文献类型：期刊文献

中文题名：点云曲面等残留高度刀具路径规划

英文题名：Constant scallop-height tool path planning for point cloud surface

作者：吴福忠[1]

机构：[1]绍兴文理学院工学院

年份：2012

卷号：18

期号：5

起止页码：965

中文期刊名：计算机集成制造系统

外文期刊名：Computer Integrated Manufacturing Systems

收录：CSTPCD、、北大核心2011、EI(收录号：20122815240344)、Scopus(收录号：2-s2.0-84863590789)、CSCD2011_2012、北大核心、CSCD

语种：中文

中文关键词：支持向量机;点云曲面;等残留高度;刀具路径

外文关键词：support vector machine;point cloud surface;constant scallop-height;tool path

中文摘要：现有方法在解决满足一定条件的测量点刀具路径直接生成问题时存在若干缺陷,为此提出一种基于最小二乘支持向量机的点云曲面三坐标加工等残留高度刀具路径生成方法。应用最小二乘支持向量机拟合散乱点,完成四边形网格划分,实现散乱点的网格化重建。分别以残留高度和刀具半径为等距距离,对初始网格进行等距计算,得到以网格形式表示的残留曲面和刀具中心曲面。应用曲面等残留高度刀具路径生成几何模型,通过网格曲面与刀具包络面之间的求交计算和逐步递推方法,求出矩形域内点云曲面加工等残留高度刀具路径。应用边界网格识别和测量点高斯映射技术提取边界特征点。通过边界裁剪,求得实际边界域内的刀具路径。通过实例验证了该方法的可行性,并与目前常用的等间距刀具路径生成方法进行比较,结果表明该方法能够合理地解决加工精度和效率间的匹配问题。

外文摘要：The existing method had some defects on solving measuring point’s direct formation of tool path planning which satisfied certain condition.Therefore,a constant scallop-height tool path planning method based on Least Square Support Vector Machine（LS-SVM）for 3-axis machining of point cloud surface was proposed.The measured point fitting was constructed by using LS-SVM,and quadrilateral mesh generation was completed.Thus the gridding of measured point was reconstructed.The scallop surface and tool-center surface were obtained through offsetting the initial mesh with scallop-height and tool radius respectively.According to the geometric model of constant scallop-height tool path generation,the point cloud surface and constant scallop-height tool paths in rectangle domain was acquired by tool envelope surface intersecting with mesh model.The boundary feature points were extracted by method of boundary mesh extraction and Gauss mapping technique,and the tool paths of actual boundary domain were found out by boundary trimming.The effectiveness of proposed method was verified by examples and compared with the presented method of commonly used iso-planar machining.The results indicated that the present method could better solve the match conflict between machining precision and efficiency.