LONGITUDINAL WELDED TUBE PRODUCTION MILL Russian patent published in 2014 - IPC B21C37/08 

FIELD: process engineering.

SUBSTANCE: invention aims at enhancing the quality of small- and medium-diameter longitudinal welded tubes. Proposed mill comprises frame to accommodate stand with vertical rolls, drive forming rolls with open and closed passes and edger rolls alternating therewith, welding device and biller edge position transducer. Pressure at welding rolls at butt welding of edges and heating losses thereat are reduced by arranging edge centering mechanism and tube billet reduction and sizing rolls behind the last closed pass, said rolls having rolling diameter and profile. Bed is mounted on said frame to integrate forming rolls with open and closed passes, mill edger rolls and edge centering mechanism. Crossbar arranged at the bed is fitted with disc blade and support roll. Said disc blade and support roll have vertical adjustment mechanism while disc blade has additional horizontal adjustment plane. Mechanism centering edges is composed by roll with disc-like wedge ledge at the center to be adjusted in vertical plane and through angle of turn in both sides relative to mill axis. Edger rolls are secured at rails arranged at bed top section.

EFFECT: perfected design.

2 cl, 8 dwg