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    • 9. 发明授权
    • Control method and control unit for impact type screw fastening device
    • 冲击式螺丝紧固装置的控制方法和控制单元
    • US07770658B2
    • 2010-08-10
    • US11920162
    • 2006-05-10
    • Takaya ItoYoshitsugu ShibataHitoshi Takamura
    • Takaya ItoYoshitsugu ShibataHitoshi Takamura
    • B23B23/14
    • B25B23/1475B23P19/066B25B23/1405
    • An object is to improve accuracy of tightening torque and to shorten time necessary for fastening a screw in an impact type screw fastening device that uses an electric motor as a rotation driving source. A control method for the impact type screw fastening device that uses an electric motor as a rotation driving source includes the steps of driving the motor to rotate by supplying current to the motor intermittently so that torque exerted on a load by rotation of the motor becomes like pulses on the time axis, and controlling the current of every time of each pulse so that an increment of every time of each pulse of the torque after the torque reaches a target approach torque TQN that is a first set value becomes smaller than that before it reaches the target approach torque TQN.
    • 目的是提高紧固扭矩的精度,并缩短将螺钉紧固在使用电动机作为旋转驱动源的冲击式螺丝紧固装置中所需的时间。 使用电动机作为旋转驱动源的冲击式螺钉固定装置的控制方法包括通过向电动机间歇地供给电流来驱动电动机旋转的步骤,使得通过电动机的旋转施加在负载上的转矩变得类似 脉冲在时间轴上,并且控制每个脉冲的每次的电流,使得扭矩之后的扭矩的每个脉冲的每次的增量到达作为第一设定值的目标接近扭矩TQN变得小于其之前 达到目标逼近扭矩TQN。