EP0908657A1 - Machine à rétreindre de tuyaux à transmission hydraulique - Google Patents

Machine à rétreindre de tuyaux à transmission hydraulique Download PDF

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Publication number
EP0908657A1
EP0908657A1 EP98118890A EP98118890A EP0908657A1 EP 0908657 A1 EP0908657 A1 EP 0908657A1 EP 98118890 A EP98118890 A EP 98118890A EP 98118890 A EP98118890 A EP 98118890A EP 0908657 A1 EP0908657 A1 EP 0908657A1
Authority
EP
European Patent Office
Prior art keywords
chamber
cylinder
reservoir
rod
conduit
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.)
Granted
Application number
EP98118890A
Other languages
German (de)
English (en)
Other versions
EP0908657B1 (fr
Inventor
Giorgio Vezzani
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.)
Cbc SpA
Original Assignee
Cbc SpA
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 Cbc SpA filed Critical Cbc SpA
Publication of EP0908657A1 publication Critical patent/EP0908657A1/fr
Application granted granted Critical
Publication of EP0908657B1 publication Critical patent/EP0908657B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • This invention relates to a metal pipe swaging device.
  • connection can also be formed using a connector to which the two pipe pieces to be connected together are fixed, these being mounted over it or inserted into it.
  • the outer pipe is squeezed to achieve the connection using a conventional device provided with a swaging gripper comprising two jaws operated manually by the operator by means of levers.
  • Such a device is bulky and laborious to use, hence attempts have been made to motorize it.
  • an operating means comprising an electric motor of the type used in hand drills.
  • a conventional mechanical transmission converts the rotary movement of the drill motor shaft into a closure movement of the jaws of said swaging gripper.
  • the mechanical transmission used in this known device comprises a release mechanism which operates when the maximum required thrust is reached, or a friction clutch which slips on reaching this maximum thrust.
  • the object of this invention is to overcome the aforesaid drawbacks, in the case of both manual and motorized devices.
  • the pipe swaging device of the invention which is characterised in that the closure movement of the jaws which squeeze the pipe is achieved by a hydraulic transmission comprising:
  • the deformable wall portion of the reservoir is an elastic membrane (for example of rubber).
  • the pump operating means can be manual, by means of conventional levers, or an electric motor can be used together with relative conventional means for converting the rotary motion of the motor shaft into reciprocating movement of the pump piston.
  • an electric hand drill fixable to the casing of the pipe swaging device can be usefully used, with the drill chuck removed and replaced by a gear train which transmits the rotary movement of the drill motor shaft to a cam, the periphery of which engages a cam follower rigid with the outer end of the rod of the plunger pump.
  • a first safety valve is provided to discharge liquid from the first chamber into the second chamber, and hence into the reservoir, when the cylinder rod reaches its end of travel (maximum first chamber volume).
  • FIGS 1 and 2 show a pipe swaging device 82 of the invention combined with an operating means 15 of electric motor type.
  • the operating means 15 comprises an electric drill 10 of hand type (ie provided with a gun-type handgrip 12), from which the chuck has been removed and replaced with a train of gears (14, 16, 18) which transmit the rotary movement of the motor shaft pinion of the drill 10 to a cam 22, the lateral surface of which engages a cam follower 24 provided with a helical spring 26.
  • the cam follower is integral with the end of a plunger 28 of a pump 30, the plunger 28 being movable in both directions within the cylinder 32.
  • a rod 52 integral with a piston 54 provided with an O-ring 56 is slidable in both directions within the cylinder 44.
  • the piston 54 divides the interior of the cylinder 44 into two chambers, one of which is the aforesaid first chamber 42, the second chamber being indicated by 58.
  • the chambers 42 and 58 in which the same liquid contained in the reservoir 34 is present, are of variable volume in the sense that their volume depends on the position of the rod 52 and relative piston 54.
  • the liquid contained in the reservoir 34 is gradually fed under pressure into the first chamber 42. Consequently on the right face (with reference to Figure 1) of the piston 54 there is a greater pressure than on its opposite face. This causes the piston 54 and its rod 52 to move towards the left.
