汽车车身冲压工艺与模具关键技术研究

介绍了作者在汽车车身冲压工艺与模具关键技术研究方面的重要进展，主要包括斜拉延筋工艺方案，模块化模具设计技术和快速模具制造技术等。斜拉延筋工艺方案使拉延筋不仅具有控制材料流动阻力的功能，还有引导材料按期望的方向流动的功能，从而能有效地消除拉延成形中的起皱和拉裂。模块化模具设计技术将车身零件根据其结构特征进行分类，然后对同类零件的模具进行模块化分解，并建立相应的模块化设计数据库以提高设计效率，同时为设计制造过程的并行化提供便利。快速模具制造技术则以CAD/CAM技术为基础，将大型汽车车身模具分成平面组件和曲面组件，并采用专用装备实现这些组件的快速制造，然后用专用装备实现模具组件的组焊。工程应用实例表明，上述技术的综合运用可显著缩短汽车车身模具设计制造的周期，降低成本，并保证中小批量生产的品质要求。

RESEARCH ON KEY TECHNIQUES FOR SHEET METAL FORMING OF AUTOMOTIVE BODY COMPONENTS

Presents recent progresses of authors research on key techniques for sheet metal forming of automotive body components. Topics discussed include the skew―drawbead technique, the module―based design method of moulds and the rapid manufacturing technique based on modulization and welding of the moulds. The skew―drawbead technique makes the drawbead not only provide resistance to material flow but also guide the material flow in desired direction to avoid possible wrinkles and/or fractures in the forming process. The module―based design method designs the mould as an assembly of modules which may be designed and manufactured independently to facilitate the whole design and manufacturing process. The rapid manufacturing technique manufactures the modules automatically with specially designed devices and assemblies the modules via automatic welding equipments. Engineering applications show that the technique can reduce the total design and manufaeturing time by up to 30% while maintaining desired quality of the formed components.