Abstract
Hammering hydroforming is known as an effective method of improving formability in tube hydroforming. However, the factors that cause the improvement are still unclear. This paper presents finite element simulations of hammering hydroforming of an automotive component by the static explicit FEM code, which was developed in this study. The simulated results were compared with those of experiment and showed a good agreement, and this confirmed the validity of the hammering hydroforming simulation by the developed code. The factors that improve the formability were also investigated by simulation. It was clarified that the effect of axial feeding from the edge on the breakage zone improved and as a result thinning decreased.
