EP2286936B1 - Outil de presse - Google Patents

Outil de presse Download PDF

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Publication number
EP2286936B1
EP2286936B1 EP20090405134 EP09405134A EP2286936B1 EP 2286936 B1 EP2286936 B1 EP 2286936B1 EP 20090405134 EP20090405134 EP 20090405134 EP 09405134 A EP09405134 A EP 09405134A EP 2286936 B1 EP2286936 B1 EP 2286936B1
Authority
EP
European Patent Office
Prior art keywords
pressing
pressing tool
force
tool according
clamping
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.)
Active
Application number
EP20090405134
Other languages
German (de)
English (en)
Other versions
EP2286936A1 (fr
Inventor
Ernst Heimgartner
Daniel LÜSCHER
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.)
Geberit International AG
Original Assignee
Geberit International 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
Application filed by Geberit International AG filed Critical Geberit International AG
Priority to EP20090405134 priority Critical patent/EP2286936B1/fr
Publication of EP2286936A1 publication Critical patent/EP2286936A1/fr
Application granted granted Critical
Publication of EP2286936B1 publication Critical patent/EP2286936B1/fr
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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
    • B21D39/046—Connecting tubes to tube-like fittings
    • 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

Definitions

  • the invention relates to a pressing tool with two oppositely mounted on a bearing part two-armed pressing levers, each having a jaw with an engagement portion for processing an article and a press to be connected to a pressing device pressing arm, wherein the Sp Sonarm has an inlet curve for a roll of the pressing device, according to the preamble of claim 1.
  • Such pressing tools have long been used in particular for the manufacture of pipe joints, in particular joints of composite pipes with fittings.
  • the pressing tool is coupled with a pressing device, which can be designed as a hydraulic drive.
  • a hand-operated pressing device is also conceivable.
  • such a pressing tool for example, from CH-A-687 368 have become known to the applicant.
  • the US 6,035,775 discloses a pressing tool having two spreading arms, each having an inlet curve for a roll of a pressing device.
  • the inlet curves converge in the direction of the pressing jaws and each ends with an inward bending.
  • the bends at the ends of the inlet curves are positioned so far back that the rollers can not be reached without undesirable deformation of the spreader arms and the jaws. Until these bends were reached only approximately, the spreader arms would be further spread after closing the jaws and would be overburdened.
  • the document therefore offers the expert no indication of the solution to the problem of how the life could be extended and the safety of such a device could be improved.
  • the power of the baking drive is controlled such that the pressing jaws at least towards the pressing end have a lower kinetic energy than without power control.
  • the jaw drive is switched off at the latest when reaching the final press position.
  • a pickup is provided, which is arranged in the region of the opposite end faces of two adjacent pressing jaws.
  • Such controls are relatively expensive.
  • the spreading arms are formed as usual.
  • the EP-B-1 397 231 discloses an electrically operated pressing tool having a spindle driven by an electric motor, which is in operative connection with a clamping pliers. On a housing, a force or pressure sensor is arranged, which emits a switching signal to the control of the motor upon reaching a predetermined desired value of the clamping force. Spreader arms and rollers for closing the jaws are not provided in this press tool.
  • the DE-U-20 2008 006 851 discloses a pressing apparatus having actuating rollers for closing pressing jaws. It is provided a mark on which is visually determined whether the final press position is reached or not. A visual check of the final press position is indeed easy to implement, but requires the reliable attention of the operator.
  • the cams have a portion with mutually parallel surfaces in which no force is transmitted to the actuating legs by the tensile force of the spreader rollers, whereby the spread remains constant when the spreader rollers run along these parallel surfaces.
  • the invention is based on the object to provide a pressing tool of the type mentioned, which is safer and also has a longer life.
  • the clamping force is thus limited.
  • This limitation causes after the closing of the jaws, the spreading arms can not be spread substantially. This avoids breakage on the jaws. Since the jaws are not overloaded excessively, the service life can be significantly extended.
  • the clamping force limiting means is designed as a stop on which the corresponding roller is present after passing through the inlet curve. It may be such a stop on a pressing lever or it can be arranged on each of the two pressing lever such a stop. Preferably, these stops are arranged symmetrically to a center line of the pressing tool. After closing the pressing tool both rollers of the pressing device are each at a stop. The spreading arms are then essentially not spread further. However, the force of the plunger on the pressing tool is increased even further until the shut-off force is reached. The pressing device is automatically switched off after reaching this shutdown force.
