五轴加工刀具路径生成的有效加工域规划方法

为复杂曲面五轴数控加工的刀具路径优化生成问题提出一种新的有效加工域规划方法。在对工件被加工表面和刀具的几何特征进行分析的基础上，得到在加工件表面上各处的最优可加工域宽度和刀具切削方向。通过采用离散采样和插值计算生成优化的有效加工域集，得到最优化的初始刀具路径；同时建立一种迭代搜索算法，用于解决最优加工域的选择规划问题。采用此算法生成优化的后续刀具路径，使得有效加工域最终完全覆盖整个被加工表面。给出的示例显示相对于传统的五轴加工刀具路径生成算法，有效加工域规划方法可以减少刀具路径的总长度和加工时间，得到更为优化的刀具路径和更好的工件表面质量，因此有效加工域规划方法可以被用于五轴数控加工实践以降低加工成本和提高产品质量。

EFFECTIVE MACHINING REGION PLANNING METHOD OF TOOL PATH GENERATION FOR FIVE-AXIS NC MACHINING

A new effective machining region planning method is represented for optimal tool path generation in five-axis sculp-tured surface machining.Based on the analysis of work-piece surface geometrical feature and the cutter shape,the developed method determines the optimal effective machining region width and the optimal cutting direction in special position of the part surface.By interpolating the adjacent sampling effective machining regions,the optimal initial tool path is generated based on the optimal machining region set,and an itera-tive-searching algorithm is constructed in this proceeding to resolve the machining region select-planning problem.Follow-ing tool paths are generated from the initial tool path until the whole part surface was covered with effective machining re-gions.Compute implementation and illustrative example con-firm that the method reduces the total tool paths length and the machining time,generates better tool paths and finish of work-piece surface comparing with other conventional tool path generation methods.Thus,the effective machining region plan-ning method can improve the quality of products and reduce the cost of five-axis machining.