NUMERICAL AND EXPERIMENTAL DETERMINATION OF SPRINGBACK IN U-BENDING PROCESS

Abstract

The most common problem in area of bending technology is problem of achieving accurate and repeatable bending angle. This problem is caused by elastic springback. Springback can be defined as an elastically-driven change of shape of the deformed part upon removal of external loads. This phenomenon is observed also in other sheet metal forming processes. Several technological parameters influence springback amount. In this paper were presented results for different bending curvature and its influence to the springback amount sprinback. Difference between springback amount caused by Bauschinger effect was also discussed. Process was also modelled in the static implicit finite element (FE) code - Autoform. In this paper were used two different materials - UHS and mild steel. Experimental and numerical results were compared and discussed.

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