3D打印外固定支具参数化反求建模方法  

Method of parametric reverse modeling for 3D printed external fixation

作　　者：王坤[1,2] 张振江 赵卫国 WANG Kun;ZHANG Zhen-jiang;ZHAO Wei-guo(School of Mechanical Engineering,Inner Mongolia University of Technology,Hohhot 010051;School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051;School of Aviation,Inner Mongolia University of Technology,Hohhot 010051)

机构地区：[1]内蒙古工业大学机械工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [3]内蒙古工业大学航空学院,内蒙古呼和浩特010051

出　　处：《机械设计》2021年第5期121-126,共6页Journal of Machine Design

基　　金：2020年教育部产学合作协同育人资助项目(202002232006);2018年内蒙古自治区高等学校科学技术研究资助项目(NJZY1-8080);内蒙古自治区人社厅留学人员科技活动资助项目(2017-20)。

摘　　要：基于Grasshopper插件研究3D打印外固定支具的参数化反求建模方法,以实现外固定支具三维模型的快速精准构建,提高定制效率并减小支具偏差,从而促进3D打印外固定支具的快速个性化定制。使用三维扫描仪获取患者手臂骨折部的外轮廓数据,采用Geomagic Studio软件对点云数据进行处理,得到基础数字模型,通过Grasshopper组件连线编写反求设计建模程序,并选取手臂骨折数字模型对建模程序进行建模速度与偏差测试。反求建模程序比传统建模方式耗费时间更少,精度更高,符合个性化定制的要求。使用Grasshopper插件编写算法程序降低了设计人员建立外固定支具三维模型的难度,并简化了设计流程,提高了设计效率,实现了快速三维模型构建和个性化定制。A parametric reverse modeling method for 3 D printed external fixation was researched based on Grasshopper software to achieve rapid and accurate construction of 3 D external fixation models. The efficiency of customization was improved and the brace deviation was reduced. Thus,the rapid personalized customization of 3 D printed external fixation brace was accelerated.A 3 D scanner was used to obtain external contour data of the fracture part of the patient’s arm. Geomagic Studio software was used to process the point cloud data to get basic digital model. The reverse design modeling program was composed with Grasshopper plug-in. The digital model of fractured arm was selected to perform modeling speed and deviation test. Compared with traditional modeling method,the reverse modeling program took shorter time and had higher accuracy. Thus,it could meet the requirements of customization. Grasshopper plug-in programming algorithm reduced the modeling difficulty of 3 D external fixation model. The design process was simplified,and the design efficiency was improved. The rapid 3 D construction and personalized customization of external fixation brace were realized.

关 键 词：3D打印 外固定支具 反求建模 参数化设计 GRASSHOPPER 

分 类 号：TB472[一般工业技术—工业设计]