Abstract
The influence of part geometry on twist springback was studied by a A-pillar inner plate. The part structural parameters was divided into cross-section and longitudinal axis, and the response surface model was established to analyze the influences of various structural parameters on the twist springback. The results show that the straight line 1, straight line 3, angle 2 and angle 4 of the cross section have a significant effect on the twist springback. In addition, the twist springback increases continuously with increasing of total length and ratio of arc to straight line and the decreasing of radius in the longitudinal axis. After adding features through the angular edges along the longitudinal direction, the maximum springback at the part end drops from -10.92mm to -2.934mm. The springback robustness analysis of this part were also analyzed, the results show that the maximum springback is strongly related to material yield strength, and the robustness is improved greatly after adding part features.
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