摘要
提出了一种在五轴激光切割中激光头与工件干涉检查并对激光头姿态进行修正的方法。采用STL模型对激光头进行模型化,并将其分为凸型和凹型两种类型;利用工件STL模型的离散点与激光头各三角面片法向量位置关系找出干涉区域;给出了通过旋转激光头来消除干涉并利用一系列切平面切割激光头来计算临界旋转角的方法;采用VC++和OpenGL完成了算法的系统实现。算法应用实例表明,该方法能够很好地检查出激光头和工件的干涉区域,并能够修正激光头的姿态以避免干涉,整个检查与修正过程稳定可靠。
Methods for interference detection between laser head and part,and correction of laser head posture were proposed. The stero lithography （STL） model of laser heads was built and divided into two types of concave and convex. The interference areas were found out by using the ubiety of the disperse points on STL model and normal vector of triangles that are composed of laser head model. A method to avoid the interference by rotating the laser head and to calculate critical rotating angle by using a series of cutting planes cutting the laser head model was presented. The algorithms were implemented by using VC＋＋ and OpenGL. The case studies show that the method can primely detect the interference areas of laser head and part,and correct the posture of laser head so as to avoid the interference. The whole process of detection and correction are stable and reliable.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第12期3313-3317,共5页
Chinese Journal of Lasers
关键词
激光技术
激光切割
STL模型
干涉
修正
laser technique
laser cutting
STL model
interference
correction
