基于压缩量偏差约束的整体叶盘砂布轮数控抛光路径规划

数控抛光是实现整体叶盘叶片表面光整加工自动化、高效化的关键技术，而抛光路径规划对表面质量有着显著的影响。在抛光曲面时，砂布轮沿接触曲线上的径向压缩量偏差导致材料去除量一致性较差。针对该问题，提出一种基于压缩量偏差约束的路径规划方法。通过对砂布轮受曲面挤压变形几何分析，建立了自由曲面抛光接触线上砂布轮压缩变形量分布模型。在给定刀触点处，以接触曲线上最大压缩量偏差最小化为评价指标构建了刀轴矢量优化模型，并利用改进的粒子群优化（PSO）算法进行求解。基于最优刀轴矢量，完成自由曲面上等参数相邻刀触轨迹曲线的计算。最后，通过数据对比和试验，验证了所提方法的正确性和有效性。结果表明，抛光区域的轮廓度、粗糙度均得到明显的改善。

A polishing path planning method for blisk with abrasive cloth wheel based on compression deviation constraint

CNC polishing is the key technology to realize the automation and high efficiency of the surface finishing of the blisk. And the polishing path planning has a significant influence on the surface quality. When polishing the free-form surface, the deviation of radial compression quantity along the contact curve of abrasive cloth wheel leads to poor consistency of material removal quantity. Based on the geometric analysis of the extrusion deformation of the abrasive cloth wheel, a compression deformation distribution model along the contact curve on the free-form surface was established. The optimization model of tool orientation at one cutter location was established, and the improved Partical Swarm Optimization (PSO) was used to solve the problem. The objective function of optimization was evaluated by minimizing the maximum compression deviation along the contact curve. Then the curves of adjacent cutter contact trajectories are calculated. Finally, the correctness and the effectiveness of the proposed method were verified by experiments. The results show that the contour and roughness of the polished area are improved significantly.