TUBE SHAPING MILL Russian patent published in 2007 - IPC B21C37/08 

FIELD: rolled tube production, namely equipment for making shaped, square and rectangular cross section tubes.

SUBSTANCE: mill for shaping tubes, mainly straight-seam ones with maximum outer diameter 140 mm includes drive unit; forming stands; entry and outlet roller tables and wells for ready tubes. Entry roller table includes rollers with two-cone barrels having minimum diameter in mean portion along their length and with inclination angle of generatrix of cone part of barrel relative to horizon equal to 25°. Unit for rotating tube by angle in range of 45° is mounted on entry roller table. Two universal stands are used as forming stands; said stands have roll passes made with possibility of changing shape and area of cross section of roll passes due to respective mounting of rolls. Two pairs of vertical centering rollers are successively arranged between stands. Invention provides elimination of welded seam presence in corner of roll grooved pass that is in parting zone of rolls.

EFFECT: lowered manufacturing costs due to shortened idling periods of mills and lowered roll consumption.

3 cl, 2 dwg, 1 ex