Abstract:
Apparatus for straightening metal products comprising: at least one rotation shaft on which at least one straightening roll is installed in a selectively removable manner; a first structure provided with at least a first support member configured to hold and support a first end of the rotation shaft; a second structure provided with at least a second support member configured to selectively support and hold a second end, opposite the first end, of the rotation shaft; a movement member configured to move the second structure toward/away from the first structure and to allow the installation or removal of the straightening roll from the rotation shaft.
Abstract:
The invention relates to a method and to a device for the stretch-bend leveling of a metal strip (B), wherein the metal strip (B) is alternately bent around stretching rollers (1-5) under a tensile stress and the degree of stretching is thus increased, wherein one or more stretching rollers (1-5) are provided with a non-metal coating. The method and the device are characterized in that one or more stretching rollers are provided with a coating (8) of plastic.
Abstract:
A manufacturing assembly for manufacturing a metal part comprises a flattening module having a trolley and at least one pressing roller. The flattening module is movable along a stapling line of the metal part. The flattening module comprises at least one pressing actuator that is arranged to move the at least one pressing roller in a determined pressing direction relative to the trolley and to place the pressure roller bearing against the free surface such that the at least one pressing roller exerts pressure on the free surface in said determined pressing direction. The pressure increases auto-adaptively with an altitude of the free surface in a direction opposite the determined pressing direction.
Abstract:
Methods and apparatus to monitor conditioning machines are disclosed herein. An example system includes a plurality of work rolls to process a continuous strip material positioned between an entry and an exit of an apparatus. A sensor determines a measured distance between an upper surface of the strip material and a reference location, where the sensor is downstream from the exit of the apparatus. A controller determines a difference value between the measured distance and a predetermined distance to detect material curvature in the strip material.
Abstract:
The invention relates to a method and stretch-bending straightener for straightening metal strips (1) by stretch-bending, comprising a plurality of straightening rolls (5a, 6a, 7a, 8a) which are arranged behind one another in the strip flow direction (D) and spaced from one another in the strip flow direction (D), wherein the strip (1) subject to tensile stress below the limit of elasticity is alternately bent around the straightening rolls (5a, 6a, 7a, 8a), undergoing plastic elongation, wherein a deflecting roll (5b, 6b, 7b) is arranged upstream of one or more straightening rolls (5a, 6a, 7a), respectively, wherein said straightening rolls can be adjusted relative to the strip (1) and wherein said deflecting roll has a larger diameter than the respective downstream straightening roll. Said method and said system are characterized in that, in order to vary the immersion depth, the straightening rolls (5a, 6a, 7a) can be adjusted relative to the associated deflecting roll (5b, 6b, 7a) such that the free strip length (F) between the run-off point (9) of the strip (1) from the deflecting roll to the run-on point (10) of the strip (1) onto the associated straightening roll does not exceed a predefined maximum value, above which longitudinal undulations of the strip form. The system is preferably designed such that, as the immersion depth and/or the angle of contact are varied, the free strip length never exceeds the maximum value over the entire adjusting range.
Abstract:
The invention relates to a method for tension levelling a cold-rolled strip, whereby the strip passes through a series of break rolls and a series of traction rolls and in the course of its extension is subjected to traction between the two series of rolls. The strip is bent under traction in a series of high-traction rolls, located between the brake roll and the traction roll series, in order to increase the degree of levelling. To achieve this, the series of high-traction rolls between the brake and the traction rolls has at least two traction rolls for generating the strip traction and bending operation.
Abstract:
Process for continuously producing on a production line a rolled stainless steel sheet product having an improved surface state, characterized in that the hot produced sheet is subjected to a treatment comprising at least: a primary pickling for removing scale, cold rolling in at the most three rolling passes, a final annealing, a final pickling, and a cold rolling of the "skin pass" type. There is optionally effected, before the primary pickling, a stretcher levelling which produces a residual elongation of 1 to 5% for cracking the layer of oxide and rendering the sheet planar. Apparatus for carrying out the invention process is also described.
Abstract:
The stretch leveling or stretch-bend leveling of aluminum or stainless steel strip of a thickness of 0.1 to 0.5 mm is carried out following a measurement of strip nonplanarity or strip profile by regulating the stretch in the stretch leveler or the contour of a roller thereof or both and/or by regulating the depth of penetration or degree of bending by the stretch-bend rollers. The tension in the strip just before coiling is varied in response to measurement of the thickness of the strip across the width, thereby optimizing the leveling and surface qualities of the strip.
Abstract:
A process for planishing under traction a thin metal strip in an installation including a planisher comprising at least one bending unit with two planishing sets and a multi-roller leveling assembly comprising two rows of rollers. The imbrication of the planishing sets and the multi-roller leveling assembly and two tension blocks, respectively, are adjusted upside and downside to obtain a prescribed elongation of the strip. Flatness faults in the planisher are corrected by adjusting the through-speeds and imbrication of the planishing sets, such that the prescribed elongation for planishing is substantially attained by the time the strip leaves the planisher. At least longitudinal camber faults due to the passage in the planisher are corrected in the multi-roller assembly by setting up degressive imbrications of the rollers between the input and output of the multi-roller assembly by swinging one row with respect to the other so as to cause progressively diminishing reverse bending effects without substantially increasing the elongation already produced in the planisher by traction-bending.
Abstract:
A method for leveling a metal strip performs a leveling operation by opening leveling rolls at a predetermined position relative to a welded joint and closing at a predetermined position relative to the welded joint. The tension exerted on the metal strip while the leveling rolls are held open is set at a given value in relation to the metal strip length where the leveling rolls are held open. The tension to be exerted on the metal strip while leveling is selected so that the tension may cause a given rate of elongation on the metal strip and thereby levels the metal strip. The leveling device is applicable for implementing the leveling process including a quick open and a quick close upon encountering welded joints of the strips. The leveling device includes features in that the leveling rolls as held open and thus released from the metal strip and self-propelled to rotate.