Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Analysis of Billet Rolling in a Continuous Mill using Idle Vertical Stands

  • Laila S. Bayoumi (Department of Mechanical Design and Production, Cairo University) ;
  • Lee, Youngseog (Department of Mechanical Engineering, Chung Ang University)
  • Published : 2004.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

An analytical approach is presented to investigate the deformation characteristics of billets in a continuous billet mill using power driven horizontal stands and idle vertical stands. The analysis is validated by comparison to the experimental results in a previously published work. The analytical results have shown that, apart from the problems of slip and buckling of billet, there are some shortcomings involved in this method. Compared to conventional rolling with all driven stands, the roll load for idle vertical stands and the rolling torque for horizontal stands are almost doubled. The billet is severely stressed within the roll-bite of idle vertical stands and the overall rolling power has increased by one third of that for conventional rolling. Theseshortcomings impair the feasibility of industrial application of idle vertical stand rolling method.

Keywords

References

  1. Kandaurov, L. E., Makarchuk, A. A., Maslennikov, V. A., Kabanova, V. P. and Barsukov, V. G., 1989, 'Modelling of Grooveless Rolling in Roughing Tranin of Bar Mill,' Steel in the USSR, 19, p. 222
  2. Kennedy, K. F., 1987, 'A Method for Analyzing Spread, Elongation and Bulge in Flat Rolling,' Transactions of the ASME, Vol. 109, pp. 248-256 https://doi.org/10.1115/1.3187126
  3. Komori, K., 2002, 'An Upper Bound Method for Analysis of Three-Dimensional Deformation in the Flat Rolling of Bars,' Int. J. Mech. Sciences, 44, pp. 37-55 https://doi.org/10.1016/S0020-7403(01)00086-8
  4. Laila, S., Bayoumi and Youngeog Lee, 2004, 'Effect of Interstand Tension on Roll Load, Torque and Workpiece Deformation in the Rod Rolling Process,' Journal of Material Processing Technology, 145, pp. 7-13 https://doi.org/10.1016/S0924-0136(03)00581-8
  5. Mori, K. and Osakada, K., 1990, 'Finite Element Simulation of Three-Dimensional Deformation in Shape Rolling,' International Journal for Numerical Methods in Engineering, 30, p.1431 https://doi.org/10.1002/nme.1620300807
  6. Oh, S. I. and Kobayashi, S., 1975, 'An Approximate Method for a Three-Dimensional Analysis of Rolling,' Int. Journal of mechanical sciences, Pergamon Press, pp. 293-305 https://doi.org/10.1016/0020-7403(75)90010-7
  7. Park, J. J. and Oh, S. I., 1990, 'Application of Three Dimensional Finite Element Analysis to Shape Rolling Processes,' Journal of Engineering for Industry, 112, p. 36 https://doi.org/10.1115/1.2899293
  8. Patent, U.S., No. 466929311
  9. Shida, S., 1969, 'Empirical Formula of Flow Stress of Carbon Steels-Resistance to Formation of Carbon Steels at Elevated Temperature, 2nd report,' (in Japanese), J. JSTP, 10, pp. 610-617
  10. Shikano, H., Kusaba, Y. and Hayashi, C., 1991, 'Characteristics of Rolling in a Continuous Mill with Drive-free Vertical Rolls,' ISIJ Int. 31, pp. 614-619 https://doi.org/10.2355/isijinternational.31.614
  11. Yanagimoto, J. and Kiuchi, M., 1991, 'Three-Dimensional Coupled Simulation of Strip and Shape Rolling Processes,' Transactions of the MAMRI/SME, 19, p. 15
  12. Yanazawa, T., Tanaka, T., Noda, A., Morita, T., Takeda, R. and Hayashi, H., 1983, 'Development of Grooveless Rolling,' Transactions of Iron and Steel Institute of Japan, 23, p. 710 https://doi.org/10.2355/isijinternational1966.23.710