A combined continuous casting and endless rolling plant for a metal strip, comprisinga continuous casting line (1) for casting a slab;a first rolling mill (6) for roughing the slab and for obtaining a transfer bar;a second rolling mill (11) for finishing the transfer bar and for obtaining a strip;a third rolling mill (18), comprising at least two first rolling stands (17), for further reducing the thickness of the strip;accumulation means (20) of the strip, downstream of said third rolling mill (18), comprising at least one first high-capacity reel (37, 37) dimensioned to wind and unwind a coil weighing from 80 to 250 tons and/or up to 6 meters in diameter, named mega coil;flying cutting means (13), arranged between said third rolling mill (18) and said accumulation means (20), configured to cut the strip after the mega roll has been wound on the at least one first reel (37, 37);a cutting and winding line (22), downstream of said accumulation means (20), for cutting the strip of the mega coil and winding portions of said strip of the mega coil to a predetermined weight limit or coil diameter limit, producing a plurality of coils; wherein said cutting and winding line (22) is provided with a reversible rolling mill for performing at least one rolling of the strip before producing said plurality of coils.

A furnace for heating metal strips, and to a device and a method for producing metal strips by continuous casting and rolling. The device includes a casting machine, a furnace through which a metal strip can be transported in a conveying direction, a first external cutting apparatus and a second external cutting apparatus, the first external cutting apparatus being upstream of the furnace and the second external cutting apparatus being downstream of the furnace, in the conveying direction of the metal strip, and at least one rolling mill. A first internal cutting apparatus and a second internal cutting apparatus are provided inside the furnace. A segment of the metal strip between said internal cutting apparatuses can be separated by actuating the latter.

A method for producing a metal strip in a cast-rolling installation, the cast-rolling installation includes the following: a casting machine, a first furnace, a first shear, a roughing train, a second furnace, a second shear, a finishing train, a cooling section, a reeling system, and a third shear. In order to allow a flexible reaction to different operating conditions, at least one of the following operating modes is selected in order to produce the strip: a) a continuous rolling, in which the casting machine, the roughing train, and the finishing train are operatively connected together; b) a continuous rolling in the roughing train and a single-strip rolling in the finishing train; c) a single-strip rolling in the roughing train and a single-strip rolling in the finishing train; and d) a semi-continuous rolling in the roughing train and/or a semi-continuous rolling in the finishing train.

A continuous casting and rolling apparatus according to one embodiment of the present invention provides: a continuous caster for generating a steel sheet; a first rolling unit associated with the continuous caster; and a second rolling unit which is spaced apart in the outlet of the first rolling unit and comprises: a rolling mill for pressing down the steel sheet; and a cutter for cutting a portion of the steel sheet, wherein the cutter is spaced from the second rolling unit by a length corresponding to the length of the steel sheet discharged in an at least discontinuous rolling mode, and may comprise a cut withdrawal unit provided between the first rolling unit and the second rolling unit. In addition, a continuous casting and rolling method according to another embodiment of the present invention is a continuous casting and rolling method in which a continuous rolling mode and a discontinuous rolling mode are switched to and from each other, and may comprise: a continuous casting step for generating a steel sheet; a rolling step for pressing down the steel sheet to a rolling mill after the continuous casting step; and a cutting step for cutting the steel sheet between the continuous casting step and the rolling step in a discontinuous rolling mode, and cutting the steel sheet with a cutter provided by being spaced apart from the rolling mill at an interval corresponding to the length of the steel sheet being cut and discharged in an at least discontinuous rolling mode.

A sheet roll forming method includes an uncoiling step for uncoiling a coil by an uncoiler provided at a start of a process line, a straightening step for straightening the coil from the uncoiler to be a flat panel, a piercing step for forming holes for various purposes in the panel fed from the straightening step by a piercing press, a sheet roll forming step for cutting the panel to be a sheet with a predetermined dimension by a running cutter and for successively bending the cut sheet to be a shaped beam by a multi-stage roll forming unit, and a bending step for curvature forming the shaped beam to be a shaped product by a round bender.

A steel plant for the production of long metal products includes a continuous casting machine and a rolling mill disposed contiguous and in direct succession downstream of the continuous casting machine. The continuous casting machine is provided with at least two casting lines and the rolling mill is provided with at least two rolling lines. The plant includes a single feed apparatus for feeding molten metal, and the at least two casting lines are configured to receive molten metal from the single feed apparatus.

An apparatus (100) and method for the production of elongated metal products such as bars, rods or the like: A rolling mill (10) with at least one rolling stand (5); a casting station (20) with at least a first casting line (2a) and at least a second casting line (2b), each line (2a, 2b) being operable to produce respective elongated intermediate products (b2a, b2b), such as billets; wherein at least the first casting line (2a) is directly aligned with the rolling mill (10), the first casting line (2a) being configured to feed the rolling mill (10) with a fully continuous casting strand or with cast elongated intermediate products; and the second casting line (2b) is not aligned with the rolling mill (10). A bidirectional transfer device (30) for transferring elongated intermediate products (b2b) of the second casting line (2b) alternatively in a first direction from the second casting line (2b) to the first casting line (2a) to align the elongated intermediate product (b2b) with the rolling mill (10) or in a second direction from the at least second casting line (2b) to a cooling bed (40).

A hot-rolled steel sheet not exceeding a coil opener allowable load during unwinding includes a steel sheet cut in unsteady portions at its longitudinal head and tail ends in a cutting step after a rough rolling step, having a width of 1,200 mm to 2,300 mm, a thickness of 13 mm to 25.4 mm, and at least an API standard X65-grade strength, and used in a state of being unwound after having been wound around a coil. A longitudinal end corresponding to the unwinding start includes a portion at its widthwise center recessed inwards in the longitudinal direction with respect to its two widthwise ends, the two widthwise ends projection sizes with respect to the recessed portion at the widthwise center are 20 to 295 mm, and the sum of the widths of projecting portions at the two widthwise ends is set to to of the sheet width.

Method for the production of flat metal products, in particular coils of strip, in endless and/or semi-endless mode, in which a metal product is continuously fed to a rolling mill consisting overall of at least 4 stands. The rolling stands are, in sequence, roughing stands, and finishing stands. It is provided to perform a flying gauge change of the metal product exiting from the rolling mill.

Disclosed are an automatic shearing apparatus for a cold-rolled plate of variable thickness, and a shearing method using the apparatus. The method comprises that: a thickness gauge (4) and a length-measuring device (3) are successively arranged in front of shears (5); and a control device identifies the profile of a strip material passing through the thickness gauge (4) according to length tracing data and measured thickness values, and determines the position of the strip material at the shears (5), simultaneously compares the profile with the set profile of a plate of continuously variable thickness, and decides the action time of the shears. The apparatus and the method can efficiently and accurately shear rolls of supplied materials of continuously variable thickness into plates of continuously variable thickness which can be directly used by a user.