TUBE FORMING MILL Russian patent published in 1995 - IPC

FIELD: production of tubes, having small and mean diameters. SUBSTANCE: mill has a frame, supporting forming stands with edge-guiding rollers and additional forming roller-type apparatus, arranged between terminal forming stands. The additional roller-type apparatus is provided by a roller, whose axle is mounted normally relative to an axis of tube forming; the roller engages with edges of the tube, being formed. A distance from a forming axis until a plane, being tangent with a lateral surface of the roller and arranged in parallel with the axis of forming at a side of the roller, being nearest to the tube, being formed, is equal to (0.95-0.98) of a radius value of the tube. EFFECT: enhanced quality of small and mean diameter tubes. 1 cl, 3 dwg, 1 tbl