深孔钻削中的大量问题都是因钻杆刚度不足而引起的。钻杆挠度太大,必然导致扭振,从而降低了稳定性,造成强烈的弯曲振动。这些都将影响钻削的质量。而且往往不可能用中心架支撑钻杆,即使可能,使用上也颇感麻烦。假如使钻杆的悬伸长度随着钻削深度的增加而变 Deep hole drilling in a large number of problems are due to lack of rigidity caused by the drill pipe. Drill pipe deflection is too large, will inevitably lead to torsional vibration, thereby reducing the stability, resulting in strong bending vibration. These will affect the quality of drilling. And often impossible to use the center frame to support the drill pipe, even if possible, is also quite troublesome to use. If the drill pipe overhang length with the drilling depth increases