在加工具有平行轴线的数个孔的零件时,通常使用摇臂钻床,它能灵活地摇动主轴带着钻套钻夹到达相应的轴线上。但摇臂钻床价格贵,因而加工该零件时往往由较便宜的立式钻床来完成。但为了使钻套中心与机床主轴旋转中心相重合,钻具必须同被加工零件一起沿机床床台位移。此时钻具不固 In the machining of parts with several holes parallel to the axis, a radial drilling machine is usually used, which flexibly rocks the main shaft with the drill-bit clamp to the corresponding axis. However, the radial drilling machine is expensive, so machining of the part is often done by cheaper vertical drilling machines. However, in order for the center of the drill chuck to coincide with the center of rotation of the machine spindle, the tool must be displaced along the machine bed along with the machined part. At this point the drill is not solid