INFLUENCE OF DIFFERENT FACTORS ON THE STABILITY BY ROLLING PROCESS IN THE WIRE BLOCK

One of the leading trends in the development of modern metallurgical manufacturing is the improvement of wire rod production using wire blocks. For existing continuous rolling mills, it is important to maximize the use of equipment capabilities both to improve the quality of products and to reduce the loss of metal and other resources for the adjustment and realize of technological modes at production. Effective technical solutions require scientific justification based on research results. To assess the boundary conditions of the stable rolling process, the average integral of the longitudinal forces at the plastically deformed metal is used. In physical terms, the vector of this force, which opposes the movement of the metal, cannot be directed along the motion of the sample, so the values of the force itself cannot be positive. The assessment of the longitudinal stability of the strip in the rolls (the possibility of a stable rolling process) is as follows: the process is implemented at negative values of the force value, zero value is the limit, at positive values the process is impossible. Analysis of the deformation process in the wire block of rolling mill 200 proved that the specific stresses in the stands should be insignificant because the resource of the forces that draw the metal into the rolls is limited. A more significant influence on the longitudinal stability of the process is the back tension. To ensure the stability of the process, especially in the first passes, the grip angle must be close in value to the coefficient of friction. With an increase in the coefficient of friction, the rolling of wire rod in the wire block becomes more stable. The results of the research show that in the case of external actions on the object, it is theoretically possible to find the limits of self-regulation for the rolling process in a wire block.Whenimplemented, thetechnique makes it possible to assess the limits of self-regulation not only by changes in the size of the workpiece, but by the amount of gauges wear in the rolls, in accordance with changes in friction conditions, temperature of the strip and other parameters.