PIPE ROLLING AT CONTINUOUS MULTISTAND TOLLING MILL Russian patent published in 2015 - IPC B21B25/02 

FIELD: process engineering.

SUBSTANCE: invention relates to pipe rolling. This process comprises rolling at mandrel of rolling plant (R) including rolling mill (5) with several stands (12) that define the rolling axis (X) and direction (23). First loader (1), first unloader (2) and first mandrel conveyor (6) are arranged at the mill feed side (20). Second unloader (3), second loader (4) and second mandrel conveyor (7) are arranged at the mill exit side (22). Note here that this process comprises loading of hollow body (39, 41) along rolling axis (X) from feed side (20), loading of mandrel (31, 32) along said axis (X) from exit side (22) and coupling of mandrel first end part with second conveyor (7). Mandrel is displaced in axis through rolling mill (5) and hollow body inner space while mandrel second end part is secured to first conveyor (6). First end part is released while rolling is performed at simultaneous feed of mandrel (31) by first conveyor (6) in direction (L3) opposed to rolling direction (23). Mandrel (31, 32) is withdrawn from rolled pipe (40, 42) and rolling mill (5). Proposed production line incorporates the appropriate equipment.

EFFECT: perfected method.

11 cl, 12 dwg