Prediction of spread in hot flat rolling under variable geometry conditions
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Geometric deformation of steel blanks having a smoothly varying rectangular cross section under hot flat rolling was experimentally investigated. Specimens of different initial geometries were used. The experimental results were then utilized to develop mathematical expressions which represent the variant nature of the deformation process. These expressions were incorporated in El-Kalay and Sparling’s conventional steady-state spread formula. The resulting empirical formula related spread to the relevant process variables under the unsteady-state rolling conditions. The application of this formula is the process planning for manufacturing of a class of industrial components by rolling—whose distinct feature is the gradual change of cross-sectional size along the length.
KeywordsModify Prediction Height Variation Specimen Type Heavy Scale Material Shaping Technology
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- 1.T. Altan, S.I. Oh, and H.L. Gegel:Metal Forming: Fundamentals and Application, American Society of Metals, 1983, p. 249.Google Scholar
- 3.F. Sassani and N. Sepehri: Computer-Aided Rolling of Parts with Variable Rectangular Cross-section,Proceedings of International Conference on Computer-Aided Production Engineering, Edinburgh, April 1986, pp. 161–165.Google Scholar
- 4.Z. Wusatowski: Hot Rolling: A Study of Draught, Spread and Elongation,Iron and Steel, 1955, 28 (Feb. and March), pp. 49–54 and 89–94.Google Scholar
- 5.R. Hill: Private Communications with Helmi and Alexander (Ref. ).Google Scholar
- 7.A. Helmi and J.M. Alexander: Geometric Factors Affecting Spread in Hot Flat Rolling of Steel,J. Iron Steel Inst., Nov. 1968, No. 206, pp. 1110–1117.Google Scholar
- 8.A.K.E.A. El-Kalay and L.G.M. Sparling: Factors Affecting Friction and their Effects upon Load, Torque, and Spread in Hot Flat Rolling,J. Iron Steel Inst. Feb. 1968, No. 206, pp. 152–163.Google Scholar
- 12.G.J. Li and S. Kobayashi: Spread Analysis in Rolling by the Rigid-Plastic Finite Element Method,Proc. Conf. Num. Method in Industrial Forming Processes, Pineridge Press, 1982, pp. 777–786.Google Scholar