Process-induced residual stresses significantly influence the mechanical properties of a formed component. A polymer pad is used as a flexible die in two-point incremental forming to induce compressive residual stresses in the component during the forming process. Experimental and numerical results illustrate the influence of compressive stress superposition on the component properties. It is shown that the active support, using a geometry-independent polyurethane die, causes beneficial compressive residual stresses on the tool side compared to the tensile residual stresses induced by the single-point incremental forming process without such a supporting die.

中文翻译：

---

通过增量钣金成形中的柔性应力叠加来调整残余应力

过程引起的残余应力会显着影响成型零件的机械性能。聚合物垫在两点增量成型中用作柔性模具，以在成型过程中在组件中引起压缩残余应力。实验和数值结果说明了压缩应力叠加对部件性能的影响。结果表明，与不使用支撑模具的单点增量成型工艺所产生的拉伸残余应力相比，使用与几何形状无关的聚氨酯模具的主动支撑在工具侧产生有利的压缩残余应力。