Sketch Template Based Parametric Modeling in Reverse Engineering

AbstractIn this paper, a sketch template based parametric modeling technology is proposed in the field of reverse engineering. With this technology, a sketch template representing the key features of a family parts’ profile is firstly established while capturing design intentions through constraints imposed among the geometric objects. Then this sketch template is matched and best fitted to the cross sectional points of the profile as well as satisfying all the constraints. The final parametric solid model can be created based on the optimized sketches. The main contribution of this paper is the comprehensive study on the sketch optimization with a broad extension on both types of engineering constraints (including geometric and dimensional constraints) and geometric objects (including point, line, arc, conic and B-spline curve). The real examples have demonstrated that this technology is of great significance and success in practical industrial applications.

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