Additional Effect of Elastoplastic Alternating Deformation on the Properties of Metallic Materials during Their Processing on a Roll Leveling Machine

The only way to increase the effect of elastoplastic alternating bending on the properties and the structure of metallic materials is to extend the minimum entry gap set by the nomogram of an EcoMaster (R) 25 roll leveling machine. An analysis of the position of the working rolls when they touch each other and after the formation of a gap between them shows that straightening is still possible if the entry gap is reduced by 30% from the nomogram limits. Analytical dependences for determining the entry gap at any thickness of strips or sheets in the range 1-3 mm are built. This range is characterized by a particularly effective manifestation of the total equivalent intensity of the principal true strains. The additivity of this deformation effect on metallic materials (along with the principal true strain intensity) is proved; therefore, it can be considered as a measure of cumulative strain.