我厂在加工不同的孔径时,改进了一种镗孔刀杆(如附图),它的特点:结构简单,所以方便,由于减少了装刀的次数,故使辅助时间大大的缩减,因而提高了劳动生产率,消除了单刀加工时测量尺寸的误差,防止了废品。工作方法将刀秆4的四方部份,紧固在车床的方刀架上,它中心线应与机床中心线重合。刀头的调整:当旋转手柄 I plant in the processing of different aperture, the improvement of a boring arbor (as the figure), its features: simple structure, so convenient, due to reduce the frequency of loading the knife, so the auxiliary time greatly reduced, and therefore Improve labor productivity, eliminating the error of measuring the size of single-pole processing, to prevent the waste. Working methods The four parts of the knife stalk 4, fastened to the square knife holder, the center line of the machine should coincide with the center line. Adjustment of the cutter head: When rotating the handle