Summary
— When the pressing velocity of the pressure roll in ring rollinq is considered, dual velocity fields should be used to more accurately calculate an upper-bound to the torque required to be supplied by the driving roll A kmematically admissible velocity field is derived in this paper by super-posmg the pressing velocity components onto the longitudinal velocity components of the ring being rolled as induced by the driven roll. An upper-bound lower than that obtained in ref /8/ for the necessary torque is obtained on the basis of the proposed dual velocity field. When the pressing velocitv is not small as is the case in the stage of coarse ring rolling its effect on the torque is not negligible. The computed results are compared with the experimental data and it is shown that the proposed dual velocity field does indeed better predict the roll torque than does that which neglects the Dressina velocity of the pressure roll. pressing
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References
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© 1984 Macmillan Publishers Limited
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Ryoo, J.S., Yang, D.Y., Johnson, W. (1984). Ring Rolling; the Inclusion of Pressure Roll Speed for Estimating Torque by Using a Velocity Superposition Method. In: Davies, B.J. (eds) Proceedings of the Twenty-Fourth International Machine Tool Design and Research Conference. Palgrave, London. https://doi.org/10.1007/978-1-349-81247-9_3
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DOI: https://doi.org/10.1007/978-1-349-81247-9_3
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