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The results of theoretical analysis of metal forming process of hub forging from AZ80 magnesium alloy are presented in this paper. Calculations were made with the applica- tion of commercial software based on finite element method. Simulations were conducted for two technologies of forging: on a die hammer and on a hydraulic press. Kinematics of mate- rial flow, strains, temperature and fracture criterion according to Cockroft-Latham were ana- lyzed. Forging force in the case of press usage and impact energy in the case of hammer us- age were calculated as well. On the basis of the obtained results, the analysis of limiting phe- nomena, which could appear during the process, was made. These phenomena include: pos- sibility of overlapping presence, not filling of die impression, overheating of material and cracks. On the basis of calculations of forces and energy necessary for forming, required pa- rameters of forging machines were chosen. Theoretical verification of hub part forging tech- nology allowed to state that it is possible to obtain final product of assumed quality. The re- sults of calculations provided the basis for planning of experimental tests in industrial condi- tions.

FEM ANALYSIS OF THE FORGING PROCESS OF HUB PART FROM AZ80 MAGNESIUM ALLOY