  • the rod 52 is hollow and contains a ball valve 68 maintained closed by the elastic reaction force of a precompressed spring 62, which when overcome results in the first chamber 42 communicating (via the channel 50) with the second chamber 58 and hence with the reservoir 34 via a second channel 72, to hence equalize the pressure in the two chambers 42 and 58. In this manner unwanted and dangerous overpressures in the first chamber 42 are prevented.
  • the valve 68 can be adjusted by varying the extent by which a grub screw 67 is screwed into a partially threaded internal cavity 71 in the rod 52.
  • the rod 52 has an annular step 60 which operates as a stop by abutting against the left end wall 70 of the cylinder 44 when the piston has moved completely to the left.
  • a portion of the inner wall of the reservoir 34 is deformable, this deformable portion consisting of a cup-shaped elastic membrane 74 (for example of a suitable rubber or plastic), sealedly locked in position by a cover 76 having a through hole 78 so that the pressure which acts on the outside of the membrane 74 is atmospheric.
  • the elastic membrane allows compensation of the incompressible liquid volumes involved.
  • a fork 84 which is rotatable relative to the cylinder 44, the axis of rotation of the fork 84 coinciding with that of the rod 52.
  • two idle rollers 80 which, when the rod 52 advances towards the left, engage the respective jaws 92 ( Figures 3 and 4) of a conventional pipe swaging gripper 90 applicable to the pipe swaging device 82. It is applied as shown in Figure 3, ie by inserting the shank 94 of the pipe swaging gripper 90 into the fork 84 (the gripper could also comprise two such shanks, the description being equally valid).
  • connection pin 86 is then inserted into the holes 88 provided in the arms of the fork 84 and into the corresponding hole 96 in the shank 94 (or into the corresponding holes in the two said shanks).
  • the jaw 92 of the gripper 90 is opened manually in the usual manner and the pipe to be swaged is positioned between the jaws 92 (the illustrated embodiment shows a sleeve into which two pieces of metal pipe 102 and 104 to be connected together have been previously inserted).
  • the electric motor of the drill 10 is operated (by pressing the pushbutton 11 with a finger of the hand holding the handgrip 12) to cause the rollers 80 to advance (to the position indicated by 80') and make contact with the interior of the respective jaws 92 (not shown open for simplicity in Figures 3 and 4), so that these latter close to squeeze the sleeve in the corresponding position.
  • the pushbutton 11 is released.
  • the rod 52 has not reached its end-of-travel position the incompressible liquid in the first chamber 42 remains under pressure, so that the jaws 92 remain closed.
  • a handwheel 49 has to be unscrewed, this handwheel when screwed down maintaining the ball valve 51 in position so as to interrupt communication with the conduit 53 which connects the conduit 48 to the reservoir 34.
  • the opening of the valve 51 consequent on the unscrewing of the handwheel 49 causes the pressure in the first chamber 42 to equal the pressure in the second chamber 58, so that a return spring 55 mounted coaxial with the rod 52 returns this latter to its rest position, so releasing the jaws 92.
  • the illustrated pipe swaging device 82 comprises a means for orientating the fork 84 in predetermined angular positions relative to the cylinder 44.
  • Figure 1 shows by way of example a positioning device of the aforesaid type consisting of a ball 83 pressed against the fork 84 by a precompressed spring, a notch 73 which the ball 83 can partly enter being provided in the surface of the fork 84 in the required angular positions (for example every 30 degrees).
  • the aforedescribed pipe swaging device has great power and is of much smaller dimensions and weight than known motorized pipe swaging devices, in addition to being simple to use and subject to much less wear than known pipe swaging devices.
  • the pipe swaging device of the invention can also be without motorization, the operating means then consisting of a conventional lever system enabling the pump 30 to be operated manually (for example by means of a lever).
  • the operating means then consisting of a conventional lever system enabling the pump 30 to be operated manually (for example by means of a lever).
  • Such an embodiment is useful in those cases in which a source of electricity is unavailable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Surgical Instruments (AREA)
EP98118890A 1997-10-13 1998-10-06 Machine à rétreindre de tuyaux à transmission hydraulique Expired - Lifetime EP0908657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI002312A IT1295321B1 (it) 1997-10-13 1997-10-13 Dispositivo strozzatubi a trasmissione idraulica
ITMI972312 1997-10-13

