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EP2353788B1 - Procédé d'enfilage d'une liaison par vissage par allongement de la vis - Google Patents

Procédé d'enfilage d'une liaison par vissage par allongement de la vis Download PDF

Info

Publication number
EP2353788B1
EP2353788B1 EP10016108.2A EP10016108A EP2353788B1 EP 2353788 B1 EP2353788 B1 EP 2353788B1 EP 10016108 A EP10016108 A EP 10016108A EP 2353788 B1 EP2353788 B1 EP 2353788B1
Authority
EP
European Patent Office
Prior art keywords
elongation
screw
power
power wrench
torque
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.)
Not-in-force
Application number
EP10016108.2A
Other languages
German (de)
English (en)
Other versions
EP2353788A3 (fr
EP2353788A2 (fr
Inventor
Lothar Galehr
Manuel Zint
Jürgen Ing. Wachter
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.)
Liebherr Werk Nenzing GmbH
Original Assignee
Liebherr Werk Nenzing 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 Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Publication of EP2353788A2 publication Critical patent/EP2353788A2/fr
Publication of EP2353788A3 publication Critical patent/EP2353788A3/fr
Application granted granted Critical
Publication of EP2353788B1 publication Critical patent/EP2353788B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • 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
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • 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
    • B25B23/1405—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers for impact 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • B25B23/1475—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers for impact wrenches or screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds

