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    • 69. 发明授权
    • Electromagnetic base drill with intermittent feed
    • 具有间歇进料的电磁基钻机
    • US5087157A
    • 1992-02-11
    • US644525
    • 1991-01-23
    • Michihiro ShojiOsamu Asano
    • Michihiro ShojiOsamu Asano
    • B23B45/02B23B47/18B23B47/20B23B47/34B23Q5/28B23Q15/013
    • B23Q15/013B23Q5/28G05B2219/45129G05B2219/49047Y10T408/165Y10T408/17Y10T408/23Y10T408/554
    • The states of contact switches are switched when a mode switch is turned on. If the drilling operation is effected by means of a drill motor in this state, an oscillation signal which is repeatedly set to "H" and "L" in a preset period corresponding to an output of an oscillator is supplied to the control terminal of a firing pulse generator. The firing pulse generator interrupts supply of the control signal to the control terminal of a triac in the above preset period based on the oscillation signal supplied to the control terminal thereof to interrupt supply of an AC power source from a commercial AC power source to a bridge-type rectifier so as to intermittently drive a feed motor which is energized by an output of the rectifier in the above preset period. As a result, the drill motor can be intermittently fed towards a to-be-worked object by means of the feed motor, and, when the feeding operation is interrupted, a cutting operation can be instantaneously stopped and swarf can be cut apart.
    • 当模式开关打开时,接触开关的状态被切换。 如果在这种状态下通过钻头电机进行钻孔操作,则在与振荡器的输出相对应的预设时段内被重复设置为“H”和“L”的振荡信号被提供给控制端 点火脉冲发生器。 触发脉冲发生器基于提供给其控制端的振荡信号中断在上述预设周期内向三端双向可控硅开关元件的控制端供给控制信号,以中断从商用AC电源向桥的供电 以在上述预设期间间歇地驱动由整流器的输出通电的馈电电动机。 结果,可以通过进给电动机将钻孔电机间歇地送向待加工物体,并且当进给操作中断时,可以立即停止切割操作并切割切屑。