小锥孔的特点是孔小而长,用通用内孔车刀几乎不能加工(受孔径限制,刀具刚性明显不足),只能用样板刀具加工。样板刀具如图1所示,刀具呈薄片形、双刃口,两前面在切削过程中与内锥面形成两容屑腔。这种刀具存在以下问题: 1.由于刀具呈薄片形,刚性不足,加工钢件时易产生振动和折断,只能在较小进给量下使 Small tapered hole is characterized by small and long holes, with a common hole tool almost impossible to process (subject to aperture constraints, significantly less rigid tool), can only be used to model tool processing. Model tool shown in Figure 1, the blade was thin, double-edged mouth, the front two in the cutting process and the inner cone to form a two-volume debris chamber. This tool has the following problems: 1. As the blade was thin, rigid enough steel processing is easy to produce vibration and break, only with a small amount of feed to make