WO2019121754A1 - Procédé de mise en place d'un assemblage vissé au moyen d'une visseuse à percussion - Google Patents

Procédé de mise en place d'un assemblage vissé au moyen d'une visseuse à percussion Download PDF

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Publication number
WO2019121754A1
WO2019121754A1 PCT/EP2018/085610 EP2018085610W WO2019121754A1 WO 2019121754 A1 WO2019121754 A1 WO 2019121754A1 EP 2018085610 W EP2018085610 W EP 2018085610W WO 2019121754 A1 WO2019121754 A1 WO 2019121754A1
Authority
WO
WIPO (PCT)
Prior art keywords
phase
screw connection
torque
impact
screw
Prior art date
Application number
PCT/EP2018/085610
Other languages
German (de)
English (en)
Inventor
Matthaeus ALBERDING
Dario BRALLA
Antonio Orvieto
Original Assignee
Hilti Aktiengesellschaft
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 Hilti Aktiengesellschaft filed Critical Hilti Aktiengesellschaft
Publication of WO2019121754A1 publication Critical patent/WO2019121754A1/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
    • 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
    • B25B23/147—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
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B31/00—Hand tools for applying fasteners

Definitions

  • the present invention relates to a setting method for screw connection, which is implemented as a control method for an impact wrench.
  • steel plate-shaped components are connected with a screw.
  • the components are only limited plan to each other, whereby a normalized fastening is difficult. It is therefore intended that by hand the screw is tightened with a torque wrench. However, the user may forget about manual tightening or improper use.
  • One embodiment of a control method for an impact wrench for tightening a threaded fastener executes a sequence of successive phases in response to a push-button operation.
  • an impact mechanism of the impact wrench repeatedly applies rotary impacts to the screw connection and an estimating device estimates a torque transmitted by the rotary impact to the screw connection.
  • the first phase is terminated when the estimated transmitted torque exceeds a predetermined threshold for the screw connection.
  • a predetermined number of turns is applied to the screw connection or the screw connection is rotated by a predetermined angle of rotation.
  • a check routine is executed which estimates a rotation angle F and terminates the sequence when the rotation angle F exceeds an upper limit.
  • One embodiment of a control method of an impact wrench for tightening a threaded fastener executes a sequence of successive phases in response to a push-button operation.
  • a striking mechanism of the impact wrench repeatedly applies rotational shocks to the screw connection, wherein the first phase is terminated when the estimated transmitted torque exceeds a predetermined threshold for the screw connection.
  • a second phase will a predetermined number of turns for the screw on the screw exercised.
  • An estimation routine estimates a course of a rotation angle F over time. A pattern is fitted to the gradient and the default number is set based on the fitted pattern.
  • Fig. 1 an impact wrench
  • Fig. 2 is an input element
  • Fig. 3 is an expansion anchor
  • Fig. 5 is a graph of the estimated torque
  • Fig. 6 is a screw connection of two steel plates
  • Fig. 7 is a screw connection of two steel plates
  • the impact wrench 1 schematically illustrates the impact wrench 1.
  • the impact wrench 1 has an electric motor 2, a striking mechanism 3 and an output spindle 4.
  • the impact mechanism 3 is continuously driven by the electric motor 2.
  • the percussion mechanism 3 repeatedly applies rotational impulses (rotational strokes) to the output spindle 4 with a short-term but very high torque.
  • the output spindle 4 rotates accordingly continuously or stepwise about a working axis 5.
  • the electric motor 2 can be powered by a battery 6 or mains powered.
  • the impact wrench 1 has a handle 7, by means of which the user can hold and guide the impact wrench 1 during operation.
  • the handle 7 may be rigid or secured by means of damping elements on a machine housing 8.
  • the electric motor 2 and the striking mechanism 3 are arranged in the machine housing 8.
  • the electric motor 2 is switched on and off by means of a button 9.
