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介绍了一种板料渐进弯曲成形的方法及其设备，并运用有限元法对板料的渐进弯曲成形过程进行了较为全面的研究，主要分析了渐进弯曲过程中的回弹问题。以模切板刀片的渐进弯曲成形为例，分别建立了外环转角与板料弯曲角度、板料弯曲回弹角度的关系。通过控制弯曲成形过程中不同的工艺参数，对渐进弯曲成形过程进行了有限元仿真。
A method and equipment for gradual bending forming of sheet metal are introduced. The progressive bending forming process of sheet metal is studied by using finite element method. The springback problem in progressive bending process is mainly analyzed. Taking the progressive bending forming of the die cutting blade as an example, the relationship between the outer ring rotation angle and the bending angle of the sheet and the bending rebound angle of the sheet are respectively established. By controlling the different process parameters during the bending process, the finite element simulation of the progressive bending process is carried out.