EP3829817B1 - Schraubvorrichtung, antriebsdrehmomenterzeugungsmittel, verschraubsystem sowie verfahren zur drehmomentsteuerung - Google Patents

Schraubvorrichtung, antriebsdrehmomenterzeugungsmittel, verschraubsystem sowie verfahren zur drehmomentsteuerung Download PDF

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Publication number
EP3829817B1
EP3829817B1 EP19753256.7A EP19753256A EP3829817B1 EP 3829817 B1 EP3829817 B1 EP 3829817B1 EP 19753256 A EP19753256 A EP 19753256A EP 3829817 B1 EP3829817 B1 EP 3829817B1
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EP
European Patent Office
Prior art keywords
torque
value
output
screwing
drive
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
EP19753256.7A
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German (de)
English (en)
French (fr)
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EP3829817A1 (de
Inventor
Thomas Langhorst
Bruno BERGMANN
Achim LÜBBERING
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.)
Johannes Luebbering GmbH
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Johannes Luebbering GmbH
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Publication of EP3829817A1 publication Critical patent/EP3829817A1/de
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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
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically 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
    • B25B17/00—Hand-driven gear-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
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/04—Spanners; Wrenches with rigid jaws of ring jaw type
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/08—Spanners; Wrenches with rigid jaws of open jaw type
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/481—Spanners; Wrenches for special purposes for operating in areas having limited access
    • 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
    • B25B17/00—Hand-driven gear-operated wrenches or screwdrivers
    • B25B17/02—Hand-driven gear-operated wrenches or screwdrivers providing for torque amplification
    • 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
    • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes

Definitions

  • the present invention relates to a screwing device for applying a torque to a screwing partner.
  • the invention relates to a drive torque generating means for generating a torque.
  • the present invention relates to a screwing system, at least comprising a screwing device and a drive torque generating means.
  • the present invention relates to a method for controlling the drive motor of a screwing system.
  • the invention relates to the use of a screwing system for carrying out the method.
  • the document WO 2018/188829 A1 shows a device or a system according to the preambles of claims 1, 3 and 6.
  • Screwing devices are known from practice, in particular from industrial screwing technology, which are referred to, for example, as so-called offset drives and in particular for screwing or assembly work in which the screwing partner (i.e. for example a screw to which a torque is to be applied within the context of the present invention) can only be reached with difficulty or with great effort due to special spatial installation conditions.
  • Flat drives are usually gear units accommodated in a flat housing with a drive usually provided at one end and an output drive provided at the opposite end, on which the screwing partner can then be attached in a suitable detachable manner.
  • the gearbox in the offset output housing often consists of an intermeshing arrangement of gears that meshes and thus transmits torque from the input to the output. however, depending on the area of application, there are different variations and Modifications of this technology, which is generally known and assumed to be generic, are possible and known.
  • offset outputs On the output side, offset outputs have an output gear wheel, which is supported by at least one adjacent gear wheel and can be designed to mesh with it.
  • the output gear serves to transmit the torque to the screwing partner.
  • a distinction must be made between a closed design, in which the screwing partner can only be inserted axially into the output gear, which is provided with a hexagon socket, for example, and an open design, in which the screwing partner also engages with the output gear radially in relation to the axis of rotation of the output gear can come.
  • the output gear wheel is not closed, but has a recess on its circumference in order to be able to accommodate the screw partner in the hexagon socket in the radial direction.
  • the output gear meshes at times with at least two adjacent gears or support gears, so that the output gear is driven by at least one of the two support gears.
  • the output gear wheel thus passes through at least one full support phase, in which it is in mesh with at least two other gears or support gears, and at least one partial support phase, in which fewer gears or support gears mesh than in the full support phase.
  • the output gear meshes with two support gears in the full support phase and one support gear in the partial support phase.
  • the recess of the output gear thus faces that support gear which the output gear just does not mesh with.
  • an adjacent gear wheel is usually sufficient for support and torque transmission, so that the output gear wheel of the closed design only runs through a full support phase during a complete rotation of 360°.
  • the screwing device just described is mostly used in conjunction with a drive torque generation means, which can be designed to generate a torque and to interact with a screwing device.
  • the driving torque generating means can be, for example, a hand-held tool or a straight or straight-angle screwdriver.
