RP系统中STL模型的分割与拼接研究

【作者】 纪小刚；

【导师】 侯丽雅； 章维一；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2003， 硕士

【摘要】 快速原型(Rapid Prototyping：RP)系统一般体积过大、投资过高、零件制造成本及系统运行费用昂贵，严重阻碍了该种先进技术及系统的推广与应用。在全面了解市场需求的前提下，开发小体积、低成本的RP系统使其和谐地成为办公设备、甚至走入家庭是本文研究工作的背景。 本文主要研究了STL模型的分割，和STL模型的拼接，扩大了现有RP系统的功能，能够加工大尺寸的零件，或者同时加工多个小零件。 研究了STL模型的分割技术及其必要性，研究了STL模型的纠错及其拓扑。采用切片技术获得了截面轮廓，用Delaunay三角网格划分算法将截面轮廓网格化，用精确定位技术保证了模型粘接的精度；在Delaunay三角网格划分的基础上，实现了快速原型的三角形扫描。 研究了STL模型的拼接技术及其必要性，实现了拼接功能。通过OpenGL的显示和交互功能，实现了对各个模型的动态调整，用方向优化算法提高了模块的精度和易用性。 实验表明，本商用软件扩大了快速原型机的加工范围，提高了加工效率，节省了原材料，降低了加工成本，并充分考虑了商用软件的易用性和智能化，具有良好的实用价值。更多还原

【Abstract】 Most Rapid Prototyping (RP) systems have the following disadvantages: bulky, expensive, and requiring a large cost. So the advanced technology and its system are restricted to be applied. According to market requirements, a new RP system, which is small volume and low price, is developed and pushed into the market, even into office and home. It is the point of this paper.This paper is focused on the study of dividing and combining module based on STL model, which enhances the function of existent RP system and makes it to be able to manufacture big parts or several small parts at one time.Dividing technology based on STL model and its necessity is studied in this paper. Rectification and topology base on STL model is researched, too. The contour information is obtained by using slice technology; the Delaunay triangular meshes are generated by using Delaunay triangulation algorithm and conglutinate precision of divided models is insured by using precise orientation technique. In addition, triangle scan is accomplished based on Delaunay triangulation algorithm.Combining technology based on STL model and its necessity is studied in this paper and the combining function is completed. Every model can be adjusted dynamically by using OpenGL technology. Precision and facileness of this software is unproved by using orientation optimization algorithm.On experiment, machining scale of RP system is extended, manufacturing efficiency is improved and material expenditure is reduced by using this commercial software. The facileness and intellectualization of this software is considered adequately and it is proved to be useful.更多还原