关键词: 压缩Voxel模型, 五坐标数控加工仿真, 刀具空间扫描体, 虚拟数控加工

Abstract: This paper describes a new five axes NC simulation method based on compressed voxel model. The swept volume of the cutter and the workpiece in the five axes NC simulation are depicted by the compressed voxel model, which utilizing the Dexel model in three directions to represent a voxel model. This algorithm can greatly save the storage and simplify the Boolean operations. We discuss the visualization of the compressed voxel model and propose an optimal surface extraction method based on the Marching Cubes algorithm. This paper describes also a new method for the swept volume modeling of a cutter tool. First, the swept surface models of the sphere, cylinder, torus, taper and drum are calculated and divided into compressed voxel model by the Ray Casting method separately; Finally, the Boolean operations are used to model the swept volume of the cylinder cutter, ball-end cutter, fillet-end cutter, taper cutter and drum cutter. This method was applied in Five axes NC simulation system base on the compressed voxel model, which has gained excellent effect. The disadvantages of current five axes NC simulation method and commercial software systems are overcome. The method is the key technology for the virtual numerical control machining.

Key words: Compressed voxel model, Five axes NC simulation, Swept volume of cutter, virtual numerical control machining