  • Such drive torque generation means are mostly used in an industrial context and used in particular in combination with a screwing device to create a satisfactory assembly in special spatial installation conditions in which screwing partners are difficult to reach.
  • the combination of the screwing device and the drive torque generating means can be summarized as a screwing system, it being possible for the two parts to be combined with one another across manufacturers. For example, manufacturers of screwing devices are known which do not sell drive torque generating means and vice versa.
  • Bolting systems with a drive torque generation means and in particular the drive torque generation means comprise a drive motor and possibly a control or regulating unit for the drive motor.
  • This control unit determines, for example, whether the tool is operated either in torque control or in speed control. In speed control, for example, a speed to be maintained and a cut-off torque are specified fixed. The controller then adjusts the torque output by the drive motor accordingly.
  • speed control for example, a speed to be maintained and a cut-off torque are specified fixed.
  • the controller then adjusts the torque output by the drive motor accordingly.
  • An overall efficiency is known, but not the influence of the screwing device on the overall efficiency.
  • the meshing of the at least one adjacent supporting gear wheel has an effect, for example, on a screwing device of the open as well as the closed type, a gear crack, a concentricity error, a toothing error (e.g. damage to the tooth flank), lubrication, a surface quality and/or a state of friction between contacting ones Tooth flanks have a negative effect on the efficiency of the screwing device and thus also of the screwing system.
  • the strong torque variation over one revolution of the output gear wheel also means that, for a given cut-off torque, the output torque of the motor can pass the cut-off torque and the motor can therefore be switched off.
  • the switch-off can be caused by the above-mentioned influences of the geared offset drive that degrade the efficiency and not, as desired, by a tightened screw partner. So it can happen that a screw connection is not tightened up to the desired tightening torque because the motor switches off prematurely. In the worst case, however, a screwing partner that has been tightened as desired is accepted by a user, which can lead to damage and/or considerable safety risks if the screwing partner suddenly loosens.
  • the unevenness in the torque curve means that individual outliers in the torque curve can exceed a defined switch-off limit, which means that the drive motor is switched off before the desired limit torque of the screw connection is reached.
  • switch-off limit means that the drive motor is switched off before the desired limit torque of the screw connection is reached.
  • the object of the present invention is therefore to propose a screwing device, a driving torque generating means, a screwing system, a method and a use which ensure a high-quality screwing, particularly with regard to the design of the screwing device. Furthermore, a screw connection should be able to be designed in such a way that it can be tightened up to a defined limit torque.
  • the invention is based on the knowledge that the aforementioned influences that degrade the degree of efficiency and/or the sluggishness occur cyclically with respect to the full 360° rotation of the output gear wheel. Considerable influences occur during the partial support phase, particularly in the case of an open-type geared offset drive. It was therefore known in which angular position of the driven gear what degree of efficiency is present and which influences have a detrimental effect. Manipulation or compensation of a value of the actual output torque output by the drive motor is provided to ensure uniform operating behavior and/or to prevent the drive motor from being switched off by prematurely reaching a defined limit value, such as the switch-off torque.
  • Compensation data are used for this purpose, which can include a torque curve and/or an efficiency curve, such as are formed during a full 360° rotation of the output gear wheel and/or its passage through the full support phase and partial support phase.
  • the information on the torque behavior or the efficiency of the screwing device can thus be used.
  • a compensation file or the torque curve specific to the output gear wheel, or more precisely its value can be created, for example, by initially measuring the screwing device on a suitable test stand. With the knowledge of the point in time and/or the angle of rotation of the sluggishness, the value of the actual output torque can now be manipulated or a peak in the recorded actual output torque that may exceed the value of the cut-off torque can be compensated take place. Because it is now known at what point in time and/or at what angle of rotation sluggishness occurs, the torque peak caused by the output gear wheel and/or its proportion of the torque peak can be calculated from the value of the actual output torque output by the drive motor.
  • the torque curve specific to the output gear can include, for example, data or values for a full 360° revolution of the output gear or only for at least one angle window or a partial support phase.
