并联机床中工件安装位置决定系统的开发

并联机床由于结构和工作空间极其复杂,在加工工件时经常出现各种干涉.以日本丰田工机公司的HexaM并联机床为模型,讨论了并联机床的自己干涉、机床与工件的干涉、机床与周边器械的干涉的检查方法和回避方法.提出了在不修改刀具轨迹的情况下,通过调整工件的安装位置来回避以上干涉的计算方法.最后通过实验,证明了算法对于在实际加工前检查可能出现的干涉,以及确定出无干涉的工件安装位置是非常有用的.

Development of a Workpiece Location Determination System in Parallel Mechanism Type Machine Tools

This paper uses HexaM made by Toyoda Machine Works Co. as an analytical model of parallel mechanism type machine tools. Much collision may be generated for its complicated structure and working space, when a workpiece is machined using this machine. For example, those collisions are generated between the moving components of the parallel mechanism, between the moving components and a workpiece and between the moving components and the tool storage for automatic changing. In this paper, an algorithm for detecting and avoiding those collisions was proposed. The method for avoiding the collisions was conducted by readjusting the location of the workpiece without amending the tool path. It is confirmed through experiment that the proposed algorithm is useful for detecting the collisions and determining location of the workpiece prior to the actual machining.