Multi-point forming with individually controlled force–displacement (MPF-ICFD) is a novel multi-point forming process with characteristics of good deformation uniformity and high forming accuracy. The process has two different deformation sequences: positive forming (PF) and negative forming (NF). The shape accuracy of a part is significantly different when the deformation order is changed. To reveal the influence mechanism of the deformation sequence on shape accuracy, experiments and numerical simulations are used to assess shape accuracy during multi-point forming. The deformation behaviours of a cylindrical surface, sail surface and saddle surface in PF and NF processes are investigated to obtain the shape accuracy characteristics of a sheet under different deformation sequences. In addition, the strain distribution characteristics of the cylindrical surface are given quantitatively. The influence mechanism of the deformation sequence on the shape accuracy is revealed. The results show that the amount of plastic deformation on the part is significantly increased and the shape accuracy is significantly improved during the PF process. When the loading conditions are identical, the maximum strain of the cylindrical parts is increased by 73.4%, and the amount of springback is decreased by 90.0%. The above research indicates that the PF process has good application prospects in sheet metal forming.

单独控制力-位移多点成形（MPF-ICFD）是一种新颖的多点成形工艺，具有变形均匀性好、成形精度高的特点。该工艺有两种不同的变形顺序：正向成形（PF）和负向成形（NF）。当变形顺序改变时，零件的形状精度显着不同。为了揭示变形序列对形状精度的影响机制，采用实验和数值模拟来评估多点成形过程中的形状精度。研究了圆柱面、帆面和鞍面在PF和NF过程中的变形行为，以获得板材在不同变形序列下的形状精度特性。此外，定量给出了圆柱表面的应变分布特征。揭示了变形顺序对形状精度的影响机制。结果表明，PF工艺过程中零件的塑性变形量显着增加，形状精度显着提高。当加载条件相同时，圆柱件的最大应变增加了73.4%，回弹量减少了90.0%。上述研究表明PF工艺在板材成形中具有良好的应用前景。