超声振动钻削皮质骨切削区温度的研究

为了直观明了地分析骨钻削过程中切削区的温度,把三维钻削问题转化为二维切削问题,建立了二维正交切削模型;分析骨钻削过程中第三变形区温度的变化,并利用ABAQUS软件建立超声振动正交切削有限元仿真模型,通过试验验证了仿真模型的正确性;然后通过仿真模型,对比分析普通钻削与超声振动钻削的第三变形区温度变化,并进一步分析了超声振动条件下,转速对皮质骨第三变形区温度的影响。结果表明:相比于普通钻削,超声振动钻削能显著降低第三变形区的温度;随着转速的增加,第三变形区温度增加。

Study on Temperature of Cortical Bone Cutting Zone by Ultrasonic Vibration Drilling

In order to understand the temperature of the cutting zone in the process of bone drilling,the 3D drilling problem was transformed into two dimensional cutting problem.A two dimensional orthogonal cutting model was established.The temperature change of the third deformation zone during bone drilling was analyzed.The simulation model of ultrasonic vibration orthogonal cutting was established by ABAQUS software.The correctness of the simulation model was verified by experiment.Through the simulation model,the temperature changes of the third deformation zone by ordinary drilling and ultrasonic vibration drilling were compared and analyzed.The effect of rotational speed on the temperature of the third deformation zone of cortical bone under ultrasonic vibration condition was further analyzed.The results show that the ultrasonic vibration drilling can significantly reduce the temperature of the third deformation zone compared with the ordinary drilling,and the temperature of the third deformation zone increases with the increase of the rotational speed.