基于渐进成形技术的颅骨修复体数字化设计与成形研究  

Research on digital design and forming of skull prosthesis based on incremental sheet forming

作　　者：郑硕 查光成[1,2] 蒋哲东 冯星宇 严阿鑫[1] 查一凡 ZHENG Shuo;ZHA Guang-cheng;JIANG Zhe-dong;FENG Xing-yu;YAN A-xin;ZHA Yi-fan(School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,China;Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology,Nanjing 211167,China)

机构地区：[1]南京工程学院材料工程学院,江苏南京211167 [2]江苏省先进结构材料与应用技术重点实验室,江苏南京211167

出　　处：《塑性工程学报》2020年第3期34-42,共9页Journal of Plasticity Engineering

基　　金：江苏省研究生实践创新计划项目(201911276037Y);南京工程学院“挑战杯”支撑项目(TZ20190034)。

摘　　要：基于患者原始CT数据,采用渐进成形技术设计了一套完整的修复体数字化设计与成形方案。首先从患者头部CT数据中提取出缺损的颅骨数据并进行三维重构。再从颅骨点云数据中提取出兴趣区域,使用参数化NURBS曲面对缺损区域进行三维反求。根据反求出的曲面模型,利用正向建模软件进行辅助加工面的设计,并生成NC加工代码。最后,采用渐进成形技术进行数字化无模制造,并使用线切割机床精确切除辅助加工面,得到最终的颅骨修复体。该技术解决了传统颅骨修复体设计与制造过程中存在的周期长、成本高且加工精度低等问题,实现了颅骨修复体的数字化设计与无模柔性制造。Based on the original CT data of patients,a complete digital design and forming scheme of prosthesis was designed by incremental sheet forming(ISF).Firstly,the defective skull data were extracted from the head CT data of patients and reconstructed in three dimensions.Then,the region of interest was extracted from the skull point cloud data,and the defect area was three-dimensional inversed by parametric NURBS surface.Based on the inversely obtained surface model,the forward modeling software was used to design the auxiliary machining surface and generate the NC machining code.Finally,ISF was used for digital moldless manufacturing,and the auxiliary machining surface was precisely cut by the wire cutting machine to obtain the final skull prosthesis.The technique solves the problems of long cycle,high cost and low processing precision in the traditional design and manufacture of skull prosthesis,and realizes the digital design and moldless flexible manufacturing of skull prosthesis.

关 键 词：三维重构 渐进成形 颅骨修复 线切割 

分 类 号：TG386[金属学及工艺—金属压力加工]