  • a screwing device for applying and/or transmitting a torque to a screwing partner and for interacting with a means for generating drive torque, comprising flat output means which have an output which can be detachably connected to the screwing partner and a drive which can be acted upon manually or mechanically with a drive torque have a driven gear, which can be driven by the flat output means, a mechanical interface, for optional direct or indirect connection to the drive torque generating means for introducing the torque, a compensation unit, designed to store and process compensation data, comprising a driven gear-specific torque curve and/or a driven gear-specific Efficiency curve, for offsetting with a value of an actual output torque to generate a value of a compensated output torque, and a data interface, designed to transmit compensation data to a drive torque generating means.
  • the screw device can have an open design, for example. During a complete rotation, the driven gear wheel passes through at least one full support phase, in which it meshes with at least two other gears, and at least one partial support phase, in which fewer gears mesh than in the full support phase.
  • the screwing device can also have a closed design, for example.
  • the screwing device can also be an angle head. An angle head can be arranged between a drive torque generating means and a geared offset head to transmit torque via a power transmission gear.
  • the invention can consequently also be implemented in an angle head, with the flywheel drive means also in an angle head can be referred to as gears or bevel gears for transmitting a torque and the output gear can be referred to as that gear which transmits the torque from the angle head, for example to a flywheel.
  • the screwing device can be connected in a known manner to various suitable drive torque generating means and has at least one own compensation file in order to make it available to the drive torque generating means via the data interface.
  • "Calculation" in the sense of the invention does not directly mean the use of basic arithmetic operations, but rather computer-aided processing.
  • At least one torque detection means is provided for detecting the value of the actual output torque.
  • screwing devices and in particular geared offset drives do not have their own torque detection means.
  • the torque detection means of the screwing device can be a torque sensor. Since screwing devices for screwing are used in combination with a drive torque generation means and the drive torque generation means usually includes its own torque detection means, a torque detection means in a screwing device can in principle be dispensed with. However, such a torque detection means offers the possibility of torque detection in the screwing device itself, so that these data provide precise information about the torque actually present at the output gear wheel or at least provide a clear indication of it.
  • the basic idea according to the invention can also be implemented in a drive torque generating means.
  • the torque detection means By detecting the torque using the torque detection means, the position of the driven gear wheel can be identified at any time by means of a comparison with the compensation data.
  • a compensation according to the invention can be carried out at least in the partial support phase.
  • the torque detection means can be a torque sensor, for example, or else a motor encoder.
  • the drive torque generating means can be connected in a known manner to various suitable screwing devices and can store compensation data for the connected screwing device.
  • a data interface is provided for the transmission of Compensation data is formed.
  • data can be exchanged between the means for generating drive torque and a screwing device connected to it.
  • a single drive torque generation means can carry out compensations according to the invention in a manner according to the invention for each torque of different screw devices that can be connected to the drive torque generation means.
  • one driving torque generating means can be used for various screwing devices.
  • the data can be transmittable wirelessly or by cable, for example.
  • a screw device identification means is provided. Such a means is suitable for clearly identifying the screwing device connected to the drive torque generating means.
  • the identification can take place, for example, via manual input to the drive torque generating means or also automatically when a screwing device is connected.
  • the screwing device can preferably transmit its own identification to the drive torque generating means by means of the data interface.
  • a specific compensation file can be assigned to each identification, which can be called up and used when the identification is recognized.
  • the compensation unit can, for example, store a large number of output gear-specific torque curves or efficiency curves in order to interact with the corresponding different screwing devices in a manner according to the invention.
  • the screw device or the Drive torque generating means provided an angle determining means for determining a position angle of the output gear.
  • an angle determination means for determining a position angle of the output gear.
  • the position of the driven gear or its position angle can be precisely detected, for example in a 360° system, and it can thus be determined in which phase the driven gear is located.
  • it can also be advantageous to identify the screwing device and in particular its transmission ratio.
  • a zero position (0°) or an angular distance from it does not have to be initially specified, since it can be determined.
  • a screwing system is also proposed, at least comprising a screwing device, comprising flat output means which have an output which can be detachably connected to the screwing partner and a drive which can be subjected to a drive torque manually or mechanically, an output gear wheel which can be driven by the flat output means, a mechanical interface, for optional direct or indirect connection to the torque generating means for introducing the torque, as well as a drive torque generation means, which is connected to the flat output means on the drive side, comprising a drive motor, a mechanical interface, designed for optional direct or indirect connection to the screwing device for introducing the torque, a torque detection means for detecting a value of the actual output torque, and a compensation unit, designed for storing and processing compensation data, comprising a torque profile specific to the output gear and/or an efficiency profile specific to the output gear, for offsetting against the value of the actual output torque to produce a compensated output torque value.
