SIZING-SHAPING FOUR-ROLL STAND Russian patent published in 2012 - IPC B21B17/14 

FIELD: process engineering.

SUBSTANCE: proposed stand comprises foundation with guides supporting cartridge displacing thereon and provided with base, two driven horizontal and two idle vertical rolls with bearing assemblies, and pressure mechanisms of horizontal and vertical rolls. Said stand is equipped with hydraulic cylinders arranged along the axis of sizing (shaping) to press said cartridge to said foundation. The latter is equipped with two additional frames to support pressure mechanism for every vertical roll fitted in cases. Note here that one of said additional frames can turn to let cartridge pass by in roll changing. Stand cartridge is provided with vertical posts secured on foundation to accommodate horizontal and vertical roll supports and cases with vertical rolls that displace over height.

EFFECT: higher quality of sized (shaped) direct-seam welded tubes.

3 dwg