SIMULATION OF THE PROCESS OF ROLLING CASINGS IN A LONGITUDINAL ROLLING MILL WITH A SHORT MANDREL TO DETERMINE THE INFLUENCE OF THE THICKNESS OF THE CASING ON THE PROCESS OF ROLLING

Abstract

Longitudinal tube rolling mills with short mandrels are well known, particularly automatic mills. The most typical problems associated with this technology include wall thickness variation (uneven wall thickness) of the resulting rolled product and internal surface defects, such as scoring or scratching. Numerous studies have been dedicated to solving these issues. With the emergence of new research meth-ods, such as computer simulation, novel opportunities have arisen for investigating the specific characteris-tics of the longitudinal tube rolling process. This paper presents a study on the rolling process of hollow shells with varying degrees of thin-walledness in an automatic longitudinal tube rolling mill equipped with a short mandrel, using the QForm software. Based on the results of numerical simulations, factors contrib-uting to increased wall thickness variation and internal surface defects in the final product have been ana-lyzed.