Oginskyi I. The development of flat-and-edge rolling theory and development of technological processes to produce shapes basing on multiroll gauges

The thesis is devoted to a comprehensive study of the effect of process variables on the kinematic and energy-power parameters in the process of rolling simple and shaped sections in the double roller and multiroll gauges, the development of technological processes on the basis of multiroll gauges. Methods of research of volumetric displacement of the metal during rolling based on finite volume method have been developed. A model of three-dimensional displacement of the metal, which eliminates the use of flat flow, has been developed. The formation mechanism of the displaced volume during rolling has been specified. The calculation method of the rolling parameters on the basis of volumetric parameters has been further developed; the expediency of development of methods based on the displaced volume has been grounded. A new method to determine the torque of rolling has been developed. Theory of rolling in the rolls of unequal diameter has been further developed. A method to determine the position of the rolled sheet in rolls during asymmetrical rolling has been designed. A method to determine the ratio of the torques on the rolls in the process of rolling in the asymmetric gauges has been established. The experimental researches to verify the adequacy of the developed models and validation of theoretical propositions has been studied. On the base of the completed development applications have been solved: creation of new technological solutions, new types of aggregates and units of rolling equipment have been developed