Method of Geometric Features Recognition for STEP Files
Peng Zhang, Cong Geng · 2025
Automatic recognition of geometric features formed in design phase is regarded as a primary technical challenge that needs to be addressed in intelligent manufacturing. With the significant increase of the complexity of surface modeling, B-spline curves have been widely used in the design phase, which also add complexity of feature recognition. This paper presents a B-spline curve recognition method that combines curvature decomposition and vector angle decomposition together. By using this method, the geometric characteristics of the curves can be retained while changes in the direction of the curve path can be considered, leading to better curve decomposition results. To validate the effectiveness of the proposed method, a module for automatic recognition of machining geometric features based on STEP files has been developed. Results show that the method enables the direct decomposition of complex B-spline curves and lays the foundation for subsequent intelligent process planning and programming.