Contact problems of the theory of roller squeezing of leather
Abstract
In the process of roller pressing of a leather semi-finished product, two phenomena occur simultaneously - contact interaction and moisture filtration. This, in turn, requires the joint solution of two types of problems - contact problems and hydraulic problems. The main contact problem of the theory of roller pressing of wet materials is the mathematical modeling of the shape of the contact curves of the rollers and the regularities of the distribution of contact stresses along the contact curves of the rollers. The article deals with the basic contact problems of the theory of roller squeezing of leather. A formula was derived that describes the model of friction stresses. It was revealed that the shapes of the roll contact curves of the two-roll module do not depend on the change in the moisture content of hides in the contact zone of the rollers. It was established that the model of friction stresses in a two-roll module for pressing leather does not depend on the inclination of the material layer fed to the center line.