基于平面扫描的五轴数控加工全局干涉检测算法研究

Research on Global Collision Detection for Five-axis NC Machining Based on Sweep Plane Algorithm

提出了一种新的五轴数控加工全局干涉检测算法,这种算法能将每次加工后的工件毛坯形状的改变考虑进去。它分为两个阶段来进行干涉检测,首先用分层包围球法找出发生干涉的最小级的包围球,然后利用平面扫描算法对这些包围球的分层面进行干涉检测以确定这些部位是否真的发生干涉。该算法可以应用于各种类型的五轴数控机床。

This paper presents a new algorithm based on the sweep plane approach for global collision detection for five-axis NC machining. The change of the workpiece geometry due to material removal is taken into account. The algorithm is divided into two phases. Collision detection is firstly conducted by bounding volume algorithm. The interference between the least level bounding spheres is detected,then the slices within these colliding spheres are checked by using the sweep plane algorithm to verify whether the collisions between the objects really occur. The algorithm can be applied to any five-axis CNC machines.