EP3856462B1 - Procédé de contrôle ou de régulation d'une machine-outil portatif - Google Patents

Procédé de contrôle ou de régulation d'une machine-outil portatif Download PDF

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Publication number
EP3856462B1
EP3856462B1 EP19769113.2A EP19769113A EP3856462B1 EP 3856462 B1 EP3856462 B1 EP 3856462B1 EP 19769113 A EP19769113 A EP 19769113A EP 3856462 B1 EP3856462 B1 EP 3856462B1
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EP
European Patent Office
Prior art keywords
torque
rotation
screwing means
power tool
unit
Prior art date
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Active
Application number
EP19769113.2A
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German (de)
English (en)
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EP3856462A1 (fr
Inventor
Arne CHRIST
Heiko Roehm
Dietmar Saur
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP3856462A1 publication Critical patent/EP3856462A1/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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the DE 100 01 459 B4 discloses a power tool, in particular a drill or screwdriver, with an actuating switch for applying a motor voltage dependent on the desired speed to a drive motor with stator and armature and with a device for switching the direction of rotation of the drive motor, wherein an angular position of a brush bridge holding carbon brushes is changed and the polarity of the stator field is reversed.
  • the WO 2011/122695 A1 discloses a method according to the preamble of claim 1 and an electronic pulse screwdriver with a motor, a hammer, an anvil, a tool holder, a power supply unit and a control unit.
  • the control unit controls a flow of an electric current through the motor.
  • EP 3 170 624 A1 describes a control method of a machine tool for rotating tools.
  • a tool holder is continuously rotated in a forward direction about a working axis by means of a rotary drive when an operating button is pressed.
  • the continuous rotation in the forward direction is interrupted by a protective method when a protective device detects that the tool holder is blocked.
  • WO 2016/195899 A1 discloses a machine tool and a method for controlling the machine tool with a motor, a coupling sleeve with a plurality of settings, a wireless transceiver for wireless connection to an external device, and a processor coupled to the wireless transceiver and the coupling sleeve.
  • the EP 2 338 646 A2 describes a hand-held rotating machine tool with an electric motor for driving a rotating tool, a sensor device for detecting a blockage of the tool and a control device which, in response to a blockage detected by the sensor device, reverses a direction of rotation of the electric motor before the blockage for a predetermined period of time and immediately thereafter causes the electric motor to rotate in the direction of rotation again.
  • the invention is based on the object of improving a method for controlling or regulating a hand-held power tool using simple design measures.
  • a hand-held power tool can tighten or screw in a screwing means in a particularly advantageous manner.
  • the hand-held power tool can be prevented from jamming on the screwing means, so that an operator of the hand-held power tool is prevented from separating the hand-held power tool from the screwing means.
  • an operator of a hand-held power tool can work particularly reliably and efficiently.
  • the method according to the invention particularly comprises applying a torque to a screwing means.
  • a torque is applied to the screwing means in a first direction of rotation in order to tighten the screw, for example, to a desired depth or a desired torque.
  • the screwing means can be tightened in such a way that the hand-held power tool, in particular a torque transmission area of the hand-held power tool, jams with the screwing means.
  • Jamming can be caused by elastic deformation and subsequent bracing of the hand-held power tool, in particular the torque transmission area of the hand-held power tool, relative to the screwing means and is particularly promoted by increasing wear of the hand-held power tool, in particular the torque transmission area.
  • Releasing the bracing can be very complicated and time-consuming and, not least, can be accompanied by damage to the hand-held power tool due to excessive loads on the hand-held power tool in the radial direction to an output axis. An additional tool may also be required to release the jamming.
  • the screwing means can be subjected to a second torque, which acts in a second direction of rotation opposite to the first direction of rotation.
  • the second torque can be applied in the second direction of rotation to easily release a connection between the hand-held power tool, in particular the torque transmission area of the hand-held power tool, and the screwing means.
  • An opposite direction of rotation represents in particular a direction which acts opposite to a reference direction of rotation considered around an axis of rotation, such as a left-hand rotation relative to an axis of rotation when the reference direction of rotation corresponds to a right-hand rotation relative to the axis of rotation.
  • the first direction of rotation can be clockwise.
  • the second direction of rotation can be anti-clockwise.
  • the first direction of rotation and the second direction of rotation must be opposite to each other.
