ASPECTS OF VERIFICATION AND OPTIMIZATION OF SHEET METAL NUMERICAL SIMULATIONS PROCESS USING THE PHOTOGRAMMETRIC SYSTEM

Abstract

The paper presents the use of photogrammetric system for verification and optimization of the
numerical simulation of sheet metal forming process. The use of GOM Argus photogrammetric
system allowed determining the real values of the analyzed drawpiece strains, construction of
real Forming Limit Curve (FLC) and comparing them with the limit strain values resulting from
the FLC. The knowledge of the drawpiece real strain distribution in the sheet metal forming
optimization process allows, by using the numerical simulation in the eta/Dynaform commercial
software, to estimate the optimum value of the friction coefficient that was taken into account in
the numerical simulation. The GOM Argus system was also used to assess the impact of selected
technological parameters on the accuracy of sheet metal forming drawpiece shape in comparison
with the theoretical CAD model. An attempt to optimize the process to obtain the correct
geometry of the drawpiece has been also carried out.