我厂加工 RD_2轴轴孔用的三孔钻床钻模板如图1所示。在使用中发现随着钻孔深度增加铁悄会顺着钻头螺旋槽进入钻头与钻套之间(一般新钻套与钻头配合公差为0.06mm),从而影响钻套的导向功能,易使钻套裂损。在铁屑进入钻套后,严重时会使钻头旋转不起来,并损坏连接钻 I plant processing RD_2 shaft hole with a three-hole drill drilling template shown in Figure 1. In use, it is found that as the drilling depth increases, the iron enters the drill bit and the drill bit along the drill bit helical groove (generally, the tolerance of the new drill bit and the drill bit is 0.06 mm), thereby affecting the guiding function of the drill bit, Set crack damage. After the iron filings enter the drill collar, it can cause the drill bit not to rotate in severe cases and damage the connecting drill