  • the jamming should be released while avoiding a reduction in a tightening torque or a target torque of the screwing device in the first direction of rotation.
  • the torque transmission area can be designed as a screwdriver bit that can be coupled to an output unit of the hand-held power tool.
  • the screwdriver bit can be designed as a socket wrench attachment.
  • the screwdriver bit can have a hexagonal cross-section.
  • screwdriver bits with a square cross-section, octagonal cross-section or another cross-section would also be conceivable.
  • the screwdriver bit can be designed to surround the screwing means in a coupled state by 360° at least in one plane.
  • the torque transmission area can be provided on the output unit of the hand-held power tool.
  • the screwdriver bit can be designed as a nut, in particular as a hexagonal nut.
  • a change from a first torque to a second torque is made by reversing the direction of rotation.
  • the reversal of the direction of rotation can by means of a method deemed appropriate by a person skilled in the art, such as by means of an electrical control of a drive unit or a clutch.
  • the direction of rotation can be reversed by an operator of the hand-held power tool operating a direction of rotation switch.
  • the hand-held power tool can have an impact mechanism, in particular a rotary impact mechanism, which is intended to ensure an impact operation, in particular a rotary impact operation, of the hand-held power tool.
  • the hand-held power tool can thereby generate a rotary impact pulse which can be transmitted to the screwing means.
  • an axial and/or radial impact pulse can be provided to release the jamming of the screwing device.
  • the first torque and/or the second torque can be applied to the screwing means at least partially by means of a first torque pulse and/or a second torque pulse. It is understood that there can be a plurality of torque pulses.
  • the torque pulses can be periodic.
  • the torque pulses can have a pulse frequency of between 0.1 and 100 Hz.
  • the torque pulses can form torque shocks in the circumferential direction or in the first direction of rotation and/or in the second direction of rotation.
  • the torque pulses can form a short-term and pulse-like torque that acts on the screwing means.
  • a screwing-in process of the screwing means can have several torque pulses.
  • the hand-held power tool is designed as a drill driver or as an impact wrench. It goes without saying that other hand-held power tools that appear to be useful to a person skilled in the art can also be considered.
  • the hand-held power tool preferably has a drive unit.
  • the drive unit is intended to generate a movement, in particular a To transmit rotary movement to an output unit, in particular a torque transmission area.
  • the method may include applying a single or a plurality of first torque pulses to the screwing means in the first direction of rotation.
  • the torque pulses in the first direction of rotation can be provided to set the screwing means in rotation and preferably to screw the screwing means into a workpiece.
  • a screwing-in process of a screwing means can have several, in particular downstream, torque pulses, which are provided to connect or screw the screwing means to the workpiece.
  • the torque pulses can be provided to support a screwing-in process of a screwing means by, for example, making the screwing-in process of the screwing means easier when higher torques or target torques are to be applied to the screwing means.
  • more than two, in particular more than three, preferably more than four, preferably more than five, particularly preferably more than 50, more preferably more than 100, more particularly preferably more than 1000 torque pulses can be provided. This allows the screwing means to be screwed into a workpiece particularly reliably.
  • the method may include applying a single or a plurality of second torque pulses to the screwing means in the second direction of rotation.
  • a single or two second torque pulses can be provided which act in the second direction of rotation.
  • more than two second torque pulses can be provided which act in the second direction of rotation.
  • the second torque/angular pulse can take place in the second direction of rotation after or immediately after the end of the first torque/angular pulse or the screwing process in the first direction of rotation.
  • the screwing means can be The screwing process can be decoupled from the hand-held power tool in a particularly simple manner. This allows pulse energy to be used in a particularly advantageous manner to enable the special technical effect.
  • a number of torque pulses may be adjustable in the first and/or second direction of rotation.
  • the second torque in particular torque pulse
  • the second torque can be applied to the screwing means in the second direction of rotation as a function of an actuation, in particular an activation or deactivation, of an actuating element for controlling or regulating a drive unit of the hand-held power tool.
  • the actuating element is provided to control or regulate the drive unit.
  • the drive unit can be controlled or regulated in such a way that the output unit applies the first torque to the screwing means in the first direction of rotation.
  • the drive unit can be controlled or regulated in such a way that the output unit applies the second torque to the screwing means in the second direction of rotation, in particular before the drive unit is deactivated due to the deactivation of the actuating element.
