MULTI-STAGE ROLLING MILL FOR ROLLING UNIT WITH FINISHING ROLLING MILL WITH INCLINED ROLLS, HOT PILGER ROLLING OR AUTOMATIC ROLLING MILL TYPE Russian patent published in 2020 - IPC B21B23/00 

FIELD: technological processes.

SUBSTANCE: present invention relates to rolling. Rolling mill (1) for hollow articles comprises support structure (3) forming bed (4) for arrangement of stands of rolling mill (10A, 10B, 15A, 15, 15B) installed in series along axis of rolling (100). Rolling mill comprises first section (41) for rolling on long mandrel and second section (42) for rolling without mandrel, located after first section (41) relative to movement direction of said hollow items. Rolling mill is also equipped with facilities for support of mandrel. According to the present invention, the first set of stands (10A, 10B) and / or the second set of stands (15A, 15, 15B) comprises at least one stand with detachable rolls, wherein the plant comprises a second inclined rolling mill to obtain a final thickness of the hollow articles, operating on a mandrel located before the first rolling mill, wherein first section (41) is configured to roll the obtained rolled hollow articles to obtain the required thickness.

EFFECT: possibility of improving the surface quality of hollow articles and improving reliability of equipment.

9 cl, 8 dwg