  • the button 9 is for example arranged directly on the handle 7 and operable by the hand surrounding the handle.
  • the exemplary striking mechanism 3 has a hammer 10 and an anvil 11.
  • the hammer 10 has claws 12 which rest in the direction of rotation on jaws 13 of the anvil 11.
  • the hammer 10 may transmit continuous torque or momentary angular momentum to the anvil 11 via the jaws 12.
  • a coil spring 14 biases the hammer 10 toward the anvil 11, thereby holding the hammer 10 in engagement with the anvil 11. If the torque exceeds the threshold, the hammer 10 shifts against the force of the coil spring until the claws 12 are no longer in engagement with the anvil 11.
  • the electric motor 2 can accelerate the hammer 10 in the direction of rotation until the hammer 10 is again forced into engagement with the anvil 11 by the helical spring 14.
  • the kinetic energy gained in the meantime is transmitted by the hammer 10 to the anvil 11 in a short moment.
  • One embodiment provides that the hammer 10 is forcibly guided on a drive spindle 15 along a helical path 16.
  • the positive guidance can be realized, for example, as a helical depression in the drive spindle 15 and a pin of the hammer 10 engaging in the depression.
  • the drive spindle 15 is driven by the electric motor 2.
  • the output spindle 4 protrudes from the machine housing 8.
  • the protruding end forms a tool holder 17.
  • the exemplary tool holder 17 has a square cross section.
  • a socket 18 or similar tool can be plugged onto the tool holder 17.
  • the socket 18 has a socket with a square hollow cross-section, which substantially corresponds in its dimensions to the tool holder 17.
  • the socket opposite the socket 18 has a mouth 20 for receiving the screw head 21, ie the hexagonal nut 22 or an analog screw.
  • the socket 18 may be secured by means of a tool lock 23 on the output spindle 4.
  • the tool lock 23 is based for example on a pin which is inserted through both a bore in the output spindle 4 and in the socket 18.
  • the impact wrench 1 has a control unit 24.
  • the control unit 24 may be realized, for example, by a microprocessor and an external or integrated memory 25. Instead of a microprocessor, the control unit can be realized from equivalent discrete components, an ASIC, an ASSP,
  • the impact wrench 1 has an input element 26, via which the user can select an operating mode.
  • the control unit 24 then controls the impact wrench 1 according to the selected operating mode.
  • the control sequences of the various operating modes may be stored in the memory 25.
  • the operating modes include, among other things, a setting method for expansion anchors and setting methods for screw connections in steel construction.
  • the input element 26 may include, for example, a display 27 and one or more input buttons 28.
  • the control unit 24 can display the various operating modes stored in the memory 25 and, if appropriate, associated connection types. The user can select the operating mode by means of the input key 28. In addition, the user can enter specifications such as size, diameter, length, setpoint torque, load capacity or manufacturer designation of a connection type.
  • the impact wrench 1 has a communication interface 29, which communicates with an external input element 30.
  • the external input element 30 may be, for example, a mobile phone, a laptop or analogue mobile device.
  • the input element may be an additional module which can be arranged as an adapter between impact wrench 1 and battery 6.
  • connection types are stored or the application can query them via a mobile radio interface from a server.
  • the external input element 30 may represent the expansion anchors or relevant information of the connection type on a display 31.
  • the user selects a connection type via an input key 32 or a touch-sensitive display 31.
  • the external input element 30 transmits the type designation or parameters of the selected connection type relevant to the control method to the impact wrench 1 via a communication interface 33 to the communication interface 29 of the impact wrench 1.
  • the communication interface 29 is preferably radio-based, eg using a Bluetooth standard.
  • the internal input element 28 or the external input element 30 may be provided with a camera 34 which can detect a bar code on a packaging of the type of connection.
  • the input element 28 determines the connection type based on the detected bar code and that in the memory 25 deposited bar codes.
