A roll bender apparatus is disclosed for bending a work piece, the apparatus including a base, a bending roller rotatably disposed on the base, a first guide roller rotatably disposed on base. and a second guide roller rotatably disposed on the base. A first work piece guide assembly is movable about the first guide roller and a second work piece guide assembly movable about the second guide roller. The first and second work piece guide assemblies are oriented to receive the work piece, and the first and second work piece guide assemblies are configured to move about the first and second guide rollers respectively in response to the work piece being bent as the work piece is advanced between the bending roller and the first and second guide rollers.

A method for shape control in a rolling mill includes: a measurement step of measuring a shape of a steel sheet on a delivery side of the rolling mill; and a control step of controlling the rolling mill in a manner that the shape of the steel sheet falls within an allowable range, based on the shape of the steel sheet measured at the measurement step, wherein the control step includes a step of setting a control gain smaller than a control gain for a width of a steel sheet as a target for rolling being equal to or smaller than the predetermined value when the steel sheet as the target for rolling has a width greater than a predetermined value.

A roll bender apparatus is disclosed for bending a work piece, the apparatus including a base, a bending roller rotatably disposed on the base, a first guide roller rotatably disposed on base. and a second guide roller rotatably disposed on the base. A first work piece guide assembly is movable about the first guide roller and a second work piece guide assembly movable about the second guide roller. The first and second work piece guide assemblies are oriented to receive the work piece, and the first and second work piece guide assemblies are configured to move about the first and second guide rollers respectively in response to the work piece being bent as the work piece is advanced between the bending roller and the first and second guide rollers.

A method for manufacturing a ring-rolled product, which manufactures the ring-rolled product from a ring material, includes a step of rolling the ring material, which has an operation of rolling the ring material from both inner and outer circumferential sides thereof between a mandrel roll and a main roll in a state of rotating the ring material toward one side in a circumferential direction thereof, and induction-heating the ring material by induction heating elements. An induction heating element is disposed on only an outer circumferential side of the ring material or is disposed on each of both the inner and outer circumferential sides in a region immediately before the rolling, or an inclined portion is provided in an outer-peripheral edge portion of a coil in the induction heating element.

A method for manufacturing a ring-rolled product, which manufactures the ring-rolled product from a ring material, includes a step of rolling the ring material, which has an operation of rolling the ring material from both inner and outer circumferential sides thereof between a mandrel roll and a main roll in a state of rotating the ring material toward one side in a circumferential direction thereof, and induction-heating the ring material by induction heating elements. An induction heating element is disposed on only an outer circumferential side of the ring material or is disposed on each of both the inner and outer circumferential sides in a region immediately before the rolling, or an inclined portion is provided in an outer-peripheral edge portion of a coil in the induction heating element.

A 20-high rolling mill configured for rolling a metal strip, which includes a housing system comprising two parts capable of moving relative to one another, respectively forming an upper housing part, configured to transmit a clamping force to the four backup roller assemblies, of the upper group, and an upper housing part, configured to transmit a clamping force to the four backup roller assemblies of the lower group, and a door cooperating, in a closed position, with a peripheral frame of a fixed frame structure of the housing system surrounding the maintenance window, said door closing, in a sealed manner, said maintenance window. A system of axial stops for the second intermediate rolls accompanies the movements of the upper and lower housing parts.

A six-high rolling (also known as sexto) mill stand that is suited for hot rolling an intermediate strip into a thin strip that is less than 0.8 mm thick. A combined casting and rolling installation that includes the six-high rolling mill stand allowing for hot rolling in long uninterrupted sequences, without any change of the work rolls to obtain a strip with good geometry due to moderate rolling forces.

A six-high rolling (also known as sexto) mill stand that is suited for hot rolling an intermediate strip into a thin strip that is less than 0.8 mm thick. A combined casting and rolling installation that includes the six-high rolling mill stand allowing for hot rolling in long uninterrupted sequences, without any change of the work rolls to obtain a strip with good geometry due to moderate rolling forces.