斜孔钻削中钻头折断的判据实验研究

Experiment Research of the Drill Fracture Criterion in Inclined Hole Drilling

斜孔钻削大量存在于现代制造业中,由于其出钻的特殊加工状态,钻模等辅助方法无法使用。钻头在相当长的时间内处于断续切削状态。轴向力和扭矩均以冲击力出现,极易导致钻头的折断。钻头折断时,轴向力和扭矩均发生了徒增。扭矩的剧烈变化,是折断的主要因素。这为进一步控制和预防钻头折断提供了实验依据。

There are many inclined holes in modem manufacturing industry. Due to the special machining state of drilling out, the drilling jigs and other auxiliary methods can not be used. There is intermittent cutting for a long time during drilling out, and the axial force and torque are also impact force, which cause the drill to break easily. The results of the experiments showed that the axial force and torque were also increased, especially the later, which is the principal factor of the drill fracture. So it is the experimental foundation for further to control and protect the dill to break.