高强钢冷弯成型产品形状在线修正的研究。提出板材V型弯曲成型在线修正系统, 通过一个闭环反馈控制对成型角度偏差自动修正。-Research on Online Correction for Forming Error of Roll Forming. Based on the current research achievements of roll forming and the understanding of material properties, an online springback