  • the clamping force limiting means are arranged substantially at the end of the inlet curve.
  • the pressing tool can thus be closed with the pressing device as usual. After closing is prevented by the clamping force limiting means that the cheek plates are increasingly loaded.
  • the clamping force limiting means is designed as a cam.
  • This cam forms a Stop for a roll.
  • the cam is preferably formed to project from an inner side of the pressing lever toward a center line.
  • the cam can be made comparatively short, so that the maximum opening angle of the pressing jaws is not significantly reduced.
  • the pressing tool is preferably provided for producing pipe connections.
  • the jaws preferably each have a mouth-like recess which is suitable for receiving a pipe end or a press fitting.
  • the pressing tool according to the invention could, for example, also be designed so that a cutting process or a clamping process can be carried out with it.
  • the clamping force limiting means may alternatively also be arranged on an intermediate jaw.
  • pressing tool 1 has two pressing lever 2, which are arranged symmetrically with respect to a center line 6 and pivotally mounted on a bearing part 7.
  • the pressing levers 2 each have two jaws 3 at a front end and two spreading arms 10 at a rear end.
  • the pressing levers 2 can be pivoted in opposite directions about a pivot axis 8, respectively.
  • the pivoting is done with a known per se pressing device, of which only two rollers 11 are shown here, on a attached to the front end of a pestle.
  • Such pressing devices are known and this is to the above-mentioned CH-A-687 368 directed.
  • the bearing part 7 is connected to pin 9 fixed to the housing of the pressing device.
  • the two rollers 11 are thus moved between the two spreading arms 10 and these are thereby spread.
  • the two rollers 11 slide in this case on the inside of the Spreizarmen 10 arranged inlet curves 12 along.
  • the two jaws 3 are thereby approximated to each other accordingly.
  • This also applies to two surfaces on the inside of the jaws 3 and recesses 4. If, for example, a fitting or pipe end is arranged between the two jaws 3, then the fitting or the pipe end is pressed by the closing jaws 3.
  • the recesses 4 are provided here with corresponding contours.
  • the arrows 14 indicate the forces with which the object to be pressed acts on the jaws 3. The pressing process is complete as soon as the two surfaces 5 arranged on the front side touch each other.
  • the Fig. 2 shows the pressing tool 1 in the closed state. If the two surfaces 5 abut each other, so have the two rollers 11 in Fig. 2 reached shown positions. In these positions, the two rollers 11 are each at a clamping force limiting means 13, which forms a stop for the rollers 11 respectively.
  • These small force limiting means 13 are here designed as cams, which are arranged in each case essentially at the end of the inlet curve 12 and which extend inwards towards the center line 6.
  • the inlet curve 12 may be different depending on the pressing tool and is particularly dependent on opening respectively. Closing angle.
  • the cams or clamping force limiting means 13 can be designed to be comparatively inwardly low, so that they do not essentially limit the opening angle of the pressing tool 1.
  • rollers 11 reaches the respective clamping force limiting means 13, they each act with a force according to the arrow 19 on the corresponding Sp Drard 10. These forces result from a respective force according to arrow 17 and a force according to arrow 18.
  • the parallel to the center line 6 acting Force according to arrow 17 is in each case greater than the spreading causing force according to arrow 18.
  • the curve A ' shows the course of the force on the jaw 3 of the right and inventive press lever 2 according Fig. 3 .
  • the force rises steeply here when reaching the point P1 ', but the increase is comparatively short and then ends.
  • the corresponding force on the jaw 3' initially increases comparatively slightly beyond the point P1 '.
  • the pressing force increases sharply.
  • the increase in the pressing force is significantly greater than in the case of the pressing jaw 3, since no clamping force limiting means is effective here. Due to the steep rise according to the curve B 'is correspondingly the jaw 3' heavily loaded.
  • the load affects not only the jaw 3 ', but also the bearing part 7 and in particular the pivot axis 8 and the corresponding bearing.
  • the two rollers 11 and 11 ' are driven separately for the measurement of these curves.
  • the two rollers 11 and 11 ' are attached to the same plunger.
  • a clamping force limitation is then also achieved when only one of the two pressing lever 2 has a clamping force limiting means 13 and a corresponding stop.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Claims (9)

