三角网格模型偏置边界顶点的法矢方向分析  

Analysis on the Vector of Boundary Vertices for Triangle Mesh Models

作　　者：文豪[1] 高健[1] 钟国宇[1] 

机构地区：[1]广东工业大学机电工程学院,广东广州510006

出　　处：《机械设计与制造》2014年第1期29-32,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51175093);广东省重大科技项目(2010A080401003)

摘　　要：随着计算机技术及数字化制造技术的发展,越来越多的实物零件通过扫描的三角网格模型直接实现数控编程和加工,从而加速产品开发过程,提高生产效率并降低成本。为提高基于三角网格模型的数控加工精度,重点分析三角网格模型边界顶点法矢计算中存在的问题,描述现有法矢计算方法可能导致的加工过切现象,提出边界顶点法矢的修正计算方法。通过更为准确有效的边界顶点法矢,改进CL路径截面法,从而避免三角网格模型进行边界加工时易于产生的过切现象。With the rapid development of computer technology and digital manufacturing, more and more real parts through the triangular mesh model scanning are used to NC programming and machining directly. In this way, it can accelerate the product development process, improve production efficiency and reduce the cost. In order to improve the machining precision of the triangle mesh,it focuses on the analysis of the problem of triangle mesh vertices normal vector calculation, and finds possible overcutting phenomenor. Then, it puts forward to a new correct method. By calculating the boundary vertex normal vector effectively and improving the CL path section method, it can avoid the boundary mesh undercutting phenomenon.

关 键 词：三角网格模型 边界顶点 法矢计算 过切现象 

分 类 号：TH16[机械工程—机械制造及自动化] TN915.09[电子电信—通信与信息系统]