基于可重构模具的医用矫形器数字化制造关键技术研究

发布时间：2018-03-11 16:31

本文选题：矫形器　切入点：可重构模具　出处：《宁波大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着数字化制造技术的发展，在上世纪八十年代，计算机辅助设计和计算机辅助制造（CAD/CAM）及逆向工程技术（RE）开始用于矫形器制造领域，为矫形器的制造带来了重大变革。数字化制造技术是当代最受重视、最具有吸引力的制造技术之一，基于可重构模具的方法来研究人体矫形器的制造开拓了数字化制造的新领域。本文以人体腿部矫形器为例，对人体腿部数据采集、腿部矫形器的可重构模具设计、可重构模具调形及后处理等关键技术进行了研究，具体内容如下：对国内外矫形器数字化制造的主要方法做了分析和总结，着重对矫形器数字化制造相关的专利和文献做了介绍。在人体腿部数据采集与处理方面，选用激光三角形法进行数据采集，先高斯滤波然后注册合并数据的处理方法得到腿部数据STL文件，最后介绍了STL文件的读取流程。为了满足人体腿部的基本尺寸和医疗器械对成形曲面表面的要求，设计开发了一款可重构模具。在消除可重构单元体孔隙方法，采用了上部为方形的螺帽的设计方案；在选择可重构单元体驱动方式方面，采用了下部为螺杆的设计方案。对针对矫形器制造的可重构模具成形面的造型原理进行了研究，提出了基于三维扫描技术的曲面造型方法，建立了可重构模具数字化模型，，详细阐述了可重构单元体高度计算的原理。对利用数控机床进行调形的原理、调形方法进行了研究，并开发了具有独立自主知识产权的调形软件。调形软件集数据输入输出、可重构高度计算、虚拟现实、G代码自动生成功能与一体，使可重构模具可在数控机床驱动下自动完成调形任务。为了消除可重构台阶效应的影响，提出了利用数控机床对调形后的可重构模具进行后续加工的方法。通过对调形后的可重构模具进行铣削加工，大大消除了台阶效应的影响，提高了可重构模具表面质量。通过以上的研究，解决了矫形器制造过程中的数据采集及处理、可重构模具设计、调形及显示、台阶效应消除等关键问题，对矫形器的数字化制造做了有益的探索。
[Abstract]:With the development of digital manufacturing technology, in -20s, CAD / CAM and reverse engineering technology began to be used in the field of orthosis manufacturing. Digital manufacturing technology is one of the most important and attractive manufacturing technologies in modern times. Based on the method of reconfigurable mould, the research on the manufacture of human orthosis has opened up a new field of digital manufacturing. In this paper, taking the human leg orthosis as an example, the data collection of human leg and the design of reconfigurable mould for leg orthosis are discussed. The key technologies such as reconfigurable die profile adjustment and post-processing are studied. The specific contents are as follows:. The main methods of digital orthosis manufacturing at home and abroad are analyzed and summarized, and the patents and literatures related to digital orthosis manufacturing are introduced. In the aspect of human leg data acquisition and processing, the laser triangle method is used to collect the data. Gao Si filter and then register the data processing method to get leg data STL file. Finally, the reading flow of STL file is introduced. In order to satisfy the basic size of human legs and the requirements of medical instruments for forming curved surface, a reconfigurable die was designed and developed. In the method of eliminating the pore of reconfigurable unit, the design scheme of nut with square upper part was adopted. In the selection of reconfigurable unit drive mode, the lower part of the screw is adopted. The modeling principle of reconfigurable die surface for orthosis manufacturing is studied. A surface modeling method based on 3D scanning technology is proposed, and a digital model of reconfigurable die is established. The principle of height calculation of reconfigurable unit is described in detail. In this paper, the principle and method of profile adjustment using NC machine tools are studied, and the modulation software with independent intellectual property is developed. The software sets data input and output, and reconfigurable height calculation. The function of automatic generation of G code in virtual reality can make the reconfigurable mould realize the task of adjusting shape automatically under the drive of NC machine tool. In order to eliminate the influence of the reconfigurable step effect, a method of machining the reconfigurable mould with NC machine tool is put forward. The influence of the step effect is greatly eliminated by milling the reconfigurable mould after adjusting the shape. The surface quality of reconfigurable die is improved. Through the above research, the key problems in the process of orthosis manufacturing, such as data acquisition and processing, reconfigurable die design, shape adjustment and display, step effect elimination, etc., have been solved, and useful exploration has been made for the digital manufacture of orthosis.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH789

【共引文献】