The effect of the detuning of the stiffness of drillingspindle on the frequency of double spindledrilling machine is discussed by using Perturbation theory of nearly equal frequencies.
运用近频摄动理论分析了双轴钻床钻轴刚度失谐后对钻轴系统固有振动频率的影响。
2
The drilling machines may be classified into three general type:Vertical spindle, Multiple Spindle, and Radial Spindle machines.