Digital model reconstruction and geometric error analysis of additive manufacturing blisk enabled by 3D scanner

Abstract

Additive manufacturing has advantages in manufacturing blisk. However, additive manufacturing blisk can deviate in size and shape from their original digital models. In this paper, the shape of a complex shaped blisk manufactured by additive manufacturing is measured by using a 3D scanner, and the geometric errors compared to the digital model are calculated by using a column vector row index-based K-Neighborhood search algorithm. The computed range for geometric errors falls within (0.0075 mm, 6.9177 mm). Approximately 94% of the data points have errors within 3 mm. Larger geometric errors are primarily concentrated at the edges of the blades, aligning with the characteristic features of additive manufacturing processes.