Abstract:

In order to improve the uniform distribution of rolling fluid, and reduce the color differences along the roll width, internal structures and working principle of the evenness rollers were described firstiy. The factors affecting the uniformity of the rolling liquid were analyzed. A finite element analysis model of evenness rolls was built with ANSYS/LS-DYNA software. Numerical simulations of the finite element model of roll system were carried out. Pressure distributions between the evenness rolls were analyzed. And then, several pressure schemes were designed within the bearing range of the rolling machine. A matching model between air and oil pressures of evenness rolls was established. Finally, experiments were carried out to compare the differences when air and oil pressures were taken according to matching values and empirical values, respectively. The results show that the average residual ratio is 7.3% when the empirical oil pressures are taken, while the maximum residual ratio is lower than 5% and the average residual ratio is 3.1% when the oil pressures are taken according to the air-and-oil matching model, which meets the requirement of the axial uniformity in the production.

Key words: evenness roll, squeezing uniformity, pressure distribution, compatibility model