Definitions

  • the present invention relates to a method for tightening a screw with elongation of the screw, wherein a power wrench is used, in which strokes of a force member, in particular a hydraulic cylinder, are converted into a rotational movement of a screwing.
  • a power wrench is used, in which strokes of a force member, in particular a hydraulic cylinder, are converted into a rotational movement of a screwing.
  • tools are used as force wrench, in which the angle of rotation per stroke of the force member forms a constant.
  • a method for tightening screw with power wrenches in which strokes of a force member are converted into a rotational movement of a screwing are for example from DE 198 13 900 A1 as well as the WO 03/013797 A1 known.
  • Object of the present invention is therefore to provide a method for tightening a screw available, which is simple and inexpensive to implement and still allows a process-reliable reaching a desired SSenlShung with low tolerances.
  • a method according to claim 1 In the method according to the invention for tightening a screw connection while elongating the screw, a power wrench is used in which strokes of a force member, in particular a hydraulic cylinder, are converted into a rotary movement of a screwing tool.
  • the inventive method is carried out at least in two steps. In a first step, the screw is first tightened to a predetermined torque. In a second step, the screw is then finished with a predetermined number of complete strokes of the power element of the power wrench.
  • a torque method is combined with a rotation angle method controlled by the number of strokes.
  • controlled elongation with small tolerances of the overall elongation can be achieved even when conventional power wrenches are used.
  • tolerances of less than +/- 10% can be achieved.
  • This can be dispensed with the use of costly and relatively large rotary screwdriver with rotation angle sensors.
  • complicated controls, which are based on sensor values such. B. based on angle sensors, a volume measurement of the hydraulic fluid or a time measurement, be completely dispensed with.
  • the influence of friction coefficients during the screwing procedure is minimized compared to pure torque methods, see above that the process security is improved.
  • the effects of friction are shifted exclusively in the first step, ie in the joining moment range.
  • the friction no longer has any influence on the screw elongation.
  • the method is extremely simple and inexpensive to use.
  • the joining torque is adjusted so that subsequently the desired screw elongation can be achieved with high accuracy and process reliability by completely executed strokes of the tool.
  • the method according to the invention therefore advantageously further comprises the steps of specifying a desired overall elongation and a determination of a joining moment for achieving a joint elongation which is dimensioned such that the desired overall elongation can be achieved by the joint elongation and a number of complete strokes of the power element of the power wrench.
  • the total elongation is thus composed of the joint elongation by tightening the screwdriver connection to the joining moment and by the elongation by the number of whole strokes of the force member of the power screwdriver.
  • the inventive method further advantageously comprises the step of determining a rotation angle generated by a whole stroke of the force member of the power wrench used. This results in a tool constant, by which a calculation of the necessary for a required elongation number of whole Huben can be determined.
  • the present invention comprises the step of determining an elongation of the inserted screw generated by an entire stroke of the force member of the power wrench used. If the elongation of the inserted screw is known per entire stroke of the force member, the elongation of the screw achieved during the second step can be calculated by a simple multiplication by the number of whole strokes. Alternatively, however, the elongation achieved by several whole strokes can also be determined directly.
  • the elongation of the screw by a whole stroke is on the one hand by the rotation angle generated by the power screwdriver by a whole stroke of the force member and on the other hand by the geometry of the screw, in particular of the pitch of the helical turns dependent.
  • the method according to the invention can comprise the step of determining a lengthening of the inserted screw produced by a specific angle of rotation. If the elongation of the screw used is known at a certain angle of rotation, the length of rotation produced by a whole stroke of the force element can be determined, knowing the angle of rotation produced by a complete stroke. Alternatively, the elongation of the screw per entire stroke can also be determined directly.
  • the invention provides that the determination of the rotation angle generated by a whole stroke of the force member of the power wrench used is determined in advance for the used power wrench or for the type of power wrench used.
  • the angle of rotation per stroke of the force member must thus be determined only once for each power wrench or Kraftschraubertyp, and can then be used in a variety of Verschraubvor réellen.
  • the elongation of the screw used can be determined in advance by the whole stroke of the force member of the power wrench used for the type of screwdriver used and the screw type used.
  • the determination of the abovementioned values can be effected both by tests and by mathematical calculations from the geometry of the power wrench and / or the screw used.
  • the determination is carried out by a measurement.
  • a measurement can be carried out on a plurality of similar power wrenches and / or screws and an averaging can be used to determine the required values.
  • the measurement can be carried out at different torques, wherein the value used is effected by averaging.
  • the joining torque is adjusted so that the desired total elongation is achieved by the then fully executed whole strokes.
  • the required number of whole strokes and the necessary joining moment can also be determined directly by trial and error for a desired elongation. This determination also advantageously takes place in advance for the power wrench and / or power wrench type used and / or the screw type used. The corresponding values can then be specified for tightening the screw connection.
  • the joining moment is advantageously between 5% and 50% of the maximum tightening torque.
  • the joining torque is still advantageously between 15% and 35% of the maximum tightening torque, moreover advantageously about 25% of the maximum tightening torque.
  • the joining moment is predetermined such that a certain elongation of the screw already takes place during the first step of the method.
  • the joining moment need not necessarily be applied via the same power wrench, which in the second step with a predetermined number of complete strokes of the force member, the screw tightened compound is ready.
  • the joining torque can also be applied by a torque wrench, a torque motor driven by a rotary motor or the like.
  • the joining moment is applied via the same power wrench, which is also used in the second step.
  • this is a torque wrench.
  • the joining moment is adjusted by the pressure of the hydraulic fluid, with which the hydraulic cylinder of the power wrench is acted upon.
  • the method according to the invention is less sensitive to purely controllable coefficients and other influencing factors during the screwing process than pure torque methods, since the torque control is initially used only for the application of the joining torque, which is significantly lower than the maximum tightening torque. This also limits the effects of friction on this area. Thereupon, by using whole strokes, a simple and effective control of the length of the screw over the angle of rotation takes place.
  • the maximum tightening torque of the power wrench or the maximum pressure with which the force member is acted upon adjusted so that the last stroke performed entirely becomes.
  • at least this last stroke is monitored with a simple control.
  • a predetermined value can be used, which would also be used as a final value in a pure torque-controlled method.
  • the tightening of a screw connection according to the invention in two steps also allows in this case a particularly process-safe lengths of the screw, wherein the maximum elongation is set to the same value both on the pressure limit, as well as on the Fügellindung and the number of strokes.
  • the method according to the invention can still be used to achieve a high-precision screw elongation, particularly in a tolerance range of +/- 10%, with the simplest means.
  • no measurement of the helix angle takes place via a rotation angle sensor.
  • a rotation angle sensor can be omitted, since in the second step, the angle of rotation can be determined by the whole strokes of the tool and the screw geometry.
  • the method can be carried out with power wrenches, which have no rotation angle sensor.
  • a control which activates the power wrench on the basis of sensor data such as angle sensors, volume measurement and time measurement.
  • sensor data such as angle sensors, volume measurement and time measurement.
  • a regulation of the rotational movement generated by the power wrench can be dispensed with via a corresponding control electronics and / or control hydraulics.
  • control of the power wrench is done manually or by means of a simple control of Hubierevorgabe.
  • the present invention further comprises, in addition to the above-described method, the use of a power wrench in which strokes of a force member, in particular a hydraulic cylinder, are converted into a rotary movement of a screwing tool in such a method.
  • a power wrench in which strokes of a force member, in particular a hydraulic cylinder, are converted into a rotary movement of a screwing tool in such a method.
  • the power wrench used for a method according to the invention can have as a force member in particular a hydraulic piston-cylinder drive whose linear motion is converted by a corresponding device into a rotary movement of a screwing tool.
  • the screwing tool has in particular a connecting element for detachable connection with a screw and / or a nut.
  • the screwing tool may in particular be a wrench or a wrench insert through which a rotational connection with a screw or a nut can be made. In particular, these are positive-fit tool inserts.
  • the power wrench comprises a ratchet device, by which this intermittent movement of the force member is converted into a rotational movement in a certain direction.
  • the stroke monitoring of the power wrench can continue to be carried out by means of a simple sensor system close to the force member, whereby the tool geometry does not have to be changed. As a result, an end position monitoring of all strokes is given.
  • a tool constant ⁇ must be determined for the power wrench used or for the type of power wrench used, which describes the rotation angle generated by a complete stroke of the force element. This constant ⁇ must be determined only once for each tool or for each tool type. This tool constant can be determined both by appropriate tests, and theoretically based on the tool geometry.
  • the method according to the invention can be used for all screwdriver tools in which such a relationship between tool stroke and elongation or angle of rotation can be determined.
  • the elongation I of the screw must be determined as a function of the angle of rotation. This can be done in advance for each screw type. Again, this can be done either by a measurement, or by a corresponding theoretical calculation based on the screw geometry.
  • stage 1 a predetermined joining moment is introduced into the screw connection.
  • stage 2 a number of stroke controlled screw elongation.
  • the specified screw elongation can be achieved process-safe in the required tolerance range by the joining torque is adjusted so that then carried out by completely executed tool strokes the desired Intellnatureung.
  • the required joining moment can be z. B. be determined by means of experiment. Usually, a joining moment of approximately 25% of the total required tightening torque should be used.
  • the joining torque can be applied, for example, by torque wrench, torque wrench and the like.
  • the required number of strokes of the tool in the subsequent screw elongation by means of entire strokes can be determined by experiment.
  • the inventive method is again based on FIG. 1 shown in more detail.
  • the screw elongation L is plotted over the time t in a diagram.
  • an elongation takes place by applying a predetermined Add Moments.
  • the remaining elongation of the screw is made by one or more whole strokes 3.
  • the required screw elongation is reached.
  • the joining torque is adjusted so that the required elongation can be achieved by the subsequent whole strokes of the screwing.
  • plateau phases 2 in the diagram between the joint extension and the whole strokes correspond to the return stroke of the force member.
  • the force member is returned to its original position, without rotation of the screw or screw elongation would take place.
  • the torque or the pressure is limited so that the last stroke is completed.
  • a corresponding control device may be provided which monitors at least the last stroke.
  • the torque or pressure limitation can be done over the maximum provided by the tool unit operating pressure for the power screwdriver.
  • the method according to the invention realizes torque Drehwikelverschraubitch by elongation is carried out by whole strokes of the piston in tools with piston drive.
  • the tool and screw geometry determined the joining moment and the final elongation of the screw connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Claims (10)

