Thermal shear behavior in deformation phase of axisymmetric upsetting

초록

The generalized energy equation was investigated for an incompressible fluid film in homogeneous deformation phase of axisymmetric upsetting process with a perfectly plastic material. A reduced form of energy equation was used for the heat transfer problem of convection coupled with conduction mode in the lubricant film. The effect of convection denoted by Peclet number and the temperature difference between tool and workpiece was parametrically investigated on the temperature distribution and inhomogeneous shear motion in the film. The results of present model problem indicate that the localized thermal shear across the lubricant film depends mainly on the reduction in height and the degree of convection induced by sliding motion between tool and workpiece.

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