EP2569125A1 - Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue - Google Patents

Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue

Info

Publication number
EP2569125A1
EP2569125A1 EP11752085A EP11752085A EP2569125A1 EP 2569125 A1 EP2569125 A1 EP 2569125A1 EP 11752085 A EP11752085 A EP 11752085A EP 11752085 A EP11752085 A EP 11752085A EP 2569125 A1 EP2569125 A1 EP 2569125A1
Authority
EP
European Patent Office
Prior art keywords
pressure
circuit arrangement
unit
piston
proportional valve
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
EP11752085A
Other languages
German (de)
English (en)
Other versions
EP2569125B1 (fr
Inventor
Marc Gareis
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.)
Gedore Holding GmbH
Original Assignee
Losomat Schraubtechnik Neef GmbH
Loesomat Schraubtechnik Neef GmbH
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 Losomat Schraubtechnik Neef GmbH, Loesomat Schraubtechnik Neef GmbH filed Critical Losomat Schraubtechnik Neef GmbH
Publication of EP2569125A1 publication Critical patent/EP2569125A1/fr
Application granted granted Critical
Publication of EP2569125B1 publication Critical patent/EP2569125B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • B25B23/1456—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers having electrical components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B13/0442—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with proportional solenoid allowing stable intermediate positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/09—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor with electrical control means

Definitions

  • the invention relates to a circuit arrangement for operating a torque wrench or the like, which has a piston-cylinder unit, which can be controlled by a pump with a predetermined pressure.
  • Such hydraulic torque wrenches are often connected with long, often with up to 10 m long hoses with a hydraulic unit that includes the pump. An operator operating the hydraulic torque wrench is thus no longer within sight of the hydraulic power unit. However, a visual inspection of whether the set pressure has actually been reached makes it essential to have a manometer located in the area of the hydraulic unit. Therefore, there is a desire of the operator to be able to set and read all functions of the hydraulic unit by means of a remote control, without having to go to the momentary and the torque wrench example remote location of the hydraulic unit.
  • CONFIRMATION COPY A first consists in a pressure preselection by means of a manometer. Usually, the target pressure is adjusted by means of a manual pressure regulator and a manometer. As soon as the set final pressure is reached, an overflow valve responds. Here, the set final pressure can be maintained.
  • Another variant relates to the pressure preselection by means of a pressure switch.
  • the set target pressure is controlled by a pressure switch.
  • the pressure switch interrupts the supply of hydraulic fluid. With this method, the set final pressure can not be maintained.
  • the invention has for its object to provide a circuit arrangement available, which allows the operator to operate the hydraulic unit connected, for example, hydraulic wrench completely by means of a control panel in the form of a remote control and thereby also a short-term creep of a screw through a pending pressure to master. This happens because the pressure is maintained in this case.
  • the basic idea of the invention is to use a proportional valve for very high pressures in a circuit arrangement for a hydraulic unit in the forward / reverse flow of the piston-cylinder unit.
  • the proportional valve is designed for pressures of up to 800 bar.
  • the proportional valve is electrically controllable, wherein the opening cross-section of the valve is variable depending on the control variable, for example a drive voltage.
  • an advantageous development provides that the proportional valve can be controlled by a control device.
  • This control device signals of a arranged in the forward and / or return flow rate detection means and / or a pressure detection means can be fed.
  • control device by an operator by means of a remote control unit data can be fed.
  • the control device controls the voltage applied to the piston-cylinder unit pressure via the proportional valve in response to the signals of the quantity detection means and / or the pressure detecting means.
  • a pressure control is possible, which allows holding the pressure and thus also allows compensation of the above-mentioned short-term creep of screw connections.
  • a hydraulic torque wrench comprises a piston-cylinder unit 18 with a piston 19 arranged in a cylinder 26, with a piston rod-side pressure chamber 20 arranged on the side of a piston rod 21 and with a cylinder space 28.
  • Both the piston rod-side pressure chamber 20 and the cylinder chamber 28 are each connected via hydraulic lines, a hydraulic line return 13, which opens into the piston rod side pressure chamber 20, and a hydraulic line flow 14, which opens into the cylinder chamber with a tank 10.
  • a single or multi-stage pump 11 is arranged, which is operated by a motor M.
  • the pump 11 itself and its motor M can be arranged in the hydraulic fluid for cooling purposes.
  • a proportional valve 12 is connected, which is controllable via an electrical control line 27 by a control device 16.
  • the control device 16 in turn is adjustable via an electrical line or via radio from a remote control unit 31, that is, there is a data exchange between the controller 16 and the remote control unit 31 instead.
  • a quantity detection means 15 is arranged in the hydraulic line return 13 in the hydraulic line return 13, a quantity detection means 15 is arranged in the hydraulic line return 13, a quantity detection means 15 is arranged in the hydraulic line return 13, a quantity detection means 15 is arranged.
  • the hydraulic line flow 14 has a pressure measuring means 22. Both the output signals of the quantity detecting means 15 and the output signals of the pressure measuring means 22 are supplied to the control device 16 via electrical lines 17 and 23.
  • the operation of the circuit arrangement is carried out by an operator (not shown) who is located in the region of the screw connection to be produced, for example.
  • This operator can specify by means of the remote control unit 31 desired data, such as the tightening torque of the screw, which are supplied to the control unit 16.
  • the control unit 16 calculates in dependence on the means of the
  • Pressure measuring means 22 detected pressure and optionally also in response to the detected by means of the quantity detection means 15 return amount of the fluid, a drive signal for the proportional valve 12th
  • the proportional valve 12 has two functions in this circuit arrangement. On the one hand, it performs the function of a reversing unit between flow and return, on the other hand, it serves as a pressure limiting means to set a preset by an operator by means of the remote control unit 31 pressure and hold. As a result, creeping processes which are compensated when producing screw connections which are subjected to a very high torque can also be compensated.
  • the proportional valve is designed for very high pressures, which can be up to 800 bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

