A METHOD OF OPERATING A CAD SYSTEM MODEL FOR MODELLING AN ARTICLE TO BE MANUFACTURED

摘要

A method of operating a computer aided design (CAD) system model for modelling an article to be manufactured comprises receiving (60) a representation of the article, receiving (61) constraints for the article, determining (62) a maximum permissible curvature of one or more parts of the article, measuring (63) the maximum curvature of the one or more parts of the article in the received representation and comparing (64) the measured maximum curvature with the maximum permissible curvature. If the measured maximum curvature of at least one of the one or more parts exceeds (67) the determined maximum permissible curvature, an error indication is provided (68). If the measured maximum curvature of each of the one or more parts does not exceed (65) the determined maximum permissible curvature, the received representation for the article is stored (66).