Abstract: A device (10) for the in-line detection of surface defects of a rolled product (30) in a rolling stand (11, 111) comprises an inspection unit (19) having one or more coils (20, 21) able to generate and detect magnetic fields. The rolling-stand (11, 111) is provided with a support structure (28) supporting rolling means (12, 112) that are provided for effecting a roll-mill process on said product (30), a guide element (13) having a guide hole (14) defining a nominal rolling axis (X) and a support unit (15, 115), assembled on the support structure (28) and which is provided as a structural element of the rolling stand (11, 111) that supports said guide element (13). The inspection unit (19) is assembled on said support unit (15, 115), in order to be directly housed and integrated in the structural element already present in the rolling stand (11, 111).

Abstract: A method is provided to control the feed of a metal charge into an electric arc furnace having at least one electrode to generate an electric arc to melt metals. The method includes: a step of defining a “cover index CI” of the electric arc by the slag present above the liquid metal bath, in order to calculate which of the harmonics present in an electric feed quantity of the furnace are taken into consideration; a step of measuring the actual cover index CI value during a functioning cycle of the furnace; and a step of adjusting the speed of feed of the metal charge into the furnace based on the measured value of the cover index CI.

Abstract: Device and method to control the straightness and torsions of a long product (11), comprising at least two profile-detection devices (12a, 12b, 12c), each presenting a visual field (13) that includes a perimeter segment (18a, 18b, 18c) of the section of the product (11). The detection devices are aligned along the product (11) and are oriented so as to detect homologous perimeter segments (18a, 18b, 18c) located on different planes. The device also comprises a command unit which receives and compares with each other the section images detected at the same instant by the detection devices (12a, 12b, 12c) and determines, according to this comparison, the lack of straightness and/or the presence of torsions in the product (11).

Abstract: Method and device to detect defects (11a, 11b, 11c) in the section shape of a product (10), wherein the following steps are provided: a step of constructing and memorizing a plurality of families of functions each of which describes a correlated type of defect (11a, 11b, 11c), or combination of defects which can be found in a product (10) observed in relation to the processing performed on the product (10); a step of dimensional measuring of the shadow cast by the product (10) when it is illuminated by a beam of light; a step of constructing a graphical representation relating to the development of the dimension of the shadow for a specific dimensional sector of the product (10); and a step of comparing the graphical representation of the functions memorized to identify the function which most resembles the representation obtained by the detection in order to classify the type, and to determine the entity, of the defect (11a, 11b, 11c) present in the section of the product (10).

Abstract: Device and method to control the straightness and torsions of a long product (11), comprising at least two profile-detection devices (12a, 12b, 12c), each presenting a visual field (13) that includes a perimeter segment (18a, 18b, 18c) of the section of the product (11). The detection devices are aligned along the product (11) and are oriented so as to detect homologous perimeter segments (18a, 18b, 18c) located on different planes. The device also comprises a command unit which receives and compares with each other the section images detected at the same instant by the detection devices (12a, 12b, 12c) and determines, according to this comparison, the lack of straightness and/or the presence of torsions in the product (11).

Abstract: Method and device to detect defects (11a, 11b, 11c) in the section shape of a product (10), wherein the following steps are provided: