Prediction of spread in hot flat rolling under variable geometry conditions
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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