摘要
阐述了一种基于STL文件进行自适应切片的有效方法 ,以减少台阶效应对成形零件各种性能的影响。利用零件STL文件中小三角片法向量 ,计算出各小单元层侧表面最大法向量 ,适应性地计算出在分层方向上每层切片的厚度 ,确保层与层之间的台阶效应在允许值范围内。利用STL小三角片数据反向求出其切片方向对应小单元层的法向量 ,提高了计算速度。对该方法在直接切片时的不足进行了分析 。
An effective method based on STL files for adaptive slicing is proposed in this paper so as to reduce the influence of step effect towards the various characteristics of prototyping parts. By utilizing the normal vector of small triangles in the STL files, the maximum of normal vector of the flank surface among the unit levels is calculated. And the thickness of each level along the dividing direction is also calculated adaptively. In this way, the step effect is guaranteed to fluctuate in the permitted range. Compared with other methods, the method for adaptive slicing can backward obtain the normal vector of many small units that correspond to the dividing directions according to the small triangle data and improve the speed of computation. In addition,the disadvantages of this method in the process of direct slicing are analyzed and a precise revision scheme is put forward.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2003年第9期750-752,共3页
China Mechanical Engineering
基金
国家 8 63高技术研究发展计划资助项目( 2 0 0 1AA42 1160 )
