华中科技大学学报（自然科学版）2024，Vol.52Issue(6)：48-55,8.DOI:10.13245/j.hust.240592
基于十字网格拓扑结构的球头刀具切削轨迹仿真算法研究
Research on ball-end mill cutting trajectory simulation algorithm based on cross mesh topology structure
摘要
Abstract
As the existing solid construction model is complex in calculation,and cannot meet the high real-time requirements of the simulation task,a two-dimensional mapping algorithm of cross mesh topology was proposed to improve the efficiency of Boolean difference calculation.A cross mesh topology was proposed for the bottom topology of the simulation model,and node elements were stored in the dynamic adjacency table as cross mesh data objects to save memory.In addition,the cross mesh data of complex surfaces was constructed based on non-uniform rational B-splines(NURBS)surface subdivision,which expanded the practicability of the method.Numerical control(NC)interpolation instructions were used to simplify the trajectory of the ball-end tool,and a tracing contour method was proposed to construct the intersecting contour of the workpiece and the tool,and speed up the intersecting point search process.Mesh parameterization was introduced to map the three-dimensional data of intersecting contour lines to a two-dimensional array to quickly generate the intersecting surfaces of workpiece and tool.Experimental results show that the efficiency of the proposed method is more than 10 times higher than that of the mainstream method,and the average memory usage is reduced by 46%,which indicates that the tracing contour and two-dimensional mapping can effectively accelerate the calculation,and the cross mesh topology can significantly improve the memory utilization.The proposed algorithm can obviously improve the computational efficiency of boundary representation and is helpful to the real-time application of computer aided systems.关键词
边界表示法/球头刀具/布尔求差/十字网格拓扑结构/计算机辅助制造Key words
boundary representation/ball-end tool/Boolean difference/cross mesh topology/computer aided manufacturing分类
信息技术与安全科学引用本文复制引用
谈玲,陈鹏,夏景明,林疆..基于十字网格拓扑结构的球头刀具切削轨迹仿真算法研究[J].华中科技大学学报（自然科学版）,2024,52(6):48-55,8.基金项目
国家自然科学基金资助项目(62271264) （62271264）
科技部科技创新2030——新一代人工智能重大科技项目(2021ZD0102100) （2021ZD0102100）
江苏省产学研基金资助项目(BY2022459). （BY2022459）
