Abstract: In this paper a numerical method for simulating the pressure forming of visco-plastic sheet metal under plane strain condition was presented based on the previous work of the authors’ and the related literature. The proposed method is not only able to simulate the processes under constant pressure but also to determine the optimal loading pattern in order to keep the strain rate approximately unchanged during the processes. The results obtained by applying the proposed method to some processes were consistent with the data found in the literature. The achievements of this study may serve as a guide to define the process parameters for the relevant processes.

Key words: 气压成形, 数值计算法, 粘塑性板材