摘要:
A flatness-measuring roll for detecting flatness defects of a metal strip extending and moving in a strip-travel direction has a roll body having a cylindrical outer surface and a central axis extending generally perpendicular to the strip-travel direction and about which the body is rotatable. A plurality of measuring bars axially spaced along the body, recessed in the body, and having outer faces flush with the body surface are each at least limitedly radially shiftable relative to the body. The bars are angularly elongated, each extend along a plane substantially perpendicular to the roll axis, and each have a constant width measured parallel to the roll axis over generally all of a respective total angular length. At least two respective force-measuring sensors are braced radially between each of the bars and the roll body.
摘要:
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.
摘要:
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.
摘要:
A strip storage arrangement with a strip storage unit in strip treatment plants. The strip storage unit is divided into two or more storage sections. Each strip storage section has its own tension drive. Speed-controlled intermediate strip drives are arranged between the storage sections. The intermediate strip drives apply the bending and friction forces of the preceding storage section, so that the tension input value of the first loop strand of each storage section is equal. The resulting strip storage unit can have any storage capacity and is of simple and operationally safe construction.
摘要:
An apparatus used in combination with a hot-rolling line having a succession of roll stands through which passes a strip workpiece in a horizontal transport direction has at least one vessel downstream of the roll stands in the direction and aligned in the direction therewith. This vessel is formed with an upstream inlet and a downstream outlet. A bath of a liquid coolant fills the vessel to a level above the inlet and outlet openings. Guides draw the workpiece from the roll stands into the inlet, through the vessel, and out of the outlet thereof. Thus the workpiece is wholly immersed in and cooled by the liquid coolant within the vessel. A pump feeds fresh coolant into the vessel and withdraws hot coolant therefrom. A plurality of such vessels, each with a respective bath and pump means, is provided with all of the inlets and outlets aligned. The inlet and outlet are formed as horizontally extending slots closely conforming the cross-sectional shape of the workpiece.
摘要:
A looper has a fixed support carrying a plurality of guides and a movable support carrying a plurality of guides, with a strip being looped back and forth between the guides of the two supports. The movable support is connected via a cable or chain to a winch carried on a rotary output member of a planetary-gear transmission having two inputs. One of these inputs is rotated continuously at a predetermined speed while the other input is rotated at a variable speed determined by the rotation rate of the output member.
摘要:
A method and a surface evenness measuring roller for determining surface evenness measurement errors in steel and metal band comprising at least one measuring head having part measuring heads which part measuring heads are integrated respectively offset by 180° into the roller mantel and supported on two force transmitters and are further separated from the roller mantle by means of a circumferential motion gap and are braced with respect to one another by means of at least one tie rod wherein in the course of a measurement of the band tensile stress distribution over the whole band width the band with band is subject to tension over its whole band width wraps around the surface evenness measuring roller with a predetermined arc of contact and thereby exerts pressing forces onto the surface evenness measuring roller from which pressing forces can be determined the band tension distribution.
摘要:
A tension leveling system for thin metal strip has between a brake roll set and a tension roll set, additional two-roll bridles in which one or more inlet stretch leveling regions are followed by an elastic deformation region and the latter is followed by one or more stretch leveling regions. The stretch leveling regions can effect plastic deformation.
摘要:
A method and apparatus for the contactless determination of planarity and a ferromagnetic metal strip during transit of the strip through a strip-processing line or cold-rolling line. Hysteresis loops repetitively impressed in the metal strip and the tangential magnetic field strength is measured at a surface thereof and electromagnetic parameters are determined from the time course of the tangential field strength signal. The parameters are functions of the mechanical stress which is evaluated to determine residual intrinsic stress distribution and then the planarity or nonplanarity of the strip.
摘要:
A method of descaling rolled or cast metal strip, especially stainless steel or titanium-alloy steel strip in which the initial descaling is effected in a stretch-bend leveler and the annealing furnace directly follows the stretch-bend leveler and is directly followed by a pickling station so that any shot blast or brush descaler upstream of the annealing furnace is not required.