A rolling process for long solid-section products includes the steps of rolling stock through a plurality of rolling mill stands, the rolled stock being subjected to a tensile load, between the plurality of stands, that generates a single-axial deformation greater than 0.1 in the rolling direction, and is also deformed by compression between the rolls of at least one of the rolling mill stands, thereby achieving a reduction in the cross section area of at least 5%, preferably of between 5 and 50%. A rolling mill, in which a plurality of stands is connected by spacer elements designed to offset the tensile load; a rolling mill, in which a plurality of stands is connected by elements designed to offset the overturning moment generated by the tensile load; and a rolling mill, in which the aforesaid rolling stands maintain a non-slip condition.

Disclosed within is a slit section pass formation unit having a pair of rolls and a de-ribbing means, where the pair of rolls has a roll profile configured to produce a pair of slit rods with symmetrical dimensions, the pair of slit rods connected via a rib, and the de-ribbing means to remove the rib in its entirety forming a first slit rod and a second slit rod.

The present invention relates to a multi-stand rolling mill for tubular bodies. The rolling mill comprises a first section for rolling on mandrel defined by a first plurality of rolling stands arranged in sequence along a rolling axis. According to the invention, the rolling mill also comprises a second rolling section without mandrel, arranged downstream of said first section, which comprises a second plurality of stands arranged in sequence along said rolling axis. Each stand of said second section comprises three rollers having rotation axes which are arranged at 120? from one another. The rotation axes for each stand are rotated by 180? with respect to corresponding rotation axes of an adjacent stand. According to the invention, at least one stand of said second section comprises a motorized roller having a vertical rotation axis.

A rolling process for long solid-section products includes the steps of rolling stock through a plurality of rolling mill stands, the rolled stock being subjected to a tensile load, between the plurality of stands, that generates a single-axial deformation greater than 0.1 in the rolling direction, and is also deformed by compression between the rolls of at least one of the rolling mill stands, thereby achieving a reduction in the cross section area of at least 5%, preferably of between 5 and 50%. A rolling mill, in which a plurality of stands is connected by spacer elements designed to offset the tensile load; a rolling mill, in which a plurality of stands is connected by elements designed to offset the overturning moment generated by the tensile load; and a rolling mill, in which the aforesaid rolling stands maintain a non-slip condition.

A method is provided for roll-forming a sheet metal strip (35) by driving the sheet metal strip through a row of forming stations (17, 18) having pairs of rollers (19, 20; 29, 30) directed towards each other and both holding the sheet metal strip therebetween and forming the sheet metal strip over roller edges. In every second forming station (12), two angles (41, 42) are gradually formed and in every second forming station two other angles (43, 44) are gradually formed.

A slit plant comprises a rest bar (14), for regulating the transversal position of an inlet guide to the molder unit (12), a rolling unit for reducing the billet to a rolled section having two sections, a cutting box (13) for separating the two sections into two separate strands, one or more rolling units for rolling the two strands (1, 2), pairs of speed and/or section measurers (20, 21) downstream of the cutting box (13), a shear (15). The method for controlling the plant provides measuring the rolling speeds V1 and V2 of each of the two strands (1, 2) and/or of the respective sections A1 and A2 of the two strands (1, 2) downstream of the cutting box (13) by means of pairs of measurers; detecting the lengths of the two strands (1, 2) and calculating the difference in length thereof, based on which the plant, in a successive feedback step, is activated to decrease the difference in length between the two strands (1, 2).

A method is provided for roll-forming a sheet metal strip (35) by driving the sheet metal strip through a row of forming stations (17, 18) having pairs of rollers (19, 20; 29, 30) directed towards each other and both holding the sheet metal strip therebetween and forming the sheet metal strip over roller edges. In every second forming station (12), two angles (41, 42) are gradually formed and in every second forming station two other angles (43, 44) are gradually formed.