  • a camera 34 a laser-based bar code reader, an RFID reader, etc. may be used to detect a label on the package or on the type of connection.
  • an image processing in the input element 28 can recognize the connection type based on an image captured by the camera 34, or at least delimit a selection of connection types presented to the user based on the image.
  • Fig. 3 shows an expansion anchor 35 which anchored in a wall 36 attaches an attachment 37 to the wall 36.
  • the expansion anchor 35 has an anchor rod 38. At one end of the anchor rod 38 is a screw head 21. At a screw head 21 remote from the end of a spreading mechanism 39 is provided.
  • the spreading mechanism 39 is inserted into a borehole in the wall 36. A tensile stress acting on the spreading mechanism 39 by the screw head 21 is translated by the spreading mechanism 39 into a radial clamping force against the inner wall of the borehole.
  • the expansion anchor 35 acts self-locking, since an increasing tensile load on the expansion anchor 35 through the attachment 37 leads to a higher clamping force.
  • the expansion anchor 35 is pretensioned during setting by means of the screw head 21.
  • the expansion anchor 35 is specified with a desired torque with which the screw head 21 is to be tightened when setting.
  • a manual setting operation of the expansion anchor 35 provides the following.
  • a borehole is drilled in the wall 36 according to the specifications of the expansion anchor 35.
  • the specification specifies the diameter of the borehole, which is equal to the outer diameter of the spreading mechanism 39.
  • the spreading mechanism 39 is driven into the borehole, typically with hammer strokes.
  • the attachment 37 is positioned on the screw head 21.
  • the screw head 21 is tightened manually by means of a torque wrench.
  • the torque wrench When tightening the screw head 21 is supported indirectly via the attachment 37 on the wall 36 along the anchor rod 38, whereby the tension is generated.
  • the screw head 21 is then released again, for example, to align the attachment 37.
  • the user subsequently tightens the screw head 21 again with the torque wrench and the same specified setpoint torque.
  • multiple expansion anchors 35 are necessary to secure the attachment 37.
  • the user may first bias each of the expansion anchors 35 slightly before the expansion anchors 35 are attracted to the target torque accordingly.
  • the user can be interrupted when tightening a Spreizankers 35, whereupon the user hopefully continues the process later with the torque wrench.
  • the spreading mechanism 39 is based, for example, on a sleeve 40 and a cone 41 on the anchor rod 38.
  • the sleeve 40 is opposite the cone 41 along the anchor rod 38 movable.
  • the anchor rod 38 has a thinner cylindrical neck 42 which surrounds the sleeve 40.
  • An inner diameter of the sleeve 40 is greater than the outer diameter of the neck 42.
  • the outer diameter of the lateral surface decreases from a value greater than the inner diameter of the sleeve 40 to a value less than the inner diameter of the sleeve 40.
  • the specified diameter of the borehole corresponds to the outer diameter of the Sleeve 40, which is why this adheres or rubs against the inner wall of the borehole.
  • the cone 41 may be conical, wavy, pyramid-shaped.
  • An essential aspect of the operation is the coefficient of friction of the sleeve 40 on the inner wall.
  • the sleeve 40 is typically made of a steel or other iron-based material.
  • the wall 36 is made of a mineral construction material, eg concrete or natural stone.
  • the screw head 21 can consist of an external thread 43 on the anchor rod 38 and a nut 22 mounted on the external thread 38.
  • the nut preferably has a hexagonal circumference.
  • the anchor rod 38 may have an internal thread into which a screw is inserted.
  • the screw has a head which protrudes radially beyond the anchor rod 38.
  • the head of the screw has a hexagonal circumference.
  • the impact wrench 1 implements a setting method for the expansion anchor 35; Operating mode "expansion anchor” (Fig. 4).
  • the setting method is suitable with the expansion anchor 35 to attach an attachment 37 to a wall 36.
  • the user drills the wellbore into the wall 36 and pushes the expansion anchor 35 into the wellbore.
