多点分段成形中的几种成形方法

Several Forming Methods in Step-by-Step Multi-Point Forming

研究了柱面多点分段成形时板材易于产生的缺陷及其产生原因。在分段成形后，试件能否与目标形状相吻合是衡量板材成形效果的重要标准。基于板材的变形规律，通过成形实验探讨了有重叠区与无重叠区的成形方法、影响区形变协调成形方法和多道分段成形方法。

This paper describes the occurring defects and their mechanism when forming a plate into cylinder shape with step hy-step multi-point formlng method. After the plate being formed, the important criterion to measure the plate formability indicates whether the part ls identical with the goal shape. Based on the defor mation characteristics and forrning laws of the plate, the paper explores several forming methods for obtaining a good product by some experiments, which are di forming method without overlap area, ② forming method with overlap area, ③ deformation accordance method in the transition area and ④step-and-repeat forming method.