EP2569125B1 - Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue - Google Patents

Ensemble circuit pour faire fonctionner un tournevis dynamométrique ou analogue Download PDF

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Publication number
EP2569125B1
EP2569125B1 EP11752085.8A EP11752085A EP2569125B1 EP 2569125 B1 EP2569125 B1 EP 2569125B1 EP 11752085 A EP11752085 A EP 11752085A EP 2569125 B1 EP2569125 B1 EP 2569125B1
Authority
EP
European Patent Office
Prior art keywords
pressure
circuit arrangement
hydraulic
unit
controlled
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
EP11752085.8A
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German (de)
English (en)
Other versions
EP2569125A1 (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
Gedore Torque Solutions GmbH
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Publication date
Application filed by Gedore Torque Solutions GmbH filed Critical Gedore Torque Solutions GmbH
Publication of EP2569125A1 publication Critical patent/EP2569125A1/fr
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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.
  • a first consists in a pressure preselection by means of a manometer.
  • the target pressure is adjusted by means of a manual pressure regulator and a manometer.
  • an overflow valve responds.
  • 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 second-named variant "pressure preselection by means of a pressure switch” makes it possible to adjust the pressure separately from the hydraulic power unit.
  • the disadvantage here is that the pressure can not be maintained because the switch interrupts the hydraulic supply and thus to a certain extent the "flow pressure". In this way, a creep of the screw can not be compensated.
  • a method and apparatus for controlling a hydraulically powered power wrench has become known with a lever pivotable by a piston-cylinder unit with a ratchet assembly for incrementally rotating a ratchet sleeve through pre-strokes and return strokes and a drive unit having a motor-driven pump for tightening a threaded connection.
  • a combined switching and pressure control valve is used, which has a pressure relief valve. This pressure relief valve in the changeover and pressure control valve is closed so that a pump pressure can build up. When the target pressure is reached, the changeover and pressure control valve is switched to pressure relief. Also, this "flow pressure" is interrupted and a creep of the screw can not be compensated.
  • a hydraulically operated power wrench and a method for its production also go from the DE 198 13 900 A1 out.
  • the DE 10 2004 059 859 B3 discloses a motor-operated hydraulic pump for driving hydraulic tools, in particular hydraulic wrenches.
  • the DE 10 2004 058 338 A1 discloses a device for controlling a screwing with a screw system with at least one hydraulically operated power wrench with a piston-cylinder unit, which is connected via a respective arranged on a load side and a return stroke hydraulic hose with a drive unit with a motor-driven pump.
  • the US 5,792,967 discloses a pump unit for tightening threaded connections.
  • 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 is done by keeping the pressure in this condition.
  • 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 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.
  • 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 a drive signal for the proportional valve 12 as a function of the pressure detected by means of the pressure measuring means 22 and optionally also as a function of the return quantity of the fluid detected by the quantity detection means 15.
  • the opening cross section and thus the pressure in the hydraulic line flow 14 and thus in the cylinder chamber 28 can also be omitted.
  • the detection of the pressure by the pressure detecting means 22 is sufficient.
  • 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)

Claims (4)

  1. Ensemble circuit pour faire fonctionner une visseuse dynamométrique hydraulique ou analogue doté d'une unité piston-cylindre (18) qui peut être démarrée par une pompe (11) avec une pression predeterminable, caractérisé en ce que l'unité piston-cylindre (18) peut être démarrée par la pompe (11) par le biais d'une vanne proportionnelle (12), laquelle fonctionne à la fois en tant qu'unité d'inversion entre un circuit d'avance et un circuit de retour et en tant que vanne de limitation de la pression et est prévue pour des pressions jusqu'à 800 bar.
  2. Ensemble circuit selon la revendication 1, caractérisé en ce que la vanne proportionnelle (12) peut être commandée par un dispositif de commande (16) auquel peuvent être transmis des signaux d'un moyen de détection de quantité (15) disposé sur le circuit d'avance/ de retour et/ou d'un moyen de mesure de pression (22).
  3. Ensemble circuit selon la revendication 2, caractérisé en ce qu'un ajustage du dispositif de commande (16) par un personnel d'entretien a lieu au moyen une télécommande (31) communiquant avec le dispositif de commande (16) par voie filaire ou sans fil.
  4. Ensemble circuit selon l'une des revendications précédentes, caractérisé en ce que le commande de la vanne proportionnelle (12) a lieu en fonction des signaux du moyen de détection de quantité (15) et/ou du moyen de mesure de pression (22).
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 EP2569125A1 (fr) 2013-03-20
EP2569125B1 true 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
WO2018213513A1 (fr) 2017-05-16 2018-11-22 Actuant Corporation 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
ATE405748T1 (de) * 2004-11-19 2008-09-15 Festo Ag & Co Kg Diagnosevorrichtung für wenigstens eine pneumatische ventil-aktuator-anordnung
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
None *

Also Published As

Publication number Publication date
CA2800344A1 (fr) 2011-12-08
CN102985225A (zh) 2013-03-20
WO2011150909A1 (fr) 2011-12-08
EP2569125A1 (fr) 2013-03-20
RU2012153248A (ru) 2014-06-20
US9193049B2 (en) 2015-11-24
CN102985225B (zh) 2015-11-25
BR112012028775A2 (pt) 2016-07-19
RU2557859C2 (ru) 2015-07-27
US20130125715A1 (en) 2013-05-23
DE102010020258A1 (de) 2011-11-17

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