A plant for the production and packaging of bars and steel profiles includes a rolling station of rods and profiles of indefinite length, a cooling station, a scrap separation station, a diverter device, cutting shears, intended to cut said bars and profiles in bar portions having a fixed length, and a speed changing device, able to move the bar portions at a speed rate such that they can be placed within respective grooves or housing provided on the outer surface of at least one cylinder or rotating drum. Each cylinder or rotating drum is associated with a speed changing device, so that the housing receives bar portions at different speeds, depending on the fact that the housing belong to one first or to at least second rotating cylinder, in order to avoid overlap of the bar portions when the same are discharged onto the cooling plate.

A pinch roll delivers a respective rolled product. A control device opens the pinch roll at a respective trigger time and at a respective transport speed of the respective rolled product. The control device determines the respective trigger time and/or the respective transport speed using a model that depends on a coefficient of friction. After opening the pinch roll, a measuring device detects iteratively a position or a derivation in time of the position of the respective rolled product. The detected positions or the detected derivations in time of the position are provided to the control device. The control device in dependency on the positions or the derivations in time of the position updates the coefficient of friction and uses the updated coefficient of friction for determining the respective trigger time and/or the respective transport speed for the next rolled product delivered by the pinch roll.

A drum (10,12) for receiving, transporting and discharging long metal products (P), such as bar or the like, preferably coming from a hot rolling mill: the drum includes at least one pair of channels (C1-C2) extending longitudinally axially and the channels being around the circumference of the drum, the channels simultaneously receive two long products (P1,P2), respectively one long product in each one of the channels that is part of the pair. Also a method and a system for handling long rolled products coming from different strands of a rolling mill are disclosed.

A pinch roll delivers a respective rolled product. A control device opens the pinch roll at a respective trigger time and at a respective transport speed of the respective rolled product. The control device determines the respective trigger time and/or the respective transport speed using a model that depends on a coefficient of friction. After opening the pinch roll, a measuring device detects iteratively a position or a derivation in time of the position of the respective rolled product. The detected positions or the detected derivations in time of the position are provided to the control device. The control device in dependency on the positions or the derivations in time of the position updates the coefficient of friction and uses the updated coefficient of friction for determining the respective trigger time and/or the respective transport speed for the next rolled product delivered by the pinch roll.

A contactless braking system and a related method for decelerating long products (bi) exiting from a rolling mill (100). At least one braking module (6) includes a multiplicity of electromagnets (60) in a series along a braking line (1b). Each magnet has an open magnetic core (61) and a coil (62) around the magnetic core (61). The open magnetic core (61) has a gap formed by two opposed poles. The electromagnets (60) are configured so that the gap of each open magnetic core (61) lets contactlessly slide therethrough each long product (bi) exiting from the rolling mill (100). A braking magnetic force (Fd) is exerted on the long product (bi) contactlessly sliding through the gap. The braking magnetic force (Fd) is opposite to the direction of movement of the long product (bi) exiting the rolling mill (100).

A plant for the production and packaging of bars and steel profiles includes a rolling station of rods and profiles of indefinite length, a cooling station, a scrap separation station, a diverter device, cutting shears, intended to cut said bars and profiles in bar portions having a fixed length, and a speed changing device, able to move the bar portions at a speed rate such that they can be placed within respective grooves or housing provided on the outer surface of at least one cylinder or rotating drum. Each cylinder or rotating drum is associated with a speed changing device, so that the housing receives bar portions at different speeds, depending on the fact that the housing belong to one first or to at least second rotating cylinder, in order to avoid overlap of the bar portions when the same are discharged onto the cooling plate.

A bar unloading apparatus of the revolver type, comprising: a longitudinal rotor (10) divided into at least three longitudinal stretches (11, 12, 13) integral with one another and adapted to rotate about a longitudinal rotation axis, on the outer longitudinal surfaces of which there is provided a plurality of longitudinal channels, extending on the at least three stretches over the whole longitudinal extension of the rotor (10) and parallel to said longitudinal axis, to receive respective longitudinal bars, and at least one braking device for braking the longitudinal bars entering in at least one of the longitudinal channels, wherein the at least one braking device is integrated in at least one first stretch (12) of said at least three longitudinal stretches (11, 12, 13), is rotationally fixed to the longitudinal rotor (10) and is provided with braking elements (1) in each of said longitudinal channels so that said at least one braking device can rotate together with the longitudinal rotor (10) and brake the longitudinal bars even during a rotation of the longitudinal rotor (10).

A contactless braking system and a related method for decelerating long products (bi) exiting from a rolling mill (100). At least one braking module (6) includes a multiplicity of electromagnets (60) in a series along a braking line (1b). Each magnet has an open magnetic core (61) and a coil (62) around the magnetic core (61). The open magnetic core (61) has a gap formed by two opposed poles. The electromagnets (60) are configured so that the gap of each open magnetic core (61) lets contactlessly slide therethrough each long product (bi) exiting from the rolling mill (100). A braking magnetic force (Fd) is exerted on the long product (bi) contactlessly sliding through the gap. The braking magnetic force (Fd) is opposite to the direction of movement of the long product (bi) exiting the rolling mill (100).