To indicate axial travel of the boring bar,the counting assembly is formed with two counting gears that mesh with two drive gears and a differential,and a special counter.
钻杆轴向进给由钻杆和丝杆相对转动产生,为实现钻杆进尺计数,设计的计数装置由2个与传动齿轮啮合的计数齿轮、一个圆锥齿轮差速器和一个专门设计的计数器组成。
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