  • a pressed actuating element can be provided to tighten or screw in the screwing means.
  • a released or non-pressed actuating element can be provided to reverse a direction of rotation, in particular to apply a second torque to the screwing means in the second direction of rotation.
  • a released actuating element can be provided to apply a second torque to the screwing means that acts in the opposite direction to the first torque.
  • the actuating element can, for example, be Completion of the screwing process.
  • the screwing device can be subjected to the second torque, in particular a torque pulse, in the second direction of rotation depending on a kick-back activation, reaching a target torque in the first direction of rotation and/or eClutch activation.
  • the screwing device can be subjected to the second torque, in particular a torque pulse, or the direction of rotation can be reversed depending on a rotation angle covered, a torque, a pulse and/or a current strength. This allows a jam to be released in a particularly simple and/or automated manner.
  • the second torque in particular a torque pulse
  • the screwing means is preferably applied with the second torque in the second direction of rotation after each actuation process or screwing process of the hand-held power tool in order to avoid such jamming.
  • the method comprises providing a first target torque for limiting the application of the first torque, in particular torque pulse, to the screwing means in the first direction of rotation.
  • the first torque and/or the first target torque can be detected electronically, for example by means of at least one sensor unit of the hand-held power tool.
  • the torque could be measured by means of a physical quantity, such as energy, in particular a current, by means of which the drive unit is operated.
  • the first target torque should form an assembly torque, which in particular represents a target state of the screwing means.
  • the screwing means should be subjected to a first torque in the first direction of rotation until the first target torque is reached. This allows ensure that the specified tightening torques of the screwing device are not exceeded.
  • the method comprises applying the second torque, in particular a torque pulse, to the screwing means in the second direction of rotation as a function of, in particular, reaching the first target torque in the first direction of rotation.
  • the screwing means can be subjected to a torque in a second direction of rotation when or after the screwing means has reached or exceeded the first target torque with the first torque in the first direction of rotation.
  • the direction of rotation can be switched to prevent jamming by applying a second torque to the screwing means in the second direction of rotation.
  • the direction of rotation can be switched electronically by means of an electronic switching unit. For example, the polarity of the drive unit can be reversed. This can prevent jamming after each screwing process.
  • the second torque in particular torque pulse
  • the second torque may be expedient for the second torque, in particular torque pulse, to be able to be activated or deactivated in the second direction of rotation, in particular by means of a switch button or an external device. It is thus possible to deactivate or activate, in particular mechanically, whether the second torque should be applied to the screwing means in the second direction of rotation. This allows an operator to activate a function that releases a jam if necessary.
  • the drive unit can be switched off if the screwing means is to be rotated for a duration of longer than 1 s, in particular longer than 2 s, preferably longer than 3 s, more preferably longer than 4 s, preferably longer than 5 s, and/or less than 10 s, in particular less than 8 s, preferably less than 5 s, and/or less than 3 s, in particular less than 1 s, preferably less than 0.1 s, with the second torque in the second direction of rotation.
  • s stands for seconds.
  • the method further comprises providing a second target torque for limiting the application of the second torque, in particular torque pulse, to the screwing means in the second direction of rotation.
  • the second target torque is intended in particular to form a maximum second torque, in particular torque pulses, acting on the screwing means in the second direction of rotation.
  • the second target torque can be adjustable in particular as a function of the first torque in the first direction of rotation. This allows application-specific values to be set.
  • the second torque, in particular torque pulse may be smaller than the first torque, in particular torque pulse.
  • the first target torque in the first direction of rotation should be greater than the second target torque in the second direction. This can prevent a screw connection from being loosened when the screwing means is subjected to the second torque in the second direction of rotation.
  • the second torque, in particular torque pulse is smaller than the first torque, in particular torque pulse, by up to 95%, in particular by up to 90%, preferably by up to 80%, preferably by up to 70%, particularly preferably by up to 50%.
  • the second torque, in particular torque pulse is smaller than the first torque, in particular torque pulse, by at least 50%, in particular by at least 60%, preferably by at least 70%, preferably by at least 80%. It goes without saying that the second torque can also be greater than the first torque in an alternative embodiment. This makes it particularly easy to prevent the handheld power tool from jamming relative to the screwing means.