  1. Outil de presse comprenant deux leviers de presse (2) à deux bras montés de manière à pouvoir pivoter en sens inverse sur une partie de support (7), lesquels présentent chacun une mâchoire (3) avec une région d'engagement (4) pour traiter un objet et un bras d'écartement (10) devant être raccordé à un appareil de presse, le bras d'écartement (10) présentant une courbe d'entrée (12) pour un rouleau (11) de l'appareil de presse, un moyen de limitation de la force de serrage (13) étant disposé sur au moins l'un des deux leviers de presse (2), lesdits moyens de limitation de la force de serrage faisant en sorte que la force appliquée aux mâchoires (3) n'augmente pas davantage après le pressage et que les bras d'écartement ne puissent essentiellement pas s'écarter davantage, caractérisé en ce que le moyen de limitation de la force de serrage (13) est une butée contre laquelle bute le rouleau correspondant (11) après avoir parcouru la courbe d'entrée (12).
  2. Outil de presse selon la revendication 1, caractérisé en ce que le moyen de limitation de la force de serrage (13) est disposé essentiellement à l'extrémité de la courbe d'entrée (12).
  3. Outil de presse selon l'une quelconque des revendications 1 à 2, caractérisé en ce que le moyen de limitation de la force de serrage (13) est réalisé sous forme de came.
  4. Outil de presse selon la revendication 3, caractérisé en ce que la came fait saillie vers un axe médian (6) depuis la courbe d'entrée (12).
  5. Outil de presse selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'un moyen de limitation de la force de serrage (13) est disposé sur chacun des deux leviers de presse (2).
  6. Outil de presse selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est prévu pour fabriquer des raccords de tuyau et les mâchoires (3) présentent chacune un évidement (4) en forme de mors.
  7. Utilisation d'un outil de presse selon la revendication 6, pour l'assemblage de tuyaux composites au moyen d'un raccord.
  8. Utilisation d'un outil de presse selon l'une quelconque des revendications 1 à 6 pour le serrage ou le découpage.
  9. Utilisation d'un outil de presse selon l'une quelconque des revendications 1 à 6 en tant que mâchoire intermédiaire pour un anneau de pressage.
EP20090405134 2009-08-11 2009-08-11 Outil de presse Active EP2286936B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20090405134 EP2286936B1 (fr) 2009-08-11 2009-08-11 Outil de presse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090405134 EP2286936B1 (fr) 2009-08-11 2009-08-11 Outil de presse

Publications (2)

Publication Number Publication Date
EP2286936A1 EP2286936A1 (fr) 2011-02-23
EP2286936B1 true EP2286936B1 (fr) 2014-04-16

Family

ID=41429265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090405134 Active EP2286936B1 (fr) 2009-08-11 2009-08-11 Outil de presse

Country Status (1)

Country Link
EP (1) EP2286936B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489588A (zh) * 2011-12-08 2012-06-13 常州耐尔特精密工具有限公司 工件侧面压力加工机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH687368A5 (de) 1993-06-21 1996-11-29 Geberit Ag Presszange zum Herstellen von Rohrverbindungen.
DE4321249C2 (de) 1993-06-25 1996-05-30 Kirchner Fraenk Rohr Preßzange
DE59705051D1 (de) 1996-08-17 2001-11-29 Novopress Gmbh Verfahren zum Verbinden von Werkstücken sowie Pressgerät hierfür
US6035775A (en) 1997-02-21 2000-03-14 Novopres Gmbh Pressen Und Presswerkzeuge & Co. Kg Pressing device having a control device adapted to control the pressing device in accordance with a servocontrol system of the control device
EP1397231B1 (fr) 2001-06-19 2007-03-21 Von Arx Ag Outil de moulage par compression dote d'une broche destinee a la compression d'elements de couplage
DE20213661U1 (de) 2002-09-02 2002-10-24 Novopress Gmbh Preßwerkzeug für handgeführte Preßgeräte
DE202008006851U1 (de) 2008-05-20 2008-08-07 Schneider, Erwin Klemmelement mit Konusverschraubung
DE202008006831U1 (de) * 2008-05-20 2009-06-25 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Handführbares Pressgerät

Also Published As

Publication number Publication date
EP2286936A1 (fr) 2011-02-23

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