基于多点成形的颅骨钛板假体制造过程研究  

Study on the manufacturing process of titanium prosthesis for cranioplasty based on MPF

作　　者：刘伟[1] 张传敏[2,3] 李明哲[3] 

机构地区：[1]河南工业大学机电工程学院,郑州450007 [2]吉林大学珠海学院机电工程系,珠海519041 [3]吉林大学辊锻工艺研究所,长春130025

出　　处：《机械设计与制造》2008年第11期142-144,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金项目资助(50275063)

摘　　要：采用多点成形技术,并结合计算机辅助设计技术研究了颅骨钛板假体的制造过程。首先,从病人患处的CT数据集中重构颅骨三角网格模型。然后,采样该三角网格模型获得代表性散乱点集,使用薄板样条插值技术重建得到钛板假体表面形状模型。最后,采用夹持压制工艺在多点压力机上最终成形出所需的钛板假体,利用厚度较大、强度较高的夹持板可以有效防止压痕、皱纹等缺陷的产生。该技术能够显著缩短钛板假体的制造周期,同时大大提高假体与患处的贴合精度。Based on Multi-Point Forming（ MPF ） technology, the manufacturing process of cranial titanium plates for the repair of skull defects was studied by combination with computer aided design. Firstly,a 3d triangular mesh model of the skull is reconstructed from CT data set. Then,the skull polygon model is sampled to obtain representative scattered point set. The thin-plate spline interpolation technology is used to reconstruct it to gain sulface model of titanium prosthesis. Finally,the grip pressed technology is adopted to form the titanium cranioplasty,the grip block with large thickness and high strength con prevent effectively generation of defects such as dimple and wrinkle. The method can remarkably shorten the production cycle of titanium cranioplasty,as well as keeping an improved fitting precision.

关 键 词：多点成形 薄板样条 钛板假体 夹持压制 

分 类 号：TH16[机械工程—机械制造及自动化]