In the context of weight reduction for new car design, it is essential to downsize, or rather optimize, the Body In White (BIW) structure. A very effective approach is to take into account the influence of Manufacturing process in the performance analysis such as crash or fatigue. Further, integrating the interaction between Stamping and Crash performance should also improve the predictability of the CAE approach and lead to more efficient design. One-step simulation of sheet metal forming is a very promising technology for this application, as it can be used on the same mesh as crash analysis and can work with a simplified dieface. However, a Dieface, although simplified, must be generated for nearly all parts of the vehicle model. Hence, the implementation of product-process coupling on an industrial scale requires the development of methodologies for automatic dieface design imbedding sheet metal forming expertise. Dieface generation depends on the geometrical features of the part, but we understand the latter only if we have a framework in terms of dieface features. The authors show that such a development requires an innovative approach to stamped part classification, based both on the geometrical features of the part and on the possible strategies in dieface development. Beside its novelty, this classification has the advantage of using a decision tree based only on a vector of quantitative features, thus making it possible to implement it in automatic decision support software. An application based on a real world BiW is presented.

在减轻新车设计的重量的背景下，必须缩小或优化白车身（BIW）的结构。一种非常有效的方法是在性能分析中考虑制造过程的影响，例如碰撞或疲劳。此外，整合冲压和碰撞性能之间的相互作用还应该提高CAE方法的可预测性，并导致更有效的设计。钣金成型的一步式仿真是此应用程序非常有前途的技术，因为它可以与碰撞分析在同一网格上使用，并且可以使用简化的模具工作。但是，尽管简化了Dieface，但必须为车辆模型的几乎所有零件生成一个Dieface。因此，在工业规模上实施产品-过程耦合需要开发自动模具设计的方法，其中包括钣金成型专业知识。模具表面的生成取决于零件的几何特征，但是只有在我们具有模具表面特征的框架的情况下，我们才能理解模具的几何形状。作者表明，这种开发需要一种创新的方法来进行冲压零件的分类，既要基于零件的几何特征，又要基于冲模开发的可能策略。除了新颖性之外，这种分类还具有仅基于定量特征向量使用决策树的优势，因此可以在自动决策支持软件中实现。提出了一个基于现实世界BiW的应用程序。