球头铣刀骨铣削力有限元建模与试验验证

Finite Element Modeling and Experimental Verification of Bone Milling Force Using Spherical Milling Cutter

在骨科手术中,铣削力对骨裂纹和加工表面质量影响较大。由于临床球形骨铣刀结构复杂,目前尚无有效的理论模型预测切削力。通过引入三维有限元模型模拟球形铣刀加工骨材料过程,评估不同加工参数下的铣削力值。搭建骨铣削试验平台模拟临床操作中的铣削过程,并利用采集到的加工信号分析铣削力。通过试验结果与仿真结果的对比,验证了有限元仿真模型的合理性。该骨铣削有限元模型能够满足不同加工参数下铣削力预测精度的要求,方便指导医生根据不同要求选择合适的加工参数。

In orthopedic surgery,milling force has a great influence on bone crack and surface quality.Due to the complex structure of the clinical spherical bone milling cutter,there is no effective theoretical model to predict the cutting force.The 3D finite element model is introduced to simulate the process of machining the bone material using the spherical milling cutter,and the milling force under different machining parameters is evaluated.A bone milling experimental platform is built to simulate the milling process in clinical operation and analyze the milling force by using the acquired machining signals.The rationality of the built finite element model is verified by comparing the experimental results with the simulation results.The bone milling finite element model can meet the requirements of milling force prediction accuracy under different machining parameters,and it is convenient for guiding doctors to select appropriate processing parameters according to different requirements.