771615A1 EP96116900A EP96116900A EP0771615A1 EP 0771615 A1 EP0771615 A1 EP 0771615A1 EP 96116900 A EP96116900 A EP 96116900A EP 96116900 A EP96116900 A EP 96116900A EP 0771615 A1 EP0771615 A1 EP 0771615A1
Authority
EP
European Patent Office
Prior art keywords
base jaws
jaw inserts
jaw
press device
sliding
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.)
Ceased
Application number
EP96116900A
Other languages
German (de)
English (en)
Inventor
Jürgen Fuhr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rothenberger Werkzeuge AG
Original Assignee
Rothenberger Werkzeuge AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19543312A external-priority patent/DE19543312C2/de
Application filed by Rothenberger Werkzeuge AG filed Critical Rothenberger Werkzeuge AG
Publication of EP0771615A1 publication Critical patent/EP0771615A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/02—Jaws
    • B25B7/04—Jaws adjustable

Definitions

  • the invention relates to a pressing device for the radial pressing of line connectors, which have an axis (AA), with two mutually movable pliers-shaped base jaws surrounding a pliers jaw, which are designed as lever arms and have recesses in which on both sides of an uninterrupted dividing joint are secured in a semi-ring-shaped manner against rotation , interchangeable jaw inserts are arranged, the inner surfaces of which are matched to the press profile to be produced on the line connectors.
  • AA axis
  • Such pressing devices are used to connect pipe or hose sections to one another or to fittings.
  • a metal sleeve with the interposition of two sealing rings can be pressed onto the ends of two pipelines, as described in DE-OS 27 25 280.
  • Another possibility is to push one end of the line into the widened end of a second line and to press the widened end against the internal pipeline, as described in GB-OS 2 205 373.
  • Such press devices usually therefore consist of a drive part, which can be designed as manually operated pliers, as an electric drive or as a hydraulic drive, and which is connected to a so-called press head, which has press jaws with a so-called pliers jaw, which has those work surfaces on the inside, which determine the geometric shape of the press connection.
  • Such press heads are usually replaced as a whole. However, they are very heavy because they are made of steel, and the operator of such a pressing device then has to carry a large weight.
  • two of three jaw inserts on opposite sides are with nose or Provide flange-shaped projections that overlap the base jaws.
  • the projections there are sliding blocks which are guided in arcuate sliding grooves in order to ensure the condition of equal distances between the individual sectors.
  • two of three jaw inserts are guided in sector-shaped grooves in the base jaws, in which they can be rotated relative to one another in the circumferential direction by spring-loaded pins. In both exemplary embodiments, the expansion of the jaw inserts is difficult and is also not provided.
  • the rotational mobility of the jaw inserts is ensured by axially parallel flange projections which engage in complementary annular grooves which are located in sector-shaped guide bodies which are screwed onto the base jaws on the end face.
  • Axial removal of the jaw inserts is possible here, but only after unscrewing the guide bodies and after removing two L-shaped leaf springs that rotate the jaw inserts in their annular bearings. Both the disassembly and the reassembly are difficult and two-time in this case, especially since individual parts can also be lost in this case when converting such a pressing device.
  • This known pressing device is also not provided for retrofitting, so that the so-called press head must be replaced as a whole if different press connections are to be made.
  • a non-generic pressing device with a closed cylindrical housing which at the same time serves as an outer wall for an annularly closed membrane.
  • Six sector-shaped primary and secondary segments are moved through this membrane, for example in order to press line connections.
  • Such a device can only be pushed axially onto a line, which makes it difficult, if not impossible, to process long and / or already laid pipelines.