  • the impact wrench 1 is characterized by generating a repetitive rotary with short-term and high torque.
  • the user selects the operating mode "expansion anchor" by means of the input element 28 and indicates the type of the expansion anchor 35.
  • control unit 24 can be deactivated; reduce its functionality to the mere inspection of the button 9 and the input element 28 et cetera.
  • the setting process begins. If necessary, the impact wrench 1 is awakened from standby mode. In a preparatory phase, it can be checked whether the user has previously selected an expansion anchor 35 by means of one of the input elements 28. If a corresponding selection has not yet been made and the control parameters are not set, the user is stopped and the impact wrench 1 remains inactive. Otherwise, the electric motor 2 is connected to the power supply.
  • the button 9 By pressing the button 9 typically begins a pre-phase, which will not be explained in the following description.
  • the torque M exerted by the impact wrench 1 will be so small that the impact mechanism will not deploy and the impact wrench 1 will continue to apply a typically increasing torque.
  • the first phase S1 of the setting process begins with the first stroke of impact wrench 1 (time t0).
  • a highly schematic profile 44 of the torque M is shown in FIG. 5.
  • the torque M exerted by the output spindle 4 is estimated.
  • the first phase S1 is terminated by default when the estimated torque M exceeds a threshold MO (C1).
  • the threshold value MO is typically lower than the setpoint torque M9 for the expansion anchor 35.
  • the electric motor 2 rotates the drive spindle 15 preferably at a predetermined first speed D1.
  • the control unit 24 can, for example, the rotational speed D of the drive spindle 15 directly with a rotary sensor 45 on the drive spindle 15 or indirectly via a rotary sensor on the electric motor. 2 determine.
  • the first rotational speed D1 is one of the control parameters associated with the expansion anchor 35. The speed has an influence on the output from the impact wrench 1 torque.
  • the hammer 10 detaches from the anvil 11 after a rotational stroke and is accelerated by the drive spindle 15 until the next rotary impact on the anvil 11. The next twist occurs when the hammer 10 is again aligned with the anvil 11.
  • the angle of rotation dF by which the output spindle 4 rotates due to the rotary stroke, is determined.
  • the output torque M corresponds to the transmitted angular momentum and the angle of rotation dF, about which the output spindle 4 rotates due to the rotation.
  • the output torque M is estimated.
  • a characteristic field can be stored, which assigns a pairing of speed D and rotation angle dF torque M or a torque describing size.
  • the angle of rotation dF is determined by a sensor 46 in the impact wrench 1.
  • the sensor 46 for example, directly detect the rotational movement of the output spindle 4 with a rotation sensor 47.
  • the rotation sensor 47 can detect marks on the output spindle 4 inductively or optically.
  • the sensor 46 may estimate the rotational angle dF of the output spindle 4 based on the rotational movement of the drive spindle 15 between two consecutive rotational strokes.
  • the drive spindle 15 rotates between the two rotational strokes by the angular distance of the claws 12, for example 180 degrees, and if the anvil 11 has rotated, in addition to the rotation angle dF of the output spindle 4.
  • the rotational shocks are detected by a rotary impact sensor 48.
  • the sensor 46 detects the angle of rotation of the drive spindle 15 in the time span between two directly successive rotational strokes.
  • the beginning and the end of the period are detected by detecting the rotational strokes by means of a rotary impact sensor 48.
  • the rotary impact sensor 48 may, for example, the increased short-term vibration associated with the rotational shock in the Capture impact wrench 1.
  • the vibration is compared, for example, with a threshold, the beginning or the end corresponds to the time of exceeding the threshold.
  • the torque sensor 48 may also be based on an acoustic microphone or infrasonic microphone that detects a peak in volume.
  • Another variant of a rotary speed sensor 48 detects the power consumption or a rotational speed fluctuation of the electric motor 2.
