这种钻头是在深孔钻基础上加以改进,用来加工50公斤/厘米~2试压泵的“大轴塞”(如图1)的。原来加工这种深孔的工艺是:先用φ17.2钻头钻孔,然后用浮动镗刀半精加工,最后用多节压刀在压力机上精加工。这种工艺方案虽然能保证工件的技术要求,但是加工周期较 This drill bit is based on deep hole drilling to be improved, used to process 50 kg / cm ~ 2 test pump “big shaft ” (Figure 1). The original processing of such deep-hole process is: first φ17.2 drill bit drilling, and then half-finishing with a floating boring knife, and finally with a multi-section knife in the press finishing. Although this process can guarantee the technical requirements of the workpiece, but the processing cycle more