In order to solve the difficulties from the drilling of deep hole, this paper introduces the drilling technique for deep hole by supersonic circumferential vibration.
针对深孔加工难度大的特点，采用超声圆周振动加工技术，在普通车床上附加一套振动装置。
The article presents the application of technique datum hole in designing special clamps for drilling diagonal bore and finishing inclined plane, and raises calculation analysis.
论述加工斜面、斜孔零件时工艺基准孔在夹具设计时的应用，并提出了计算分析。
Field applications show that this technique can effectively prevent coal beds sloughing and decrease hole problems and drilling accidents.
现场应用表明，该技术能有效地防止煤层坍塌，减少井下复杂情况及事故。
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