EP0908657B1 - Rohrschmiedegerät mit hydraulischem Antrieb - Google Patents

Rohrschmiedegerät mit hydraulischem Antrieb Download PDF

Info

Publication number
EP0908657B1
EP0908657B1 EP98118890A EP98118890A EP0908657B1 EP 0908657 B1 EP0908657 B1 EP 0908657B1 EP 98118890 A EP98118890 A EP 98118890A EP 98118890 A EP98118890 A EP 98118890A EP 0908657 B1 EP0908657 B1 EP 0908657B1
Authority
EP
European Patent Office
Prior art keywords
chamber
cylinder
rod
reservoir
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.)
Expired - Lifetime
Application number
EP98118890A
Other languages
English (en)
French (fr)
Other versions
EP0908657A1 (de
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/de
Application granted granted Critical
Publication of EP0908657B1 publication Critical patent/EP0908657B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 apparatus of the type claimed in the preamble of claim 1.
  • a metal pipe swaging apparatus of the type claimed in the preamble of claim 1.
  • Such an apparatus is known from GB-A-1 344 784.
  • Similar devices are already known and in recent years have been increasingly used in plant construction (for example in heating plants and water or air distribution plants) for example for connecting together two pieces of metal pipe by means of a metal sleeve, without using heat.
  • the sleeve is inserted in known manner into the outer pipe piece, which is then squeezed usually in two different positions to form the connection.
  • the seal is provided by two or more O-rings.
  • the 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 deformable wall portion of the reservoir is an elastic membrane (for example of rubber).
  • the pump operating means are an electric motor which is used together with relative conventional means for converting the rotary motion of the motor shaft into reciprocating movement of the pump piston. Such means are disclosed in EP-A-389716.
  • An electric hand drill fixable to the casing of the pipe swaging apparatus is 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 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 0-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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Actuator (AREA)
  • Surgical Instruments (AREA)

Claims (6)

  1. Gerät zum Schmieden von Metallrohren (100), mit einem Schmiede-Greifer (90) mit zwei Einspannbacken (92) und einer Vorrichtung (82) zum Betätigen des Greifers (90) und mit zwei Leerlauf-Walzen (80), die an einem Ende einer Stange (52) montiert sind, die in beide Richtungen axial beweglich ist, wobei die Stange in eine der Richtungen verlagerbar ist, um zu bewirken, daß jede Walze (80) mit dem zugehörigen inneren hinteren Bereich von einer Einspannbacke (92) in Kontakt kommt, wodurch das Schließen der Einspannbacken (92) bewirkt wird, wobei die Vorrichtung (82) außerdem eine hydraulische Übertragungseinrichtung aufweist, mit:
    einem Zylinder (44), in dem die Stange (52) beweglich ist, wobei das Ende der Stange (52) mit den Walzen (80) aus dem Zylinder (44) durch eine geeignet abgedichtete Öffnung heraustritt und an dem anderen Ende der Stange (52) ein abgedichteter Kolben (54) koaxial angebracht ist, dadurch gekennzeichnet, daß der Kolben (54) das Innere des Zylinders (44) in eine erste Kammer (42) und eine zweite Kammer (58) unterteilt, die beide eine inkompressible Flüssigkeit enthalten, wobei ein Anstieg des Volumens in der ersten Kammer (42) das Schließen der Einspannbacken (92) bewirkt;
    wobei die hydraulische Übertragungseinrichtung außerdem aufweist:
    ein Behältnis (34), in dem ebenfalls die inkompressible Flüssigkeit enthalten ist, wobei das Gehäuse des Behältnisses (34) einen Abschnitt (74) beinhaltet, der als eine Folge der Veränderung der Flüssigkeitsmenge in dem Behältnis (34) in einem bestimmten Bereich elastisch verformbar ist;
    eine Plungerpumpe (30), die durch einen Elektromotor betrieben wird, um die in dem Behältnis (34) enthaltene Flüssigkeit abzusaugen und sie unter Druck durch eine erste Leitung (36, 46, 48) in die erste Kammer (42) des Zylinders (44) zu pumpen;
    eine zweite Leitung (72), die die zweite Kammer (58) des Zylinders (44) mit dem Behältnis (34) verbindet;
    eine dritte Leitung (53), die die erste Kammer (42) unter Umgehung der Pumpe (30) mit dem Behältnis (34) verbindet;
    manuell betätigbare Verschußmittel (51, 49), die in der dritten Leitung (53) vorgesehen sind; und
    elastische Rückziehmittel (55), um die Stange (52) in eine Position zurückzuziehen, die einem minimalen Volumen der ersten Kammer (42) des Zylinders (44) entspricht, wenn die Verschlußmittel (51, 49) in der dritten Leitung (53) offen sind, wobei der Elektromotor, durch den die Pumpe (30) betrieben wird, zu einer elektrischen Handbohrmaschine (10) gehört, die an dem Gehäuse der Vorrichtung (82) anbringbar ist, wobei das Bohrfutter entfernt und durch ein Getriebe (20, 14, 16, 18) ersetzt ist, durch das die Drehbewegung der Motorwelle der Bohrmaschine (10) auf einen Nocken (22) übertragen wird, dessen Umfang mit einem Nockenstößel (24) eingreift, der mit dem äußeren Ende der Stange der Plungerpumpe (30) starr verbunden ist.
  2. Gerät nach Anspruch 1, bei dem der elastische verformbare Wandabschnitt des Behältnisses (34) eine elastische Membran (74) ist.
  3. Gerät nach einem der vorhergehenden Ansprüche, mit einem Sicherheitsventil (68), das es ermöglicht, die inkompressible Flüssigkeit aus der ersten Kammer (42) in die zweite Kammer (58) abzuleiten, wenn die Stange (52) des Zylinders (44) ihre Verlagerungs-Endposition bei maximaler äußerer Erstreckung der Stange (52) erreicht.
  4. Gerät nach Anspruch 3, bei dem das Sicherheitsventil (68) einstellbar ist.
  5. Gerät nach einem der vorhergehenden Ansprüche, bei dem die manuell betätigbaren Verschlußmittel ein Handrad (48) sind, das beim Aufschrauben ein Kugelventil (51) öffnet, durch das die dritte Leitung (53) geschlossen wird.
  6. Gerät nach Anspruch 1, bei dem die Walzen (80) zwischen den beiden Schenkeln einer Gabel (84) angeordnet sind, die drehbar an dem Zylinder (44) montiert ist, wobei die Drehachse der Gabel (84) mit der der Stange (52) zusammenfällt.
EP98118890A 1997-10-13 1998-10-06 Rohrschmiedegerät mit hydraulischem Antrieb Expired - Lifetime EP0908657B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=11378032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118890A Expired - Lifetime EP0908657B1 (de) 1997-10-13 1998-10-06 Rohrschmiedegerät mit hydraulischem Antrieb