  • the first target torque in particular torque pulse
  • the second target torque in particular torque pulse
  • the second target torque represents the first torque or the first torque after the direction of rotation has been reversed.
  • the second target torque, in particular torque pulse deviates from or is smaller than the first target torque, in particular torque pulse, by up to 50%, in particular by up to 40%, preferably by up to 30%, preferably by up to 20%, particularly preferably by up to 10%, and/or by at least 10%.
  • a twisting movement in the second direction of rotation takes place with a twisting angle of up to 20°, in particular up to 15°, preferably up to 10°, preferably up to 8°, particularly preferably up to 5°.
  • the twisting angle ⁇ is greater than 1°, in particular greater than 2°, preferably greater than 5°, preferably greater than 8°, particularly preferably greater than 10°.
  • a twisting movement can be understood as a movement of the output unit, in particular the torque transmission unit, relative to the screwing means.
  • a corresponding joining play of the output unit, in particular the torque transmission unit, relative to the screwing means can be used to enable a rotary movement of the output unit, in particular the torque transmission unit, in the second direction of rotation without loosening the screwing means with a second torque.
  • a play of the output unit, in particular the torque transmission area, relative to the screwing means in the second direction of rotation can be used in a particularly reliable manner.
  • the invention further relates to a hand-held power tool, according to the preamble of patent claim 13, for carrying out the method.
  • the hand-held power tool may have a communication unit for receiving data from an external device and for setting the data of the hand-held power tool.
  • the communication unit can be provided to control or regulate the drive unit wirelessly.
  • the communication unit can have a first communication module which is arranged on or in an actuating unit or the actuating element.
  • the communication unit can have a second communication module which is arranged on or in the drive unit. It goes without saying that the second communication module is connected to the electronic unit.
  • the electronic unit can be provided to control or regulate the drive unit.
  • the electronic unit can be connected to the second communication module, in particular electrically or by means of electrical lines.
  • it can be expedient for the hand-held power tool to have at least one communication unit for communicating with at least one external unit for exchanging electronic data at least for controlling or regulating the drive unit.
  • the communication unit is preferably designed as a wireless communication unit.
  • the communication unit can be designed as a WLAN communication unit, as a Bluetooth communication unit, as a radio communication unit, as an RFID communication unit, as an NFC unit, as an infrared communication unit, as a mobile network communication unit or the like.
  • the electronic unit is particularly preferably provided to control or regulate the drive unit and/or safety functions depending on an actuation of the actuation unit and depending on electronic data transmitted to the electronic unit by means of the communication unit.
  • the communication unit is particularly preferably provided for bidirectional data transmission.
  • the communication unit is designed as a wired communication unit, such as a LAN communication unit, a USB communication unit or the like.
  • the external unit is preferably designed as a smartphone that has an app for communicating with the communication unit.
  • the external unit can be used as an external, portable actuation unit, as a permanently installed actuation unit at an operator's workstation, as a synchronization unit permanently installed in a room at a site of use that can be controlled from a central office, for example as a result of company specifications/safety regulations, as a Operator body parameter monitoring unit, as an external sensor unit or as another central or decentralized operating unit, input station and/or central or decentralized terminal that appears useful to a specialist.
  • This can advantageously enable synchronization of electronic data.
  • the hand-held power tool is put into operation in a synchronization mode, for example by plugging in a rechargeable battery device, plugging in a power supply cable or by activation by an operator, a connection is established between the communication unit and the external unit, at least partially automatically.
  • Settings stored in the external unit can therefore preferably be transferred directly to the hand-held power tool.
  • These can be individual settings of an operator, such as a desired, rapid start-up to a set speed and maximum power and/or specifications of a company, such as compliance with a safety function in a specified area of a company premises or a place of use, etc.
  • the figures each relate to a hand-held power tool 101 with a receiving unit 103 for receiving insert tools (not shown), such as screwdriver bits designed as a hexagon socket for screwing screws into a workpiece.
  • the receiving unit 103 has a clamping device 105 known to a person skilled in the art, which is intended to hold the insert tool in or on the hand-held power tool 101.
  • the hand-held power tool 101 is designed in particular as a cordless screwdriver, in particular as a cordless drill driver or as a cordless impact wrench.
