数控加工中复杂轮廓环的等距干涉处理  

Offset of Complex Pocket Profile in Numerical Control Cutting

作　　者：姜晓峰[1] 周来水[1] 周儒荣[1] 

机构地区：[1]南京航空航天大学CAD/CAM工程研究中心

出　　处：《南京航空航天大学学报》1998年第6期628-632,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：复杂轮廓环的等距算法是ＣＡＤ／ＣＡＭ系统中重要的基本算法之一，该算法的完善与否决定着ＣＡＤ／ＣＡＭ系统的基本性能。许多研究人员针对这个问题提出了若干有益的解决方案，但这些算法的结果并不是特别理想。本文针对数控加工中复杂轮廓环的等距问题，提出了一种有效的环原始等距、原始等距后环的自交处理算法。其基本思想是对复杂轮廓环经原始等距和过渡后形成的复杂网状环进行拓扑关系的规整和判断，从而生成正确的等距结果环。在此基础上开发出了平面型腔行切加工模块和复杂多曲面三轴层切法粗加工模块，并通过这两个模块的应用反复验证了该算法的正确性，实践证明该算法可靠、效率高，完全能满足ＣＡＤ／ＣＡＭ系统的需要。The offset algorithm of complex profile loops is one of the important basic algorithms in the CAD/CAM system. The perfect algorithm determines the performance of the CAD/CAM systems. For this reason, many scholars and researchers have presented many helpful schemes, which are still not completely satisfactory. A new algorithm, including the first offset and the self intersection treatment of the profile loops, is investigated for NC milling. Its key idea is to analyze and regulate the topology relationship of the complex net loops generated from the first offset and transition of the complex profile loops, with the result of the correct offset loops. In accordance with the algorithm, a planar zigzag milling module and a 3 axies rough milling module are developed. The validity of this algorithm is repeatedly tested through the applying of these two modules. The algorithm is reliable and efficient, so it can meet the need of the CAD/CAM systems.

关 键 词：CAD CAM 数控切削 自交 轮廓环 等距算法 

分 类 号：TP391.73[自动化与计算机技术—计算机应用技术] TG659[自动化与计算机技术—计算机科学与技术]