  • Impact wrench 1 determines the rate of change w during the first phase S1 and compares the rate of change w with a limit value w0.
  • the rate of change w is preferably averaged over a plurality of spins or a time window t, which typically extends over a plurality of spins. If the limit value wO is exceeded, the impact wrench 1 ends the first phase S1.
  • the limit value w0 is another of the control parameters associated with the expansion anchor 35.
  • the limit value wO can be stored as a rate of change.
  • the Rate of change w can also be detected by means of a predetermined time window DT and a predetermined threshold value M2 of the torque M to be reached within the time window DT.
  • the time window DT starts with the first beat t0. If the torque M exceeds the threshold value M2 within the time window DT, the first phase S1 is ended when the threshold value M2 is exceeded. Accordingly, the time window DT and the threshold value M2 are stored.
  • the so prematurely ended first phase S1 is followed by a modified phase S2b.
  • the modified phase S2b is substantially equal to the second phase S2.
  • the impact wrench 1 exerts a predetermined number N2 of turns.
  • the number N2 is significantly lower than in the second phase S2.
  • the number N2 is less than half the number N1, e.g. less than a third of the number N1.
  • a significantly lower additional torque is applied to the expansion anchor 35, as is the case in the standard second phase S2.
  • the modified second phase S2 is thus significantly shorter than the standard second phase S2. As far as a relaxation phase S3 is provided, this connects to the modified second phase S2b.
  • the rate of change w can also be monitored during the second phase S2. If the rate of change w exceeds the predetermined threshold w0, the second phase S2 is terminated prematurely and the method continues with the modified second phase S2b.
  • the user may intentionally or accidentally release the button 9 during the setting process.
  • the electric motor 2 stopped immediately or at least disconnected from the power supply.
  • the setting process is thus aborted.
  • the control method logs in the memory 25 the achieved set state. In particular, it is recorded in the memory 25 which of the three phases of the setting process has been reached. Thereafter, the impact wrench 1 can go into the standby mode SO.
  • the control method stores in the log the number of already executed drafts.
  • the predetermined number N of laps is reduced by the number of laps stored in the log.
  • the relaxation phase S3 optionally follows.
  • the control method stores in the protocol the already executed duration of the relaxation phase S3 in the event of an abort.
  • the already executed duration is read from the memory 25 and deducted from the predetermined duration.
  • the user inserts the threaded rods 55 through the aligned eyes 53. Subsequently, the nut 56 is placed. For a manual attachment, the user will tighten the nut 56 with a torque wrench until a specified torque specified for the screw connection is achieved.
  • the specification is specified by the manufacturer of the bolted joint or specified in relevant steel construction standards.
  • the setpoint torque ensures that the screw connection can not come loose under load, in particular vibrations.
  • the threaded rod 55 should not be unnecessarily stressed, or in the worst case during the tightening of the nut 56 permanently damaged.
  • the impact wrench 1 breaks off the setting process and alerts the user to the missing or incomplete preparatory step.
  • the user selects the operating mode "steel construction" and specifies the type of screw connections 52.
  • Each type of screw 52 is associated with several control parameters, which are necessary for the subsequent proper sequence of the setting process.
  • the control parameters are stored in the memory 25 to the type.
  • the control unit 24 reads out the corresponding control parameters.
  • the control parameters are preferably maintained until the user selects another type of threaded connection 52. Selecting the screw connection
  • the retroactive torque of the screw 52 may be so low that the hammer mechanism 3 is not activated. This pre-phase will not be described further below.
  • the first phase S11 of the setting process begins the first beat of the percussion mechanism 3.
  • the torque M exerted by the output spindle 4 is estimated.
  • the first phase S11 is terminated by default when the estimated torque M exceeds a threshold MO.
  • the threshold MO is typically less than the setpoint torque M9 for the threaded connection 52.
  • the estimation of the torque M is as described in connection with the phase S1 of tightening an expansion anchor.
