Work roll balance force setting method of rolling mill. Determine kiss roll load Pk, rolling load Pr, and rolling torque Tr of work rolls relative to work roll angle x of tip position of rolled material between start and completion of biting of rolled material using mill longitudinal rigidity coefficient K and rolling condition. Determine traction coefficient rt between work and intermediate rolls, and maximum value rtmax of rt in relation to x when hypothetical work roll balance force Pb is applied from sum P of Pk, Pr, and Pb, and Tr between start and completion of biting. Compare tolerated value rter of rt with rtmax. Work roll balance force at start of biting reset to equal to or larger than required when rt assumes maximum value rtmax, and equal to or smaller than limit based on strength of rolling mill, when rter is equal to or larger than rtmax.

In order to provide an adjustment of the roll gap under load with high positioning accuracy and regulation accuracy, a cross-rolling unit for adjusting rolls operating under load with, disposed on a force-absorbing roll stand, a mechanical setting unit for a first cross-roll setting and a hydraulic setting unit for a second cross-roll setting, wherein the mechanical setting unit includes two mutually displaceable mechanical subassemblies having a common axis of symmetry and the hydraulic setting unit includes at least two mutually displaceable hydraulic subassemblies having respectively one central axis, has the mechanical setting unit and the hydraulic setting unit disposed in the force-absorbing roll stand as a common subassembly. The axis of symmetry of at least one of the mutually displaceable mechanical subassemblies and the central axes of each of the mutually displaceable hydraulic subassemblies are the same.

Provided is a rolling mill, a tandem rolling line including the same, and a rolling method capable of using small-diameter work rolls for rolling hard materials and capable of high-quality strips. A rolling mill includes: work rolls configured to roll a rolling material; intermediate rolls supporting the work rolls from above and below, respectively; back-up rolls supporting the intermediate rolls from above and below, respectively; position adjusting means for adjusting the positions of the intermediate rolls relative to the work rolls and the back-up rolls in the direction of conveyance of the rolling material; detecting means for detecting horizontal forces on the work rolls; offset-amount calculating means for calculating the offset amounts of the intermediate rolls based on the horizontal forces on the work rolls detected by the detecting means; and controlling means for controlling the position adjusting means such that the positions of the intermediate rolls are offset by the offset amounts calculated by the offset-amount calculating means.

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 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 hot-rolling stand (10) for a hot-rolling mill comprises an adjusting device (12), which is intended for receiving a pair of work rolls (17) and for positioning work rolls (18, 19; 20, 21) of the pair of work rolls (17) in relation to one another to define a roll gap. In order to create a hot-rolling stand (10) that can be adapted as flexibly as possible, the adjusting device (12) is designed to interchangeably accommodate, in the pair of work rolls (17), different roll diameter ranges by means of mutually complementary work rolls (18, 19; 20, 21).

The present disclosure relates to an asymmetric rolling device capable of enhancing a physical property of materials and may include: a first work roll contacting a first surface of a material to be rolled; a second work roll contacting a second surface of the material to be rolled and having a second radius greater than a first radius of the first work roll so as to asymmetrically roll the material to be rolled; a drive roll contacting the first work roll and formed above or below the first work roll so as to drive the first work roll; a driving device driving the second work roll or the drive roll; and a first idle roll contacting the first work roll and formed at a front or a back of the first work roll to support the first work roll in a longitudinal direction of the material.

The present disclosure relates to an asymmetric rolling device capable of enhancing a physical property of materials and may include: a first work roll contacting a first surface of a material to be rolled; a second work roll contacting a second surface of the material to be rolled and having a second radius greater than a first radius of the first work roll so as to asymmetrically roll the material to be rolled; a drive roll contacting the first work roll and formed above or below the first work roll so as to drive the first work roll; a driving device driving the second work roll or the drive roll; and a first idle roll contacting the first work roll and formed at a front or a back of the first work roll to support the first work roll in a longitudinal direction of the material.