  • the sectors rest loosely on the membrane and are held in place by a) spreading them by compression springs, b) holding them in the housing by screwed-on end rings and c) engaging these end rings by means of projections.
  • inner or primary segments are each congruently connected to the outer or secondary segments either by a single cylindrical pin, referred to as dowel, or by a dovetail connection.
  • dowel a single cylindrical pin
  • dovetail connection a single cylindrical pin
  • additional pressure springs distributed over the circumference are required to prevent uncontrolled movements.
  • the inner segments can also only be replaced after dismantling at least one of the end rings, the clamping connection of the membrane also being released.
  • Additional cylinder pins which are arranged in the gaps between the inner segments, only serve to center the segments during the closing movement, because the membrane does not give the segments sufficient support.
  • the entire arrangement is extremely complex to manufacture because of the large number of parts, because numerous machining processes have to be carried out and many tolerances have to be observed. Disassembly on a construction site is also problematic because parts can easily be lost.
  • the invention is therefore based on the object of specifying a pressing device of the type described at the outset, which is distinguished by the simplest manufacture, robust construction and easy replacement of the jaw inserts without the use of tools and screw connections.
  • the object is achieved in the pressing device specified at the outset according to the invention in that between the pincer-shaped base jaws on the one hand and the half-ring-shaped jaw inserts on the other hand, at least two sliding bodies are used per jaw insert, the sliding surfaces of which run parallel to the axis AA and each with a part of their cross section protrude into the pincer-shaped base jaws and with another part of their cross-section into the jaw inserts such that the jaw inserts can be pushed out and in along the sliding bodies from the base jaws.
  • the use of the sliding bodies ensures that the semi-cylindrical inner surfaces of the base jaws, which together form a full cylinder surface, and the semi-cylindrical outer surfaces of the jaw inserts, which together also form a full cylinder surface form, can be machined with rotary tolerances while maintaining close tolerances.
  • the sliding bodies are only used during final assembly and are expediently connected to the base jaws, for example by gluing, pinning, screwing or caulking. The sliding bodies then serve as parallel guides for, for example, axially pushing the jaw inserts out of the base jaws.
  • the sliding bodies are selected from the group of disc springs, insert keys, sliding springs or cylindrical pins and engage in essentially complementary recesses in the base jaws on the one hand and in the jaw inserts on the other.
  • the axes of four sliding bodies lie in the area of the corner points of a rectangle, the longest edges of which run parallel to the dividing joint and whose diagonals intersect in the axis A-A. In this way a tilt-free guidance of the jaw inserts in the recesses of the base jaws is guaranteed.
  • latching elements of known design are used in a particularly advantageous manner, which can consist of latching balls and compression springs.
  • latching balls for this purpose, there are recesses on the circumference of the jaw inserts into which the locking balls can engage.
  • FIGS. 1 to 8 Three exemplary embodiments of the subject matter of the invention are explained in more detail below with reference to FIGS. 1 to 8.
  • a press head 1 is shown in FIGS. 1 and 2, which has two base jaws 2 and 3, in each of which a recess 4 and 5, which is delimited by a semi-cylindrical inner surface, is arranged.
  • the entire arrangement is mirror-symmetrical to a plane of symmetry E- in which there is also an interrupted dividing line 6 between the base jaws.
  • the base jaws 2 and 3 are of identical design and each have a first lever arm 7 or 8, in which the recess 4 or 5 is arranged, and a second lever arm 9 or 10, on the inside of which control surfaces 9a and 10a are arranged which form so-called "inclined planes" with respect to the plane of symmetry E.
