以6-TPS型并联机床为结构模型,阐述了数控代码生成原理及无干涉刀位文件的生成方法。给出了机床后置处理的公式化描述,建立了后置处理器的系统框架,探讨了后置处理过程中坐标变换和作业空间检验,提出了利用多余自由度优化动平台位姿的策略。研究了通过优化一组刀位文件的综合误差度来确定工件坐标系定位矢量的方法,提出了基于刀轴矢量的Descartes空间插补算法。提出的系统结构及算法已经在多台并联机床开发中得到应用和验证。 Taking the 6-TPS parallel machine tool as the structural model, the principle of NC code generation and the generation method of non-interference cutter location file are expounded. The paper gives the formulaic description of the post-processing of the machine tool, establishes the system framework of the post-processor, discusses the coordinate transformation and work space test in the post-processing, and proposes the strategy of optimizing the pose of the moving platform by using the extra degree of freedom. The method of determining the position vector of the workpiece coordinate system by optimizing the comprehensive error degree of a set of tool position files is proposed. The Descartes space interpolation algorithm based on the tool axis vector is proposed. The proposed system structure and algorithm have been applied and verified in the development of multiple parallel machines.