| Research on method of constraint conversion in feature-based data exchange between heterogeneous CAD systems
Tie-qiang MA
The Journal of Mechanical Science and Technology, vol. 23, no. 1, pp.246-253, 2009
Abstract : Data exchange between heterogeneous CAD systems is the key problem in the field of CAD, and the popular solution
to this problem is a feature-based method. Aiming at keeping the consistency of design intent in data exchange
between heterogeneous CAD systems, this research focuses on the method of constraint conversion. First, two kinds of
basic feature transformation ways are summarized, and this is the foundation of constraint conversion. Second, a novel
identification of geometric elements based on the improved geometric certificate is proposed, and the identifier of
geometric element is used to recognize the acting object of constraint. Third, the principles of constraint conversion are
put forward, and the method of constraint conversion for a single feature is proposed according to the principles. Fourth,
an algorithm of constraint conversion for the whole process of CAD data exchange is designed. Finally, the contrast
experiment of CAD data exchange is completed, and the result of the experiment shows that the approach mentioned
above is effective.
Keyword : Heterogeneous; CAD; Constraint; Data exchange; Feature |