  • the two control surfaces 9a and 10a cooperate with a drive device, of which only the two control rollers 11 and 12 are shown here, which are supported on the control surfaces and against one another. By moving the control rollers 11 and 12 from left to right, the press head 1 is brought into the closed position shown.
  • the axial displacement of the control rollers 11 and 12 can be mechanical, electrical, hydraulic or electro-hydraulic happen.
  • the corresponding drive unit is not shown for the sake of simplicity and is otherwise known.
  • the press head is placed on the pipeline to be pressed in that the operator presses the two lever arms 9 and 10 together, which is of course only possible if the control rollers 11 and 12 are in the retracted position.
  • the division joint 6 or the "press jaw” is opened correspondingly wide, and after release a compression spring 13 pivots the two base jaws 2 and 3 as far as the initial diameter of the line connector to be pressed (fittings) allows.
  • the two lever arms 9 and 10 are at a significantly smaller distance from one another than is shown in FIG. 1.
  • the dividing joint 6 is now brought to close and the pressing process is carried out until the base jaws 2 and 3 assume the position according to FIG. 1.
  • the lever arms 7/9 and 8/10 are formed with respect to pivot pins 14 and 15, which are held between two T-shaped plates 16.
  • the base jaws 2 and 3 are mounted on these pivot pins 14 and 15 by means of bearings 17 and 18.
  • the press head 1 is fastened to a correspondingly designed drive unit by passing a connecting pin through holes 19 in the two T-shaped plates 16, which engages in a corresponding hole in the drive unit.
  • a jaw insert 20 or 21 is inserted, the joint of which corresponds to the joint 6 of the base jaws 2 and 3.
  • the inner surfaces 22 and 23 of the jaw inserts 20 and 21 are the so-called work surfaces. In the illustrated embodiment In the external view, the inner surfaces 22 and 23 complement one another to form a polygon with six rounded "corners".
  • the sliding bodies 24 are designed as disc springs 24a and are held in recesses which extend partly into the base jaws 2 and 3 and partly into the jaw inserts 20, 21.
  • the part-cylindrical parts of the disc springs 24a are located in part-cylindrical grooves 25, which have been produced by a disc milling cutter in the base jaws 2 and 3.
  • the sliding surfaces are those surface parts of the sliding body 24 which protrude from the base jaws 2 and 3 and each form two edges which run parallel to the axis A-A. This definition also applies to the differently designed sliding bodies 24 according to FIGS. 4 and 5.
  • the two circular segment surfaces of the disc springs or the center of symmetry in between run parallel to the division joint 6.
  • the base jaws 2 and 3 and the jaw inserts 20 and 21 are drilled through and aligned connected by pins or clamping sleeves 31 with a diameter of 1.5 mm driven into the bores.
  • Each jaw insert 20, 21 is held by two sliding bodies 24 arranged in the vicinity of the dividing joint 6.
  • a locking element 26 which consists in a known manner of a locking ball 27 and a compression spring 28, the are mounted in an unspecified, radial to the axis A, bore.
  • the opposing jaw insert 21 is held by a locking element of the same type, which is diametrically opposed to the locking element 26 shown.
  • Figure 3 shows - on an enlarged scale - a jaw insert 20, the semi-cylindrical outer surface 29 of course match the dimensions of the associated recess 4 or 5, so that the jaw inserts according to Figures 1 and 2 on the one hand and according to Figure 3 on the other hand are interchangeable.
  • the outer surface 29 two prismatic and axially parallel grooves 25a are arranged, in which the sliding surfaces of the disc springs 24a engage.
  • the inner surface 22 of the jaw insert 20 shown in FIG. 3 is, however, significantly larger in cross section, so that line connectors with a larger cross section can be pressed in with the jaw insert according to FIG.
  • the exemplary embodiment according to FIGS. 4 and 5 differs from that according to FIGS. 1 to 3 in that, instead of the partially cylindrical disc springs 24a, largely prismatic parallel keys 24b with a rectangular cross section are used, in which the largest planes of symmetry "S" are aligned with the axis AA, at an angle of 30 °. If parallel keys with rounded (semi-cylindrical) ends are used, the axis of curvature is tangential to the outer surface 29, so that the jaw inserts 20 and 21 can be easily threaded.
