目的针对自由回弹采用的补偿法寻找最优解过程繁杂,结果不稳定这一问题,寻找更为有效的折弯方式。方法利用Pearson相关系数和灰色系统理论,采用对比实验,以16 mm厚Q345钢为研究对象,选择凸模圆角、摩擦因数及矫正量为变量,回弹角与最大成形力为目标函数,求得工艺参数对回弹角的关联系数。再对优化的参数组合进行有限元模拟验证。结果矫正法回弹控制效果远远优于自由折弯模具的回弹控制效果。结论将优化获得的工艺参数进行有限元模拟验证,指导设计、试模,成形质量得到明显提高,对实际生产具有显著的指导意义。 Aim To solve the problem that the optimal solution process is complicated and the result is not stable, the compensation method adopted for free rebound is to find a more effective bending method. Methods Based on the Pearson correlation coefficient and the gray system theory, a 16 mm-thick Q345 steel was chosen as the research object by comparative experiments. The results showed that the fillet radius, the friction coefficient and the corrective volume were the variables, the rebound angle and the maximum forming force were objective functions Correlation coefficient of process parameters to rebound angle. Then, the optimized parameter combination is verified by finite element simulation. Results Correction method rebound control effect is far superior to the free bending mold rebound control effect. Conclusion The optimized process parameters are validated by finite element simulation. The quality of the guide design, trial mold and forming are obviously improved, which has significant guiding significance for actual production.