  • the necessary control parameters are stored in the memory 25 for the screw 52.
  • the test routine C11 estimates the angle of rotation F of the screw connection starting from the first beat (time t0).
  • a course 57 of the angle of rotation F over time is compared with stored control parameters for the screw connection 52.
  • the angle of rotation F is preferably averaged from a plurality of measuring points.
  • FIG. 8 illustrates the profile 57 of the angle of rotation F.
  • the essentially stepwise increasing angle of rotation F can in practice only be detected with a strong noise.
  • the rate of increase of the angle of rotation F can be measured for each type of screw 52 from experimental series.
  • the course is essentially determined by the elastic behavior of the screw 52.
  • the construction elements 50, 51 - as far as lying flat on one another - have only a small influence on the course.
  • the control parameters describe an upper limit 58, which must not exceed the angle of rotation F during tightening. Exceeding the upper limit 58 is recognized as a non-planar superimposition.
  • the check routine causes a cancel S13 of the setting process.
  • the upper limit 58 is preferably not a fixed value but a value increasing with time or with the number of beats.
  • the check routine is preferably activated with the first beat at time t0.
  • the check routine is preferably terminated after a predetermined time DT, for example, the check routine is terminated at the end of the first phase S11.
  • the upper limit 58 can be determined for various screw connections 52, in particular different diameters of the screws, by means of test series.
  • An alternative setting method "Steel Structure II" passes through the first phase S11 and the second phase S12 as described above.
  • the number N8 of the rotational strokes for the second phase S12 is not predetermined, but is derived from the course 59 of the rotational angle F during the previous setting process.
  • An estimation routine S14 compares the course 59 of the rotation angle F over time t with a set of patterns 60 (FIG. 10).
  • the patterns 60 are typical courses of the angle of rotation F determined by test series when tightening screw connections 52 in steel construction.
  • the estimation routine S14 determines the pattern 60 closest to the current profile 59.
  • the pattern 60 is assigned the number N8 of the rotational strokes for the second phase S12 in a look-up table.
  • Fig. 10 shows an example of a course 59 in which the construction elements 51 lie flat on one another.
  • the example patterns 60 have three sections: a beginning 61, a middle 62 and an end 63.
  • the beginning has a linear course with a first slope.
  • the end has a linear course with a second slope, which is less than the first slope.
  • the center 62 is described, for example, by an exponential function with monotonically decreasing slope. Alternatively, the center may be described by other functions with continuously monotonically decreasing slope, e.g. Exponential function, hyperbola.
  • the transitions between the sections are preferably smooth.
  • the pattern has four to six degrees of freedom.
  • the estimation routine S14 preferably records the rotation angle F over the time t, starting with the first impact tO, in order to obtain measurement points for the comparison.
  • a measuring point includes the measured angle of rotation F and the associated time t.
  • the angle of rotation F can be estimated based on the angle of rotation of the drive spindle 15 between successive turns.
  • a time recording can be approximated by a chronological recording of the rotation angle F.
  • the measuring points can be stored in a buffer.
  • the estimation routine S14 adapts the pattern 60 to the measurement points. For a meaningful result of the adaptation, this is preferably carried out after a minimum number of lashes. It also proves to be advantageous to perform the adaptation at the beginning of the second phase S12, ie when the estimated torque M exceeds a threshold value MO.
  • the adaptation can be carried out repeatedly, as long as this allows the computing power of impact wrench 1.
  • the estimation routine S14 is executed only once.
  • the determined pattern 60 provides information about the elastic behavior of the screw connection 52. Based on the elastic behavior, the number N8 of necessary rotational strikes for the second phase S12 can be derived. In one embodiment, associated values for N8 are stored for the patterns 60. Instead of a look-up table, an algorithm can determine from the numbers the set number N8. As soon as the estimation routine S14 has determined the setpoint number N8 of the rotational strokes for the second phase S12, the target number N8 for the second phase S12 is determined. The setting method counts from the change from the first phase S11 to the second phase S12, the number of applied rotary strikes. Once the number N8 is reached, the setting process is ended. The beginning of the second phase S12 is preferably before setting the desired number N8.