  • the screwing system can be designed as a hand-held screwing system and then has such a weight that it can preferably be carried by an operator with one hand. In terms of weight, it is therefore within the framework of legal requirements. However, it can also be designed as a stationary system.
  • this comprises at least one data interface designed to transmit compensation data.
  • data can be sent either between the screwing device and the means for generating drive torque or between the screwing system and an external data point. It is conceivable, for example, to carry out maintenance work on the compensation data or to adapt compensation data.
  • this includes an angle determination means for determining a position angle of the output gear.
  • the method thus realizes the basic idea of the invention.
  • the torque profile specific to the output gear and the efficiency profile specific to the output gear are compensation files.
  • the method according to the invention essentially has the advantages mentioned above, to which reference is hereby made.
  • the calculation includes comparing and/or subtracting and/or adding a compensation file with the value of the actual output torque, preferably exclusively for at least one partial support phase and/or smoothing the value of the actual output torque, preferably exclusively for at least a partial support phase.
  • the increase in torque caused by the screwing device can be manipulated in such a way that it can be represented as non-existent.
  • the to the control unit which, for example, for control and / or Control processes can be formed, output value of the compensated output torque is processed there and processed in a known manner depending on the operating mode (speed control or torque control).
  • the position angle of the output gear can be used for more accurate compensation.
  • this angle for example, in the case of an open screw device, it can be seen at which rotational phases the output gear wheel is in the full support phase or in the partial support phase.
  • the position angle can be specified in a 360° system.
  • a first partial support phase in a first angular window between about the 130th position angle and the 170th position angle and a second partial support phase in a first angular window between about the 190th position angle and the 230th position angle lay.
  • the angle windows are dependent on the specific design of the support gears and their arrangement. With a zero position or a position angle of 0° of the output gear, there is an attachment position in an open screwdriving device, in which the output gear can be attached to a screwing partner.
  • the setpoint speed can ideally be selected so high that the cut-off torque value is not exceeded. Such an embodiment leads to a fast screwing process.
  • the method according to the invention provides for the screwing system to be operated with speed control.
  • Such a mode of operation is customary in particular in an industrial context and advantageously enables the invention to be used there.
  • first partial support phase in a first angle window between about the 130th position angle and the 170th position angle and second partial support phase in a first angle window between about the 190th position angle and the 230th position angle e.g. first partial support phase in a first angle window between about the 130th position angle and the 170th position angle and second partial support phase in a first angle window between about the 190th position angle and the 230th position angle
  • one Part support phase group are formed, which ranges from the 130th position angle to the 230th position angle.
  • a single compensation would therefore be made for this angular window.
  • a use of a screwing system according to claim 7 for carrying out the method according to claim 10 is also proposed.
  • the use according to the invention essentially has the above-mentioned advantages, to which reference is hereby made.
  • the 1 shows a perspective view of a hand-held screwing system with a screwing device 2 for applying a torque to a screwing partner, not shown, having flat output means 6 accommodated in a housing 4 of an open flat output 32.
  • the flat output means 6 are at one end (Output side) designed to interact and to drive a suitable and designed as a slotted output gear 8 screwing tool.
  • the screwing tool 12 has a drive motor 26 (eg electric or pneumatic) and transmits the output torque it generates into the screwing device 2 .
  • Both the screwing device 2 and the screwing tool 12 each have a mechanical interface for either direct or indirect connection Connection to the other of the two partners of the screwing system.
  • such screw devices 2 or flat output means 6 are provided and suitable for transmitting a maximum torque of approximately 250 Nm.
  • Screwing device 2 is designed as an open flat output and is characterized in that the output gear wheel 8 has a recess 62 designed as a slot for radially receiving a screwing partner in a hexagon socket.
  • the screw device shown in the figures can also be designed as a closed geared offset drive. Both designs have identical influences that reduce the degree of efficiency, as mentioned at the outset, the effects of which are equally excluded for both designs by means of the invention.
