Comparative Study for Springback Prediction on Single Point Incremental Forming Process

Abstract

The present paper proposes a comparative study in order to determine the springback in single point incremental forming process. Using the Ls-Dyna software the process was simulated for one piece in frustum of pyramid shape. In the end of the explicit dynamic analysis, it was run, using the same software, an implicit analysis to determine the springback. For this comparison study we selected four different shell formulations. The results obtained in this simulation were compared with those obtained experimentally for the same part. The experimental research was conducted on a robot and, on the opposite side of the machined surface, an Aramis measuring optical system was placed to allow the online determination of deformations, displacements and thinning of material. Also, using this system, the springback was determined at the end of forming process. The closest values were obtained when using fully integrated formulation with thickness-stretch with 11 integration points on material thickness.

Shape Accuracy in Single Point Incremental Forming of Conical Frustums from Titanium CP2 Sheets

“…The two-stage SPIF was very effective in increasing the geometric accuracy of the EN AW-5052 aluminium alloy conical drawpieces. Oleksik et al (2014) predicted springback of DC04 steel parts using the ARAMIS computational system. The lowest amount of springback is found in the opposite corner of the frustum of pyramid, compared to the corner where the maximum value of springback appears.…”