轴向低频振动辅助皮质骨钻削的钻削力和温升

为了研究轴向低频振动钻削方式在皮质骨钻削中对钻削力和温升的影响，基于一种自主研发的低频振动钻削设备，对常规和轴向低频振动辅助皮质骨钻削的钻削力和温升进行了实验，建立了钻削力和产热速率模型。实验结果表明：轴向低频振动钻削方式的进给力和转矩明显减小，温升降低了3~5 ℃；通过统计方法确定主轴转速是影响钻削力和温升的最显著因素，并进行了双目标优化。模型计算结果与实验数据趋势相吻合，可以认为轴向低频振动产生的钻头与骨组织周期性分离运动是钻削力和温升减小的主要原因。

Drilling Forces and Temperature Rises in Axial Low-frequency Vibration-assisted Cortical Bone Drilling

 In order to study the influences of axial LFVAD method on drilling forces and temperature rises in cortical bone drilling processes, experiments of the drilling forces and temperature rises in conventional drilling and axial low-frequency vibration-assisted cortical bone drilling were conducted based on a self-developed LFVAD equipment. Drilling forces and heat generation rate models were presented. Experimental results show that the feed force and torque in axial LFVAD are obviously reduced, and the temperature rises are reduced by 3~5 ℃. It is found that the spindle speed is the most significant influence factor of drilling forces and temperature rises. Double objective optimizations were performed by statistics. Results from the model are consistent with experimental data. It may be regarded that periodic separation of drill bit and bone tissue generated by axial LFVAD is the main reason for the reductions of drilling forces and temperature rises.