Country Status (5)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1316351B1 (it) * 2000-02-07 2003-04-10 Cbc Spa Dispositivo strozzatubi a trasmissione idraulica automatico
ATE347973T1 (de) 2000-05-25 2007-01-15 Arx Ag Presswerkzeug für die verpressung von kupplungselementen
US8336177B2 (en) 2005-07-19 2012-12-25 Autocondizionatori Zani S.R.L. Tool for the connection of tubes by means of connection sleeves
DE102006003044B4 (de) * 2006-01-23 2015-10-08 Gustav Klauke Gmbh Hydraulisch angetriebenes Verpressgerät sowie Verfahren zum Verpressen eines Fittings
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
DE102007030644A1 (de) * 2007-07-02 2009-01-08 Gustav Klauke Gmbh Hydraulisch betätigbares Handwerkzeug
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

Family Cites Families (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
DE2136782C2 (de) * 1971-07-23 1982-12-02 Novopress GmbH Pressen und Presswerkzeuge & Co KG, 4000 Düsseldorf Tragbares druckmittelbetriebenes Klemmwerkzeug
EP0389716B1 (de) * 1989-03-31 1994-05-18 Japan Storage Battery Company Limited Nockenantrieb und angetriebenes Hydraulikwerkzeug
IT237303Y1 (it) * 1995-11-23 2000-09-05 Cbc Spa Apparecchio curvatubi a trasmissione idraulica

Also Published As

Publication number Publication date
DE69800825D1 (de) 2001-06-28
ITMI972312A1 (it) 1999-04-13
EP0908657A1 (de) 1999-04-14
ES2157108T3 (es) 2001-08-01
ATE201491T1 (de) 2001-06-15
DE69800825T2 (de) 2001-09-27
IT1295321B1 (it) 1999-05-04

Similar Documents

Publication Publication Date Title
EP0908657B1 (de) Rohrschmiedegerät mit hydraulischem Antrieb
US4805496A (en) Hydraulic power wrench
US5425164A (en) Hand-tool system for installing blind fasteners
US4587732A (en) Cable cutting and crimping
EP1339509A1 (de) Tragbares hand-crimpwerkzeug
EP1910035B1 (de) Werkzeug zur verbindung von leitungen mittels verbindungsmuffen
CN101124069B (zh) 液压手动工具
GB2042335A (en) Modular fire fighting apparatus
JPS62296925A (ja) 液圧クリンプ加工工具
CN105171698B (zh) 液压工具
US4151720A (en) Manually operable hydraulic actuator
US8151666B1 (en) Twist throttle with integral hydraulic master cylinder
US4521963A (en) Hydraulic cable and rod cutting and crimping device
GB2112874A (en) Hydraulic jacks
US4667502A (en) Hydraulic compression apparatus
US5894667A (en) Hand tools
EP1859749A2 (de) Druckgasbetätigtes chirurgisches Instrument
US20180161845A1 (en) Hydraulic tool
US4149381A (en) Single hand operated tool
RU2509211C2 (ru) Устройство для подсоединения подводящей трубы к внутреннему каналу анкерного болта
EP1121997B1 (de) Automatisches Rohrverpressgerät mit hydraulischem Antrieb
KR102239876B1 (ko) 산업용 약액저장탱크 뚜껑의 소형 안전개폐장치
US4745831A (en) Setting tool for screwing-in threaded rods
JPH0741544B2 (ja) パワーレンチ
CN218494320U (zh) 一种手动远程控制阀

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR GB IT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19990721

AKX Designation fees paid

Free format text: AT DE ES FR GB IT SE

17Q First examination report despatched

Effective date: 19991228

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 201491

Country of ref document: AT

Date of ref document: 20010615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69800825

Country of ref document: DE

Date of ref document: 20010628

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2157108

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
ET Fr: translation filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20130918

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20131017

Year of fee payment: 16

Ref country code: DE

Payment date: 20131002

Year of fee payment: 16

Ref country code: GB

Payment date: 20131025

Year of fee payment: 16

Ref country code: FR

Payment date: 20131028

Year of fee payment: 16

Ref country code: AT

Payment date: 20131016

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69800825

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 201491

Country of ref document: AT

Kind code of ref document: T

Effective date: 20141006

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20141006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141006

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150501

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141007

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141006

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141031

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20151127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141007

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170925

Year of fee payment: 20