  • the sliding bodies 24 are designed as cylindrical pins 24c and in bores 25c held, which are parallel to the axis AA partly in the base jaws 2 and 3, partly in the jaw inserts 20 and 21.
  • the axis A or AA shown in FIGS. 1 to 8 is the system axis, which, however, corresponds to the axis of the line connector to be processed.
  • each jaw insert 20 or 21 is held or guided by two sliding bodies 24.
  • the axes of four sliding bodies 24 lie on the corner points of a rectangle R, which is shown here in broken lines.
  • the longest edges K1 and K2 run parallel to the division joint 6.
  • the corresponding diagonals D1 and D2 of the same rectangle intersect in the axes A and A-A, respectively.
  • This basic arrangement also applies to the exemplary embodiment according to FIGS. 4 and 5.
  • Figure 7 shows - on an enlarged scale - a jaw insert 20, the semi-cylindrical outer surface 29 of course corresponds to the dimensions of the associated recess 4 or 5 in Figure 6, so that the jaw inserts according to Figure 6 on the one hand and according to Figure 7 on the other hand are interchangeable.
  • the position of the bores 25c also corresponds, some of which are only shown in broken lines in FIG. Only the partial circumference 25d of the bores 25c, which is located within the contour of the jaw insert 20 and likewise forms a groove, is shown in solid lines.
  • the inner surface 22 of the jaw insert 20 shown in FIG. 7 is also significantly larger in cross section here, so that line connectors with a larger cross section can be pressed with the jaw insert according to FIG.
  • the radial section according to FIG. 8 also represents the jaw inserts according to FIGS. 3 and 5.
  • FIG. 8 also shows that the inner surfaces 22 of the jaw insert 20 are only arranged on the inner circumference of so-called ribs, while the space between these ribs can be designed quite differently, as can be seen from FIG.
  • the geometric shape of the inner surfaces 22 and 23 is predetermined by the nature of the line connector or by the processing guidelines of the manufacturer of these line connections and is not of further importance for the subject matter of the invention.
  • the cylindrical outer surface 29 of each jaw insert 20 or 21 there is also a recess 30 for the engagement of the detent ball 27 according to FIGS. 1, 4 and 6.
  • both the semi-cylindrical boundary surfaces of the recesses 4 and 5 and the semi-cylindrical outer surfaces 29 of the base jaws 2 and 3 on the one hand and the jaw inserts 20 and 21 on the other hand can be machined precisely before final assembly, since the sliding bodies 24 are not present at the time of machining are.
  • This allows very precise pairings or fits to be produced, so that the enormous pressing forces can be transferred from the pipeline to the jaw inserts 20 and 21 and from these to the base jaws 2 and 3 without any canting, displacements or the like being observed.
  • the inner surfaces 22 and 23 represent a closed curve during the pressing process, ie there are no corners, tips or projections, as would occur if the two jaw inserts were displaced relative to one another. Nevertheless, the two jaw inserts 20 and 21 can be relatively easily pressed out of the recesses 4 and 5 in the direction of the axis AA and replaced by other jaw inserts, which are then fixed again in the exact spatial position by the latching element 26 which engages in the recess 30 .
  • the entire arrangement has, apart from the jaw inserts 20 and 21 to be exchanged, no moving parts or parts which are required during the exchange could get lost. The entire arrangement is very easy to manufacture on modern machining centers.
  • the invention is not limited to pivotable base jaws, but can also be used with the same advantage for press heads with base jaws which can be displaced relative to one another by a parallel guide.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
EP96116900A 1995-11-03 1996-10-21 Appareil de sertissage pour sertissage radial de connexions de tubes Ceased EP0771615A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19540974 1995-11-03
DE19540974 1995-11-03
DE19543312A DE19543312C2 (de) 1995-11-03 1995-11-21 Preßvorrichtung zum radialen Verpressen von Leitungsverbindern
DE19543312 1995-11-21

