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A method for the numerical analysis of the lubricated skin pass rolling of tin plates with bright work rolls is established considering a noncircular deformation of the work rolls. A discontinuous elongation behavior with a rolling load unique to lubricated skin pass rolling of tin plates with bright work rolls, known as the jumping phenomenon, has been simulated with constitutive equations of a rolled material having upper and lower yield stresses. The results of the analysis show good agreement with the experimental results obtained under the same rolling conditions with adequate modeling of the constitutive equations of the rolled material. The hysteresis behavior in the relationship between elongation and rolling load has been explained as a bifurcation phenomenon between two different mechanical states: one has a larger elastic strain energy accumulated in the rolled material and work rolls with a smaller elongation in the rolled material, and the other has a smaller elastic strain energy in the rolled material and work rolls with a larger elongation in the rolled material.

Lubricated Skin Pass Rolling Characteristics of Tin Plate with Bright Work Rolls