  1. Procédé de serrage d'un raccord vissé avec allongement de la vis,
    dans lequel une visseuse à chocs est utilisée, pour laquelle des courses d'un organe de force, en particulier d'un vérin hydraulique, sont transformées en un mouvement rotatif d'un outil de serrage,
    caractérisé en ce que,
    dans une première étape, le raccord vissé est d'abord serré jusqu'à un couple d'assemblage prédéfini, et
    dans une deuxième étape, le serrage du raccord vissé est terminé avec un nombre prédéfini de courses entières de l'organe de force de la visseuse à chocs.
  2. Procédé selon la revendication 1, comprenant les étapes supplémentaires consistant à :
    spécifier un allongement total souhaité,
    déterminer un couple d'assemblage pour atteindre un allongement d'assemblage, qui est dimensionné de telle manière que l'allongement total souhaité peut être atteint par l'allongement d'assemblage et un certain nombre de courses entières de l'organe de force de la visseuse à chocs.
  3. Procédé selon la revendication 1 ou 2, comprenant l'étape supplémentaire consistant à :
    déterminer un angle de rotation généré par une course entière de l'organe de force de la visseuse à chocs utilisée.
  4. Procédé selon l'une des revendications précédentes, comprenant l'étape supplémentaire consistant à :
    déterminer un allongement de la vis utilisée généré par une course entière de l'organe de force de la visseuse à chocs utilisée et/ou par un angle de rotation défini.
  5. Procédé selon la revendication 3 et/ou 4, dans lequel la détermination de l'angle de rotation généré par une course entière de l'organe de force de la visseuse à chocs utilisée et/ou de l'allongement de la vis utilisée généré par une course entière de l'organe de force de la visseuse à chocs utilisée et/ou par un angle de rotation défini est effectuée à l'avance pour le type de visseuse à chocs utilisé et/ou le type de vis utilisé.
  6. Procédé selon l'une des revendications précédentes, dans lequel le couple d'assemblage est compris entre 5 % et 50 % du couple de serrage maximal, de manière avantageuse entre 15 % et 35 % du couple de serrage maximal et est encore de manière avantageuse d'environ 25 % du couple de serrage maximal.
  7. Procédé selon l'une des revendications précédentes, dans lequel le couple de serrage maximal de la visseuse à chocs et/ou la pression maximale, à l'action de laquelle est soumis l'organe de force, est réglé(e) de telle sorte que la dernière course est exécutée entièrement.
  8. Procédé selon l'une des revendications précédente, dans lequel aucune mesure de l'angle de vissage ne se fait par le biais d'un capteur d'angle de rotation et/ou la visseuse à chocs utilisée ne comporte aucun capteur d'angle de rotation.
  9. Procédé selon l'une des revendications précédentes, dans lequel la commande de la visseuse à chocs se fait manuellement ou au moyen d'une simple commande de la spécification du nombre de courses.
  10. Utilisation d'une visseuse à chocs, pour laquelle des courses d'un organe de force, en particulier d'un vérin hydraulique, sont transformées en un mouvement rotatif d'un outil de vissage, dans un procédé de serrage d'un raccord vissé selon l'une des revendications précédentes.
EP10016108.2A 2010-01-08 2010-12-27 Procédé d'enfilage d'une liaison par vissage par allongement de la vis Not-in-force EP2353788B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010004218 2010-01-08
DE102010009712A DE102010009712A1 (de) 2010-01-08 2010-03-01 Verfahren zum Anziehen einer Schraubverbindung unter Längung der Schraube

