The research of forging process of eccentric part on three slide forging press

In this paper the results of theoretical and experimental tests of eccentric part forming on a three slide forging press (TSFP) are presented. The application of tools with a recess in the lower clamping dies results in asymmetric material flow during upsetting which causes the eccentric forming. Theoretical analyses of this process were made with the application of 3D FEM simulation. Based on theoretical results, it was stated that the eccentricity e depends on length L and angle α of the recess in the lower clamping dies. The area of process stability is limited by the absence of eccentricity (with low α and L values) and the presence of overlaps (in the case of α and L being too large). The theoretical dependence between eccentricity value e and tool geometry parameters L and α was obtained. The experimental tests confirmed a good agreement between theoretical and experimental results.