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为了解决五轴数控加工中两个旋转轴带来的易碰撞性,提出五轴加工复杂曲面的函数碰撞检测方法.在五轴加工仿真应用中,针对复杂曲面选取工件体素,通过隐函数方程构建刀具曲面,再进行逆运动映射,运用包围盒检测快速排除规则实体,如有包围盒重叠,则进一步检测,可剔除无关点,缩小检测范围,减少检测时间,最后运用隐函数方程求解根之间的关系判断是否发生碰撞.试验以球头铣刀为例,试验结果验证此方法能准确的实现碰撞检测,提高五轴加工中复杂曲面的碰撞检测时间性能,该算法可以应用于任何五轴数控机床.
In order to solve the easy collisions caused by two rotating axes in five-axis NC machining, a method of function collision detection based on five-axis machining complex surface is proposed.In the five-axis machining simulation application, the workpiece voxel is selected according to complex surface, Build tool surface, and then reverse motion mapping, the use of bounding box detection rules to quickly rule out the rule, if the bounding box overlap, then further testing, excluding unrelated points, reduce the detection range, reduce the detection time, and finally the use of implicit function equations to solve the root The relationship between the judge to determine whether the collision.Experimental ball-end milling cutter as an example, the test results verify that this method can accurately achieve collision detection, improve the complex surface of five-axis machining collision detection time performance, the algorithm can be applied to any five-axis CNC machine tools.