Research And Implementation On Algorithm Of Automatic Inspection Of Blisk Blades

Blisk is widely used in the field of aircraft engine manufacturing and revers e engineering.In both areas,blisk must be efficiently and accurately measured.But because of its complex geometric structure,the measurement of blisk becomes difficult.In this paper,we propose a method to generate the trajectory of blisk directly from the CAD model of blisk with the 3 + 2 axis coordinate measuring instrument.The method consists of three parts.First,the measurement points are planned on the blisk.The triangular mesh vertices are taken as the measurement points after triangulation and the discrete plane Gaussian sphere segmentation method is used for all the measurement points to their Visibility cones.And then according to the visibility cone of each measurement point,using the clustering algorithm to carry out the division of the area on all the points on the blade.In each area,there is a common measurement direction to achieve no collision measurement of all the measurement points.And the measurement points in the region have adjacency relation on the triangular mesh topology.Finally,the measurement order of the measurement points is determined.According to the topological relation of the measurement points in the triangular lattice,the trajectory sequence between the traversal order and the measurement area in the measurement area is planned and the final measurement trajectory is obtained for the specific measurement area.Based on this method,it is possible to reduce the number of transitions of the 3 + 2-axis probe azimuth in the absence of interference to achieve efficient non-collision measurement of blisk.