航空叶片打磨余量分析及轨迹生成

Grinding Allowance Analysis and Path Generation of Aero Blade

摘要:

针对航空发动机叶片打磨加工前,叶身余量分布不均且较小的问题,提出一种基于毛坯点云配准的加工余量分析和自适应打磨轨迹生成方法。利用精确扫描测绘技术获取毛坯三维点云,形成了毛坯/零件数模二者点云配准方法；通过基准对齐、点云轮廓包含等条件约束,实现了毛坯三维加工余量分析；在余量分布点云基础上,通过截面获取加工点云轨迹,对轨迹点云进行珠链排序,将轨迹排序点有效化,计算出连续合适的打磨路径,实现自适应余量打磨。最后在Vericut软件中进行了打磨仿真,验证了提出方法的有效性。

Abstract:

In order to solve the problem of uneven distribution of machining allowance before aeroengine blade grinding, a method of machining allowance analysis and adaptive grinding path generation based on blank point cloud registration is proposed. The 3D point cloud of the blank is obtained by using the accurate scanning and mapping technology, forming the point cloud registration method of the blank/part mathematical model; Through the constraints of datum alignment and point cloud contour inclusion, the 3D machining allowance analysis of blank is realized; On the basis of the allowance distribution, the machining point cloud track is obtained through the sec-tion, the bead chain is sequenced for the track point cloud, and the continuous and appropriate grinding path is calculated to achieve adaptive allowance grinding. Finally, the grinding simulation is carried out in Vericut software to verify the effectiveness of the proposed method.