135柴油机重要零件凸轮轴长油孔(φ20×1000)的加工,多年来一直是我厂机工车间的一道极待解决的技术难关。过去在C630车床上用接长柄麻花钻加工该道工序、劳动强度大,工作效率低,而且废品率和刀具损耗率又高,曾一度影响了生产。在《工业学大庆》的群众运动中,凸轮轴小组的工人师付们在车间党支部的支持和兄弟 135 diesel engine important parts camshaft long hole (φ20 × 1000) of processing, over the years has been my plant mechanic workshop a difficult problem to be solved. In the past in the C630 lathe with long handle twist drill processing of this procedure, labor-intensive, low efficiency, and rejection rate and tool loss rate was high, once affected the production. In the mass movement of Daqing in the industry, the camshaft group of workers assigned their support and brother