  • Fig.1 shows the handheld power tool 101 with a drive unit 13, in particular a drive shaft (not shown), for transmitting a movement to an output unit 14, in particular an output shaft (not shown) of the output unit 14.
  • the drive unit 13 is in particular intended to transmit a movement of the drive unit 13 to an insert tool (not shown).
  • the drive unit 13 has an electric motor 13 designed as an electronically commutated DC motor.
  • the output unit 14 comprises the receiving unit 103 and the clamping device 105.
  • the handheld power tool 101 has a machine housing that is at least partially designed as a handle housing 15, which forms an outer housing 17 of the handheld power tool 101.
  • the handle housing 15 is intended to be grasped by a hand of an operator of the handheld power tool 101.
  • the hand-held power tool 101 further comprises an interface unit 19 with a holding unit 21, which can be detachably attached to a battery unit 23.
  • the holding unit 21 is provided to hold the battery unit 23 in a fastening state connected to the hand-held power tool 101.
  • the machine housing 15 further comprises an actuating element 25 for switching an on/off switch 25 on the drive unit 13 on and off and a gear unit (not shown) preferably designed as a planetary gear.
  • the transmission unit comprises at least two gears that can be switched, for example, by means of a shift button 29.
  • the hand-held power tool 101 further comprises a rotary impact mechanism (not shown in detail) which is intended to apply rotary impact pulses to the screwing means in order to screw in the screwing means.
  • a rotary impact mechanism (not shown in detail) which is intended to apply rotary impact pulses to the screwing means in order to screw in the screwing means.
  • the machine housing 15 further comprises a holding unit 21, which at least partially forms an outer housing 17.
  • the machine housing 15 is essentially made of plastic.
  • the machine housing 15 is formed from a shell construction.
  • the holding unit 21 delimits the handheld power tool 101 from a side of the handle housing facing away from the drive unit 13.
  • the holding unit 21 is made of metal.
  • the holding unit 21 is designed as a holding clip 21.
  • the battery unit 23 is connected to the handheld power tool 101 in a fastening state, so that there is electrical contact between the battery unit 23 and the drive unit 13 of the handheld power tool 101 when the battery unit 23 is connected to the interface unit 19.
  • the battery unit 23 supplies the handheld power tool 101 with electrical energy.
  • At least the battery pack 23, the drive unit 13, the on/off switch 25 and the electronics unit 37 are electrically connected by means of lines 43.
  • the handheld power tool 101 further comprises a mechanical clutch unit 115 for coupling the drive shaft of the drive unit 13 to the output shaft of the output unit 14.
  • the clutch unit 115 comprises at least one slip clutch.
  • the clutch unit 115 can be coupled to the gear unit.
  • the clutch unit 115 can be designed as an adjustable torque clutch by means of which a torque can be manually adjusted. For example, a maximum torque of 100 Nm or 200 Nm or 1000 Nm can be set in order to cover a preferred torque range of 0.1 to 20 Nm, so that in particular the clutch unit 115 is placed in an over-locking state when this torque is exceeded.
  • the hand-held power tool 101 has an electronic unit 37 which is designed to control the drive unit 13.
  • the electronic unit 37 can detect the torque directly by means of an acceleration sensor provided for this purpose and/or indirectly, for example by measuring the current intensity of the drive unit 13, which is essentially proportional to the torque of the drive unit 13.
  • the electronic unit 37 has a computing unit such as a microcontroller for reading out and/or processing the torque and the direction of rotation.
  • the hand-held power tool 101 is intended to carry out a method for controlling or regulating a hand-held power tool 101, in particular a screwdriver, comprising at least the steps described below ( Fig.3 ).
  • step 201 the method is started and in a further step 203 it is optionally checked whether a rotary impact function is activated, so that if the rotary impact function is activated, step 205 is handled and if the rotary impact function is deactivated, step 207b is handled.
  • the rotary impact function is activated in step 205.
  • the rotary impact function cannot be deactivated when using a rotary impact wrench, so steps 203 and 205 are omitted.
  • the screwing means 129 is subjected to a first torque, in particular a torque pulse, in a first direction of rotation.
  • the screwing means 129 should preferably be tightened until a first target torque or an assembly torque is reached.
  • actuation state of the actuating element such as an activated or deactivated actuating element, or a functional state of the hand-held power tool, such as kick-back activation, reaching a target torque, eClutch, etc.
