In the deep-hole boring process on pure niobium tube, there exist some problems including serious tool wear, tough chips, and poor surface quality. In order to bore high-quality deep holes on rolled niobium tube, the cutting tool structure and boring process parameters suitable for machining rolled niobium tube were designed and two experimental schemes were proposed. The results showed that the geometric parameters of the cutting tool and process parameters have important influences on the tool wear, chip morphologies, hole-axis deflection, and hole surface roughness. By adjusting the geometric parameters of the cutting tool and boring process parameters, reasonable geometric parameters of the cutting tool and boring process parameters were obtained.

中文翻译：

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纯铌管深孔镗削试验研究

在纯铌管深孔镗削加工中，存在刀具磨损严重、切屑坚韧、表面质量差等问题。为了在轧制铌管上加工出高质量的深孔，设计了适合于轧制铌管加工的刀具结构和镗削工艺参数，并提出了两种试验方案。结果表明，刀具的几何参数和工艺参数对刀具磨损、切屑形态、孔轴偏转和孔表面粗糙度有重要影响。通过调整刀具几何参数和镗孔工艺参数，得到合理的刀具几何参数和镗孔工艺参数。