一种五轴工具磨床通用后置求解方法

摘要

For the problems in five-axis tool grinder post processing caused by non-unification of the grinding wheel initial axis direction and the workpiece coordinate system direction relative to the machine coordinate system, a method based on grinder type transformation is presented by studying the relationship between the tool initial axis direction and machine topologies.In this method, other types of grinding machine is transformed to 6 kinds of grinding machine with grinding wheel initial axis of Z for solving in the way of coordinate system rotation, so that the post processing solution type is reduced.By defining the workpiece coordinate system direction angle, the method of cutter location data preprocessing is presented.And it realizes the unified solution of the machine tool motion quantity in the case of different workpiece coordinate system, so that the portability of NC program is improved.Based on the algorithm, a general postprocessor for five axis grinder is developed with C#, and through the simulation experiment, the feasibility and high efficiency of the algorithm were demonstrated.%针对五轴数控工具磨床砂轮初始轴向、工件坐标系方向相对于机床坐标系不统一导致的后置求解问题,通过研究砂轮初始轴向与磨床拓扑结构之间的关系,提出一种基于磨床类型变换的求解方法.该方法将其他类型磨床的后置求解以坐标系旋转的方式变换到6种砂轮初始轴向为Z轴的磨床上进行,从而减少了求解类型.通过定义工件坐标系方向角,提出一种刀位数据预处理的求解方法,实现工件坐标系不同的情况下机床运动量的统一求解,提高了数控程序在不同磨床上的可移植性.基于该算法,以C#为工具开发了一套五轴磨床通用后置处理软件,并进行了仿真试验,验证了算法的可行性和高效性.