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    • 2. 发明授权
    • Control method for an impact wrench
    • US11465263B2
    • 2022-10-11
    • US16090880
    • 2017-03-29
    • Hilti Aktiengesellschaft
    • Christian WoetzlDario BrallaMatthaeus Alberding
    • B25B21/02B25B23/147
    • A control method includes two operating modes carried out in response to a position of a selector switch. The first operating mode provides: carrying out first impacts of the hammer onto the anvil; detecting the event of an impact of the hammer onto the anvil with an impact sensor; detecting an angular position of the anvil with an angle sensor; estimating an individual impact angle of the anvil due to the last detected impact, based on the angular position of the anvil before the last detected impact and the angular position of the anvil after the last detected impact, and comparing the individual impact angle with an individual impact setpoint angle. The first operating mode is ended when the individual impact angle drops below an individual impact setpoint angle. The second operating mode provides: detecting the angular position of the anvil with the angle sensor as the initial position; carrying out second impacts of the hammer onto the anvil; and detecting a relative rotation angle of the anvil with respect to the initial position during the second impacts. The second operating mode is ended when the relative rotation angle exceeds a standard angle.
    • 3. 发明申请
    • CONTROL METHOD FOR A MACHINE TOOL AND A MACHINE TOOL
    • 机床和机床的控制方法
    • US20150151419A1
    • 2015-06-04
    • US14407422
    • 2013-05-29
    • Hilti Aktiengesellschaft
    • Dario Bralla
    • B25D11/06B25D11/04
    • B25D11/064B25D11/04B25D2250/035B25D2250/195B25D2250/221H01F7/1615H01F7/1844H01F2007/1692H02K7/145H02K33/12H02K2213/03
    • A machine tool and control method are disclosed. The machine tool has a tool receptacle which supports a chiseling tool so that it is movable along an axis of movement. A magneto-pneumatic striking mechanism has a primary drive, which is arranged around the axis of movement, and has a first magnetic coil and a second magnetic coil. On the axis of movement within the magnetic coils, the striking mechanism has a striker and riveting head. Furthermore, the striking mechanism has a pneumatic spring which acts on the striker. The control method provides for a pressure sensor which measures the prevailing pressure in the pneumatic spring during a movement of the striker in the direction opposite the striking direction. A controller initiates an acceleration phase at the start of a drop in pressure in the pneumatic spring. The primary drive accelerates the striker in the striking direction during the acceleration phase.
    • 公开了一种机床和控制方法。 该机床具有一个工具插座,该工具插座支撑一个凿子工具,使其能够沿一个移动轴线移动。 磁气击打机构具有围绕运动轴线布置的主驱动器,并具有第一磁线圈和第二磁线圈。 在磁性线圈内的移动轴上,打击机构具有撞针和铆接头。 此外,打击机构具有作用在撞针上的气动弹簧。 该控制方法提供了一种压力传感器,该压力传感器在冲击器沿与撞击方向相反的方向运动期间测量气动弹簧中的主要压力。 控制器在气动弹簧的压力下降开始时启动加速阶段。 在加速阶段,主驱动器在撞击方向加速撞击。