  • the first torque is applied to the screwing means 129 in the first direction of rotation in order to tighten the screw, for example, to a desired depth or a desired torque.
  • the torque transmission area 131 is designed as a screwdriver socket, which can be coupled to an output unit of the hand-held power tool.
  • the screwdriver socket has an internal hexagon cross-section and the screw head has an external hexagon cross-section. It goes without saying that a Torx bit and a Torx screw, hexagon bit and internal hexagon screw can also be used.
  • a direction of rotation of the drive unit is reversed and in step 211 the screwing means 129 is subjected to a second torque, in particular a torque pulse, in a second direction of rotation opposite to the first direction of rotation.
  • the release of the jam should be carried out while avoiding a reduction of the first target torque or the assembly torque of the screwing means 129 in the first direction of rotation, so that it is ensured that the screwing means does not come loose.
  • the first direction of rotation is clockwise.
  • the second direction of rotation is counterclockwise.
  • the first direction of rotation and the second direction of rotation are opposite to each other.
  • the application of the first torque and/or the second torque to the screwing means 129 can be carried out at least partially by means of a first torque pulse and/or a second torque pulse. It is understood that the torque pulses can be present in a plurality.
  • a number of torque pulses in the first and/or second direction of rotation is adjustable, so that it is possible to adjust how many torque pulses are to be applied to the screwing means 129.
  • the application of the second torque, in particular torque pulse, to the screwing means 129 in the second direction of rotation can take place depending on an actuation, in particular an activation or deactivation, of an actuating element 25 for controlling or regulating a drive unit of the hand-held power tool 101.
  • the actuating element 25 is provided to control or regulate the drive unit, so that a pressed actuating element 25 is provided to tighten or screw in the screwing means 129.
  • the application of the second torque, in particular torque pulse, to the screwing means 129 in the second direction of rotation takes place depending on an activation of a rotary impact function of the hand-held power tool 101, since the risk of jamming is high, in particular when using a rotary impact function, so that the hand-held power tool 101 preferably applies the second torque to the screwing means 129 in the second direction of rotation after each actuation process or screwing process of the hand-held power tool 101.
  • the rotary impact function can be set in step 203, so that when the rotary impact function is activated, steps 205 to 215 are processed.
  • the first target torque is adjustable so that the first target torque is provided to limit the application of the first torque, in particular torque pulse, to the screwing means 129 in the first direction of rotation.
  • the first torque and/or the first target torque can be detected electronically, for example by means of at least one sensor unit of the hand-held power tool 101.
  • the torque could be measured by means of a drive current strength by means of which the drive unit is operated.
  • the method can comprise applying the second torque, in particular a torque pulse, to the screwing means 129 in the second direction of rotation depending on, in particular, reaching the first target torque in the first direction of rotation.
  • the screwing means 129 can be subjected to a torque in a second direction of rotation when or after the screwing means 129 has reached or exceeded the first target torque with the first torque in the first direction of rotation, so that the direction of rotation is switched after the first target torque has been reached or exceeded.
  • the second torque, in particular torque pulse, in the second direction of rotation can be activated or deactivated by means of a switch button or an external device 119.
  • the method can further regulate a provision of a duration of the second torque, in particular torque pulse, acting on the screwing means 129 in the second direction of rotation, so that the drive unit is switched off if the screwing means 129 is subjected to the second torque in the second direction of rotation for a duration of up to 5 s.
  • the method comprises providing a second target torque for limiting the application of the second torque, in particular torque pulse, to the screwing means 129 in the second direction of rotation.
  • the second target torque can be adjustable in particular as a function of the first torque in the first direction of rotation.
  • the first target torque should be smaller in the first direction of rotation than the second target torque in the second direction.
  • the second target torque, in particular torque pulse is up to 90% and at least 70% smaller than the first target torque, in particular torque pulse.
  • the second target torque, in particular torque pulse can deviate from the first target torque, in particular torque pulse, by up to 30% and at least 10%.
  • the drive unit can exhibit a twisting movement by a twisting angle ⁇ in the second direction of rotation of up to 15°.
  • a twisting angle ⁇ can be greater than 2°.
  • step 215 the method or the tightening process is terminated.
  • the handheld power tool 101 further comprises a communication unit 117 for receiving data from an external device 119 and for setting the data of the handheld power tool 101.
