Abstract:

FS(flanging simulation) system for automobile panels was developed based on the CATIA platform. This system introduced the idea of the mold structure travel diagram into FS, and took into account the flanging direction, drive angle and stroke's impact on flanging forming, which could truly reflect flanging movement relationships and effects of inserted cross-cutting on flanging. It made motion simulation by the way of animation, which could check interference of tool moving. It also achieved the CAD/CAE integration, which avoided losing model data and accuracy during the platform transformation.In the CATIA user-defined feature updating mechanism, this system can update CAD models and CAE models synchronously, which can save the CAE modeling time repeatedly during early stage of product design, improve the efficiency of the designers. Through analyzing specific case, the stability and accuracy was proved.

Key words: automobile panel, CATIA user-defined feature, synchronized simulation, structure travel diagram

摘要：

基于CATIA平台，开发了汽车覆盖件翻边成形模拟系统。系统将结构设计中模具结构行程图思想引入翻边成形模拟中，综合考虑了翻边方向、驱动角与翻边行程对实际工艺的影响，该系统可真实反映翻边运动关系，以及翻边镶块交刀对翻边成形过程的影响，并在求解计算前通过动画演示的方式进行运动仿真，对工具运动进行干涉检查。同时，系统将CAE模型作为CATIA的特征集成于CAD平台上，实现了CAD设计模型与CAE分析模型的同步更新，避免了平台转化过程中模型数据丢失与精度损失，缩短了CAE反复建模的时间，提高了设计效率。最后通过汽车后围外板的翻边实例分析，验证了系统的准确性和稳定性。

关键词: 汽车覆盖件, CATIA自定义特征, 同步模拟, 结构行程图