本文具体讨论了基于特征造型的自由曲面特征设计与约束求解问题。
This paper mainly discusses the freeform feature design based on the feature modeling and its constraint solving.
自由曲面是工业产品，尤其是飞机、汽车、摩托车等行业产品外形的重要特征。
Free form surface is most important feature to shape of product such as plane, automobile, motorcycle.
最后按照规则曲面、扫掠曲面、自由曲面的顺序进行特征的自动识别。
Lastly, feature recognition is implemented automatically according to the sequence of regular surfaces, swept surfaces and free-form surfaces.
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