  • the communication unit 117 is provided for wirelessly controlling or regulating the drive unit.
  • the communication unit 117 has a first communication module which is arranged on or in the external device 119.
  • the communication unit 117 has a second communication module which is arranged on or in the hand-held power tool
  • the second communication module is connected to the electronic unit 37.
  • the electronic unit 37 is provided to control or regulate the drive unit.
  • the electronic unit 37 is connected to the second communication module, in particular electrically or by means of electrical lines.
  • the handheld power tool 101 has at least one communication unit 117 for communication with at least one external unit for an exchange of electronic data at least for controlling or regulating the drive unit.
  • the communication unit 117 is preferably designed as a wireless communication unit 117.
  • the communication unit 117 is designed as a Bluetooth communication unit 117.
  • the electronic unit 37 is particularly preferably provided to control or regulate the drive unit and / or safety functions of the handheld power tool 101 depending on an actuation of the actuation unit and depending on electronic data transmitted to the electronic unit 37 by means of the communication unit 117.
  • the external unit is preferably designed as a smartphone that has an app for communication with the communication unit 117. In the external Settings stored in the unit can therefore preferably be transferred directly to the hand-held power tool 101.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (14)

  1. Procédé permettant de commander ou de réguler une machine-outil à main (101), en particulier une visseuse, de préférence une visseuse à percussion rotative, présentant au moins les étapes suivantes consistant à :
    - solliciter un moyen de vissage (129) par un premier couple, en particulier une impulsion de couple, dans un premier sens de rotation, et
    - fournir un premier couple de consigne pour limiter une sollicitation du moyen de vissage (129) par le premier couple, en particulier l'impulsion de couple, dans le premier sens de rotation, et
    - solliciter le moyen de vissage (129) par un deuxième couple, en particulier une impulsion de couple, dans un deuxième sens de rotation opposé au premier sens de rotation,
    caractérisé en ce que le procédé présente l'étape suivante consistant à :
    - fournir un deuxième couple de consigne pour limiter une sollicitation du moyen de vissage (129) par le deuxième couple, en particulier l'impulsion de couple, dans le deuxième sens de rotation.
  2. Procédé selon la revendication 1, caractérisé par une sollicitation du moyen de vissage (129) par une ou plusieurs premières impulsions de couple dans le premier sens de rotation.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé par une sollicitation du moyen de vissage (129) par une ou plusieurs deuxièmes impulsions de couple dans le deuxième sens de rotation.
  4. Procédé selon l'une quelconque des revendications 2 à 3, caractérisé par un réglage d'un nombre d'impulsions de couple dans le premier et/ou le deuxième sens de rotation.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la sollicitation du moyen de vissage (129) par le deuxième couple, en particulier l'impulsion de couple, dans le deuxième sens de rotation a lieu en fonction d'un actionnement, en particulier d'une activation ou d'une désactivation, d'un élément d'actionnement (25) pour commander ou réguler une unité d'entraînement de la machine-outil à main (101).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la sollicitation du moyen de vissage (129) par le deuxième couple, en particulier l'impulsion de couple, dans le deuxième sens de rotation a lieu en fonction en particulier d'une activation d'une fonction de percussion rotative de la machine-outil à main (101).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé par une sollicitation du moyen de vissage (129) par le deuxième couple, en particulier l'impulsion de couple, dans le deuxième sens de rotation en fonction en particulier du fait que le premier couple de consigne soit atteint dans le premier sens de rotation.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une sollicitation du moyen de vissage par le deuxième couple, en particulier l'impulsion de couple, dans le deuxième sens de rotation, peut être activée ou désactivée en particulier au moyen d'un interrupteur ou d'un appareil externe (119).
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé par une fourniture d'une durée du deuxième couple agissant sur le moyen de vissage (129), en particulier de l'impulsion de couple, dans le deuxième sens de rotation.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le deuxième couple, en particulier l'impulsion de couple, est inférieur par rapport au premier couple, en particulier à l'impulsion de couple.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le deuxième couple de consigne, en particulier l'impulsion de couple, dévie, en particulier est inférieur, par rapport au premier couple de consigne, en particulier à l'impulsion de couple, de jusqu'à 95 %, en particulier de jusqu'à 40 %, de préférence de jusqu'à 30 %, de préférence de jusqu'à 10 %.
