孔加工在零件加工中占有很重要的比重,孔加工质量的好坏往往影响着零件的使用性能,所以在生产中要铁别留意影响加工质量的因素,并通过理论与实践结合的办法解决孔精度超差问题。文章介绍了数控加工孔的加工方法及其选择,钻孔,铰孔工艺的特点与加工要点,铣孔工艺,供相关人员参考。 Hole machining occupies a very important part in the processing of parts, the quality of the hole processing often affect the performance of the parts, so do not pay attention to the iron in the production of the factors that affect the processing quality, and through the combination of theory and practice to solve the hole Out of tolerance problems. This paper introduces the machining method of NC machining hole and its selection, the characteristics and processing points of drilling and reaming, the milling technology and reference for related personnel.