Research on Profile Geometric Feature Parameters Extraction of Complicated Thin-walled Ring Parts with Irregular Section

Introduction: The metallic W-ring is a typically complicated thin-walled ring part with irregular section, due to its multi-pass forming, closed ring structure, complex cross-sectional profile and small size, it is difficult to design CAD model of each forming pass in short cycle and low cost. The inverse modeling solution based on point cloud slicing is an effective way to reconstruct the ring parts. However, the lack of feature representation usually results in inaccurate and inconsistent topological CAD model. Consequently, it is difficult to represent the original design intention and to modify the final model parameters in an effective way [4]. On the other hand, the parametric representation of intermediate part geometric features is also the basis for the automatic process planning knowledge base.