MODEL OF ROLLING RODS IN THE ROLL PASS OF THE OVAL-ROUND

Abstract

For modern high-speed rolling mills, stable and efficient operation is possible only with the use of automatic process control systems. Such systems involve the use of certain process models, both for control and technology development. Therefore, research aimed at improving existing models of the process of rolling rods and developing new ones remains relevant.
 The aim is to improve the model of the process of rolling rods of round cross-section using a system of passes "oval-round", suitable for the development of technology (determining the size of pass and power parameters) and as software for automatic process control systems.
 A characteristic difference of the proposed improved model is the application of the condition of volume constancy to determine not only the speed but also the deformation parameters of rolling. Features of the model also include the appointment of the ratio of the axes of oval passes and the use of the rate of mismatch in the interstand spaces to control and minimize tension.The sequence of calculations in the model includes an iterative procedure with three mandatory approximations, which involves adjusting the coefficients of elongation using the condition of constant volume, and adjusting the size of the workpieces using speed mismatch as a factor characterizing the corresponding tension or compressive.
 The model uses known expression and geometric relationships, the combination and sequence of which provides the definition of technological parameters and sizes of roll passes with the required accuracy. The program can be implemented in various forms depending on the needs, from the most common applications to environments of professional computer systems. The model can be used as a basis for the development of systems for automatic control of the rolling process for the conditions of the existing mills.