复合弯曲成形是一种高柔性的板料成形工艺。运用有限元方法分析了模切板刀片的复合弯曲成形， 对成形过程中的回弹进行了研究。建立了外环转角与弯曲回弹角度的关系， 分析了内环圆角半径对回弹的影响， 对模切板刀片的成形具有一定的指导意义。 Composite bending forming is a highly flexible sheet forming process. The composite bending of the cutting board was analyzed by finite element method, and the rebound in the forming process was studied. The relationship between the corner of the outer ring and the angle of the bouncing rebound was established. The influence of the fillet radius of the inner ring on springback was analyzed, which is of guiding significance to the forming of the dieboard.