Analysis of Band Curvature in Asymmetrical Rolling Process by FEM Method

Sayyaadi, Hassan; Yekta, Ramin; Motekallem, Abolfazl

doi:10.22034/ijcoe.2016.149271

Analysis of Band Curvature in Asymmetrical Rolling Process by FEM Method

Authors

¹ Ph.D, Sharif University of Technology/ Department of Mechanical Engineering

² M.SC Student, Sharif University of Technology/ Department of Mechanical Engineering

10.22034/ijcoe.2016.149271

Abstract

Today, the rolled products, i.e. sheet, plate and foil is used in marine applications, including platforms, hatch covers, mast, hulls of boats and superstructures on pleasure boats and the bridges and superstructures of passenger ships and merchant ships. In this paper, simulation of asymmetric cold rolling is presented by using explicit analysis procedure. In asymmetric cold rolling, the workpiese if often bent downwards or upwards. A two dimensional explicit dynamic finite element model with adaptive meshing technique has been employed to simulate asymmetrical condition are here due to different roll radii. To validate the simulation, the results of simulation and experiment are compared. Effects of asymmetry due to roll radii ratio and speed ratio mismatch on sheet curvature variations are discussed. Finally, optimum roll speed ratio in various of roll radii ratio could be found to produce flat sheet.

Keywords

20.1001.1.25382667.2016.1.3.6.7

References

[1] G. Sachs, L.J. Klingler, The flow of metals through tools of circular contour, J. Appl. Mech. 14 (1947) 88. [2] L. Holbrook, C.F. Zorowski, Effects of non symmetry in strip rolling, J. Eng. Ind. B88 (1966) 401. [3] G.E. Kennedy, F. Slamar, Turn up and turn down in hot rolling, in: Iron and Steel Engineer Yearbook, 1958, p.233. [4] S.A. Buxton, S.C. Browning, Turn up and turndown in hot rolling: a study on a model mill using plasticine, J. Mech. Eng. Sci. 14 (1972) 245. [5] W. Johnson, G. Needham, an experimental study of asymmetrical rolling, in: Applied Mechanics Convention, Institute of Mechanical Engineers, Cambridge, UK, 1966. [6] W. Johnson, G. Needham, Further experiments in asymmetrical rolling, Int. J. Mech. Sci. 8 (1972) 443. [7] P. Dewhurst, I.F. Collins, W. Johnson, A theoretical and experimental investigation into asymmetrical hot rolling, Int. J. Mech. Sci. 16 (1974) 389. [8] M.M. Kiuchi, S. Hsiang, Analytical model of asymmetrical rolling process of sheets, in: Proceedings of the 14th NAMRC, Society of Manufacturing Engineers, Minneapolis, 1986, p. 384. [9] J. Pospiech, a note on the influence of some factors affecting curvature on the flat rolling of strip, J. Mech. Work. Tech. 15 (1987) 64. [10] A.B. Richelsen, Elastic–plastic analysis of the stress and strain distributions in asymmetric rolling, Int. J. Mech. Sci. 39 (1997) 1199. [11] R. Shivpuri, P.C. Chou, C.W. Lau, Finite element investigation of curling in nonsymmetrical rolling of sheet, Int. J. Mech. Sci. 30 (1988) 625. [12] L.-S. Lu, O.-K. Harrer, W. Schwenzfeier, F.D. Fischer, Analysis of the bending of the rolling material in asymmetrical sheet rolling, Int. J. Mech. Eng. Sci. 42 (2000) 49. [13] Y.M. Hwang, T.H. Chen, Analysis of asymmetrical rolling by stream function method, JSME 39 (1996) 598. [14] M. Salimi, F. Sassani, Modified slab analysis of asymmetrical plate rolling, Int. J. Mech. Sci. 44 (2002) 1999–2023. [15] M. Pietrzyk, K. Wilk, H. Kusiak, Steady state FEM simulation of the strip bending in asymmetrical rolling process, in: Proceedings of the Metal Forming 93, Krynica, 1993, pp. 50–55. [16] S. Hamuzu, K. Yamada, T. Kawanmi, et al., Rigid plastic finite element analysis of asymmetrical rolling, in: D.R.J. Owen, E. Hinton, E. Onate (Eds.), Computational Plasticity, Pineridge Press, Swansea, 1987, pp. 1087–1096. [17] Y.M. Hwang, G.Y. Tzou, Analytical and experimental study on asymmetric sheet rolling, Int. J. Mech. Sci. 39 (1997) (1997) 289–303. [18] H.D. Hibbitt, B.I. Karlson, D. Sorensen, HKS Inc. Rolling of Thick Plates (1.3.6), Abaqus/Explicit 6.4, 2004. [19] M. Salimi, A. Forghani, Prediction of product curvature in rolling with asymmetric condition, in: The Seventh ISME Annual Conference, Zahedan, Iran, April 14–16, 1999, pp. 1485–1493 (in Persian).