  • the open design also has an influence on the efficiency during the partial support phase, the effects of which can also be ruled out according to the invention.
  • FIG. 2 shows several flat output means 6 or gears of the screwing device 2 in a plan view with the housing 4 removed, as well as an output gear 8 on the output side Support gear 20.
  • the two support gears 18 and 20 transmit the torque to the output gear 8 through their respective meshing.
  • the gears 8, 14, 16, 18 and 20 are mounted axially parallel to one another and linearly along a longitudinal extension of the housing 4 in this rotatably mounted.
  • a tightening direction of rotation 48 of the output gear wheel 8 is indicated by means of an arrow.
  • the output gear 8 runs through two full support phases and two partial support phases during a full rotation of 360°.
  • the output gear 8 is in engagement with both support gears 18 and 20 .
  • the output gear 8 is only in engagement with one of the two support gears 18, 20.
  • a first full support phase begins at an angular position of 230°, an angular position of 0° and reaches an angular position of 130°.
  • the first partial support phase begins at an angle of 130° and extends to an angle of 170°.
  • the screwing tool 12 includes a start button 22 for operating the screwing tool 12 by an operator.
  • An energy supply and also a control unit 24 are activated by means of the start button 22 .
  • the control unit 24 readjusts, among other things, a torque output by the drive motor 26 by means of signals output to a drive motor 26 .
  • the drive motor 26 can include, for example, a planetary gear, not shown.
  • the drive motor 26 can in turn transmit its position and/or its angle of rotation to the control unit 24 by means of signals.
  • the drive motor 26 outputs an actual output torque, which is detected as a value by a torque sensor 28 serving as torque detection means.
  • the torque sensor 28 transmits the actual output torque detected and output by the drive motor 26 or its value to a compensation unit 30.
  • a torque profile specific to the output gear or an efficiency profile specific to the output gear is stored in the compensation unit 30.
  • the compensation unit 30 is designed, among other things, to offset the value of the actual output torque with the output gear-specific torque curve in order to generate a value of a compensated output torque. In other words, the output gear-caused binding, which is peaked in the value of the output torque actually output, is removed or compensated for.
  • the value of the compensated output torque is then transmitted from the compensation unit 30 to the control unit 24 .
  • the control unit 24 is for comparing the value of the compensated Output torque formed with a cut-off torque, when it is reached by the value of the compensated output torque, the drive motor 26 is switched off.
  • control unit 24 processes the value of the compensated output torque and torque in the same known manner as a value of an actual output torque in a known control loop of an engine control system.
  • the torque output by the drive motor 26 is output to the screwing device 2 via the mechanical interface.
  • the screwing device 2 comprises in 3 shown embodiment the angle head 10 and the gear 6 comprehensive gear output 32, which also includes the output gear 8.
  • the torque is finally transmitted from the output gear 8 to the screwing partner 50 to produce a tight screw connection.
  • the drive torque generation means or the screwing device 2 can comprise a screwing device identification means 34, which provides an identification of, for example, the design, the offset drive means 6, the offset drive 32 and/or the gear ratio can transmit to the screwing tool 12 by cable or wirelessly.
  • a data interface 36 can be used for this purpose, for example in order to transmit compensation data.
  • the screwing device 2 can also include a data interface 36 in order to receive, for example, compensation data from the screwing device 2 and/or to receive data from an external data source or to send it to this.
  • the screwing device 2 can, for example, comprise an angle determination means 40 for determining a position angle of the output gear wheel 8 . This measured angular position value can be transmitted, for example, using one or both of the data interfaces 36 and 38 . This is indicated by an idealized data path 64, which transmits the measured angular position value from the angle head 10 and/or the angle determination means 40 to the control unit 24 for further processing.
  • a screwing device 2 is connected in combination with a screwing tool 12 or a drive torque generating means and at least one full revolution of the output gear wheel 8 is recorded, as the display case 52 shows.
  • the focus here is on the transmitted torque and efficiency.
  • the resulting measurement signal of the torque is in 6 shown.
  • This measurement signal is further processed in a manner not described further in display case 56 and possibly digitized. It is then transmitted via an interface 58 for data transmission to the compensation unit 30, for example, and stored there. However, this measurement signal can also be stored in a suitable memory of the screwing device 2 .