Publications (1)

Publication Number Publication Date
EP0771615A1 true EP0771615A1 (fr) 1997-05-07

Family

ID=26020043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116900A Ceased EP0771615A1 (fr) 1995-11-03 1996-10-21 Appareil de sertissage pour sertissage radial de connexions de tubes

Country Status (1)

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EP (1) EP0771615A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924087A1 (de) * 1999-05-26 2000-12-07 Wezag Gmbh Zange zum Verpressen von Fassungen, Rohren, Kabelschuhen und dgl.
US7553268B2 (en) * 2003-04-04 2009-06-30 Op S.R.L. Tool holding clamp for radial presses
EP3100827A1 (fr) * 2015-06-02 2016-12-07 Geberit International AG Système de levier de presse doté d'un levier de presse et d'une mâchoire de presse
EP3162457A1 (fr) * 2015-11-02 2017-05-03 Fibro GmbH Presse à main
CN111456158A (zh) * 2020-04-17 2020-07-28 杭州操订科技有限公司 一种能够防止加水管晃动的储水罐配件

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE325016C (de) * 1919-11-30 1920-09-08 David Mitchell Hutchinson Aus Haelften bestehendes Lager
US2550963A (en) * 1950-03-03 1951-05-01 James R Brinkley Multiple-pivoted-jaw pipe wrench with interchangeable object-embracing bushings
US2637236A (en) * 1952-03-19 1953-05-05 Somerset Machine & Tool Co Inc Liner for the jaw faces of pipe wrenches
US3084003A (en) * 1961-04-07 1963-04-02 Thompson Ramo Wooldridge Inc Press fitted sleeves
DE1907956A1 (de) 1968-02-19 1969-10-16 Duffield Frederick Russell Werkzeug zum Festhalten und/oder Bearbeiten von Werkstuecken
DE2725280A1 (de) 1977-06-01 1978-12-14 Mannesmann Roehren Werke Ag Rohrverbindung fuer leitungsrohre
DE3247073C1 (de) * 1982-12-20 1984-05-03 Friedrich-Günther 1000 Berlin Laux Preßzange
GB2205373A (en) 1987-05-23 1988-12-07 Mie Horo Co Ltd Method of making piping joints and joining tool
EP0451806A1 (fr) 1990-04-12 1991-10-16 Helmut Dipl.-Ing. Dischler Outil de pressage
EP0504490A1 (fr) 1991-03-18 1992-09-23 Hewing GmbH Pince à sertir pour sertir des connections de tubes

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE325016C (de) * 1919-11-30 1920-09-08 David Mitchell Hutchinson Aus Haelften bestehendes Lager
US2550963A (en) * 1950-03-03 1951-05-01 James R Brinkley Multiple-pivoted-jaw pipe wrench with interchangeable object-embracing bushings
US2637236A (en) * 1952-03-19 1953-05-05 Somerset Machine & Tool Co Inc Liner for the jaw faces of pipe wrenches
US3084003A (en) * 1961-04-07 1963-04-02 Thompson Ramo Wooldridge Inc Press fitted sleeves
DE1907956A1 (de) 1968-02-19 1969-10-16 Duffield Frederick Russell Werkzeug zum Festhalten und/oder Bearbeiten von Werkstuecken
DE2725280A1 (de) 1977-06-01 1978-12-14 Mannesmann Roehren Werke Ag Rohrverbindung fuer leitungsrohre
DE3247073C1 (de) * 1982-12-20 1984-05-03 Friedrich-Günther 1000 Berlin Laux Preßzange
GB2205373A (en) 1987-05-23 1988-12-07 Mie Horo Co Ltd Method of making piping joints and joining tool
EP0451806A1 (fr) 1990-04-12 1991-10-16 Helmut Dipl.-Ing. Dischler Outil de pressage
EP0504490A1 (fr) 1991-03-18 1992-09-23 Hewing GmbH Pince à sertir pour sertir des connections de tubes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924087A1 (de) * 1999-05-26 2000-12-07 Wezag Gmbh Zange zum Verpressen von Fassungen, Rohren, Kabelschuhen und dgl.
US6289712B1 (en) 1999-05-26 2001-09-18 Wezag Gmbh Werkzeugfabrik Pliers for crimping work pieces
DE19924087C2 (de) * 1999-05-26 2002-06-20 Wezag Gmbh Zange zum Verpressen von Fassungen, Rohren, Kabelschuhen und dgl.
US7553268B2 (en) * 2003-04-04 2009-06-30 Op S.R.L. Tool holding clamp for radial presses
EP3100827A1 (fr) * 2015-06-02 2016-12-07 Geberit International AG Système de levier de presse doté d'un levier de presse et d'une mâchoire de presse
EP3162457A1 (fr) * 2015-11-02 2017-05-03 Fibro GmbH Presse à main
CN111456158A (zh) * 2020-04-17 2020-07-28 杭州操订科技有限公司 一种能够防止加水管晃动的储水罐配件

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