Abstract: An apparatus for surface processing of cylindrical bodies including a work station (100) for rotatably supporting the cylindrical body (1), a laser emitter (600) movable along a main direction (X) parallel to the rotation axis (K) of the cylindrical body (1) and according to an auxiliary direction (Z) transverse to the main direction (X), a distance sensor (700) for detecting a control parameter relative to a distance of the sensor or the laser emitter (600), and a control unit (15) configured for commanding a movement of the laser emitter (600) and of the distance sensor (700) along said main direction (X), commanding the emission of a laser beam directed towards a surface of the cylindrical body (1), executing a correction procedure adapted to compensate for the eccentricity of the cylindrical body (1) with respect to said rotation axis (K).

Abstract: A lamination cylinder includes a surface structure, on which a plurality of craters is defined having a different geometry and a random distribution. Some of the craters are partially superimposed with respect to each other.

Abstract: A lamination cylinder includes a surface structure, on which a plurality of craters is defined having a different geometry and a random distribution. Some of the craters are partially superimposed with respect to each other.

Abstract: A machine for the surface treatment of a cylinder includes a first operative station for supporting the cylinder and for bringing it into rotation around its longitudinal axis, and at least a second operative station cooperating with the first station for generating and emitting, by means of an optical fiber apparatus, pulsed laser radiations randomly striking the surface of the cylinder and defining a desired roughness on the same surface; the second station being adjustably coupled with the first station in a first direction parallel with respect to the axis of the cylinder and carrying one or more pulsed laser radiation emitting heads, and slidingly assembled with respect to the cylinder in a second direction perpendicular to the axis of the cylinder.

Abstract: A calibration device for gauges for the measurement of the geometrical characteristics of cylinders, such as the diameter, profile, rotundity and eccentricity errors, wherein such gauges include a pair of movable opposing arms equipped with feelers or sensors at their free ends, includes a pair of abutments reciprocally approachable and/or withdrawable by means of motors until a sample measure is obtained, as desired, within the measuring range of the gauge, on which the calibration device is assembled, revealed by means of measuring means cooperating with the abutments, such that consequently the feelers or sensors are respectively abutted or approached to the abutments to reveal the sample measure.

Abstract: A lamination cylinder includes a surface structure, on which a plurality of craters is defined having a different geometry and a random distribution. Some of the craters are partially superimposed with respect to each other.

Abstract: A machine for the surface treatment of a cylinder includes a first operative station for supporting the cylinder and for bringing it into rotation around its longitudinal axis, and at least a second operative station cooperating with the first station for generating and emitting, by means of an optical fiber apparatus, pulsed laser radiations randomly striking the surface of the cylinder and defining a desired roughness on the same surface; the second station being adjustably coupled with the first station in a first direction parallel with respect to the axis of the cylinder and carrying one or more pulsed laser radiation emitting heads, and slidingly assembled with respect to the cylinder in a second direction perpendicular to the axis of the cylinder.

Abstract: A method for positioning operative cylinders, for example of rolling-mills or paper-mills on a grinding machine, includes at least the following steps: A—positioning the transversal, longitudinal center-line plane of the cylinder in correspondence with a reference point situated between a movable piece-holder head and tailstock center of the machine; B—moving the piece-holder head and the tailstock center in the direction of the cylinder until there is a reciprocal coupling. The present invention relates also to a machine for implementing the above method.

Abstract: A calibration device for gauges for the measurement of the geometrical characteristics of cylinders, such as the diameter, profile, rotundity and eccentricity errors, wherein such gauges include a pair of movable opposing arms equipped with feelers or sensors at their free ends, includes a pair of abutments reciprocally approachable and/or withdrawable by means of motors until a sample measure is obtained, as desired, within the measuring range of the gauge, on which the calibration device is assembled, revealed by means of measuring means cooperating with the abutments, such that consequently the feelers or sensors are respectively abutted or approached to the abutments to reveal the sample measure.

Abstract: A contrast device for the grinding of products, particularly but not exclusively cylinders, held between centres, wherein a grinding machines (21) comprise a holding structure (20) equipped with a grinding wheel (24) to which a cylinder to be processed (22) is opposed, and the contrast device (23) is situated on the opposite side of the cylinder (22) with respect to the grinding wheel (24), the contrast device (23) comprising a slide (25) assembled on a short pipe (26) sliding inside a body (27) of the contrast device (23) by an interposed actuator (28, 35), there also being a blocking element (29) of the relative position of the short pipe (26) with respect to the body (27) and an irreversible blocking device (31, 32, 33) of the position of the pipe (26) with respect to the cylinder (22).

Abstract: A method for classification of defects and running of grinding of lamination cylinders includes identifying defect areas in a map illustrating a plurality of surface measurements of a cylinder. The method includes calculating, for each area identified, a plurality of parameters. The method includes identifying a type of defect associated with the areas identified, on the basis of the parameters calculated. The method includes determining an acceptability threshold of a specific defect for each type of defect identified. The method includes defining a corrective action for each area on the basis of a comparison between the acceptability threshold associated with the type of defect of the area, and a measurement of the surface measurements of the cylinder associated with the area. The method includes determining grinding parameters on the basis of the surface measurements of the cylinder, if the corrective action is a grinding operation to remove the defects.

Abstract: Measuring apparatus (50) of geometrical parameters of cylinders, rolls and similar elements (11), used for the rolling of flat products operating on a machine for the grinding of said cylinders with an autonomous movement, i.e. with a movement independent of the translation movement of the grinding wheel or other parts, characterized in that it comprises at least four sensors (54, 55), situated on a surface orthogonal to the cylinder (11) or roll and in that at least two of said sensors are situated in opposite positions.

Abstract: Method (100) for the classification of defects and running of the grinding of lamination cylinders comprising the following phases which consist in: a) identifying defect areas in a map illustrating a plurality of surface measurements of a cylinder; b) calculating, for each defect area identified, a plurality of typical parameters; c) identifying a type of defect associated with said defect areas identified, on the basis of said parameters calculated; d) determining (120) an acceptability threshold of the specific defect for each type of defect identified; e) defining (130) a corrective action for each defect area on the basis of the comparison between said acceptability threshold associated with the type of defect of said defect area, and a measurement of said plurality of surface measurements of the cylinder associate with said defect area; f) determining (140) grinding parameters on the basis of said surface measurements of said cylinder, if the corrective action defined in phase c) is a grinding operation

Abstract: Measuring apparatus (50) of geometrical parameters of cylinders, rolls and similar elements (11), used for the rolling of flat products operating on a machine for the grinding of said cylinders with an autonomous movement, i.e. with a movement independent of the translation movement of the grinding wheel or other parts, characterized in that it comprises at least four sensors (54, 55), situated on a surface orthogonal to the cylinder (11) or roll and in that at least two of said sensors are situated in opposite positions.