Ural Federal University (Ekaterinburg, Russia):

Yu. D. Gorbunova, Engineer, Post-graduate
G. A. Orlov, Dr. Eng., Prof., e-mail: grorl@mail.ru

The results of computer simulation of the process for hot stamping elliptical bottoms using the finite element method in the DEFORM-3D application package have been presented. The simulation was carried out for 12Kh18N10T austenitic steel at the initial billet temperature of 1100 °C. The material was adopted as rigid plastic with strain-rate hardening, and the friction stresses on the contact surfaces were calculated according to Siebel law. The main attention was paid to the study of changes in wall thickness along bottoms generatrices. The basic laws of the shape change of the bottoms depending on technological factors were described. The results of calculations of the indicators of a stress-strain state and metal damage by volume of the bottoms were presented. An experimental verification of the calculated data was carried out by comparing the stamping and forming forces of the bottoms, which showed accuracy sufficient for technological calculations. Based on the studies, the possibility and expediency of using computer modeling to fi nd ways to improve the stamping process and reduce the metal consumption of products was shown.

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