弯曲成形回弹研究进展

A Review of the Research on Springback in Bending

回弹是影响弯曲件成形质量的主要因素之一,是弯曲模具和弯曲工艺设计要考虑的关键问题之一。如果不充分了解弯曲回弹规律,要想获得预期精度的弯曲件,需要反复试模、修模,优化模具尺寸,或者在成形结束后还要对弯曲件进行校形,这样将会导致生产周期的延长,生产成本的提高。本文综述了前人对弯曲回弹问题的研究工作和研究成果,简述了弯曲回弹控制的方法,最后基于目前的研究现状,提出了弯曲成形回弹研究有待于进一步解决的问题。

Springback is one of the main problems which influences the quality of bending and should be considered at the stage of designing the bending die and process. In order to gain expected precision, it is necessary to repeatedly test, repair, optimize die or to modify bending part, which extend the production cycle and raise the cost of producion. The paper reviews the research on springback of bending, discusses the methods of controlling springback and points out the questions to be solved urgently.