  • the change from the first phase S11 to the second phase S12 is based on an estimate of the retroactive torque M. This estimate is subject to a significant measurement error.
  • One embodiment determines, based on the pattern 60, with which rotary impact 64 the threshold value MO has been exceeded.
  • the previously made change from the first phase S11 to the second phase S12 may have occurred at a different rotation than the rotary impact 64.
  • the estimation routine S14 may adjust the target number N8 according to the deviation.

Abstract

L'invention concerne un procédé de commande d'une visseuse à percussion destinée au serrage d'un assemblage vissé, ledit procédé assurant l'exécution d'une séquence de phases successives en réaction à l'actionnement d'une touche. Au cours d'une première phase, un mécanisme de percussion de la visseuse à percussion exerce à plusieurs reprises des roto-percussions sur l'assemblage vissé, un dispositif d'évaluation assurant l'évaluation du couple transmis à l'assemblage vissé par la roto-percussion. La première phase s'achève lorsque le couple transmis évalué dépasse une valeur seuil prédéfinie pour le goujon d'ancrage à expansion. Au cours d'une deuxième phase, un nombre de roto-percussions prédéfini pour l'assemblage vissé est exécuté sur l'assemblage vissé. Au cours de la première phase est exécutée une routine de vérification, laquelle permet l'évaluation d'un angle de rotation (Φ) et l'interruption de la séquence lorsque l'angle de rotation (Φ) dépasse une limite supérieure.
PCT/EP2018/085610 2017-12-20 2018-12-18 Procédé de mise en place d'un assemblage vissé au moyen d'une visseuse à percussion WO2019121754A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17208771.0A EP3501741A1 (fr) 2017-12-20 2017-12-20 Procédé de pose pour raccord à vis au moyen de clé à percussion
EP17208771.0 2017-12-20

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WO2019121754A1 true WO2019121754A1 (fr) 2019-06-27

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Publication number Priority date Publication date Assignee Title
DE102019211303A1 (de) * 2019-07-30 2021-02-04 Robert Bosch Gmbh Verfahren zur Erkennung eines Arbeitsfortschrittes einer Handwerkzeugmaschine

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Publication number Priority date Publication date Assignee Title
EP2305432A2 (fr) * 2009-10-01 2011-04-06 Hitachi Koki CO., LTD. Outil de frappe rotatif
JP2012035358A (ja) * 2010-08-05 2012-02-23 Toyota Motor Corp 打撃式締め付け工具
EP2985117A1 (fr) * 2014-08-12 2016-02-17 HILTI Aktiengesellschaft Procéde optimisé pour une ancre extensible
EP3115154A1 (fr) * 2014-03-04 2017-01-11 Panasonic Intellectual Property Management Co., Ltd. Outil rotatif à percussion
WO2017174415A1 (fr) * 2016-04-04 2017-10-12 Hilti Aktiengesellschaft Procédé de commande d'une clé à choc

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2305432A2 (fr) * 2009-10-01 2011-04-06 Hitachi Koki CO., LTD. Outil de frappe rotatif
JP2012035358A (ja) * 2010-08-05 2012-02-23 Toyota Motor Corp 打撃式締め付け工具
EP3115154A1 (fr) * 2014-03-04 2017-01-11 Panasonic Intellectual Property Management Co., Ltd. Outil rotatif à percussion
EP2985117A1 (fr) * 2014-08-12 2016-02-17 HILTI Aktiengesellschaft Procéde optimisé pour une ancre extensible
WO2017174415A1 (fr) * 2016-04-04 2017-10-12 Hilti Aktiengesellschaft Procédé de commande d'une clé à choc

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