Publications (3)

Publication Number Publication Date
EP2353788A2 EP2353788A2 (fr) 2011-08-10
EP2353788A3 EP2353788A3 (fr) 2016-03-16
EP2353788B1 true EP2353788B1 (fr) 2017-03-01

Family

ID=44115620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10016108.2A Not-in-force EP2353788B1 (fr) 2010-01-08 2010-12-27 Procédé d'enfilage d'une liaison par vissage par allongement de la vis

Country Status (3)

Country Link
US (1) US8875803B2 (fr)
EP (1) EP2353788B1 (fr)
DE (1) DE102010009712A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102744557A (zh) * 2012-06-27 2012-10-24 武汉亚普汽车塑料件有限公司 汽车油箱螺母盖装配方法
JP6501965B1 (ja) * 2018-12-11 2019-04-17 株式会社東日製作所 ボルト及びナットの締付け方法及び締付け装置
DE102019207211B4 (de) 2019-05-17 2023-01-26 Carl Zeiss Smt Gmbh Verfahren zur Verschraubung von zwei Bauteilen

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Publication number Priority date Publication date Assignee Title
US4037282A (en) * 1976-03-08 1977-07-26 Dahl Norman C Process for creating overload protection against yielding in bolts
DE4331846C2 (de) 1992-09-30 2003-02-20 Volkswagen Ag Verfahren zum Anziehen einer Schraubverbindung
SE501155C2 (sv) * 1993-04-21 1994-11-28 Atlas Copco Tools Ab Impulsmutterdragare
US6782594B2 (en) * 1997-12-30 2004-08-31 Ralph S. Shoberg Method and apparatus for auditing a tension load in the threaded fastener
DE19813900A1 (de) * 1998-03-28 1999-09-30 Frank Hohmann Hydraulisch betriebener Kraftschrauber und Verfahren zu seiner Herstellung
DE60128418T2 (de) * 2000-03-16 2008-01-17 Makita Corp., Anjo Angetriebenes Schlagwerkzeug mit Mitteln zum Ermitteln des Schlaggeräusches
US6843326B2 (en) * 2001-01-29 2005-01-18 Pat Technologies Limited Method and apparatus for determining when a fastener is tightened to a predetermined tightness by a pulse output tightening tool, and a pulsed output tightening tool incorporating the apparatus
DE10137896A1 (de) * 2001-08-02 2003-02-20 Paul-Heinz Wagner Verfahren zur Steuerung eines intermittierend arbeitenden Schraubwerkzeugs
JP4412377B2 (ja) * 2007-09-28 2010-02-10 パナソニック電工株式会社 インパクト回転工具

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2353788A3 (fr) 2016-03-16
DE102010009712A1 (de) 2011-07-14
US20110168418A1 (en) 2011-07-14
EP2353788A2 (fr) 2011-08-10
US8875803B2 (en) 2014-11-04

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