Abstract
A method of numerical simulation for hot caliber rolling is proposed, in which deformation of a material is analyzed in an ordinary manner by three-dimensional rigid-plastic FEM, while temperature distribution in the material is calculated using a new combined method of three-dimensional FEM, two-dimensional FEM and one-dimensional FDM. Moreover, residual stress of the material is analyzed by conventional two-dimensional elastic-plastic FEM. First, the calculated residual stress distributions due to the thermal stress distributions are found to agree well with experimental ones. Next, the method is applied to a simulation of the deformation and temperature in an actual H-shape rolling process, in which a H-shape is produced from a beam blank after 20 passes and strain and temperature distributions in cross sections are obtained. The calculated shape and temperature of the material are found to agree well with measured ones.
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