阶梯特征钣金件多道次双点渐进成形策略

Development of a Multi-Pass Double Side Incremental Forming Strategy for Forming Complex Sheet Metal Parts With a Step Feature

针对复杂钣金件采用单点渐进成形技术加工时会产生几何精度低和板厚分布不均的问题,提出了一种多道次双点渐进成形策略.以2种典型的复合圆台形件为研究对象,基于多道次双点独立或协同运动方法,合理规划加工区域并设计出适当的中间过渡轮廓,最终形成多道次双点渐进成形策略.通过将新的双点成形策略与传统单点渐进成形结果进行对比分析,结果表明,在工艺参数相同的情况下,与单点渐进成形技术相比,新的策略成形出的成形件的轮廓精度更高,厚度减薄率明显降低,厚度分布更均匀.

Geometric inaccuracy and uneven thickness distribution are the two major challenges in incremental sheet forming （ISF）. To overcome these problems, a novel multi-pass double side incremental forming （DSIF） strategy was proposed in this paper. In this approach, the principles of electric field meth- od and the equal-potential lines were employed. The experiments of two complex parts with a step feature suggest that by using the multi-pass DSIF strategy, a higher geometric accuracy and more uniform thickness distribution can be obtained.