Ensemble circuit pour faire fonctionner un tournevis dynamométrique hydraulique ou analogue, comportant une unité piston-cylindre (18) qui peut être amorcée par une pompe (11) avec une pression pouvant être prédéfinie. L'invention est caractérisée en ce que l'unité piston-cylindre (18) peut être amorcée par la pompe (11) par l'intermédiaire d'une valve proportionnelle (12) qui agit à la fois comme unité d'inversion entre avance et retour et comme limiteur de pression.
EP11752085.8A 2010-05-11 2011-05-06 Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue Active EP2569125B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010020258A DE102010020258A1 (de) 2010-05-11 2010-05-11 Schaltungsanordnung zum Betreiben eines Drehmomentschraubers oder dergleichen
PCT/DE2011/001043 WO2011150909A1 (fr) 2010-05-11 2011-05-06 Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue

Publications (2)

Publication Number Publication Date
EP2569125A1 true EP2569125A1 (fr) 2013-03-20
EP2569125B1 EP2569125B1 (fr) 2019-04-24

Family

ID=44581856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11752085.8A Active EP2569125B1 (fr) 2010-05-11 2011-05-06 Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue

Country Status (8)

Country Link
US (1) US9193049B2 (fr)
EP (1) EP2569125B1 (fr)
CN (1) CN102985225B (fr)
BR (1) BR112012028775A2 (fr)
CA (1) CA2800344A1 (fr)
DE (1) DE102010020258A1 (fr)
RU (1) RU2557859C2 (fr)
WO (1) WO2011150909A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017060777A2 (fr) * 2015-10-05 2017-04-13 HYTORC Division Unex Corporation Appareil de serrage d'éléments de fixation filetés
EP4276310A3 (fr) 2017-05-16 2024-01-17 Enerpac Tool Group Corp. (a1 a4) pompe hydraulique
EP3653888B1 (fr) * 2018-11-13 2023-01-25 Enerpac Tool Group Corp. Système d'alimentation hydraulique et son procédé de commande

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228900A1 (de) * 1981-08-21 1983-03-31 Sperry Corp., 10019 New York, N.Y. Rueckkopplungsgesteuertes, hydraulisches ventilsystem
JP2714449B2 (ja) * 1989-08-08 1998-02-16 株式会社日立製作所 可変速ポンプシステム
RU2037392C1 (ru) * 1991-03-19 1995-06-19 Малое предприятие "Мехсборка" Способ контроля и управления затяжкой резьбовых соединений и устройство для его осуществления
US5668328A (en) * 1996-07-17 1997-09-16 Applied Power Inc. Method and apparatus for hydraulically tightening threaded fasteners
DE19813900A1 (de) 1998-03-28 1999-09-30 Frank Hohmann Hydraulisch betriebener Kraftschrauber und Verfahren zu seiner Herstellung
US6286412B1 (en) * 1999-11-22 2001-09-11 Caterpillar Inc. Method and system for electrohydraulic valve control
CN101061320B (zh) * 2004-11-19 2011-06-08 费斯托股份有限两合公司 用于至少一个风动的阀门-促动器装置的诊断装置
DE102004058338A1 (de) * 2004-12-02 2006-06-08 Werner, Karl-Heinz, Dipl.-Ing. Steuerung eines Schraubvorgangs
DE102004059859B3 (de) * 2004-12-11 2006-08-10 Junkers, Holger, Dipl.-Ing.(FH) Motorisch betriebene Hydraulikpumpe zum Antrieb von hydraulischen Werkzeugen insbesondere von Hydraulikschraubern
DE102008019765A1 (de) 2008-04-18 2009-10-22 Hohmann, Jörg Verfahren und Vorrichtung zum Steuern eines hydraulisch betriebenen Kraftschraubers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011150909A1 *

Also Published As

Publication number Publication date
WO2011150909A1 (fr) 2011-12-08
CN102985225B (zh) 2015-11-25
CN102985225A (zh) 2013-03-20
DE102010020258A1 (de) 2011-11-17
US20130125715A1 (en) 2013-05-23
CA2800344A1 (fr) 2011-12-08
RU2012153248A (ru) 2014-06-20
US9193049B2 (en) 2015-11-24
BR112012028775A2 (pt) 2016-07-19
EP2569125B1 (fr) 2019-04-24
RU2557859C2 (ru) 2015-07-27

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