Secim

Clecim

Societe De Vente De L'aluminium Pechiney

Andre Quehen

Michel Chevet

Roger Figueres

An imbricated roll planisher comprising, inside a fixed stand, two planishing systems each including a plurality of live planishing rolls with parallel axes, rotatably mounted in a supporting chassis and each associated with at least one row of support rollers, the assembly being pressed, on the side remote from the strip to be planished, against a resistant bearing beam. At least one of the planishing systems bears against the corresponding bearing beam via a set of hydraulic jacks distributed across the entire surface covered by the system, in parallel rows of at least two jacks, each row corresponding to one of the live planishing rolls. By individually adjusting the position and the pressure of the jacks of each of the rows, it becomes possible to determine the degree of imbrication and the distribution of the force applied on each of the live rolls, it being possible to make this adjustment even while the strip is feeding through.

Imbricated roll planisher and process for its use

Installation for planishing a metal strip moving in a longitudinal feed direction, comprising a fixed supporting stand having two vertical members, lower and upper resistant bearing beams and lower and upper planishing roll systems each comprising a row of parallel live rolls that bears upon a support chassis via at least one row of bearing rolls. At least one of the planishing systems bears upon the corresponding bearing beam via a set of adjustable actuators interposed between the chassis of the system and the resistant bearing beam, the actuators being distributed across the entire surface covered by the system. The system is associated with a device for individually adjusting the position of the bearing end of each actuator in relation to the bearing beam in order to adjust and maintain the position of the chassis and live rolls in relation to the corresponding rolls of the other system for the adjustment of the imbrication of the rolls.

Metal strip planishing installation

A device for adjusting the profile of a roll with a deformable wall (1) mounted rotatably about a central shaft (2). Blocks (3) are aligned along the axis between a bearing face (21) of the shaft (2) and the cylindrical inner face (12), and hydraulic thrust jacks (4) are arranged between the face (21) and a bearing face (32) of the blocks (3) at the opposite, for adjusting the radial position of each block (3). The axial and transverse dimensions of each block (3) are different, and its plane and rectangular bearing face (32) works together with a single hydraulic jack (41) having an oblong working cross-section covering the greater part of the face (32). The invention applies especially to rolling-mill cylinders.

Device for adjusting the profile of a roll with a deformable wall

A roll with a rotating shell comprises, between a stationary shaft (2) in the shape of an elongate beam and a rotating shell (3) mounted for rotation around an axis on the shaft (2), a row of supporting shoes (4) with a fluid bearing. The roll is equipped with at least one device (6) for recovery of at least a part of the lubricating fluid escaping from the supporting shoes (4), the device being applied against the inner wall (30) of the jacket (3) to form with the latter a recovery zone (7) which is open in the reverse direction to the rotation of the shell, the zone (7) being connected to a circuit (8) for removing the recovered fluid.

Roll with a rotating shell

Apparatus for detecting faults in inherent flatness in a moving stretched strip, comprising a deflector roll in the form of a cylinder covered by a thin casing. Cavities are machined in the cylinder and arranged on a helix traced on the roll. Each cavity contains a displacement detector whose moving part in contact with the inner surface of the thin casing moves in the radial direction of the roll under the action of the stresses exerted by the sheet. The detectors have a primary winding and a secondary winding through which passes a core, solid with the moving part of the detector. The apparatus includes an optical encoding system for marking the angular position of the roll and a programming apparatus for sending a pulse of current to the primary windings of the detectors once under load and once not under load. A collector and processor for the emitted signals allow calculation of the values proportional to the tension in the strip, along its width. The invention may be used, for example, for monitoring the inherent flatness of thin, cold-rolled sheets.

Apparatus for detecting faults in the inherent flatness of a stretched

This disclosure relates to a process for the regulation of the thickness of a flat product such as a strip, sheet or plate, being rolled in a hot tandem rolling mill, and the corresponding regulation device for carrying out the process. Regarding each stand of the rolling mill on which the adjustment is being performed, a constant rolling pressure is maintained, the gap is measured, the deviation between the measured gap and a set value corresponding to a desired thickness of the product is determined, and the necessary correction of the value of the tensile force applied on the product between the stand under consideration and the upstream stand in order to bring the gap back to its set value is determined. Finally, this correction of the tensile force between the stand under consideration and the upstream stand is performed.

Thickness control method and apparatus for a rolling mill

A universal cassette type stand for a continuous rolling line which can be converted from a universal beam stand having two horizontal rolls and two vertical rolls into a stand having two horizontal rolls for rolling structural shapes. Each horizontal and vertical roll includes two hydraulic tightening jacks each associated with a different chock. Each jack is provided with a servo-valve, a position sensor, and a pressure probe. The supply of each jack is servo-controlled by a regulation loop where the measurement of the tightening is transformed into a position reference depending on the modulus of either the lower or upper part or sides of the stand. The regulation or control loop is such that one of several alternatives for rolling the beam to a desired mode can be accomplished. For instance, the loop can be set up to obtain (1) a constant web, constant flange thickness while maintaining symmetry of the web relative to the flange, or (2) the loop can be set up to obtain a ratio thickness of web relative to the flanges while still maintaining symmetry of the web relative to the flange.

Rolling mill stand

An apparatus for producing a rolled product from a continuously cast blank provides a continuous casting in a groove in a wheel which groove is closed over part of its length by a metal ribbon and the length of closed groove is adjustable to obtain, for the product being produced, the optimum characteristics of the blank at emergence from the groove for a given wheel speed.

Apparatus for varying the mold length of endless belt molds using

A device for restoring the mechanical properties of the metal band used for closing the mould in the wheel of a machine for the continuous casting of liquid metal comprises a plurality of planishing rollers arranged with their axes parallel to the axis of the casting wheel and to bear against opposite faces of the band in a region in which the band is not in contact with the wheel, the rollers being spaced apart in the direction of movement of the band therebetween so that they are not opposite one another.

Device for restoration of the mechanical characteristics of the metal

A deflector roll for measuring and checking the flatness of sheet metal under tension and as it passes round the roll comprises a non rotatable inner portion carrying axially spaced radial stress detectors in axially spaced measurement zones spaced by neutral zones, and a continuous rotatable outer envelope to be contacted by the sheet and to transmit the radial stresses to the detecting devices, the envelope having an axially variable flexibility such that it is less flexible in those portions which cover the measurement zones than in those portions which cover the neutral zones.

Deflector roll for measuring and checking the flatness of sheet metal

In a process of hot continuous rolling of an aluminium alloy blank formed by a continuous casting grooved wheel wherein the blank from the wheel is fed at the normal temperature for hot rolling between the cylinders of a train of two-cylinder stands, at least at the first stand the thickness H of the blank is reduced by a value .DELTA.H satisfying the relationship (h/a ).ltoreq. C, where h = H - (.DELTA.H/2), a = .sqroot.R.DELTA. H, R is the radius of the rolling cylinders and C is a constant depending on the alloy.

Growing community of inventors

Pontoise, France

Andre Quehen