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé par un mouvement de rotation dans le deuxième sens de rotation avec un angle de rotation (ϕ) de jusqu'à 20°, en particulier de jusqu'à 15°, de préférence de jusqu'à 8°, de manière particulièrement préférée de jusqu'à 5°.
  13. Machine-outil à main, comprenant une unité d'entraînement (13) qui est prévue pour transmettre un mouvement à une unité de sortie (14), et une unité électronique (37) qui est prévue pour commander ou réguler l'unité d'entraînement (13), caractérisée en ce que l'unité électronique (37) est configurée pour exécuter un procédé selon l'une quelconque des revendications précédentes.
  14. Machine-outil à main selon la revendication 13, caractérisée par une unité de communication (117) pour recevoir des données d'un appareil externe (119) et pour régler les données de la machine-outil à main (101).
EP19769113.2A 2018-09-28 2019-09-11 Procédé de contrôle ou de régulation d'une machine-outil portatif Active EP3856462B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018216702.8A DE102018216702A1 (de) 2018-09-28 2018-09-28 Verfahren zur Steuerung oder Regelung einer Handwerkzeugmaschine
PCT/EP2019/074185 WO2020064330A1 (fr) 2018-09-28 2019-09-11 Procédé de contrôle ou de régulation d'une machine-outil portatif

Publications (2)

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EP3856462A1 EP3856462A1 (fr) 2021-08-04
EP3856462B1 true EP3856462B1 (fr) 2024-04-17

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US (1) US11697194B2 (fr)
EP (1) EP3856462B1 (fr)
CN (1) CN112752633B (fr)
DE (1) DE102018216702A1 (fr)
WO (1) WO2020064330A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3501740A1 (fr) * 2017-12-20 2019-06-26 HILTI Aktiengesellschaft Procédé de pose pour raccord à vis au moyen de clé à percussion
EP3928925A1 (fr) * 2020-06-22 2021-12-29 Hilti Aktiengesellschaft Machine-outil doté d'un outil en forme de disque et procédé de fixation ou de libération de l'outil

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175231B (en) * 1985-04-02 1989-06-21 Compair Power Tools Threaded bush setting tool
IT1238264B (it) * 1990-03-02 1993-07-12 Trapano avvitatore.
DE10001459B4 (de) 2000-01-15 2008-08-21 Metabowerke Gmbh Elektrowerkzeuggerät mit Drehrichtungsumschalter
DE102006017193A1 (de) 2006-04-12 2007-10-25 Robert Bosch Gmbh Verfahren zum Anziehen einer Schraubverbindung und Schraubwerkzeug
JP5376392B2 (ja) * 2008-02-14 2013-12-25 日立工機株式会社 電動工具
DE102009054762A1 (de) * 2009-12-16 2011-06-22 Hilti Aktiengesellschaft Steuerungsverfahren für eine handgeführte Werkzeugmaschine und Werkzeugmaschine
US9950417B2 (en) * 2010-03-31 2018-04-24 Hitachi Koki Co., Ltd. Power tool
JP5936302B2 (ja) * 2010-12-28 2016-06-22 日立工機株式会社 電動工具
DE102014108398B4 (de) * 2014-06-13 2016-12-08 Techway Industrial Co., Ltd. Elektrisches Nietmutterwerkzeug
EP4029652A1 (fr) * 2015-06-02 2022-07-20 Milwaukee Electric Tool Corporation Outil électrique à vitesses multiples avec embrayage électronique
EP3170624A1 (fr) 2015-11-17 2017-05-24 HILTI Aktiengesellschaft Procédé de commande de machine-outil
CN106896763B (zh) * 2015-12-17 2020-09-08 米沃奇电动工具公司 用于配置具有冲击机构的电动工具的系统和方法
JP6869739B2 (ja) * 2017-02-09 2021-05-12 株式会社マキタ インパクト工具

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WO2020064330A1 (fr) 2020-04-02
CN112752633A (zh) 2021-05-04
US11697194B2 (en) 2023-07-11
US20210370483A1 (en) 2021-12-02
CN112752633B (zh) 2023-11-03
EP3856462A1 (fr) 2021-08-04
DE102018216702A1 (de) 2020-04-02

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