  • FIG. 4 shows the measurement curve recorded within the system boundary 42 of an open offset gear with an output gear 8 meshed with two support gears 18 and 20.
  • the synopsis of the Figures 4 and 5 shows the finding on which the invention is based. It was found that the tightness of the screwing device 2 occurs cyclically. The drive motor 26 attempts to compensate for this sluggishness, for example in the case of speed control, by increasing the output torque output, the peaks in 4 show. This results in the in figure 5 efficiency curve shown, which drops significantly every 360°. The drop in efficiency and the sluggishness coincide in time, so that the conclusion is that a change in the value should mean that a drive motor 26 does not have to react to sluggishness with an increased output torque output, which ultimately leads to improved efficiency.
  • a torque in Newton meters is plotted against an angle of rotation in degrees in a schematically simplified manner.
  • the value of a cut-off torque is represented by a rough dashed line.
  • the value of the output torque actually output is represented by a medium broken line.
  • the value of the output gear-specific torque profile as a compensation file is shown using a fine dashed line.
  • the value of the compensated output torque is represented by a solid line.
  • the drive motor 26 tries to compensate for a sluggishness by outputting an increased output torque - the 6 torque peak shown.
  • the compensation unit 30 offsets the value of the output torque actually output with the value of the torque specific to the output gear wheel.
  • the compensation unit 30 recognizes that a cyclic torque peak occurs in this angle window (130° to 170°)—a clear indication of a torque peak caused by the output gear.
  • the result of this calculation is the value of a compensated output torque shown schematically. This output torque increases regardless of the compensation according to the invention and reaches the cut-off torque at point 44 .
  • the control unit 24 causes the drive motor 26 to be switched off. It is assumed that a screw connection is tight at this point in time.
  • the 9 largely resembles that 8 , which is why only the differences will be discussed below.
  • the drive gear wheel 8 has both a first partial support phase between an angle of rotation of 130° and 170° and a second partial support phase between an angle of rotation of 190° and 230°. Between the two partial support phases there is a full support phase in an angle window of 170° to 190°. The two partial support phases are flanked by another full support phase, which ranges from a rotation angle of 230° to the zero position of 0° and a rotation angle of 130°. The two torque peaks in the partial support phases can now be compensated separately for each partial support phase. However, it is also conceivable to combine the two partial support phases within the full revolution of the output gear wheel 8 into a partial support phase group. A single compensation can now take place in the manner described above for the partial support phase group as a whole.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
EP19753256.7A 2018-08-02 2019-07-23 Schraubvorrichtung, antriebsdrehmomenterzeugungsmittel, verschraubsystem sowie verfahren zur drehmomentsteuerung Active EP3829817B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018118853.6A DE102018118853A1 (de) 2018-08-02 2018-08-02 Schraubvorrichtung, Antriebsdrehmomenterzeugungsmittel, Verschraubsystem sowie Verfahren zur Drehmomentsteuerung
PCT/EP2019/069841 WO2020025402A1 (de) 2018-08-02 2019-07-23 Schraubvorrichtung, antriebsdrehmomenterzeugungsmittel, verschraubsystem sowie verfahren zur drehmomentsteuerung

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SE544996C2 (en) * 2021-12-08 2023-02-21 Atlas Copco Ind Technique Ab Socket for power tool, methods of controlling power tools, control systems and power tools
DE102022113988A1 (de) 2022-06-02 2023-12-07 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Ermittlung einer wenigstens einen Betriebsparameter eines Schraubwerkzeugs im Rahmen eines Schraubprozesses steuernden Arbeitsregel

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MX2021000844A (es) 2021-06-15
WO2020025402A1 (de) 2020-02-06
KR102612187B1 (ko) 2023-12-08
CA3107554A1 (en) 2020-02-06
JP2022510535A (ja) 2022-01-27
US20210316427A1 (en) 2021-10-14
KR20210035266A (ko) 2021-03-31
EP3829817A1 (de) 2021-06-09
DE102018118853A1 (de) 2020-02-06
BR112020026832A2 (pt) 2021-04-06
CN112533731A (zh) 2021-03-19
JP2024010225A (ja) 2024-01-23
CN112533731B (zh) 2023-06-27

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