整体叶轮五轴粗加工多级刀位规划的计算方法

Several-Stage Tool-Path Scheduling in 5-Axis Roughing of Impeller

针对整体叶轮五轴粗加工刀位轨迹自动生成的问题 ,提出了一种刀位规划的方案 .通过对叶轮通道的几何分析 ,采用多级荒加工方法对加工余量较大的区域进行局部加工 ,完成了对叶轮扩槽加工的预处理后 ,再采用小尺寸刀具对叶轮进行粗加工 .由于各级荒加工刀具尺寸的不确定性 ,因此以总加工时间最小为目标函数对刀具尺寸进行优化组合 ,分别给出了各级刀位轨迹的规划算法 ,并已在自行开发的整体叶轮计算机辅助制造 (CAM )软件中得到了成功的应用 .

A tool path scheduling methodology for 5 axis roughing of impellers is presented. Hogging method is a pre processing for impleller′s slot enlarging machining and is used in local area where thick stack needs to be removed. The smaller cutter is then utilized for the impeller roughing. Since there exists an uncertainty of tool size in each hogging stage, the tool size combination is determined according to the minimum of total machining time. This algorithm has been successfully used in home developed Impeller CAM software.