基于混合八叉树模型的电火花数控加工仿真研究

首先将混合式八叉树数据结构引入电火花数控加工的几何仿真算法，接着提出了一种实用的电极损耗补偿算法，同时在加工仿真中考虑了放电间隙；然后叙述了从零件实体的CSG模型或B－Rep模型转换为相应的混合式八叉树数据结构的过程，并在这一混合式八叉树模型的基础之上完成了仿真过程，最后通过一个零件加工几何仿真实例验证了所提出的算法的可行性和有效性。

Geometry simulation of EDM-NC machining based on blending octree model

The data structure of blending octree model is introduced into geometry simulation algorithm of EDM-NC machining in this paper firstly, and the useful algorithm to compensate the electrode spoilage is put forward. At the same time, the discharge gap is taken into account in the machining simulation process. Then the method used in converting CSG model or B-rep model of part to corresponded blending octree data structure is described, and by means of blending octree model the geometry simulation process is implemented. Finally, the feasibility and validity of this algorithm proposed in this paper is validated through geometry simulation of machining one part.