Tuning Parameters of a Ball-Rolling Mill for Rolling of Grinding Balls

Abstract—For rolling of balls, one of the main parameters for both calculating passes and developing a model for a roll is the roll spacing at the crossing point (zones where the edges of the rolls are as close as possible to each other) in addition to the roll diameter, the roll body length, and the section length. A method is developed to calculate the roll spacing at the crossing point. The calculation results are used to analyze and choose rational tuning parameters of rolls for rolling balls at the EVRAZ NTMK ball-rolling mill. The analysis is carried out on new rolls and rolls after the first, second, third, and fourth remachining of screw ball-rolling grooves. The data are systematized to plot point curves for tuning indicators, and the graphical data are used to make a polynomial approximation. Equations are derived for the functions of the tuning parameters.