定制髋关节假体数字化设计与制造技术研究

Digital design and manufacturing technology of customized hip prosthesis

针对人体的髋关节具有个性化特征以及传统假体与股骨匹配后力传递不稳定等问题,对人体髋关节假体数字化设计、有限元力传递分析、基于机器人磨削的数字化加工进行了研究,提出了在设计、仿真和加工过程中将髋关节假体模型统一的方法,实现了定制式假体数字化设计、有限元力传递的分析和机器人磨削加工的一体化,初步建立了髋关节假体的数字化设计与制造、产品生命周期的服务模型,为数字化设计与制造技术在髋关节假体等骨科植入物中的应用建立了基础。实验结果表明:采用机器人数字化磨削加工定制式假体,保持机器人软件空间与实际工作空间一致,可以有效提高假体的制造精度,实现假体与股骨髓腔的最优匹配。

Aiming at the personal design of human hip joint and the stable force transmission after the matching of traditional prosthesis and femur, digital design of the human hip prosthesis , finite element analysis of force transfer and digital processing based on robot grinding were studied. The method of unifying hip prosthesis model in the process of design, simulation and processing was proposed to realize the integration of digital design of customized prosthesis, finite element analysis of force transfer and robotic grinding processing and both digital design and manufacture of hip prosthesis and service model of product life cycle were preliminary established to provide the basis for the applications of digital design and manufacturing technology in orthopaedic Implants, such as hip prosthesis. The results show that customized prosthesis produced by robotic digital grinding could effectively improve the manufacturing precision and achieve the optimal matching of prosthesis and femoral medullary cavity by keeping the robot software space consistent with the actual working space.