Cold rolling tube mill 350-8 (3D)

A unique cold rolling mill CRTM 350-8 is designed for cold rolling of seamless tubes with outer diameter from 140 mm to 325 mm from carbon, alloyed and stainless steel with ultimate strength in initial state up to 1000 MPa. Such tubes have highly precise sizes, wall thickness, outer and inner diameters, high quality of outer and inner surfaces and favorable metal structure. The tubes are typically used in space and aircraft engineering, shipbuilding, petrochemical and chemical industries, and other sectors of machinery building. CRTM 350-8 mill is designed for front charging of a billet with its feeding to the deformation zone by pressing it to the end, with front drive location of left (or right) design. Rolling process is carried out by reciprocating grooves with a variable profile on a cone-shaped or curved mandrel fixed in axial direction. When rolls approach their end positions a tube is released from the grooves. Feeding and turning of the tube is performed in end rear and front positions of the stand.