Publications (2)

Publication Number Publication Date
EP0908657A1 true EP0908657A1 (fr) 1999-04-14
EP0908657B1 EP0908657B1 (fr) 2001-05-23

Family

ID=11378032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118890A Expired - Lifetime EP0908657B1 (fr) 1997-10-13 1998-10-06 Machine à rétreindre de tuyaux à transmission hydraulique

Country Status (5)

Country Link
EP (1) EP0908657B1 (fr)
AT (1) ATE201491T1 (fr)
DE (1) DE69800825T2 (fr)
ES (1) ES2157108T3 (fr)
IT (1) IT1295321B1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1121997A1 (fr) * 2000-02-07 2001-08-08 C.B.C. S.p.A. Machine automatique à rétreindre de tuyaux à transmission hydraulique
EP1157786A2 (fr) * 2000-05-25 2001-11-28 Von Arx Ag Outil de sertissage pour sertir un élément déconnection
WO2007010339A2 (fr) * 2005-07-19 2007-01-25 Pi.Effe.Ci. S.R.L. Outil conçu pour le raccordement de tubes au moyen de manchons de raccordement
DE202006001889U1 (de) * 2006-02-03 2007-03-08 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Antriebseinheit für ein Preßgerät
WO2007082951A1 (fr) * 2006-01-23 2007-07-26 Gustav Klauke Gmbh Appareil de compression a entrainement hydraulique et procede de compression d'un raccord
CN101337349B (zh) * 2007-07-02 2012-09-26 古斯塔夫.克劳克有限责任公司 液压促动的手工工具
DE102007005837B4 (de) * 2006-02-03 2016-04-07 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Antriebseinheit für ein Preßgerät

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109676913B (zh) * 2018-12-29 2024-06-07 张家港市剑泉工具制造有限公司 一种钳子手柄套自动套装装置
CN117388083B (zh) * 2023-12-13 2024-02-13 常州森鸿装饰材料股份有限公司 一种地板强度检测装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869407A (en) * 1954-10-15 1959-01-20 Greenlee Bros & Co Portable metal working tool
GB1344784A (en) * 1971-07-23 1974-01-23 Novopress Gmbh Device for the production of pipe joint connections
EP0389716A1 (fr) * 1989-03-31 1990-10-03 Japan Storage Battery Company Limited Mécanisme à came et outil hydraulique motorisé
EP0775538A1 (fr) * 1995-11-23 1997-05-28 C.B.C. S.p.A. Dispositif de pliage de tubes à commande hydraulique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869407A (en) * 1954-10-15 1959-01-20 Greenlee Bros & Co Portable metal working tool
GB1344784A (en) * 1971-07-23 1974-01-23 Novopress Gmbh Device for the production of pipe joint connections
EP0389716A1 (fr) * 1989-03-31 1990-10-03 Japan Storage Battery Company Limited Mécanisme à came et outil hydraulique motorisé
EP0775538A1 (fr) * 1995-11-23 1997-05-28 C.B.C. S.p.A. Dispositif de pliage de tubes à commande hydraulique

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1121997A1 (fr) * 2000-02-07 2001-08-08 C.B.C. S.p.A. Machine automatique à rétreindre de tuyaux à transmission hydraulique
EP1157786A2 (fr) * 2000-05-25 2001-11-28 Von Arx Ag Outil de sertissage pour sertir un élément déconnection
EP1157786A3 (fr) * 2000-05-25 2002-01-16 Von Arx Ag Outil de sertissage pour sertir un élément déconnection
US6510723B2 (en) 2000-05-25 2003-01-28 Von Arx Ag Pressing tool for pressing coupling elements
WO2007010339A3 (fr) * 2005-07-19 2007-04-26 Pi Effe Ci S R L Outil conçu pour le raccordement de tubes au moyen de manchons de raccordement
WO2007010339A2 (fr) * 2005-07-19 2007-01-25 Pi.Effe.Ci. S.R.L. Outil conçu pour le raccordement de tubes au moyen de manchons de raccordement
US8336177B2 (en) 2005-07-19 2012-12-25 Autocondizionatori Zani S.R.L. Tool for the connection of tubes by means of connection sleeves
WO2007082951A1 (fr) * 2006-01-23 2007-07-26 Gustav Klauke Gmbh Appareil de compression a entrainement hydraulique et procede de compression d'un raccord
US8245561B2 (en) 2006-01-23 2012-08-21 Gustav Klauke Gmbh Hydraulically driven pressing device, and method of pressing a fitting
CN101370604B (zh) * 2006-01-23 2013-06-12 古斯塔夫.克劳克有限责任公司 液压传动压力装置及压制配件的方法
US8656574B2 (en) 2006-01-23 2014-02-25 Gustav Klauke Gmbh Hydraulically driven pressing device and method of pressing a fitting
US9016103B2 (en) 2006-01-23 2015-04-28 Gustav Klauke Gmbh Hydraulically driven pressing device, and method of pressing a fitting
DE202006001889U1 (de) * 2006-02-03 2007-03-08 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Antriebseinheit für ein Preßgerät
DE102007005837B4 (de) * 2006-02-03 2016-04-07 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Antriebseinheit für ein Preßgerät
CN101337349B (zh) * 2007-07-02 2012-09-26 古斯塔夫.克劳克有限责任公司 液压促动的手工工具

Also Published As

Publication number Publication date
DE69800825D1 (de) 2001-06-28
ATE201491T1 (de) 2001-06-15
IT1295321B1 (it) 1999-05-04
EP0908657B1 (fr) 2001-05-23
ES2157108T3 (es) 2001-08-01
ITMI972312A1 (it) 1999-04-13
DE69800825T2 (de) 2001-09-27

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