复杂曲面毛坯荒加工算法的研究与实现  

Research and Implementation of a Roughcast with Free Form Surfaces Hogging Algorithm

作　　者：王卫军[1] 沈兵[1] 王小椿[1] 

机构地区：[1]西安交通大学机械工程学院,西安710049

出　　处：《西安交通大学学报》2003年第11期1159-1162,共4页Journal of Xi'an Jiaotong University

摘　　要：提出了一种新的毛坯荒加工算法,解决了在粗加工时大型复杂曲面毛坯变形严重、余量分布不均匀等问题.此算法根据测量的离散数据点进行自由曲面造型,通过曲面求交获得荒加工区域,剔除原有无用的走刀路径,并据此排列出优化的刀位轨迹.在算法中,将复杂的空间曲面求交问题简化为较为简单的代数曲面等高线求解问题,并采用四边形替代包容"荒岛"的最小凸包,不仅简化了刀具的轨迹排列,而且其计算结果也表明了此算法的简洁、高效.Aimed at two shortages during rough working procedures - cast blanks with large-scale free form surfaces are distorted significantly and cutting stocks are distributed very dispersely, a new hogging algorithm is proposed. The algorithm is composed of three primary phases, i.e., the reconstruction of the free form surface with discrete points based on a special Hermite's interpolation; the definition of the hogging areas by means of the curved surface intersection and tool path arrangements. The result indicates that the algorithm is greatly effective to reduce the invalid tool paths so that the working performance can be improved remarkably.

关 键 词：自由曲面 荒加工 走刀路径 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]