双摆头五坐标机床建模中的多解选择控制与算法验证

摘要

The mechanism model of a spindle-rotating machine is proposed in this paper according to the mechanism theory. The movement model is established using coordinate transformation, and the solving of this model is discussed. Based on these and the relationship between the two rotating axis, an efficient algorithm for multi-choice has been presented. A dedicated post-processor was developed by VS2010 language. Two simulation cutting experiments of a hemisphere and a circle frame are conducted in VERI-CUT and then a testing workpiece is machined. All the results show that the algorithm is correct.%针对一种双摆头五坐标数控铣床,从机构学的角度论述了机床的结构模型,以坐标变换的方式建立了机床的运动模型,详细论述了机床的运动模型求解,并对其中的多解选择问题进行了探讨.在此基础上,结合五轴联动加工时,两转动轴存在的关联依赖关系,综合考虑两转动轴的加工信息,给出了一种多解选择算法.在此算法的基础上,基于VS2010平台,开发了该类机床的专用后置处理器,在VERICUT中建立了机床的仿真模型,并通过半球面以及圆框两组仿真切削试验对以上算法进行仿真验证.最后,实际加工了一个测试样件,仿真验证与实际加工的结果均表明所提出的方法正确可行.