多特征曲面冲压广泛应用于汽车、航空航天等重要领域。曲面加工时多特征冲压力、压边力的协同作用，导致成形过程功率需求急剧上升，带来装备吨位大、功率不匹配、运行能效低等一系列突出问题。实践表明，冲压过程能耗由工艺能量和装备能效共同决定，仅考虑装备层的优化存在局限性，亟待研究其工艺能量特征及高能效的压边力优化方法。为此，本项目在多特征曲面冲压成形过程中引入电磁分布式压边，研究其电磁/热/力耦合作用关系，阐明多特征曲面形状约束下电磁压边的分布式产生机制；揭示成形过程多特征的应力应变特性对工艺能量的影响规律，建立多特征形状参数及冲压时序驱动的工艺能量模型；探究高能效冲压成形过程的电磁分布式压边力优化方法，实现冲压能耗与成形质量的均衡调控，并进行实验与应用验证。项目的研究不仅能够为多特征曲面冲压成形高端装备设计提供重要的理论方法和技术支撑，而且对实现冲压成形的高能效控制具有较强的实践意义。

Multi-feature surface stamping is widely used in many important fields, such as automobile, aerospace, etc. The synergistic effect of forming force and blank holder force to simultaneously deform several features leads to the sharp rise of power demand. It brings a series of problems, such as large tonnage of equipment, power mismatch, low energy efficiency during operating, etc. The practice shows that energy consumption in the stamping process is determined by both process energy and the energy efficiency of the equipment. Only optimizing the efficiency at the equipment level is limited, it is urgent to study the characteristics of the process energy and improve the energy efficiency to generate blank holder force. Therefore, focusing on the deformation process of the multi-feature surface during stamping, the electromagnetic distributed blank holder will be studied. The coupling relationship between the electromagnetism, thermology, and mechanics of the electromagnetic blank holder will be studied to distribute the holder with the constraint of the shape of the multi-feature surface. The influences of stress-strain state of the multi-feature on process energy will be explored to establish the model driven by the parameters of all features and their stamping sequence. The distributed blank holder force during deformation will be optimized to improve the energy efficiency and forming quality of the stamping process. The experiment and the application will be performed to validate the effectiveness. This research provides theoretical and technical supports to design advanced equipment for multi-feature surface stamping, which is of practical significance to improve the energy efficiency of the stamping process.