磨牙牙冠的模型重构与CAM工艺

口腔修复体中的磨牙牙冠具有复杂的型面结构,其设计和加工工艺均有其独特性.文中利用逆向重构技术,对磨牙牙冠进行反求测量获得其点云数据,基于点云数据重建零件模型和完成再设计.然后结合理论分析、仿真和实验的方法分析其加工工艺性,选择合理的切削参数以减少加工过程中的刀具及工件变形对工件加工质量的影响,及由于刀具和零件的颤振导致的加工误差.最后针对磨牙牙冠的特点,生成合适的数控刀轨,加工出符合设计要求的实物.该分析方法对同样复杂的零件的加工具有参考价值.

Model Reconstruction and CAM Process of Molar Crown

Take the molar crown which is typically in dental restoration as an example, by using reverse remodeling technique, engineer can measured its complex structure, obtained point-cloud data, and then reconstruction and re-design of the parts based on this point-cloud data. Combine the method of theory analysis, simulation and experiment to analyze the processing technology. Choose reasonable milling parameters to reduce the fabricating error which is caused by deformation of part and cutter in milling. Chatter and cutting force are the reasons for the deformation of part and cutter. In view of the molar crowns' characteristic, a suitable NC tool path been generated, then fabricated it, the result of test shown that consistent with design requirements. This analysis method has a reference value for the machining of parts with complex structure.