Primetals Technologies Japan, Ltd.

Mitsubishi-Hitachi Metals Machinery, Inc.

Primetals Technologies Austria Gmbh

Tatsunori Sugimoto

Kenji Horii

Akio Kuroda

Akira Sako

Kiyoshi Kagehira

Alois Seilinger

Lukas Pichler

Shinya Kanemori

Tadashi Hiura

Roman Winkler

Takao Owada

Manfred Hackl

Shunsuke Murato

Hiroaki Watanabe

Yuji Abe

Angles of an upper-side pair of an upper work rollA and an upper backup rollA, and a lower-side pair of a lower work rollB and a lower backup rollB are adjusted in a state where the upper-side pair is kept parallel and in a state where the lower-side pair is kept parallel. Thereafter, work-roll pressing apparatusesA andB, work-roll position control apparatusesA andB, backup-roll pressing apparatusesA andB, and backup-roll position control apparatusesA andB are controlled such that the angles of the upper work rollA and the lower work rollB are adjusted in a state where the angles of the upper backup rollA and the lower backup rollB are maintained.

Hot rolling mills and hot rolling methods

A hot rolling millincludes a control apparatusthat adjusts an angle formed between an upper-side pair of an upper backup rollA and an upper work rollA and a lower-side pair of a lower backup rollB and a lower work rollB in a state where the upper-side pair is kept parallel and in a state where the lower-side pair is kept parallel. The hot rolling millis configured such that the work rollsA andB satisfy the condition that DW/Lb is equal to or smaller than 0.30 where DW is a diameter of the work rollsA andB, and Lb is the maximum strip width of a rolled material, and the hot rolling millperforms rolling in a state where a bending force is applied to the work rolls.

A control deviceobtains second pressing forces acting on work-side and drive-side roll chocksA andB on the basis of entry side and exit side first pressing forces, and controls at least one of work roll position control devicesB andB and at least one of work roll pressing devicesB andB changing a position of at least one of the roll chocksA andB in such a manner that a difference between the work-side second pressing force and the drive-side second pressing force is equal to or smaller than a predetermined value.

Rolling mills and rolling methods

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.

Six-high rolling mill stand and finishing mill train for hot rolling an intermediate strip into a thin strip

In a twin-roll continuous caster configured to cast molten steel supplied to a molten metal pool between cooling rolls into a cast piece by, for example, cooling and solidifying the molten steel on the surfaces of the cooling rolls, the pair of cooling rolls each have ridges on the surface thereof, and cast-piece edges and a cast-piece central portion are generated. Specifically, the cast-piece edges are generated by pressing and bonding lateral edges of one of solidified shells to lateral edges of the other solidified shells, the lateral edges of the solidified shells being produced by cooling and solidifying the molten metal on surfaces of collars provided at lateral end portions of the cooling rolls. The cast-piece central portion contains the unsolidified molten steel between the solidified shells and is generated by cooling and solidifying the molten steel on the surfaces of the laterally central portions of the cooling rolls.

Twin-roll continuous caster

A twin-roll continuous casting machine includes: a moving mechanism for moving, relative to one roll, another roll; a plurality of upper side support rolls for supporting the one-roll side of a cast slab separated from the one roll and withdrawn; and a plurality of lower side support rolls for supporting the other-roll side of the cast slab pulled out from the clearance between both rolls. The upper side support rolls are rotatably supported by first bearers, while the lower side support rolls are rotatably supported by second bearers having a force for urging the lower side support rolls toward the cast slab. The cast slab is transported, with an upper surface portion of the cast slab pulled out from the clearance between both rolls serving as a reference surface.

Growing community of inventors

Hiroshima, Japan

Tatsunori Sugimoto