Computer Simulation of Double-Threaded Rolling in Production of Grinding Balls with a Diameter of 100 mm from Alloy Steels

At the moment, two-way rolls are used when rolling balls with a nominal diameter of 100 mm. In the process of rolling balls, due to the use of two-pass calibration, an increased vertical angle of inclination of the rolls is used. When working at such angles, the tangential stresses increase. The production of balls with a diameter of 100 mm on rolls with two-pass calibration with increased wear of the surface of the edges leads to the appearance of characteristic defects on the surface of the balls. This article presents a simulation of the ball rolling process, an analysis of the stress-strain state of the rolling process is carried out. The SSA calculation of the current calibration of rolls for rolling grinding balls with a diameter of 100 mm was carried out in order to analyze and compare with the existing rolling technology. According to the simulation results, it was found that when using the calibration of rolls with a constant step of cutting edges, in general, there is a fairly high level of stress throughout the entire volume.