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In this paper, a full sequence of manufacturing process of outer race of the first generation hub bearing for passenger’s car is simulated with emphasis on tracing metal flow lines. The importance of metal flow lines in forging of the bearing is emphasized to enhance structural rigidity and product quality of bearings. A viscoplastic finite element method is employed with a special scheme of tracing the metal flow lines. The predictions are compared with experiments, revealing that they are in good agreement with each other. The final metal flow lines are evaluated considering the function of the first generation bearing outer race. * All Bearing Belover’s Academy **    †   E-mail : msjoun@gnu.ac.kr TEL : (055)772-1624 FAX : (055)772-1624        .  ,     ,     ,               .         .      3    1             . 2.      Fig. 1       . Fig. 1(a), Fig. 1(b), Fig. 1(c), Fig. 1(d)   , , ,      . 5 9 .8 m m 2 7 .8 m m

Effect of Flow Stress, Friction, Temperature, and Velocity on Finite Element Predictions of Metal Flow Lines in Forgings